This paper considers the problem of detecting rogue base station in WiMAX/802.16 networks. A rogue base station is an attacker station that duplicates a legitimate base station. The rogue base station puzzles a set of subscribers who try to get service which they believe to be a legitimate base station. It may lead to disturbance in service. The strategy of attack depends on the type of network...

In cellular networks, blocking occurs when a base station has no free channel to allocate to a mobile user. One distinguishes between two kinds of blocking, the rst is called new call blocking and refers to blocking of new calls, the second is called handoo blocking and refers to blocking of ongoing calls due to the mobility of the users. In this paper, we rst provide explicit analytic expressi...

Energy efficiency is an important issue for mobile computers since they must rely on their batteries. We present a novel MAC protocol that achieves a good energy efficiency of wireless interface of the mobile and provides support for diverse traffic types and QoS. The scheduler of the base station is responsible to provide the required QoS to connections on the wireless link and to minimise the...

BACKGROUND The power level used by the mobile phone is one of the most important factors determining the intensity of the radiofrequency exposure during a call. Mobile phone calls made in areas where base stations are densely situated (normally urban areas) should theoretically on average use lower output power levels than mobile phone calls made in areas with larger distances between base stat...

The objective of this thesis is to develop methods for a targeted and efficient management of users mobility in heterogeneous mobile networks. This network is characterized by the deployment of different types of cells (macro, micro, pico and/or femto). The massive deployment of small cells (pico and femto) provides a supplementary coverage and capacity to mobile networks, specially in dense ar...

We propose a novel algorithm to efficiently transmit multiple variable-bit-rate (VBR) video streams from a base station to mobile receivers in wide-area wireless networks. The algorithm transmits video streams in bursts to save the energy of mobile devices. A key feature of the new algorithm is that it dynamically controls the buffer levels of mobile devices receiving different video streams ac...

Manipulators with mobile base are gaining momentum in the industry due to improved workspace and flexible adaptability to changes in the product designs. Although there has been research in this field for a considerable time, many issues are still to be resolved viz. obstacle avoidance, redundancy resolution for singularity avoidance, dynamic analysis of combined manipulator and a mobile robot,...

Characterization of mobile data traffic performance is difficult given the inherent complexity and opacity of mobile networks, yet it is increasingly important as emerging wireless standards approach wireline-like latencies. Mobile virtual network operators (MVNOs) increase mobile network topology complexity due to additional infrastructure and network configurations. We collect and analyze tra...

determination of mobile localization with time of arrival (toa) signal is a requirement in cellular mobile communication. in some of the previous methods, localization with non-line-of-sight (nlos) paths can lead to large position error. also for simplicity, in most simulations suppose non stationary actual environments as stationary. this paper proposes (residual test + recursive least square)...

Mobile computers operate in callsta""y changing network ellvirollmellts. It is possible/or a mobile computer to become temporarily "disconnected" from a network IVI,ell it challges base slali01ls or goes Olll ofrange ofa base scotinll. A mobile host //lay also "doze off' 10 preserve bat· rery power. If at the lime it "goe... dOlVn", a mobile computer is involved in a tral/saction process with a...