CN101296167B - Method for requesting burst distribution transmission bandwidth for ascending mixed automatic re-transmission - Google Patents
Method for requesting burst distribution transmission bandwidth for ascending mixed automatic re-transmission Download PDFInfo
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- CN101296167B CN101296167B CN2007100979464A CN200710097946A CN101296167B CN 101296167 B CN101296167 B CN 101296167B CN 2007100979464 A CN2007100979464 A CN 2007100979464A CN 200710097946 A CN200710097946 A CN 200710097946A CN 101296167 B CN101296167 B CN 101296167B
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Abstract
The invention discloses a method for distributing transmission bandwidth for upstream HARQ bursty in a multi-hop relay network and an upstream HARQ bursty transmission method. The method for distributing transmission bandwidth comprises the following steps: when distributing retransmission bandwidth after the transmission failure on an access link and initial bandwidth transmission, a multi-hop base station selects one from two bandwidth distribution modes according to the communication quality of the access link to carry out distributing the transmission bandwidth for every HARQ bursty; when distributing retransmission bandwidth after transmission failure on a middle link, retransmission bandwidth is distributed to all links among the next grade nodes of receiving failure nodes and MR-BS. The transmission method comprises the following steps: bandwidth is distributed and the upstream HARQ bursty transmission is carried out; if the multi-hop base station receives successfully, the steps are finished; otherwise, the retransmission bandwidth is distributed to carry out retransmission. The proposal of the invention can adjust the bandwidth distribution according to the communication quality, thereby improving the utilization ratio of bandwidth and reducing the waste of transmission resources.
Description
Technical field
The present invention relates to the communications field, more specifically, relating to a kind of is ascending HARQ (mixed automatic retransmission request) burst allocation transmission bandwidth and the method for transmitting this ascending HARQ in mobile multi-hop relaying (MMR) network.
Background technology
As shown in Figure 1, in the MMR system that IEEE802.16j working group proposes, one or several Relay Stations (relay stations, abbreviate RS as) be set at MMR-Base Station (base station, abbreviate BS as) and Mobile Stations (portable terminal, abbreviate MS as) between, the continuous relaying by signal reaches the expansion of coverage and the increase of power system capacity; The configuration of an existing MMR system as shown in Figure 1, the signal transmission between MR-BS and the MS is finished via one-level or several grades of relayings; Wherein, the purpose that RS2 and RS3 be set is for extended coverage range; The purpose that RS1 is set is in order to increase power system capacity.Motion 802.16j-06/026r2 has been described in detail this.In order to satisfy the needs of different application scene, RS can be set to fixing or move.According to whether needs send prefix and MAPs, RS further is distinguished into transparent and nontransparent in addition.
In the MMR network, there is the mode of two kinds of MAPs generations and resource allocation, in centralized scheduling, MR-BS (multi-hop base station) produces MAPs and is all link scheduling resources, and RS does not have the scheduling of resource ability; In distributed scheduling, MR-BS and RS are respectively its adjacent station and distribute MAPs.Because the difference of the characteristics of RS and RS number is variable, a lot of different topological structures are arranged in the MMR.
In motion 802.16j-06_019, defined access link, repeated link, k jumps MS, and k jumps RS and adjacent station (neighbor station).Access link is the link between MS and its service station, and the service station of MS can be RS, MR-BS and BS.Repeated link is the link between RS and its service station, and the service station of RS can be RS, MR-BS.K jumps MS and refers to that MS communicates by letter with MR-BS through the k jumping.K jumps RS and refers to that RS communicates by letter with MR-BS through the k jumping.The neighbour station at a station is to communicate by letter with this station with only needing a station of jumping.Directly connect between per two network element and be called an adjacent jumping (hop).
