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IEEE 802.11 specifies a Power Saving Mode (PSM) in order to save the energy consumptions of mobile hosts. Following the standard of PSM, a number of studies [1–4] further discussed the wakeup/sleep scheduling of beacon intervals based on Quorum systems so that any communication pair of hosts has common awake intervals for data exchange. However, most of them did not take into consideration the fact...
Smart antenna (or Multi-beam antenna) systems can support simultaneous transmissions (or receptions) of multiple packets on different beams using the same channel. However, the network performance highly depends on the transmission scheduling. Based on the cluster topology, this paper aims at developing transmission scheduling approaches with smart antenna systems for maximizing the network throughput...
In this paper, an energy efficient MAC protocol based on the finite projective plane (FPP) theory is proposed. Our protocol introduces an adaptive energy-efficient duty cycle for the sensor nodes to reduce the idle listening problem. By assigning each node with an FPP-set, we propose to decrease wake-up time and to determine the sleep or wake-up schedules based on the existing number of neighbors...
The IEEE 802.16j draft proposes a multi-hop relay network architecture that introduces the new network element of relay station aimed at increasing the network throughput or coverage. The deployment of the relay stations is one of the most important issues that determines the network throughput. Given a base station, k relay stations, and a deployed region that can be fully covered by the BS, this...
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