RAPID: A Reliable Protocol for Improving Delay

Sanjeev Mehrotra, Jin Li, and Cheng Huang


Recently, there has been a dramatic increase in interactive cloud based

software applications (e.g. working on remote machines,

online games, interactive

websites such as financial, web search)

and other soft real-time applications (traffic within data center).

Compared to classical real-time media applications

(VoIP/conferencing) and non real-time file delivery,

these interactive software applications have unique characteristics

as they are delay sensitive yet demand in order and reliable data delivery.

Therefore existing protocols for delivery of lossless data (such

as TCP) and other delivery protocols using UDP do not

work well.

In this demo, we show substantially improved performance for such

traffic by using a transport protocol built on top of UDP which uses

intelligent adaptive

forward error correction (FEC) and improved congestion control (rate control).

The transport protocol is made lossless by using a hybrid FEC/ARQ strategy.

The congestion control technique improves the delay

performance by preventing

congestion induced loss and minimizing queuing delay while still

fully utilizing network capacity and maintaining

fairness across flows.

In this demo, we present RAPID (a bf Relibf Able transport

bf Protocol for bf Improving end-to-end bf Delay) and

show its effectiveness in improving

the performance of interactive client-server applications.


Publication typeInproceedings
Published inACM Multimedia
PublisherAssociation for Computing Machinery, Inc.
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