According to the characteristics of RS between MS and the MR-BS, the ascending HARQ mechanism in the MMR network is different.For the MS of double bounce, if sending to the data-signal of MR-BS, MS relies on transparent RS relaying, and this transparent RS only needs relaying MS to send to the data-signal of MR-BS, and the MAPs broadcast of MR-BS can directly be received by MS.If the data burst that receives the MS transmission of transparent RS success, and know incorrect this HARQ data burst that receives of its MR-BS, transparent RS replaces MS to carry out the re-transmission that HARQ happens suddenly.For the MMR path that relies on nontransparent RS to transmit signal,, retransmit and correctly receive the node of burst from last in order to reduce time delay and to save bandwidth.No matter be transparent RS or the nontransparent RS that does not have dispatching, all there is not MAP to produce and the scheduling of resource ability, burst is transmitted the bandwidth that needs and must be distributed by MR-BS on a plurality of links between MS and the MR-BS, so, in up link, the time slot that MR-BS allocates the initial transmission bandwidth in advance to repeated link can have influence on the utilization ratio of bandwidth.
Therefore, in UL (up link) the HARQ mechanism of centralized resources scheduling, lack a kind of effective method and determine that MR-BS gives the time slot of repeated link allocation of transmission resources.
Summary of the invention
The technical problem to be solved in the present invention provides and is the method for the first transmission bandwidth of ascending HARQ burst allocation in a kind of multi-hop relay network, be used for solving the MMR network owing on repeated link to HARQ the be not used problem of the wasting of resources that brings of pre-assigned transfer resource that happens suddenly.
Comprise:
Multi-hop base station is when the described high communication quality, and selecting first kind of allocated bandwidth mode is the first transmission bandwidth of each HARQ burst allocation, otherwise then selects the mode of second kind of allocated bandwidth to be the first transmission bandwidth of each HARQ burst allocation:
First kind: be the required bandwidth of this HARQ burst transfer of all link assignment;
Second kind: multi-hop base station is the access link allocation of transmission bandwidth earlier; After receiving that the relay station adjacent with MS receives the feedback signal of uplink burst success, multi-hop base station is the relay distribution transmission bandwidth again;
Wherein, multi-hop base station judges that the method for described communication quality is:
Jump MS for m, N the continuous affirmation ACKm-2/ failure NAKm-2 feedback signal that the MR-BS record is received recently is if the shared ratio of ACKm-2, is just thought the high communication quality of access link greater than predetermined threshold value P; Otherwise think that the communication quality of access link is low; Described P is greater than 0.5 and less than 1.
Further, multi-hop base station selects for use the allocated bandwidth mode to be meant according to the communication quality of access link: multi-hop base station is selected above-mentioned first kind of allocated bandwidth mode when the described high communication quality, otherwise then selects the mode of second kind of allocated bandwidth.
Further, multi-hop base station judges that the method for described communication quality is:
Jump MS for m, N the continuous affirmation ACKm-2/ failure NAKm-2 feedback signal that the MR-BS record is received recently is if the shared ratio of ACKm-2 just thinks that greater than predetermined threshold value P the communication quality of access link is better; Otherwise think that the communication quality of access link is poor.
Described P is greater than 0.5 and less than 1.
Further, a via node receives HARQ according to this node and happens suddenly successfully/fail, and can give even higher level of node by respective feedback ACK/NAK signal;
After a via node is received the ACKn/NAKn signal, then can be corresponding to its even higher level of node feeding back ACK n+1/NAKn+1 signal.
Further, before carrying out the allocated bandwidth mode first time, adopt the mode of acquiescence that allocated bandwidth is carried out in the transmission of burst; The mode of described acquiescence can be selected in the above-mentioned dual mode any according to actual conditions.
