Cell Reselection Using Mobility Information for Vehicle Relays
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Solution Overview
Problem
The mobility of base stations in wireless communication systems poses challenges in maintaining efficient cellular coverage and capacity, particularly in urban environments where real estate availability and regulatory constraints limit traditional infrastructure deployment, and vehicle-mounted relays offer a promising but unoptimized solution.
Innovation Solution
The implementation of a wireless terminal and access node system that utilizes cell reselection configurations and mobility information to determine whether to reselect neighboring cells, with serving and neighboring cell mobility information being transmitted to wireless terminals to facilitate optimal cell reselection based on the mobility state of cells, including vehicle-mounted relays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If vehicle-mounted relays are deployed to provide cellular coverage in urban environments, then coverage and capacity are improved, but system complexity and mobility management difficulty increase
Solution Approach 1:
The patent introduces cell mobility information as an intermediary parameter that mediates between the moving vehicle-mounted relay and the wireless terminal. This information acts as a communication bridge, allowing the terminal to understand and adapt to the relay's mobility state without requiring complex direct coordination mechanisms.
Solution Approach 2:
The system implements feedback through cell mobility information that is transmitted to wireless terminals. This feedback mechanism allows terminals to adjust their cell reselection behavior based on the mobility state, creating a closed-loop system that automatically adapts to changing conditions without manual intervention.
2Reliability
If traditional cell reselection procedures are used with mobile base stations, then connectivity is maintained, but connection stability and service continuity deteriorate due to frequent handovers
Solution Approach 1:
The patent applies preliminary action by providing cell mobility information to wireless terminals in advance, before the terminal needs to make cell reselection decisions. This allows terminals to proactively adjust their reselection parameters based on predicted mobility patterns, preventing unnecessary handovers before they occur.
Solution Approach 2:
The system dynamically adapts cell reselection behavior based on the mobility state of the base station. When mobility is detected, the system dynamically adjusts reselection parameters to maintain stable connections, transforming a static reselection procedure into a dynamic, adaptive process.
3Reliability
If cell reselection parameters are optimized for stationary cells, then connection stability is improved, but adaptability to mobile base stations deteriorates
Solution Approach 1:
The patent changes the parameter set by introducing cell mobility information as a new parameter that influences cell reselection decisions. This additional parameter allows the system to adjust reselection behavior based on whether the base station is stationary or mobile, enabling adaptation to different mobility scenarios while maintaining stability for stationary cases.
Data Source
AI summary
In one of its example aspects, the technology disclosed herein concerns a wireless terminal of a cellular telecommunication system which comprises receiver circuitry and processor circuitry. The processor circuitry is configured to camp on a serving cell. The receiver circuitry configured to receive a cell reselection configuration from the serving cell, and cell mobility information. The processor circuitry is further configured to perform a cell reselection procedure to determine, based on the cell reselection configuration and the cell mobility information, whether or not to reselect a neighboring cell. The cell mobility information indicates mobility state of a corresponding cell.