Adaptive Distributed Antenna System for Flexible Radio Resource Coordination
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Solution Overview
Problem
Current Distributed Antenna Systems (DAS) face limitations when applied to modern radio techniques, requiring improved flexibility and re-configurability, as well as enhanced interaction among multiple transmitting/receiving nodes to support increasing radio capacity and efficiency.
Innovation Solution
A method and system that dynamically manage radio resources using a ring configuration of distributed antennas connected to central units, allowing for adaptive antenna systems with precoding and advanced signal processing algorithms to optimize performance metrics like SINR, and enabling coordinated transmission across multiple remote units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional DAS architecture with centralized signal processing is used, then system complexity is reduced and ease of operation is improved, but flexibility and re-configurability are limited
Solution Approach 1:
The patent segments the base station functionality into multiple Remote Units (RUs) distributed across different locations, each capable of independent signal processing. This segmentation enables flexible reconfiguration of the network by adding, removing, or repositioning RUs without redesigning the entire system, while maintaining manageable complexity through modular architecture
Solution Approach 2:
The patent implements dynamic resource allocation and coordination mechanisms where the Central Unit (CU) can dynamically control and reconfigure multiple RUs in real-time based on traffic demands and channel conditions. This dynamic control enables the system to adapt to changing requirements while maintaining centralized management to control complexity
2Area of stationary object
If multiple radio base stations are deployed to expand coverage, then coverage area is improved, but coordination complexity and handover management become more difficult
Solution Approach 1:
The patent merges multiple distributed Remote Units into a coordinated MultiPoint transmission system under a single Central Unit. This merging approach allows the system to cover a large area through multiple RUs while the CU provides unified resource management and coordination, eliminating the need for complex inter-base-station handover protocols by treating all RUs as parts of one logical base station
3Productivity
If fixed network architecture is used, then system stability is improved, but ability to support increasing radio capacity and modern radio techniques is limited
Solution Approach 1:
The patent implements a dynamic network architecture where the Central Unit can dynamically allocate resources, adjust beamforming weights, and reconfigure Remote Units based on real-time traffic demands and channel conditions. This dynamic capability enables the system to support increasing radio capacity and modern techniques like Coordinated MultiPoint transmission while maintaining stable operation through automated control mechanisms
Data Source
AI summary
A method of arranging exchange of signals between user terminals in a cellular communication system and at least one base station including a central unit and a plurality of remote units. The method includes exchanging signals with at least one user terminal simultaneously via at least two remote units by applying at the at least two remote units, separate distributing weighting functions to the signals exchanged with the at least one user terminal.