Reference Points Flashcards
E-UTRAN Uu
UE to eNB
Control Plane
NAS EMM | NAS ESM
RRC
User Plane
IP
Packet Data Convergence Protocol (PDCP)
S1-U
eNB to SGW
User plane traffic
Protocol: GTPv1-U
S1-MME
eNB to MME
Control Plane Traffic
(Protocol: Non-Access Stratum (NAS) EPS Mobility Management (EMM). Used for mobility control.
OR
Protocol: NAS EPS Session Management ESM. Used for session control)
AND
Protocol: S1 Application Protocol (S1AP). Used for E-RAB management, transfer of UE context information, NAS signaling transport, paging, and EPC based mobility.
X2
eNB to eNB
Control and user plane
Control Protocol: X2AP
User Protocol: GTPv1-U
S3
MME to SGSN
Protocol: GTPv2-C
S4
SGW to SGSN
Control and user plane
Control Protocol: GTPv2-C
User Protocol: GTPv1-U
S5
SGW to PGW
Control and User Plane
User protocol: GTPv1-U. Used to tunnel user data.
Control protocol: GTPv2-C Used to establish and tear down PDP bearers
S6a
MME to HSS
Control Plane
Protocol: Diameter
S6b
PGW to AAA
Control Plane Diameter
S10
MME to MME
Control plane used for inter MME handovers and transfer of historical subscriber data.
Protocol: GTPv2-C
S11
SGW to MME
Control Plane used for setting up bearers
User Plane used for IoT Optimizations
Control Protocol: GTPv2-C
User Protocol: GTPv1-U
S12
SGW to RNC
User Plane GTPv1-U
S13
MME to EIR
Diameter
SGs
MME to MSS
Control Plane used for circuit switched fall back (CSFB)
Protocol: SGsAP
SXa
SGW-C to SGW-U
Used in CUPS so the SGW-C can control the SGW-U
Protocol: Packet Forwarding Control Protocol (PFCP)
