Wireless Terminal De-prioritization Cancellation Handling
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Solution Overview
Problem
In wireless communication systems, particularly in 3GPP LTE, terminal mobility leads to degraded service quality due to network-deployed de-prioritization of frequencies and Radio Access Technologies (RATs, resulting in inefficient cell reselection and limited network optimization efficiency.
Innovation Solution
A method and apparatus that allow terminals to apply and cancel de-prioritization based on network commands, adjusting frequency and RAT priorities dynamically to improve service quality and radio resource efficiency by handling de-prioritization cancellation commands and maintaining adaptive priority handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the network provides de-prioritization information to limit terminal mobility, then network optimization efficiency is improved, but service quality provided to the terminal deteriorates
Solution Approach 1:
The patent implements dynamic priority handling by introducing a de-prioritization timer that automatically expires after a predetermined period. This allows the terminal to transition from a static de-prioritized state to a dynamic state where priorities can be reassessed and updated, enabling the terminal to access cells that may have improved service quality over time while maintaining network optimization goals.
Solution Approach 2:
The patent employs periodic action through the de-prioritization timer mechanism that resets or expires at predetermined intervals. This periodic refresh allows the terminal to periodically re-evaluate cell priorities and potentially access cells that were previously de-prioritized, thereby improving service quality while the network maintains overall optimization efficiency through controlled periodic updates.
2Reliability
If the terminal operates based on existing network information, then access to cells providing excellent service is cut-off, but network side access limitation efficiency is maintained
Solution Approach 1:
The patent applies preliminary action by having the terminal proactively handle de-prioritization cancellation before the de-prioritization timer expires. The terminal can determine based on measured cell priorities whether to cancel de-prioritization early, allowing access to cells that have become suitable for service while maintaining network optimization by only canceling when necessary.
Solution Approach 2:
The patent implements feedback mechanisms where the terminal measures cell priorities and compares them against de-prioritization settings. This feedback loop allows the terminal to make informed decisions about whether to cancel de-prioritization, ensuring that service quality is improved only when actual cell conditions warrant such changes, thereby maintaining network optimization efficiency.
3Productivity
If de-prioritization is applied to frequencies in the de-prioritization frequency list, then terminal movement limitation is achieved, but adaptive priority handling is reduced
Solution Approach 1:
The patent makes the de-prioritization mechanism dynamic by introducing timer-based expiration and cancellation capabilities. Instead of static frequency prioritization, the system now allows priorities to change over time and in response to network conditions, enhancing adaptability while maintaining mobility control through the structured timer and cancellation command mechanisms.
Solution Approach 2:
The patent enables parameter changes by allowing de-prioritization settings to be modified through cancellation commands and timer expiration. The priority parameters for frequencies can be dynamically adjusted based on network conditions and terminal measurements, transforming the rigid de-prioritization approach into a flexible adaptive system that maintains control while improving responsiveness.
Data Source
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AI summary
An operation method performed by a terminal in a wireless communication system is provided. The method includes: applying de-prioritization to one or more frequencies in a de-prioritization frequency list; receiving a de-prioritization cancellation command from a network; and handling the applied de-prioritization on the basis of the de-prioritization cancellation command.