CN101257438B - Method for keeping consistence of channel occlusion state among nodes - Google Patents
Method for keeping consistence of channel occlusion state among nodes Download PDFInfo
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- CN101257438B CN101257438B CN2008100008309A CN200810000830A CN101257438B CN 101257438 B CN101257438 B CN 101257438B CN 2008100008309 A CN2008100008309 A CN 2008100008309A CN 200810000830 A CN200810000830 A CN 200810000830A CN 101257438 B CN101257438 B CN 101257438B
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Abstract
Disclosed is a method for ensuring the channel blocked states among nodes to be consistent, including the steps that: a channel is in a local blocked state in the local node of the channel and in remote blocked state in the remote node of the channel; the local node of the channel sends block cleared information and block information subsequently to the remote node of the channel; the remote node of the channel firstly answers the block cleared information and sends the block cleared confirmation information to the local node of the channel, and then answers the block information and sends the block confirmation information to the local node of the channel, at this point, the channel is in remote blocked state in the remote node of the channel; after the local node of the channel receives the block cleared confirmation information from the remote node of the channel, the channel is set in the local blocked state. According to the invention, the inconsistent situation of the blocked states on two sides of an AAL2 channel is effectively avoided while in the AAL2 channel block operation and block cleared operation, so as to increase the service quality of the AAL2 node device.
Description
Technical field
The present invention relates to communication technical field, more specifically, relate to the method that is used to keep channel occlusion state consistent among nodes.
Background technology
AAL2 (ATM Adaptation Layer type 2) is a kind of media channel that can voice-bearer, AAL2 signaling protocol (hereinafter to be referred as agreement) is mainly used between the ATM switch of broadband communication network, between the mobile switch in the 3G (Third Generation) Moblie net, the control of the AAL2 carrying between the same RNC of mobile switch (radio network controller) and the Node B (base transceiver station), specifically comprises foundation, modification and the release of control AAL2 carrying.
Agreement is finished aforementioned controlled function by mutual signaling message between AAL2 business end or AAL2 switch (following general designation AAL2 node).When needs are set up an AAL2 carrying, the drive end that carrying is set up is selected an available AAL2 passage according to the state of each AAL2 passage of local terminal earlier, AAL2 channel recognition symbol is used for discerning uniquely the AAL2 passage between the adjacent a pair of AAL2 node, drive end is placed on the channel recognition symbol of the AAL2 that local terminal is selected in ERQ (the setting up request) message, the Partner of setting up to carrying sends, after Partner is received ERQ message, must take identical AAL2 passage at local terminal according to AAL2 channel recognition symbol wherein.
After carrying was set up and finished, media datas such as voice just transmitted on this AAL2 passage.Opening in the maintenance of node device, we can set up many AAL2 passages usually between two AAL2 nodes, if find the user on certain bar AAL2 passage abnormal conditions such as packet loss are arranged, when being unsuitable for again the admission service data, the block service that we will utilize agreement to provide falls this AAL2 passage obturation, continues to admit new business datum to stop it; Also having a kind of situation is that we find that calling rate is low; such as making a call ten; have five not connect, the scene has many AAL2 passages to be in service state again, so we can to utilize the method for inaccessible AAL2 passage to investigate usually be that fault has appearred in which bar passage on earth.The agreement regulation, obturation can be started by any AAL2 end node of control AAL2 passage, and after the startup obturation, AAL2 passage two ends all enter blocked state.Any AAL2 node can not select inaccessible AAL2 passage to be used for new business.Corresponding with obturation is unblocking, and unblocking can only be started by the AAL2 node that starts inaccessible program, finishes unblocking by sending the unblocking request.After inaccessible the releasing, all remove blocked state, and this AAL2 passage can be reused for and sets up new AAL2 carrying and admission service data at any end of AAL2 passage.This is inaccessible and unblocking operation function and effect in actual use.
