This document provides an overview of key 3GPP protocols, specifications, nodes and interfaces related to LTE networks. It includes a table listing common 3GPP acronyms and their definitions, as well as diagrams illustrating the 3GPP system architecture and key interfaces between network nodes.

1. Diameter
EMM EMM
PROTOCOLS and their SPECIFICATIONS
Diameter RFC 3588, RFC 3589, RFC 4006, RFC 4740
EPS Mobility Management, 24.301
LTE NETWORK REFERENCE
ESM ESM EPS Session Management, 24.301
GRE GRE Generic Routing Encapsulation, RFC 2784, RFC 2890
GTPv2-C GTPv2-C GPRS Tunneling Protocol ver. 2 Control Plane, 29.274 P-GW/PCEF H-PCRF PSTN
GTP-U GTP-U GPRS Tunneling Protocol User Plane, 29.281 Gx
IKEv2
MAC
IP
IKEv2
IP
MAC
Internet Key Exchange ver. 2, RFC 5996
Internet Protocol, RFC 791
Medium Access Control, 36.321
Diameter
SCTP TCP
IMS
PDCP PDCP Packet Data Convergence Protocol, 36.323
PHY PHY Physical Layer for the Radio Link, 36.302
IP CPE
GTPv2-C
PMIPv6 PMIPv6 Proxy Mobile IP version 6, 23.402, 29.275
UDP
RLC RLC Radio Link Control, 36.322 Network 3GPP ACRONYMS and NODES
RRC RRC Radio Resource Control, 36.331
3GPP Third Generation Partnership Project
S8
RTP RTP Real-Time Transport Protocol, RFC 3550 AAA Authentication, Authorization and Accounting
Payload
S1AP S1 Application Protocol, 36.413
GTP-U
S1AP
UDP
CPE Customer Premise Equipment
Diameter (S9 & Rx)
S101-AP S101-AP S101 Application Protocol, 29.276 SWx 3GPP AAA eAN Evolved Access Network
HSS eHRPD Evolved High Rate Packet Data
SCTP SCTP Stream Control Transmission Protocol, RFC 4960 Diameter Server eNB Evolved Node B
SCTP
SIP Session Initiation Protocol, RFC 3261 SCTP TCP
S9
SIP ePDG Evolved Packet Data Gateway
TCP TCP Transmission Control Protocol, RFC 793 E-UTRAN Evolved UTRAN
UDP UDP User Datagram Protocol, RFC 768 GERAN GSM-EDGE Radio Access Network
H-PLMN Home PLMN
X2AP X2AP X2 Application Protocol, 36.423 HRPD High Rate Packet Data
not specified Not Specified (proprietary) HSGW HRPD Serving Gateway
HSS Home Subscriber Server
H-PLMN IMS
LTE
IP Multimedia Subsystem
Long Term Evolution
MME Mobility Management Entity
V-PLMN MME
MME
3GPP AAA Sp
V-PCRF NAS
PCC
Non-Access Stratum
Policy and Charging Control
PCEF Policy and Charging Enforcement Function
Proxy SPR not specified PCRF Policy and Charging Rules Function
PDN Packet Data Network
S4 SGSN HSS P-GW
PLMN
PDN Gateway
Public Land Mobile Network
PSTN Public Switched Telephone Network
RAT Radio Access Technology
RNC Radio Network Controller
SGSN Serving GPRS Support Node
UTRAN S-GW
SPR
Serving Gateway
Subscription Profile Repository
UE User Equipment
UTRAN Universal Terrestrial Radio Access Network
V-PLMN Visited PLMN
RNC P-GW/PCEF 3GPP INTERFACES and TECHNICAL SPECIFICATIONS
RRC IP Interface Nodes Technical Specification
PDCP Gx PCRF PCEF 29.212
RLC Gxa HSGW PCRF 29.212
MAC LTE-Uu UE eNB 36.300
PHY UE NAS UE MME 24.301
Rx AF PCRF 29.214
S1-MME eNB MME 36.413
OFDMA
S-GW S1-U
S2a
eNB
HSGW
S-GW
P-GW
36.414
23.402, 29.275
LTE-Uu
S2b P-GW ePDG 23.402, 29.275
S3 MME Rel. 8 SGSN 29.274
S4 S-GW Rel. 8 SGSN 29.274
SWa
S5/S8 S-GW P-GW 29.274 (control plane)
29.281 (user plane)
S6a HSS MME 23.401, 29.272
S6b 3GPP AAA P-GW 29.273
ePDG S6d
S9
SGSN
H-PCRF
HSS
V-PCRF
29.272
29.215
S10 MME MME 29.274
S11 MME S-GW 29.274
S12 RNC S-GW 29.281
Interface LEGEND S101 MME eHRPD eAN 29.276, 23.402
eNB Traffic
S103
SGi
S-GW
P-GW
HSGW
IP Network
29.276, 23.402
29.061
eNB Traffic and Signaling
Sp PCRF SPR 29.203
3GPP2 AAA STa Trusted Access AAA 23.002, 23.402, 29.273
E-UTRAN HSGW Proxy
Signaling Only SWa Untrusted Access AAA 23.002, 23.402, 29.273
Trusted non-3GPP Untrusted non-3GPP Service Control Plane SWd
SWm
AAA Proxy
ePDG
AAA Server 23.002, 29.273, 23.234
3GPP AAA 23.002, 29.273
eAN (Wi-Fi) Inter-RAT SWn ePDG Untrusted Access 23.402, 23.234
eHRPD Radio SWx
X2
HSS
eNB
3GPP AAA
eNB
23.002, 29.273, 23.402
36.423 (control plane)
NAS 36.424 (user plane)
© 2011 Award Solutions, Inc. LTE_901 Version 3.4