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Conference Paper
Rethinking Explicit Congestion Notification: A Multilevel Congestion Feedback Perspective
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- Authors
- Inayat Ali, Seungwoo Hong, Pyung-Koo Park, Tae Yeon Kim
- Issue Date
- 2024-04
- Citation
- ACM Network and Operating System Support for Digital Audio and Video (NOSSDAV) 2024, pp.64-70
- Publisher
- ACM
- Language
- English
- Type
- Conference Paper
- Abstract
- Congestion in the network is a persistent issue that is becoming more challenging with the advent of technologies such as metaverse and immersive AR/VR applications. Therefore, we propose Enhanced ECN (EECN), a novel network-assisted congestion feedback protocol that redesigns the legacy ECN. EECN notifies two congestion levels encoded in the existing two ECN bits, unlike ECN which delivers only Boolean information about the congestion. Additionally, we propose a congestion control algorithm that leverages this multilevel congestion feedback from the network using EECN. Our proposed EECN feedback mechanism can coexist with the legacy ECN and requires minimal changes in the end hosts. Moreover, the proposed congestion control mechanism reduces packet drops by 74% compared to ECN with TCP New Reno and 96% compared to TCP New Reno without ECN. The marked packets are reduced by 30% compared to ECN. Furthermore, the proposed approach enhances the flow completion time of short-lived network flows.
- KSP Keywords
- Congestion Control Mechanism, Congestion control algorithm, End hosts, Explicit congestion notification, Feedback Mechanism, Network flow, TCP New Reno, flow completion time, packet drop, short-lived