Mobile WiMAX video quality and transmission efficiency

Author

Sgardoni, Victoria ; Halls, David ; Bokhari, Syed Mohsin Matloob ; Bull, David ; Nix, Andrew

Author_Institution

Centre for Commun. Res., Univ. of Bristol, Bristol, UK

fYear

2011

fDate

11-14 Sept. 2011

Firstpage

1077

Lastpage

1082

Abstract

This paper explores rules and defines cross layer parameters that enhance the received video quality per unit bandwidth while observing strict video QoS for unicast video transmission over mobile WiMAX. Channel capacity and goodput are estimated using a detailed MAC/PHY simulator. The simulator supports link adaptation of the PHY layer Modulation and Coding Scheme (MCS) alongside MAC layer Automatic Repeat Request (ARQ). A new performance indicator, PSNR per Hz, is defined to capture the video PSNR attained for a given effective bandwidth. For the 3GPP urban micro channel, MCS and MAC layer block lifetime are jointly determined as a function of average channel SNR in order to enhance video PSNR and goodput. At low SNR higher level QAM is inefficient (as a result of excessive MAC layer ARQ or high packet error rate) for video transfer. Results show that video efficiency improves for block lifetimes up to 100ms, since the greater use of ARQ enables more spectrally efficient MCS modes to be applied.

Keywords

3G mobile communication; WiMax; automatic repeat request; channel capacity; channel estimation; encoding; quadrature amplitude modulation; quality of service; video communication; 3GPP urban micro channel; ARQ; MAC/PHY simulator; PHY layer coding scheme; PHY layer modulation; PSNR; QAM; automatic repeat request; channel capacity estimation; cross layer parameters; goodput estimation; link adaptation; mobile WiMAX video quality; transmission efficiency; unicast video transmission; video QoS; video transfer; Automatic repeat request; Bandwidth; Mobile communication; PSNR; Streaming media; WiMAX; ARQ; Mobile WiMAX; PSNR; bandwidth efficiency; goodput; link adaptation; video streaming;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on

Conference_Location

Toronto, ON

ISSN

pending

Print_ISBN

978-1-4577-1346-0

Electronic_ISBN

pending

Type

conf

DOI

10.1109/PIMRC.2011.6139662

Filename

6139662