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Method and system for service node redundancy

A redundant, master node technology, applied in transmission systems, digital transmission systems, electrical components, etc., to solve problems such as reducing the effectiveness of redundant solutions

Inactive Publication Date: 2007-02-14
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when doing so, node failures are no longer transparent to the external network, reducing the effectiveness of the redundancy solution

Method used

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  • Method and system for service node redundancy
  • Method and system for service node redundancy
  • Method and system for service node redundancy

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Embodiment Construction

[0023] The innovative teachings of the present invention will be described below with particular reference to various exemplary embodiments. It should be understood, however, that such embodiments provide only a few examples of the many advantageous uses of the innovative teachings of the present invention. In general, statements made in the specification of the present application do not necessarily limit any of the various aspects of the invention as claimed. Furthermore, some statements may apply to some inventive features but not to others. In the figures, the same reference numerals are used to designate the same or similar elements in the several figures.

[0024] Reference is now made to FIG. 1, which is an exemplary high level network diagram illustrating a network implementing a first preferred embodiment of the present invention. First shown in FIG. 1 is a Signaling System No. 7 (SS7) network 200 connected to two Signal Transfer Points (STPs) STP-1 102 and STP-2 10...

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Abstract

A method and processing node for processing node redundancy, wherein an unavailability of a processing node is first detected, and the linkset route to the unavailable node is inhibited by sending Transfer Prohibited (TFP) messages to Signal Transfer Point (STPs) adjacent to the unavailable node. Transfer Allowed (TFA) messages are sent to the STPs in order to enable an alternate linkset route to the secondary processing node, i.e. the standby backup node. A Virtual Service Address (VSA) is reassigned from the unavailable primary node to the remaining node that takes over the processing of the unavailable node and thus becomes the primary processing node. The unavailability of the processing node may be detected via a heartbeat mechanism between the two redundant nodes, or via receipt of TFP messages from the adjacent STPs. The method and processing node may be used in a hot standby configuration or in a load sharing configuration.

Description

technical field [0001] The present invention relates to methods and systems for providing service redundancy. Background technique [0002] In many applications based on Signaling System No. 7 (SS7) networks, network redundant service nodes are required. Network redundancy means that when one node becomes unavailable, its data processing is taken over by another node with little or no data loss during the switchover. Such cooperating nodes are said to be mutually redundant, such that each node can take over for a failed node should the other fail. In order to be able to cope with local and regional disasters (such as fire or earthquake) that may cause multiple nodes to fail simultaneously, these cooperating nodes are usually arranged to be separated by a given geographical distance. [0003] In a "hot standby" configuration, one of the two nodes can be designated for normal business processing, while the remaining node can be set to act as a passive hot standby node. If t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q3/00H04L12/24
CPCH04Q3/0079
Inventor W·罗M·克尔莱扎-莱斯科
Owner TELEFON AB LM ERICSSON (PUBL)
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