The another technical problem that the present invention will solve provides and is the method for ascending HARQ burst allocation transmission bandwidth in a kind of multi-hop relay network, comprising:
During re-transmission allocated bandwidth on to middle link during bust this, retransmit bandwidth for the next stage node of the node that takes defeat and all link assignment between MR-BS;
Re-transmission bandwidth on to first transmission bandwidth and access link during bust this is carried out the branch timing:
Multi-hop base station is when the described high communication quality, and selecting first kind of allocated bandwidth mode is the first transmission bandwidth of each HARQ burst allocation, otherwise then selects the mode of second kind of allocated bandwidth to be each HARQ burst allocation transmission bandwidth:
First kind: when the initial transmission of an ascending HARQ burst of scheduling, be the required bandwidth of this HARQ burst transfer of all link assignment;
Second kind: when the initial transmission of a HARQ burst of scheduling, multi-hop base station is the access link allocation of transmission bandwidth earlier; After receiving that the relay station adjacent with MS receives the feedback signal of uplink burst success, multi-hop base station is the relay distribution transmission bandwidth again;
Wherein, multi-hop base station judges that the method for described communication quality is:
Jump MS for m, N the continuous affirmation ACKm-2/ failure NAKm-2 feedback signal that the MR-BS record is received recently is if the shared ratio of ACKm-2, is just thought the high communication quality of access link greater than predetermined threshold value P; Otherwise think that the communication quality of access link is low; Described P is greater than 0.5 and less than 1.
Further, multi-hop base station selects for use the allocated bandwidth mode to be meant according to the communication quality of access link: multi-hop base station is selected above-mentioned first kind of allocated bandwidth mode when the described high communication quality, otherwise then selects the mode of second kind of allocated bandwidth.
Further, multi-hop base station judges that the method for described communication quality is:
Jump MS for m, N the continuous affirmation ACKm-2/ failure NAKm-2 feedback signal that the MR-BS record is received recently is if the shared ratio of ACKm-2 just thinks that greater than predetermined threshold value P the communication quality of access link is better; Otherwise think that the communication quality of access link is poor.
Described P is greater than 0.5 and less than 1.
Further, a via node receives HARQ according to this node and happens suddenly successfully/fail, and can give even higher level of node by respective feedback ACK/NAK signal;
After a via node is received the ACKn/NAKn signal, then can be corresponding to its even higher level of node feeding back ACK n+1/NAKn+1 signal.
Further, before carrying out the allocated bandwidth mode first time, adopt the mode of acquiescence that allocated bandwidth is carried out in the transmission of burst; The mode of described acquiescence can be selected in the above-mentioned dual mode any according to actual conditions.
The another technical problem that the present invention will solve provides the transmission method of up mixed automatic retransmission request HARQ burst in a kind of multi-hop relay network, comprising:
(a) multi-hop base station is when the described high communication quality, and selecting first kind of allocated bandwidth mode is the first transmission bandwidth of each HARQ burst allocation, is HARQ burst allocation transmission bandwidth otherwise then select the mode of second kind of allocated bandwidth:
First kind: when the initial transmission of an ascending HARQ burst of scheduling, be the required bandwidth of this HARQ burst transfer of all link assignment;
Second kind: when the initial transmission of a HARQ burst of scheduling, multi-hop base station is the access link allocation of transmission bandwidth earlier; After receiving that the relay station adjacent with MS receives the feedback signal of uplink burst success, multi-hop base station is the relay distribution transmission bandwidth again;
Wherein, multi-hop base station judges that the method for described communication quality is:
Jump MS for m, N the continuous affirmation ACKm-2/ failure NAKm-2 feedback signal that the MR-BS record is received recently is if the shared ratio of ACKm-2, is just thought the high communication quality of access link greater than predetermined threshold value P; Otherwise think that the communication quality of access link is low; Described P is greater than 0.5 and less than 1;
(b) carry out the transmission that ascending HARQ happens suddenly according to the bandwidth of being distributed; If multi-hop base station receives described HARQ and happens suddenly successfully then finish; Otherwise, if bust this on intermediate line link is then carried out (c), otherwise is returned (a);
(c) retransmit bandwidth for the next stage node of the node that takes defeat and all link assignment between MR-BS.
Further, in the step (a): multi-hop base station is selected above-mentioned first kind of allocated bandwidth mode when the described high communication quality, otherwise then selects the mode of second kind of allocated bandwidth.
Further, in the step (a), multi-hop base station judges that the method for described communication quality is:
Jump MS for m, N the continuous affirmation ACKm-2/ failure NAKm-2 feedback signal that the MR-BS record is received recently is if the shared ratio of ACKm-2 just thinks that greater than predetermined threshold value P the communication quality of access link is better; Otherwise think that the communication quality of access link is poor.
Described P is greater than 0.5 and less than 1.
