CN101170342A - Radio relay system and method for realizing downlink data transmission and relay base station - Google Patents
Radio relay system and method for realizing downlink data transmission and relay base station Download PDFInfo
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- CN101170342A CN101170342A CNA2006101506711A CN200610150671A CN101170342A CN 101170342 A CN101170342 A CN 101170342A CN A2006101506711 A CNA2006101506711 A CN A2006101506711A CN 200610150671 A CN200610150671 A CN 200610150671A CN 101170342 A CN101170342 A CN 101170342A
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Abstract
The invention discloses a wireless relay system, a method thereof and a relay base station realizing downlink data transmission. The method comprises the steps of transmitting a current information position mark to a mobile terminal MS before switching, and transmitting the downlink data to the MS according to the current information position mark fed back by the MS after switching, the invention ensures the continuity of downlink data transmission when a relay system needs to be switched, and the downlink still has downlink data transmission.
Description
Technical field
The present invention relates to the data transmission technology in the mobile communication, particularly a kind of wireless relay system and a kind of wireless relay system realize downlink data transmitting method and relay base station.
Background technology
As everyone knows, the radio wave frequency is high more, and is fast more with the speed of range attenuation.It is very limited that this specific character of radio wave has caused being operated in the coverage of mobile communication base station of high frequency band.Therefore, the appearance of wireless relay system has effectively solved this problem.In wireless relay system, relay base station (RS) communicates by air interface and BS, and transmits the data of terminal.Under identical systematic function requires,, build and safeguard that the complexity of RS and cost are all much smaller than traditional BS, and can be laid apace as the coverage of system and throughput etc.Therefore, use RS, can improve the performance of wireless system significantly with lower cost.
Fig. 1 is the topological structure schematic diagram of wireless relay system, in Fig. 1:
Solid line is represented single user data link, and dotted line is represented the broadcast link;
Support that the base station (MMR-BS) of mobile multi-hop relaying is the base station that can support relay base station;
RS1, RS2 and RS3 are high ability relay base station, can send synchronous head and resource allocation broadcast separately, possess resource allocation;
Rs1, rs2 and rs3 are low ability relay base station, can not send synchronous head and resource allocation broadcast separately, do not possess resource allocation;
MS1, MS2, MS3 and MS4 are portable terminals;
The synchronizing station of MS1 is RS1, and access station is rs1; Synchronizing station and the access station of MS4 are RS3; The synchronizing station of rs3 is MMR-BS, and access station is rs2; Synchronizing station and the access station of RS3 are RS2.
MS or RS and synchronizing station keep synchronously, and read broadcast from synchronizing station.Synchronizing station can be BS, MMR-BS or high ability RS.Access station is the website that Network Access Point directly is provided to RS or MS, and access station can be BS, MMR-BS or RS.
In relay system, when MS or RS switch, still there is transfer of data in the down link of MS or RS, the reception data of MS or RS have continuity before and after then needing to guarantee to switch, not packet loss and do not have duplicate packages.But there is not solution of the above problems in the existing wireless relay system downlink data transmission technology.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of wireless relay system to realize downlink data transmitting method.
Another object of the present invention is to provide a kind of wireless relay system.
Another purpose of the present invention is to provide a kind of relay base station.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of wireless relay system and realize downlink data transmitting method, this method may further comprise the steps:
A, before switching node switches, the downlink transfer Control Node sends the current information position mark to mobile terminal MS before switching;
B, after switching node is finished switching, described MS sends to described current information position mark and switches back downlink transfer Control Node;
The downlink transfer Control Node continues to send downlink data to described MS according to the position of described current information position mark indication after C, the described switching.
In the said method, described switching node is MS or relay base station RS; The downlink transfer Control Node is to support the base station MMR-BS or the high ability RS of mobile multi-hop relaying before the described switching; The described back downlink transfer Control Node of switching is to support the base station MMR-BS or the high ability RS of mobile multi-hop relaying.
In the said method, when having an above RS in the link between downlink transfer Control Node before the described switching and the described MS, the method that sends the current information position mark described in the steps A is: the downlink transfer Control Node is by the described current information position mark of transparent transmission step by step of the RS in the described link, until arriving described MS before the described switching.
