CN102064991A - Communication system in asynchronous transfer mode and method for establishing connection in asynchronous transfer mode - Google Patents
Communication system in asynchronous transfer mode and method for establishing connection in asynchronous transfer mode Download PDFInfo
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- CN102064991A CN102064991A CN 200910110180 CN200910110180A CN102064991A CN 102064991 A CN102064991 A CN 102064991A CN 200910110180 CN200910110180 CN 200910110180 CN 200910110180 A CN200910110180 A CN 200910110180A CN 102064991 A CN102064991 A CN 102064991A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/72—Admission control; Resource allocation using reservation actions during connection setup
- H04L47/722—Admission control; Resource allocation using reservation actions during connection setup at the destination endpoint, e.g. reservation of terminal resources or buffer space
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Abstract
The invention relates to a communication system in an asynchronous transfer mode, which comprises a first channel resource module, a first connection module and a first restoration module which are arranged on a local terminal node and a second channel resource module, a second connection module and a second restoration module which are arranged on an opposite terminal node, wherein the first channel resource module is used for occupying channel resources; the first connection module is used for sending an establishment request to the opposite terminal node after the first channel resource module occupies the resources; the second connection module is used for receiving the establishment request sent by the first connection module; the second channel resource module is used for judging whether the corresponding channel resources of the second channel resource module are occupied or not after the second connection module receives the establishing request and occupying the channel resources under the condition that the channel resources are not occupied; the second restoration module is used for issuing restoration when the channel resources are occupied; and the first restoration module is used for restoring the local terminal node when the second restoration module initiates restoration. The invention also provides a method for establishing the connection in the asynchronous transfer mode.
Description
Technical field
The present invention relates to the communications field, in particular to asynchronous transfer mode communication system and set up the method that asynchronous transfer mode connects.
Background technology
(ATM Adapter Layer, AAL) signaling protocol, particularly AAL2 agreement are carrying on the atm virtual circuit passage (ATM VCC) that AAL2 connects AAL, foundation are provided, discharge and keep the function that the point-to-point of AAL2 is connected.The AAL2 signaling protocol also provides the maintenance function relevant with the AAL2 signaling, and the AAL2 that the AAL2 signaling node can be controlled in a plurality of AAL2 passages connects, and is used widely in WCDMA and TD-SCDMA standard.
The process that existing AAL2 signaling protocol connects between two nodes is as follows:
This end node is selected suitable channel resource (CEID) according to the address and the routing iinformation of peer node, such as selector channel (Path) sign and channel logo (CID).This end node is initiated the request of setting up (ERQ) to peer node, comprises the CEID information that this end node distributes in the request.Peer node takies identical channel resource according to the channel resource information in the request of setting up after receiving the foundation request, and confirms (ECF) to this end node transmission foundation.After this end node is received and set up affirmation, connect just and successfully set up, multi-medium datas such as voice just can transmit on passage.
Under the normal condition, channel resource is consistent between two nodes, if promptly this end node channel resource is occupied state, the channel resource of peer node correspondence also is occupied state so.Because communication system occurs sometimes that some are unusual, causes the channel resource seizure condition inconsistent between two nodes that will connect.Such as, unusual back very possible appearance takes place in the bottom signaling, because agreement does not clearly stipulate that for the processing of link down some manufacturer can discharge connection when link down, some manufacturer can not discharge connection.If the node that different vendor equipment is formed docks, after the link down, one end that then may connect has discharged channel resource, and the other end is the busy channel resource still, cause thus two nodes that will connect to channel resource to take situation inconsistent.
Thereby occur when unusual when communication system, if the unappropriated node of channel resource sends the request of foundation, receive the node of the request of foundation because channel resource is occupied, directly return to discharge and confirm to an end that sends the request of foundation, can't set up just connect.
Summary of the invention
The object of the present invention is to provide a kind of asynchronous transfer mode communication system and set up the method that asynchronous transfer mode connects, be used for solving when the asynchronous transfer mode communication system and occur when unusual, if the unappropriated node of channel resource sends the request of foundation, receive the node of the request of foundation because channel resource is occupied, and the problem that can't connect.
A kind of asynchronous transfer mode communication system, comprise this end node and peer node, this end node bag first channel resource module, first link block and first restoration module, peer node comprises second channel resource module, second link block and second restoration module, and wherein: the first channel resource module is used for the busy channel resource; First link block is used for sending the request of foundation to peer node after the first channel resource module takies resource; Second link block is used to receive the foundation request that first link block is sent; The second channel resource module is used for after second link block receives the request of setting up, and judges whether own corresponding channel resource occupied, and under unappropriated situation the busy channel resource; Second restoration module is used for initiating to restore when channel resource is occupied, and first restoration module is used for when second restoration module is initiated to restore this end node being restored.
