Virtual Area Identifiers for Relay-Terminal Mobility Management
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Solution Overview
Problem
Existing mobility management procedures in wireless communication systems, particularly involving relay terminals and remote terminals, result in significant network load due to simultaneous signaling operations during handovers, necessitating a more efficient approach.
Innovation Solution
Implementing a mobility management method where relay terminals generate and manage virtual area identifiers for remote terminals, performing area update procedures and storing temporary identifiers to reduce network load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobility management procedures are performed for each remote terminal individually when relay terminal moves, then mobility management is completed for each terminal, but large network load is generated due to simultaneous signaling operations
Solution Approach 1:
The patent merges mobility management procedures for multiple remote terminals by introducing a representative remote terminal mechanism. When a relay terminal moves to a new base station, only one representative remote terminal performs the area update procedure instead of all remote terminals performing simultaneous updates. This combining approach maintains mobility management reliability while significantly reducing network load from redundant signaling operations.
Solution Approach 2:
The representative remote terminal serves multiple functions: it acts as a normal remote terminal for data communication and simultaneously serves as a mobility management representative for all remote terminals connected through the relay. This multi-functionality allows a single terminal to handle mobility signaling for the entire group, reducing overall network load while ensuring proper mobility management.
2Loss of information
If area update procedure is performed by each remote terminal simultaneously, then each terminal updates its location, but signaling overhead increases causing network congestion
Solution Approach 1:
The patent combines location update procedures for multiple remote terminals into a single representative terminal's procedure. The representative remote terminal performs the area update with the base station on behalf of all remote terminals, ensuring location information is accurately updated while eliminating redundant signaling overhead that would occur if each terminal performed individual updates simultaneously.
3Reliability
If relay terminal performs mobility management for all remote terminals, then mobility is managed centrally, but relay terminal processing complexity increases
Solution Approach 1:
The patent introduces a representative remote terminal as an intermediary between the relay terminal and the base station for mobility management procedures. Instead of the relay terminal directly managing all remote terminals' mobility, the representative remote terminal acts as a mediator that handles area update procedures with the base station, thereby reducing the relay terminal's processing complexity while maintaining centralized mobility control.
Data Source
AI summary
An operation method of a relay terminal may include: receiving, from a first base station to which the relay terminal is connected, a first area identifier for a first area corresponding to the first base station; generating a first virtual area identifier distinct from the first area identifier; transmitting the first virtual area identifier to a first remote terminal connected to the first base station through relaying of the relay terminal; performing a first area update procedure triggered by the first remote terminal based on the first virtual area identifier; and storing a first temporary identifier obtained based on the first area update procedure, wherein the first temporary identifier is used for a paging procedure for the first remote terminal.