Handover Sequence Number Transfer for Mobile Data Integrity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Data loss occurs when a radio UE moves away to a new base station, as existing methods rely solely on the base station controller to handle handovers, leading to delayed data handling.
Innovation Solution
The radio UE transfers a sequence number for specific data to the new base station during handover, enabling efficient data transfer by including sequence information in request messages and suspending/reinitiating data transmission accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station controller handles handovers, then control is centralized and reliable, but data transfer speed decreases and data loss occurs during handover
Solution Approach 1:
The patent segments the handover control function by separating control plane operations (handled by base station controller) from user plane data transfer (handled directly by base stations). This allows the UE to directly transfer sequence number information to the target base station, enabling parallel data transfer while maintaining centralized control for reliability.
Solution Approach 2:
The patent introduces sequence number information as an intermediary element that enables the UE to directly communicate data transfer state to the target base station during handover, bypassing the need for all data control to go through the base station controller, thus improving transfer speed while maintaining reliability.
2Reliability
If the base station controller handles all data during handover, then data integrity is maintained, but handover time increases
Solution Approach 1:
The patent applies preliminary action by having the UE prepare and transfer sequence number information to the target base station before or during the handover process. This allows the target base station to be pre-configured with the correct data state, eliminating delays during the actual handover execution while maintaining data integrity through the sequence number mechanism.
3Reliability
If sequence number information is transferred during handover, then data loss is prevented, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential sequence number information from the complete data state and transfers it during handover. This minimal information extraction is sufficient to prevent data loss while avoiding the overhead of transferring complete data buffers or extensive control messages, thus balancing reliability with signaling efficiency.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A method of signalling in a mobile communication system, and more particularly, to a method of processing control information associates with handover in a mobile communication system is disclosed. In a radio (UE) user equipment receiving a service from a radio network including a plurality of base stations (E-NODE B), a control node (E-RNC) performing a control operation above the base stations and a processing node (SG5N) processing a user traffic above the base stations, the present invention includes the steps of transmitting a request message making a request for a specific service provided by a first base station to a second base station, the request message including control information indicating data to be received by the radio user equipment and receiving the data corresponding to the control information from the second base station.