User Equipment Cell Selection Priority Management
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Solution Overview
Problem
In LTE systems, when a user equipment terminal moves to an adjacent cell in a different tracking area, it performs a tracking area update, but there is no efficient mechanism to manage priority information for cell selection, leading to potential communication quality degradation and increased information overhead.
Innovation Solution
A user equipment terminal and radio communication system that sets priorities for selecting standby cells based on specified priority information, allowing the network to manage load balancing and communication quality by discarding or updating priority information during tracking area updates, ensuring optimal cell selection based on available resources and service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network transmits priority information for cell selection to all user equipment terminals, then communication quality is improved by directing terminals to optimal frequency layers, but information overhead increases
Solution Approach 1:
The patent segments priority information transmission by tracking area. The network divides the service area into multiple tracking areas, each with its own priority information settings. This allows priority information to be transmitted only to terminals in specific tracking areas rather than all terminals, reducing overall information overhead while maintaining communication quality where needed.
Solution Approach 2:
The patent implements local quality by allowing different priority information to be assigned to different tracking areas. Each tracking area can have customized priority settings based on local network conditions, load balancing requirements, and service quality objectives. This enables targeted quality improvement in specific areas without unnecessarily increasing information overhead network-wide.
2Productivity
If the network manages load balancing through cell selection priorities, then network efficiency is improved, but device complexity increases for managing and updating priority information
Solution Approach 1:
The patent implements self-service by enabling user equipment terminals to automatically manage their own cell selection based on received priority information. Terminals autonomously determine which frequency layers to prioritize for cell selection and reselection without requiring complex network-side coordination for each individual terminal. This reduces device complexity while maintaining network efficiency.
Solution Approach 2:
The patent employs periodic action through cell reselection mechanisms where terminals periodically evaluate available cells based on priority information and propagation conditions. This periodic evaluation allows the network to achieve load balancing through simple, repeated terminal actions rather than complex continuous management, reducing device complexity while improving network efficiency.
Data Source
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AI summary
A user equipment terminal for selecting a standby cell based on a specified priority of cell selection includes a determining unit configured to receive a signal transmitted from a base station apparatus and determine whether priority information of cell selection is included in the signal; and a cell selecting unit configured to perform, based on the determination result by the determining unit, cell selection with a same priority for each cell, when the priority information is not included.