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GPRS tunnneling protocol (GPRS) (GTP)

The GPRSTunneling Protocol (GTP) is used for communication in General Packet Radio Service ( GPRS) on two G interfaces: The Gn interface and the Gp interface. It serves as a transport protocol between an external data packet network and a mobile station in a GPRS network. A virtual connection is established via the GPRS Tunneling Protocol whenever a Serving GPRS Support Node( SGSN) sends a request to the GPRS network.

Users ofUMTS or GSM are also connected to the Internet via the GPRS Tunneling Protocol when they change their location. The GTP protocol supports location changes by transmitting the current user data from the Serving GPRS Support Node (SGSN) to the Gateway GPRS Support Node( GGSN), which is responsible for the user session.

In the first version (V.0) of the GTP protocol, the signaling data and the user data were transmitted in a general header. The protocol can work with the User Datagram Protocol( UDP) and with the Transmission Control Protocol( TCP) and uses the port number 3386. The version V.1 works only with the UDP protocol. The Control Plane (GTP-C) uses port number 2123 and the User Plane (GTP-U) uses port 2152.

Informations:
Englisch: GPRS tunnneling protocol (GPRS) - GTP
Updated at: 03.07.2011
#Words: 186
Links: communication (COM), general packet radio service (mobile communications) (GPRS), interface (I/F), transport protocol (TP), data packet
Translations: DE
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