Dynamic Neighbor Cell Relation Configuration for High-Speed Railway Handovers
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Solution Overview
Problem
Existing solutions for high-speed railway wireless communication networks face challenges in handover procedures due to high signal penetration loss and inefficient capacity utilization, leading to dropped calls and increased costs, especially when integrating high-speed trains with normal cellular networks.
Innovation Solution
A method and radio network node that monitor the rate of wireless device accesses to configure neighboring cell relations dynamically, adapting cell configurations to support high-speed scenarios without relying on speed estimations or separate network deployments, by using a detection algorithm to identify increased access rates indicating the presence of high-speed trains and adjusting neighbor cell lists and network parameters accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate HST network is created to support high-speed trains, then handover performance for high-speed devices is improved, but network complexity and cost increase
Solution Approach 1:
The patent merges the HST network and normal cellular network into a single integrated network infrastructure. Instead of maintaining separate networks, the invention uses a unified network where cells are dynamically configured to serve both HST and normal devices, eliminating the need for separate network deployment while maintaining reliable handover performance for high-speed trains.
Solution Approach 2:
The patent implements dynamic cell configuration where neighbor cell relations are adjusted in real-time based on detected HST presence. When HSTs are detected through increased access rates, the network dynamically modifies cell parameters and neighbor lists to optimize handover for high-speed devices, rather than using static separate network configurations.
2Illumination intensity
If signal strength is increased in HST network cells to penetrate railroad cars, then coverage for HST devices is improved, but capacity for non-HST devices decreases
Solution Approach 1:
The patent applies local quality by configuring different neighbor cell relations and parameters for different locations and time periods. Cells along railway routes are configured with HST-optimized parameters (including higher signal strength and specific neighbor lists) during periods when HSTs are detected, while maintaining normal configuration for other times, thus providing strong penetration only where and when needed.
Solution Approach 2:
The patent implements periodic monitoring of access rates to detect HST presence and dynamically adjusts cell configuration accordingly. The network alternates between HST-optimized mode (with higher signal strength) and normal mode based on periodic detection cycles, ensuring capacity is allocated appropriately based on actual HST presence rather than continuously.
3Measurement precision
If neighbor cell relations are configured for HST scenarios, then handover accuracy for high-speed devices is improved, but signaling resources and complexity increase
Solution Approach 1:
The patent prepares HST-optimized neighbor cell relations and cell configurations in advance, storing them as predefined sets. When HST presence is detected through access rate monitoring, the network quickly switches to the pre-configured HST parameter sets, avoiding the need to calculate and configure optimal parameters in real-time, thus reducing signaling overhead while maintaining high handover accuracy.
4Measurement precision
If a detection algorithm is used to identify HST presence, then dynamic configuration accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent implements a self-service detection mechanism where the network monitors its own access rate patterns to automatically detect HST presence. The detection algorithm analyzes existing access rate data without requiring external input or complex processing, allowing the network to self-identify HST scenarios and trigger appropriate configuration changes based on simple threshold comparisons of access rate variations.
Data Source
AI summary
A method and a related radio network node for configuring neighboring cell relations of a cell. The method is performed in a radio network node of a wireless communication system serving wireless devices in the cell. The method comprises monitoring a rate of wireless device accesses in the cell, and configuring neighboring cell relations of the cell based on the monitored rate of wireless device accesses in the cell.