Multiprotocol Encapsulation
Encyclopedia
Multiprotocol Encapsulation, or MPE for short, is a Data link layer
protocol defined
by DVB which has been published as part of ETSI EN 301 192. It
provides means to carry packet oriented protocols (like for instance
IP
) on top of MPEG transport stream (TS).
Another encapsulation method is Unidirectional Lightweight Encapsulation
(ULE) which was developed and standardized within the IETF as RFC 4326.
datagrams. The section header is used to convey:
MAC addresses from 1 to 6 bytes length may be used. The format of
MPEG-2
DSM-CC sections happens to be compatible with DVB MPE.
organizing MPE streams into one or more IP Platforms carried on a
broadcast network by means of the IP/MAC Notification Table
mechanism which is also defined in ETSI EN 301 192.
and
Eutelsat
) are offering commercial IP services using MPE (such as ASTRA2Connect
) to both businesses and consumers.
Data link layer
The data link layer is layer 2 of the seven-layer OSI model of computer networking. It corresponds to, or is part of the link layer of the TCP/IP reference model....
protocol defined
by DVB which has been published as part of ETSI EN 301 192. It
provides means to carry packet oriented protocols (like for instance
IP
Internet Protocol
The Internet Protocol is the principal communications protocol used for relaying datagrams across an internetwork using the Internet Protocol Suite...
) on top of MPEG transport stream (TS).
Another encapsulation method is Unidirectional Lightweight Encapsulation
Unidirectional Lightweight Encapsulation
The Unidirectional Lightweight Encapsulation is a Data link layer protocol for the transportation of network layer packets over MPEG transport streams....
(ULE) which was developed and standardized within the IETF as RFC 4326.
Protocol Outline
MPE uses MPEG-2 Private Table sections to carry the userdatagrams. The section header is used to convey:
- the frame's destination MAC address
- optional ISO/IEC 8802-2 Logical Link ControlLogical Link ControlThe logical link control data communication protocol layer is the upper sub-layer of the data link layer in the seven-layer OSI reference model...
(LLC) and ISO/IEC 8802-1 Sub-Network Attachment Point (SNAPSubnetwork Access ProtocolThe Subnetwork Access Protocol is a mechanism for multiplexing, on networks using IEEE 802.2 LLC, more protocols than can be distinguished by the 8-bit 802.2 Service Access Point fields. SNAP supports identifying protocols by Ethernet type field values; it also supports vendor-private protocol...
) information - a payload scrambling indication
- a MAC address scrambling indication
MAC addresses from 1 to 6 bytes length may be used. The format of
MPEG-2
MPEG-2
MPEG-2 is a standard for "the generic coding of moving pictures and associated audio information". It describes a combination of lossy video compression and lossy audio data compression methods which permit storage and transmission of movies using currently available storage media and transmission...
DSM-CC sections happens to be compatible with DVB MPE.
Service Architecture
A complete IP service offering over MPEG-2 TS can be established byorganizing MPE streams into one or more IP Platforms carried on a
broadcast network by means of the IP/MAC Notification Table
mechanism which is also defined in ETSI EN 301 192.
Commercial Offerings
Both major European satellite operators (SES AstraSES Astra
Astra is the name for the geostationary communication satellites, both individually and as a group, which are owned and operated by SES S.A., a global satellite operator based in Betzdorf, in eastern Luxembourg. The name is sometimes also used to describe the channels broadcasting from these...
and
Eutelsat
Eutelsat
Eutelsat S.A. is a French-based satellite provider. Providing coverage over the entire European continent, as well as the Middle East, Africa, India and significant parts of Asia and the Americas, it is one of the world's three leading satellite operators in terms of revenues.Eutelsat’s satellites...
) are offering commercial IP services using MPE (such as ASTRA2Connect
ASTRA2Connect
ASTRA2Connect is a two-way satellite broadband Internet service available across Europe, which launched in March 2007, and uses the ASTRA series of geostationary satellites...
) to both businesses and consumers.