Further, in the described step (b), a via node receives HARQ according to this node and happens suddenly successfully/fail, and can give even higher level of node by respective feedback ACK/NAK signal;
After a via node is received the ACKn/NAKn signal, then can be corresponding to its even higher level of node feeding back ACK n+1/NAKn+1 signal.
After having adopted the solution of the present invention, can improve the utilization ratio of bandwidth, reduce the waste of transfer resource, and can not cause bigger time delay according to the distribution of the actual mass situation adjustment of communicating by letter to bandwidth.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is a wireless multi-hop relay network allocation plan of the prior art; And
Fig. 2 is to be the concrete implementing procedure figure of the method for the first transmission bandwidth of up mixed automatic retransmission request HARQ burst allocation in the multi-hop relay network of the present invention; And
Fig. 3 is the MMR network topology structure in the application example of the present invention;
Fig. 4 is the schematic flow sheet that MR-BS allocates transfer resource in advance in the prior art to all links between MS and the MR-BS; And
Fig. 5 is that MR-BS carries out the pre-assigned schematic flow sheet of transfer resource for the link between MS and the MR-BS in the prior art; And
Fig. 6 be in the inventive method MR-BS according to the situation of access link determine whether carrying out to the link between MS and the MR-BS allocate in advance transfer resource ascending HARQ embodiment schematic flow sheet; And
Fig. 7 is among the present invention, and MR-BS and RS1 receive the ascending HARQ embodiment schematic flow sheet under the initial transmission failure scenarios.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
The invention provides and be the method for ascending HARQ burst allocation transmission bandwidth in a kind of multi-hop relay network, comprising:
During re-transmission allocated bandwidth on to middle link during bust this, retransmit bandwidth for the next stage node of the node that takes defeat and all link assignment between MR-BS.
Re-transmission bandwidth on to first transmission bandwidth and access link during bust this is carried out the branch timing:
MR-BS is that ascending HARQ burst mode of allocation of transmission bandwidth on each link is a kind of in following two kinds:
First kind: MR-BS at first gives all required bandwidth of this HARQ burst transfer of link assignment between MS and the MR-BS.
Second kind: MR-BS at first distributes the uplink burst transmission bandwidth for access link, if data are transmission success on access link, promptly the RS with the MS direct communication receives successfully/fails, then feeding back ACK (affirmation)/NAK (failure) signal is given even higher level of node, even higher level of node is if RS, after then it receives the ACK/NAK signal, just to its even higher level of node feeding back ACK 1/NAK1 signal, promptly a via node receives HARQ according to this node and happens suddenly successfully/fail meeting respective feedback ACK/NAK signal to even higher level of node; And after a via node receives the ACKn/NAKn signal, then can be to its even higher level of node respective feedback ACKn+1/NAKn+ 1 signal.If a m jumps MS, MR-BS just gives the repeated link allocation of transmission bandwidth behind the ACKm-2 signal of receiving adjacent R S feedback.
The statement here " first kind " and " second kind " only for the difference dual mode, do not play the qualification effect.
Before ascending HARQ burst transfer of MR-BS scheduling, communication quality according to access link decides selected allocated bandwidth mode: when the described access link high communication quality is better in other words, just select above-mentioned first kind of allocated bandwidth mode, otherwise then select the mode of second kind of allocated bandwidth.
In communication process, when MR-BS transmits required bandwidth for each ascending HARQ burst allocation, all be the allocated bandwidth mode of selecting this burst according to current communication quality; Before carrying out the allocated bandwidth mode first time, adopt the mode of system default that allocated bandwidth is carried out in the transmission of burst; Here Mo Ren mode can be selected in the above-mentioned dual mode any according to actual conditions.
MR-BS judges that the method for described access link communication quality is: jump MS for a m, MR-BS can receive the ACKm-2/NAKm-2 signal of the feedback of its adjacent R S, in this N that receives recently continuous feedback signal, if the shared ratio of ACKm-2 signal illustrates the described high communication quality so greater than threshold value P; Otherwise, illustrate that communication quality is low.Described P be one greater than 0.5 less than 1 threshold number, the meaning of representative is ack signal shared ratio in N feedback signal.
