CN102420753B - Automatic protection switching (APS) protocol state transition method and device - Google Patents
Automatic protection switching (APS) protocol state transition method and device Download PDFInfo
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- CN102420753B CN102420753B CN201110384186.1A CN201110384186A CN102420753B CN 102420753 B CN102420753 B CN 102420753B CN 201110384186 A CN201110384186 A CN 201110384186A CN 102420753 B CN102420753 B CN 102420753B
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Abstract
The invention discloses an automatic protection switching (APS) protocol state transition method and device. The method comprises the steps of: receiving an APS message of an opposite end device in an APS protocol; obtaining an APS state of the opposite end device from information carried in the APS message; obtaining the APS state of a local device; and when the APS state of the local device is a no request (NR) state and a requested signal of the NR state is an invalid signal, transiting the APS state of the local device from the NR state to the DNR (No Not Revert) state. The invention can be used for perfecting and implementing the transition condition of the NR state in the APS protocol and transiting the NR state into the DNR state aiming at the special condition that an NR state device receives the APS message of a DNR state device so that two end devices have consistent states, ensures data streams of the two end devices of the APS protocol are not interrupted, and ensures normal communication.
Description
Technical field
The present invention relates to communication technical field, specially refer to APS APS transferring protocol state method and device thereof.
Background technology
APS (Automatic Protection Switching, APS) agreement is a kind of agreement that realizes APS.The implementation method of APS protocol is simple; switch fast; his general principle is: when point-to-point or point-to-multipoint between while there is mulitpath; between mulitpath, can form backup; be operating path by the path definition using; other backup paths are defined as to Protection path, after the operating path of initial choice for use lost efficacy, are switched to fast on other Protection paths.
APS agreement terminal device can send APS protocol massages mutually, the APS state of opposite equip. can be communicated to local device by protocol massages, local device can consult to determine self state according to the APS state in APS message, is decided and is selected which paths by self APS state.The APS state that APS agreement specifies at present has 11 kinds, and has specified the height of priority and the rule of state transition.In APS agreement, specify, when the priority of status of local device is during lower than the priority of status of APS agreement opposite equip., oneself state is moved to high priority state by local device, is consistent with the state of opposite equip..
But, under non-reversing mode (Non-revertive mode), include DNR (Do Not Revert, irrevocable) and NR (No Request, unsolicited) two states, and request signal (Requested signal) under NR state is divided into two kinds of invalid signals (null signal) and standard signals (normal signal).In the time that the local device of DNR state receives that opposite equip. state is the APS message of NR state, because the priority of DNR state is higher, therefore the state of local device remains unchanged; And under normal circumstances, the local device of NR-null signal state is the APS message that can not receive DNR state, therefore regulation not in the APS agreement.But, in actual applications, the local device that may occur NR-null signal state is received the situation of the APS message that the opposite equip. of DNR state sends, and now owing to not specifying in APS agreement, therefore can not process the state of local device, NR state can remain unchanged, cause the APS state of APS agreement terminal device inconsistent, and then the path that causes APS agreement terminal device to be selected is also inconsistent, the data flow between terminal device will be interrupted, and cannot carry out proper communication.
Summary of the invention
Main purpose of the present invention is for providing a kind of APS APS transferring protocol state method and device thereof that NR state can be switched to DNR state, guarantee proper communication.
The present invention proposes a kind of APS APS transferring protocol state method, comprises step:
Receive the APS message of opposite equip. in APS APS agreement;
The information of carrying from described APS message, obtain the APS state of opposite equip.;
Obtain the APS state of local device;
The APS state of the opposite equip. carrying when described APS message is irrevocable DNR state, and the APS state of described local device is unsolicited NR state, and when the request signal of this NR state is invalid signals, be DNR state by the APS state of described local device by NR state transition.
Preferably, the APS state of the described opposite equip. carrying when described APS message is irrevocable DNR state, and the APS state of described local device is unsolicited NR state, and when the request signal of this NR state is invalid signals, be that DNR state specifically comprises by the APS state of described local device by NR state transition:
Whether the APS state that judges described opposite equip. is DNR state;
In the time that the APS of described opposite equip. state is DNR state, the priority of the APS state of more described opposite equip. and local device.
