Distributed Antenna System Central Controller Scheduling
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Solution Overview
Problem
Current communication systems lack an effective design for distributed antennas to achieve high performance, particularly in next-generation mobile communication systems like IMT-Advanced, which require improved throughput, spectrum utilization, and cell edge transmission efficiency.
Innovation Solution
A distributed antenna system comprising a central controller and radio transceiver units that measure and process user equipment pilot reference signal power information to select and distribute data for downlink transmission, utilizing channel status information to optimize data streams and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If distributed antennas are deployed to improve throughput and spectrum efficiency, then system capacity and cell edge transmission efficiency are improved, but device complexity and system design difficulty increase due to lack of established design solutions
Solution Approach 1:
The system segments the base station functionality into a central controller and multiple distributed radio transceiver units. Each radio transceiver unit operates as an independent segment with local measurement and transmission capabilities, while the central controller coordinates overall system operation. This segmentation enables distributed antenna deployment to improve throughput while managing complexity through modular architecture.
Solution Approach 2:
The central controller acts as an intermediary between user equipment and distributed radio transceiver units. It receives measurement reports from radio transceiver units, makes scheduling decisions, and coordinates data transmission. This intermediary structure provides established design solutions for managing the complexity of distributed antenna systems while enabling improved system productivity.
2Productivity
If multiple radio transceiver units are selected for data transmission, then spectrum efficiency and capacity are improved, but interference management becomes more difficult
Solution Approach 1:
The system implements feedback mechanisms where radio transceiver units measure pilot reference signal power and report channel status information to the central controller. The central controller uses this feedback to make informed scheduling decisions about which radio transceiver units should transmit data to which user equipment. This feedback-based coordination improves spectrum efficiency while managing interference through centralized control.
Solution Approach 2:
The system dynamically changes transmission parameters including selecting different radio transceiver units for data transmission based on measured channel conditions. The central controller adjusts which radio transceiver units are activated for transmission, modifying the system's operational parameters to optimize spectrum efficiency while minimizing interference between concurrent transmissions.
Data Source
AI summary
A data transmission method and central controller for a distributed antenna system and a distributed antenna system. The system includes a central controller and multiple wireless transceiver units. The method includes that wireless transceiver units measure the power of the pilot reference signals received from user terminals and forward this power rate to a central controller; the central controller selects a set of wireless transceiver units for transmitting data to the terminal according to the pilot reference signal power rates of the terminals forwarded by the multiple wireless transceiver units; the central controller performs data processing according to said set of wireless transceiver units; the central controller distributes the processed data to the wireless transceiver units in said set of wireless transceiver units, and the wireless transceiver units in said set perform the downlink data transmission.