CN101247213A - Method and system for master/standby rearrangement - Google Patents

Method and system for master/standby rearrangement Download PDF

Info

Publication number
CN101247213A
CN101247213A CNA2007100793978A CN200710079397A CN101247213A CN 101247213 A CN101247213 A CN 101247213A CN A2007100793978 A CNA2007100793978 A CN A2007100793978A CN 200710079397 A CN200710079397 A CN 200710079397A CN 101247213 A CN101247213 A CN 101247213A
Authority
CN
China
Prior art keywords
unit
main
business
stand
message
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2007100793978A
Other languages
Chinese (zh)
Inventor
杨胜强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CNA2007100793978A priority Critical patent/CN101247213A/en
Priority to PCT/CN2008/070265 priority patent/WO2008101430A1/en
Publication of CN101247213A publication Critical patent/CN101247213A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/12Arrangements for remote connection or disconnection of substations or of equipment thereof
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/50Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

The present invention relates to communication technology field, especially relates to a method and system for switching main and stand-by, switching between the method is: original main unit and original stand-by unit is triggered with main standby redundant function, the original stand-by unit transmits switching complete message to service unit which has service relation with original main unit after becoming new main unit, when the service unit receives switching complete message, service connection of new main unit is re-established, or service connection for original main unit is switched into new main unit, executes service connection with new main unit. The present invention can avoid time consuming chain breaking testing for service unit which has service relation with main unit after switching is completed between main unit and stand-by unit, so service interruption time is shorten effectively in the process of main standby switching.