Preferably, above-mentioned first link block also is used to receive upper-layer user's foundation request.
Preferably, above-mentioned second channel resource module also is used for when channel resource is occupied, sends to discharge to this end node and confirms; The described first channel resource module also is used to discharge the channel resource that this end node takies, and sends the release confirmation to the upper-layer user.
Preferably, above-mentioned second restoration module also is used for sending the request of recovery to this end node, and the channel resource sign is carried in the request of recovery; Above-mentioned first restoration module discharges the channel resource that has taken after also being used to receive the recovery request of second restoration module transmission, sends to discharge to the upper-layer user to confirm, and sends reset confirm to second restoration module;
Preferably, after above-mentioned second restoration module also is used to receive reset confirm, discharge the channel resource that has taken.
A kind of method of setting up the asynchronous transfer mode connection comprises this end node busy channel resource and sends the request of foundation to peer node; Peer node receives the request of foundation and judges whether own corresponding channel resource is occupied, if occupied, then peer node initiates to restore.
Preferably, above-mentioned end node busy channel resource and before peer node sends the request of foundation comprises that also this end node receives upper-layer user's foundation request, and checks the step of the situation that takies of this end node channel resource.
Preferably, the method for setting up the asynchronous transfer mode connection also comprises: if peer node finds that the channel resource of oneself is occupied, then send the release affirmation to this end node; This end node discharges the channel resource that oneself takies after receiving described release affirmation, and sends the release confirmation to the upper-layer user.
Preferably, the step that above-mentioned peer node initiates to restore specifically comprises: peer node sends the request of recovery to this end node, and the channel resource sign is carried in the request of recovery; This end node is received the recovery request that peer node sends, and discharges the channel resource that has taken, and sends to discharge to the upper-layer user to confirm, and sends reset confirm to peer node; After peer node is received reset confirm, discharge the channel resource that has taken.
Preferably, also comprise the step that this end node and peer node connect once more after the step that above-mentioned peer node initiates to restore.
Preferably, the step that above-mentioned end node and peer node connect once more comprises that specifically this end node receives upper-layer user's foundation request once more, checks that the channel resource of oneself is unoccupied, then takies this channel resource, sends the request of foundation to peer node; After peer node is received the request of foundation, check that channel resource is unoccupied, then take this channel resource, and confirm to peer node transmission foundation; After this end node is received and set up affirmation, send foundation to the upper-layer user and confirm that successful connection is set up.
Asynchronous transfer mode communication system in the embodiment of the invention and set up the method that asynchronous transfer mode connects, can solve when the asynchronous transfer mode communication system and occur when unusual, if the unappropriated node of channel resource sends the request of foundation, receive the node of the request of foundation because channel resource is occupied, and the problem that can't connect.
Description of drawings
Figure 1 shows that the structural representation of a kind of asynchronous transfer mode communication system embodiment of the present invention;
Figure 2 shows that a kind of flow chart of setting up the method embodiment of asynchronous transfer mode connection of the present invention;
Figure 3 shows that another kind of the present invention sets up the flow chart of the method embodiment that asynchronous transfer mode connects.
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
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is described in further detail, can be implemented so that those skilled in the art can better understand the present invention also, but illustrated embodiment is not as a limitation of the invention.
Figure 1 shows that the structural representation of a kind of asynchronous transfer mode communication system embodiment of the present invention.
Asynchronous transfer mode (Asynchronous Transfer Mode, ATM) communication system, comprise this end node 10 and peer node 20, this end node 10 comprises the first channel resource module 101, first link block 102 and first restoration module 103, and peer node 20 comprises second channel resource module 201, second link block 202 and second restoration module 203.
The first channel resource module 101 is used for busy channel resource (CEID); First link block 102 is used for sending the request of setting up (ERQ) to peer node 20 after the first channel resource module 101 takies resource; Second link block 202 is used to receive the foundation request that first link block 102 is sent; Second channel resource module 201 is used for after second link block 202 receives the request of setting up, and judges whether own corresponding channel resource occupied, and under unappropriated situation the busy channel resource; Second restoration module 203 is used for initiating to restore when channel resource is occupied, and first restoration module 103 is used for when second restoration module 203 is initiated to restore this end node 10 being restored.
