Title: Application-level QoS: improving video conferencing quality through sending the best packet next

Authors: I.A. McDonald, R. Nelson

Addresses: School of Computing and Mathematical Sciences, University of Waikato, Hamilton, New Zealand. ' School of Computing and Mathematical Sciences, University of Waikato, Hamilton, New Zealand

Abstract: In a traditional network stack, data is transmitted in the order that it is received. An algorithm is proposed where priority of packets and expiry times is used by the transport layer to reorder or discard packets to optimise the use of available bandwidth. This scheme is implemented and compared to unmodified Datagram Congestion Control Protocol (DCCP) using traffic modelled on video conferencing software. The results show improvement can be made during periods of congestion – more audio packets arrive on time and in many cases video packet arrival rates also increase.

Keywords: video conferencing; DCCP; datagram congestion control protocol; API; multimedia; quality of service; QoS; best packet next; audio packets; video packets.

DOI: 10.1504/IJIPT.2009.024167

International Journal of Internet Protocol Technology, 2009 Vol.4 No.1, pp.24 - 31

Available online: 27 Mar 2009 *

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