Mobile Controller for Group Handover Coordination
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Solution Overview
Problem
In cellular or trunked mobile communication systems, mobile stations often experience delayed or lost service during cell re-selection or handover, particularly when moving, which can be critical in maintaining communication.
Innovation Solution
A controller coordinates at least two mobile stations on a moving object to communicate with base stations, receiving information about available base stations and making decisions to ensure continuous communication links by issuing instructions for optimal cell re-selection and handover, thereby maintaining connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mobile stations operate independently during cell re-selection or handover, then each station can autonomously manage its connection, but service delay or loss occurs and communication reliability deteriorates
Solution Approach 1:
The patent combines the autonomous operation capability of individual mobile stations with centralized coordination through a controller. Multiple mobile stations on a moving vehicle work together under the controller's coordination to perform cell re-selection and handover as a group, merging individual autonomy with collective optimization to maintain continuous service.
Solution Approach 2:
The controller receives feedback from mobile stations about their signal conditions and handover status, then issues instructions to coordinate handover decisions. This feedback mechanism enables the system to adapt to changing conditions and maintain communication reliability while allowing stations to operate autonomously when conditions permit.
2Device complexity
If mobile stations perform cell re-selection or handover independently, then the procedure can be executed without centralized control, but service may be delayed or lost during the transition
Solution Approach 1:
The controller performs preliminary actions by receiving information about available base stations from mobile stations before handover occurs, and by coordinating the handover process in advance. This allows the system to prepare for transitions and minimize service delay while maintaining a relatively simple control structure.
Solution Approach 2:
The controller acts as an intermediary between mobile stations and the network infrastructure. It receives handover information from stations, processes this information, and issues coordinated instructions, thereby reducing service delay without requiring complex centralized control of all station operations.
3Reliability
If a controller coordinates multiple mobile stations for group handover, then communication reliability and service continuity improve, but the control system becomes more complex
Solution Approach 1:
The controller is designed with multi-functionality, handling tasks such as receiving base station information from multiple stations, processing handover decisions, and issuing coordinated instructions. This universal approach improves reliability through coordinated group handover while avoiding the need for overly complex specialized systems for each function.
Data Source
AI summary
A mobile communication system is described. The system has an infrastructure that includes base stations and has mobile stations, a mobile terminal and a mobile controller. Each mobile station is operable to communicate with one of the base stations. The mobile terminal is coupled to first and second mobile stations to provide a communication link to at least one of the base stations. The mobile controller sends instruction messages to the mobile stations regarding connectivity with the base stations. The mobile terminal, the mobile controller and the first and second mobile stations are carried on a moving object. The mobile controller makes decisions and issues instructions to the mobile stations relating to the base station by which they should each be served with to maintain a communication link between the mobile terminal and a serving base station via at least one of the mobile stations.