Preferably, the APS state of the described opposite equip. carrying when described APS message is irrevocable DNR state, and the APS state of described local device is unsolicited NR state, and when the request signal of this NR state is invalid signals, be that DNR state also specifically comprises by the APS state of described local device by NR state transition:
When the priority of the APS of described opposite equip. state is during higher than the priority of the APS state of local device, judge whether the APS state of described local device is NR state;
In the time that the APS of described local device state is NR state, judge whether the request signal of this NR state is invalid signals;
In the time that the request signal of described NR state is invalid signals, be DNR state by the APS state of described local device by NR state transition.
Preferably, in described reception APS APS agreement, after the APS message of opposite equip., also comprise:
Whether the APS message that judges described opposite equip. is legal, if illegal, abandons described APS message.
Preferably, described is that DNR state also comprises afterwards by the APS state of described local device by NR state transition:
The operating path of described local device is switched to Protection path.
The present invention also proposes a kind of APS APS transferring protocol state device, comprising:
Message receiver module, for receiving the APS message of APS APS agreement opposite equip.;
State acquisition module, obtains the APS state of opposite equip. for the information of carrying from described APS message; Obtain the APS state of local device;
State transition module, the APS state that is used for the opposite equip. carrying when described APS message is irrevocable DNR state, and when the APS state of described local device is unsolicited NR state, and when the request signal of this NR state is invalid signals, be DNR state by the APS state of described local device by NR state transition.
Preferably, described state transition module specifically for:
Whether the APS state that judges described opposite equip. is DNR state;
In the time that the APS of described opposite equip. state is DNR state, the priority of the APS state of more described opposite equip. and local device.
Preferably, described state transition module also specifically for:
When the priority of the APS of described opposite equip. state is during higher than the priority of the APS state of local device, judge whether the APS state of described local device is NR state;
In the time that the APS of described local device state is NR state, judge whether the request signal of this NR state is invalid signals;
In the time that the request signal of described NR state is invalid signals, be DNR state by the APS state of described local device by NR state transition.
Preferably, described message receiver module also for:
Whether the APS message that judges described opposite equip. is legal, if illegal, abandons described APS message.
Preferably, described APS APS transferring protocol state device also comprises:
Path switching module, for being switched to Protection path by the operating path of described local device.
The present invention improves and supplements the migration situation of NR state in APS agreement, receive these special circumstances of APS message of DNR status devices for NR status devices, be DNR state by NR state transition, make terminal device state consistency, ensured that APS agreement terminal device data flow do not interrupt, the communication of guaranteeing is normal.
Brief description of the drawings
Fig. 1 is the flow chart of APS APS transferring protocol state method in one embodiment of the invention;
Fig. 2 is the flow chart of state transition step in the transferring protocol state of APS APS shown in Fig. 1 method;
Fig. 3 is the flow chart of APS APS transferring protocol state method in another embodiment of the present invention, and the method embodiment comprises message validity determining step;
Fig. 4 is the flow chart of APS APS transferring protocol state method in another embodiment of the present invention, and the method embodiment comprises path switching step;
Fig. 5 is the structural representation of APS APS transferring protocol state device in one embodiment of the invention;
Fig. 6 is the structural representation of APS APS transferring protocol state device in another embodiment of the present invention, and this embodiment comprises path switching module.
Realization, functional characteristics and the advantage of the object of the invention, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, Fig. 1 is the flow chart of APS APS transferring protocol state method in one embodiment of the invention, and the APS APS transferring protocol state method that the embodiment of the present invention is mentioned comprises:
Step S10, the APS message of opposite equip. in reception APS APS agreement;
In the present embodiment; in APS APS agreement, terminal device sends APS message to opposite equip. respectively; the present embodiment is only taking one end wherein as example; by APS protocol massages, the APS state advertisement of opposite equip. is arrived to local device, local device can consult to determine according to the APS state of the opposite equip. in APS message the state of self.
