Dynamic Gatekeeper Routing for VoIP Call Setup
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Solution Overview
Problem
Current VoIP and IP network mobility solutions either suffer from unfavorable 'trombone connections' and longer call set-up times when registering with the home Gatekeeper (GKH) or lack personalized features and emergency response efficiency when registering with the local visited Gatekeeper (GKV).
Innovation Solution
A method allowing simultaneous registration with both the home and visited Gatekeepers, with dynamic route selection based on priority criteria stored in a terminal rules table, enabling flexible and efficient call routing that leverages the advantages of both registration methods while minimizing their disadvantages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal registers with the home Gatekeeper (GKH), then personalized features and user profiles are available, but call set-up times increase and signaling paths become longer
Solution Approach 1:
The patent implements dynamic route selection that adapts the registration path based on call characteristics. The system dynamically chooses between direct routing (for speed) and home GK routing (for personalized features) using a rules table that evaluates multiple criteria including destination address, feature requirements, and current location, thereby resolving the contradiction between speed and personalization
Solution Approach 2:
The patent segments the routing decision into multiple independent criteria evaluated in a rules table. Each criterion (destination address, feature set, current location) is separately assessed and combined to determine the optimal path, allowing the system to balance the trade-off between call set-up time and personalized feature availability
2Productivity
If the terminal registers with the visited Gatekeeper (GKV), then call set-up times are shorter and signaling paths are more efficient, but personalized features and user profiles are not available
Solution Approach 1:
The system dynamically selects the registration path based on real-time evaluation of call requirements. When personalized features are not required, the system dynamically chooses the visited GK path for efficiency; when features are required, it switches to home GK path, thereby achieving both efficiency and adaptability
3Reliability
If the terminal registers with the home Gatekeeper (GKH), then user profile and class of service features are maintained, but emergency call response time may be delayed
Solution Approach 1:
The patent implements dynamic route selection that specifically addresses emergency calls by evaluating the nature of the call. When an emergency call is detected, the system dynamically overrides the default home GK routing and selects the visited GK path for immediate local response, while maintaining the ability to use home GK routing for non-emergency calls requiring personalized features
Solution Approach 2:
The patent applies different routing qualities to different call types. Emergency calls receive local priority routing through the visited GK for immediate response, while non-emergency calls can use home GK routing for personalized features. This local quality differentiation resolves the contradiction between profile maintenance and emergency response
Data Source
AI summary
A method of communicating between a user and a network, the method comprising registering with a first central control unit in a first area; registering with a second central control unit in a second area; wherein the second registration is valid concurrently with the first registration; defining a set of priorities by which each control unit determines route selection for a call; and routing a call via the first or second control unit accordingly.