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In multi-channel wireless networks, effective scheduling algorithms are indispensable for fully harvesting the benefit of multiple channels. Since scheduling decisions need to be made quickly under time-varying wireless channels and traffic dynamics, low-complexity algorithms are especially appealing. In this paper, we study the problem of scheduling in multichannel wireless local area networks. We...
While analysis and simulation experiments are essential in exploring fundamental properties of various technologies and protocols, experiments with real, or at least prototype, systems arc necessary to move mobile ad hoc networks (MANETs) from the domain of a research topic to real applications. A major obstacle to the collection of reliable performance results in a MANET test bed is poor repeatability...
Despite the fact that it is not optimal, the availability of low-cost, commodity network interface cards (NICs) has made the IEEE 802.11 medium access control (MAC) protocol the de facto MAC standard for wireless mobile ad-hoc networks. The IEEE 802.11 MAC protocol is designed to have stations share a single channel in a given network. However, many of the IEEE 802.11 physical (PHY) layer specifications...
This paper shares our experiences developing a service discovery dissemination mechanism for pervasive computing environments. We explore the problems encountered when designing a solution for IEEE 802.11b ad hoc networks, including the performance of multicast and unicast delivery. We show and discuss results from both high and low traffic scenarios, with nodes in close proximity. We also discuss...
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