Radio Base Station Handover Control via Position Registration Extraction
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Solution Overview
Problem
Current handover processes in multi-cell radio communication systems disrupt calls due to repeated position registrations, leading to call disconnections and deteriorated quality, as existing technologies fail to seamlessly manage handovers without notifying management devices and partner terminals.
Innovation Solution
A radio base station device with a call connection control section and a position registration request section that relays call connections between radio base stations, reducing the need for position registrations during handovers by controlling the call connection relay and requesting registrations only when the call is ended.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If position registration is conducted every time handover occurs between radio base stations, then the management device can recognize the current position of the radio terminal, but the call connection is disrupted and call quality deteriorates
Solution Approach 1:
The patent extracts the position registration function from the handover process itself. Instead of performing position registration every time handover occurs, the system separates these functions: handover is handled by direct communication between radio base stations, while position registration is performed only when the terminal enters or leaves a specific area. This extraction eliminates the harmful coupling between handover and position registration that causes call disruptions.
Solution Approach 2:
The patent implements preliminary action by having radio base stations exchange handover-related information in advance through direct communication before actual handover occurs. The target base station is identified and prepared beforehand, and the handover is executed smoothly without requiring position registration during the transition. Position registration is performed preliminarily only when the terminal enters or leaves a defined area.
2Adaptability or versatility
If handover is conducted by switching radio terminal to another radio base station, then communication can be maintained in multi-cell system, but repeated position registrations cause call disconnection
Solution Approach 1:
The patent introduces an intermediary mechanism where radio base stations communicate directly with each other to exchange handover information, acting as intermediaries between the source and target base stations. This direct communication channel allows handover to proceed without involving the management device in real-time, eliminating the time-consuming position registration process during handover while maintaining adaptability in multi-cell systems.
3Loss of information
If radio base station transmits position registration request to management device during handover, then position information is updated, but handover process becomes complex and call quality deteriorates
Solution Approach 1:
The patent segments the handover control process into two independent parts: (1) handover execution between radio base stations through direct communication, and (2) position registration with the management device only when the terminal enters or leaves a specific area. This segmentation simplifies the handover control by removing the complex position registration step from the handover process itself, while still maintaining accurate position information updates through the area-based registration mechanism.
Data Source
AI summary
A radio cell station CS that relays a call connection of a radio personal station PS to a management device ME, includes: a call connection control section that controls the call connection of the radio personal station PS; and a position registration request section that requests, of the management device ME, a position registration that associates identification information on the radio personal station PS with identification information on the radio cell station CS. When a request for handover from a radio cell station CS3 to a radio cell station CS4 is received from the radio personal station PS that conducts the call connection through the radio cell station CS, the call connection of the radio personal station PS goes through the radio cell station CS4 and the radio cell station CS2 under control. While the call connection going through the radio cell station CS2 is being conducted, the position registration is not requested of the management device ME. When the call connection going through the radio cell station CS4 and the radio cell station CS2 is ended, the position registration is requested of the management device ME.