Description

A kind of main and system
Technical field
The present invention relates to communication technical field, relate in particular to a kind of main and system.
Background technology
Along with developing rapidly of telecommunication technology, many telecommunication systems need constantly upgrade to telecommunication system or telecommunication apparatus, and telecommunication apparatus may be pinpointed the problems in running for expanded function and Added Business, when dealing with problems, need upgrade and replace equipment.But telecommunication apparatus to reliability requirement than higher, general telecommunication apparatus all requires 99.999% reliability, just only allow about 5 minutes break period every year, service outage duration when how to reduce device upgrade or fault is the thing that telecom equipment manufacturers and operator pay special attention to always.Usually improve reliability with carrying out masterslave switchover between two unit with master-slave redundancy at present, active and standby unit switches the business to stand-by unit automatically by masterslave switchover mechanism when upgrading or lead with cell failure, ensure that the service outage duration of whole system is short as far as possible.
Be example with two veneers below with master-slave redundancy, in prior art, masterslave switchover between two unit describes: be the reliability that guarantees in the telecommunication apparatus use, System Control Center is carried out the main and standby boards Redundancy Design, main and standby boards is inserted in the machine frame adjacent slot position of same switch, have only the master to establish communication link during operate as normal with veneer and outside other service boards, standby board generally has two communication links, article one, be and the main communication link of setting up with veneer, another is and OMU (Operation﹠amp; Maintenance Unit, Operation and Maintenance Unit) communication link of setting up is responsible for transmitting operation maintenance command and is given standby board.Under normal situation, the master is responsible for finishing miscellaneous service with veneer, and key state information is saved on the standby board by the backup path between the main and standby boards, when leading with single board default or carrying out edition upgrading, when main and standby boards is switched, the master uses board resetting, standby board upgrades to the main veneer of using, take over former main work with veneer, there is the veneer of business relations to be checked through and the former main veneer communicating interrupt of using with former master with veneer, again initiate to set up the process of communication link, when all and former master have the veneer of business relations to set up communication link with new master with veneer again with veneer, system just can operate as normal.
But, the method of present this active/standby single board changeover, when main and standby boards is switched, have the veneer of business relations to need spended time to be used to detect with veneer and former main communicating interrupt process with veneer with former master, communication link operated by rotary motion detection time is in level second, even more than 10 seconds, if communication link setting detection time is too short, some normal delay jitter erroneous judgements can be chain rupture, cause the frequent chain rupture of system to be rebuild, cause system's instability on the contrary.
Summary of the invention
The technical problem that the embodiment of the invention will solve provides a kind of main and system, can improve the efficient of masterslave switchover, shortens time of service interruption when masterslave switchover takes place.
For solving the problems of the technologies described above, the purpose of the embodiment of the invention is achieved through the following technical solutions:
The embodiment of the invention provides a kind of main, comprising:
Trigger former main with the switching of unit and former stand-by unit, described former stand-by unit be upgraded to new master with the unit after to retransmission unit transmission message;
There is the business unit of business relations to receive the described message that described retransmission unit sends with former master with the unit;
Described new master receives the service connection request of described business unit with the unit and sets up professional the connection.
The embodiment of the invention also provides a kind of system of masterslave switchover, comprising:
Comprise: main with unit, stand-by unit, retransmission unit;
Main use the unit, when being used for switching, switch the business to stand-by unit with described stand-by unit;
Stand-by unit is used to be upgraded to new master and sends message to described retransmission unit after with the unit;
Retransmission unit is used for receiving and transmitting described message, when receiving service connection request message, notifies described new master to carry out business with the unit and connects.
Another embodiment of the present invention provides a kind of main, comprising:
Trigger former main with the switching of unit and former stand-by unit, described former stand-by unit be upgraded to new master with the unit after to the business unit transmission message of business relations is arranged with the unit with former master;
Described business unit receives the message that described new master sends with the unit, will be connected with described former main business with the unit to switch to described new master and use the unit.
Another embodiment of the present invention also provides a kind of system of masterslave switchover, comprising: main with unit, stand-by unit, Service Processing Unit;
Main use the unit, when being used for switching, switch the business to stand-by unit with described stand-by unit;
Stand-by unit is used to be upgraded to new master and sends to described Service Processing Unit after with the unit and switch end;
Service Processing Unit is used for the described end of switching that described new master sends with the unit, will be connected with described former main business with the unit to switch to described new master and use the unit.
Above technical scheme as can be seen, since the embodiment of the invention by former main finish between with unit and former stand-by unit switch after, initiatively to having the business unit of business relations to send message with the unit with former master, with former master the business unit of business relations is arranged with the unit, when receiving described message, rebulid with new master and be connected with the business between the unit, perhaps will be connected and switch to the new main unit of using with former main business with the unit, thereby make business unit not need to carry out the chain rupture detection after switching main finishing with unit and stand-by unit, and the chain rupture testing process is more consuming time, and then effectively shortened in the process of masterslave switchover time of service interruption.
Description of drawings
Fig. 1 is the flow chart of the embodiment of the invention;
Fig. 2 is the signaling process figure of the embodiment of the invention one;
Fig. 3 is the system block diagram of the embodiment of the invention one;
Fig. 4 is the signaling process figure of the embodiment of the invention two;
Fig. 5 is the system block diagram of the embodiment of the invention two.
Embodiment
The embodiment of the invention provides a kind of main and system, for making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Referring to Fig. 1, a kind of main that the invention process is provided is carried out describe, in general terms below:
101: need upgrading when having the main of master-slave redundancy function with unit and stand-by unit, when perhaps the master can not receive the data of the business unit transmission that business relations is arranged with it with the unit, trigger described main with switching between unit and the described stand-by unit;
102: with described master with the switching services on the unit to described stand-by unit, described master resets with the unit, described stand-by unit is upgraded to new master and uses the unit, takes over former main work with the unit, and initiatively to having the business unit of business relations to send message with former master with the unit;
103: have the business unit of business relations to receive described message with the unit with described former master, enter with new main with the professional process that is connected of unit foundation, there is the business unit of business relations to be connected to switch to the unit with former master and newly mainly uses the unit, perhaps rebulid with new main business and be connected with the unit with described former main business with the unit;
104: when having the business unit of business relations to receive described reconstruction or handover success message with described former master with the unit, Xiang Xinzhu sends response message with the unit.
Wherein, described message is broadcast or to described message is sent to business unit separately.
Wherein, described message is for switching end, this is switched can carry new main address information and the former main element address information of using with the unit in the end, when not carrying address information, be defaulted as and newly main equal the former element address information of using of leading with element address information, perhaps having with the unit on the business unit of business relations with former master has had corresponding configuration.
Wherein, described main with unit and stand-by unit can for: two veneers of active and standby branch are arranged, two equipment of active and standby branch are perhaps arranged, two systems of active and standby branch are perhaps arranged.
The present invention is described in detail to enumerate embodiment below respectively:
Referring to Fig. 2, the signaling process figure of a kind of masterslave switchover that provides for the embodiment of the invention one is elaborated below:
