Especially for expensive links, like for Satellite links, it is important to make most out of the available capacity. gcs provides various technologies to help our customers to optimize their links:

• Modulation and Coding: DVB-S2 uses optimized modulation schemes and advanced block coding mechanisms. Thus, it provides about 30 percent and more performance gain, compared with DVB-S with the same bandwidth and signal-to-noise ratio. gcs provides DVB-S2 Modulators (ODG Series) and DVB-S2 Demodulators (BSR Series). Of course, GCS products are fully compliant to all relevant standards and thus interoperable with the products of our competitors and end-user DVB equipment.
• Adaptive Coding and Modulation (ACM): gcs products supports an advanced DVB-S2 feature called ACM which allows to dynamically optimize the coding and modulation to the currently available link-conditions.
• Encapsulation Protocols: ULE for DVB-S/S2 and GSE for DVB-S2 are more efficient than the currently mostly used MPE encapsulation mechanism, especially for IPv6 traffic. gcs products supports all of these protocols and allows for a smooth transition towards GSE.
• Compression and Web Caching: The SiMPLE product family supports transparent adaptive content compression as well as web caching to optimize the performance of an satellite link. Furthermore it supports encryption, DNS off-loading and provides interfaces for Authentication, Authorisation and Accounting (AAA).

Security

Security is an important topic, especially for broadcast links. However, still many satellite links are not protected by any encryption mechanism. Hence, an eavesdropper needs only a small satellite dish within the footprint of the satellite and can easily receive all transmitted data.

gcs provides security solutions which efficiently prevents such attacks on our customers data. We support encryption as well as authentication on different ISO/OSI layers using IPSec, PPTP, OpenVPN or DVB-specific link layer security schemes like ULESec, where GCS closely collaborates with the authors of the according IETF draft.