Mobile Station Handover Quality Table Switching
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Solution Overview
Problem
Existing mobile communication systems frequently fail to successfully switch radio base stations during handover due to factors like excessive traffic load and quality fluctuations, leading to disconnections in real-time voice and image communication.
Innovation Solution
A mobile station that maintains a quality table of communication levels with multiple radio base stations, allowing it to select and switch to a new base station based on available bandwidth and quality criteria, sending a connection request to the selected base station after verifying its identification information and receiving approval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile station sends the quality table to the currently-communicating radio base station when quality drops below threshold, then handover can be initiated, but communication may be disconnected during the process due to quality fluctuations
Solution Approach 1:
The mobile station performs preliminary actions by maintaining a quality table with information about multiple radio base stations before handover is needed. When quality drops, the mobile station can immediately identify alternative base stations from the pre-collected quality table, avoiding the need to search for new base stations during handover and reducing disconnection risk
Solution Approach 2:
The quality table acts as an intermediary data structure that stores pre-evaluated information about multiple radio base stations. This table allows the mobile station to quickly reference suitable handover targets without real-time negotiation, streamlining the handover process and maintaining communication continuity
2Adaptability or versatility
If the mobile station searches for neighboring base stations using radio broadcast communication, then alternative base stations can be found, but the process takes time and may fail under excessive traffic load
Solution Approach 1:
The mobile station performs preliminary scanning and evaluation of neighboring radio base stations, maintaining an updated quality table with identification information and communication quality metrics. This pre-positioning of handover target information eliminates the need for time-consuming searches during actual handover events
Solution Approach 2:
The mobile station creates and maintains a copy of relevant handover information in the quality table, including base station identification and quality metrics. This copied information is kept locally and updated periodically, allowing rapid handover decisions without real-time communication with candidate base stations
3Ease of operation
If the mobile station switches connection destination based only on communication quality comparison, then simple handover can be performed, but the switched base station may have excessive traffic load and fail to continue communication
Solution Approach 1:
The handover decision criteria are expanded from considering only communication quality parameters to include multiple parameters such as base station identification, available bandwidth, and traffic load conditions. The mobile station compares these composite parameters when selecting handover targets, ensuring both simplicity and reliability
Data Source
AI summary
A quality memory unit remembers a quality table in which qualities of communication with radio base stations are arranged according to identification information of the radio base stations. A processing unit determines, based on the quality table in the quality memory unit, a selecting radio base station to select a switching radio base station to be a connection destination after switching. The processing unit sends the quality table to the selecting radio base station when switching the connection destination radio base stations. A mobile station communication unit receives identification information specifying the switching radio base station selected based on the quality table sent from the processing unit and sends a connection request to the switching radio base station specified by the identification information.