Cell Reselection Using Dedicated Frequency Offset for Load Balance
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Solution Overview
Problem
In mobile communications, user equipment (UE) often fails to properly perform cell reselection to preferred cells assigned by the network, leading to load imbalance and uncontrollable network conditions, resulting in inadequate service for UEs.
Innovation Solution
A method involving an apparatus that receives a redirection frequency and a dedicated frequency offset value, determining a cell-ranking criterion for serving and neighboring cells, and performing cell reselection to the redirection frequency, ensuring UEs camp on preferred cells by using the dedicated frequency offset value to prioritize cell reselection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network assigns preferred cells to UEs for load balance, then network load distribution is improved, but UEs may not trigger cell reselection to camp on preferred cells leading to load unbalance
Solution Approach 1:
The patent applies parameter changes by introducing a dedicated frequency offset value that modifies the cell ranking criteria. This offset parameter is specifically configured to make preferred cells more attractive in the ranking calculation, thereby changing the UE's cell selection behavior to align with network load balance requirements. The frequency offset acts as a controllable parameter that adjusts cell evaluation metrics to ensure UEs reselect to preferred cells.
2Adaptability or versatility
If UEs perform cell reselection based on standard criteria, then cell selection autonomy is improved, but UEs may reselect away from preferred cells causing uncontrollable network conditions
Solution Approach 1:
The patent implements feedback by having the network provide dedicated frequency offset information to UEs based on network conditions and load distribution requirements. This feedback mechanism allows the network to guide UE cell reselection decisions, creating a closed-loop system where network state information influences UE behavior. The offset value serves as feedback that adjusts UE autonomy to maintain network controllability while preserving UE independence.
Data Source
AI summary
Various solutions for cell reselection with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a redirection frequency and a dedicated frequency offset value corresponding to the redirection frequency. The apparatus may determine a cell-ranking criterion for a serving cell according to the dedicated frequency offset value. The apparatus may further perform cell reselection to a cell on the redirection frequency from the serving cell.