Solutions for Satellite IP Data Transmission - Satcom Services
Solutions for Satellite IP Data Transmission - Satcom Services
Solutions for Satellite IP Data Transmission - Satcom Services
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TALK / DATA<br />
TALK<br />
RS CS TR RD TD CD<br />
TALK / DATA<br />
TALK<br />
RS CS TR RD TD CD<br />
and have lower operational costs, particularly at initial network deployment. The<br />
hard committed bandwidth of SCPC is also attractive to many users of SCPC<br />
networks.<br />
The DVB-SCPC network architecture is shown in below:<br />
<strong>IP</strong> Encapsulator<br />
AMT-70<br />
AMT-34<br />
1:N<br />
Splitter<br />
S5400<br />
S5400<br />
Customer<br />
LAN<br />
Customer<br />
LAN<br />
Optional<br />
Router<br />
AMT-34<br />
HUB<br />
TERMINALS<br />
Figure 1: DVB-SCPC Network Architecture<br />
Forward Link<br />
The <strong>for</strong>ward link is based on the DVB-S/S2 standard (EN 300 421/ EN 302 307)<br />
used <strong>for</strong> digital video broadcasting. The <strong>for</strong>ward link carrier rate can vary from 1-<br />
45MBaud with data rates of up to 80Mbps (limited by terminal throughput).<br />
The <strong>for</strong>ward link uses Multi-Protocol Encapsulation (MPE) of <strong>IP</strong> data into MPEG<br />
frames. An Advantech encapsulator is used in the Gateway <strong>for</strong> data<br />
encapsulation; however, this architecture is suited to introduction of 3 rd party<br />
encapsulators.<br />
Return Link<br />
The return link is an MPEG-based SCPC carrier that utilizes the coding available<br />
in DVB-RCS. To maximize return link bandwidth efficiency, section packing is<br />
used in conjunction with MPE.<br />
The return link supports both QPSK and 8PSK modulation.<br />
www.satcom-services.com<br />
Created on 12/12/2006 18:24:00 Issue 56
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