201: former main using carried out the main processing of liter fully between unit and the former stand-by unit, the former main switching services of unit of using is arrived former stand-by unit, and former stand-by unit is upgraded to the new main unit of using;
202: new master sends message with the unit to retransmission unit, and for example, this message is for switching end;
203: the described end of switching that described retransmission unit will receive sends to the business unit that business relations is arranged with the unit with former master;
204: have the business unit of business relations to receive the described end of switching with former master with the unit, rebulid with described new main business and be connected with the unit;
205: with the unit business unit of business relations is arranged with former master, with new main with after finishing professional rebuliding of being connected between the unit, Xiang Xinzhu switches the end response message with the unit transmission.
Wherein, described main with unit and stand-by unit can for: two veneers of active and standby branch are arranged, two equipment of active and standby branch are perhaps arranged, two systems of active and standby branch are perhaps arranged.For example, main is be inserted in same machine frame adjacent slot position main with veneer and standby board with unit and stand-by unit, described master breaks down when maybe needing to upgrade with veneer, described main with switching between veneer and the standby board, discern according to described slot number or port numbers, with described master with the switching services on the veneer to standby board, the master reduces to new standby board with veneer, standby board is upgraded to the new main veneer of using, the service board of business relations is arranged according to new main slot number or port numbers with veneer with former master with veneer, rebulid with new main business and be connected with veneer, and Xiang Xinzhu switches the end response message with the veneer transmission, new main receive described switching when finishing response message with veneer, new main with carrying out business relations between veneer and the service board.
Wherein, described former master externally can have identical address or different addresses with the unit with former stand-by unit.When former main with the external address of unit and former stand-by unit when identical, the business unit of business relations is arranged in the time can not carrying out business relations with the unit with the unit with former master with former master, what send switches in the end, can carry address information, when not carrying address information, with be configured corresponding address information in the main business unit that business relations arranged with the unit, perhaps be defaulted as new main address information and equal former main address information with the unit with the unit, with the unit business unit of business relations is arranged with former master, rebulid with the business of newly leading according to former main address and be connected with the unit with the unit.Main the business unit that business relations is arranged with former master with the unit is according to new main address with the unit with the external address of unit and former stand-by unit not simultaneously when former, rebulids with new master to be connected with the business of unit.
Wherein, described address can also can be logical address for physical address.
Referring to Fig. 3, the system block diagram of a kind of masterslave switchover that the embodiment of the invention one provides, described system specifically comprises: main with unit 301, stand-by unit 302, retransmission unit 303;
Main with unit 301, be used for can not receiving data when described main breaking down with unit 301, when perhaps needing to upgrade, switch the business to stand-by unit 302;
Stand-by unit 302, be used for when with described main finish with unit 301 switch after, be upgraded to the new main unit of use, and initiatively to described retransmission unit 303 transmission message, for example, this message is for switching end;
Retransmission unit 303 is used to receive and transmit the described message that described stand-by unit 302 sends, and when receiving service connection request message, notifies described new master to carry out business with the unit and connects.
Wherein, described system further comprises: business unit 304, be used to receive the message that described retransmission unit sends, and rebulid with described new main business and be connected, and send response message with the unit to described new master with the unit.
Wherein, described retransmission unit can directly be transmitted the described message that receives, and also can handle the back and send.
Wherein, described main with unit 301 and stand-by unit 302 can for: two veneers of active and standby branch are arranged, two equipment of active and standby branch are perhaps arranged, two systems of active and standby branch are perhaps arranged.For example, when the master uses veneer and standby board with unit 301 and stand-by unit 302 for the master who is inserted in same machine frame adjacent slot position, described master breaks down when maybe needing to upgrade with veneer, described main with switching between veneer and the standby board, discern according to described slot number or port numbers, with described master with the switching services on the veneer to standby board, the master reduces to new standby board with veneer, standby board is upgraded to the new main veneer of using, the service board of business relations is arranged according to new main slot number or port numbers with veneer with former master with veneer, rebulid with new main business and be connected with veneer, and Xiang Xinzhu switches the end response message with the veneer transmission, new main with veneer receive described switch finish response message after, new main with carrying out business relations between veneer and the service board.
Referring to Fig. 4, the signaling process figure of a kind of masterslave switchover that provides for the embodiment of the invention two is elaborated below:
401: former main using carried out the main processing of liter fully between unit and the former stand-by unit, the former main switching services of unit of using is arrived former stand-by unit, and former stand-by unit is upgraded to the new main unit of using;
402: to having the business unit of business relations to send message with former master with the unit, for example: this message is for switching end with the unit for new master;
403: with the unit business unit of business relations is arranged with former master, receive describedly when switching end, will be connected with former main business and switch to new leading and use the unit with the unit;
404: after finishing the professional switching that connects, business unit sends with the unit to new master and switches the end response message, carries out business relations with new master with the unit.
Wherein, described main with unit and stand-by unit can for: two veneers of active and standby branch are arranged, two equipment of active and standby branch are perhaps arranged, two systems of active and standby branch are perhaps arranged.
Wherein, described master externally has different addresses with the unit with stand-by unit, and described address can also can be logical address for physical address.
Referring to Fig. 5, the system block diagram of a kind of masterslave switchover that provides for the invention process two, described system specifically comprises: main with unit 301, stand-by unit 302, Service Processing Unit 305;
The main unit 301 of using is used for carrying out business relations with described Service Processing Unit 305, when described main breaking down with unit 301 can not receive data, when perhaps needing to upgrade, switches the business to described stand-by unit 302;
Stand-by unit 302, be used for described main finish switching services with unit 301 after, be upgraded to the new main unit of use, and initiatively to described industry processing affair unit 305 transmission message, for example, this message is for switching end;
Service Processing Unit 305 is used to receive described when switching end, will switch to new leading and use the unit with main the connection with the business between the unit 301, and switch the end response message to described new master with the unit transmission.
Wherein, described system further comprises: service response unit 306, be used to receive the handover success message that business that described Service Processing Unit sends connects after, send with the unit to described new master and to switch the end response message.
Wherein, described Service Processing Unit 305 can place business unit 304 with described service response unit 306.
Wherein, described main with unit 301 and stand-by unit 302 can for: two veneers of active and standby branch are arranged, two equipment of active and standby branch are perhaps arranged, two systems of active and standby branch are perhaps arranged.
Wherein, the message described in the various embodiments described above can be broadcast, also described message can be sent to business unit separately.
The foregoing description as can be seen, because the embodiment of the invention is by after finishing switching services between the master with master-slave redundancy function is with unit and stand-by unit, initiatively to the cell broadcast message of business relations is arranged with the unit with former master, with described former master the unit of business relations is arranged with the unit, to be connected with former main business when receiving described message to switch to and newly mainly use the unit, and perhaps rebulid with new main business and be connected with the unit with the unit.Detect thereby make each business unit not need to carry out chain rupture, and the chain rupture testing process is more consuming time, and then has effectively shortened in the process of masterslave switchover time of service interruption.
More than a kind of main and system that the embodiment of the invention provided are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (12)

