SHAPING THE FUTURE OF SATELLITE COMMUNICATIONS
MPE and DVB-DSNG
• The satellite interface carries TS frames; the Ethernet interface carries Ethernet
frames;
• TS frames are directly demodulated from the satellite link;
• DVB-DSNG symbols are demodulated into TS frames and subsequently
unpacked into MPE packets. These packets are then de-capsulated into IP
packets and sent over the Ethernet interface. The IP packets are transmitted
over Ethernet according the routing table.
MPE and DVB-S2
• The satellite interface carries DVB-S2 baseband frames; the Ethernet interface
carries IP data;
• Baseband frames (BBF) are directly demodulated from the satellite link.
The S2-BBF are decapsulated into TS frames and subsequently de-packed into
MPE packets. These packets are then de-capsulated into IP packets and sent over
the Ethernet interface. The packets are transmitted over Ethernet according to the
routing table.
8.4.2 Processing Mode 2 – Eth(IP)<->Air(XPE)
The processing mode “Eth(IP))<->Air(XPE)” is used in applications where
bandwidth efficiency is important, such as IP backbone or IP trunking applications.
XPE is a proprietary technology so Newtec equipment is necessary on both ends
of the transmission chain.
The characteristics of this processing mode are:
• Only supported with DVB-S2 modulation;
• Possible multi-stream operation (up to 32 streams, each tagged with a separate
ISI);
• All routing schemes are supported: L2 Ethernet bridge, L3 IP bridge and IP
routing;
• Full support of VCM and FlexACM.
The AIRMAC address or destination address of the receiver can be switched on or
off.
You can enable or disable the AIRMAC address.
This depends on the used symbol rate and the allowed jitter in the network.
• Low symbol rate: the AIRMAC address is enabled to reduce the amount of jitter;
• High symbol rate: the AIRMAC address can be disabled, this to use the
bandwidth in a more efficient way.
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