Any AAL2 passage all has two blocked states: local inaccessible and far-end obturation.As long as the AAL2 passage is in any state in these two states, just think that this passage is in blocked state.Corresponding therewith, have only when the AAL2 passage is in " local unblocking " simultaneously with " far-end unblocking ", think that just this passage is in the unblocking state.
The obturation of agreement regulation and the detailed process of unblocking are described below, and the problem that will cause thus.Illustrate that for convenience in the accompanying drawing, " local obturation=1 " expression passage is in local blocked state, " local obturation=0 " expression passage is in local unblocking state; " far-end obturation=1 " expression passage is in the far-end blocked state, and " far-end obturation=0 " expression passage is in far-end unblocking state.
Inaccessible flow process is as shown in Figure 1:
S102, after AAL2 node x started inaccessible passage i, node x side i was set to local blocked state, and x sends BLO (obturation) message to the other end AAL2 of i node y then.
S104, the initial condition of y wing passage i is the unblocking state.After y receives BLO message, i is changed to the far-end blocked state, and responds BLC (blocking acknowledgement) message to x in the y side.
S106, x receive the BLC message from y, no longer the state of passage i are operated.
The unblocking flow process is as shown in Figure 2:
S202, AAL2 node x is to after being in local inaccessible passage j startup unblocking, and the state of inoperation local terminal j, but sends UBL (unblocking) message to the other end AAL2 of j node y earlier.
S204, y are before the UBL message of receiving from x, and y wing passage j state at this moment is the far-end blocked state.After y receives UBL message, in the y side far-end blocked state of j is removed, and responded UBC (unblocking affirmation) message to x.
S206, x just remove the local blocked state of local terminal passage j after receiving UBC.
According to above-mentioned flow process, Fig. 3 shows a kind of inconsistent application scenarios of blocked state that will cause AAL2 passage between adjacent AAL2 node, wherein:
S302, an AAL2 passage k between adjacent AAL2 node x and the y before started inaccessible by x and were in blocked state, saw in the x side, for local inaccessible, saw in the y side, were the far-end obturation.X starts the unblocking operation to it now, then sends UBL message by x to y, and x wing passage k keeps local blocked state.
After S304, y receive UBL message, remove the far-end blocked state of passage k, and respond UBC message to x.
S306, x are before receiving the UBC message that y sends, and again owing to reasons such as manual operation have started block service to passage k, this moment, passage k also was in local blocked state, and therefore according to the agreement regulation, x does not do any operation to k, only sends BLO message to y.
S308, this moment, x received the UBC message that y sends, so dispose the local blocked state of passage k.
S310, y wing passage k is in the unblocking state at this moment, receive BLO message from x after, it is the far-end blocked state that y puts k, and responds BLC message to x.
S312, x receive the BLC message that y sends, and the state of passage k are not done any operation, so the state of k still remains the unblocking state.
After said process finishes, x wing passage k is the unblocking state, y wing passage k is the far-end blocked state, the state of two wing passage k is inconsistent, the operation S306 of the inaccessible passage k of x side does not have onset, if k is an out of order AAL2 passage, the business datum that it still might be taken in the fresh in follow-up calling relaying continued access in the x side causes adverse consequences so.
Summary of the invention
Consider the problems referred to above and make the present invention that for this reason, main purpose of the present invention is, a kind of method that is used to keep channel occlusion state consistent among nodes is provided.
According to the method that is used to keep channel occlusion state consistent among nodes of the present invention, may further comprise the steps: step S402, the AAL2 passage is in local blocked state at the local AAL2 node of AAL2 passage, be in the far-end blocked state at the far-end AAL2 of AAL2 passage node, the local AAL2 node of AAL2 passage successively sends unblocking message and block message to the far-end AAL2 of AAL2 passage node, the far-end AAL2 node of AAL2 passage at first responds unblocking message, local AAL2 node to the AAL2 passage sends the unblocking acknowledge message, the block message of the far-end AAL2 node of AAL2 passage response afterwards, local AAL2 node to the AAL2 passage sends blocking acknowledgement message, at this moment, the AAL2 passage is in the far-end blocked state at the far-end AAL2 of AAL2 passage node; And step S404, the local AAL2 node of AAL2 passage is provided with the AAL2 passage after the blocking acknowledgement message of reception from the far-end AAL2 node of AAL2 passage be local blocked state.
