Callback Token Mechanism for Dropped Call Re-establishment
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Solution Overview
Problem
Existing communications systems struggle to reliably re-establish dropped calls due to various factors such as network coverage limitations, handoff issues, interference, and terminal mobility.
Innovation Solution
The system employs a token-based mechanism where terminals publish their parameters, and token values are determined through a weighted sum. If a call drops, the terminal with the largest token value initiates a callback to re-establish the connection, with the network optionally serving as a proxy for legacy terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional signal booster systems are deployed to reduce dropped calls, then call reliability improves, but network complexity and cost increase
Solution Approach 1:
The terminal autonomously determines token values based on published parameters and initiates callback procedures without requiring external network intervention. The terminal itself performs the functions of detecting dropped calls, calculating tokens, and re-establishing connections, eliminating the need for complex network-side signal boosting infrastructure.
Solution Approach 2:
A token-based mechanism serves as an intermediary that coordinates callback initiation among multiple terminals. Instead of deploying physical signal boosters, the system uses logical token passing and weighted parameter evaluation to manage call re-establishment, reducing hardware complexity while maintaining reliability.
2Reliability
If multiple terminals participate in call re-establishment, then call reliability improves, but processing requirements at terminals increase
Solution Approach 1:
Terminals publish their parameters in advance before the call drops. This preliminary action allows other terminals to calculate token values based on pre-available information, eliminating the need for complex real-time processing during the critical call re-establishment phase and reducing terminal processing burden.
Solution Approach 2:
The system segments the call re-establishment process into distinct phases: parameter publishing, token calculation, and callback initiation. By dividing the complex multi-terminal coordination into manageable segments with clear responsibilities, each terminal's processing requirements are reduced while maintaining overall system reliability.
3Ease of operation
If automatic callback is implemented to re-establish dropped calls, then user experience improves, but network signaling overhead increases
Solution Approach 1:
Instead of implementing full automatic callback for all dropped calls, the system uses token-based selective initiation where only the terminal with the highest token value attempts re-establishment. This partial action approach provides good user experience for critical calls while avoiding unnecessary signaling overhead for less important connections.
Solution Approach 2:
The system changes parameters from traditional binary call states (connected/disconnected) to a multi-level token value system. By evaluating multiple parameters (signal strength, call duration, user preferences) and converting them into weighted token values, the system optimizes signaling usage while maintaining user experience quality.
Data Source
AI summary
A method and system that support re-establishing a dropped call or communication is disclosed. A terminal may publish its parameters to other terminals through in-band or out-of-band signaling. Token values may then be determined by a weighted sum of parameters, where the terminal having the largest weighted sum possesses the token. If the call or communication drops, the terminal possessing the token then initiates communication to the other terminals. In addition, a plurality of tokens may be used when there are more than two terminals in a call. The terminals may be partitioned into groups, where one of the terminals in each group possesses a token.