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Parts of a GTPv2 network

6.0.0
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GTPv2, defined in 3GPP TS 29.274, is dramatically different from GTPv1, defined in 3GPP TS 29.060. Where in GTPv1 the tunnel is between the SGSN and the GGSN, in GTPv2 The SGSN is between the MME and the LTE Serving Gateway (S-GW), beyond which is the PDN gateway (P-GW). Even tunnel management messages have changed significantly.

Network diagram for GTPv2

Device roles on a GTPv2 network
Device role Neighboring Devices Interfaces used Protocols used
Mobile Users Mobile Stations (MS) Radio Access Technology (RAT) --
GTPv1 Mobile Stations (MS) Mobile Users, SGSN Gb IP, Frame Relay
GTPv2 Mobile Stations (MS) Mobile Users, MME ??? IP, Frame Relay
SGSN (local) GTPv1 MS, SGSN, S-GW ??? IP, Frame Relay, GTPv1, GTP’
S-GW SGSN, MME, P-GW ??? IP, GTPv2, GTP’
P-GW S-GW, Internet, other external services ??? IP, GTPv2

GTPv2, defined in 3GPP TS 29.274, is dramatically different from GTPv1, defined in 3GPP TS 29.060. Where in GTPv1 the tunnel is between the SGSN and the GGSN, in GTPv2 The SGSN is between the MME and the LTE Serving Gateway (S-GW), beyond which is the PDN gateway (P-GW). Even tunnel management messages have changed significantly.

Network diagram for GTPv2

Device roles on a GTPv2 network
Device role Neighboring Devices Interfaces used Protocols used
Mobile Users Mobile Stations (MS) Radio Access Technology (RAT) --
GTPv1 Mobile Stations (MS) Mobile Users, SGSN Gb IP, Frame Relay
GTPv2 Mobile Stations (MS) Mobile Users, MME ??? IP, Frame Relay
SGSN (local) GTPv1 MS, SGSN, S-GW ??? IP, Frame Relay, GTPv1, GTP’
S-GW SGSN, MME, P-GW ??? IP, GTPv2, GTP’
P-GW S-GW, Internet, other external services ??? IP, GTPv2