CN101710846B - Method and device for protecting service in automatic switched optical network - Google Patents
Method and device for protecting service in automatic switched optical network Download PDFInfo
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- CN101710846B CN101710846B CN 200910250768 CN200910250768A CN101710846B CN 101710846 B CN101710846 B CN 101710846B CN 200910250768 CN200910250768 CN 200910250768 CN 200910250768 A CN200910250768 A CN 200910250768A CN 101710846 B CN101710846 B CN 101710846B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0876—Network utilisation, e.g. volume of load or congestion level
- H04L43/0882—Utilisation of link capacity
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Abstract
The invention discloses a method and a device for protecting a service in an automatic switched optical network. The method comprises that: all equipment in the whole network regularly performs link resource detection and each equipment masters the occupation condition of link resources in the whole network; and after the service is failed to be recovered, the source node equipment of the serviceperforms a service recovery operation again when knowing that the link resources required by the service exist in the whole network. Through the method for protecting the service of the invention, service recovery is realized and the service can be activated immediately when the link resources are recovered under the condition of no manual intervention. The device for protecting the service improves the functions and scheduling modes of a connection control module, a link resource management module and a protocol control module, avoids the defect in the prior art that the recovery action of acontrol plane in the intelligent optical network needs manually triggering after the service is failed to be recovered, shortens the interruption interval of the service and ensures the timeliness and smoothness of the service.
Description
Technical field
The present invention relates to ASON (Automatically Switched Optical Net-work, ASON) technical field, relate in particular to a kind of guard method and device of service in automatic switched optical network.
Background technology
Growth along with the optical transport network service amount, mode by the human configuration business in the conventional optical network more and more has been not suitable with the requirement of technical development, just under these circumstances, thus begin extensive use by automatically connect the alternately automatic exchange ASON of configuration service of signaling protocol.
Automatic Switched Optical Network Technology also claims ASON, not only can supply business by Quick, also can provide new route in existing network because of the purpose that administers and maintains, and sets up the new connection of following new route by protocol interaction afterwards.And business switched in the new connection from former connection, realize easily and efficiently the network optimization, thereby also realized the purpose of network management and maintenance.
In actual application, find after business breaks down; equipment itself be can do by myself provides first protection; when the safeguard measure that provides when equipment can't meet the demands; will trigger the recovery action of the control plane in the ASON; guarantee the unimpeded of business by setting up a new connection; but when whole network does not satisfy the recovery condition; when not having idle link circuit resource; business will be interrupted; and when the idle link resource appears in whole network again; can automatically not trigger the recovery action with the equipment of traffic aided yet; business still is in interrupt status; need this moment artificial transmitting order to lower levels to trigger the recovery action of the control plane in the ASON, cause professional break period long, make troubles to the user.
Summary of the invention
The technical problem to be solved in the present invention is; a kind of guard method and device of service in automatic switched optical network are provided; for in the ASON with the business of recovering attribute; overcome the defective that after the business recovery failure, needs the recovery of the control plane in manual activation ASON action in the prior art, and shortened professional break period.
The technical solution used in the present invention is that the guard method of described service in automatic switched optical network comprises:
The link circuit resource that whole network equipment is regularly carried out the link circuit resource detection and every equipment is grasped in the whole network takies situation;
After the business recovery failure, when the source node equipment of described business takies situation and learns the link circuit resource that has described service needed in the whole network according to the link circuit resource in the whole network of its grasp, re-start the business recovery operation.
Described whole network equipment regularly carries out the link circuit resource detection and makes every link circuit resource in equipment grasp the whole network take situation comprising:
Every equipment regularly detects link-local change in resources information and upgrades accordingly local resource information tabulation of preserving in the whole network, and described link-local change in resources information is notified to all the other equipment in the whole network.
Every equipment notifies the mode to all the other equipment in the whole network to be described link-local change in resources information in described the whole network: every equipment is notified described link-local change in resources information to all the other equipment in the whole network by the signaling network mode that floods of control plane;
The tabulation of all the other equipment in the whole network resource information that information updating is preserved separately according to described link-local change in resources.
