We propose the integrated model of a single packetized variable bit rate (VBR) teletraffic source for cellular next generation (NG) All-IP networks. The proposed model integrates two parts: the mobility model and the teletraffic model. The mobility model captures mobility behavior of a single user and is modeled by a Markov chain with finite state space. The teletraffic model captures teletraff...

Article history: Received 12 September 2008 Received in revised form 14 July 2009 Accepted 15 August 2009 Available online 4 September 2009 This paper examines international capital mobility by estimating intertemporal current account models for nine major industrialized countries. To account for the large fluctuations of oil prices (the terms-of-trade) and their effects on the current account,...

This paper describes a virtual prototype of a PEMFC based Hybrid Electrical Military Vehicle developed within the Virtual Test Bed (VTB) environment. The VTB is software for modeling, simulation, and virtual prototyping of multi-disciplinary systems. Several of the main models used in the vehicle system especially the fuel cell model are described, and then a system-level model of a High Mobili...

Performance evaluations of routing protocols for wireless adhoc networks were largely done using simulation tools. Few factors need to be controlled to have useful simulation results are transmission power, power consumption, mobility model, traffic etc. since performance of an ad hoc network protocol can vary significantly with different mobility models and also under same mobility models with...

Traditionally, ad hoc networks have been viewed as a connected graph over which end-to-end routing paths had to be established. Mobility was considered a necessary evil that invalidates paths and needs to be overcome in an intelligent way to allow for seamless communication between nodes. However, it has recently been recognized that mobility can be turned into a useful ally, by making nodes ca...

The intrinsic factor that drives the human movement remains unclear for decades. While our observations from intra-urban and inter-urban trips both demonstrate a universal law in human mobility. Be specific, the probability from one location to another is inversely proportional to the number of population living in locations which are closer than the destination. A simple rank-based model is th...

BACKGROUND The mobility of older individuals has often been only partially assessed, without considering all important aspects such as potential (available) versus effective (used) mobilities and the physical and psychosocial factors that modulate them. This study proposes a new model for evaluating mobility that considers all important aspects, applied here to lower-limb amputees with vascular...

Mobility modelling is a critical element in the development, dimensioning and deployment of any cellular network infrastructure. As subscribers generally move in a deterministic manner, the mobility model used should reflect these inherent user patterns. Throughout a typical day, due to work/recreational activities, users are attracted to different areas of a cellular network, i.e. outlining ce...

A Mobile Ad hoc Network (MANET) is a collection of wireless mobile nodes forming a selfconfiguring network without using any existing infrastructure. Since MANETs are not currently deployed on a large scale, research in this area is mostly simulation based. Among other simulation parameters, the mobility model plays a very important role in determining the protocol performance in MANET. Thus, i...