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The internet is often compared to a sea of information, and searching on the internet is like throwing a net on the surface of the ocean, the search will only include results from the surface of the ocean leaving the depth untouched, naming it the deep web. The deep web includes, among other things, the un-indexed audio contents present today, where the search is based on descriptors accompanying...
One of the main reasons for TCP's (Transport Control Protocol) degraded performance in 802.11 wireless networks is the TCP's interpretation that the packet loss is caused by network congestion. However, in wireless networks packet loss occurs mostly due to high bit error rate, packet corruption, and link failure. TCP performance in wired/wireless networks may be substantially improved if the causes...
To extend and improve the cell coverage, an efficient solution is to place several relay antennas in the cell. Several protocols for relay selection were proposed in the past years. However, the asynchronism between the received signals due to the different locations of the relays was not addressed. In this paper, we propose to select the relays based on several important criteria. The SNR (Signal...
A scenario to design a Triple Mode FFT is addressed. Based on a Dual Mode FFT structure, we present a methodology to reach a triple mode FFT operator (TMFFT) able to operate over three different fields: complex number domain ℂ, Galois Fields GF(Ft) and GF(2m). We propose a reconfigurable Triple mode Multiplier that constitutes the core of the Butterfly-based FFT. A scalable and flexible unit for the...
Recently, a distributed architecture for base stations was proposed. In this new configuration, the base station is separated into two parts: the radio frequency part near the antenna and the baseband processing unit. The interface connection between them is ensured by an optical fiber. In this paper, we present the ongoing works on standardization of the optical interface and the proposed solutions...
In this paper, we investigate a cross layer design for routing in mobile ad hoc networks. The goal is to improve the performance of the existing Ad-hoc On Demand Distance Vector (AODV) routing protocol. The design allows the physical layer sharing the received signal strength (RSS), and the medium access control (MAC) layer sharing the remaining energy, as well as the remaining queue length information...
Clustering has been proven to be a promising approach for mimicking the operation of the fixed infrastructure and managing the resources in multi-hop networks. In order to achieve good performance, the formation and maintenance procedure of clusters should operate with minimum overhead, allowing mobile nodes to join and leave without perturbing the membership of the cluster and preserving current...
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