Base Station Grouping for Wireless Handoff Quality
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Solution Overview
Problem
Wireless communication systems in private networks face challenges in maintaining communication quality due to random base station installations, leading to service interruptions and decreased accuracy in services like IP phone and position detection, as they are not optimized for the required quality and often result in handoff issues.
Innovation Solution
A connection control method that classifies base stations into groups with unique identifiers, calculates communication quality indices such as received power or bit rate for each group, and selects the best base station within the group as the connection destination, ensuring high-quality communication services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a terminal connects to a base station with the maximum received power, then the connection is simple and fast, but the communication quality deteriorates when the terminal moves even a short distance
Solution Approach 1:
The invention segments base stations into multiple groups based on their installation locations and service characteristics. Instead of treating all base stations uniformly, the terminal is divided into different service groups (e.g., IP phone service, position detection service, data communication service), and each group connects to base stations optimized for its specific requirements. This segmentation resolves the contradiction by allowing simple connection within the appropriate group while maintaining stable communication quality through location-optimized base station selection.
Solution Approach 2:
The invention applies local quality by assigning different connection strategies to different service groups based on their specific requirements. For example, IP phone service terminals are directed to base stations in areas with good voice communication quality, while position detection terminals connect to base stations with accurate location information. This ensures that each service group connects to base stations with locally optimized quality characteristics rather than simply the strongest signal.
2Ease of manufacture
If base stations are installed randomly based on ease of connection or furniture arrangement, then installation is simple and low cost, but position detection accuracy decreases and service quality deteriorates
Solution Approach 1:
The invention segments base stations into different groups based on their installation locations and the services they are optimized to provide. Even though base stations may be installed randomly for ease of deployment, the system segments them into groups such as those suitable for position detection, IP phone service, and data communication. This segmentation allows the system to maintain installation simplicity while improving service quality by directing different service types to appropriately grouped base stations.
Solution Approach 2:
The invention changes the selection parameter from simple signal strength to service-specific quality metrics. For position detection services, terminals select base stations based on parameters optimized for location accuracy rather than just received power. This parameter change allows the system to accommodate random base station installations while maintaining or improving position detection accuracy by selecting base stations from groups optimized for detection services.
3Duration of action of stationary object
If handoff is performed by switching to the next base station when signal power falls below threshold, then connection continuity is attempted, but communication quality deteriorates during handoff and service may be interrupted
Solution Approach 1:
The invention applies preliminary action by pre-classifying base stations into service-specific groups before handoff is needed. When a terminal requires handoff, it already knows which group of base stations is appropriate for its service type, eliminating the need to search for suitable base stations during handoff. This preliminary classification ensures that handoff occurs within the same service-optimized group, maintaining communication quality while ensuring connection continuity.
Solution Approach 2:
The invention makes the handoff process dynamic by allowing terminals to switch between base stations within their service group based on real-time signal conditions, while the group classification remains stable. This dynamic adjustment within a fixed service framework allows continuous adaptation to changing conditions without sacrificing the quality optimizations established by the group segmentation.
4Measurement precision
If a terminal connects to a master base station for position detection service, then position detection accuracy is high, but the terminal cannot connect to other base stations during handoff
Solution Approach 1:
The invention applies universality by creating multiple base station groups that can each serve different service types. Instead of having a single master base station, the system creates groups of base stations that are all capable of providing position detection service, as well as groups for IP phone service and data communication service. This allows terminals to connect to any base station within their service group, providing both high detection accuracy and handoff capability.
Solution Approach 2:
The invention segments the single master base station concept into multiple base station groups, where each group is optimized for specific services. For position detection, there are multiple base stations in detection-optimized groups rather than relying on a single master base station. This segmentation allows terminals to maintain connection within their service group during handoff while still achieving high position detection accuracy through group-optimized base station selection.
Data Source
AI summary
When one base station to which a terminal is to connect is determined from a plurality of base stations in a wireless communication system, the best base station is selected according to the communication quality or the content of communication services. In the wireless communication system, the plurality of base stations are classified into a plurality of groups. Indexes of communication quality between the base stations and the terminal are obtained and, for each group, the characterizing quantities of the indexes of communication quality are calculated. The base station group with which the terminal is to communicate is specified based on the characterizing quantities. One of the base stations in the specified group is determined as a communication destination base station.