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Admission Control Policies for WCDMA Satellite Return Link in an Avionic Environment.pdf

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Admission Control Policies for WCDMA Satellite Return Link in an Avionic Environment

Admission Control Policies for WCDMA Satellite Return Link in an Avionic Environment Paolo Dini(1), Marco Massaroni(2) (1) INFO.COM department University of Rome “La Sapienza” Rome, Italy paodini@infocom.uniroma1.it (2) DIS department, University of Rome “La Sapienza” Rome, Italy apollonio001@libero.it INTRODUCTION During the last years, In-Flight Entertainment (IFE) has become one of the hot topics in the communications world. This is mainly due to the fact that aircraft seems to be one of the last remaining islands where personal communications, Internet access and real-time communications are not available [1]. Therefore, airlines are increasingly requiring in- flight services to offer similar entertainment or business experience to passengers as their terrestrial counterparts. To make this possible, broadband communications with high bit rate have to be provided to aircraft. European project NATACHA (Network Architecture and Technologies for Airborne Communication of Internet High Bandwidth Applications) will provide a new generation mobile real-time Internet connection up to the aircraft through bi-directional high bandwidth satellites, thus realizing the concepts of “office and entertainment in the sky”. The project basically focuses on the embedded airborne systems part of the communication system and its interface to the satellite link. In particular, system architecture foresees three sub-networks (also referred as segments): Aircraft, Satellite and Ground. The Aircraft segment is composed by a router, called Network Control Router (NCR) that interfaces the on board LAN with the Satellite Broadband Terminal. It is a special terminal, developed in the framework of the project, in charge of transmitting/receiving IP traffic through the satellite link. Satellite segment is composed by a constellation of geostationary (GEO) satellites working in Ku-band. Finally, Ground segment consists of an on ground Satellite Broadband Ter