Communication networks and mobile devices integrate an increasing number of access technologies. At the same time, new business roles emerge, which lead to new cooperation schemes between access providers providing different types of access connectivity. As a result, a variety of access technologies will be available for users at the same time. In this article we present an architecture and a f...

Finland, among the first to adopt mobile broadband services, faces rapid growth of mobile data traffic. Therefore, Finnish mobile operators continually invest in their radio access networks to handle this growth, which represents an attractive revenue source. This study presents a demand curve estimate for mobile broadband data traffic, which takes into account the impact of technology evolutio...

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The principal objective of this work is to show that ubiquitous communication, in a vehicular communication environment, is possible by exploring the existing radio access networks. Proper channel modeling is essential to utilize current network infrastructure. An overview of basic channel propagation models and fading models are presented here. Then vehicle-to-vehicle

Coupling of Wireless LANs like IEEE 802.l1a1b or HIPERLANI2 systems with Public Land Mobile Networks (PLMNs) like GSM or UMTS offers benefits for both operators and users. Coverage and capacity of an operator's network can be extended with equipment expected to be considerably cheaper than for PLMN coverage. Thus, the operator can participate in the expected WLAN boom. Its customer experiences ...

The evolution of Software Radio concept provides increased features to radio access networks. The reconfiguration of radio equipment requires the existence of an architecture, a common framework, that allows a flexible management, in any sense, of software running on radio processors. Such framework must take into account the heterogeneity of hardware devices and platforms where the radio appli...

Today there are many standards, mixed wireless networks and mobile devices with many standards. The operators develop heterogeneous wireless networks to provide access to many services. The mobile devices with many standards use several active applications simultaneously to work with the different networks or the network recourses. Functioning of such mobile devices requires coordination and co...

In recent years, the Information and Communication Technology (ICT) industry has actively participated in public discussions about energy consumption in terms of the industry’s role as a large consumer, and solutions for reducing impact on the environment from transports and other energyconsuming activities. Rising usage and new product and service launches have undoubtedly increased energy con...

Usually broadband wireless access networks are considered to be enterprise level networks providing us with more capacity as well as coverage. We have seen that in remote inaccessible areas wired networks are not at all cost effective. Wireless networking has offered us an alternative solution for such problem of information access. They have definitely changed the way people communicate and sh...