Wireless Base Station Handover Optimization
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Solution Overview
Problem
In mobile communication systems, the time required for handover is prolonged due to the need for wireless network terminals to measure and compare radio wave strengths from multiple base stations, leading to increased processing time and potential communication disruptions, as well as inefficient load distribution among base stations.
Innovation Solution
A mobile communication system where wireless base stations measure radio wave strengths from both connected and other terminals, creating a terminal management table that combines data from multiple stations to determine priority access points and distribute load, reducing the need for extensive probe response signal processing and minimizing communication disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the wireless network terminal measures and compares radio wave strengths from multiple base stations to select the best access point, then the handover selection accuracy is improved, but the handover time is prolonged
Solution Approach 1:
The base station performs preliminary measurements of radio wave strengths from wireless terminals and pre-calculates the optimal handover target. By preparing the terminal management table in advance that includes radio wave strength information measured by multiple base stations, the system eliminates the need for the terminal to perform time-consuming measurements and comparisons during handover, thus reducing handover time while maintaining selection accuracy.
Solution Approach 2:
The base station acts as an intermediary that collects and processes radio wave strength information on behalf of the terminal. Instead of the terminal directly measuring and comparing signals from multiple base stations, the base station measurements serve as an intermediary source of accurate information, enabling the terminal to make handover decisions based on pre-collected data without extending handover time.
2Adaptability or versatility
If multiple wireless base stations transmit probe response signals to the wireless network terminal, then the terminal has more options for selection, but the processing load on the terminal increases
Solution Approach 1:
The invention extracts the radio wave strength measurement function from the terminal and relocates it to the base station. By having base stations perform the measurements and include the results in probe response signals, the terminal only needs to process the pre-measured strength values rather than performing its own measurements, thus reducing terminal processing load while maintaining the ability to evaluate multiple base stations.
Solution Approach 2:
The base station serves itself by measuring the radio wave strengths of terminals in its coverage area and using this information to determine optimal handover targets. This self-service approach eliminates the need for terminals to perform complex measurements and comparisons, reducing terminal processing requirements while ensuring accurate handover decisions.
3Reliability
If the wireless network terminal always selects the base station with the largest signal strength, then the connection quality is maximized, but the load distribution among base stations becomes unbalanced
Solution Approach 1:
The base station uses feedback from radio wave strength measurements to make intelligent handover decisions. By considering the terminal's location, movement direction, and the current load status of neighboring base stations (inferred from measurement patterns), the system can direct handovers to base stations that will maintain connection quality while balancing the load across the network, preventing any single base station from becoming overloaded.
Solution Approach 2:
The invention applies different selection criteria to different base stations based on local conditions. Instead of uniformly selecting the base station with the absolute strongest signal, the system considers local network conditions and load distribution, allowing terminals to be distributed across multiple base stations with slightly different signal strengths, thereby balancing load while maintaining adequate connection quality in each local area.
Data Source
AI summary
A mobile communication system with which the time required for handover is short and which has a superior network operating efficiency. In the mobile communication system of the present invention, each wireless base station measures the strength of the radio waves received from a wireless terminal irrespective of whether or not the destination of the radio waves is the wireless base station itself. The respective wireless base stations mutually provide the radio wave strength measurement result. The wireless base stations replies to the request for handover from wireless terminal only when the radio wave of itself is strongest. In addition, when the processing load is large, the wireless base station selects another wireless base station for which the radio wave strength from the wireless terminal is large and switches the connection.