CN102271371A - Method for selecting link based on Keep-alive mechanism and base station - Google Patents
Method for selecting link based on Keep-alive mechanism and base station Download PDFInfo
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- CN102271371A CN102271371A CN2010101892510A CN201010189251A CN102271371A CN 102271371 A CN102271371 A CN 102271371A CN 2010101892510 A CN2010101892510 A CN 2010101892510A CN 201010189251 A CN201010189251 A CN 201010189251A CN 102271371 A CN102271371 A CN 102271371A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 24
- 230000001934 delay Effects 0.000 claims abstract description 3
- 238000010586 diagram Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
Abstract
The invention discloses a method for selecting a link based on a Keep-alive mechanism and a base station. The method comprises steps of: when an R6 link and an R8 link are communicated simultaneously, calculating, by a service base station, the time delays of both the R6 link and the R8 link, wherein the R6 link is the link between the service base station or the target base station and an adjacent AGW (Access Gateway), and the R8 link is the link between the service base station and the target base station; comparing doubled time delay of the R6 link with the time delay of the R8 link; when the doubled time delay of the R6 link is greater than that of the R8 link, selecting the R8 link for the communication; otherwise, selecting the R6 link for the communication. According to the method for selecting the link based on the Keep-alive mechanism and the base station provided by the invention, the communication link is selected by comparing the time delay for switching the service base station to the target base station via the AGW with the time delay for directly switching the service base station to the target base station so that a rapid switching of an MS (Master Switch) between the base stations is realized.
Description
Technical field
The present invention relates to data communication field, specially refer to a kind of method and base station of carrying out link selection based on Keep-alive mechanism.
Background technology
With reference to Fig. 1, in the WiMAX network, there is terminal (Mobile Station, MS) 40, serving BS 20, target BS 30 and IAD (ASN GateWay, AGW) 10 wait each network element (Network Entities, NE), link between serving BS 20 or target BS 30 and the AGW is the R6 link, link between serving BS 20 and the target BS 30 is the R8 link, at present, when MS40 need be when serving BS 20 switches to target BS 30, because it is direct to the time delay that switches to target BS 30 by time delay and serving BS 20 that AGW10 switches to target BS 30 to compare serving BS 20, usually serving BS 20 directly promptly selects the R6 link to carry out communication by AGW10 to target BS 30, and sometimes serving BS 20 be directly switch to target BS 30 be the R8 link the time postpone a meeting or conference shorter, serving BS 20 has just lost and has selected the more chance of short path in this case, and can't realize the base station switching more quickly.
Summary of the invention
Main purpose of the present invention is carried out the method and the base station of link selection for providing a kind of based on Keep-alive mechanism, realizes the quick switching of MS between the base station.
The present invention proposes a kind ofly to carry out the method for link selection based on Keep-alive mechanism, comprises step:
When R6 link and R8 link are communicated with simultaneously, serving BS calculates R6 chain-circuit time delay and R8 chain-circuit time delay, described R6 link is the link between described serving BS or target BS and the neighboring access gateway A GW, and described R8 link is the link between described serving BS and the described target BS;
2 times and R8 chain-circuit time delay comparing the R6 chain-circuit time delay;
When 2 times of R6 chain-circuit time delay during, select the R8 link to carry out communication, otherwise select the R6 link to carry out communication greater than the R8 chain-circuit time delay.
Preferably, described serving BS calculating R6 chain-circuit time delay specifically comprises:
Described serving BS sends handshake information to described adjacent AGW, and receives the response message that described adjacent AGW sends, and described response message carries the timestamp of described adjacent AGW;
Contrast the current time of the timestamp and the local terminal clock of described response message, obtain the R6 chain-circuit time delay.
Preferably, the time delay of described serving BS calculating R8 link specifically comprises:
Described serving BS sends handshake information to described adjacent AGW, and receives the response message that described adjacent AGW sends, and described response message carries the timestamp of described adjacent AGW;
Contrast the current time of the timestamp and the local terminal clock of described response message, obtain the R8 chain-circuit time delay.
Preferably, the chain-circuit time delay between described serving BS and the described adjacent AGW equals the chain-circuit time delay between described target BS and the described adjacent AGW.
