Generic Stream Encapsulation: Difference between revisions

Revision as of 20:15, 9 April 2011

Revision as of 22:25, 10 April 2011

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{{Userspace draft|source=ArticleWizard|date=June 2010}}

{{IPstack}} '''Generic Stream Encapsulation''', or GSE for short, is a [[Data link layer]] protocol defined by [[Digital Video Broadcasting|DVB]]. GSE provides means to carry packet oriented protocols, like for example [[Internet Protocol|IP]], on top of uni-directional [[physical layer]]s like e.g. [[DVB-S2]], [[DVB-T2]] and [[DVB-C2]].

The [[protocol]] [[specification]] has been published as [[ETSI]] TS

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GSE also provides additional features that increase the protocol flexibility and applicability. Some key GSE functions/characteristics are:

* Support for multi-protocol encapsulation ([[IPv4]], [[IPv6]], [[MPEG]], [[ATM]], [[Ethernet]], [[IEEE 802.1Q|802.1pQ]] [[VLAN]]s, etc.)

* Transparency to network layer functions, including [[Internet Protocol|IP]] [[encryption]] and IP [[Van Jacobson TCP/IP Header Compression|header compression]].

* Support of several addressing modes. In addition to the 6-byte [[MAC]] address (including [[multicast]] and [[unicast]]), it supports a MAC address-less mode, and an optional 3-byte address mode.

* A mechanism for fragmenting [[Internet Protocol|IP]] [[datagrams]] or other [[network layer]] [[Packet (information technology)|packets]] over [[baseband|Base Band]] frames to support [[Link adaptation|ACM]]/[[Variable Coding and Modulation|VCM]].

* Support for [[hardware]] [[Firewall (computing)|filtering]].

* Extensibility: additional [[link protocol]]s can be included through specific protocol type values (e.g. [[Layer 2]] security, IP Header Compression, etc.).

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== Protocol Outline ==

[[Image:GSE_diagramGSE diagram.png|right|thumb|400px|alt=Diagram of GSE encapsulation and fragmentation|How GSE carries datagrams and is carried in the physical layer]]

IP datagrams, Ethernet Frames, or other network layer packets are encapsulated in one or more GSE Packets. The encapsulation process adds control information such as the network protocol type and address label, and provides an overall integrity check when needed.

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== GSE Implementations ==

=== Products Supporting GSE ===

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** [http://www.newtec.eu/products/professional-equipment/elevation/modems/ip-satellite-modem-el470/ EL470 IP Satellite Modem]

** [http://www.newtec.eu/products/professional-equipment/elevation/demodulators/ip-satellite-demodulator-el970/ EL970 IP Satellite Demodulator]

* [http://www.work-microwave.de/ WORK Microwave GmbH]

** [http://www.work-microwave.de/dvb-s_s2.html#modems Challenge Series Satellite High Speed DVB-S2 IP Modem SK-IP]

* [http://www.gcs-salzburg.at/ gcs Global Communication & Services GmbH]

** [http://www.gcs-salzburg.at/odg.html.en ODG-200 Open DVB Gateway]

** [http://www.gcs-salzburg.at/bsr.html.en BSR-200 Broadband Satellite Receiver]

* [http://www.advantechwireless.com/ Advantech Wireless Inc.]

** [http://www.advantechwireless.com/catalogue/products/amt75e-dvb-ss2-high-speed-broadcast-modem-2/ AMT 75e DVB-S/S2 High Speed Broadcast Modem]

* [http://www.comtechefdata.com/ Comtech EF Data Corporation]

** [http://www.comtechefdata.com/products/Advanced-VSAT-Series/pcdm-840.asp CDM-840 Remote Router]

* [http://www.transplaneta.com/ K.S.Transplaneta Ltd.]

** [http://www.transplaneta.com/products/ip-encapsulator dpi4502 DVB2 (S2/T2/C2) compliant IPv4 / IPv6 Encapsulator]

* [http://dveo.com/ Computer Modules, Inc.]

** [http://dveo.com/broadcast-systems/ip-over-dvb-encapsulator.shtml DVB Rocket™/S2]

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<!--- Categories --->

[[Category:Articles created via the Article Wizard]] [[Category:Television technology]] [[Category:Link protocols]]

[[Category:Television technology]]

[[Category:Link protocols]]