Handover Packet Count Transfer for Accurate Charging
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Solution Overview
Problem
In LTE mobile communication systems, the lack of a disconnect signal from the CN Node to the Source eNodeB prevents accurate reporting of the number of packets successfully received by the UE before handover, leading to inaccurate charging.
Innovation Solution
The mobile source base station transfers information on the number of packets communicated to the mobile target base station during handover, which then notifies the CN Node of this data in a Handover Complete message, ensuring accurate reporting and charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the Source eNodeB reports packet count to CN Node after handover, then charging accuracy is improved, but handover signal load on CN Node increases enormously
Solution Approach 1:
The patent extracts the packet count information from the handover signaling path and reports it separately through the S1 interface after handover completion. This separates the charging information reporting from the handover signaling flow, reducing the load on CN Node during handover while ensuring accurate packet count reporting for charging purposes.
2Productivity
If handover signals are exchanged directly between Source eNodeB and Target eNodeB, then handover signal load on CN Node is reduced, but packet count information may be lost
Solution Approach 1:
The patent implements a feedback mechanism where the Source eNodeB reports the packet count information to the CN Node after handover completion through the S1 interface. The CN Node receives this feedback information containing the packet count, ensuring that charging-related information is preserved even when handover signaling is optimized to reduce CN Node load.
Data Source
AI summary
A mobile communication system which can transfer information on the number of packets counted up until then by a base station of a mobile source, to a base station of a mobile target, even when a terminal performs a handover. UE moves to a Target eNode B, but a Source eNode B decides to perform a handover, and the Source eNode B includes information on the number of packets counted up until then in a Handover Request message to the Target eNode B, so as to notify the Target eNode B. After receiving a Handover Confirm message from the UE, the Target eNode B includes information on the number of packets received from the Source eNode B in a Handover Complete message transmitted to a CN Node, so as to notify the CN Node.