In addition, in the step S402 of this method, the local AAL2 node of AAL2 passage starts the unblocking operation of AAL2 passage.
In addition, in the step S402 of this method, the far-end AAL2 node of AAL2 passage is after the local AAL2 node of AAL2 passage sends blocking acknowledgement message, and the AAL2 passage is in local unblocking state at the local AAL2 node of AAL2 passage.
In addition, after the step S404 of this method, the AAL2 passage is in local blocked state at the local AAL2 node of AAL2 passage, is in the far-end blocked state at the far-end AAL2 of AAL2 passage node, the blocked state unanimity of both sides AAL2 passage.
In addition, in the method, blocked state is local blocked state and/or far-end blocked state.
By above-mentioned aspect of the present invention, can avoid effectively that blocked state inconsistent situation in AAL2 passage both sides takes place in to the obturation of AAL2 passage and unblocking operation, guarantee the accuracy of AAL2 node device when operation, and then promote the service quality of AAL2 node device.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 shows the schematic flow sheet of the inaccessible AAL2 passage of prior art;
Fig. 2 shows the schematic flow sheet of the releasing AAL2 passage obturation of prior art;
Fig. 3 shows a kind of inconsistent application scenarios of blocked state that will cause AAL2 passage between adjacent AAL2 node;
Fig. 4 shows the flow chart of method that is used to keep channel occlusion state consistent among nodes according to the embodiment of the invention; And
Fig. 5 shows the flow chart of method that is used to keep channel occlusion state consistent among nodes according to another embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Fig. 4 shows the flow chart of method that is used to keep channel occlusion state consistent among nodes according to the embodiment of the invention.
As shown in Figure 4, comprise: step S402, passage is in local blocked state at the local node of passage, distant-end node at passage is in the far-end blocked state, the local node of passage successively sends unblocking message and block message to the distant-end node of passage, the distant-end node of passage at first responds unblocking message, local node to passage sends the unblocking acknowledge message, the block message of the distant-end node of passage response afterwards, local node to passage sends blocking acknowledgement message, at this moment, passage is in the far-end blocked state at the distant-end node of passage; And step S404, the local node of passage is provided with passage after the blocking acknowledgement message of reception from the distant-end node of passage be local blocked state.
In addition, in the step S402 of this method, the local node of passage starts the unblocking operation of passage.
In addition, in the step S402 of this method, the distant-end node of passage is after the local node of passage sends blocking acknowledgement message, and passage is in local unblocking state at the local node of passage.
In addition, after the step S404 of this method, passage is in local blocked state at the local node of passage, is in the far-end blocked state, the blocked state unanimity of two wing passages at the distant-end node of passage.
In addition, in the method, blocked state comprises local blocked state and/or far-end blocked state.
The specific embodiment of the present invention is: start inaccessible node after receiving the BLC that the opposite end is returned (blocking acknowledgement) message, the local blocked state of this passage of local terminal is set once more, to keep the blocked state unanimity of passage between adjacent AAL2 node.
Be connected to example with a RNC (radio network controller) in the 3G (Third Generation) Moblie net and a Node B (base transceiver station) by AAL2, Fig. 5 shows the flow chart of method that is used to keep channel occlusion state consistent among nodes according to another embodiment of the present invention.
As shown in Figure 5, may further comprise the steps:
Step S502, an AAL2 passage k between adjacent RNC and the Node B before started inaccessible by RNC and were in blocked state, and therefore in the RNC side, k is local blocked state, and in Node B side, k is the far-end blocked state.Both sides blocked state unanimity.RNC starts the unblocking operation to k now, and then RNC sends UBL message to Node B, and RNC wing passage k keeps local blocked state at this moment.
