Handover Suppression Optimization for Wireless Systems
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Solution Overview
Problem
In radio communication systems, handover failures occur when the timing of handover from one cell to another is not appropriately set, leading to abnormal disconnections, especially when base stations from different vendors are involved, and existing methods cannot adjust handover parameters for other cells effectively.
Innovation Solution
A radio communication system with handover suppression and optimization mechanisms that detect handover failures and adjust the degree of handover suppression based on failure rates, allowing for temporal control of handovers from other cells by holding or rejecting handover requests and optimizing parameters accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If handover parameters for other cells cannot be adjusted, then existing handover control methods are limited in effectiveness, but handover failures still occur frequently
Solution Approach 1:
The patent introduces a third party (network management system or home base station) that acts as an intermediary to adjust handover parameters for visited base stations. This mediator has the authority to modify parameters in other cells without requiring direct access to those cells' control systems, thereby enabling indirect parameter optimization across the network.
Solution Approach 2:
The patent implements a feedback mechanism where handover failure information is collected and used to dynamically adjust handover suppression parameters. The system monitors handover outcomes and uses this feedback to optimize future handover decisions, creating a closed-loop control system that adapts to actual network conditions.
2Reliability
If handover suppression is applied to control incoming handovers, then handover failures from other cells can be reduced, but handover latency increases
Solution Approach 1:
The patent applies dynamic handover suppression where the suppression level is not fixed but adjusts based on real-time conditions. The system dynamically modifies suppression parameters according to handover failure rates and network state, allowing aggressive suppression when needed and rapid handover when conditions permit, thus balancing reliability and latency requirements.
Solution Approach 2:
The patent implements preliminary handover suppression by proactively controlling incoming handovers before they can cause failures. By suppressing handovers in advance based on predicted failure risks, the system prevents problematic handovers from occurring rather than reacting to failures after they happen, reducing overall handover latency.
3Reliability
If handover suppression parameters are dynamically adjusted, then handover success rate improves, but system complexity increases
Solution Approach 1:
The patent implements self-service handover optimization where the system automatically adjusts suppression parameters based on collected handover failure information without requiring manual intervention. The network management system autonomously analyzes failure patterns and modifies parameters accordingly, reducing the need for complex manual configuration and expertise.
Solution Approach 2:
The patent segments the handover control function into separate modular components: handover suppression module, failure detection module, and parameter optimization module. This segmentation allows each component to be independently developed, tested, and optimized, reducing overall system complexity while maintaining high handover success rates.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A radio communication system and a handover control method are provided that can reduce abnormal disconnections of communication attributable to handover to from another cell an own cell. Provided are a handover suppression section (102) that, when receiving from a base station (30A) managing a first cell (35A) a request for handover to a second cell (35B), suppresses the handover in accordance with the degree of handover suppression, a handover failure detection section (13) that detects a handover failure caused by the handover suppression, and a handover suppression optimization section (203) that adjusts the degree of handover suppression based on the rate of handover failure occurrence.