This paper addresses the issues of designing an infrastructure to support seamless in-building communication at the 60 GHz band. Recently, the 60 GHz band has received much attention due to its 5 GHz of available spectrum. However, the propagation of signals in this band is strongly hindered by attenuation and line-of-sight requirements. The situation gets worse in the in-building environment where signal propagation is obstructed by physical objects such as walls, furniture etc. In this paper, we present a novel Radio over Fiber (RoF) architecture that is cost-effective and is able to deliver high data-rate of the order of gigabits. To ensure a seamless communication environment at the 60 GHz band, we propose the concept of Extended Cells (EC) in order to create sufficient overlap areas. Finally, we illustrate the effectiveness of the proposed architecture by simulating an in-building network at the 60 GHz band employing the RoF and EC concepts.
The kinetics of reactions of OH radical with n-heptane and n-hexane over a temperature range of 240-340K has been investigated using the relative rate combined with discharge flow/mass spectrometry (RR/DF/MS) technique. The rate constant for the reaction of OH radical with n-heptane was measured with both n-octane and n-nonane as references. At 298K, these rate constants were determined to be k 1,octane = (6.68 ± 0.48) × 10 −12 cm 3 molecule −1 s −1 and k 1,nonane = (6.64 ± 1.36) × 10 −12 cm 3 molecule −1 s −1 , respectively, which are in very good agreement with the literature values. The rate constant for reaction of n-hexane with the OH
Abstract-Radio over Fiber (RoF) techniques have been long recognized as the promising solution for indoor networking at millimeter-wave bands. We discuss the possible deployment scenarios of an RoF network for indoor environment. In this paper, we try to find the answer to the question as to which Medium Access Control (MAC) protocol is suitable for an RoF network. To substantiate our claims, performance analysis of two popular MAC protocols employing RoF -IEEE 802.11 representing the distributed control protocol family and ETSI HiperLAN/2 representing the centralized family -is presented. We show that RoF techniques can be applied to both protocols. We also show that the centralized control protocol is an appropriate candidate for RoF networks. This study is expected to contribute to the speedy deployment of RoF for indoor network deployment.
The recent developments in CMOS technology are about opening a new exciting door to affordable 60-GHz radio applications. One promising application area for 60-GHz radio is home networks in which there is an increasing demand for multi-gigabit wireless networking. The research efforts so far have generally focused on utilizing the 60-GHz band for point-to-point communication by addressing its physical aspects like propagation characteristics and channel models. The issues of 60-GHz networking at the system level have not been adequately considered. In this paper, the challenges and the research issues of 60-GHz networking are reviewed from the system-level perspective. We present them in the context of wireless local area networks for future home networks with discussions on some possible solutions for the introduced challenges.
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