Central Unit Power Control for Distributed Antenna Reliability
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Solution Overview
Problem
Existing communication systems for autonomous vehicles face challenges in maintaining reliable data transmission and reception using distributed antennas, particularly in managing faults and ensuring consistent performance across multiple antennas.
Innovation Solution
A communication device with a central unit connected to distributed units through digital serial interfaces, which measures channel quality, controls power distribution, and performs hardware or software resets based on fault types to maintain reliable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If distributed antennas are installed at the end terminal level, then coverage and reliability are improved, but device complexity increases
Solution Approach 1:
The communication device is segmented into a main controller and multiple distributed antenna modules, allowing the system to distribute signal processing functions across multiple independent units. Each antenna module operates semi-independently, improving coverage and reliability while managing complexity through modular design
Solution Approach 2:
The main controller serves multiple functions: it acts as a central coordination unit, a distributed unit for signal processing, and a control unit for managing antenna operations. This multi-functionality reduces the need for separate dedicated components, thereby managing device complexity while maintaining reliability
2Area of stationary object
If multiple distributed antenna modules are used, then coverage area is improved, but power consumption increases
Solution Approach 1:
The system implements periodic monitoring of link connection status between the main controller and distributed antenna modules. By detecting abnormalities periodically and switching to backup configurations when needed, the system maintains coverage area while managing power consumption through on-demand activation of additional modules
Solution Approach 2:
The system dynamically adjusts operational parameters such as power allocation and signal processing intensity based on detected link status. When link abnormalities are detected, parameters are changed to prioritize reliable communication over maximum coverage, thereby managing power consumption while maintaining essential coverage
3Reliability
If link connection status monitoring is implemented, then reliability is improved, but measurement precision requirements increase
Solution Approach 1:
The system implements continuous feedback monitoring of link connection status between the main controller and distributed antenna modules. By using feedback from channel quality measurements to trigger reliability-based switching decisions, the system achieves high reliability without requiring extreme measurement precision - feedback loops compensate for measurement variations through adaptive adjustment
Data Source
AI summary
A communication device includes a plurality of distributed units (DUs), each including an antenna; and a central unit (CU) which is arranged to be spaced from each of the plurality of DUs, and which is connected through each of the plurality of DUs and a plurality of DU links. The central unit measures the channel quality of each of the plurality of DU links, and the central unit can perform control so that power is cut off to the DU corresponding to the DU link if it is determined that the DU link is in an abnormal status during the operation time of a timer (TDU_link) associated with the connection to the DU link, and perform control so that power is supplied to the DU corresponding to the DU link if it is determined that the DU link has returned to a normal status.