Step S20, obtains the APS state of opposite equip. the information of carrying from APS message;
In the present embodiment, in the APS protocol massages that opposite equip. sends to local device, carry the APS state information of opposite equip., by APS protocol massages, the APS state advertisement of opposite equip. is arrived to local device, local device can consult to determine according to the APS state of the opposite equip. in APS message the state of self.
Step S30, obtains the APS state of local device;
Step S40, the APS state of the opposite equip. carrying when APS message is irrevocable DNR state, and the APS state of local device is unsolicited NR state, and the request signal of this NR state is while being invalid signals, is DNR state by the APS state of local device by NR state transition.
The present embodiment is that the migration situation of NR state in APS agreement is improved and supplemented, receive these special circumstances of APS message of DNR status devices for NR status devices, therefore need to judge whether the opposite equip. of transmission APS message is DNR state, also need to judge whether the local device of reception DNR state message is NR status devices, and the request signal of NR state is invalid signals simultaneously.Because DNR priority of status is higher than NR priority of status, therefore keep the DNR state of high priority one end equipment constant, be only DNR state by the NR state transition of low priority one end equipment, make terminal device state consistency, ensured that APS agreement terminal device data flow do not interrupt, the communication of guaranteeing is normal.
As shown in Figure 2, Fig. 2 is the flow chart of state transition step in the transferring protocol state of APS APS shown in Fig. 1 method.Step S40 specifically comprises:
Step S41, judges whether the APS state of opposite equip. is DNR state;
Step S42, in the time that the APS of opposite equip. state is DNR state, the relatively priority of the APS state of opposite equip. and local device.
The present embodiment receives these special circumstances of APS message of DNR status devices especially for NR status devices, therefore, while needing the APS state of opposite equip. to be DNR state, just carry out subsequent operation, other states no longer carry out subsequent operation, directly jump out flow process, can save the judgement time, improve treatment effeciency.If the APS state of opposite equip. is not DNR state, terminal device will be processed according to the regulation of APS agreement.If the APS state of opposite equip. is DNR state, the present embodiment is also according to the priority of the each state specifying in APS agreement, and the priority of the APS state to terminal device is differentiated.
Step S43, when the priority of the APS of opposite equip. state is during higher than the priority of the APS state of local device, judges whether the APS state of local device is NR state;
Step S44, in the time that the APS of local device state is NR state, judges whether the request signal of this NR state is invalid signals;
The present embodiment receives after the APS message of DNR status devices for NR status devices especially, NR state is to these special circumstances of DNR state transition, therefore, while needing the APS state of local device to be NR state, just carry out subsequent operation, other states no longer carry out subsequent operation, directly jump out flow process, can save the judgement time, improve treatment effeciency.If the APS state of local device is not NR state, terminal device will be processed according to the regulation of APS agreement.
Step S45, in the time that the request signal of NR state is invalid signals, is DNR state by the APS state of local device by NR state transition.
The equipment that the present embodiment is only invalid signals for NR state and request signal receives after the APS message of DNR status devices, NR state is to these special circumstances of DNR state transition, in the time that the request signal of the NR of local device state is invalid signals null signal, just carry out subsequent operation, if when the request signal of NR state is standard signal normal signal, directly jump out flow process, terminal device is by constant the regulation hold mode according to APS agreement.
As shown in Figure 3, Fig. 3 is the flow chart of APS APS transferring protocol state method in another embodiment of the present invention, and the method embodiment comprises message validity determining step.After step S10, also comprise:
Step S11, judges that whether the APS message of opposite equip. is legal, if illegal, abandons APS message.
In the present embodiment, some APS message also carries other information, and such as device id, network connectivty etc., because the present embodiment is only for carrying APS agreement opposite equip. state, to be judged to be illegal packet for the APS message that does not carry opposite equip. state information, should abandon.In addition; some time, due to Network Abnormal or other reasons, causing the APS message receiving not is the message that APS agreement opposite equip. corresponding to local device sends; now can recognize this message by device id information in APS message illegal, need abandon.The present embodiment, by the judgement of APS message validity, can avoid processing a large amount of junk information, effectively improves treatment effeciency.
