• Research Areas
• ARTS Research projects
• Publications
• Collaborations

Research focuses on III and IV generation cellular systems, such as UMTS (Universal Mobile Telecommunications Systems) and so called all-IP UMTS (extension of IP protocol to the UMTS UTRAN). In this scenario our studies mainly address: novel techniques to enable multimedia terminals (supporting voice, video, and data traffic) to effectively access shared channels of integrates systems are addressed, algorithms and policies for optimum resource allocation to multimedia traffic and multimedia call management, mobility handling and effective resource allocation in multi-tier (that is, characterized by overlapped coverage) systems. A further topic of the research is the integration of cellular systems with satellite and WLAN segments. As for wireless systems, the following aspects are investigated: interconnection among mobile segments and WLAN segments with IEEE 802.11e protocol; solutions to WLAN integration into all-IP UTRAN; design of mobile gateways and inter-vehicular networks to support ITS (Intelligent Transportation Systems) applications with relevant optimized algorithm for routing and best gateway selection; interconnection of ad-hoc networks and IP backbones.
Recently, our focus has been on research issues relevant to WiMAX technology and WiMAX/WiFi systems operating in meshed modality, as well as on issues relevant to the integration of wireless sensor networks into telecommunication systems to the aim of deploying the so called "Ambient Networks".

Research activities

Mobile and cooperative Networks and Protocols:

• Novel QoS and mobility management protocols for multimedia terminals in multi-tier systems.
• Priority based handling of handoff call based on the mobility profile estimation of the terminal in both urban and suburban environment.
• MAC protocol optimization in WLAN IEEE 802.11e networks based on the dynamic variation of transmission priorities.
• Novel protocols for Transport, Medium Access Control, and Call Admission Control based on the soft-QoS paradigms to support multmedia application in integrated wireless systems.
• QoS Routing in multi-hop homogeneour/heterogeneous wireless systems.
• Network level and application level cooperative protocols and architectures.
• QoS control mechanisms in WiFi networks with meshed configuration (802.11s) to support both unicast and multicast traffic.

Mobile gateway e Mobile Networks

• Design of interconnecting Gateways between WLAN and geographic networks with either a fixed (QoS IP) or a wireless mobile (3G, beyond3G, and 4G) communication infrastructure.

WIMAX standard

• Cross-layer techniques for QoS handling in WiMAX systems.
• WiMax integration with different communication technologies.

Involved People: Antonio Iera, Antonella Molinaro, Giuseppe Araniti, Giuseppe Ruggeri, Sergio Polito, Sara Pizzi, Ravi Agarval (visiting researcher); Trajce Dimitrievski (visiting researcher); Domenico Tripodi; Antonino Vilasi; Alessandro Cortese; Carmelo Riso.

Main Collaborations: CNIT, Università di Roma Torvergata, University of Kanpur, University of Skopije, Politecnico di Torino, Assomax, SICE, Telecom, Vodafone, Wind, Aachen University, Tilab.