At present embodiment, this end node 10 and peer node 20 are comparatively speaking, and when a certain node sent the foundation request, being about to this node definition was this end node, received the then corresponding peer node that is defined as of node that foundation is asked.This end node 10 and peer node 20 are can be that ATM switch, atm router or other can be used for the network equipment that ATM communicates by letter.Channel resource comprises passage (Path) sign and channel logo (CID).
Preferably, in other embodiments, first link block 102 also is used to receive upper-layer user's foundation request.Second channel resource module 201 also is used for when channel resource is occupied, sends to discharge to this end node 10 and confirms (RLC).The first channel resource module 101 also is used to discharge the channel resource that this end node 10 takies, and sends the release confirmation to the upper-layer user.Second restoration module 203 also is used for sending the request of restoring (RES) to this end node 10, and the channel resource sign is carried in the request of recovery.After second restoration module 203 also is used to receive reset confirm (RSC), discharge the channel resource that has taken.First restoration module 103 discharges the channel resource that has taken after also being used to receive the recovery request of second restoration module, 203 transmissions, sends to discharge to the upper-layer user to confirm, and sends reset confirms to second restoration module 203.
Asynchronous transfer mode communication system in the present embodiment can solve when the asynchronous transfer mode communication system and occur when unusual, if the unappropriated node of channel resource sends the request of foundation, receive the node of the request of foundation because channel resource is occupied, and the problem that can't connect.
Figure 2 shows that a kind of flow chart of setting up the method embodiment of asynchronous transfer mode connection of the present invention.
Step S201, this end node 10 busy channel resources are also sent foundation to peer node 20 and are asked.
Step S202, peer node 20 receive the request of foundation and judge whether own corresponding channel resource is occupied, if occupied, then peer node 20 initiates to restore.
Step S203, this end node 10 is connected once more with peer node 20.
The method of setting up the asynchronous transfer mode connection in the present embodiment, be used for solving when the asynchronous transfer mode communication system and occur when unusual, if the unappropriated node of channel resource sends the request of foundation, receive the node of the request of foundation because channel resource is occupied, and the problem that can't connect.
Figure 3 shows that another kind of the present invention sets up the flow chart of the method embodiment that asynchronous transfer mode connects.
Step S301, this end node 10 receives upper-layer user's foundation request, and checks the situation that takies of this end node 10 channel resources.
Step S302 if peer node 20 finds that the channel resource of oneself is occupied, then sends to discharge to this end node 10 and confirms.
Step S303, this end node 10 discharge the channel resource that oneself takies after receiving described release affirmation, and send the release confirmation to the upper-layer user.
Step S304, peer node 20 sends the request of recovery to this end node 10, and the channel resource sign is carried in the request of recovery.
Step S305, this end node 10 receive the recovery request that peer node 20 is sent, and discharge the channel resource that has taken, and send to discharge to the upper-layer user to confirm, and send reset confirm to peer node 20.
Step S306 after peer node 20 is received reset confirm, discharges the channel resource that has taken.
Step S307, this end node 10 receive upper-layer user's foundation request once more, check that the channel resource of oneself is unoccupied, then take this channel resource, send the request of foundation to peer node 20.
After step S308, peer node 20 receive the request of foundation, check that channel resource is unoccupied, then take this channel resource, and confirm to the 10 transmission foundation of this end node.
After step S309, this end node 10 receive and set up affirmation, send foundation to the upper-layer user and confirm that successful connection is set up.
The method of setting up the asynchronous transfer mode connection in the present embodiment, be used for solving when the asynchronous transfer mode communication system and occur when unusual, if the unappropriated node of channel resource sends the request of foundation, receive the node of the request of foundation because channel resource is occupied, and the problem that can't connect.
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. asynchronous transfer mode communication system, comprise this end node and peer node, it is characterized in that, described end node comprises the first channel resource module, first link block and first restoration module, described peer node comprises second channel resource module, second link block and second restoration module, wherein:
The described first channel resource module is used for the busy channel resource;
Described first link block is used for sending the request of foundation to peer node after the first channel resource module takies resource;
Described second link block is used to receive the foundation request that described first link block is sent;
Described second channel resource module is used for judging whether own corresponding channel resource is occupied after described second link block receives described foundation request;
Described second restoration module is used for initiating to restore when channel resource is occupied, and described first restoration module is used for when second restoration module is initiated to restore this end node being restored.
