Reliable transmission of stream transported media in wireless real time communications

Reliable transmission of stream transported media in wireless real time communications The Real Time Protocol (RTP) provides a well established mechanism for media transmission that typically relies on the packetization on top of the User Datagram Protocol. One serious problem of datagram based traffic, however, is that highly restrictive firewalls prevent their traversal making Real Time Communication not possible. The alternative of transporting RTP on top of the Transport Control Protocol , while reliable, it is not effective as ever-present network packet loss introduces latency that degrades media quality and negatively affects user experience. In this paper, a scheme that relies on multiplexing media frames over multiple streams is proposed. This mechanism is analyzed through a novel analytical model that links application and network packet loss in the context of wireless multiple stream transport. The model is later validated by means of an experimental framework that relying on state of the art speech codecs and quality metrics quantifies its advantages. Keywords RTC  TCP  Multiplexing  Firewall traversal  Packet loss 1 Introduction network layers; an outer or external one and an inner or internal one as shown in Fig. 1. Note that the outer net- Media transmission in the context of RTC is based on RTP work layer, http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Wireless Networks Springer Journals

Reliable transmission of stream transported media in wireless real time communications

Wireless Networks , Volume OnlineFirst – May 28, 2018

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Engineering; Communications Engineering, Networks; Computer Communication Networks; Electrical Engineering; IT in Business
ISSN
1022-0038
eISSN
1572-8196
D.O.I.
10.1007/s11276-018-1767-3
Publisher site
See Article on Publisher Site

Abstract

The Real Time Protocol (RTP) provides a well established mechanism for media transmission that typically relies on the packetization on top of the User Datagram Protocol. One serious problem of datagram based traffic, however, is that highly restrictive firewalls prevent their traversal making Real Time Communication not possible. The alternative of transporting RTP on top of the Transport Control Protocol , while reliable, it is not effective as ever-present network packet loss introduces latency that degrades media quality and negatively affects user experience. In this paper, a scheme that relies on multiplexing media frames over multiple streams is proposed. This mechanism is analyzed through a novel analytical model that links application and network packet loss in the context of wireless multiple stream transport. The model is later validated by means of an experimental framework that relying on state of the art speech codecs and quality metrics quantifies its advantages. Keywords RTC  TCP  Multiplexing  Firewall traversal  Packet loss 1 Introduction network layers; an outer or external one and an inner or internal one as shown in Fig. 1. Note that the outer net- Media transmission in the context of RTC is based on RTP work layer,

Journal

Wireless NetworksSpringer Journals

Published: May 28, 2018

References

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