Preferably, described serving BS is selected R6 link or R8 link to carry out communication to be specially and to switch message mutual between described serving BS and described target BS.
The present invention also proposes a kind of base station, described base station is used for when R6 link and R8 link are communicated with simultaneously, calculate R6 chain-circuit time delay and R8 chain-circuit time delay, described R6 link is the link between described base station or target BS and the neighboring access gateway A GW, and described R8 link is the link between described base station and the described target BS; And 2 times and R8 chain-circuit time delay comparing the R6 chain-circuit time delay; And, select the R8 link to carry out communication, otherwise select the R6 link to carry out communication when 2 R6 chain-circuit time delays during greater than the R8 chain-circuit time delay.
Preferably, described base station specifically is used for:
Send handshake information to described adjacent AGW, and receive the response message that described adjacent AGW sends, described response message carries the timestamp of described adjacent AGW; And the current time that contrasts the timestamp and the local terminal clock of described response message, obtain described R6 chain-circuit time delay.
Preferably, described base station is further used for:
Send handshake information to described target BS, and receive the response message that described target BS sends, described response message carries the timestamp of described target BS; And the current time that contrasts the timestamp and the local terminal clock of described response message, obtain described R8 chain-circuit time delay.
Preferably, the chain-circuit time delay between described serving BS and the described adjacent AGW equals the chain-circuit time delay between described target BS and the described adjacent AGW.
Preferably, described base station be used for and described serving BS between switching message mutual.
A kind of method and base station of carrying out link selection based on Keep-alive mechanism that the present invention proposes, switch to the time delay of target BS and the time delay that serving BS is directly switch to target BS by comparing serving BS by AGW, selection is carried out communication by R6 link or R8 link, shorten the base station time delay for switching, realized the quick switching of MS between the base station.
Description of drawings
Fig. 1 is the structural representation of existing WiMAX network;
Fig. 2 the present invention is based on the method flow diagram of an embodiment that Keep-alive mechanism is carried out the method for link selection;
Fig. 3 the present invention is based on the method flow diagram of calculating R6 chain-circuit time delay of an embodiment that Keep-alive mechanism is carried out the method for link selection;
Fig. 4 the present invention is based on the method flow diagram of calculating R8 chain-circuit time delay of an embodiment that Keep-alive mechanism is carried out the method for link selection.
The realization of the object of the invention, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
A kind of method and base station of carrying out link selection based on Keep-alive mechanism that the present invention proposes, switch to the time delay of target BS and the time delay that serving BS is directly switch to target BS by comparing serving BS by AGW, select to carry out communication by R6 link or R8 link.
Keep-alive mechanism is a joint detection mechanism, be meant that a network element sends a Keep-Alive REQ message to the opposite end network element, if the opposite end network element is received this data, a Keep-Alive RSP of loopback message, affirmation Keep-Alive REQ message is received, is not disconnected to determine that these two network elements connect.
With reference to Fig. 2, propose to the present invention is based on the embodiment that Keep-alive mechanism is carried out the method for link selection, comprising:
Step 101, when R6 link and R8 link were communicated with simultaneously, serving BS calculated R6 chain-circuit time delay and R8 chain-circuit time delay, and this R6 link is the link between serving BS or target BS and the adjacent AGW, and this R8 link is the link between serving BS and the target BS;
Chain-circuit time delay between serving BS and the adjacent AGW equals the chain-circuit time delay between target BS and the adjacent AGW.
With reference to Fig. 3, step 101 specifically comprises:
Step 201, serving BS send handshake information to adjacent AGW, and receive the response message that adjacent AGW sends, and this response message carries the timestamp of adjacent AGW;
With reference to Fig. 4, step 101 also comprises:
Step 301, serving BS send handshake information to target BS, and the response message of receiving target base station transmission, and this response message carries the timestamp of target BS;
Step 302 contrasts the timestamp of response message and the current time of local terminal clock, obtains the time delay of R8 link.
Step 102, relatively 2 times of the R6 chain-circuit time delay and R8 chain-circuit time delay;
Step 103 when 2 times of R6 chain-circuit time delay during greater than the R8 chain-circuit time delay, is selected the R8 link to carry out communication, otherwise is selected the R6 link to carry out communication.
