A New Approach for Supporting QoS in Mac Layer over MANETs

QoS Control in MANETs — A State‐of‐the‐Art Perspective

“…In addition, (Nasir and Albalt 2008) proposed an improvement to the IEEE 802.11 binary exponential backoff algorithm, labeled History-based Adaptive Backoff (HBAB), and was heralded to better manage the contention window when collisions occurred and more accurately predict the network status. Second, (Brahma et al 2005) proposed QoS support using the MAC buffer management in lieu of access priority differential with load balancing providing service differentiation. To provide load balancing, a new IEEE 802.11 MAC message was designed containing HELP (if node is congested), OK (if node has available bandwidth), and NOTIFY (congested node chooses ‗best' node).…”

“…First, a preponderance of these papers (70%) related primarily or exclusively to QoS routing. The authors proposed both improvements to already existing routing algorithms (Badis and Al Alga 2004), (Brahma et al 2005), (Chen and Heinzelman 2005), (Haghighat and Khoshrodi 2007), (Helweh-Hannan, 2006), (Perkins et al 2004), and (Zhang and Gulliver 2005) as well as the development of new protocols (Kone and Nandi 2006), (Medidi and Vik 2004), and (Ziane and Mellouk 2007). Second, a number of papers were devoted to cross-layer approaches (Abdullah and Parish 2007), (Canales et al 2006), (Crawley et al 1998), and(deRenesse et al 2007) which encompass multiple protocol layers relying on information exchanges, e.g., from the data link (for the MAC sublayer) and networking (IP routing) layers.…”