Cell Selection Control via Connection Barring for Load Balancing
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Solution Overview
Problem
Conventional wireless communication systems face challenges in resolving load imbalances between cells, as existing techniques require configuring selection probability or priority for each cell, which can be complex and ineffective in managing load distribution.
Innovation Solution
A wireless communications apparatus and method that uses a control unit to establish connections and perform cell selection or reselection based on control information related to the degree of connection barring across cells, allowing terminals to switch from a barred cell to another cell, thereby reducing load on the barred cell and balancing loads between cells without configuring selection probabilities or priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If selection probability or priority is configured for each cell to distribute load, then load distribution is improved, but device complexity and configuration complexity increase
Solution Approach 1:
The patent extracts the cell selection control mechanism from complex probability/priority configurations and simplifies it to connection barring indicators. The base station only needs to indicate whether connection is barred for each cell, removing the need for complex selection probability configurations while achieving load distribution through terminal-side random selection among non-bared cells.
Solution Approach 2:
Instead of actively guiding terminals to select specific cells using probability/priority values, the patent inverts the approach by having base stations bar connections to overloaded cells. Terminals then passively select cells from the non-bared set, reversing the control direction from active guidance to passive restriction, thereby simplifying configuration while maintaining load distribution effectiveness.
2Productivity
If connection barring is implemented to reduce load on overloaded cells, then load balance is improved, but system reliability may worsen due to restricted access
Solution Approach 1:
The patent implements dynamic connection barring where base stations can flexibly bar or unbar cells based on real-time load conditions. Terminals dynamically select from available non-bared cells, allowing the system to adapt to changing load patterns while maintaining access reliability through multiple available cells rather than rigid static configurations.
Solution Approach 2:
The patent enables terminals to autonomously select cells from the set of non-bared cells without requiring complex network guidance. This self-service mechanism allows terminals to independently adapt to load conditions by choosing from available cells, maintaining access reliability while supporting load balancing through distributed decision-making.
Data Source
AI summary
A wireless communications apparatus includes a control unit configured to establish a connection with a first cell formed by another wireless communications apparatus, the control unit performing selection or reselection of a second cell different from the first cell, according to a value of control information corresponding to a degree of connection barring of at least one or more cells, when the connection with the first cell is barred. The wireless communications apparatus camps on the second cell, not on the first cell when the control unit performs the selection or reselection of the second cell.