Congestion Control using FEC for Conversational Multimedia Communication

In this paper, we propose a new rate control algorithm for conversational multimedia flows. In our approach, along with Real-time Transport Protocol (RTP) media packets, we propose sending redundant packets to probe for available bandwidth. These redundant packets are Forward Error Correction (FEC)...

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Bibliographic Details
Published in:arXiv.org 2013-10
Main Authors: Nagy, Marcin, Singh, Varun, Ott, Joerg, Eggert, Lars
Format: Article
Language:English
Subjects:
Algorithms
Coding
Computer simulation
Congestion
Control algorithms
Control theory
Error correction
Multimedia
Multimedia communications
Packets (communication)
Redundancy
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Summary:In this paper, we propose a new rate control algorithm for conversational multimedia flows. In our approach, along with Real-time Transport Protocol (RTP) media packets, we propose sending redundant packets to probe for available bandwidth. These redundant packets are Forward Error Correction (FEC) encoded RTP packets. A straightforward interpretation is that if no losses occur, the sender can increase the sending rate to include the FEC bit rate, and in the case of losses due to congestion the redundant packets help in recovering the lost packets. We also show that by varying the FEC bit rate, the sender is able to conservatively or aggressively probe for available bandwidth. We evaluate our FEC-based Rate Adaptation (FBRA) algorithm in a network simulator and in the real-world and compare it to other congestion control algorithms.
ISSN:2331-8422
DOI:10.48550/arxiv.1310.1582