Satellite component of NGN: Integrated and hybrid networks

• Published in: International journal of satellite communications and networking Vol. 29; no. 3; pp. 191 - 208
• Main Authors: Kota, Sastri, Giambene, Giovanni, Kim, Sooyoung
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01.05.2011
• Subjects: cooperative communications; hybrid networks; integrated networks; Mobile communication systems; Networks; next generation networks; Satellite communications; Satellites; Segments; Traffic engineering; Traffic flow
• ISSN: 1542-0973; 1542-0981; 1542-0981
• DOI: 10.1002/sat.972

Future mobile networks are expected to involve systems that are based on different technologies, such as WiFi, WiMAX, 2G/3G/3G+, LTE, and satellite. To address this scenario, ITU has defined integrated and hybrid networks in the framework of Next‐Generation Networks. The interest is to exploit the cooperation of different wireless communication systems (segments) to provide service to mobile users in the most efficient way, taking into account signal quality (coverage), traffic congestion conditions, and cost issues. Integrated and hybrid networks have the potential to be an efficient and cost‐effective solution to employ satellite communications for mobile users. In the view of this, our paper focuses on the design of integrated/hybrid systems taking into account physical, MAC, and network layers issues. System examples and standards are described as well. Then, cooperative diversity techniques and traffic engineering issues for overflow traffic are discussed. This paper concludes identifying some possible future trends. Copyright © 2010 John Wiley & Sons, Ltd. International Telecommunication Union (ITU) is currently developing a vision of Next‐Generation Networks (NGN) with the clear objective of providing a means for true network integration. The purpose of this integration is effective utilization of the respective strengths of each network, within the context of their traditional roles and mandates. In this paper, we provide detailed definitions and architectures concerning integrated systems and hybrid systems that are both supposed to manage mobile users (Mobile Satellite Services, MSS). System examples and standards are described as well. Details are then provided on the design of integrated/hybrid systems with special attention to cooperative diversity techniques and traffic engineering issues.