Cell Reselection Using CDRX Parameters for UE Power Saving
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Solution Overview
Problem
Existing network selection strategies fail to account for Connected Discontinuous Reception (CDRX) configuration, leading to increased power consumption when User Equipment (UE) remains in cells without CDRX or with short period configurations, preventing entry into power-saving states.
Innovation Solution
A method and device for intelligently selecting a network with optimal CDRX configuration by detecting CDRX parameters, signal quality, and performing cell reselection to camp on cells with longer period CDRX, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If UE remains in a cell without CDRX or with short period CDRX configuration, then the UE can maintain continuous connectivity and signal quality, but the UE cannot enter into CDRX power-saving states leading to higher power consumption
Solution Approach 1:
The patent applies preliminary action by having the UE proactively detect and evaluate CDRX configuration parameters of neighboring cells before actually performing cell reselection. The UE measures signal qualities of neighboring cells and compares their CDRX configurations in advance, so when reselection becomes necessary, the UE already has the information needed to choose an optimal cell with favorable CDRX settings, thereby reducing power consumption while maintaining connectivity stability.
Solution Approach 2:
The patent implements feedback mechanisms where the UE continuously monitors and reports CDRX configuration information about current and neighboring cells. This feedback loop enables the UE to learn which cells provide better CDRX configurations and use this information to make informed reselection decisions, balancing power savings with connectivity reliability through iterative learning and adaptation.
2Use of energy by moving object
If UE actively selects cells with longer period CDRX configuration, then power consumption is reduced, but the complexity of cell evaluation and selection increases
Solution Approach 1:
The patent applies local quality by focusing the UE's evaluation efforts not on all cells universally, but specifically on neighboring cells that have demonstrated favorable CDRX configurations in local measurements. The UE prioritizes measuring and evaluating CDRX parameters of adjacent cells rather than performing comprehensive analysis of all possible cells, thereby reducing the complexity burden while still achieving significant power savings through targeted selection of optimal local cells.
Solution Approach 2:
The patent implements partial action by having the UE perform CDRX configuration detection and signal quality measurement only for neighboring cells within a defined range, rather than exhaustively analyzing all possible cells in the entire network. This partial evaluation approach reduces the computational and measurement complexity while still providing sufficient information for making optimal cell reselection decisions that minimize power consumption.
Data Source
AI summary
A cell reselection method including detecting whether a first network cell is configured with a first Connected Discontinuous Reception (CDRX) parameter, acquiring a first signal quality and at least one second signal quality in response to detecting that the first network cell is not configured with the first CDRX parameter or that the first CDRX parameter configured for the first network cell is not greater than a CDRX parameter threshold, the first signal quality corresponding to the first network cell, the at least one second signal quality respectively corresponding to at least one second network cell adjacent to the first network cell, determining whether to perform network cell reselection based on the first signal quality and the at least one second signal quality, and determining a reselected network cell from among the at least one second network cell in response to determining to perform the network cell reselection.