When described source node equipment when described business takies situation and learns the link circuit resource that has described service needed in the whole network according to the link circuit resource in the whole network of its grasp, re-start the business recovery operation and comprise:
When the link circuit resource change information that has described link-local change in resources information and/or all the other equipment to send, when the business information that the source node equipment of described business is preserved in conjunction with this locality is judged the link circuit resource that has the service needed take this equipment as source node, re-start the business recovery operation.
Described local business information of preserving comprises: whether business is with recovery attribute and business whether to have fault.
The described process that re-starts the business recovery operation comprises:
From the source node equipment of described business, signaling by control plane is along the application link circuit resource of the path hop-by-hop of waiting to recover professional and issue intersection information, when after recovering professional all devices and please arrive link circuit resource and issue the intersection information success in all, business recovery successfully.
The present invention also provides a kind of protective device of service in automatic switched optical network, is arranged in every equipment of the whole network, and this device comprises:
The detection notice module, the link circuit resource that is used for regularly carrying out the total network links resources measurement and every equipment is grasped in the whole network takies situation;
Automatic service recovers module, when judging the link circuit resource of the service needed of the whole network existence take this equipment as source node for the situation that takies according to the link circuit resource in the whole network, re-starts the business recovery operation.
Described detection notice module comprises:
The link circuit resource detection module is used for regularly detecting link-local resource information change information and notice to the Link Resource Manager module;
The Link Resource Manager module, the link circuit resource change information that is used for sending according to described link-local change in resources information and all the other equipment upgrades local resource information tabulation of preserving, and described link-local change in resources information notified to the native protocol control module, the link circuit resource change information that described link-local change in resources information and all the other equipment are sent is announced to automatic service and is recovered module;
The agreement control module is used for by the signaling network of control plane described link-local change in resources information from flooding being arrived the whole network, and receives the link circuit resource change information that all the other equipment are sent.
Described automatic service recovers module and further comprises:
Link control module, be used for when the Link Resource Manager module is sent the link circuit resource change information that described link-local change in resources information and/or all the other equipment sends, when judging the link circuit resource that has the service needed take this equipment as source node in conjunction with local business information of preserving, re-start the business recovery operation.
Described local business information of preserving comprises: whether business is with recovery attribute and business whether to have fault.
Described agreement control module is further used for reserving link circuit resource by the signaling of control plane along the path hop-by-hop of waiting to recover professional;
Described link control module is further used in this locality to Link Resource Manager module application link circuit resource, transmits the plane to this locality and issues intersection information.
Adopt technique scheme, the present invention has following advantages at least:
The guard method of service in automatic switched optical network of the present invention and device, the link circuit resource that regularly carries out the total network links resources measurement and every equipment is grasped in the whole network takies situation; After the business recovery failure, when the source node equipment of described business is learnt the link circuit resource that has described service needed in the whole network, re-start the business recovery operation.Compared with the prior art; the guard method of business of the present invention; by the link circuit resource operating position in the whole network of regular detection; when link circuit resource becomes upstate by down state; in the situation that need not manual intervention; realize professional recovery, guarantee that the professional very first time after link circuit resource recovers is in time open-minded.The protective device of described business; comprise that detection notice module and automatic service recover module; in fact link control module, Link Resource Manager module and the agreement control module three's who every equipment in the ASON is all had function and scheduling mode improve; mutual by between each module; overcome the defective that after the business recovery failure, needs the recovery of the control plane in manual activation ASON action in the prior art; and shortened professional break period, guaranteed the in time unimpeded of business.
Description of drawings
Fig. 1 is the guard method flow chart of the described service in automatic switched optical network of first embodiment of the invention;
Fig. 2 is the protective device schematic diagram of the described service in automatic switched optical network of second embodiment of the invention;
Fig. 3 is the network connection schematic diagram that bearer service AC nonserviceables in the third embodiment of the invention;
Fig. 4 is the network connection schematic diagram that bearer service AC is returning to form in the third embodiment of the invention;
Fig. 5 is the network connection schematic diagram of bearer service AD in the fourth embodiment of the invention.
