Cell Handover Control Using Load and Quality Criteria
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Solution Overview
Problem
In mobility load balancing for wireless communication systems, the use of load state as a balancing criterion can degrade communication quality in terminal devices.
Innovation Solution
A communication control device that receives quality and load information from adjacent cells and selects a handover destination based on maintaining minimum required communication quality, thereby balancing load while minimizing quality degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If load state is used as a balancing determination criterion in mobility load balancing, then load distribution among base station devices is improved, but communication quality in terminal devices deteriorates
Solution Approach 1:
The invention changes the balancing determination criterion from load state alone to a composite criterion that includes both load state and communication quality parameters. The quality determination unit evaluates communication quality based on signal strength, interference levels, and other quality metrics, then combines this with load information to make handover decisions that satisfy both load balancing and quality maintenance requirements.
Solution Approach 2:
The invention introduces a quality determination unit as an intermediary between the load information acquisition unit and the handover control unit. This intermediary evaluates communication quality independently and acts as a filter or gatekeeper that prevents handovers which would degrade quality, even when load balancing would benefit from such handovers.
2Productivity
If handover is performed based on load information only, then load balancing efficiency is improved, but terminal device communication quality deteriorates
Solution Approach 1:
The invention changes the handover decision parameters from considering only load information to considering both load information and quality information. The system evaluates multiple parameters including current load state, target cell load state, signal strength, and quality metrics before determining handover eligibility, ensuring both efficiency and quality are maintained.
Solution Approach 2:
The invention performs preliminary quality evaluation before executing handover decisions. The quality determination unit assesses communication quality in advance for potential target cells, and only cells that meet quality thresholds are considered as valid handover targets, preventing quality degradation before it occurs.
Data Source
AI summary
A communication control device includes: a memory; and a processor coupled to the memory and the processor configured to: receive quality information indicating communication quality and load information indicating a communication load for each of a plurality of cells adjacent to a specific cell from a base station device; specify any one of the plurality of cells as a first cell on which a terminal device located in the specific cell performs handover at a predetermined timing on a basis of the load information and the quality information for each of the plurality of cells at the predetermined timing; and transmit information indicating the specified first cell to the base station device.