Handover Control Between Macro and Vehicular Base Stations
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Solution Overview
Problem
In wireless communication systems, existing technologies face challenges in seamlessly handing over mobile terminals between macro base stations and vehicular base stations, particularly in determining whether a mobile terminal is on board a vehicle and managing handovers based on vehicle motion and user preferences, leading to inefficient and redundant handovers.
Innovation Solution
The method involves receiving information on vehicle motion and mobile terminal status from vehicular base stations, using signal magnitude reports to determine handover decisions, and optimizing handovers by considering user preferences and communication types, allowing for personalized and adaptive handovers between macro and vehicular base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If handover decisions are made based solely on signal strength measurements, then handover responsiveness is improved, but redundant handovers occur when mobile terminals are not actually on board vehicles
Solution Approach 1:
The patent introduces an intermediary verification mechanism where the network side (macro base station) receives and verifies mobile terminal location information from the vehicular base station before executing handover. This intermediary check prevents redundant handovers by confirming whether the mobile terminal is actually on board the vehicle, thus resolving the contradiction between responsive handover and accurate handover decision-making.
2Measurement precision
If the system continuously monitors mobile terminal location to improve handover accuracy, then handover precision is improved, but system complexity and processing overhead increase
Solution Approach 1:
The patent applies preliminary action by having the vehicular base station prepare and transmit mobile terminal location information in advance before handover is needed. The macro base station receives this pre-prepared information and uses it for handover decisions, thereby achieving accurate location monitoring without requiring continuous real-time processing, thus reducing system complexity.
3Speed
If the macro base station executes handover immediately upon receiving vehicular base station information, then handover speed is improved, but handover reliability decreases due to insufficient verification
Solution Approach 1:
The patent implements feedback by having the macro base station receive mobile terminal location information from the vehicular base station and use this feedback information to verify whether handover should be executed. The macro base station processes this feedback and makes an informed decision, thus achieving both fast handover execution (when conditions are met) and high reliability (through verification), resolving the contradiction between speed and reliability.
Data Source
AI summary
Provided are a method and system for handing over a mobile terminal between a macro base station and a vehicular base station to secure a communication service of a movable mobile terminal in a wireless communication system supporting a vehicular base station such as a vehicular relay station. The mobile terminal may be handed over by selecting a network or a vehicular base station suitable to a mobility and type of communication.