1. a main is characterized in that, comprising:
Trigger former main with the switching of unit and former stand-by unit, described former stand-by unit be upgraded to new master with the unit after to retransmission unit transmission message;
There is the business unit of business relations to receive the described message that described retransmission unit sends with former master with the unit;
Described new master receives the service connection request of described business unit with the unit and sets up professional the connection.
2. method according to claim 1 is characterized in that, described foundation further comprises with new main the connection with the business between the unit afterwards: send response message to described new master with the unit.
3. method according to claim 1 is characterized in that, described message is broadcast.
4. method according to claim 1 is characterized in that described message is for switching end.
5. the system of a masterslave switchover is characterized in that, comprising: comprising: main with unit, stand-by unit, retransmission unit;
Main use the unit, when being used for switching, switch the business to stand-by unit with described stand-by unit;
Stand-by unit is used to be upgraded to new master and sends message to described retransmission unit after with the unit;
Retransmission unit is used for receiving and transmitting described message, when receiving service connection request message, notifies described new master to carry out business with the unit and connects.
6. system according to claim 5 is characterized in that, comprising: business unit, be used to receive the message that described retransmission unit sends, and rebulid with described new main business and be connected, and send response message with the unit to described new master with the unit.
7. a main is characterized in that, comprising:
Trigger former main with the switching of unit and former stand-by unit, described former stand-by unit be upgraded to new master with the unit after to the business unit transmission message of business relations is arranged with the unit with former master;
Described business unit receives the message that described new master sends with the unit, will be connected with described former main business with the unit to switch to described new master and use the unit.
8. method according to claim 7 is characterized in that, described foundation further comprises with new main the connection with the business between the unit afterwards: send response message to described new master with the unit.
9. method according to claim 7 is characterized in that, described message is broadcast.
10. method according to claim 7 is characterized in that described message is for switching end.
11. the system of a masterslave switchover is characterized in that, comprising: main with unit, stand-by unit, Service Processing Unit;
Main use the unit, when being used for switching, switch the business to stand-by unit with described stand-by unit;
Stand-by unit is used to be upgraded to new master and sends to described Service Processing Unit after with the unit and switch end;
Service Processing Unit is used for the described end of switching that described new master sends with the unit, will be connected with described former main business with the unit to switch to described new master and use the unit.
12. system according to claim 11, it is characterized in that, described system further comprises: the service response unit, be used to receive the handover success message that business that described Service Processing Unit sends connects after, send with the unit to described new master and to switch the end response message.
CNA2007100793978A 2007-02-16 2007-02-16 Method and system for master/standby rearrangement Pending CN101247213A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CNA2007100793978A CN101247213A (en) 2007-02-16 2007-02-16 Method and system for master/standby rearrangement
PCT/CN2008/070265 WO2008101430A1 (en) 2007-02-16 2008-02-03 A method for active/standby switching and a system thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2007100793978A CN101247213A (en) 2007-02-16 2007-02-16 Method and system for master/standby rearrangement

