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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...

4G has been the driving force behind a number of global research initiatives in the last few years (such as the WINNER Project). However, at the preparation of this paper (October 2008) we have formal documents outlining 4G objectives (such as IMTAdvanced), and tangible standardization efforts towards achieving those objectives (such as LTEAdvanced and 802.16j/m). Therefore, 4G is moving from t...

The heterogeneous network concept offers a flexible architecture that allows an efficient utilization of radio resources by means of Common RRM strategies that ensure a coordinated management of the resource pools in each Radio Access Network. In this context, this paper discusses different strategies for initial RAT selection as one of the key CRRM strategies. A general framework for the defin...

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...

©2013 NTT DOCOMO, INC. Copies of articles may be reproduced only for personal, noncommercial use, provided that the name NTT DOCOMO Technical Journal, the name(s) of the author(s), the title and date of the article appear in the copies. *1 OpenFlow TM : A trademark of Stanford University in the United States. *2 Core network: A network consisting of service control nodes and subscriber-informat...

In this study, the pricing scheme that will be formed is a model from previous research involving of cloud-radio access network (C-RAN) and fair management models. This combines benefits internet service provider (ISP) quality (QoS) obtained by users, one which factors. The used nonlinear equation solved LINGO 13.0 program to get optimal solution. results show with regard generates maximum reve...