IngentaConnect RObust Header Compression (ROHC) Performance for Multimedia Trans...

Authors: Fitzek, Frank¹; Rein, Stephan²; Seeling, Patrick³; Reisslein, Martin⁴

Source: Wireless Personal Communications, Volume 32, Number 1, January 2005 , pp. 23-41(19)

Publisher: Springer

Abstract:

RObust Header Compression (ROHC) has recently been proposed to reduce the large protocol header overhead when transmitting voice and other continuous media over IP based protocol stacks in wireless networks. In this paper we evaluate the real-time transmission of GSM encoded voice and H.26L encoded video with ROHC over a wireless link. For the voice transmission we examine the impact of ROHC on the consumed bandwidth, the voice quality, and the delay jitter in the voice signal. We find that for a wide range of error probabilities on the wireless link, ROHC roughly cuts the bandwidth required for the transmission of GSM encoded voice in half. In addition, ROHC improves the voice quality compared to transmissions without ROHC, especially for large bit error probabilities on the wireless link. The improvement reaches 0.26 on the 5-point Mean Opinion Score for a bit error probability of 10^-3. For the video transmission we examine the impact of ROHC on the consumed bandwidth. We find that the bandwidth savings with ROHC depend on the quantization scale used for the video encoding and the video content and ranges between 5–40% for typical scenarios.

Keywords: bandwidth savings; Internet Protocol; robust header compression; subjective voice quality; video transmission; wireless links

Document Type: Research article

DOI: 10.1007/s11277-005-7733-2

Affiliations: 1: Aalborg University, Denmark, Email: ff@kom.aau.dk 2: Electronic Measurement and Diagnostics group, Technical University, Berlin, Germany, Email: stephan.rein@tu-berlin.de 3: Department of Electrical Engineering, Arizona State University, Goldwater Center MC 5706, Tempe, AZ, 85287-5706, Email: patrick.seeling@asu.edu 4: Department of Electrical Engineering, Arizona State University, Goldwater Center MC 5706, Tempe, AZ, 85287-5706, Email: reisslein@asu.edu

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