Mobile Terminal Handover Stability via Beacon Caching
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Solution Overview
Problem
Current mobile terminals face challenges in maintaining seamless connectivity during handovers across heterogeneous networks, particularly due to the transient nature of network coverage, leading to unnecessary handovers and disruptions in service.
Innovation Solution
The implementation of a radio communication terminal with a communication switch controlling means for fast interface switching, stability information storage and evaluation, and a message sending mechanism to improve communication stability, allowing for efficient handover and reduced unnecessary handovers by ranking base stations based on stability and sending requests for improved stability when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a mobile terminal performs handover across heterogeneous networks based on signal availability, then network coverage is extended, but unnecessary handovers occur due to transient network coverage
Solution Approach 1:
The terminal performs preliminary evaluation of base station stability before executing handover. The stability information storage means stores historical connection data, and the evaluation means assesses whether a base station provides stable coverage before the terminal commits to handover, preventing premature handovers to transient networks
Solution Approach 2:
The system implements feedback mechanisms where the terminal continuously monitors and evaluates base station stability, storing this information for future handover decisions. This feedback loop allows the terminal to learn from past connection experiences and make more informed handover choices, reducing unnecessary handovers
2Productivity
If a mobile terminal switches interfaces rapidly to maintain connectivity, then seamless communication is achieved, but communication stability deteriorates due to frequent handovers
Solution Approach 1:
The terminal evaluates base station stability in advance before switching interfaces. The stability evaluation means assesses potential target base stations using stored historical data, ensuring that interface switching occurs only to stable networks, thereby maintaining both continuity and stability
Solution Approach 2:
The terminal autonomously manages its own handover decisions by internally evaluating base station stability using its own stored historical data. This self-service mechanism allows the terminal to make intelligent decisions without external intervention, balancing continuity and stability based on its own experience
3Reliability
If a mobile terminal monitors multiple base stations continuously, then handover decisions are improved, but energy consumption increases
Solution Approach 1:
The terminal extracts only the essential stability evaluation data from continuous monitoring and stores it efficiently. Rather than processing all monitoring data in real-time, the system extracts key stability indicators and stores them for later use, reducing the computational burden and energy consumption during active monitoring
Solution Approach 2:
The terminal performs stability evaluations and stores results in advance during periods of lower activity. By pre-evaluating base station stability and caching this information, the terminal reduces the need for intensive real-time monitoring, thereby lowering energy consumption while maintaining handover decision quality
Data Source
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AI summary
A technology is disclosed for achieving fast and reliable handover. According to this technology, in the network composition where a network coverage area of the cellular base station 105 and network coverage areas of plural WLAN AP (Wireless LAN access point) 110, 115, 120 and 130 overlaps, the roaming mobile node (mobile terminal) 100 stores the listened beacon information from each WLAN AP. The mobile node can promptly perform the handover procedures without waiting for listening to the next beacon by acquiring the beacon information of WLAN AP which is a handover target from the stored information at the instant of determining to do handover to a new WLAN AP. Furthermore, the mobile node can store information on stability of the network connection if it would be connected to each WLAN AP, and determine which WLAN AP is suitable for a handover target by considering the stability.