Traffic Balancing in Heterogeneous Networks with Active DAS
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Solution Overview
Problem
Distributed Antenna Systems (DAS) experience processing delays due to RF signal conversion to digital signals, impacting delay-sensitive applications, and increased traffic loads exacerbate these delays, making existing systems less efficient compared to macro networks.
Innovation Solution
Implement a method to redirect wireless devices to access nodes with lower latency based on application priority and quality of service indicators, comparing latency conditions between DAS and macro cell access nodes to optimize traffic balancing and reduce processing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If RF signals are converted to digital signals in DAS, then signal processing capability is improved, but processing delay increases
Solution Approach 1:
The patent implements dynamic traffic steering that adapts routing decisions based on real-time application requirements and network conditions. The system dynamically switches between DAS and macro cell access depending on whether the application is delay-sensitive or delay-tolerant, making the network behavior flexible rather than static.
Solution Approach 2:
The patent segments traffic into different categories based on application types (delay-sensitive vs. delay-tolerant). By dividing traffic flows into distinct segments with different routing requirements, the system can optimize each segment's path independently - sending delay-sensitive traffic through the macro cell and delay-tolerant traffic through the DAS.
2Productivity
If traffic load increases in DAS, then network capacity utilization is improved, but processing delay increases
Solution Approach 1:
The patent employs feedback mechanisms where the network continuously monitors application types, traffic conditions, and performance metrics. Based on this feedback, the system adjusts routing decisions in real-time, steering delay-sensitive traffic away from congested DAS paths and toward macro cell access when necessary.
Solution Approach 2:
The patent changes the routing parameter (access node selection) based on traffic load conditions and application requirements. When DAS becomes congested or when delay-sensitive applications are detected, the system changes the routing parameter to direct traffic through the macro cell instead, optimizing overall network performance.
3Area of stationary object
If wireless devices are directed to DAS, then indoor coverage is improved, but latency increases for delay-sensitive applications
Solution Approach 1:
The patent applies local quality by providing different service qualities through different access nodes based on location and application requirements. In indoor areas with DAS coverage, delay-tolerant applications receive service through DAS while delay-sensitive applications are steered to macro cell access, ensuring each location provides the appropriate service quality for its specific needs.
Data Source
AI summary
Methods and systems for balancing traffic in a wireless network by controlling DAS and an access node of a macro nodes to direct a wireless device to the system with the lowest latency, according to a priority of an application of a wireless device. The method includes receiving an indicator of an application type, or a bearer type, from a wireless device, determining a processing delay of a distributed antenna system, determining a priority of the received signal, and in response to the processing delay of the distributed antenna system meeting a first criteria and a quality of service indicator meeting a second criteria, directing the wireless device to an access node.