2. the device of setting up the asynchronous transfer mode connection as claimed in claim 1 is characterized in that described first link block also is used to receive upper-layer user's foundation request.
3. the device of setting up the asynchronous transfer mode connection as claimed in claim 2 is characterized in that described second channel resource module also is used for when channel resource is occupied, sends to discharge to this end node and confirms; The described first channel resource module also is used to discharge the channel resource that this end node takies, and sends the release confirmation to the upper-layer user.
4. as claim 2 or the 3 described devices of setting up the asynchronous transfer mode connection, it is characterized in that:
Described second restoration module also is used for sending the request of recovery to this end node, and the channel resource sign is carried in the request of recovery;
Described first restoration module discharges the channel resource that has taken after also being used to receive the recovery request of second restoration module transmission, sends to discharge to the upper-layer user to confirm, and sends reset confirm to second restoration module;
After described second restoration module also is used to receive reset confirm, discharge the channel resource that has taken.
5. set up the method that asynchronous transfer mode connects for one kind, it is characterized in that, comprising:
This end node busy channel resource is also sent foundation to peer node and is asked;
Peer node receives the request of foundation and judges whether own corresponding channel resource is occupied, if occupied, then peer node initiates to restore.
6. the method for setting up the asynchronous transfer mode connection as claimed in claim 5, it is characterized in that, this end node busy channel resource and before peer node sends the request of setting up, comprise that also this end node receives upper-layer user's foundation request, and check the step of the situation that takies of this end node channel resource.
7. the method for setting up the asynchronous transfer mode connection as claimed in claim 6 is characterized in that, also comprises:
If peer node finds that the channel resource of oneself is occupied, then send to discharge and confirm to this end node;
This end node discharges the channel resource that oneself takies after receiving described release affirmation, and sends the release confirmation to the upper-layer user.
8. the method for setting up the asynchronous transfer mode connection as claimed in claim 7 is characterized in that, the step that described peer node initiates to restore specifically comprises:
Peer node sends the request of recovery to this end node, and the channel resource sign is carried in the request of recovery;
This end node is received the recovery request that peer node sends, and discharges the channel resource that has taken, and sends to discharge to the upper-layer user to confirm, and sends reset confirm to peer node;
After peer node is received reset confirm, discharge the channel resource that has taken.
9. as each described method of setting up the asynchronous transfer mode connection of claim 5 to 8, it is characterized in that described peer node also comprises the step that this end node and peer node connect once more after initiating to restore.
10. as claimed in claim 9ly set up the method that asynchronous transfer mode connects, it is characterized in that, the step that described end node and peer node connect once more specifically comprises:
This end node receives upper-layer user's foundation request once more, checks that the channel resource of oneself is unoccupied, then takies this channel resource, sends the request of foundation to peer node;
After peer node is received the request of foundation, check that channel resource is unoccupied, then take this channel resource, and confirm to peer node transmission foundation;
After this end node is received and set up affirmation, send foundation to the upper-layer user and confirm that successful connection is set up.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910110180 CN102064991A (en) | 2009-11-12 | 2009-11-12 | Communication system in asynchronous transfer mode and method for establishing connection in asynchronous transfer mode |
| PCT/CN2010/078386 WO2011057539A1 (en) | 2009-11-12 | 2010-11-03 | Asynchronous transfer mode communication system and method for establishing asynchronous transfer mode connections |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910110180 CN102064991A (en) | 2009-11-12 | 2009-11-12 | Communication system in asynchronous transfer mode and method for establishing connection in asynchronous transfer mode |
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| CN102064991A true CN102064991A (en) | 2011-05-18 |
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| CN 200910110180 Pending CN102064991A (en) | 2009-11-12 | 2009-11-12 | Communication system in asynchronous transfer mode and method for establishing connection in asynchronous transfer mode |
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| ATE350843T1 (en) * | 2004-03-12 | 2007-01-15 | Siemens Spa Italiana | METHOD FOR ESTABLISHING A CONNECTION BETWEEN TWO ALL2 ENDPOINTS IN A COMMUNICATIONS NETWORK |
| CN101217552A (en) * | 2008-01-15 | 2008-07-09 | 中兴通讯股份有限公司 | A method and system established with the support of AAL2 |
| CN101257438B (en) * | 2008-01-22 | 2010-07-14 | 中兴通讯股份有限公司 | Method for keeping consistence of channel occlusion state among nodes |
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Application publication date: 20110518 |