Link Adaptations and Protocol Design for Wireless Ad Hoc Networks
Submission deadline 05/24/200505/24/2006
Speaker(s) : Marwan KRUNZ - University of ArizonaDespite extensive research, mobile ad hoc networks (MANETs) are still far from achieving their potential capacity. One main reason is that such networks are required to operate in a distributed fashion, utilizing only localized information for their operation and control. Adaptive medium access control (MAC) is a key to improving the performance of such networks. In this talk, I will focus on transmission power adaptation, which has great potential to increase the spatial throughput of a MANET and/or reduce its overall energy consumption. I will present several power-controlled MAC protocols that operate under different radio capabilities. First, I will present MAC designs that are aimed at omni-directional transmissions. The role of game theory in one of these designs will be highlighted. I will then consider MANETs with beam-forming (directional) capabilities and will introduce a power-controlled MAC protocol called LCAP for such networks. LCAP ameliorates several of the medium access problems that are caused by directional transmission/reception. It provides a mechanism for selecting the appropriate tradeoff between throughput and energy consumption. Next, I will present joint routing/MAC power-controlled designs for MANETs with MIMO (multi-input, multiple-output) capabilities and for MANETs that are equipped with cognitive radios. If time permits, I will highlight other research projects of the networking group at the UA.