Here the value of N and P is determined according to simulation result, under identical channel variance situation, determines the value of N and P with time delay minimum and the most effective situation of bandwidth usage.
MS for a m jumping, the RS that MR-BS is adjacent gives MR-BS feeding back ACK m-2/NAKm-2 signal according to the reception condition of uplink burst: if in up HARQ burst transfer process, the ascending HARQ burst of access link takes defeat, so, the RS that MR-BS is adjacent is then to MR-BS feedback NAKm-2 (denying) signal; If the burst of access link ascending HARQ receives successfully, then the RS that MR-BS is adjacent is to MR-BS feeding back ACK m-2 signal.
In communication process, adjacent R S should happen suddenly for the descending HARQ that receives to MR-BS feeding back ACK/NAK signal in HARQ ACK region, happen suddenly to MR-BS feeding back ACK m-2/NAKm-2 signal for the ascending HARQ that receives again, for making MR-BS distinguish this two kinds of different feedbacks, can but be not limited to it is placed on diverse location in the uplink frame of RS respectively.
The present invention also provides and has been the method for the first transmission bandwidth of up mixed automatic retransmission request HARQ burst allocation in a kind of multi-hop relay network, as shown in Figure 2, with in the said method to first transmission bandwidth, the method for carrying out the branch timing with the re-transmission bandwidth during bust this on the access link is consistent.
The present invention also provides the method for the up mixed automatic retransmission request HARQ of transmission in a kind of multi-hop relay network, comprising:
(a) multi-hop base station is selected above-mentioned first kind of allocated bandwidth mode when the high communication quality of access link, is HARQ burst allocation transmission bandwidth otherwise then select the mode of second kind of allocated bandwidth:
First kind: when the initial transmission of an ascending HARQ burst of scheduling, be the required bandwidth of this HARQ burst transfer of all link assignment;
Second kind: when the initial transmission of a HARQ burst of scheduling, multi-hop base station is the access link allocation of transmission bandwidth earlier; After receiving that the relay station adjacent with MS receives the feedback signal of uplink burst success, multi-hop base station is the relay distribution transmission bandwidth again;
(b) carry out the transmission that ascending HARQ happens suddenly according to the bandwidth of being distributed; If multi-hop base station receives described HARQ and happens suddenly successfully then finish; Otherwise, if bust this on intermediate line link is then carried out (c), otherwise is returned (a);
(c) retransmit bandwidth for the next stage node of the node that takes defeat and all link assignment between MR-BS.
The method of judging described communication quality is the same, repeats no more.
Further be illustrated with several examples of application below.
This several examples of application all describes with a kind of topological structure in the MMR network, and as shown in Figure 3, MS is one three MS that jumps, and communication is by nontransparent centralized RS1 and the transparent RS2 relaying that plays the data relaying action in communicating by letter between this MS and the MR-BS.MS can't carry out direct communication with MR-BS, and the signal between RS1 relaying RS2 and the MR-BS, the data-signal between RS2 relaying MS and the RS1, MS can directly be received the MAP message that RS1 sends.Selected herein example only is used for description and interpretation the present invention, and is not used in qualification the present invention.When practical application, RS at different levels can be transparent, also can be opaque;
When MR-BS will dispatch an ascending HARQ burst initial transmission, at first judge in N continuous ACK1/NAK1 signal of the RS1 feedback of receiving recently, whether the shared ratio of ACK1 signal is greater than threshold value P, if the access link high communication quality is described so, then give the transmission bandwidth of all the link assignment ascending HARQ bursts between MS and the MR-BS; Otherwise, illustrate that the access link communication quality is low, then at first only distribute ascending HARQ burst transfer bandwidth to access link.
In order to contrast, to introduce earlier below and be two kinds of detailed process of HARQ burst allocation transmission bandwidth in the prior art, this flow process is to carry out in the MMR of topological structure shown in Figure 3 network.Fig. 4 allocates the ascending HARQ flow chart of uplink burst transfer resource in advance to all links between MS and the MR-BS for MR-BS in the prior art.
