TY - GEN
T1 - A media-oriented transmission mode selection in 802.11 wireless LANs
AU - Manshaei, Mohammad Hossein
AU - Turletti, Thierry
AU - Krunz, Marwan
PY - 2004
Y1 - 2004
N2 - In this paper, we present a media-oriented mechanism for selecting the appropriate transmission mode in 802.11-based wireless LANs (WLANs). The main goal of this mechanism is to improve the effective throughput for transporting loss-tolerant multimedia traffic over a WLAN by taking into account both the application characteristics and the physical channel conditions. In particular, the proposed cross-layer mechanism exploits the robustness of multimedia coding by allowing packets with corrupted payloads reach the receiving application. The sending application specifies its quality of service requirements (data rate, BER tolerance, etc.), and the receiver selects the best transmission mode (transmission rate, modulation scheme, FEC scheme) while taking into account the time-varying channel conditions. We discuss the modifications needed for the control and data-packet headers to implement our approach in the framework of the IEEE 802.11 standards. We use ns2 simulations to contrast our scheme with an existing 802.11 rate selection algorithm. The results indicate that the proposed cross-layer approach achieves up to 5 Mbps increase in throughput and 20-meter increase in the coverage range. Furthermore, by disabling FEC from some of the standard transmission modes, we show that the goodput of loss-tolerant applications can be improved significantly.
AB - In this paper, we present a media-oriented mechanism for selecting the appropriate transmission mode in 802.11-based wireless LANs (WLANs). The main goal of this mechanism is to improve the effective throughput for transporting loss-tolerant multimedia traffic over a WLAN by taking into account both the application characteristics and the physical channel conditions. In particular, the proposed cross-layer mechanism exploits the robustness of multimedia coding by allowing packets with corrupted payloads reach the receiving application. The sending application specifies its quality of service requirements (data rate, BER tolerance, etc.), and the receiver selects the best transmission mode (transmission rate, modulation scheme, FEC scheme) while taking into account the time-varying channel conditions. We discuss the modifications needed for the control and data-packet headers to implement our approach in the framework of the IEEE 802.11 standards. We use ns2 simulations to contrast our scheme with an existing 802.11 rate selection algorithm. The results indicate that the proposed cross-layer approach achieves up to 5 Mbps increase in throughput and 20-meter increase in the coverage range. Furthermore, by disabling FEC from some of the standard transmission modes, we show that the goodput of loss-tolerant applications can be improved significantly.
KW - Cross-Layer interactions
KW - IEEE 802.11
KW - Multirate
KW - Wireless LAN
UR - http://www.scopus.com/inward/record.url?scp=4544260567&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4544260567&partnerID=8YFLogxK
U2 - 10.1109/wcnc.2004.1311364
DO - 10.1109/wcnc.2004.1311364
M3 - Conference contribution
AN - SCOPUS:4544260567
SN - 0780383443
SN - 9780780383449
T3 - 2004 IEEE Wireless Communications and Networking Conference, WCNC 2004
SP - 1228
EP - 1233
BT - 2004 IEEE Wireless Communications and Networking Conference, WCNC 2004
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2004 IEEE Wireless Communications and Networking Conference, WCNC 2004
Y2 - 21 March 2004 through 25 March 2004
ER -