In the said method, when having an above RS in described MS and the described link that switches between the downlink transfer Control Node of back, the method that sends described in the step B is: described MS is by the described current information position mark of transparent transmission step by step of the RS in the described link, until arriving described switchings downlink transfer Control Node afterwards; The method that sends downlink data described in the step C is: the described back downlink transfer Control Node of switching is by the described downlink data of transparent transmission step by step of the RS in the described link, until arriving described MS.
Said method before the current information position mark transparent transmission of each RS in described link with described MS transmission, further comprises: the synchronizing station of described RS is used in the bandwidth that sends upstream message for this RS divides.
Described synchronizing station is that described RS distributes the method for bandwidth to be: the synchronizing station of described RS is used in the bandwidth that sends upstream message for this RS divides in the uplink resource allocation broadcast that sends to described RS.
Said method further comprised before described step B: the synchronizing station of described MS is used in the bandwidth that sends upstream message for this MS divides.
Described synchronizing station is that described MS distributes the method for bandwidth to be: the synchronizing station of described MS is used in the bandwidth that sends upstream message for this MS divides in the uplink resource allocation broadcast that sends to described MS.
In the said method, the position mark of current information described in the steps A is: the SDU SN that comprises Service Data Unit sequence number SDU SN expands sub-head; The position mark of current information described in the step B is: the SN report MAC head that comprises SDUSN.
In the said method, when described switching node is high ability RS, and follow this switching node when switching simultaneously by an above MS of described switching node service, the method of the described transmission of step B is: described each MS sends to described switching node with current information position mark separately earlier, by described switching node the current information position mark of receiving is merged processing then, generate a new message, send to described switching back downlink transfer Control Node again.
In the said method, when having an above RS in described switching node RS and the described link that switches between the downlink transfer Control Node of back, described switching node sends to the described method of switching back downlink transfer Control Node through the new information that merge to handle generates and is described: transparent transmission is described step by step handles the new information that generates through merging, downlink transfer Control Node after arriving described switchings by RS in the described link for described switching node.
Said method further comprises in described steps A: described MS to described switching before the current information position mark that sends of downlink transfer Control Node carry out update calculation; In described step B, described MS sends to described switching back downlink transfer Control Node with described current information position mark through update calculation.
The invention discloses a kind of wireless relay system, this system comprises:
Switching node before switching, receives the current information position mark that the downlink transfer Control Node sends before switching; After finishing switching, described current information position mark is sent to switching back downlink transfer Control Node, and receive the described downlink data that back downlink transfer Control Node sends that switches;
Switch preceding downlink transfer Control Node, be used for the node of link control downlink transfer before described switching node switches, before described switching node switches, send described current information position mark to described switching node;
Switch back downlink transfer Control Node, be used for switching the node of back link control downlink transfer at described switching node, after described switching node is finished switching, receive the current information position mark that described switching node sends, and continue to send downlink data to described switching node according to the position of described current information position mark indication.
In the said system, described switching node is MS or relay base station RS; The downlink transfer Control Node is to support the base station MMR-BS or the high ability RS of mobile multi-hop relaying before the described switching; The described back downlink transfer Control Node of switching is to support the base station MMR-BS or the high ability RS of mobile multi-hop relaying.
Said system, in the link before described switching between downlink transfer Control Node and the described switching node, further comprise an above RS, be used for the current information position mark that downlink transfer Control Node before the described switching sends is passed through described switching node step by step.
Said system, in the described link that switches between back downlink transfer Control Node and the described switching node, further comprise an above RS, be used for the current information position mark that described switching node sends is passed through described switching back downlink transfer Control Node step by step, and the described downlink data that switches back downlink transfer Control Node transmission is passed through described switching node step by step.
In the said system, when described switching node was MS, this switching node further was achieved as follows described function:
Before switching, described switching node to described switching before the current information position mark that sends of downlink transfer Control Node carry out update calculation;
After finishing switching, described switching node will send to described switching back downlink transfer Control Node through the current information position mark of update calculation.
The invention also discloses a kind of relay base station RS, when an above MS by this RS service followed this RS and switches simultaneously, this RS was achieved as follows described function:
RS is before switching, and the current information position mark that downlink transfer Control Node before switching is sent is transmitted to the MS that is served by this RS;
RS receives the current information position mark that MS sent by this RS service after finishing switching, and the current information position mark of receiving is merged processing, generates new message, sends to switch back downlink transfer Control Node again.
