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ETSI TS 103 179 specifies the Return Link Encapsulation (RLE) Protocol, which is used to encapsulate and ifnecessary fragment network layer packets such as for example IP datagrams to allow their transmission over the returnlink of an interactive satellite network.
RLE has been derived from the Generic Stream Encapsulation (GSE) protocol [1], used in the forward links ofinteractive and broadcasting satellite networks, which are normally characterised by continuous transmission, limitedvariability in the size of network layer packets, and large physical layer frames typically capable of carrying more thanone network layer packet. RLE was designed to maximise the system efficiency on the return channel, which is in turncharacterised by bursty traffic, highly variable size of network layer packets, smaller physical layer bursts, and multipleaccess constraints.
The RLE protocol is designed to provide three main functionalities which are fully specified in the present document,namely: encapsulation fragmentation frame packingRLE is today used in DVB-RCS2 [2] as well as in the S-MIM [3] standards.