Radio Base Station Handover Location Reporting Continuity
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Solution Overview
Problem
In conventional mobile communication systems based on the UMTS scheme, when a mobile station performs a handover from one radio network controller to another, the handover target controller cannot take over the 'Location Reporting Control message', necessitating retransmission of the message by the core network apparatus after the handover procedure is completed.
Innovation Solution
A mobile communication method and radio base station configuration where the first radio base station transmits a location information reporting instruction to the second radio base station during a handover, allowing continuous reporting of the mobile station's location information to the core network apparatus without the need for retransmission of the 'Location Reporting Control message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional UMTS location reporting procedure is used, then the core network apparatus can acquire location information on the mobile station, but the Location Reporting Control message cannot be taken over during handover, requiring retransmission
Solution Approach 1:
The source radio base station performs preliminary action by including the location reporting instruction in the handover request message sent to the target radio base station before the handover is completed. This allows the target radio base station to have the instruction ready and available, eliminating the need for retransmission after handover and ensuring continuous location reporting.
2Ease of operation
If the Location Reporting Control message is retransmitted after handover, then the target radio base station can receive the instruction, but the handover procedure becomes more complex and time-consuming
Solution Approach 1:
The invention merges the location reporting instruction transmission with the handover procedure by including the instruction in the handover request message. This consolidation eliminates the need for a separate retransmission step, simplifying the overall procedure and improving handover completion speed without sacrificing the ability to deliver the location reporting instruction to the target base station.
Data Source
AI summary
A mobile communication method according to the present invention includes the steps: transmitting, from an exchange (MME) to a first radio base station (eNB), a location information reporting instruction which provides an instruction to report location information on a mobile station (UE); reporting, the first radio base station (eNB) to the exchange (MME), the location information on the mobile station (UE), in accordance with the location information reporting instruction; transmitting, the location information reporting instruction to a second radio base station (eNB), in a handover procedure of the mobile station (UE) from the first radio base station (eNB) to the second radio base station (eNB); and reporting, from the second radio base station (eNB) to the exchange (MME), the location information on the mobile station (UE), in accordance with the location information reporting instruction.