Direct Handover Signaling Path for Network Congestion
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Solution Overview
Problem
Conventional handover procedures in communication networks are complex and prone to network congestion due to multiple interactions between Mobility Management Entities (MME) and Evolved Node Bs (ENBs), especially during inter-RAT handovers, which increases signaling burden and wastes network resources.
Innovation Solution
A direct handover method where a source-side access network node transmits a handover message to a target-side access network node, which selects a target-side core network node and requests context information from the source-side core network node, reducing the number of signaling interactions and avoiding network congestion by initiating a resource release after successful handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple interactions between MME and ENB are involved in the handover procedure, then the handover can be completed with proper context information transfer, but the signaling procedure becomes complicated and network congestion is easily caused
Solution Approach 1:
The patent extracts the core handover signaling interactions between MME and ENB, identifying and removing unnecessary intermediate signaling steps. The direct handover method eliminates redundant context information requests and responses by establishing a direct signaling path, thereby simplifying the overall procedure while maintaining reliable context transfer.
Solution Approach 2:
The patent inverts the traditional handover signaling flow by allowing the target ENB to directly request context information from the source MME without requiring multiple intermediate interactions. This inversion of the conventional signaling sequence reduces complexity while ensuring reliable handover completion.
2Reliability
If many UEs initiate similar handovers through multiple MME-ENB interactions, then context information can be properly transferred, but network congestion is easily caused
Solution Approach 1:
The patent implements preliminary action by pre-establishing direct signaling paths and pre-configuring context information transfer mechanisms. The target ENB is prepared to directly request and receive context information from the source MME without requiring sequential intermediate steps, enabling faster handover execution and reducing network congestion during high-volume handover scenarios.
3Adaptability or versatility
If inter-RAT handover involves Serving GPRS Support Node, SGSN and MME interactions, then the handover between different RATs can be completed, but the signaling burden of the network increases
Solution Approach 1:
The patent applies universality by creating a unified direct handover mechanism that works across different RAT types (GERAN/UTRAN and EUTRAN). The same direct signaling approach between target ENB and source MME/SGSN is used regardless of the specific RAT combination, thereby maintaining inter-RAT handover capability while reducing the signaling burden through a consistent simplified procedure.
Data Source
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AI summary
The present invention is applicable to the field of communications, and provides a direct handover method and device. The method comprises: receiving a handover message sent by a source side access network node; selecting a destination side core network node, and sending a handover message to the destination side core network node, so that the destination side core network node obtains context information of a UE from a source side core network node; receiving a handover acknowledge message sent by the destination side core network node. In the embodiment of the present invention, the source side access network node sends the handover message to a destination side access network node, the destination side access network node selects the destination side core network node, and sends the handover message to the destination side core network node, and the destination side core network node requests the context information of the UE from the source side core network node, so as to complete the handover. Therefore, the handover can be achieved through signaling exchanging between a small number of nodes, thereby avoiding network congestion caused by multiple times of signaling exchanging.