Embodiment
Reach technological means and the effect that predetermined purpose is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, guard method and the device of the described service in automatic switched optical network that the present invention is proposed are described in detail as follows.
First embodiment of the invention, a kind of guard method of service in automatic switched optical network as shown in Figure 1, comprises following concrete steps:
Every equipment regularly detects link-local change in resources information in step S101, the whole network.Because in the prior art, automatic switching optical network device itself just has mode by alarm to the function of control plane reporting fault, control plane has according to alarm, and the function that connects the operation judges link-local change in resources situation of setting up and deleting, the present invention does not do improvement to the specific implementation of this measuring ability, so locate not describe in detail.
Every equipment is regularly according to the local resource information tabulation of preserving of the link-local change in resources information updating that detects in step S102, the whole network.
Step S103, every equipment by control plane OSPF (Open Shortest Path First, Open Shortest Path First) agreement with described link-local change in resources information from flooding all the other equipment in the whole network.
The tabulation of all the other equipment in step S104, the whole network resource information that information updating is preserved separately according to described link-local change in resources.
Step S105, when the link circuit resource change information that has described link-local change in resources information and/or all the other equipment to send, the business information that equipment is preserved according to this locality judges whether to exist the link circuit resource of the service needed take this equipment as source node, if, then jump procedure S106 operates otherwise wouldn't carry out business recovery.
Step S106, from the source node equipment of described business begin by control plane signaling along the path hop-by-hop application link circuit resource of waiting to recover professional with issue intersection information, after all applying for link circuit resource wait all devices that recovers business and issuing the intersection information success, the business recovery success.
Second embodiment of the invention, a kind of protective device of service in automatic switched optical network is arranged in every equipment of the whole network, as shown in Figure 2, comprises following part:
The link circuit resource detection module is used for regularly detecting link-local resource information change information and notice to LRM (Link Resource Manager, Link resource manager) module;
The LRM module, the link circuit resource change information that is used for sending according to described link-local change in resources information and all the other equipment upgrades local resource information tabulation of preserving, and notify (the Protocol Control to local PC described link-local change in resources information, protocol controller) module, the link circuit resource change information that described link-local change in resources information and all the other equipment are sent is announced the module to CC (Connection Controller connects controller);
The PC module is used for by the signaling network of control plane described link-local change in resources information from flooding being arrived the whole network, and receives the link circuit resource change information that all the other equipment are sent.
The CC module, be used for when the LRM module is sent the link circuit resource change information that described link-local change in resources information and/or all the other equipment sends, when judging the link circuit resource that has the service needed take this equipment as source node according to the business information of this locality preservation, re-start the business recovery operation.Described local business information of preserving comprises: whether business is with recovery attribute and business whether to have fault.
When re-starting the business recovery operation, described PC module is further used for reserving link circuit resource by the signaling of control plane along the path hop-by-hop of waiting to recover professional;
The CC module of every equipment is further used in this locality to LRM module application link circuit resource, transmits the plane to this locality and issues intersection information.
Below in conjunction with two examples of occupation condition, specify the guard method of service in automatic switched optical network of the present invention and the implementation procedure of device.
Third embodiment of the invention is for the situation that is caused lacking in the network sufficient link circuit resource by equipment fault.As shown in Figure 3, the user has set up a business of recovering attribute from the band of the first device A to the three equipment C, and is professional referred to as AC.The connection of carrying AC business is through the first link 1, the second equipment B between the first device A and the second equipment B and the second link 2 between the 3rd equipment C.
