Impact of Precedence Enabled Per Hop Behaviors on TCP Flows

Overview

In the Department of Defense's (DoD) Global Information Grid (GIG) transport network, packet handling must provide preferential transport to high Precedence traffic under all networking conditions, specifically conditions of resource scarcity, e.g., network overload conditions, while simultaneously satisfying packet scheduling required to meet application Quality of Service (QoS) needs. The approach to this duality is to enhance Active Queue Management (AQM) techniques to provide Precedence and Preemption (P&P) capabilities and rely upon standard, well studied QoS Per Hop Behavior (PHB), e.g., Weighted Round Robin, Class-Based Fair Queuing, etc., for handling QoS requirements. In this way, when operating under engineered loads, the well known scheduling algorithms support high quality QoS for applications.