HeNB Gateway Handover Control via X2 Interface
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The current handover process between Macro-eNB and HeNB in mobile communication networks relies solely on the S1 interface, causing significant pressure on the network due to frequent handovers, especially with a large number of HeNBs covering small areas.
Innovation Solution
Implementing handover control using the S1 interface between HeNB and HeNB GW, and the X2 interface between HeNB GW and Macro-eNB, to simplify the handover process and reduce network pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover between Macro-eNB and HeNB is implemented through the S1 interface only, then handover can be achieved, but network pressure increases significantly due to frequent handovers
Solution Approach 1:
The patent introduces an X2 interface as an intermediary communication path between Macro-eNB and HeNB GW, allowing handover signaling to bypass the core network (MME). This mediator interface handles handover requests and acknowledgments directly at the access network level, reducing the burden on S1 interface and core network while maintaining reliable handover functionality
2Reliability
If handover between Macro-eNB and HeNB is implemented through the S1 interface only, then handover can be achieved, but the handover process becomes complex
Solution Approach 1:
The patent segments the handover process into two distinct interface pathways: S1 interface for initial context setup and X2 interface for actual handover execution. This segmentation allows the complex handover procedure to be divided into manageable stages, with the X2 interface handling the time-critical signaling separately from the S1 interface's broader control plane functions, thereby simplifying the overall process
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Embodiments of the present invention provide a method and system for controlling handover of a user terminal device. The method includes: receiving, by a Home Evolved NodeB Gateway (HeNB GW), a handover request of a User Equipment (UE), on which handover needs to be performed, sent from a source eNB, converting the handover request into a handover request which satisfies an interface form between the HeNB GW and a target eNB, and sending the converted handover request to the target eNB; sending, by the target eNB, to the HeNB GW a handover request acknowledgement message if the target eNB permits the UE to access; and receiving, by the HeNB GW, the handover request acknowledgement message sent from the target eNB, converting the handover request acknowledgement message into a handover request acknowledgement message which satisfies an interface form between the source eNB and the HeNB GW, and sending the converted handover request acknowledgement message to the source eNB. Embodiments of the present invention implement the handover of the UE between the Macro-eNB and the HeNB through the S1 interface between the HeNB and the HeNB GW and the X2 interface between the HeNB GW and the Macro-eNB, which reduces the pressure of the core network.