In the flow process that Fig. 4 represents, tentation data propagation delay time be a frame, the processing delay of data is frames.In the time will dispatching the burst of ascending HARQ, MR-BS by UL MAP message to MS to RS2, RS2 to RS1 and RS1 to the link assignment ascending HARQ burst transfer bandwidth of MR-BS, UL MAP by the RS1 relaying to RS2 and MS.MS is after obtaining transmission bandwidth, send the ascending HARQ burst to RS2, RS2 receives and makes mistakes, in ACKCH region, feed back the NAK signal to RS1, after RS1 receives the NAK signal of RS2 feedback, to MS feedback NAK signal, in ACKCH region, feed back the NAK1 signal by HARQ ACK bitmap IE simultaneously to MR-BS.After MS receives the NAK1 signal of RS1 feedback, know the loading error occurring of ascending HARQ burst.
Below attach most importance to and spread journey:
MR-BS to MS to RS2, RS2 to RS1 and RS1 to the link assignment ascending HARQ of the MR-BS re-transmission bandwidth that happens suddenly.MS retransmits the re-transmission that happens suddenly on the bandwidth in the HARQ burst that distributes.RS2 receives the burst that retransmits burst and initially receive and merges, and deciphers, and decoding is correct, on pre-assigned resource the correct burst that receives is sent to RS1, gives RS1 feeding back ACK signal simultaneously.RS1 gives MS feeding back ACK signal after receiving that RS2 sends ack signal, gives MR-BS feeding back ACK 1 signal simultaneously.MR-BS receives the ACK1 signal, and it is correct to know that RS2 receives.RS1 receives the burst success that RS2 sends, and gives RS2 feeding back ACK signal, sends this correct burst and feeding back ACK signal that receives to MR-BS simultaneously on pre-assigned resource, and like this, RS2 knows that the burst of its transmission is correctly received by RS1.MR-BS knows that the ascending HARQ burst is correctly received by RS1 after receiving the ack signal of RS1 feedback.MR-BS correctly receives the HARQ burst that RS1 sends, and gives RS1 feeding back ACK signal.
From flow process shown in Figure 4 as can be seen, the pre-assigned transmission bandwidth of MR-BS is wasted because of taking defeat of access link.
Fig. 5 is in the prior art, does not all allocate the ascending HARQ flow chart of burst transfer bandwidth in advance to all links between MS and the MR-BS.In the flow process that Fig. 5 represents, the propagation delay time of tentation data is a frame, and the processing delay of data is frames.In the time will dispatching an ascending HARQ burst, to the link assignment ascending HARQ burst transfer bandwidth between MS and RS2, UL MAP is transmitted to MS by RS1 to MR-BS by UL MAP.After obtaining transmission bandwidth, MS sends the ascending HARQ burst to RS2, and RS2 takes defeat, to RS1 feedback NAK, RS1 feeds back NAK by HARQ ACK Bitmap IE to MS after receiving the NAK signal of RS2 feedback, feeds back NAK1 to MR-BS simultaneously in ACKCH region.MS receives the NAK signal of RS1 feedback, knows the uplink burst bust this.MR-BS knows that RS2 takes defeat behind the NAK1 signal that receives the RS1 transmission, then distribute MS to retransmit bandwidth to the uplink burst of RS2, and MS carries out the re-transmission of this ascending HARQ burst on the re-transmission bandwidth of distributing.RS2 receives that the HARQ burst of re-transmission and paid-in HARQ burst merge, and deciphers, and RS2 successfully receives, and gives RS1 feeding back ACK signal.RS1 receives the ack signal of RS2 feedback, gives the MS feeding back ACK, gives MR-BS feeding back ACK 1 signal.MR-BS knows that burst is correctly received by RS2 after receiving the ACK1 signal of RS1 feedback, then the transmission bandwidth that happens suddenly to RS2 this ascending HARQ of link assignment to RS1 and RS1 to MR-BS.RS2 sends this correct HARQ burst that receives to RS1 on the bandwidth of distributing, RS1 successfully receives, and gives RS2 feeding back ACK signal, sends correct burst and the feeding back ACK signal that receives to MR-BS simultaneously on pre-assigned bandwidth.MR-BS receives the ack signal of RS1 feedback, knows that burst is correctly received by RS1, and the burst that MR-BS receives the RS1 transmission is correct, gives RS1 feeding back ACK signal.
