Neighboring Cell Reselection Using Blacklists for Load Balancing
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Solution Overview
Problem
Cell reselection based on existing criteria often leads to terminal devices selecting high-channel-quality cells, causing overload and degrading system performance.
Innovation Solution
A wireless communication method that considers a cell blacklist and measurement activation thresholds to facilitate reselection or handover to low-load cells, using cell measurement and reporting techniques to achieve load balancing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell reselection is based on channel quality criteria, then terminal devices can select cells with high channel quality, but this causes cell overload and degrades system performance
Solution Approach 1:
The patent introduces a cell blacklist parameter that modifies the traditional cell reselection criteria. Instead of solely relying on channel quality measurements, the system now considers whether a cell is blacklisted (indicating overload conditions). This parameter change allows terminals to avoid overloaded cells even if they have good channel quality, thereby preventing cell overload while maintaining connection quality.
Solution Approach 2:
The cell blacklist acts as an intermediary mechanism between channel quality assessment and cell reselection decisions. The network can mark certain cells as blacklisted when they become overloaded, and terminals use this blacklist information as an intermediate filter before making reselection decisions. This intermediary prevents direct selection of overloaded cells while still allowing selection based on channel quality when appropriate.
2Reliability
If terminals always select the cell with highest channel quality, then connection reliability is improved, but load balancing among cells deteriorates
Solution Approach 1:
The patent adds the cell blacklist status as an additional parameter to the cell reselection decision-making process. Terminals now evaluate multiple parameters including channel quality and blacklist status. When a cell is blacklisted, it is excluded from selection regardless of channel quality, enabling load balancing while terminals still achieve reliable connections through the modified selection criteria.
Solution Approach 2:
Instead of selecting cells based purely on highest channel quality, the patent inverts the approach by first filtering out blacklisted cells and then selecting from the remaining candidates. This inversion of the selection logic prioritizes load balancing considerations before optimizing for channel quality, achieving both reliability and load distribution.
Data Source
AI summary
The embodiments of the present disclosure provide a wireless communication method and a terminal device. The method includes: determining, by a terminal device, whether to activate neighboring cell measurement based on a measurement activation threshold and/or a cell blacklist; and determining, when the neighboring cell measurement is activated, a target cell for reselection based on a measurement result of at least one neighboring cell and the cell blacklist.