Software-Configurable Distributed Antenna Uplink Noise Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional Distributed Antenna Systems (DAS) face challenges in managing uplink noise and traffic variability, leading to suboptimal system performance and high costs due to the need for multiple uplink antennas and fixed configurations that are difficult to reconfigure as traffic conditions change.
Innovation Solution
A dynamically reconfigurable DAS architecture utilizing Software Configurable Radio subsystems in Digital Access Units (DAUs) and Remote Radio Head Units (RRUs) to route and switch uplink RF signals, reducing noise and enhancing system performance without requiring multiple uplink antennas, and allowing for field reconfiguration and remote monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple remote antenna units are deployed in a DAS to increase coverage, then system coverage area is improved, but uplink noise increases
Solution Approach 1:
The patent segments the uplink signal processing by separating diversity antenna inputs into distinct processing paths within the host unit. Each remote antenna unit's uplink signal is processed independently through its own RF input, allowing selective combining only of desired signals while excluding noise from other antennas, thus maintaining coverage expansion without proportional noise increase
Solution Approach 2:
The host unit acts as an intermediary that receives uplink signals from multiple remote antenna units, processes them through separate RF inputs, and selectively combines only the desired signals. This intermediary processing stage enables coverage expansion while controlling noise by filtering and selectively combining signals before forwarding to the base station
2Stability of the object's composition
If conventional DAS architecture is used with fixed configurations, then system stability is improved, but adaptability to changing traffic conditions deteriorates
Solution Approach 1:
The patent implements dynamic reconfigurability in the DAS architecture where the host unit can dynamically adjust signal routing, combining, and processing parameters based on real-time traffic conditions. The system transitions from fixed configurations to dynamic adaptation while maintaining operational stability through controlled reconfiguration mechanisms
3Reliability
If uplink diversity is implemented with two separate receive antennas, then system performance is improved, but device complexity increases
Solution Approach 1:
The patent merges the functionality of multiple diversity antenna inputs into a unified host unit processing architecture. The host unit consolidates RF inputs, signal processing, and selective combining functions in a single location, reducing distributed complexity while maintaining the performance benefits of uplink diversity through centralized intelligent processing
Data Source
AI summary
A distributed antenna system includes a master unit including a downlink RF input operable to receive an RF input signal from a downlink port of a base station, a first optical port, and a second optical port. The distributed antenna system also includes a first remote unit coupled to the first optical port. The first remote unit comprises a downlink antenna port and a first uplink antenna port and a second remote unit coupled to the second optical port of the master unit. The second remote unit comprises a downlink antenna port and a second uplink antenna port. The master unit is operable to transmit a first RF signal associated with the first RF uplink signal to a first uplink port of the base station and transmit a second RF signal associated with the second RF uplink signal to a second uplink port of the base station.