In flow process shown in Figure 5, the waste of resource decreases than flow process shown in Figure 4, but ascending HARQ burst transfer time delay increases.
Fig. 6 be in the inventive method MR-BS according to the situation of access link determine whether carrying out to the link between MS and the MR-BS allocate in advance transfer resource ascending HARQ embodiment schematic flow sheet.The propagation delay time of tentation data is a frame, and the processing delay of data is frames.
Suppose ascending HARQ burst of MR-BS scheduling, obtain following judgement: in the N that receives recently continuous ACK1/NAK1 feedback signal, the shared ratio of ACK1 is lower than threshold values P.Explanation is in communication process, and the HARQ burst that MS sends is lower by the correct probability that receives of RS2, and the access link communication quality is low; Therefore MR-BS selects second kind of method of salary distribution, and promptly only to the access link allocation of transmission bandwidth between MS and RS2, MS sends the ascending HARQ burst to RS2 after obtaining transmission bandwidth, and RS2 judges whether reception is correct.RS2 takes defeat, to RS1 feedback NAK signal.RS1 receives the NAK signal of RS2 feedback, to MS feedback NAK signal, simultaneously to MR-BS feedback NAK1 signal.After MS receives the NAK signal of RS1 feedback, know its ascending HARQ burst transfer failure.MR-BS knows that RS2 receives the ascending HARQ burst failure after receiving RS1 feedback NAK1 signal.
At this moment, MR-BS need retransmit resource for this ascending HARQ burst allocation, and will be for preparing the first transfer resource of ascending HARQ burst allocation of first transmission, at first judge the situation of access link, at this moment, ACK1 signal shared ratio in N ACK1/NAK1 signal of RS1 feedback surpasses predetermined threshold value P, so MR-BS distribute MS to RS2, RS2 to RS1, RS1 is to the ascending HARQ burst transfer resource and the re-transmission resource of MR-BS link.Following transmitting step carries out according to step shown in Figure 4; Retransmissions steps is undertaken by the re-transmission flow process among Fig. 4.
In flow process shown in Figure 6, under the situation that does not increase time delay, reduced the waste of resource to a certain extent.
Fig. 7 is that MR-BS and RS1 receive ascending HARQ embodiment schematic flow sheet under the initial transmission failure scenarios among the present invention, and in flow process shown in Figure 7, the propagation delay time of tentation data is a frame, and the processing delay of data is frames.This embodiment is with MR-BS quality according to access link in first transmission and when retransmitting; select to adopt above-mentioned first kind of mode to carry out the distribution of transmission bandwidth; be that example describes to mobile station MS to all the link assignment transfer resources on the path of MR-BS in advance promptly, when first transmission, adopt certainly the second way distribute bandwidth-MR-BS do not allocate in advance RS2 to RS1 and RS1 to the transfer resource between the MR-BS---also belong to protection scope of the present invention.
