Media Gateway Call Rerouting via Master Control Element
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Solution Overview
Problem
In next-generation networks and IMS networks, media gateways often experience disruptions due to protocol interface interruptions, leading to communication failures between users within an enterprise network, especially for large enterprises where multiple users are distributed across different media gateways, resulting in service isolation and communication breakdowns.
Innovation Solution
A method and system that employs a master control network element within a media gateway cluster to establish and manage user-number mappings, allowing media gateways to self-exchange and reroute calls when protocol interfaces are interrupted, ensuring continuous service by determining the correct media gateway for called parties and facilitating interactions among media gateways to maintain communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If media gateways are deployed under core network equipment in NGN or IMS networks, then network functionality and user access capability are improved, but communication reliability deteriorates when protocol interface interruptions occur between media gateways and core network equipment
Solution Approach 1:
The patent introduces a peer media gateway as an intermediary to mediate call routing when the core network equipment is inaccessible. Instead of directly relying on the core network equipment for all routing decisions, the system uses an available peer media gateway to forward calls, ensuring communication continuity despite interface interruptions between media gateways and core network equipment.
Solution Approach 2:
The system pre-establishes routing information and maintains local routing tables that enable media gateways to independently determine call routes without real-time core network equipment intervention. This preliminary preparation of routing data allows gateways to autonomously handle calls even when core network interfaces are interrupted.
2Reliability
If escape interfaces with additional hardware and external network interfaces are configured to ensure call continuity, then communication reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes existing media gateway interfaces multi-functional by enabling them to serve both normal core network communication and emergency peer-to-peer routing. The same protocol interfaces and network connections are used for both standard operations and fallback routing, eliminating the need for dedicated escape hardware interfaces and reducing overall system complexity.
Solution Approach 2:
Media gateways are equipped with autonomous decision-making capabilities to self-determine call routes using locally stored routing information. When core network interfaces are interrupted, gateways independently switch to peer media gateway routing without requiring additional external network interfaces or manual intervention, thereby simplifying the network architecture while maintaining reliability.
3Extent of automation
If media gateways rely on core network equipment for call routing, then centralized control is improved, but service availability deteriorates when protocol service interfaces are interrupted
Solution Approach 1:
The patent implements dynamic routing control where media gateways can switch between centralized core network equipment control and decentralized peer media gateway control based on real-time interface status. This dynamic adaptation allows the system to maintain centralized control during normal operations while automatically transitioning to distributed control when core network interfaces are interrupted, ensuring continuous service availability.
Solution Approach 2:
Routing information and gateway capability data are pre-distributed to all media gateways in advance, enabling them to independently make routing decisions when core network equipment becomes inaccessible. This preliminary distribution of control information maintains centralized control benefits during normal operations while ensuring service availability during interruptions.
Data Source
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AI summary
The present disclosure discloses a method and a system for implementing a call by a media gateway, comprising: setting a master control network element in a media gateway cluster, and establishing a mapping relationship between a user number and the media gateway in the master control network element (100); when the media gateway determines that an uplink protocol interface corresponding to a calling party is interrupted, the media gateway transmits a dialing tone to the calling party and acquires the called party number, and requests the master control network element to determine a media gateway to which the called party belongs; the master control network element determines the media gateway to which the called party belongs according to the mapping relationship stored therein, and informs the media gateway initiating the request; the call between the media gateway as a calling gateway that initiates the request and the determined media gateway to which the called party belongs is completed (103). In the method of the present disclosure, under the help of the master control network element, normal conversation services of the users of the media gateway can be guaranteed even if the protocol service interface between the media gateway and the core network equipment is interrupted through the interactions among the media gateways in the media gateway cluster.