Radio Base Station Uplink Failure Detection via Zeroed IQ Data
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Solution Overview
Problem
In radio base stations, the separation of radio equipment and radio equipment control devices connected through physical circuits hinders immediate failure detection, leading to delayed cessation of radio communications due to congestion in the control and management plane.
Innovation Solution
Implementing uplink and downlink communication processing units that transmit IQ data with specific values set to '0' when failures are detected, allowing for immediate cessation of signal transmissions across all antennas and carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radio equipment and radio equipment control are separate devices connected through physical circuit, then device modularity and flexibility are improved, but failure detection speed deteriorates
Solution Approach 1:
A physical layer monitor communication unit is introduced as an intermediary component that operates independently from the control and management plane. This monitor unit directly monitors the physical circuit connection status between radio equipment and radio equipment control, providing immediate failure detection without being affected by congestion in the higher-layer control plane.
2Reliability
If control and management plane is used for mutual monitoring, then comprehensive state monitoring is improved, but monitoring responsiveness deteriorates due to congestion
Solution Approach 1:
The monitoring function is segmented into two independent layers: a physical layer monitor communication unit that handles immediate connection status detection, and the control and management plane that handles comprehensive state monitoring. This segmentation allows the physical layer monitor to provide rapid failure detection while the control plane maintains comprehensive monitoring capabilities.
Solution Approach 2:
The physical layer monitor communication unit performs periodic monitoring of the physical circuit connection status at a frequency independent of the control plane traffic. This periodic action ensures consistent, congestion-free monitoring that can immediately detect failures regardless of control plane load.
3Adaptability or versatility
If separate devices are used for radio equipment and control, then system flexibility is improved, but immediate failure detection and cessation capability deteriorates
Solution Approach 1:
A feedback mechanism is established through the physical layer monitor communication unit that continuously monitors the physical circuit connection and provides immediate feedback about connection status. When a failure is detected, the monitor unit sends a notification to the counterparty device, enabling immediate cessation of radio communications and preventing prolonged operation in a failed state.
Data Source
AI summary
A radio base station wherein, when a radio equipment control detects an uplink communication failure on a physical circuit, a downlink communication processing unit is configured to transmit a downlink IQ data for all combinations of antennae and carriers to a radio equipment with all values of the downlink IQ data set to “0,” and a downlink radio equipment is configured to stop a transmission of a downlink signal of all the carriers through all the antenna when the downlink IQ data whose values are all “0” is received.