At first MR-BS gives all the link assignment resources between MS and the MR-BS, the ascending HARQ that RS2 receives the MS transmission happens suddenly successfully, and this burst is sent to RS1 on pre-assigned resource, gives RS1 feeding back ACK signal simultaneously, after RS1 receives the ack signal of RS2 transmission, give MS feeding back ACK signal.RS1 takes defeat, to MR-BS feedback NAK signal, and to RS2 feedback NAK signal.MR-BS receives the NAK signal that RS1 sends, know that RS1 receives the burst failure of RS2, be bust this on the intermediate line link this moment, when therefore retransmitting allocated bandwidth, retransmit bandwidth for the next stage node of the node that takes defeat and all link assignment between MR-BS, retransmit bandwidth promptly for the link assignment ascending HARQ burst between RS2 and RS1, and retransmit bandwidth for the link assignment ascending HARQ burst between RS1 and MR-BS.RS2 is on the bandwidth of distributing, the correct burst that receives is sent to RS1, RS1 merges burst that received originally and the burst that newly receives, decipher, the correct MR-BS feeding back ACK signal of giving of decoding, give RS2 feeding back ACK signal, and the burst that correctly receives is sent to MR-BS on pre-assigned bandwidth.MR-BS receives mistake, to RS1 feedback NAK, still be bust this on the intermediate line link this moment, when therefore retransmitting allocated bandwidth, retransmit bandwidth for the next stage node of the node that takes defeat and all link assignment between MR-BS, promptly and to the link assignment between RS1 and MR-BS retransmit bandwidth.RS1 sends to MR-BS to burst on the bandwidth of distributing.After MR-BS decoding is correct, give the RS1 feeding back ACK.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (3)
1. be the method for the first transmission bandwidth of up mixed automatic retransmission request HARQ burst allocation in the multi-hop relay network, comprise:
When the high communication quality of access link, it be the first transmission bandwidth of each HARQ burst allocation that multi-hop base station MR-BS selects first kind of allocated bandwidth mode, is the first transmission bandwidth of each HARQ burst allocation otherwise then select second kind of allocated bandwidth mode; Wherein,
Described first kind of allocated bandwidth mode: be the required bandwidth of this HARQ burst transfer of all link assignment;
Described second kind of allocated bandwidth mode: MR-BS is the access link allocation of transmission bandwidth earlier; After receiving that the relay station RS adjacent with MS receives the feedback signal of uplink burst success, MR-BS is the repeated link allocation of transmission bandwidth again;
Wherein, MR-BS judges that the method for described communication quality is:
Jump MS for m, N the continuous affirmation ACKm-2/ failure NAKm-2 feedback signal that the MR-BS record is received recently is if the shared ratio of ACKm-2, is just thought the high communication quality of access link greater than predetermined threshold value P; Otherwise think that the communication quality of access link is low; Described P is greater than 0.5 and less than 1;
Described affirmation ACKm-2/ failure NAKm-2 feedback signal is fed back to MR-BS according to the reception condition of uplink burst by the RS adjacent with MR-BS: if in up HARQ burst transfer process, the ascending HARQ burst of access link takes defeat, so, adjacent with MR-BS RS is then to MR-BS feedback NAKm-2 signal; If the burst of the ascending HARQ of access link receives successfully, then adjacent with MR-BS RS is to MR-BS feeding back ACK m-2 signal.
2. the method for claim 1 is characterized in that: a relay station RS receives HARQ according to this node and happen suddenly successfully/fail, and understands respective feedback ACK/NAK signal to even higher level of node;
After a relay station RS receives the ACKn/NAKn signal, then can be corresponding to its even higher level of node feeding back ACK n+1/NAKn+1 signal.
3. the method for claim 1 is characterized in that: carrying out adopting the mode of acquiescence that allocated bandwidth is carried out in the transmission of burst before the first time, the allocated bandwidth mode was selected; The mode of described acquiescence can be selected in the above-mentioned dual mode any according to actual conditions.
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| CN101807983B (en) * | 2009-02-13 | 2013-10-16 | 中兴通讯股份有限公司 | Method and system for overcoming confliction between uplink hybrid automatic retransmission request and burst traffic |
| CN101909286B (en) * | 2009-06-03 | 2013-03-27 | 普天信息技术研究院有限公司 | Cooperative communication method of relay network, multi-hop base station and relays |
| CN102577267B (en) * | 2009-09-16 | 2014-12-24 | 株式会社日立制作所 | Communication apparatus and communication system for enhancing speed of communications between terminals |
| EP2833692A4 (en) * | 2012-04-23 | 2015-09-30 | Huawei Tech Co Ltd | Method, base station, and system for data transmission |
| CN105471763B (en) | 2014-09-04 | 2020-09-15 | 中兴通讯股份有限公司 | Control message transmission method and device |
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| IEEE P802.16j Task Group.Definition of terminology used in Mobile Multihop Relay.《IEEE C802.16j-06_019》.2006,1-9. * |
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