Mobile Relay Node Tracking Area Configuration for High-Speed Railway
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In high-speed railway communication scenarios, the movement of mobile relay nodes (RN) leads to inconsistent tracking area configurations, causing simultaneous location updates among numerous User Equipments (UEs) and potential paging failures due to improper tracking area updates and configurations.
Innovation Solution
Configuring dedicated tracking areas for mobile relay nodes and Donor eNodeBs, ensuring that the tracking area identifier lists allocated to UEs include the dedicated tracking area, and updating tracking area information for Mobility Management Entities (MMEs) when necessary to maintain consistent configuration and enable correct paging routes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile relay nodes perform handover among different Donor eNBs during high-speed movement, then communication continuity is maintained, but tracking area configuration inconsistency causes simultaneous location updates among numerous UEs and potential paging failures
Solution Approach 1:
The patent segments the tracking area management by introducing a dedicated tracking area specifically for mobile relay nodes, separate from regular UEs. This dedicated tracking area is configured separately and managed independently, allowing mobile RNs to maintain their location information without affecting the tracking area configurations of other UEs served by the same DeNB.
Solution Approach 2:
The patent introduces a dedicated tracking area as an intermediary mechanism between mobile relay nodes and the core network. This dedicated tracking area acts as a mediator that allows the MME to correctly identify and page mobile RNs without requiring changes to the tracking area configurations of regular UEs, thus resolving the configuration inconsistency problem during handovers.
2Reliability
If dedicated tracking area is configured for mobile relay nodes, then simultaneous location updates are prevented, but additional configuration complexity is introduced for tracking area management
Solution Approach 1:
The patent applies local quality by configuring a dedicated tracking area specifically for mobile relay nodes, while regular UEs continue to use the existing tracking area structure. This localized approach affects only mobile RNs and their associated UEs, leaving the rest of the network configuration unchanged, thus minimizing overall system complexity.
Solution Approach 2:
The dedicated tracking area is pre-configured and pre-registered in the MME before mobile relay nodes perform handovers. This preliminary configuration ensures that when mobile RNs move between DeNBs, their location information is already correctly associated with the dedicated tracking area, preventing simultaneous location updates and eliminating the need for complex dynamic reconfiguration during handovers.
Data Source
AI summary
A method and apparatus for mobile relay node tracking area configuration and location update. The method includes: configuring a dedicated tracking area for a Donor eNodeB (DeNB); configuring a dedicated tracking area for a mobile Relay Node (RN) accessing the DeNB; when a terminal (UE) accessing the mobile RN registers or tracking area updates, allocating a tracking area identifier list containing the dedicated tracking area to the UE; the dedicated tracking area is a tracking area code dedicated to a mobile relay. The method and apparatus try the best to guarantee that a paging area list allocated to the UE contains the tracking area configured for the mobile relay serving the UE, thereby avoiding that numerous UEs served by the RN trigger location update simultaneously in the process of the RN moving.