Group Handover for Relay Nodes and User Equipment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing handover process in mobile communications systems is inefficient, particularly for high-speed relay nodes and user equipment, leading to low handover success rates and network congestion, with no effective solution for coordinated group mobility and MME selection during handovers.
Innovation Solution
A method and device for supporting group handover that ensures continuous data reception by switching relay nodes and user equipment to the same Mobility Management Entity (MME), reducing unnecessary signaling procedures and network congestion, by coordinating the handover of relay nodes and user equipment through a unified MME, even when moving between different macro base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each UE performs handover process independently through traditional S1 or X2 handover, then handover can be performed, but it leads to unnecessary resource waste for network and easily leads to failure of handover process
Solution Approach 1:
The patent combines multiple independent handover processes into a single group handover procedure. When a relay node needs to hand over from source DeNB to target DeNB, all UEs served by the relay node are included in the group handover, allowing them to be switched simultaneously through a unified process rather than individual handovers, thus improving both success rate and efficiency
Solution Approach 2:
The patent performs preliminary actions by establishing the group handover procedure before actual handover occurs. The network prepares the handover parameters and coordinates the switching process in advance, ensuring that all UEs can be handed over efficiently when the relay node moves between different macro base stations
2Reliability
If multiple UEs simultaneously perform handover process in high-speed environment, then handover can be performed, but it leads to network congestion and resource waste
Solution Approach 1:
The patent merges the handover signaling procedures for multiple UEs into a single group handover message. Instead of sending separate handover commands to each UE, the network sends one unified handover instruction that applies to all UEs served by the relay node, significantly reducing signaling complexity and avoiding network congestion during high-speed movement
Solution Approach 2:
The group handover procedure serves multiple functions simultaneously: it coordinates handover for all UEs, manages resource allocation, and ensures service continuity in a single procedure. This multi-functional approach eliminates the need for multiple separate handover processes, reducing overall system complexity
3Productivity
If RN and UE simultaneously perform handover process, then handover can be completed, but it is difficult to ensure coordinated work
Solution Approach 1:
The patent merges the handover coordination between relay node and UEs into a unified group handover procedure. The source DeNB coordinates both the relay node handover and all UE handovers through a single procedure, ensuring that the relay node and its served UEs are switched simultaneously to the target DeNB, making coordinated work straightforward and reliable
Data Source
AI summary
The method and the device for supporting group handover are disclosed. The method supporting group handover is provided, which is applied to UE in communication with network via a RN, including: a base station S-DeNB switching RN to a base station T-DeNB; and said S-DeNB switching UE served by said RN to said T-DeNB; wherein the MME serving said RN and the MME serving UE served by said RN are the same. Another embodiment of the present invention further provides a base station supporting group handover, The technical scheme set forth in the present invention can reduce unnecessary signaling procedure, the possibility of network congestion, and can reduce the signaling procedure of handover when group handover occurs, so as to reduce the failure of the handover process and ensure the continuity of service.