FlexPDD: Enabling Proportional Delay Differentiation Service on Programmable Switches

Quality-of-Service (QoS) guarantees are crucial for meeting the diverse performance requirements of applications in packet networks. The Proportional Delay Differentiation (PDD) model offers relative service differentiation based on the delay requirements of different traffic classes. However, imple...

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Bibliographic Details
Published in:IEEE Global Communications Conference (Online) pp. 1912 - 1917
Main Authors: Jiang, Xinyue, Kong, Dezhang, Zhou, Zhengyan, Wang, Di, Chen, Shuangxi, Wu, Chunming
Format: Conference Proceeding
Language:English
Published: IEEE 08.12.2024
Subjects:
Adaptation models
Control systems
Delays
Faces
Global communication
Hardware
packet scheduling algorithms
programmable switching ASICs
QoS
Quality of service
Scheduling
Switches
ISSN:2576-6813
Online Access:Get full text
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Summary:Quality-of-Service (QoS) guarantees are crucial for meeting the diverse performance requirements of applications in packet networks. The Proportional Delay Differentiation (PDD) model offers relative service differentiation based on the delay requirements of different traffic classes. However, implementing PDD on current hardware switches faces challenges due to the lack of inherent queuing behavior description in switch ASICs. This paper introduces FlexPDD, a dynamic and adaptive packet prioritization mechanism designed to implement the PDD model on programmable switches. FlexPDD leverages the flexibility of programmable switch to adjust the mapping between packet classes and output queues dynamically, ensuring precise control over delay differentiation. Our implementation of FlexPDD on a Barefoot Tofino switch and an NS3 simulator demonstrates its feasibility and effectiveness. The results indicate that FlexPDD successfully maintains approximate delay differentiation among service classes proportional to their delay weights, highlighting its potential as a practical solution for achieving advanced service differentiation in modern network infrastructures.
ISSN:2576-6813
DOI:10.1109/GLOBECOM52923.2024.10901683