TLC Sat Satellite Multimedia Group

Satellite Emulator

11.02.2010 · Posted in Laboratory, Late News

Satellite Multimedia Group has developed several tools to support studies related to satellite communications. A detailed description of both such tools and some related research activities can be found here >>>>SMG tools<<<<

The group is developing a satellite simulator composed of 5 PC to study applications and transport protocols in an emulated satellite environment.

The figure below shows details about the satellite emulator:

dsc_0223

Every PC emulates a single component of a tipical satellite environment VSAT, with DVB-RCS or terrestrial return channel. In particular, pc are involved in:

  1. Gateway/HUB
  2. Satellite
  3. Satellite terminal (i.e. modem)
  4. User terminal (i.e. client FTP and HTTP)

Figure, shows the pc’s logical interconnections:

snep.jpg

wip.pngA web interface (for testing IP real traffic on the Gateway/Hub using the satellite emulator) is available at the link:

http://tlcsat.dyndns.org

DAMA DVB-RCS NS2 patch

09.02.2010 · Posted in Laboratory, Late News


DAMA DVB-RCS NS2 patch available
To apply on latest ns-2.32 version, it makes possible to test TCP connections behavior in simulated DVB-RCS environment with a DAMA shared return channel. Satellite Terminals can be configured so that capacity is requested with CRA, RBDC and VBDC (also mixed) strategies, up to the system capacity.

Return channel is composed of a single carrier divided temporally into frames. A group of frame, each one composed of a constant number of slots, make a superframe. A slot is the minimum amount of capacity allocated to a terminal.

dama_ns2_tr.gif

Examples of results obtained with the patch are available in the following brochure:
damaforns2.pdf

Download the patch for ns-2.32:
patch DAMA DVB-RCS

TOP DEMO online

09.01.2010 · Posted in TOP

TOP Project – TCP-Noordwijk online demo.

The satellite emulator platform has been adapted to host a demo on TCP-Noordwijk performance over an I-PEP ↔ I-PEP satellite link with DAMA.

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