GTPv2 – GPRS Tunnelling Protocol version 2
In LTE , GTP (GPRS Tunnelling Protocol) tunnels are used between two nodes communicating over a GTP based interface, to separate traffic into different communication flows. A GTP tunnel is identified in each node with a TEID (Tunnel Endpoint Identifier), an IP address and a UDP port number. The receiving end side of a GTP tunnel locally assigns the TEID value the transmitting side has to use. The GTPv2 include an updated control plane which enables control messages to be passed between the MME , S-GW , PDN GW etc.
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