A New Link Adaptation Scheme for IEEE 802.11 WLANs

A Dynamic Link Adaptation for Multimedia Quality-Based Communications in IEEE_802.11 Wireless Networks

“…A logical way to cope with the slow accommodation characteristics of statistics-based feedback methods is to look for methods that use faster feedback, i.e., feedback that quickly provides up-to-date information about the channel status. Such a feedback -the RTT -has been theoretically discussed in (Rebai et al, 2008), but so far, to www.intechopen.com A Dynamic Link Adaptation for Multimedia Quality-Based Communications in IEEE_802.11 Wireless Networks 37 our knowledge, it has not been used in a practical implementation. We use this RTT measurement in the proposed 802.11 radio to enhance multimedia performance, and also to provide feedback information about the channel conditions that the MAC layer requires.…”

“…This feature represents the innovative part of the new control algorithm to adjust the data rate based on the channel capacity. A first integration attempt has been presented in (Rebai et al, 2008) and a rate adaptation design has been proposed. In this chapter, we implement an enhanced mechanism called Modified Adaptive Auto Rate Fallback (MAARF) which aims to predict the medium conditions and minimize the unnecessary loss of data.…”

Multimedia - A Multidisciplinary Approach to Complex Issues

“…A logical way to cope with the slow accommodation characteristics of statistics-based feedback methods is to look for methods that use faster feedback, i.e., feedback that quickly provides up-to-date information about the channel status. Such a feedback -the RTT -has been theoretically discussed in (Rebai et al, 2008), but so far, to our knowledge, it has not been used in a practical implementation. We use this RTT measurement in the proposed 802.11 radio to enhance multimedia performance, and also to provide feedback information about the channel conditions that the MAC layer requires.…”