Per-Flow Control for Wireless Traffic Congestion
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Solution Overview
Problem
Existing aggregated flow control methods in wireless telecommunications systems, such as WCDMA, are ineffective in managing traffic congestion when different bottlenecks occur, leading to inefficient system utilization and potential data loss or high delays.
Innovation Solution
Implementing a per-flow control function that detects and reduces traffic congestion by using a standardized data frame, with a soft congestion detection mechanism that reduces bit rates before system overload, allowing for smoother transitions and optimal resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If aggregated flow control functions are used to monitor and control traffic from RBSs to RNC, then the control function is simpler to implement, but the system cannot effectively handle different bottlenecks and leads to congestion
Solution Approach 1:
The patent segments the aggregated flow control function into multiple per-flow control functions, where each flow receives dedicated monitoring and control. This segmentation enables the system to handle different bottlenecks independently for each flow, improving congestion control effectiveness while maintaining manageable complexity through modular design
Solution Approach 2:
The patent applies local quality by implementing customized control parameters and thresholds for each individual flow based on its specific characteristics and bottleneck conditions. Each flow can have tailored congestion detection thresholds and control strategies, allowing the system to optimize performance for diverse traffic patterns while maintaining overall system manageability
2Ease of operation
If aggregated flow control is used, then the system is easier to manage, but traffic congestion occurs before detection leading to data loss and high delays
Solution Approach 1:
The patent implements preliminary action by continuously monitoring each flow's traffic characteristics and detecting congestion indicators before actual congestion occurs. The per-flow control functions proactively adjust traffic parameters in advance, preventing data loss and high delays while maintaining easy system management through automated early intervention
Solution Approach 2:
The patent employs feedback mechanisms where each per-flow control function continuously monitors its own flow's congestion indicators and adjusts control parameters in real-time. This closed-loop feedback enables early congestion detection and automatic adjustment, reducing detection delays while keeping system management simple through self-regulating flow control
3Device complexity
If aggregated flow control functions are used, then the control mechanism is less complex, but the system utilization becomes inefficient and resources are wasted
Solution Approach 1:
The patent segments the control mechanism into per-flow functions that independently manage each traffic flow, enabling efficient resource allocation and system utilization. Each segmented control function optimizes its flow's resource usage based on current system conditions, improving overall productivity while maintaining manageable complexity through modular architecture
Solution Approach 2:
The patent implements dynamic control where each per-flow control function continuously adapts its parameters based on real-time system conditions and flow characteristics. This dynamic adjustment optimizes system utilization efficiency by allocating resources according to current demand, while the modular per-flow design keeps the control mechanism complexity manageable
Data Source
AI summary
The invention discloses a method for detecting and controlling traffic congestion in a wireless telecommunications system (100, 300, 400) comprising at least a first node (130, 330, 430) such as a Radio Base Station, and at least one second node (110, 310, 410) such as a Radio Network Controller, the system also comprising a Transport Network, TN (120, 320, 420), for conveying traffic between said first and second nodes, in which system (100, 300, 400) the traffic can comprise one or more flow. The method comprises the use of one flow control function (315, 415) per each of said flows, said one flow control function (315, 415) comprising a congestion detection and control function. In addition, the congestion detection function acts to reduce the traffic on said flow before the system becomes congested.