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2009
IEEE

Performance of VoIP with DCCP for Satellite Links

8 years 3 months ago
Performance of VoIP with DCCP for Satellite Links
Abstract--We present experimental results for the performance of selected voice codecs using the Datagram Congestion Control Protocol (DCCP) with TCP-Friendly Rate Control (TFRC) congestion control mechanism over a satellite link. We evaluate the performance of both constant and variable data rate speech codecs (G.729, G.711 and Speex) for a number of simultaneous calls, using the ITU E-model and identify problem areas and potential for improvement. Our experiments are done on a commercial satellite service using a data stream generated by a VoIP application, configured with selected voice codecs and using the DCCP/CCID4 Linux implementation. We analyse the sources of packet losses which are a main contributor to reduced voice quality when using CCID4 and additionally analyse the effect of jitter which is one of the crucial parameters contributing to VoIP quality and has, to the best of our knowledge, not been considered previously in the published DCCP performance results. We propose ...
Golam Sarwar, Roksana Boreli, Emmanuel Lochin
Added 18 Feb 2011
Updated 18 Feb 2011
Type Journal
Year 2009
Where ICC
Authors Golam Sarwar, Roksana Boreli, Emmanuel Lochin
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