Cause the second link 2, the 4th link 4 when the second equipment B breaks down, when the 6th link 6 all breaks, the second equipment B regularly detects the link-local resource information variation has occured, can notify LRM module to this locality local fault message, the LRM module will be deleted disabled link circuit resource in the local resource information list, and the link circuit resource change information of the second equipment B is passed to the PC module.Because the PC module by the signaling network work of control plane, is flooded to the first device A and the 3rd equipment C to the link circuit resource change information of the second equipment B at control plane by ospf protocol after the PC module receives.After the signaling network of the PC module of the first device A and the 3rd equipment C by control plane receives the link circuit resource change information of the second equipment B, report respectively LRM module separately.
According to prior art, because this AC business is recovered action with i.e. the first device A startup of the source node that recovers this AC business of attribute, because the link circuit resource between the first equipment B and the 3rd equipment C has been unavailable, thereby cause the business recovery failure.
When the second equipment B Failure elimination, when in the link between the second equipment B and the 3rd equipment C some or all of reparation being arranged, such as Fig. 4, such as the 6th link repair, the second equipment B can be notified LRM module to this locality this earth fault disappearance information so, local LRM module will be upgraded the local resource information list accordingly, and change in resources information is notified to local PC module, and local PC module is carried out flooding of the whole network by the ospf protocol of control plane again.The PC module of the first device A and the 3rd equipment C reports respectively LRM module separately after receiving the link circuit resource change information of the second equipment B by signaling network, and the LRM module will be upgraded the local resource information list accordingly.
For AC is professional, after receiving the change in resources information of the second equipment B as the LRM module of the first device A of the source node of business, can announce to the CC module, the business information that the CC module is preserved according to this locality in conjunction with the change in resources information of self and the second equipment B decides that to recover which bar professional, local information of preserving comprises: whether business is with the recovery attribute, and whether business exists fault etc.
When the CC module determines to recover the AC business, to local LRM module application link circuit resource, then transmit the plane to this locality and issue intersection information;
Next the PC module sends to the signaling that connects by control plane the PC module of the second equipment B of the link circuit resource that the carrying AC business can be provided, and is used for reserving link circuit resource; The PC module of the second equipment B reinforms the CC module of the second equipment B;
The CC module of the second equipment B also at local LRM module application link circuit resource, then transmits the plane and issues intersection information to this locality;
By that analogy, until provide the 3rd equipment C of the link circuit resource of carrying AC business to transmit the plane to this locality when issuing intersection information, the business recovery success.
Fourth embodiment of the invention is for the situation that is caused lacking in the network sufficient link circuit resource by equipment fault.As shown in Figure 5, the user has set up a business of recovering attribute from the band of the first device A to the four equipment D, be called for short AD professional, the connection of carrying this AD business arrives the link of the 4th equipment D through the first device A, the 3rd equipment C, be called for short the first active link ACD, also exist in the network from the second active link ABD of the first device A through the second equipment B to the four equipment D, the resource of the second active link ABD is all taken by other business, without idling-resource.At this moment, link occurs fault between the 3rd equipment C and the 4th equipment D, the 3rd equipment C can notify LRM module to this locality local fault message, local LRM module will be deleted disabled resource in the local resource information list, the LRM module of the 3rd equipment C has passed to local PC module with fault message, and local PC module is carried out the whole network by the ospf protocol of control plane with the link circuit resource change information again and flooded.The first device A, the second equipment B, the 4th equipment D obtain the information of inundation.
Because the AD business is with recovering attribute, according to prior art, the source node of AD business i.e. the first device A carries out the business recovery action, because this moment, Internet resources were saturated, recovers unsuccessfully.
Professional deleted fall of certain bar on the second active link ABD and after idling-resource occurring, the LRM module of the first device A, the second equipment B, the 4th equipment D is understood the resource information tabulation of each self refresh this locality and is notified PC module to separately with the link circuit resource change information, and PC module is separately carried out the whole network inundation by the ospf protocol of control plane again.For AD is professional, the source node of the AD business i.e. LRM module of the first device A is received the link circuit resource change information, the business information that the CC module is preserved according to this locality in conjunction with the change in resources information of self and the second equipment B, the 4th equipment D decides that to recover which bar professional, local information of preserving comprises: whether business is with the recovery attribute, and whether business exists fault etc.