Described RS comprises at least with lower unit:
Descending forwarding control unit is used for the current information position mark that downlink transfer Control Node before the described switching sends is transmitted to the MS that is served by this RS;
Merge processing unit, be used to receive current information position mark, and merge processing, generate new message by the MS transmission of described RS service;
The forwarded upstream control unit is used for the new information that described merging processing unit generates is sent to described switching back downlink transfer Control Node.
Therefore, downlink data transmission method and a kind of relay base station in a kind of wireless relay switched system provided by the invention and the realization handoff procedure thereof, have the following advantages: the current information position mark is transmitted by the RS in the link and in proper order by the scheme of MS assisted memory current information position mark, make in the wireless relay system handoff procedure continuity of downlink transmission data before and after still guaranteeing to switch.
Description of drawings
Fig. 1 is the topological structure schematic diagram of wireless relay system;
Fig. 2 is the scene schematic diagram when MS carries out the minizone switching in the wireless relay system;
Fig. 3 is the transfer process figure of downlink data in the scene shown in Figure 2;
Fig. 4 is that MS carries out the scene schematic diagram of intra-cell when changing in the wireless relay system;
Fig. 5 is the transfer process figure of downlink data in the scene shown in Figure 4;
Fig. 6 is RS and carry out the scene schematic diagram of minizone when switching by the MS integral body of this RS service in the wireless relay system;
Fig. 7 is the transfer process figure of downlink data in the scene shown in Figure 6.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing preferred embodiment that develops simultaneously, the present invention is described in more detail.
Some professional terms that description below at first introducing relates to are so that make description clearer.
Switching node: the node that switches in the junction network can be MS or RS;
The switching controls node: having the node of the handoff request that initiation initiates the handoff procedure of switching node or response switching node, can be MMR-BS or high ability RS;
Downlink transfer Control Node before switching: the node of control downlink transfer in the link before switching node switches, its function comprise to MS and send SDU SN expansion head, downlink data carried out buffer memory when switching node switches, finish when switching downlink transfer Control Node after sending data in buffer to switching when switching node.The downlink transfer Control Node can be identical with the switching controls node before switching.
Switch back downlink transfer Control Node: switching node switches the node of control downlink transfer in the link of back, its function comprise receive switch before the downlink transfer Control Node send data cached, handle SDU SN message, the switching node after switching that switching node sends and send new data.Identical when taking place to switch back downlink transfer Control Node when intra-cell is changed and switching preceding downlink transfer Control Node.
Fig. 2 is that MS carries out the scene schematic diagram that switch the minizone in the wireless relay system, as shown in Figure 2, switching node is that the downlink transfer Control Node is that the downlink transfer Control Node is that target MMR-BS, switching controls node are for serving MMR-BS after service MMR-BS, the switching before MS, the switching.MS switches to the sub-district that target MMR-BS is covered from the sub-district that service MMR-BS covers.And there are high ability relay base station RS1 and RS2 in the link in two sub-districts between MS and MMR-BS and the MMR-BS respectively.
Here, the cell range that MMR-BS covered is meant the common zone that covers of all RS of this MMR-BS and its service.In scene shown in Figure 2, MMR-BS is different with target MMR-BS in service, therefore claims the minizone that switches to shown in Figure 2 to switch.The difference of the switching of junction network and the switching of non-junction network is: junction network is before switching or after switching, has a RS in the link between MS and the MMR-BS at least, but not junction network does not all have RS before switching and after switching in the link between MS and the BS.
Fig. 3 is the transfer process figure of downlink data in the scene shown in Figure 2, at first initiates handoff request by MS to RS1, the handoff request of service MMR-BS response MS; Or directly initiate to switch by service MMR-BS.If this moment, service MMR-BS still has downlink data to send to MS, then in order to guarantee to switch the continuity of the front and back downlink data that MS received, carries out step as shown in Figure 3:
Step 301, service MMR-BS sends SDU SN to MS and expands sub-head.
With before target access station RS2 communicates by letter, service MMR-BS sends a current information position mark, the position that is used for writing down information that current down link sends to MS at least at MS.
In the present embodiment, the current information position mark is Service Data Unit sequence number SDU SN, and SDUSN is included in the SDU SN expansion head.SDU SN expansion head is included in service MMR-BS in the protocol Data Unit (PDU) that MS sends, and the SDU SN that comprises in the SDU SN expansion head is the sequence number of last SDU among the current PDU that receives of MS.
