Group-Based Handover for Mobile Terminals
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Solution Overview
Problem
Current handover methods in wireless networks, such as IEEE 802.16e, face challenges in reducing handover time and traffic load, particularly due to frequent re-scanning and increased probability of handover dropping, especially in mobile environments where rapid changes occur.
Innovation Solution
A group-based handover method where multiple mobile terminals share and utilize scan information from a lead terminal to efficiently perform handover, reducing the need for individual channel scanning and traffic on base stations by forming groups based on remaining time and signal strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual terminals perform independent channel scanning for handover, then each terminal can acquire accurate target base station information, but the handover time increases and traffic load on base stations increases
Solution Approach 1:
Multiple mobile terminals are grouped together and perform channel scanning collectively through a representative terminal. The scan results are shared among all group members, merging their individual scanning needs into a single coordinated action. This reduces redundant scanning operations and accelerates handover while maintaining reliable target base station information acquisition.
Solution Approach 2:
The system performs channel scanning in advance for groups of terminals that are likely to handover simultaneously. By conducting scanning operations beforehand and caching the results, terminals can execute handover faster without performing individual scanning at the moment of handover, thus reducing handover time while ensuring accurate target base station information is available.
2Adaptability or versatility
If multiple terminals perform individual channel scanning, then each terminal can independently select target base station, but the traffic load on base stations increases significantly
Solution Approach 1:
The patent merges the channel scanning operations of multiple terminals into a single collective action. One terminal in the group performs the scanning on behalf of all members, and the results are distributed to the entire group. This dramatically reduces the total traffic load on base stations while maintaining each terminal's ability to independently select target base station based on the shared scan information.
3Reliability
If terminals perform frequent re-scanning in mobile environments, then they can track rapid changes in base station availability, but the time overhead increases
Solution Approach 1:
The system performs channel scanning in advance and stores the results for group members to use during handover. This preliminary action eliminates the need for frequent re-scanning during actual handover events, as terminals can rely on pre-acquired scan information. This reduces time overhead while maintaining the ability to track base station availability changes through periodic updates.
Data Source
AI summary
Disclosed herein is a method for handover of a mobile terminal. In the method, a group of mobile terminals for handover is formed by grouping a plurality of mobile terminals. A first terminal of the group scans a target base station. One or more other terminals of the group perform handover to the target base station using the scan information of the first terminal.