TRIP Routing Table Update via Distance Vectors
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Solution Overview
Problem
Current network control systems for VoIP services lack efficient mechanisms for selecting IP telephony routes and scalability, particularly in TRIP-enabled environments, due to limitations in OSPF models and the inability to provide high-quality service (QoS) amidst network congestion.
Innovation Solution
A network control system that includes a processing system to update TRIP routing tables based on distance vectors, utilizing update messages from gateways to dynamically adjust routing paths and ensure optimal route selection between networks, thereby enhancing route scalability and quality of service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If OSPF model is used for route selection in TRIP-enabled environments, then routing information can be exchanged between routers, but the system lacks scalability and efficiency in selecting IP telephony routes
Solution Approach 1:
The patent changes the routing parameters from traditional OSPF metrics to distance vectors specifically calculated for IP telephony routes. Each router maintains a distance vector table that stores the cumulative distance to various destinations through intermediate routers, enabling more efficient and adaptable route selection for voice communications while maintaining system scalability.
2Ease of operation
If media gateways are strategically located to interface Internet telephony with PSTN, then call routing capability is improved, but location servers must continuously track and manage gateway locations and status
Solution Approach 1:
The patent implements a feedback mechanism where routers periodically exchange distance vector information with their neighbors, providing continuous updates about network topology and gateway accessibility. This feedback loop enables automatic adaptation to gateway location changes without requiring centralized tracking, reducing the management complexity while maintaining ease of operation.
3Adaptability or versatility
If TRIP protocol is implemented to provide next hop routing information, then IP network routing capability is improved, but the protocol must ride over telephony protocols like SIP or H.323 adding complexity
Solution Approach 1:
The patent merges the TRIP routing functionality directly into the IP layer by implementing distance vector routing natively in routers without requiring overlay on telephony protocols. This integration eliminates the need for separate TRIP protocol layers, reducing protocol complexity while maintaining the adaptability and versatility of routing information provision for IP telephony.
Data Source
AI summary
An embodiment of the invention includes a network control system for a communication network comprising a first interface configured to receive an update message wherein the update message indicates a status change of a first gateway and wherein the first gateway provides an interface between a first network and a second network, and a processing system configured to update a routing table based upon the update message and a distance vector associated with the first gateway wherein the routing table comprises a Telephony Routing over Internet protocol (TRIP) routing table.