TM-RCS (Inactive)

First published back in 2000, DVB-RCS is a technical standard that defines a complete air interface for two-way satellite broadband VSAT (very small aperture terminal) systems. DVB-RCS is now released in Second Generation with Mobile and Mesh extensions, called DVB-RCS2. 

The first generation of DVB-RCS was aimed at optimizing the physical layer performance. DVB-RCS2 enhances the physical layer performance and capabilities relative to DVB-RCS, and introduces ACM support for the return link complementing DVB-S2 ACM in the forward link. DVB-RCS2 also extends the scope of the specifications from being solely a physical and link layer specification to being a complete interactive satellite communications system specification for IP communications. DVB-RCS2 retains all the functionality of the first generation, including provisions for mobile terminals and mesh networks. 

DVB-RCS2 was initially published in 2011, with the mobile and mesh extensions as well as the guidelines completed in 2012. With the latest additions of the mobile and mesh capabilities, DVB-RCS2 specifications are ready to serve consumer, professional and governmental market segments. 

DVB-RCS2 offers a substantial enhancement in the performance relative to DVB-RCS, and is also optimized for Ka-band (and higher) frequencies, via technologies like adaptive coding and modulation in both forward and return links. DVB-RCS2 offers efficient and scalable ways of translating IP-level QoS to satellite resource management, as well as interfaces for equipment and service management. 

In their basic form, both RCS-generations offer “hub-spoke” connectivity; i.e., arrangements where all user terminals are connected to a central hub that both controls the system and acts as a traffic gateway between the users and Internet/intranet.. User terminals typically consist of an indoor unit and an outdoor unit with an antenna size comparable to that of a conventional direct-to-home TV receiver. Since user terminals also transmit, outdoor units include an RF power amplifier. In addition to the hub-centric architecture, optional “mesh” extensions are specified, supporting direct communication between terminals through a single satellite hop, using transparent or regenerative satellite payloads. The range of mandated capabilities in the DVB-RCS2 specifications concerns the capabilities of the user terminals, since it should be possible to select and acquire connectivity with any compatible Gateway using any compatible user terminal, even if not all features are exploited in a given Gateway.


Harald Skinnemoen

TM-RCS Chairman


Harald Skinnemoen


AnsuR Technologies AS