Mobile IAB Mobility Management Reducing Signaling Load
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, dynamic changes in mobile Integrated Access Backhaul (IAB) topologies lead to increased network resource usage during handover and location information changes, resulting in signal loss and service interruptions due to high signal loads.
Innovation Solution
A method and apparatus for a terminal to manage mobility by requesting access to a mobile IAB, receiving and responding to tracking area update procedure messages, and performing measurement procedures based on control messages from the IAB donor control unit, thereby reducing redundant measurements and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If handover and location information change procedures are performed simultaneously for terminals connected to mobile IAB, then mobility management is updated, but network resource usage increases significantly causing signal loss and service interruption
Solution Approach 1:
The patent combines handover procedures and location information change procedures into a single integrated process. When a mobile IAB node performs handover, the network simultaneously updates location information for all connected terminals without requiring separate procedures, thereby reducing redundant signaling and network resource consumption while maintaining mobility management adaptability
Solution Approach 2:
The patent introduces an intermediary mechanism where the mobile IAB node acts as a mediator between the core network and connected terminals. The IAB node coordinates handover and location updates centrally, allowing the network to manage mobility changes efficiently without requiring each terminal to independently perform location information changes, thus reducing overall network resource usage
2Measurement precision
If redundant measurement procedures are performed for signal strength measurement, then location tracking accuracy is improved, but measurement time and network resources increase
Solution Approach 1:
The patent implements preliminary action by having the mobile IAB node perform measurement procedures in advance before actual handover decisions are needed. The node pre-measures signal strengths of neighboring cells and stores this information, so when handover is required, the network can quickly make decisions without requiring terminals to perform time-consuming real-time measurements, thus maintaining location tracking accuracy while reducing measurement time
Solution Approach 2:
The patent applies self-service by enabling the mobile IAB node to autonomously perform measurement procedures and manage its own mobility management tasks. The node independently measures signal strengths, evaluates handover conditions, and coordinates location updates without requiring continuous intervention from the core network or individual terminals, thereby reducing overall measurement time and network resource consumption while maintaining accurate location tracking
Data Source
AI summary
A method of a terminal, according to an exemplary embodiment of the present disclosure, may include: requesting access to a mobile integrated access backhaul (IAB) based on cell search; receiving a tracking area (TA) update procedure stop request message from an Access and Mobility Management Function (AMF) of a core network; and deactivating a TA update procedure based on the TA update procedure stop request message.