Relay Backhaul Link Failure Detection in Cellular Base Stations
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Solution Overview
Problem
In relay communication, disconnected wireless links between relay apparatuses are not promptly recognized, leading to wastage of radio resources and increased time for communication path reconfiguration due to the inability of base station and relay apparatuses to detect disconnections in a timely manner, especially in tree-type network topologies.
Innovation Solution
The base station apparatus uses an LTE wireless communication line to notify relay apparatuses of disconnections, allowing for simultaneous notification along the communication path and reducing the time required for re-establishing wireless links by identifying the disconnection reason and adjusting transmission power or frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay communication is established between base station and terminal through relay apparatus, then communication coverage is extended to remote areas, but disconnection detection capability deteriorates causing delayed recognition of link failures
Solution Approach 1:
The patent introduces a base station as an intermediary that centrally monitors communication status between relay apparatuses and terminals. The base station receives uplink signals from terminals and determines whether relay apparatuses are properly connected, acting as a mediator that solves the disconnection detection problem without requiring complex detection mechanisms at each relay apparatus.
2Device complexity
If traditional relay communication protocol is used, then simple relay function is achieved, but radio resource wastage occurs due to undetected disconnections
Solution Approach 1:
The patent implements a feedback mechanism where the base station continuously monitors uplink signals from terminals and provides feedback information about connection status to relay apparatuses. This feedback enables the system to detect disconnections and stop transmitting downlink signals to disconnected terminals, preventing radio resource wastage while maintaining protocol simplicity.
3Ease of operation
If disconnection detection is not implemented, then system operation is simple, but time for communication path reconfiguration increases
Solution Approach 1:
The patent performs preliminary detection of disconnection status by monitoring uplink signals before initiating reconfiguration actions. The base station determines connection status in advance and can promptly reassign radio resources or switch to alternative paths when disconnections are detected, reducing reconfiguration time while maintaining simple operation through automated base station control.
Data Source
AI summary
A base station apparatus, configured to establish a wireless link for a backhaul line with a relay apparatus, and provide a first period in which a radio resource is used by the base station apparatus for the backhaul line, and a second period in which the radio resource is not used by the backhaul line.