Above-mentioned serving BS is selected R6 link or R8 link to carry out communication to be specially and to switch mutual between serving BS and target BS of message such as HOReq message, HORsp message, HOConfirm message, HOComplete message and HOAck message.
A kind of method of carrying out link selection based on Keep-alive mechanism that the present invention proposes, switch to the time delay of target BS and the time delay that serving BS is directly switch to target BS by comparing serving BS by AGW, selection is carried out communication by R6 link or R8 link, shorten the base station time delay for switching, realized the fast base station switching.
The present invention also proposes a kind of base station, is used for calculating R6 chain-circuit time delay and R8 chain-circuit time delay when R6 link and R8 link are communicated with simultaneously, and the R6 link is the link between this base station or target BS and the adjacent AGW, and the R8 link is the link between this base station and the target BS; And 2 times and R8 chain-circuit time delay comparing the R6 chain-circuit time delay; And, select the R8 link to carry out communication, otherwise select the R6 link to carry out communication when 2 times of R6 chain-circuit time delay during greater than the R8 chain-circuit time delay.
Chain-circuit time delay between serving BS and the adjacent AGW equals the chain-circuit time delay between target BS and the adjacent AGW.
This base station specifically is used for:
Send handshake information to adjacent AGW, and receive the response message that adjacent AGW sends, this response message carries the timestamp of this adjacent AGW; And the current time that contrasts the timestamp and the local terminal clock of this response message, obtain the time delay of R6 link.
This base station is further used for:
Send handshake information to target BS, and the response message of receiving target base station transmission, this response message carries the timestamp of target BS; And the current time that contrasts the timestamp and the local terminal clock of this response message, obtain the time delay of R8 link.
This base station be used for and serving BS between switching message such as HOReq message, HORsp message, HOConfirm message, HOComplete message and HOAck message mutual.
A kind of base station that the present invention proposes, switch to the time delay of target BS and the time delay that this base station is directly switch to target BS by comparing this base station by AGW, selection is carried out communication by R6 link or R8 link, has shortened the base station time delay for switching, has realized the fast base station switching.
The above only is the preferred embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. one kind is carried out the method for link selection based on Keep-alive mechanism, it is characterized in that, comprises step:
When R6 link and R8 link are communicated with simultaneously, serving BS calculates R6 chain-circuit time delay and R8 chain-circuit time delay, described R6 link is the link between described serving BS or target BS and the neighboring access gateway A GW, and described R8 link is the link between described serving BS and the described target BS;
2 times and R8 chain-circuit time delay comparing the R6 chain-circuit time delay;
When 2 times of R6 chain-circuit time delay during, select the R8 link to carry out communication, otherwise select the R6 link to carry out communication greater than the R8 chain-circuit time delay.
2. as claimed in claim 1ly carry out the method for link selection, it is characterized in that described serving BS calculates the R6 chain-circuit time delay and specifically comprises based on Keep-alive mechanism:
Described serving BS sends handshake information to described adjacent AGW, and receives the response message that described adjacent AGW sends, and described response message carries the timestamp of described adjacent AGW;
Contrast the current time of the timestamp and the local terminal clock of described response message, obtain the R6 chain-circuit time delay.
3. as claimed in claim 1 or 2ly carry out the method for link selection, it is characterized in that the time delay that described serving BS calculates the R8 link specifically comprises based on Keep-alive mechanism:
Described serving BS sends handshake information to described adjacent AGW, and receives the response message that described adjacent AGW sends, and described response message carries the timestamp of described adjacent AGW;
Contrast the current time of the timestamp and the local terminal clock of described response message, obtain the R8 chain-circuit time delay.
4. as claimed in claim 1 or 2ly carry out the method for link selection, it is characterized in that the chain-circuit time delay between described serving BS and the described adjacent AGW equals the chain-circuit time delay between described target BS and the described adjacent AGW based on Keep-alive mechanism.
5. method of carrying out link selection based on Keep-alive mechanism as claimed in claim 1 or 2, it is characterized in that described serving BS is selected R6 link or R8 link to carry out communication to be specially and to switch message mutual between described serving BS and described target BS.
