Communication Terminal Upload Traffic Congestion Control
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Solution Overview
Problem
Communication terminals face upload traffic congestion due to limited upload data rates, leading to transmission delays and buffer overflows, with existing flow control mechanisms being overly restrictive and impacting all services, including critical voice over IP calls.
Innovation Solution
A communication terminal with a detector to identify congestion and a classifier to assign service classes for traffic reduction, allowing for a more gradual and service-based flow control, reducing traffic for non-essential services while maintaining critical communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flow control mechanisms are applied to handle upload traffic congestion, then buffer overflow is prevented, but all services including critical voice over IP calls are impacted
Solution Approach 1:
The patent segments upload traffic into different service classes (e.g., voice over IP, data services) based on service type and priority. This segmentation allows the system to apply flow control selectively to non-critical services while maintaining uninterrupted service for critical voice communications, thereby preventing buffer overflow without impacting all services uniformly.
Solution Approach 2:
The patent implements local quality by assigning different quality characteristics and handling priorities to different service classes. Critical services like voice over IP receive higher priority and are exempt from flow control restrictions, while non-critical data services are subject to traffic reduction. This differentiated local quality ensures reliable buffer overflow prevention for essential services while maintaining operational ease for critical communications.
2Reliability
If upload data traffic is reduced to prevent congestion, then buffer overflow is avoided, but transmission delay increases for all services
Solution Approach 1:
The system segments traffic into priority-based service classes, allowing critical services to maintain normal transmission rates while non-critical services experience traffic reduction. This segmentation prevents the transmission delay from affecting all services uniformly, thereby avoiding excessive delay for voice over IP and other time-sensitive communications while still preventing buffer overflow through selective traffic management.
Solution Approach 2:
The patent implements dynamic priority management where service class priorities are adjusted based on current network conditions and buffer status. When congestion is detected, the system dynamically reduces priority for non-critical services while maintaining high priority for critical communications. This dynamic approach prevents buffer overflow without causing persistent transmission delay for essential services, as their priority is restored or maintained based on real-time conditions.
3Productivity
If existing flow control mechanisms are used, then upload traffic congestion is managed, but the control is overly restrictive and impacts critical services
Solution Approach 1:
The patent applies segmentation by dividing upload traffic into multiple service classes with different congestion control characteristics. This allows the system to manage congestion effectively for non-critical services while adapting the control behavior for critical services, thereby achieving productive congestion management without overly restrictive control that would impact voice over IP and other time-sensitive communications.
Solution Approach 2:
The system implements dynamic adaptability by adjusting flow control parameters based on service class, buffer status, and network conditions. Rather than applying uniform restrictive control, the system dynamically adapts its behavior to maintain productive congestion management for data services while preserving service differentiation for critical communications, enabling versatile handling of diverse traffic types under congestion conditions.
Data Source
AI summary
A communication terminal is provided including a detector configured to detect an upload data traffic congestion situation in the communication terminal, a classifier configured to assign, in response to the detection of an upload data traffic congestion situation, a communication service class for which upload data traffic is to be reduced and a controller configured to initiate a reduction of upload data traffic belonging to a communication service of the assigned communication service class.