Relay Node Replacement in Wireless Networks
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Solution Overview
Problem
In wireless communication systems, deploying additional base stations in certain environments, such as urban areas with many vehicles and using drones as relays, faces challenges like interference and inefficient relay replacement, leading to potential radio link failures and handover issues.
Innovation Solution
A method where a base station receives assistant information from a relay node, initiates a replacement procedure, deactivates the old relay node, and activates a new one, ensuring seamless handover of user equipment and managing power and coverage issues by transmitting appropriate indications and performing handover procedures based on conditions like power levels and time thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay nodes are deployed in vehicle-mounted and drone-mounted scenarios, then coverage extension and network flexibility are improved, but radio link failures and handover issues increase due to interference and unstable relay replacement
Solution Approach 1:
The base station receives assistant information from the relay node in advance, including remaining power, serving time, and UE handover status. This preliminary information gathering enables the base station to proactively initiate replacement procedures before radio link failures occur, allowing smooth transition from old relay nodes to new ones without disrupting service continuity.
Solution Approach 2:
The system implements a feedback mechanism where relay nodes continuously report their status (power level, serving duration, UE handover completion) to the base station. The base station uses this feedback to determine optimal replacement timing, ensuring that relay node replacement occurs only when conditions are favorable, thus maintaining radio link stability during transitions.
2Reliability
If relay node replacement is performed frequently to maintain optimal coverage, then coverage quality is improved, but system complexity and handover management burden increase
Solution Approach 1:
Relay nodes autonomously monitor their own status parameters (remaining power, serving time, UE connection state) and automatically send assistant information to the base station when replacement conditions are met. This self-service approach eliminates the need for complex centralized control and frequent manual interventions, simplifying the replacement procedure while maintaining optimal coverage quality.
Solution Approach 2:
The system uses multiple parameters (remaining power threshold, serving time threshold, UE handover status) to determine relay node replacement timing. By changing from single-parameter to multi-parameter decision-making, the system achieves more accurate replacement timing, reducing unnecessary replacements and simplifying overall system management while maintaining coverage quality.
3Productivity
If assistant information is collected from relay nodes to enable smooth replacement, then handover efficiency is improved, but information transmission overhead and processing burden increase
Solution Approach 1:
The system extracts only the most critical assistant information parameters needed for replacement decisions (remaining power, serving time, UE handover status) from relay nodes. By selecting and transmitting only these essential parameters rather than complete operational data, the system achieves efficient handover management while minimizing information transmission overhead and processing burden.
Data Source
AI summary
Embodiments of the present disclosure relate to methods and apparatuses for relay replacement. According to some embodiments of the disclosure, a method may include: receiving assistant information associated with a first network node, which functions as a relay node between the BS and a user equipment (UE); and in response to initiating a replacement procedure to replace the first network node based on the received assistant information, deactivating the first network node and activating a second network node as the relay node.