Service MMR-BS is to per 2 of the MS transmission
pHave at least a PDU to comprise SDUSN among the individual PDU and expand sub-head.P is specified by wireless relay system, does not go through here.
MS carries out update calculation to the current information position mark that receives, its concrete computational methods are: when MS receives a PDU who comprises SDU SN expansion head, Service Data Unit sequence number SDU SN in the storage SDU SN expansion head, when receiving a PDU who does not comprise SDU SN expansion head, to each SDU among the PDU, carry out Service Data Unit sequence number SDU SN and add one operation, thereby write down the sequence number of current reception data in real time.
Owing to have high ability RS1 between service MMR-BS and the MS, therefore, the SDU SN that service MMR-BS at first will comprise the current information position mark expands sub-hair and gives RS1, passes through MS by RS1 again.Transparent transmission is meant that RS only carries out physical layer process to the message that receives, and transmits then, and does not change the MAC layer of message and more high-rise content.
Step 302 is finished switching at MS, inserts again after the junction network, and the synchronizing station RS2 of MS sends UL_MAP to MS, is used in the uplink bandwidth that sends SN report MAC head for MS divides in UL_MAP.
Step 303 sends SN report MAC head to synchronizing station RS2 in the bandwidth that MS is assigned in step 302.
Comprise the current information position mark SDU SN that sends and undertaken update calculation by transmission Control Node service MMR-BS before switching in the SN report MAC head by MS.
If also have other low ability RS in the link between MS and its synchronizing station, then SN report MAC head is at first received by low ability RS, is transparent to the synchronizing station of MS then step by step.Not low ability RS between MS and its synchronizing station RS2 in the present embodiment, so SN report MAC head is directly received by RS2.
Step 304, RS2 reports that with SN the MAC overhead pass is to target MMR-BS after receiving SN report MAC head.
Switch back downlink transfer Control Node if the synchronizing station of MS is, then do not need to continue to upload; If also have other high ability or low ability RS between the synchronizing station of MS and the switching back downlink transfer Control Node, then need to report that with SN the MAC head carries out transparent transmission step by step, till downlink transfer Control Node after the arrival switching.
In the present embodiment, the downlink transfer Control Node is target MMR-BS, and does not have RS between synchronizing station RS2 and the target MMR-BS, so RS2 directly reports SN that the MAC hair gives target MMR-BS.
Step 305, target MMR-BS continues to send downlink data to MS according to the position that the current information position mark SDU SN in the SN report MAC head shows.
Target MMR-BS at first sends to RS2 with downlink data, and RS2 passes through MS with downlink data again.
By above-mentioned steps, guaranteed in the scene shown in Figure 2 the continuity of downlink transmission data
Fig. 4 is that MS carries out the scene schematic diagram that intra-cell is changed in the wireless relay system, as shown in Figure 4, switching node is MS, switch before and switch after the downlink transfer Control Node be service/target MMR-BS, the switching controls node is RS1.MS is in the sub-district that service/target MMR-BS covers, and the scope that is covered by RS1 switches to the scope that RS2 covers.Service MMR-BS and target MMR-BS are same base station in this scene, therefore are referred to as intra-cell and change.
Fig. 5 is the transfer process figure of downlink data in the scene shown in Figure 4, at first initiates handoff request by MS to RS1, the handoff request of RS1 response MS; Or directly initiate to switch by RS1.If this moment, switching controls node R S1 still had downlink data to send to MS, then carry out step shown in Figure 5:
Step 501, service/target MMR-BS sends SDU SN to MS and expands sub-head.
With before target access station RS2 communicates by letter, service/target MMR-BS sends a current information position mark SDU SN to MS at least at MS.SDU SN is included in the SDU SN expansion head.MS carries out update calculation to the current information position mark that receives, and computational methods are with described in the step 301.
Step 502 is finished switching at MS, inserts again after the wireless relay network, and the synchronizing station RS2 of MS sends UL_MAP to MS, is used in the uplink bandwidth that sends SN report MAC head for MS divides in UL_MAP.
Step 503 sends SN report MAC head to synchronizing station RS2 in the bandwidth that MS is assigned in step 502.
Comprise in the SN report MAC head by downlink transfer Control Node service/target MMR-BS transmission before switching and by the current information position mark SDU SN of MS update calculation.
Step 504 after RS2 receives SN report MAC head, reports that with SN the MAC overhead pass is to switching back downlink transfer Control Node service/target MMR-BS.
