Cell Transfer Controller Waiting Period Logic
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Solution Overview
Problem
Mobile terminals experience frequent cell reselections, leading to battery exhaustion due to inefficient selection of target radio cells, as they move out of coverage areas, resulting in unnecessary battery consumption and system information reading.
Innovation Solution
A cell transfer controller that detects available radio cells and determines a waiting period for a first radio cell, increasing this period if a second cell with better reception quality or higher priority is detected during the initial waiting period, thereby postponing the transfer to the first cell until the second cell's waiting period expires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile terminal performs frequent cell reselections to track the best radio cell, then the reception quality is improved, but the battery power is exhausted
Solution Approach 1:
The patent applies preliminary action by introducing a waiting period before allowing cell reselection. The mobile terminal detects available radio cells and waits for a predetermined period before executing reselection, preventing immediate and frequent cell changes. This preliminary waiting action reduces battery consumption while still enabling the terminal to switch cells when necessary, thus resolving the contradiction between maintaining reception quality and conserving battery power.
2Speed
If the mobile terminal immediately selects a detected radio cell as target for reselection, then the cell transfer speed is improved, but unnecessary reselections occur causing battery exhaustion
Solution Approach 1:
The patent implements periodic action by establishing a waiting period that acts as a temporal filter for cell reselection decisions. Instead of immediate reselection upon detection, the system waits for a predetermined duration before executing the transfer. This periodic timing mechanism prevents premature or unnecessary reselections while maintaining acceptable transfer speed, thereby reducing battery consumption without significantly impacting communication efficiency.
3Measurement precision
If the mobile terminal reads system information for all detected radio cells, then the cell selection accuracy is improved, but the processing time and energy consumption increase
Solution Approach 1:
The patent applies preliminary action by performing cell detection and waiting period establishment before executing the full cell reselection process with system information reading. The waiting period acts as a preliminary filter that prevents immediate reselection decisions, allowing the terminal to read system information more selectively and efficiently. This preliminary waiting action reduces unnecessary processing time and energy consumption while maintaining accurate cell selection.
Data Source
AI summary
A cell transfer controller is described comprising a detector configured to detect radio cells available for a mobile terminal; a determiner configured to determine, for a first radio cell detected by the detector, a waiting period after which the radio cell is selectable by the cell transfer controller as a target cell for a cell transfer and a controller, configured to increase the length of the waiting period in case that during the waiting period, the detector detects a second radio cell which fulfills a predetermined criterion.