As shown in Figure 4, Fig. 4 is the flow chart of APS APS transferring protocol state method in another embodiment of the present invention, and the method embodiment comprises path switching step.After step S30, also comprise:
Step S40, is switched to Protection path by the operating path of local device.
After the present embodiment is DNR state by the APS state of local device by NR state transition; local device by select path switching to Protection path; the path that now local device and opposite equip. are selected is Protection path; terminal device data flow keeps clear and does not interrupt, and can carry out follow-up proper communication.Meanwhile, the APS state of local device and the APS state of opposite equip. are consistent, and are DNR state, and according to APS agreement regulation, the state of terminal device can not move again, will remain on DNR state, has ensured lasting proper communication.
As shown in Figure 5, Fig. 5 is the structural representation of APS APS transferring protocol state device in one embodiment of the invention, and the APS APS transferring protocol state device that the embodiment of the present invention is mentioned comprises:
Message receiver module 10, for receiving the APS message of APS APS agreement opposite equip.;
State acquisition module 20, obtains the APS state of opposite equip. for the information of carrying from APS message; Obtain the APS state of local device;
State transition module 30, the APS state that is used for the opposite equip. carrying when APS message is irrevocable DNR state, and when the APS state of local device is unsolicited NR state, and when the request signal of this NR state is invalid signals, be DNR state by the APS state of local device by NR state transition.
In the present embodiment, in APS APS agreement, terminal device sends APS message to opposite equip. respectively, receives APS message by terminal device message receiver module 10 separately.The present embodiment is only taking one end wherein as example, message receiver module 10 receives the APS message that opposite equip. sends, in APS message, carry the APS state information of opposite equip., from APS protocol massages, obtain the APS state of opposite equip. by state acquisition module 20, state acquisition module 20 is also obtained the APS state of local device simultaneously, and local device can consult to determine according to the APS state of the opposite equip. in APS message the state of self.Because the present embodiment is that the migration situation of NR state in APS agreement is improved and supplemented, receive these special circumstances of APS message of DNR status devices for NR status devices, therefore need to judge by state acquisition module 20 whether the opposite equip. of transmission APS message is DNR state, state acquisition module 20 also needs to judge whether the local device of reception DNR state message is NR status devices simultaneously, and the request signal of NR state is invalid signals.Because DNR priority of status is higher than NR priority of status, therefore keep the DNR state of high priority one end equipment constant, state transition module 30 by low priority one end equipment is DNR state by the NR state transition of equipment of itself, make terminal device state consistency, ensured that APS agreement terminal device data flow do not interrupt, the communication of guaranteeing is normal.
In the embodiment of the present invention, state transition module 30 specifically for:
Whether the APS state that judges opposite equip. is DNR state;
In the time that the APS of opposite equip. state is DNR state, the relatively priority of the APS state of opposite equip. and local device.
The present embodiment receives these special circumstances of APS message of DNR status devices especially for NR status devices, therefore, while needing the APS state of opposite equip. to be DNR state, state acquisition module 20 is just carried out the compare operation of succeeding state priority, the priority of status of local device and opposite equip. is compared, priority of status for opposite equip. just carries out the follow-up local device state of operation that obtains higher than local device, the priority that for the APS state of opposite equip. is the APS state of other states or opposite equip. is no longer carried out subsequent operation lower than local device, can save the judgement time, improve treatment effeciency.If the APS state of opposite equip. is not DNR state, terminal device will be processed according to the regulation of APS agreement.If the APS state of opposite equip. is DNR state, state transition module 30 is also according to the priority of the each state specifying in APS agreement, and the priority of the APS state to terminal device is differentiated.