Step 505, service/target MMR-BS continues to send downlink data to MS according to the shown position of current information position mark SDU SN in the SN report MAC head.
Service/target MMR-BS at first sends to RS2 with downlink data, and RS2 passes through MS with downlink data again.
Under some special situations, switching node is high ability RS, and RS and can integral body be moved by the MS of this RS service.Among the present invention, the MS that is served by switching node RS is meant by this RS access network, and follows the MS that leaves the line data transmission when this RS switches simultaneously.Such as RS and the situation that all is positioned at mobile places such as train, steamer by the MS of this RS service.
Fig. 6 has provided RS in the wireless relay system and has carried out the scene schematic diagram of minizone when switching by the MS integral body of this RS service, as shown in Figure 6, switching node is that the downlink transfer Control Node is that service MMR-BS, switching back downlink transfer Control Node are that target MMR-BS, switching controls node are service MMR-BS before high ability RS0, the switching.RS0 switches to the sub-district that target MMR-BS covers by the sub-district that service MMR-BS covers.Have high ability RS1 in the link between RS0 and the service MMR-BS, and have high ability RS2 in the link between the target MMR-BS, and hypothesis RS0 serves two mobile terminal MSs 1 and MS2.
Fig. 7 is the transfer process figure of downlink data in the scene shown in Figure 6, at first initiates handoff request by RS0 to service MMR-BS, the handoff request of service MMR-BS response RS0; Or directly initiate to switch by service MMR-BS.If this moment, service MMR-BS still continues to send downlink data to MS1 and MS2, in order to keep switching the continuity of the front and back downlink data that MS1 and MS2 received, carries out step as shown in Figure 7:
Step 701, service MMR-BS sends SDU SN to MS1, MS2 and expands sub-head.
With before target access station RS2 communicates by letter, service MMR-BS sends the current information position mark one time at least to MS1 and the MS2 by the RS0 service at RS0.
In the present embodiment, the current information position mark is SDU SN, and SDU SN is included in the SDU SN expansion head.Service MMR-BS at first expands sub-hair with SDU SN and gives RS1, and RS1 passes through RS0 again, and the descending forwarding control unit of RS0 will be passed to MS1 and MS2 under the SDU SN expansion head that receive again.
MS1 and MS2 carry out update calculation to the current information position mark that receives respectively, and computational methods are with described in the step 301.
Step 702, switching node RS0 and finish junction network by the MS1 of RS0 service and MS2 and switch, again insert after the junction network, RS0 sends UL_MAP to MS1 and MS2 respectively, is that MS1 and MS2 divide the uplink bandwidth that is used in transmission SN report MAC head in UL_MAP.
Step 703 in the bandwidth that MS1 and MS2 are assigned to respectively, sends SN report MAC head to synchronizing station RS0 in step 702.
Comprise in the SN report MAC head by downlink transfer Control Node service MMR-BS before switching and send and by the current information position mark SDU SN of MS update calculation.
Step 704, the synchronizing station RS2 of RS0 sends UL_MAP to RS0, is used in the bandwidth that sends the SN report message for RS0 divides in UL_MAP.
Step 705, RS0 merges MS1 and MS2 in step 703 to the SN of its transmission report MAC head, generate a SN report message, is uploaded to RS2 in the bandwidth that is assigned in step 704.
Wherein, SN report MAC head is merged, what generate a SN report message is the merging processing unit of RS0; What newly-generated SN report message was uploaded to RS2 is the forwarded upstream control unit of RS0.
Comprise in the SN report message that merges and follow switching node RS switching, and can feed back the number of the MS of SDUSN, and the connection identifier of each MS; The SN report message also comprises the number that is connected that can feed back SDU SN of following between each MS that RS switches and the target MMR-BS, and the current information position mark SDU SN in each connection.
