DVB-S2X/RCS2 formats – Verification & Validation

The materials made available via this page enable validation of the implementation of the DVB-S2X and DVB-RCS2 waveforms including extensions for beam hopping and enhancement for NGSO support.

The purpose of the V&V programme is to verify equipment compliance to the standard and interoperability in a defined set of configurations that are considered most significant.

Objectives

 The objectives of the attached V&V material are as follows:

• Ensure the unambiguous description of use cases, protocols and formats.
• Facilitate the standard implementation process.
• Ease interoperability between implementations from different manufacturers.

To this end, the material consists of two main components:

• Set of streams describing the waveforms for the above configurations
• Test procedures enabling manufacturers to verify interoperability of their equipment. 

Waveform configuration streams

Several system configurations are implemented:

• Stream sets of DVB-S2/S2X frames (all modulations, including VLSNR)
• Stream sets of RCS2 bursts (Linear Modulation)
• Stream sets of Annex E Formats 5, 6, 7 (beam-hopping)

To allow testing Annex E Formats 5, 6 and 7,  the package includes streams demonstrating specific features, such as:

• Super-Frames with various lengths
• Fragmentation from SF to SF and from dwell to dwell SFH and postamble
• Header of the last PLFRAME, indicating end of the dwell

For those waveforms, three main use cases are represented:

• HTS satellite carrying plurality of service (cellular backhaul, consumer, in-flight connectivity).
• Traffic driven, medium capacity and low latency (e.g. VoIP only service)
• Traffic driven, IoT traffic

Streams included

• 12 test cases for the regular modcods of the DVB-S2X standard, including the VL-SNR set, with and without pilots, and Annex M PL-headers;
• 40 test cases for linear modulation RCS2 bursts.
• 3 test cases for the validation of the Dummy Synchronization Frame concept, specified in Annex I of [1];
• 8 test cases for periodic beam hopping with VL-SNR and fragmentation Support (Format 5), to cover single dwell, with application of different scrambling and WH codes, multiple dwells, addressing a single cell or multiple cells, and fragmentation;
• Two test cases covering single and multiple dwells for traffic driven beam hopping with VL-SNR support (Format 6);
• Two tests covering single and multiple dwells for traffic driven beam hopping without VL-SNR support (Format 7).

All streams have been verified by DVB Members.  A verification matrix is included.

Interoperability compliance

The test procedures aim to demonstrate interoperability between prototype hardware emulating the functionality of user terminals, hubs and spacecraft onboard processors. The interoperability tests will be performed against standard supporting test instruments (signal generator and signal analyser).  A test report and a declaration of interoperability will be provided by the manufacturer or the agent performing the tests. The package includes:

• Test Procedure document
• Interoperability compliance form
• Manufacturers’ declarations and test reports

Declarations and test reports submitted by manufacturers are available here.