Radio Communication Apparatus Base Station Search Optimization
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Solution Overview
Problem
Radio communication apparatuses, especially those mounted on mobile bodies like vehicles, face inefficiencies and increased power consumption due to frequent failures of initial base station searches in dynamic environments, leading to wasteful power usage and prolonged search times.
Innovation Solution
The apparatus performs a first base station search using stored auxiliary information and switches to a second base station search on all frequencies if the first search fails or if no information is stored, and determines whether to store or delete base station information based on the movement state of the apparatus during location registration, optimizing search efficiency and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the apparatus performs a first base station search using stored auxiliary information, then search time is reduced in static environments, but search reliability deteriorates in dynamic environments where the apparatus moves frequently
Solution Approach 1:
The system dynamically adjusts the base station search strategy based on the movement state of the apparatus. When movement is detected (exceeding threshold values), the system switches from using stored auxiliary information to performing a comprehensive search across all frequencies, ensuring reliability in dynamic environments while maintaining efficiency in static conditions
Solution Approach 2:
The system changes the search parameters (frequency range, search scope) based on the movement state. In static conditions, it uses limited frequency ranges from auxiliary information; in dynamic conditions, it expands to search all supported frequencies, optimizing the balance between search time and reliability
2Reliability
If the apparatus performs a second base station search on all frequencies when the first search fails, then search reliability is improved, but power consumption increases
Solution Approach 1:
The system performs the power-intensive second base station search on all frequencies only when movement is detected, making the high-power operation conditional rather than routine. This dynamic approach ensures reliability when needed while minimizing unnecessary power consumption in static environments
Solution Approach 2:
The system changes the search scope parameter based on movement state. When moving, it expands the frequency search range to all supported frequencies; when stationary, it limits the search to stored auxiliary information frequencies, thereby controlling power consumption
3Productivity
If the apparatus continuously stores base station information as search auxiliary information, then search efficiency is improved in static areas, but adaptability deteriorates when the apparatus moves to new locations
Solution Approach 1:
The system dynamically manages the auxiliary information based on movement detection. When movement is detected, it deletes stored auxiliary information to prevent using outdated data in new locations, thereby maintaining adaptability. When stationary, it retains and uses the auxiliary information for efficient searches
Solution Approach 2:
The system changes the state of the auxiliary information (stored or deleted) based on the movement parameter. This conditional management ensures that the system has efficient search data available when stationary while remaining adaptable to new locations when moving
Data Source
AI summary
A radio communication apparatus includes a communicator, and a controller configured to perform, in a case where search auxiliary information used to search for a base station used as a connection destination is stored, a first base station search based on the search auxiliary information. The controller is configured to perform a second base station search on all frequencies supported by the communicator in a case of failure in the first base station search or in a case where the search auxiliary information is not stored. The controller is configured to determine whether to store base station information related to the base station used as a connection destination, as the search auxiliary information, based on a movement state of the radio communication apparatus when location registration is performed via the base station used as the connection destination.