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Role of GTP-C in LTE?

+2 votes
1,707 views

Sorry for asking basic question, want to know the role of GTP-C in LTE. Can some describe the need, and high level functionality of GTP-C in LTE.

posted Nov 28, 2013 by Neelam

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2 Answers

+1 vote

GTP-C stands for "GRPS Tunneling Protocol".
In LTE, GTP-C is used for signalling between MME to SGW and SGW to PGW for an UE session establishment/modification/release.

Please refer 3GPP 29.274 for more details. If you have any query after going through this specification then post a query.

answer Nov 28, 2013 by Vimal Kumar Mishra
+1 vote

GTP-C message flows between different interface to setup the signalling connection. The interfaces are S11, S5, S8 and S4.

There are two type of GTP-C messages are there.
1. Path management messages
2. Tunnel management messages.

1. Path Management Messages
ECHO request/response will be used to ping destination GTP end point as well handle the restart procedure of a GTP endpoint.
Please refer ECHO message handling in GTP-C

2. Tunnel Management Messages
Different GTP-C messages are used to manage a Tunnel. The GTP-C messages are Create Session Request/Response, Create Bearer Request/Response, Modify Bearer Request/Response, Update Bearer Request/Response, Delete Session Request/Response, Delete Bearer Request/Response etc.

answer Nov 28, 2013 by Salil Agrawal
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+1 vote

I recently come across advantages of SCTP over TCP and In telecommunication most of the real time interfaces require SCTP connection example eNB to MME.

But MME to SGW and SGW to PGW GTP-C is used as signaling protocol. Why SCTP not being used? What is the advantage of using GTP-C?

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