Mobile Relay Handover via Source Donor eNodeB Intermediary
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current technologies lack a mobile wireless relay system and effective handover method to support the mobility of mobile relays, which hinders practical applications, especially in scenarios where mobile relays are deployed on vehicles to enhance wireless communication services.
Innovation Solution
A handover method and system that utilizes a source Donor eNodeB as an intermediate node to connect a relay access network with an Evolved Packet Core, where data is forwarded between the source and target Donor eNodeBs, and the mobile relay reconfigures its Un interface to ensure seamless handover, with the Evolved Packet Core transforming data forwarding paths based on control from the target Donor eNodeB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mobile relay is deployed to extend wireless coverage and improve communication quality in mobile scenarios, then coverage area and adaptability are improved, but handover capability and network stability deteriorate because current technologies lack support for mobile relay handover
Solution Approach 1:
The patent introduces a source Donor eNodeB as an intermediate node to facilitate the handover process of the mobile relay. The source Donor eNodeB connects the relay access network with the Evolved Packet Core and forwards data between the target Donor eNodeB and the core network, enabling seamless handover while maintaining network stability and coverage continuity.
Solution Approach 2:
The patent enables dynamic handover of the mobile relay by allowing the Un interface configuration to be reconfigured from source to target Donor eNodeB. This dynamic reconfiguration allows the mobile relay to transition between different network nodes while maintaining continuous service, thus improving both adaptability and reliability.
2Reliability
If data forwarding through source Donor eNodeB is implemented during handover, then communication continuity is improved, but network complexity increases due to additional intermediate nodes and forwarding paths
Solution Approach 1:
The source Donor eNodeB performs multiple functions simultaneously: it acts as a gateway between the relay access network and the Evolved Packet Core, forwards user data between the target Donor eNodeB and the core network, and manages control plane signaling. This multi-functionality reduces the need for separate dedicated components, thereby managing complexity while ensuring communication continuity.
3Reliability
If Un interface reconfiguration is performed during mobile relay handover, then handover seamlessness is improved, but signaling overhead increases due to configuration exchange between network nodes
Solution Approach 1:
The patent performs preliminary Un interface configuration setup at the source Donor eNodeB before the actual handover occurs. The source Donor eNodeB pre-configures the necessary parameters and maintains the interface settings, allowing for a smoother transition with reduced signaling overhead during the actual handover execution, as the configuration is already prepared and validated.
Data Source
AI summary
The present invention provides a handover method based on a mobile relay comprising: when handover of the mobile relay occurs, a source Donor evolved NodeB (DeNB), as an intermediate node, connecting a relay access network with an Evolved Packet Core (EPC), the relay access network at least comprising a target DeNB and a mobile relay; and the source DeNB forwarding data from the relay access network to the EPC and forwarding the data from the EPC to the relay access network. With the present invention, the handover of the mobile relay is implemented, and the mobility of the relay can be supported.