6. base station, it is characterized in that, described base station is used for when R6 link and R8 link are communicated with simultaneously, calculate R6 chain-circuit time delay and R8 chain-circuit time delay, described R6 link is the link between described base station or target BS and the neighboring access gateway A GW, and described R8 link is the link between described base station and the described target BS; And 2 times and R8 chain-circuit time delay comparing the R6 chain-circuit time delay; And, select the R8 link to carry out communication, otherwise select the R6 link to carry out communication when 2 R6 chain-circuit time delays during greater than the R8 chain-circuit time delay.
7. base station as claimed in claim 6 is characterized in that, described base station specifically is used for:
Send handshake information to described adjacent AGW, and receive the response message that described adjacent AGW sends, described response message carries the timestamp of described adjacent AGW; And the current time that contrasts the timestamp and the local terminal clock of described response message, obtain described R6 chain-circuit time delay.
8. as claim 6 or 7 described base stations, it is characterized in that described base station is further used for:
Send handshake information to described target BS, and receive the response message that described target BS sends, described response message carries the timestamp of described target BS; And the current time that contrasts the timestamp and the local terminal clock of described response message, obtain described R8 chain-circuit time delay.
9. as claim 6 or 7 described base stations, it is characterized in that the chain-circuit time delay between described serving BS and the described adjacent AGW equals the chain-circuit time delay between described target BS and the described adjacent AGW.
10. as claim 6 or 7 described base stations, it is characterized in that, described base station be used for and described serving BS between switching message mutual.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101892510A CN102271371A (en) | 2010-06-01 | 2010-06-01 | Method for selecting link based on Keep-alive mechanism and base station |
| PCT/CN2010/078565 WO2011150630A1 (en) | 2010-06-01 | 2010-11-09 | Method and base station for link selection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010101892510A CN102271371A (en) | 2010-06-01 | 2010-06-01 | Method for selecting link based on Keep-alive mechanism and base station |
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| CN102271371A true CN102271371A (en) | 2011-12-07 |
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| CN2010101892510A Pending CN102271371A (en) | 2010-06-01 | 2010-06-01 | Method for selecting link based on Keep-alive mechanism and base station |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1845636A (en) * | 2005-04-07 | 2006-10-11 | 华为技术有限公司 | Switching method based on distributed wireless access network |
| CN1848778A (en) * | 2005-04-04 | 2006-10-18 | 安捷伦科技有限公司 | Method of monitoring progress of a signalling message and network monitoring apparatus |
| CN101217593A (en) * | 2008-01-16 | 2008-07-09 | 中兴通讯股份有限公司 | A performance test device and method of signaling transmission network |
| WO2009067637A1 (en) * | 2007-11-21 | 2009-05-28 | Nortel Networks Limited | Computing an action time for allocation of resources to a mobile station that is handing over from a source to a target base station |
| CN101521920A (en) * | 2008-02-29 | 2009-09-02 | 中兴通讯股份有限公司 | Base station switching method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2345283A1 (en) * | 2008-09-19 | 2011-07-20 | Nokia Siemens Networks Oy | Network apparatus and method for transmitting a message to a target network apparatus in the wimax system |
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2010
- 2010-06-01 CN CN2010101892510A patent/CN102271371A/en active Pending
- 2010-11-09 WO PCT/CN2010/078565 patent/WO2011150630A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1848778A (en) * | 2005-04-04 | 2006-10-18 | 安捷伦科技有限公司 | Method of monitoring progress of a signalling message and network monitoring apparatus |
| CN1845636A (en) * | 2005-04-07 | 2006-10-11 | 华为技术有限公司 | Switching method based on distributed wireless access network |
| WO2009067637A1 (en) * | 2007-11-21 | 2009-05-28 | Nortel Networks Limited | Computing an action time for allocation of resources to a mobile station that is handing over from a source to a target base station |
| CN101217593A (en) * | 2008-01-16 | 2008-07-09 | 中兴通讯股份有限公司 | A performance test device and method of signaling transmission network |
| CN101521920A (en) * | 2008-02-29 | 2009-09-02 | 中兴通讯股份有限公司 | Base station switching method |
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| WO2011150630A1 (en) | 2011-12-08 |
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Application publication date: 20111207 |