Publications (1)

Publication Number Publication Date
CN101247213A true CN101247213A (en) 2008-08-20

Family

ID=39709644

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2007100793978A Pending CN101247213A (en) 2007-02-16 2007-02-16 Method and system for master/standby rearrangement

Country Status (2)

Country Link
CN (1) CN101247213A (en)
WO (1) WO2008101430A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012155630A1 (en) * 2011-09-01 2012-11-22 中兴通讯股份有限公司 Method, device, and system for disaster recovery
CN103077091A (en) * 2012-12-28 2013-05-01 瑞斯康达科技发展股份有限公司 Method and system for master and standby interchangeable management
CN106470121A (en) * 2016-08-30 2017-03-01 锐捷网络股份有限公司 The upgrade method of virtual switch unit VSU system, device and VSU system
CN110557268A (en) * 2018-05-31 2019-12-10 华为技术有限公司 method and device for controlling transmission of Ethernet frame
CN111083521A (en) * 2019-12-27 2020-04-28 杭州当虹科技股份有限公司 RTMP release main/standby fast switching method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100539509C (en) * 2003-10-16 2009-09-09 华为技术有限公司 Masterslave switchover implementation method towards high-end switch
CN100395962C (en) * 2004-07-13 2008-06-18 华为技术有限公司 Method and system for equipment switching in communication system
CN100459601C (en) * 2005-06-23 2009-02-04 华为技术有限公司 Method for realizing active/standby gateway apparatus in network

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012155630A1 (en) * 2011-09-01 2012-11-22 中兴通讯股份有限公司 Method, device, and system for disaster recovery
CN103077091A (en) * 2012-12-28 2013-05-01 瑞斯康达科技发展股份有限公司 Method and system for master and standby interchangeable management
CN106470121A (en) * 2016-08-30 2017-03-01 锐捷网络股份有限公司 The upgrade method of virtual switch unit VSU system, device and VSU system
CN106470121B (en) * 2016-08-30 2019-09-20 锐捷网络股份有限公司 Upgrade method, device and the VSU system of virtual switch unit VSU system
CN110557268A (en) * 2018-05-31 2019-12-10 华为技术有限公司 method and device for controlling transmission of Ethernet frame
CN110557268B (en) * 2018-05-31 2021-01-29 华为技术有限公司 Method and device for controlling transmission of Ethernet frame
CN111083521A (en) * 2019-12-27 2020-04-28 杭州当虹科技股份有限公司 RTMP release main/standby fast switching method

Also Published As

Publication number Publication date
WO2008101430A1 (en) 2008-08-28

Similar Documents

Publication Publication Date Title
CN101488844B (en) Method and system for communication link switching control between boards and an interface board
CN101582797B (en) Management board and two-unit standby system and method
CN107070731B (en) Master-slave arbitration method and system
CN100428155C (en) Upgrading method of communication equipment
CN103384212A (en) Double-machine high availability scheme for communication application system and implementation thereof
CN101247213A (en) Method and system for master/standby rearrangement
CN101621819A (en) Information synchronization detection method for active-standby switching interface module, network element system and link
CN101667905A (en) Method and device for switching clock integrated circuit boards
CN100496030C (en) Integrated access media gateway device based on the high-available system
CN100386997C (en) Data transmission system and method between telecommunication equipments based on point-to-point connection
CN101207409B (en) Method for taking business turns and single board
CN116340058A (en) Master-slave switching method and device
CN100499500C (en) Method for realizing management for multistage communication device
US7724646B2 (en) System and method for implementing service switching
CN100490343C (en) A method and device for realizing switching between main and backup units in communication equipment
US20070252440A1 (en) Method and System for Providing Power
JP2010136038A (en) Transmitter, and method for switching system in redundant configuration
CN108270589B (en) Message processing method and related device
CN101431436B (en) Method and apparatus for signaling message transmission through Q.921 link
US6286112B1 (en) Method and mechanism for providing a non-stop, fault-tolerant telecommunications system
KR100291099B1 (en) How to Report Redundancy Status of Device Control Board
EP4084492A1 (en) A method, system and olt for dual-parenting pon protection
KR100255298B1 (en) Test method of channel element state
KR100275445B1 (en) The duplex communication path method of signaling message exchange system
KR101173562B1 (en) Automatic Switching Method for Operating Main Processor of Switching Center

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C12 Rejection of a patent application after its publication
RJ01 Rejection of invention patent application after publication

Open date: 20080820