Multi-hop ad-hoc networks consist of nodes which cooperate by forwarding packets for each other to allow communication beyond the power range of each node. In pure ad-hoc networks, no additional infrastructure is required to allow the nodes to communicate. Multi-hop hybrid networks are a combination of ad-hoc and cellular networks. As in ad-hoc networks, the nodes forward packets on behalf of o...

Abstract With the proliferation of wireless standards such as GSM/EGPRS, WLAN, WiMAX, WCDMA, HSDPA/HSUPA, and WiBRO — future wireless radio base stations will need to support multiple air-interfaces, frequency bands and modulation formats. Radio technology that enables reconfigurable hardware across multiple standards is a big challenge for base station developers. In this paper base station ar...

In this paper we review location models, specifically covering location models, which are applicable to modeling the location of base stations for cellular phone users. The definition of cover is revisited, suggesting three new definitions of cover: two gradual cover models, and one sum cover model. A new objective for covering models, the variable radius model, is proposed. The probability tha...

This research deals with an energy efficient network for military mobile base station placement. The proposed method is based on minimizing the energy loss of military communication networks where the base station is moving along a preset path and the users are constantly moving in an independent speed and direction. It takes into account the free space loss and the knife edge effect for the en...

The rapid development of mobile communications has caused a higher demand of radio channel or carrier frequency due to additional mobile subscribers. With a limited frequency bandwidth allocated to mobile operators, good network planning is important to avoid congestion in the network. Some of the methods used to improve congestion in mobile networks is cell splitting and frequency reuse, but w...

This paper discusses a novel a two-level \totally mobile" wireless communications architecture which is motivated by the need for low cost rapidly deployable communication structures. The system's capabilities for intelligent survivability and adaptive connectivity in a highly dynamic mobile environment are discussed. We design and evaluate algorithms for base station movement as well as for te...

The main contributions of this paper are to analyze an authentication and key distribution protocol for mobile computing proposed by Beller Chang and Yacobi in and reveal two problems associated with their protocol to propose a new authentication and key distribution protocol that utilizes a broadcast channel in a mobile network A particularly interesting feature of the new proposal is that it ...

mobile phones, mobile phone base stations, cordless phones and power lines are among the main sources of our daily exposures to radiofrequency electromagnetic fields (rf-emf). today, a large proportion of children aged eight and under has used smart phones and tablets for media activities such as playing online games, watching videos or using different applications. over the past several years,...

Recent advances in mobile computing and wireless technologies resulted in the emergence of new services such as Video-on-Demand. However, high rates of disconnection, low bandwidth, and other problems still strongly affect the quality of such services. To address some of these challenges, we propose a new model for the caching of video content that takes advantage of the cooperation among distr...