Cellular Handover Trigger Thresholds for Load Balancing
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Solution Overview
Problem
Current wireless telecommunications networks face challenges in efficiently managing handovers of mobile devices due to high traffic loads, as they often require adjusting handover parameters and do not effectively balance load between cells, leading to suboptimal handover success rates.
Innovation Solution
A method where a base station determines traffic load and configures mobile devices to transmit second and first handover trigger signals based on signal strength differences and resource consumption thresholds, allowing for dynamic load balancing without complete parameter adjustments, prioritizing handovers of resource-intensive devices during high traffic loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If handover parameters are adjusted frequently to manage high traffic loads, then load balancing improves, but handover success rate deteriorates due to suboptimal parameters
Solution Approach 1:
The system performs preliminary assessment of traffic load conditions before initiating handover parameter adjustments. By evaluating traffic load thresholds in advance, the network can determine whether adjustment is necessary, avoiding unnecessary parameter changes that would degrade handover success rate while still enabling load balancing when truly needed.
Solution Approach 2:
The invention dynamically changes handover parameters (such as hysteresis values and trigger thresholds) based on assessed traffic load conditions. When traffic load exceeds thresholds, parameters are adjusted to facilitate load balancing; when loads are normal, parameters remain optimal for handover success, thus resolving the contradiction between load balancing and handover reliability.
2Productivity
If handover trigger thresholds are lowered to balance load during high traffic, then more devices can be handed over, but handover stability deteriorates causing frequent back-and-forth handovers
Solution Approach 1:
The system applies different handover trigger thresholds locally based on traffic load conditions. During high traffic loads, lower thresholds are applied specifically to enable load balancing handovers. During normal conditions, higher thresholds maintain stability. This local adaptation resolves the contradiction by allowing aggressive load balancing only when necessary while maintaining stability otherwise.
Solution Approach 2:
The handover trigger thresholds are made dynamic rather than static, adapting to current traffic load conditions. The system can lower thresholds during high load periods to increase handover capacity for load balancing, then restore higher thresholds when loads normalize, preventing frequent back-and-forth handovers while enabling load balancing when needed.
3Productivity
If traffic load monitoring and selective handover triggering are implemented, then network efficiency improves, but system complexity increases
Solution Approach 1:
The system implements self-service through automated traffic load monitoring and selective handover triggering. Base stations automatically assess traffic loads, determine whether adjustment is needed, and execute parameter changes without manual intervention. This automation improves network efficiency while managing complexity by embedding intelligence within the network elements themselves rather than requiring external complex control systems.
Data Source
AI summary
The invention relates to a method for performing a handover of a mobile device from a source cell to a target cell in a cellular wireless telecommunication network, the method comprising the following steps: configuring the mobile device to transmit a first handover trigger signal to the source cell, when a difference between a signal strength of the target cell and a signal strength of the source cell as measured by the mobile device is above a first threshold (105; determining (S1) if a cell traffic load in the source cell is above a cell traffic load threshold; if so, configuring the mobile device to transmit a second handover trigger signal to the source cell, when a difference between a signal strength of the target cell and a signal strength of the source cell as measured by the mobile device is above a second threshold (100), wherein the first threshold is larger than the second threshold.