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Airborne backbone networks are useful in tactical applications to interconnect sub-networks. A major challenge in such networks, normally comprising large numbers of highly mobile nodes, is the design of the medium access control (MAC) and routing protocols. We propose integration of MAC and routing functions, which use the attributes of a clustering scheme that addresses scalability. The reactive...
The MEOW model-based design of an energy-optimized protocol stack addresses energy-aware functional design, optimization, simulation and code generation for WSNs. The goal is to satisfy functional and performance requirements, while maximizing battery lifetime. MEOW has been developed using the Matlab and Stateflow tools, which can be used in a model-based design environment to provide opportunities...
In the last few years, demand for high-speed internet access and multimedia service has increased greatly. The IEEE 802.16 standard defines the wireless broadband access technology called WiMAX (Worldwide Interoperability Microwave Access) aims to provide broadband wireless last-mile access, easy deployment, high speed data rate for large spanning area. In this paper, we propose an Energy/bit Minimization...
A key feature in the design of any MAC protocol is the throughput it can provide. In wireless networks, the channel of a user is not fixed but varies randomly. Thus, in order to maximize the throughput of the MAC protocol at any given time, only users with large channel gains should be allowed to transmit. In this paper, a compressive sensing based opportunistic protocol for exploiting multiuser diversity...
We examine threshold-based transmission strategies for distributed opportunistic medium access, and specifically address the problem of setting the threshold values so as to optimize the aggregate throughput utility of the various users. In the case of weighted logarithmic throughput utility (proportional fairness) we provide an adaptive algorithm for finding the optimal threshold values in a distributed...
In the last few years, demand for high speed internet access service has increased greatly so the IEEE 802.16 working group on broadband wireless access (BWA) is developing the worldwide interoperability for microwave access (WiMAX) standard for wireless metropolitan area networks (MANs) which aims to provide broadband wireless last mile access, easy deployment, and high speed data rate for large...
The WiMAX mesh networks based on IEEE 802.16 standard is a key topology for the next generation wireless networking. However, interferences from transmission of the neighboring nodes within the mesh networks are inevitable. Cross-layer design for tree-type routing and level-based centralized scheduling is proposed as the optimization strategy. The cross-layer design here is relying on the routing...
The IEEE 802.16 standard defines WiMax (worldwide interoperability for microwave access) mesh network, using the base station (BS) as a coordinator for centralized scheduling. This paper proposes a centralized scheduling algorithm by constructing routing tree in WiMax mesh network, which introduces the cross-layer concept between the media access controller (MAC) and the network layers. The interference,...
Channel dependant scheduling schemes for high speed downlink packet access (HSDPA) system such as Max CIR and proportional fairness (PF) have been proven to provide a significant throughput gain by exploiting the channel fluctuations of the users. However, their inability to ensure a fair distribution of the radio resources among the mobile users has been a major concern. In this paper, we propose...
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