In the embodiment of the present invention, state transition module 30 also specifically for:
When the priority of the APS of opposite equip. state is during higher than the priority of the APS state of local device, judge whether the APS state of local device is NR state;
In the time that the APS of local device state is NR state, judge whether the request signal of this NR state is invalid signals;
In the time that the request signal of NR state is invalid signals, be DNR state by the APS state of local device by NR state transition.
The equipment that the present embodiment is only invalid signals for NR state and request signal receives after the APS message of DNR status devices, NR state is to these special circumstances of DNR state transition, therefore, the APS state that first state transition module 30 need judge local device is during as NR state, just carry out subsequent request signal decision operation, in the time that the request signal of the NR of local device state is invalid signals null signal, just carry out succeeding state migration operation, if when the APS state of local device is not standard signal normal signal for the request signal of NR state or NR state, no longer carry out subsequent operation, directly jump out flow process, can save the judgement time, improve treatment effeciency.
In the embodiment of the present invention, message receiver module 10 also for:
Whether the APS message that judges opposite equip. is legal, if illegal, abandons APS message.
In the present embodiment, some APS message also carries other information, such as device id, network connectivty etc., because the present embodiment is only for carrying APS agreement opposite equip. state, message receiver module 10 will be judged to be illegal packet for the APS message that does not carry opposite equip. state information, and abandon.In addition; some time; due to Network Abnormal or other reasons; causing the APS message receiving not is the message of the APS agreement opposite equip. transmission that local device is corresponding; whether correctly now can identify in APS message device id information by message receiver module 10; as incorrect, judge that this APS message is illegal, need abandon.The present embodiment, by the judgement of APS message validity, can avoid processing a large amount of junk information, effectively improves treatment effeciency.
As shown in Figure 6, Fig. 6 is the structural representation of APS APS transferring protocol state device in another embodiment of the present invention, and the APS APS transferring protocol state device that this embodiment mentions also comprises:
Path switching module 40, for being switched to Protection path by the operating path of local device.
After the present embodiment is DNR state by the APS state of local device by NR state transition; the path switching module 40 of local device by select path switching to Protection path; the path that now local device and opposite equip. are selected is Protection path; terminal device data flow keeps clear and does not interrupt, and can carry out follow-up proper communication.Meanwhile, the APS state of local device and the APS state of opposite equip. are consistent, and are DNR state, and according to APS agreement regulation, the state of terminal device can not move again, will remain on DNR state, has ensured lasting proper communication.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. an APS APS transferring protocol state method, is characterized in that, comprises step:
Receive the APS message of opposite equip. in APS APS agreement;
Whether the APS message that judges described opposite equip. is legal, if illegal, abandons described APS message;
The information of carrying from described APS message, obtain the APS state of opposite equip.;
Obtain the APS state of local device;
When described APS message legal, and the APS state of the opposite equip. that described APS message carries is irrevocable DNR state, and the APS state of described local device is unsolicited NR state, and when the request signal of this NR state is invalid signals, be DNR state by the APS state of described local device by NR state transition.
2. APS APS transferring protocol state method according to claim 1; it is characterized in that; the APS state of the described opposite equip. carrying when described APS message is irrevocable DNR state; and the APS state of described local device is unsolicited NR state; and when the request signal of this NR state is invalid signals, be that DNR state specifically comprises by the APS state of described local device by NR state transition:
Whether the APS state that judges described opposite equip. is DNR state;
In the time that the APS of described opposite equip. state is DNR state, the priority of the APS state of more described opposite equip. and local device.
3. APS APS transferring protocol state method according to claim 2, is characterized in that, described in the time that the APS of described opposite equip. state is DNR state, after the priority of the APS state of more described opposite equip. and local device, also comprises:
When the priority of the APS of described opposite equip. state is during higher than the priority of the APS state of local device, judge whether the APS state of described local device is NR state;
In the time that the APS of described local device state is NR state, judge whether the request signal of this NR state is invalid signals;
In the time that the request signal of described NR state is invalid signals, be DNR state by the APS state of described local device by NR state transition.
