Wireless Load Balancing via Neighbor Cell Estimation
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Solution Overview
Problem
Conventional wireless communication systems fail to effectively reduce the number of overload terminals per cell, leading to inefficiencies in load balancing and power control, especially in scenarios where load increases in specific cells.
Innovation Solution
A method and apparatus for power control and load balancing in wireless communication systems that utilize load estimation from neighboring cells to determine power control and handover decisions, minimizing the sum of squares of overload terminals by adjusting power variations and backoff counter values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional load balancing is performed to decrease the load of a specific cell, then the load of that cell is reduced, but the number of overload terminals in the overall system cannot be reduced
Solution Approach 1:
The patent merges the load balancing objectives across multiple cells by considering neighbor cell load information. Instead of treating each cell independently, the base station integrates load data from neighboring cells to make unified power control and handover decisions that minimize the total number of overload terminals across the entire system.
Solution Approach 2:
The patent implements feedback mechanisms where base stations exchange load estimation information with neighboring base stations. This feedback loop enables each base station to adjust its power control and handover parameters based on real-time load conditions of neighbor cells, creating a coordinated system-wide response to overload conditions.
2Productivity
If power control and handover decisions are made without considering neighbor cell load, then local cell load is managed, but network efficiency and capacity are not optimized
Solution Approach 1:
The patent performs preliminary load estimation of neighbor cells before making power control and handover decisions. By proactively gathering and processing load information from neighboring base stations in advance, the system can prepare optimized handover parameters and power control settings, improving network efficiency without causing delays in real-time decision-making.
3Quantity of substance
If load balancing is performed based on local cell load only, then simple local control is achieved, but the sum of squares of overload terminals per cell is not minimized
Solution Approach 1:
The patent introduces neighbor cell load information as an intermediary factor in the decision-making process. This additional information dimension enables the system to minimize the sum of squares of overload terminals across the entire network by considering the impact of local power control decisions on neighboring cells, rather than optimizing for local conditions alone.
Data Source
AI summary
A Base Station (BS) operation method for reducing load terminals based on load estimation of a neighbor cell in a wireless communication system includes receiving information for estimating a load of a neighbor BS, determining whether to determine the power control and handover terminal set using the number of terminals serviced by the neighbor BS, the number of overload terminals among the terminals serviced by the neighbor BS, and the backoff counter value, and, when it is determined to determine a power control and handover terminal set, deciding the power control and handover terminal set to minimize load terminals, based on the first power variation and the second power variation.