Table 1 is a kind of concrete data format of SN report message, and is as shown in table 1:
| Grammer | Size | Explanation |
| SN report message () | Expression SN report message begins | |
| Type of message | 8 bits | Can be untapped any one numbering in the 802.16e agreement |
| The number n of MS | 4 bits | Follow switching node RS and switch, and feed back the number of the MS of SDU SN to switching back transmission Control Node |
| For(i＝0；i＜n；i++) | N MS is described successively | |
| { | Beginning to the description of i MS | |
| MS connects identifier substantially | 16 bits | The basic connection identifier of i MS |
| Connect number m | 4 bits | I can be fed back SDU between MS and target MMR-BS |
| The connection number of SN | ||
| For(j＝0；j＜m；j++) | M connection is described successively | |
| { | Beginning to j description that connects | |
| SDU?SN | 6 bits | J current information position mark that connects can be the lowest bit position of automatic repetitive requests piece sequence number, or the SN of MAC SDU be according to Business Stream identifier ascending sort |
| } | J description that connects finished | |
| } | Description to i MS finishes | |
| If (less than the border of byte) | If the shared bit number of above content is not the integral multiple of 8 bits, the operation below then carrying out | |
| { | The beginning filling | |
| Filling bit | ||
| 2,4 or 6 bits | Fill the filler of 2,4 or 6 bits, the bit number that makes whole SN report message is the integral multiple of 8 bits | |
| } | Filling bit finishes |
The data format of table 1.SN report message
Switching node RS merges processing with the current information position mark that a plurality of MS send, and forms a new message, and then is uploaded to the effective rate of utilization that the technical scheme of switching back downlink transfer Control Node has improved link.
Step 706, RS2 is uploaded to target MMR-BS with the SN report message that receives.
Step 707, target MMR-BS continues to send downlink data to MS1 and MS2 according to the current information position mark SDU SN of MS1 and MS2 in the SN report message.
Target MMR-BS at first sends to RS2 with the downlink data of MS1 and MS2 in the present embodiment, and RS2 passes through RS0, and RS0 sends to downlink data MS1 and MS2 again.
Wireless relay switched system of the present invention comprises at least, downlink transfer Control Node and switching back downlink transfer Control Node before switching node, the switching.Wherein, switching node is MS or relay base station RS; The downlink transfer Control Node is to support the base station MMR-BS or the high ability RS of mobile multi-hop relaying before switching; Switching back downlink transfer Control Node is to support the base station MMR-BS or the high ability RS of mobile multi-hop relaying.
Wireless relay switched system of the present invention realizes that downlink data transmitting method is: before switching node switched, the downlink transfer Control Node sent the current information position mark to mobile terminal MS before switching; After switching node was finished switching, MS sent to the current information position mark and switches back downlink transfer Control Node; Switching back downlink transfer Control Node continues to send downlink data to MS according to the position of current information position mark indication.
Wireless relay switched system of the present invention can also comprise several RS, these RS be distributed in MS and switch before and switch in the link between the downlink transfer Control Node of back, and step by step transparent transmission MS with switch before and switch between the downlink transfer Control Node of back the message of transmission mutually.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (19)
1. a wireless relay system realizes downlink data transmitting method, it is characterized in that this method may further comprise the steps:
A, before switching node switches, the downlink transfer Control Node sends the current information position mark to mobile terminal MS before switching;
B, after switching node is finished switching, described MS sends to described current information position mark and switches back downlink transfer Control Node;
The downlink transfer Control Node continues to send downlink data to described MS according to the position of described current information position mark indication after C, the described switching.
2. the method for claim 1 is characterized in that, described switching node is MS or relay base station RS; The downlink transfer Control Node is to support the base station MMR-BS or the high ability RS of mobile multi-hop relaying before the described switching; The described back downlink transfer Control Node of switching is to support the base station MMR-BS or the high ability RS of mobile multi-hop relaying.
3. method as claimed in claim 2, it is characterized in that, when having an above RS in the link between downlink transfer Control Node before the described switching and the described MS, the method that sends the current information position mark described in the steps A is: the downlink transfer Control Node is by the described current information position mark of transparent transmission step by step of the RS in the described link, until arriving described MS before the described switching.
4. method as claimed in claim 2, it is characterized in that, when having an above RS in described MS and the described link that switches between the downlink transfer Control Node of back, the method that sends described in the step B is: described MS is by the described current information position mark of transparent transmission step by step of the RS in the described link, until arriving described switchings downlink transfer Control Node afterwards.
5. method as claimed in claim 4 is characterized in that, the method that sends downlink data described in the step C is: the described back downlink transfer Control Node of switching is by the described downlink data of transparent transmission step by step of the RS in the described link, until arriving described MS.
6. method as claimed in claim 4 is characterized in that, before the current information position mark transparent transmission of each RS in the described link with described MS transmission, further comprises: the synchronizing station of described RS is used in the bandwidth that sends upstream message for this RS divides.
