Satellite Technology for IP

Satellite Technology for IP

Leadership in IP Networks over Satellite

SatLink Communications has delivered many “industry firsts” in satellite communications since the 1980s. With decades of deep technical expertise in all types of satellite and IP (Internet Protocol) networking technologies and close partnerships with customers, SatLink Communications has the experience to design, build, and deliver complete satellite networking solutions that are focused on the economic drivers customers care about the most. These include efficiency, throughput, and reliability (at both the link level and hardware level), plus built-in value-added IP networking features in the upper layers for network acceleration.

These are the factors with the greatest user application performance benefits, but SatLink Communications does not stop there. Our technology and solutions also greatly simplify the planning, operational management, and growth of satellite networks carrying IP traffic, from a few remote terminals (or VSATs) up to many tens of thousands of VSATs, with a scalable Open Architecture, comprehensive support for industry standards, and cost-effective products to serve industrial, professional, and consumer markets.


TDM/TDMA:  The Satellite Technology for IP Networks 

Of particular importance is SatLink Communications' 20+ year record of foresight and leadership in the R&D and commercialization of satellite technologies for TDM/TDMA networks.  This is the use of TDM (Time Division Multiplexing) in combination with TDMA (Time Division Multiple Access) for interactive (i.e., two-way) communications via satellite to almost any location on or near the earth.  The figure below illustrates the basic elements of a TDM/TDMA network.

TDM-TDMA Network

TDM/TDMA networks, in general, provide better efficiency, faster throughput, and greater reliability for a given financial budget or a given satellite transponder resource pool, than any other satellite networking technology. This is due in large part to their native ability to dynamically share bandwidth-on-demand in such a way that it appears that the necessary & allowed bandwidth is always available in a well-managed network. This is ideal for IP networking and required to deliver the increasingly high-speeds and reliable IP application throughputs users demand.

It was in the early 1980s that SatLink Communications first introduced ground-breaking TDM/TDMA technology for packet-based networks (before most people even heard of the Internet). This was followed up in the 1990s with high-capacity carrier-class voice/data network systems that handled IP traffic more efficiently than competitors. Continuing into the 1990s and the 2000s, SatLink Communications introduced integrated switched IP telephony, dynamic bandwidth allocation, traffic engineering, and advanced quality of service (QoS) features for IP networks to enable multi-tiered value-added services, multiple media types, and GSM voice over satellite, all with maximum spectrum efficiency and IP packet handling efficiency for the technologies available at the time.


DVB-RCS: The Standard for TDM/TDMA

DVB-RCSStarting around the year 2000, SatLink Communications delivered the first commercial implementations of the new international standard for TDM/TDMA networks called DVB-RCS – which was designed specifically to handle IP traffic.

Throughout the last decade DVB-RCS technology provided the most advanced dynamic TDMA technology on the market. SatLink Communications applied it successfully to handling all types of IP data traffic and media (e.g., voice and video) concurrently with excellent Quality of Service (QoS) for delay sensitive voice and video traffic.

The DVB-RCS standard has for many years received strong industry and government backing. See DVB-RCS & DVB-RCS2 for more information on the importance of these standards.

Also in the previous decade, SatLink Communications' R&D team pioneered large-scale IP mesh networking among low-cost VSATs using dynamic TDMA methods based on DVB-RCS standards, achieving further performance, reliability and efficiency gains not previously realized within the industry for mesh networking, while also simplifying IP routing protocol management in large scale, wide-area mesh – a challenge totally unique to satellite-based IP networks.

DVB-RCS2In the years since 2010, SatLink Communications' R&D team, through its own R&D efforts and its leadership of industry consortia under sponsorship of the European Space Agency, delivered a major advancement in dynamic MF-TDMA burst modem technology to serve as the basis for the next generation of the DVB-RCS standard, which is now established as DVB-RCS2.

Similar to the major performance advancements of DVB-S2 over DVB-S for TDM performance, DVB-RCS2 has established the new industry benchmark for TDMA performance worldwide, which others have yet to match.

For more technical information on TDM/TDMA and the leading DVB-RCS2 technology, see DVB-RCS2: Advancing TDM/TDMA Technology

For a technical comparison of TDMA vs. SCPC (Single Channel Per Carrier) technology (an older, traditional technology) see this SatLink Technical Note:  TDMA vs. SCPC in Satellite Networks.

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NSSLGlobal Technologies AS:
Martin Linges vei 25 N-1364
Fornebu, Norway
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Tel: +47 67535337
Fax: +47 67535335

Partner Program

The Authorized Partner Program is designed for value-added resellers of satellite networks and teleport operators with a regional, industry and/or application focus who wish to work closely with SatLink Communications and base their solutions on our industry leading SatLink® VSATs and Hubs.  Learn more...