The integration of a terrestrial UMTS network with a satellite platform represents one of the most attractive proposals to develop a functional Virtual Home UMTS environment for a generic mobile user provided with an “ad-hoc” dual mode terminal, which will be able to exploit the two integrated systems (hereafter referred to as “segments”) for a set of innovative multimedia services. At this pur...

As universal mobile telecommunications system (UMTS) and wireless local area network (WLAN) have complementary characteristics, convergence of UMTS and WLAN offer seamless wireless access service to users. In a converged UMTS/WLAN enhancing quality of service (QoS) for different services require call admission control and load balancing. This paper analyses the performance of wideband power bas...

Abstract Soft handover is one of the key features in UMTS networks. For a sophisticated network planning it is necessary to understand the influence of soft handover on the capacity and coverage of UMTS systems which is expressed by the soft handover gain. In this paper we derive a method for computing interference distributions for UMTS networks with and without soft handover. Thus, we are abl...

In mobile networks, sensitive information is transmitted over the radio link between Base Station (BS) and Mobile (MS). Therefore, a security mechanism based on confidentiality integrity functions designed to protect anonymity of users’. More precisely, function was standardized by Third Generation Partnership Project (3GPP) users’ data control (signaling) data. However, both are same kernel al...

This paper investigates and analyzes SIP delay in the session establishment signaling procedure in the IMS system. We investigate the delay for end-to-end link scenarios such as WiMAX-to-WiMAX, UMTS-to-UMTS, UMTS-to-WiMAX and vice versa. The analyses consider three types of delays: transmission delay, processing delay and queuing delay. The obtained results show that the main delay of session e...

In this paper a heterogeneous network model based on the IMS-SIP (session Initiation protocol) with the help of Authentication, Authorization, and Accounting (AAA) protocol that integrates the Worldwide Interoperability for Microwave Access (WiMAX), Universal Mobile Telecommunications System (UMTS) and Wireless Local Area Network (WLAN) technologies is proposed to improve QoS. The proposed Loos...

There is significant signaling message activity in Universal Mobile Telecommunication Systems (UMTS) among Core Network (CN) elements for the mobility management of UMTS subscribers. The time-overhead introduced with the performance of these signaling operations is a crucial factor that determines the overall performance of UMTS technology and affects greatly the application Quality of Service ...

This document specifies an Extensible Authentication Protocol (EAP) mechanism for authentication and session key distribution using the Universal Mobile Telecommunications System (UMTS) Authentication and Key Agreement (AKA) mechanism. UMTS AKA is based on symmetric keys, and runs typically in a UMTS Subscriber Identity Module, a smart card like device. EAP AKA includes optional identity privac...

ABSTRACT The current literature provides many practical tools or theoretical methods to design, plan, and dimension Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS) radio networks but overlooks the algorithms of the network planning and dimensioning for core networks of GSM, UMTS and IP Multimedia Subsystem (IMS). This paper introduces an algor...

The standardization of the first releases of third-generation cellular systems was finalized in ETSI/3GPP Release 99. Two major systems in this standard are the universal mobile telecommunications system (UMTS) and the global system for mobile communication/enhanced data rates for global evolution (GSM/EDGE). UMTS has been tailored to offer thirdgeneration services—that is, high user data rates...