7. method as claimed in claim 6, it is characterized in that described synchronizing station is that described RS distributes the method for bandwidth to be: the synchronizing station of described RS is used in the bandwidth that sends upstream message for this RS divides in the uplink resource allocation broadcast that sends to described RS.
8. the method for claim 1 is characterized in that, further comprises before the described step B: the synchronizing station of described MS is used in the bandwidth that sends upstream message for this MS divides.
9. method as claimed in claim 8, it is characterized in that described synchronizing station is that described MS distributes the method for bandwidth to be: the synchronizing station of described MS is used in the bandwidth that sends upstream message for this MS divides in the uplink resource allocation broadcast that sends to described MS.
10. as each described method in the claim 1 to 9, it is characterized in that the position mark of current information described in the steps A is: the SDU SN that comprises Service Data Unit sequence number SDU SN expands sub-head; The position mark of current information described in the step B is: the SN report MAC head that comprises SDU SN.
11. the method for claim 1, its feature is being, when described switching node is high ability RS, and follow this switching node when switching simultaneously by an above MS of described switching node service, the method of the described transmission of step B is: described each MS sends to described switching node with current information position mark separately earlier, by described switching node the current information position mark of receiving is merged processing then, generate a new message, send to described switching back downlink transfer Control Node again.
12. method as claimed in claim 11, it is characterized in that, when having an above RS in described switching node RS and the described link that switches between the downlink transfer Control Node of back, described switching node sends to the described method of switching back downlink transfer Control Node through the new information that merge to handle generates and is described: transparent transmission is described step by step handles the new information that generates through merging, downlink transfer Control Node after arriving described switchings by RS in the described link for described switching node.
13. the method for claim 1 is characterized in that, further comprises in described steps A: described MS to described switching before the current information position mark that sends of downlink transfer Control Node carry out update calculation; In described step B, described MS sends to described switching back downlink transfer Control Node with described current information position mark through update calculation.
14. a wireless relay system is characterized in that, this system comprises:
Switching node before switching, receives the current information position mark that the downlink transfer Control Node sends before switching; After finishing switching, described current information position mark is sent to switching back downlink transfer Control Node, and receive the described downlink data that back downlink transfer Control Node sends that switches;
Switch preceding downlink transfer Control Node, be used for the node of link control downlink transfer before described switching node switches, before described switching node switches, send described current information position mark to described switching node;
Switch back downlink transfer Control Node, be used for switching the node of back link control downlink transfer at described switching node, after described switching node is finished switching, receive the current information position mark that described switching node sends, and continue to send downlink data to described switching node according to the position of described current information position mark indication.
15. system as claimed in claim 14 is characterized in that, described switching node is MS or relay base station RS; The downlink transfer Control Node is to support the base station MMR-BS or the high ability RS of mobile multi-hop relaying before the described switching; The described back downlink transfer Control Node of switching is to support the base station MMR-BS or the high ability RS of mobile multi-hop relaying.
16. system as claimed in claim 15, it is characterized in that, in the link before the described switching between downlink transfer Control Node and the described switching node, further comprise an above RS, be used for the current information position mark that downlink transfer Control Node before the described switching sends is passed through described switching node step by step.
17. system as claimed in claim 15, it is characterized in that, in the described link that switches between back downlink transfer Control Node and the described switching node, further comprise an above RS, be used for the current information position mark that described switching node sends is passed through described switching back downlink transfer Control Node step by step, and the described downlink data that switches back downlink transfer Control Node transmission is passed through described switching node step by step.
18., it is characterized in that when described switching node was MS, this switching node further was achieved as follows described function as claim 14,15,16 or 17 described systems:
Before switching, described switching node to described switching before the current information position mark that sends of downlink transfer Control Node carry out update calculation;
After finishing switching, described switching node will send to described switching back downlink transfer Control Node through the current information position mark of update calculation.
19. a relay base station RS is characterized in that, when an above MS by this RS service followed this RS and switches simultaneously, described RS comprised at least with lower unit:
Descending forwarding control unit is used for the current information position mark that downlink transfer Control Node before the described switching sends is transmitted to the MS that is served by this RS;
Merge processing unit, be used for after finishing switching, receive the current information position mark of the MS transmission of serving and merge processing, generate new message by described RS;
The forwarded upstream control unit is used for the new information that described merging processing unit generates is sent to described switching back downlink transfer Control Node.
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