On-Board Terminal Cell Reselection Parameters for Moving Base Stations
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In communication systems, on-board terminals connected to moving base stations experience frequent cell reselection issues due to the movement of the base stations, leading to inefficient network management.
Innovation Solution
A method and apparatus for mobility management in communication systems, where terminals receive system information including terrestrial and on-board cell reselection parameters, determine their on-board state based on received signal strength variations, and perform cell reselection using specific on-board parameters to optimize connection with moving base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If on-board terminals use traditional terrestrial cell reselection parameters, then general mobility management works, but frequent cell reselection occurs due to moving base station movement
Solution Approach 1:
The patent applies local quality by creating distinct cell reselection parameter sets tailored to different terminal types: terrestrial cell reselection parameters for ground-based terminals and on-board cell reselection parameters for vehicle-mounted terminals. This differentiation allows each terminal type to use parameters optimized for its specific mobility characteristics, preventing frequent unnecessary reselections for on-board terminals while maintaining appropriate mobility management for terrestrial terminals.
Solution Approach 2:
The patent implements parameter changes by modifying cell reselection parameters specifically for on-board terminals, including adjusting measurement thresholds, evaluation criteria, and reselection timing. These parameter adjustments account for the predictable movement patterns of vehicles, allowing terminals to maintain stable connections with moving base stations without triggering excessive reselection events.
2Reliability
If on-board terminals frequently reselect cells, then they may maintain connection with moving base station, but network management efficiency deteriorates
Solution Approach 1:
The patent reduces network management overhead by implementing location-specific parameter optimization. On-board terminals use specialized cell reselection parameters that account for vehicle movement patterns, allowing the network to predict and prepare for handovers more efficiently. This localized optimization reduces the frequency of unexpected reselection events and the associated signaling overhead.
3Device complexity
If terminals apply unified cell reselection parameters, then system complexity is low, but mobility management accuracy for different terminal types deteriorates
Solution Approach 1:
The patent resolves the contradiction between complexity and accuracy by implementing differentiated parameter sets for different terminal types. The network configures and broadcasts separate cell reselection parameters for terrestrial and on-board terminals, allowing each group to receive mobility management instructions optimized for their specific characteristics. This targeted approach improves accuracy without requiring overly complex terminal-side decision-making.
Data Source
AI summary
A method of a terminal may comprise: receiving system information including terrestrial cell reselection parameters and on-board cell reselection parameters; determining whether the terminal is in an on-board state with respect to a first base station; and in response to determining that the terminal is in the on-board state with respect to the first base station, performing cell reselection by applying the on-board cell reselection parameters to reception measurement on the first base station.