Relay Node Backhaul Link Quality Recovery Signaling
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Solution Overview
Problem
In wireless communication systems, when the quality of the backhaul link between a relay node (RN) and a base station (BS) is degraded, despite a good access link quality, conventional methods fail to address the issue, leading to inability to transmit information and data between the RN and user equipment (UE).
Innovation Solution
A method and apparatus for processing radio link quality degradation, involving determining the quality of the radio link between nodes, recovering the link when it falls below a threshold, and transmitting signaling messages to control communication on the access link between the RN and UE, including wait messages, DTX/DRX setup, or connection re-establishment requests, to manage the access link during backhaul link recovery or handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional radio link recovery schemes are used, then access link quality is maintained, but communication between RN and UE fails when backhaul link quality is degraded
Solution Approach 1:
The relay node performs preliminary actions by detecting backhaul link quality degradation and proactively initiating link recovery procedures or transmitting control signals to the UE before complete communication failure occurs. This allows the system to maintain communication reliability by addressing backhaul issues before they fully impact access link performance.
Solution Approach 2:
The relay node acts as an intermediary between the base station and UE, detecting backhaul link quality and mediating communication by initiating recovery procedures or controlling UE transmission based on backhaul conditions. This intermediary role allows the system to adapt to backhaul degradation while maintaining access link communication.
2Reliability
If the RN monitors and manages the access link based on backhaul link quality, then communication reliability improves, but signaling complexity increases
Solution Approach 1:
The relay node performs self-service by autonomously monitoring its own backhaul link quality and independently initiating recovery procedures or transmitting control signals to the UE without requiring complex external coordination. This self-service approach improves reliability while minimizing additional signaling complexity.
Solution Approach 2:
The relay node implements feedback mechanisms by continuously monitoring backhaul link quality and using this feedback to trigger appropriate actions such as link recovery procedures or UE transmission control. This feedback-based approach ensures reliable communication while keeping signaling manageable through event-triggered rather than continuous control.
Data Source
AI summary
A method and apparatus for processing degradation of radio link quality in a wireless communication system supporting relays are disclosed. The method includes determining quality of a radio link between the first node and the communication apparatus, recovering the radio link between the first node and the communication apparatus, when the quality of the radio link between the first node and the communication apparatus is decreased to or below a predetermined threshold, and transmitting to the second node a signaling to control communication on a radio link between the second node and the communication apparatus, when the quality of the radio link between the first node and the communication apparatus is decreased to or below the predetermined threshold.