In this paper, we propose a flexible and fairness-oriented packet scheduling approach for 3GPP UTRAN long term evolution (LTE) type packet radio systems, building on the ordinary proportional fair (PF) scheduling principle and channel quality indicator (CQI) feedback. Special emphasis is also put on practical feedback reporting mechanisms, including the effects of mobile measurement and estimat...

In this article, we focus on Call Admission Control (CAC) in the presence of both real-time and elastic flows in a multicell UMTS environment where elastic flows share a common, shared channel. We first study the capacity of a multicell UMTS system. We determine an upper bound on the other-cell interference and obtain novel expressions for the SIR and powers for both the uplink and the downlink...

The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) defines a wireless network standard for high packet transmission rate and low packet latency provisions. Handover is one of the important features for helping user equipments (UEs) to roam between LTE networks. However, LTE networks adapt a make-before-break handover procedure, which may cause a brief disconnection, therefo...

The goal of this work is first to analyze the feasibility of a peer-to-peer file sharing technique in mobile cellular environments, taking into account key characteristics and peculiarities of the UMTS Radio Access Network (UTRAN). The concept is referred here to as mobile-tomobile (m2m). Next, our research efforts explore the performance benefits of m2m file sharing applications in UMTS networ...

The evolution of wireless networks has led to the deployment of different Radio Access Technologies (RATs) such as UMTS Terrestrial Radio Access Network (UTRAN), Long Term Evolution (LTE), Wireless Local Area Network (WLAN) and Mobile Worldwide Interoperability for Microwave Access (WiMAX) which are integrated through a common platform. Common Radio Resource Management (CRRM) was proposed to ma...

The era of new wireless communications is upon us. Eventually it will penetrate into our daily life and change the way we live just like many technological innovations whose original research came from the life needs. To achieve these requirements, the society of 3 Generation Partnership Project (3GPP) is presently evolving Long Term Evolution Advanced (LTEAdvanced) as a development of the stan...

Wireless systems in NGN, will integrate different network access technologies, e.g. wireless Local Area Network (WLAN), UMTS Terrestrial Radio Access Network ( UTRAN), and WiMax, Moreover, this integrated wireless system, will have to handle diverse types of traffics, such as data traffics ( e-mail, web browsing, ftp), voice traffic (VOIP), and multimedia traffics ( video conferencing, Online T...

The standardisation work of GSM-based systems has its roots in the 1980s, when a standardisation body ‘Groupe Special Mobile’ (GSM)1 was created within the Conference Europeenne des Postes et Telecommunications (CEPT), whose task was to develop a unique digital radio communication system for Europe, at 900 MHz. Since the early days of GSM development, the system has experienced extensive modifi...

he earlier evolution of broadband wireless technologies is the consequence of growing demand in the world for best ever mobile Internet access and wireless multimedia applications. This paper explores the network architecture of 4G (4th Generation) and LTE (Long Term Evolution) wireless technologies, the mobile standards used by these technologies and key features. The 4G architecture basically...

The E2R-II prototyping environment, as part of the E2R-II project, is a framework that pretends to demonstrate the most promising radio resource management proposals that are developed within the project. Such demonstrations have been based on a dedicated proof-of-concept environment, which serves for validating the work in the areas of cognitive networks, reconfigurable terminals, enhanced rad...