Handover Control Method for Wireless Base Stations
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Solution Overview
Problem
Conventional mobile communication systems experience inefficiencies in radio resource management during handovers, leading to waste of resources and reduced transmission efficiency due to the transmission of redundant information between radio base stations and mobile stations.
Innovation Solution
A method where only difference information between the radio-related information sets by the connection source and target radio base stations is transmitted during a handover, with the source radio base station generating a handover request signal, the target radio base station extracting and acknowledging this difference, and the source radio base station generating a handover command signal based on this difference to update the mobile station's information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complete radio related information is transmitted during handover, then the mobile station receives all necessary information for handover execution, but radio resources are wasted due to transmission of redundant information
Solution Approach 1:
The patent extracts only the necessary difference information between source and target radio base stations during handover. The target radio base station compares its configured information with the source base station's information, extracts only the differing elements, and transmits only these difference information to the mobile station, eliminating redundant information transmission while maintaining handover reliability.
Solution Approach 2:
The handover information transmission is segmented into essential components. Instead of transmitting complete radio related information, the system segments the information transmission to include only the difference elements between source and target bases, reducing the data volume while preserving the critical information needed for successful handover.
2Reliability
If all radio related information is transmitted during handover, then the mobile station has complete information, but transmission efficiency is reduced due to redundant data
Solution Approach 1:
The system extracts only the essential difference information from the complete set of radio related information. By comparing source and target base station configurations and transmitting only the differing elements, the patent maintains information completeness for handover execution while significantly improving transmission efficiency by eliminating redundant data.
Solution Approach 2:
The patent changes the parameter of information transmission from complete data to difference information. By transforming the transmission content to include only the delta between source and target configurations, the system maintains the necessary information completeness while optimizing transmission efficiency through reduced data volume.
3Reliability
If redundant information is transmitted during handover, then the mobile station receives comprehensive data, but radio resource utilization is optimized poorly
Solution Approach 1:
The patent extracts only the necessary difference information for handover execution. The target radio base station identifies and transmits only the essential differing parameters between source and target configurations, reducing the quantity of transmitted information while maintaining sufficient handover information for reliable mobile station operation.
Solution Approach 2:
Instead of transmitting complete information (excessive action), the patent applies partial action by transmitting only the difference information that is actually needed for handover. This partial transmission approach reduces radio resource consumption while providing just enough information for successful handover execution.
Data Source
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AI summary
A radio base station (200A) according to the present invention includes: a radio related information retainer unit (206) configured to retain radio related information on connection between a mobile station (100) and the radio base station (200A); a handover request signal generator/transmitter unit (208) configured to transmit a handover request signal including the radio related information retained by the radio related information retainer unit (206) to a connection target radio base station (200B); and a handover command signal generator/transmitter unit (202) configured to transmit, to the mobile station, a handover command signal for notifying difference information between the radio related information retained by the radio related information retainer unit (206) and radio related information set by the connection target radio base station (200B) based on a handover request acknowledgment signal.