Wireless Device Cell Reselection Threshold Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current cell reselection procedures in wireless communications systems consume excessive energy and lead to increased interference due to frequent monitoring of signal strengths, causing mobile stations to remain connected to suboptimal cells, even when better options are available, resulting in degraded Signal-to-Interference-plus-Noise Ratio (SINR) and reduced battery life.
Innovation Solution
A method where a wireless device determines the difference between signal parameters received from its serving cell and neighboring cells, triggering a cell reselection procedure only when the difference exceeds a predetermined threshold, allowing for more efficient energy use and improved connectivity by switching to better cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless device frequently monitors signal strengths from multiple cells, then the device can identify and switch to the most suitable cell, but the energy consumption increases and battery life is reduced
Solution Approach 1:
The patent applies periodic action by monitoring signal strengths at specific intervals rather than continuously. The device monitors signal parameters from the serving cell and neighboring cells at predetermined time points, triggering cell reselection only when the difference in signal strength exceeds a threshold. This periodic monitoring reduces energy consumption while maintaining reliable cell connection quality.
2Reliability
If the wireless device frequently triggers cell reselection procedure, then the device can maintain optimal connection, but the interference in the network increases
Solution Approach 1:
The patent implements feedback by comparing the current signal strength with previously recorded signal strength values. The device calculates the difference between signal parameters from the serving cell and neighboring cells, and only triggers cell reselection when this difference exceeds a predetermined threshold. This feedback mechanism prevents unnecessary reselections and reduces network interference while maintaining optimal connections.
3Use of energy by moving object
If the wireless device remains connected to a cell with sufficient signal strength, then the device saves energy by avoiding reselection, but the device may remain connected to a suboptimal cell
Solution Approach 1:
The patent applies dynamics by making the cell reselection threshold adaptive rather than fixed. The device dynamically adjusts its behavior based on the current signal strength conditions: when the serving cell signal is strong and stable, the device maintains connection to save energy; when the signal difference between cells exceeds the threshold, the device triggers reselection to improve connection quality. This dynamic approach balances energy saving with connection optimization.
Data Source
AI summary
A wireless device 230 and a method therein for triggering a cell reselection procedure. The wireless device is served by a first Radio Network Node (RNN) 210, and the wireless device and the first RNN are operating in a wireless communications system 200. The wireless device determines a difference between a second signal parameter of a second signal and a first signal parameter of a first signal, wherein the first and second signal parameters are received from the first RNN. Further, the wireless device triggers a cell reselection procedure when the determined difference is larger than a first predetermined threshold value for the cell reselection procedure.