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SUMMARY This paper presents an overview, status, key technologies, and main benefits of DVB‐RCS2, as well as the target goals of what is probably the largest standardization effort conducted for satellite communication systems. In addition to the novel technology elements overview and to appreciate the background, basis, and mechanisms involved, we highlight the process and the key research investigations that characterized the standardization effort. We offer a brief comparison with the first‐generation DVB‐RCS, and we highlight the various profiles for different target use cases and include the latest status of the mobile and mesh capabilities. Finally, we describe the structure of the standard and allow ourselves to share some thoughts of the impact it may have. Copyright © 2013 John Wiley & Sons, Ltd.

Abstract. This paper describes a CDWCDMA based approach for a 3-rd generation multi-beam satellite mobile and personal communications system using Highly Elliptical Orbit (HEO) satellites. The forward link uses a synchronous CDM intrabeadasynchronous CDM inter-beam approach, while the return link uses a quasi-synchronous CDMA intra-beadasynchronous CDMA inter-beam approach. Using probabilistic analysis, these approaches are shown to provide higher forward and return link capacities than equivalently synchronized FDM/FDMA approaches. Forward link transmissions are modulated using QPSK. Return link transmissions are modulated using either d4-QPSK or precompensated frequency modulation (PFMJ). PFM4 is intended for use with a saturated amplifier in low-cosdpower-efficient. e.g. hand-held, terminals, and can be demodulated using a d4-QPSK receiver. All forward and return link transmissions are coded using a rate constraint length 9, convolutional code. The paper summarizes several key tradeoffs and the resulting system design.

SUMMARY This paper presents security features in the second generation digital video broadcasting with return channel via satellite standard (DVB‐RCS2). The up‐front consideration of security, and in particular transmission security (TRANSEC), started with the development of security requirements introduced in the DVB‐RCS Next Generation (NG) Commercial Requirements and Call for Technologies. It was apparent at an early stage that no single approach or implementation would satisfy the wide range of product and security requirements to span consumer, professional and government market sectors. This led to the introduction and development of two important concepts: TRANSEC profiles, a specialization of DVB‐RCS2 system level profiles concept; and TRANSEC ‘hooks’, extension points that allow TRANSEC functionality to be added as necessary, governed by profile security requirements. The bulk of this paper outlines and describes the three TRANSEC profiles presented in the DVB‐RCS2 Lower Layer Guidelines document. Finally, the various profiles are compared and contrasted. Copyright © 2013 John Wiley & Sons, Ltd.

In this paper we address the emerging application of mobility to DVB-S2/DVB-RCS systems, sometimes also referred II. SCENARIO DEFINITION to as Satellite-On-The Move (SOTM) communications. Satellite communications have great commercial success in digital audio A. Architecture and Scenarios and video broadcasting as they exploit the inherent wide areaThe baseline system architecture considered throughout this coverage for distribution content. It was a natural consequence to paper is a satellite-based communication system which uses extend its use to multimedia applications; DVB-S2/DVBRCS DVB-S2 on the forward link and DVB-RCS on the return link standards offer a commercially proven solution for fixed in order to provide large user groups on planes, ships, trains terminals in that sense. This paper presents techniques of etc. with services such as high-speed interet connection, live spectrum spreading for DVB-S2/DVB-RCS systems detailing video, e-mail, video and radio on demand, file transfer, etc. which solutions were envisaged and presenting some Fig. 1 shows a generic overview of this system. Some mobility performance results.features and techniques actually under definition and