Step S504 after Node B receives UBL message, removes the far-end blocked state of passage k, and responds UBC message to RNC.
Step S506, RNC are before receiving the UBC message that Node B sends, again owing to reasons such as manual operation have started block service to passage k, this moment, passage k also was in local blocked state, therefore according to the agreement regulation, RNC does not do any operation to k, only sends BLO message to Node B.
Step S508, this moment, RNC received the UBC message that Node B sends, so dispose the local blocked state of local terminal passage k.
Step S510, Node B wing passage k is in the unblocking state at this moment, receive BLO message from RNC after, it is the far-end blocked state that Node B is provided with k, and responds BLC message to RNC.
After step S512, RNC received BLC message from Node B, it was local blocked state that local terminal passage k is set.
After said process finished, RNC wing passage k was local blocked state, and Node B wing passage k is the far-end blocked state, and the blocked state of two wing passage k is consistent.
In sum, by the present invention, can avoid effectively that blocked state inconsistent situation in AAL2 passage both sides takes place in to the obturation of AAL2 passage and unblocking operation, guarantee the accuracy of AAL2 node device when operation, and then promote the service quality of AAL2 node device.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a method that is used to keep channel occlusion state consistent among nodes is characterized in that, may further comprise the steps:
Step S402, the AAL2 passage is in local blocked state at the local AAL2 node of described AAL2 passage, be in the far-end blocked state at the far-end AAL2 of described AAL2 passage node, the local AAL2 node of described AAL2 passage successively sends unblocking message and block message to the far-end AAL2 of described AAL2 passage node, the far-end AAL2 node of described AAL2 passage at first responds unblocking message, local AAL2 node to described AAL2 passage sends the unblocking acknowledge message, the far-end AAL2 node response block message of described afterwards AAL2 passage, local AAL2 node to described AAL2 passage sends blocking acknowledgement message, at this moment, described AAL2 passage is in the far-end blocked state at the far-end AAL2 of described AAL2 passage node; And
Step S404, the local AAL2 node of described AAL2 passage is provided with described AAL2 passage after the described blocking acknowledgement message of reception from the far-end AAL2 node of described AAL2 passage be local blocked state.
2. method according to claim 1 is characterized in that, in described step S402, the local AAL2 node of described AAL2 passage starts the unblocking operation of described AAL2 passage.
3. method according to claim 2, it is characterized in that, in described step S402, the far-end AAL2 node of described AAL2 passage is after the local AAL2 node of described AAL2 passage sends described blocking acknowledgement message, and described AAL2 passage is in local unblocking state at the local AAL2 node of described AAL2 passage.
4. method according to claim 1, it is characterized in that, after described step S404, described AAL2 passage is in local blocked state at the local AAL2 node of described AAL2 passage, be in the far-end blocked state at the far-end AAL2 of described AAL2 passage node, the blocked state unanimity of the described AAL2 passage in both sides.
5. method according to claim 4 is characterized in that, described blocked state is described local blocked state and/or described far-end blocked state.
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| CN101938753A (en) * | 2009-06-30 | 2011-01-05 | 上海贝尔股份有限公司 | Synchronization method for states of AAL2 paths and device thereof |
| CN102064991A (en) * | 2009-11-12 | 2011-05-18 | 中兴通讯股份有限公司 | Communication system in asynchronous transfer mode and method for establishing connection in asynchronous transfer mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1531251A (en) * | 2003-03-10 | 2004-09-22 | 华为技术有限公司 | Method for maintaining origination outgoing circuit of switch |
| CN1848755A (en) * | 2005-04-15 | 2006-10-18 | 中兴通讯股份有限公司 | Available management method for asynchronous transmission mode adaptive layer 2 business channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1531251A (en) * | 2003-03-10 | 2004-09-22 | 华为技术有限公司 | Method for maintaining origination outgoing circuit of switch |
| CN1848755A (en) * | 2005-04-15 | 2006-10-18 | 中兴通讯股份有限公司 | Available management method for asynchronous transmission mode adaptive layer 2 business channel |
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