Mobile Switching Centre Server Roaming Traffic Routing
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Solution Overview
Problem
Current communication systems face inefficiencies in routing traffic and signalling for roaming subscribers, leading to increased delays and reduced call quality due to the necessity of circulating traffic through the home network, even when the roaming subscriber is located far away.
Innovation Solution
A method and system implemented in a network node, specifically a mobile switching centre server, that processes control traffic and allocates resources for data traffic, allowing it to selectively route connection establishment requests and reserve resources based on subscriber information, thereby bypassing the home network for roaming subscribers and routing traffic through the nearest multimedia gateway, reducing latency and enhancing call quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traffic is routed through the home network for roaming subscribers, then call control and signalling can be maintained, but traffic routing efficiency deteriorates and delays increase
Solution Approach 1:
The patent segments the routing path into two independent parts: signalling traffic continues to route through the home network (H-NMSC) for reliable call control, while user traffic is routed directly through the visited network's multimedia gateway (V-MGW) to the destination. This segmentation allows each type of traffic to take the optimal path for its specific requirements, resolving the contradiction between reliability and speed.
Solution Approach 2:
The H-NMSC acts as an intermediary that establishes the direct user traffic path between the V-MGW and destination while maintaining signalling control. The intermediary enables the V-MGW to forward user traffic directly without requiring it to pass through the home network, thus reducing delay while preserving call control reliability.
2Reliability
If traffic is routed through the home network, then connection management can be maintained, but call quality deteriorates due to increased latency
Solution Approach 1:
The patent separates signalling traffic and user traffic into different routing paths. Signalling traffic maintains its path through the home network for reliable connection management, while user traffic takes a direct path through the visited network's multimedia gateway, eliminating unnecessary hops and reducing latency that degrades call quality.
Solution Approach 2:
The patent applies local quality by allowing the visited network's multimedia gateway to handle user traffic locally without requiring it to traverse the entire home network. This local handling optimizes the quality of user traffic by minimizing transmission distance and latency, while the home network continues to provide reliable connection management for signalling.
3Productivity
If traffic is routed through the nearest multimedia gateway, then routing efficiency improves, but network complexity increases
Solution Approach 1:
The H-NMSC performs preliminary action by pre-establishing the direct user traffic path between the V-MGW and destination during the call setup phase. By preparing this direct path in advance through signalling exchanges, the system enables efficient user traffic routing without requiring complex real-time routing decisions, thus improving routing efficiency while managing network complexity.
Solution Approach 2:
The H-NMSC serves as an intermediary that coordinates the direct routing arrangement between the V-MGW and destination. It establishes the necessary signalling connections and permissions for direct user traffic flow, thereby enabling routing efficiency improvements without requiring each network element to independently manage complex routing logic.
Data Source
AI summary
When a connection is established between user terminals in a system supporting the separation of control traffic and user traffic into separate network nodes, the routing of user traffic is optimized by not reserving resources for the user traffic in the home network (H-MSC) of a user terminal if the user terminal is roaming (4-8).