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LTE-EPC AND IMS REFERENCE

Protocols
BICC	(SS7) Bearer Independent Cali Control, ITU-T Q.1901
Diameter	RFC 3588, RFC 3589, RFC 4006, RFC 4740
DNS	Domaln Name System, RFC 1035
GTPv2-C	GPRSTunneling Protocol ver2 Control Piane, 29.274
GTPvl-U	GPRS Tunneling Protocol User Piane, 29.281
HTTP	Hypertext Transfer Protocol, RFC 2616
IP	Internet Protocol, RFC 791
ISUP	(SS7) ISDN User Part, ITU-T Q.763
LI	(SS7) Layer 1 (unspeclfled)
M3UA	MTP3 User Adaptation Layer, RFC 4666
MEGACO	Media Gateway Control Protocol, ITU-T H.248
MTP2	(SS7) Message Transfer Part 2, ITU-T Q.703
MTP3	(SS7) Message Transfer Part 3, ITU-T Q.703
RTP	ReaFTime Transport Protocol, RFC 3550
SIĄP	SI Application Protocol, 36.413
SCTP	Stream Control Transmlsslon Protocol, RFC 4960
SIP	Session Initlatlon Protocol, RFC 3261
TCP	Transmlsslon Control Protocol, RFC 793
TDM	(PSTN) Time Divislon Multlplexing
UDP	User Datagram Protocol, RFC 768
Not Specłfled (proprłetary)

CjSI

BGCF (another network)

AS 23.228

If 009 I TF-PPP nrvi IMA RnforonrA w 1 A

M3UA

MEGACO

Interfaces LEGEND

LTE Traffic and Signaling User Traffic (indeterminate)

LTE Signaling IMS Media Piane IMS Session Control Piane IMS Media Control Service Control IMS Application Piane PSTN Signaling Charging Control

Virtual Interfaces (different colors)

23.228

MGCF

MGW

23.228

Acronyms and Nodes
AF	Application Function
AS	Application Server
BGCF	Breakout Gateway Control Function
CPE	Customer Premlse Equipment
DNS	Dorna i n Name System
ENUM	E.164 Number Mapplng
E-UTRAN	Evolved UTRAN
HSS	Home Subscriber Server
l-CSCF	Interrogating Cali Session Control Function
IMS	IP Multimedia Subsystem
ISC	IMS Service Control
MGCF	Media Gateway Control Function
MGW	Media Gateway
MME	Mobility Management Entity
MRFC	Media Resource Function Controller
MRFP	Media Resource Function Processor
OCS	Online Charging System
OFCS	Offline Charging System
PCEF	Policy and Charging Enforcement Function
PCRF	Policy and Charging Rules Function
P-CSCF	Proxy Cali Session Control Function
PDN	Packet Data Network
P-GW	PDN Gateway
PLMN	Public Land Mobile Network
PSTN	Public Switched Telephone Network
S-CSCF	Servlng Cali Session Control Function
SGW	Signaling Gateway
SCW	Serving Gateway
SPR	Subscription Profile Repository

3GPP Interfaces and Technlcal Specifications

Interface	Nodes	Technlcal Specifications
Cx	CSCF <-> HSS	29.228. 29.229
Gm	UE <-► P-CSCF	23.002, RFC 3261
Gx	PCEF «-* PCRF	29.212
Gy	PCEF <-» OCS	32.299
Gz	PCEF <-> OFCS	32.299
ISC	SCSCF<->AS	23.228
Mb	RTP-based Bearer	29.162, RFC 4867
Mg	MGCF <-> CSCF	23.002, RFC 3261
Mi	CSCF «-> BGCF	23.002, RFC 3261
Mj	BGCF ++ MGCF	23.002, RFC 3261
Mk	BGCF <-* BGCF	23.002, RFC 3261
Mn	MGCF <-► MGW	29.332, ITU-T H.248
Mp	MRFC <-> MRFP	29.333, ITU-T H.248
Mr	SCSCF MRFC	23.002, RFC 3261
Mw	l-CSCF, P-CSCF, S-CSCF	23.002, RFC 3261
Rx	AF ++ PCRF	29.214
Sl-MME	E-UTRAN (eNB) <-> MME	36.412, 36.413
Sl-U	E-UTRAN (eNB) <-► SCW	36.414, 29281
S5	S-GW <-> P-GW	29.274 (control piane) 29.281 (user piane)
S6a	MME<->HSS	29.272
SU	MME «-» S-GW	29.274
SGI	P-GW 4-> PDN	29.061
Sh	HSS «-► AS	29.328, 29.329
Sp	SPR «-» PCRF	23.203
ut	UE <-» AS	RFC 2616