When the CC module determines to recover the AD business, to local LRM module application link circuit resource, then transmit the plane to this locality and issue intersection information;
Next the PC module sends to the signaling that connects by control plane the PC module of the second equipment B of the link circuit resource that carrying AD business can be provided, and is used for reserving link circuit resource; The PC module of the second equipment B reinforms the CC module of the second equipment B;
The CC module of the second equipment B also at local LRM module application link circuit resource, then transmits the plane and issues intersection information to this locality;
By that analogy, until provide the 4th equipment D of the link circuit resource of carrying AD business to transmit the plane to this locality when issuing intersection information, the business recovery success.
The guard method of service in automatic switched optical network of the present invention and device, the link circuit resource that regularly carries out the total network links resources measurement and every equipment is grasped in the whole network takies situation; After the business recovery failure, when the source node equipment of described business is learnt the link circuit resource that has described service needed in the whole network, re-start the business recovery operation.Compared with the prior art; the guard method of business of the present invention; by the link circuit resource operating position in the whole network of regular detection; when link circuit resource becomes upstate by down state; in the situation that need not manual intervention; realize professional recovery, guarantee that the professional very first time after link circuit resource recovers is in time open-minded.The protective device of described business; comprise that detection notice module and automatic service recover module; in fact CC module, LRM module and the PC module three's who every equipment in the ASON is all had function and scheduling mode improve; mutual by between each module; overcome the defective that after the business recovery failure, needs the recovery of the control plane in manual activation ASON action in the prior art; and shortened professional break period, guaranteed the in time unimpeded of business.
By the explanation of embodiment, should be to reach technological means and the effect that predetermined purpose takes to be able to more deeply and concrete understanding to the present invention, yet appended diagram only provide with reference to the usefulness of explanation, the present invention is limited.
Claims (5)
1. the guard method of a service in automatic switched optical network, it is characterized in that, comprise: every equipment regularly detects link-local change in resources information and upgrades accordingly local resource information tabulation of preserving in the whole network, and described link-local change in resources information is notified to all the other equipment in the whole network;
After the business recovery failure, when the source node equipment of described business takies situation and learns the link circuit resource that has described service needed in the whole network according to the link circuit resource in the whole network of its grasp, re-start the business recovery operation;
When described source node equipment when described business takies situation and learns the link circuit resource that has described service needed in the whole network according to the link circuit resource in the whole network of its grasp, re-start the business recovery operation and comprise:
When the link circuit resource change information that has described link-local change in resources information and/or all the other equipment to send, when the business information that the source node equipment of described business is preserved in conjunction with this locality is judged the link circuit resource that has the service needed take this equipment as source node, from the source node equipment of described business, signaling by control plane is along the application link circuit resource of the path hop-by-hop of waiting to recover professional and issue intersection information, after all applying for link circuit resource wait all devices that recovers business and issuing the intersection information success, the business recovery success; Described local business information of preserving comprises: whether business is with recovery attribute and business whether to have fault.
2. the according to claim 1 guard method of described service in automatic switched optical network, it is characterized in that, every equipment notifies the mode to all the other equipment in the whole network to be described link-local change in resources information in described the whole network: every equipment is notified described link-local change in resources information to all the other equipment in the whole network by the signaling network mode that floods of control plane;
The tabulation of all the other equipment in the whole network resource information that information updating is preserved separately according to described link-local change in resources.
