Terminal Session Setup with Asymmetric Resource Reservation Timers
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Solution Overview
Problem
Existing session establishment methods between terminals fail to ensure quick and successful resource reservation, leading to unsuccessful session establishment due to insufficient computing or network resources, resulting in poor user experience.
Innovation Solution
Implementing timers for resource reservation acknowledgment and termination mechanisms in terminals, allowing for switching to alternative networks if resource reservation fails within specified durations, and extending the reservation time for called terminals to improve session success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the calling terminal or called terminal uses a standard timer duration for resource reservation, then the session establishment process is simple, but the resource reservation may fail due to insufficient time for network resources to be released and allocated
Solution Approach 1:
The patent applies dynamics by making the timer duration adjustable rather than fixed. The terminal can dynamically set different timer values based on network conditions and terminal capabilities. Specifically, the called terminal can be configured with a longer timer duration than the calling terminal, allowing flexible adaptation to resource availability without requiring a universally extended timer that would delay all sessions.
Solution Approach 2:
The patent changes the parameter of timer duration to resolve the contradiction. By allowing the timer value to be modified based on specific network conditions and terminal roles (calling vs. called), the system can extend the reservation time when needed to improve success rate, while maintaining shorter times in favorable conditions to avoid unnecessary delays.
2Reliability
If the terminal extends the timer duration for resource reservation, then the resource reservation success rate improves, but the session establishment time increases
Solution Approach 1:
The patent applies local quality by differentiating timer durations based on the terminal's role in the session establishment. The called terminal is configured with a longer timer duration compared to the calling terminal, allowing each terminal to have optimized timing characteristics suited to its specific function in the resource reservation process.
3Reliability
If the terminal switches to another mobile communication network when resource reservation fails, then the session establishment success rate improves, but the device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple mobile communication networks in the terminal before session establishment is needed. The terminal maintains a list of available networks and their characteristics in advance, so when resource reservation fails on one network, the terminal can quickly switch to a pre-evaluated alternative without complex real-time decision-making or extensive searching.
Data Source
AI summary
This application provides a session establishment method, a terminal, and a communication system. A first terminal sends, to a second terminal, a session request message used to request to establish a session; and the second terminal sends a session response message to the first terminal based on the session request message, and start a second timer. The first terminal starts a first timer after receiving the session response message. When the first terminal completes resource reservation for the session before duration recorded by the first timer reaches preset first duration, the first terminal sends a resource reservation completion acknowledgment message to the second terminal. The second terminal sends a ringing message to the first terminal if the second terminal completes resource reservation for the session before duration recorded by the second timer reaches preset second duration. The second duration is longer than the first duration.