Mobile telephony

About: Mobile telephony is a research topic. Over the lifetime, 38008 publications have been published within this topic receiving 553646 citations.

Telecommunications and economic growth: an empirical analysis of sub-Saharan Africa

Abstract: We examine the effect of mobile cellular phones on economic growth in sub-Saharan Africa where a marked asymmetry is present between land line penetration and mobile telecommunications expansion. This study extends previous research along two important dimensions. First, we allow for the potential endogeneity between economic growth and telecommunications expansion by employing a special linear Generalized Method of Moments (GMM) estimator. Second, we explicitly model for varying degrees of substitutability between mobile cellular and land line telephony, so that greater expansion of mobile telecommunications can have a different impact whenever the level of land line penetration differs. We find that mobile cellular phone expansion is an important determinant of the rate of economic growth in sub-Saharan Africa. Moreover, we find that the contribution of mobile cellular phones to economic growth has been growing in importance in the region, and that the marginal impact of mobile telecommunication service...

Dynamic processing of virtual identities for mobile communications devices

Abstract: Virtual identities are created, where the virtual identities correspond to the primary identity of a mobile communications device or are based on the authentication of a mobile communications device. In this way, the same mobile device can send communications from different identities (e.g., different phone numbers) and/or receive communications at different identities. In one implementation, a virtual identity platform includes an identity database that makes associations between virtual identities and primary identities.

Traffic Demand and Energy Efficiency in Heterogeneous Cellular Mobile Radio Networks

Abstract: Optimization of the energy efficiency is considered not only to positively contribute to the ecological assessment, but gains in importance from operator's point of view as well, since energy costs for running a mobile radio network have an increasing share of the operational expenditure. From this perspective, the utilization of small, low power base stations is regarded as a promising strategy to enhance a network's throughput and to increase the energy efficiency. In this paper we investigate on the efficiency of homogeneous and heterogeneous networks consisting of a varying number of micro sites with regard to traffic load conditions.

An analytical model for Follow Me Cloud

Abstract: This paper introduces an analytical model for the Follow-Me Cloud (FMC) concept whereby service mobility is enabled across data centers following the mobility of a mobile user. Given a network and cloud setup and a mobility pattern of a mobile user, the proposed analytical model provides the performance of the FMC concept related to: (i) the user experience with the service (such as: UE average distance from the optimal DC, average end-to-end delay, service disruption duration); and (ii) to the cloud/mobile operator (such as the service migration cost). Obtained results are encouraging. They confirm the advantage of the FMC concept, but stress the need for careful consideration when triggering the service migration.

Push-Based Wireless Converged Networks for Massive Multimedia Content Delivery

Abstract: The fast growing wireless data traffics have brought a significant burden on the mobile cellular network and would soon cause severe congestion in the near future. In this paper, we contribute to the design and theoretical understanding of push-based content delivery in a converged broadcasting and cellular network to relieve the burden. Specifically, we are interested in analyzing the scheme in which the most popular contents are pushed through broadcasting to alleviate the cellular data bottleneck. This strategy not only offloads the multimedia traffics from the cellular network, but also improves the user experience by eliminating download waiting time. To evaluate the performance gains of the converged network, we first develop a mathematic framework to model the converged network, the multimedia content characteristics and the mobile user behaviors. The improvement of the network capacity is then derived and quantified theoretically. Furthermore, we obtain valuable insights on the impact of the network resource and parameters on the system performance. Numerical results are provided to confirm the accuracy of the developed analytical results and to show the significant performance advantages of the converged network over the cellular-only network in terms of the system power consumption and users' quality of service (QoS).