3. the protective device of a service in automatic switched optical network is arranged in every equipment of the whole network, and this device comprises:
The detection notice module, the link circuit resource that is used for regularly carrying out the total network links resources measurement and every equipment is grasped in the whole network takies situation;
Described detection notice module further comprises:
The link circuit resource detection module is used for regularly detecting link-local resource information change information and notice to the Link Resource Manager module;
Link Resource Manager module, the link circuit resource change information that is used for sending according to described link-local change in resources information and all the other equipment are upgraded local resource information tabulation of preserving;
The protective device of described service in automatic switched optical network comprises that also automatic service recovers module, described automatic service recovers module, when judging the link circuit resource of the service needed of the whole network existence take this equipment as source node for the situation that takies according to the link circuit resource in the whole network, re-start the business recovery operation;
Described automatic service recovers module and further comprises:
Link control module, be used for when the Link Resource Manager module is sent the link circuit resource change information that described link-local change in resources information and/or all the other equipment sends, when judging the link circuit resource that has the service needed take this equipment as source node in conjunction with local business information of preserving, from the source node equipment of described business, signaling by control plane is along the application link circuit resource of the path hop-by-hop of waiting to recover professional and issue intersection information, after all applying for link circuit resource wait all devices that recovers business and issuing the intersection information success, the business recovery success; Described local business information of preserving comprises: whether business is with recovery attribute and business whether to have fault.
4. the protective device of described service in automatic switched optical network according to claim 3 is characterized in that,
The Link Resource Manager module also is used for, and described link-local change in resources information is notified to the native protocol control module, and the link circuit resource change information that described link-local change in resources information and all the other equipment are sent is announced to automatic service recovery module;
Described detection notice module also comprises: the agreement control module is used for by the signaling network of control plane described link-local change in resources information from flooding being arrived the whole network, and receives the link circuit resource change information that all the other equipment are sent.
5. the protective device of described service in automatic switched optical network according to claim 4 is characterized in that, described agreement control module is further used for reserving link circuit resource by the signaling of control plane along the path hop-by-hop of waiting to recover professional;
Described link control module is further used in this locality to Link Resource Manager module application link circuit resource, transmits the plane to this locality and issues intersection information.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910250768 CN101710846B (en) | 2009-12-10 | 2009-12-10 | Method and device for protecting service in automatic switched optical network |
| PCT/CN2010/072354 WO2010148781A1 (en) | 2009-12-10 | 2010-04-30 | Protection method and device for service in automatically switched optical network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910250768 CN101710846B (en) | 2009-12-10 | 2009-12-10 | Method and device for protecting service in automatic switched optical network |
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| CN101710846A CN101710846A (en) | 2010-05-19 |
| CN101710846B true CN101710846B (en) | 2013-10-16 |
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| CN 200910250768 Active CN101710846B (en) | 2009-12-10 | 2009-12-10 | Method and device for protecting service in automatic switched optical network |
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| WO (1) | WO2010148781A1 (en) |
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| CN103248510B (en) * | 2012-02-14 | 2017-11-10 | 中兴通讯股份有限公司 | The method and apparatus that a kind of business recovers reactivation automatically |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1694418A (en) * | 2005-05-16 | 2005-11-09 | 烽火通信科技股份有限公司 | Method for combining multi-section protection and mesh network recovery |
| CN1983908A (en) * | 2006-06-13 | 2007-06-20 | 华为技术有限公司 | Method for automatically correcting label resource management |
| CN101321115A (en) * | 2007-06-07 | 2008-12-10 | 华为技术有限公司 | Method and system for establishing business route, and node equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6111672A (en) * | 1998-02-20 | 2000-08-29 | Mci Communications Corporation | Method, apparatus, and computer program product for optical network restoration |
| US6862452B2 (en) * | 2002-08-21 | 2005-03-01 | Qualcomm Inc. | System and method for piggybacking data across an open data channel of a wireless device |
| CN100531092C (en) * | 2005-01-25 | 2009-08-19 | 华为技术有限公司 | Intelligent optical network business re-routing trigging method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1694418A (en) * | 2005-05-16 | 2005-11-09 | 烽火通信科技股份有限公司 | Method for combining multi-section protection and mesh network recovery |
| CN1983908A (en) * | 2006-06-13 | 2007-06-20 | 华为技术有限公司 | Method for automatically correcting label resource management |
| CN101321115A (en) * | 2007-06-07 | 2008-12-10 | 华为技术有限公司 | Method and system for establishing business route, and node equipment |
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| CN101710846A (en) | 2010-05-19 |
| WO2010148781A1 (en) | 2010-12-29 |
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