4. according to the APS APS transferring protocol state method described in claim 1 or 3, it is characterized in that, described is that DNR state also comprises afterwards by the APS state of described local device by NR state transition:
The operating path of described local device is switched to Protection path.
5. an APS APS transferring protocol state device, is characterized in that, comprising:
Message receiver module, for receiving the APS message of APS APS agreement opposite equip.; Also whether legal for judging the APS message of described opposite equip., if illegal, abandon described APS message;
State acquisition module, obtains the APS state of opposite equip. for the information of carrying from described APS message; Obtain the APS state of local device;
State transition module, legal for working as described APS message, and the APS state of the opposite equip. that described APS message carries is irrevocable DNR state, and when the APS state of described local device is unsolicited NR state, and when the request signal of this NR state is invalid signals, be DNR state by the APS state of described local device by NR state transition.
6. APS APS transferring protocol state device according to claim 5, is characterized in that, described state transition module specifically for:
Whether the APS state that judges described opposite equip. is DNR state;
In the time that the APS of described opposite equip. state is DNR state, the priority of the APS state of more described opposite equip. and local device.
7. APS APS transferring protocol state device according to claim 6, is characterized in that, described state transition module also specifically for:
When the priority of the APS of described opposite equip. state is during higher than the priority of the APS state of local device, judge whether the APS state of described local device is NR state;
In the time that the APS of described local device state is NR state, judge whether the request signal of this NR state is invalid signals;
In the time that the request signal of described NR state is invalid signals, be DNR state by the APS state of described local device by NR state transition.
8. according to the APS APS transferring protocol state device described in claim 5 or 7, it is characterized in that, also comprise:
Path switching module, for being switched to Protection path by the operating path of described local device.
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| CN201110384186.1A CN102420753B (en) | 2011-11-28 | 2011-11-28 | Automatic protection switching (APS) protocol state transition method and device |
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| CN201110384186.1A CN102420753B (en) | 2011-11-28 | 2011-11-28 | Automatic protection switching (APS) protocol state transition method and device |
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| CN102420753B true CN102420753B (en) | 2014-08-13 |
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| CN103888280B (en) * | 2012-12-20 | 2019-04-19 | 中兴通讯股份有限公司 | A kind of cross-domain path status machinery of consultation and node apparatus |
| CN103580932A (en) * | 2013-11-26 | 2014-02-12 | 盛科网络（苏州）有限公司 | Status switching method and system based on Ethernet linear protection switching |
| CN105227339B (en) * | 2014-07-02 | 2019-11-12 | 南京中兴新软件有限责任公司 | Automatic protection switching APS condition processing method, device and APS node |
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| CN101146115A (en) * | 2005-04-15 | 2008-03-19 | 华为技术有限公司 | Implementation method for bidirectional protective switching of multi-protocol label switching |
| CN101668235A (en) * | 2009-10-19 | 2010-03-10 | 国网信息通信有限公司 | Method for realizing M:N protection in T-MPLS network |
| CN101764714A (en) * | 2008-12-24 | 2010-06-30 | 华为技术有限公司 | Channel failure reversing method, node and signal transmission system |
| CN102148694A (en) * | 2010-02-04 | 2011-08-10 | 中兴通讯股份有限公司 | Linear 1-to-N protection method, device and system for packet transport network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100407725C (en) * | 2005-04-15 | 2008-07-30 | 华为技术有限公司 | Method for realizing multi-protocol tag exchange bidirectional protection switching |
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| CN101146115A (en) * | 2005-04-15 | 2008-03-19 | 华为技术有限公司 | Implementation method for bidirectional protective switching of multi-protocol label switching |
| CN101764714A (en) * | 2008-12-24 | 2010-06-30 | 华为技术有限公司 | Channel failure reversing method, node and signal transmission system |
| CN101668235A (en) * | 2009-10-19 | 2010-03-10 | 国网信息通信有限公司 | Method for realizing M:N protection in T-MPLS network |
| CN102148694A (en) * | 2010-02-04 | 2011-08-10 | 中兴通讯股份有限公司 | Linear 1-to-N protection method, device and system for packet transport network |
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