Method for protection switching of geographically separate switching systems
DCFirst Claim
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1. A method for protection switching of geographically separate switching systems arranged in pairs, comprising:
- providing a pair of switching systems which are geographically separate and which supply a dedicated redundancy to each other, one of the pair of switching systems is in an active operating state and the other is in a hot-standby operating state;
controlling the communication between the each of the pair switching system and a monitoring unit in accordance with the an operating state of the respective switching system;
when a loss of the communication to the switching system in the active operating state occurs;
activating, by the monitoring unit, the switching system in the hot-standby operating state to be in the active operating state, and deactivating, by the monitoring unit, the switching system with the communication loss to be in the hot-standby operating state, wherein when in the hot-standby operating state, the respective switching system is not active in terms of switching functions; and
further features;
periodically sending an IP lease request to the monitoring unit by a packet-based interface of the switching system in the hot-standby operating state, the packet-based interface is in an inactive state.
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Abstract
A protocol is provided being executed with a redundancy of 1:1. As a result, an identical clone, with identical hardware, identical software and an identical data base, is allocated to each switching system to be protected, as a redundancy partner. Switching is carried out in a quick, secure and automatic manner by a superordinate, real-time enabled monitor which establishes communication with the switching systems which are arranged in pairs. In the event of communication loss with respect to the active communication system, real-time switching to the redundant switching system is carried out.
14 Citations
16 Claims
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1. A method for protection switching of geographically separate switching systems arranged in pairs, comprising:
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providing a pair of switching systems which are geographically separate and which supply a dedicated redundancy to each other, one of the pair of switching systems is in an active operating state and the other is in a hot-standby operating state; controlling the communication between the each of the pair switching system and a monitoring unit in accordance with the an operating state of the respective switching system; when a loss of the communication to the switching system in the active operating state occurs; activating, by the monitoring unit, the switching system in the hot-standby operating state to be in the active operating state, and deactivating, by the monitoring unit, the switching system with the communication loss to be in the hot-standby operating state, wherein when in the hot-standby operating state, the respective switching system is not active in terms of switching functions; and
further features;
periodically sending an IP lease request to the monitoring unit by a packet-based interface of the switching system in the hot-standby operating state, the packet-based interface is in an inactive state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for protection switching of geographically separate switching systems arranged in pairs, comprising:
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providing a pair of switching systems which are geographically separate and which supply a dedicated redundancy to each other, one of the pair of switching systems is in an active operating state and the other is in a hot-standby operating state, each of the pair of switching systems comprises a database which is identical to each other, the database comprises only permanent data and semi-permanent data such that transient data pertaining to calls is excluded; controlling the communication between the each of the pair switching system and a monitoring unit in accordance with the an operating state of the respective switching system; when a loss of the communication to the switching system in the active operating state occurs; activating, by the monitoring unit, the switching system in the hot-standby operating state to be in the active operating state, and deactivating, by the monitoring unit, the switching system with the communication loss to be in the hot-standby operating state, wherein when in the hot-standby operating state, the respective switching system is not active in terms of switching functions; and
further features;
periodically sending an IP lease request to the monitoring unit by a packet-based interface of the switching system in the hot-standby operating state, the packet-based interface is in an inactive state; and
ignoring the IP lease request by the monitoring unit while the switching system is in the hot-standby operating state. - View Dependent Claims (12, 13)
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14. A method for protection switching of geographically separate switching systems arranged in pairs, comprising:
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providing a pair of switching systems which are geographically separate and which supply a dedicated redundancy to each other, the pair of switching systems comprise software identical to each other, one of the pair of switching systems is in an active operating state and the other is in a hot-standby operating state; providing a monitoring unit that communicates with the pair of switching systems;
controlling the communication between the each of the pair switching system and a monitoring unit in accordance with the an operating state of the respective switching system;when a loss of the communication to the switching system in the active operating state occurs; activating, by the monitoring unit, the switching system in the hot-standby operating state to be in the active operating state, and deactivating, by the monitoring unit, the switching system with the communication loss to be in the hot-standby operating state, wherein every software update including patches is delivered in identical fashion to the first and redundant switching system, and wherein when in the hot-standby operating state, the respective switching system is not active in terms of switching functions; and
further features;
periodically sending an IP lease request to the monitoring unit by a packet-based interface of the switching system in the hot-standby operating state, the packet-based interface is in an inactive state; and
ignoring the IP lease request by the monitoring unit while the switching system is in the hot-standby operating state. - View Dependent Claims (15, 16)
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Specification