Content for TS 23.401 Word version: 19.0.0

1… 4… 4.2.2… 4.3… 4.3.6… 4.3.8… 4.3.12… 4.3.16… 4.3.20… 4.3.25… 4.4… 4.6… 4.7… 5… 5.1.2… 5.3… 5.3.2… 5.3.3… 5.3.3.2 5.3.3.3… 5.3.4… 5.3.4B… 5.3.5… 5.3.8… 5.3.9… 5.4… 5.4.4… 5.5… 5.5.1.2… 5.5.2… 5.5.2.2… 5.5.2.3… 5.5.2.4… 5.6… 5.7.3… 5.7A… 5.10 5.11… 5.19… D… D.3… D.3.4 D.3.5 D.3.6 D.3.7… D.3.8… E F… J… K… L… M…

5.1 Control and user planes 5.1.0 General 5.1.1 Control Plane
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5 Functional description and information flows p. 126

5.1 Control and user planes p. 126

5.1.0 General |R9| p. 126

5.1.1 Control Plane p. 126

5.1.1.1 General p. 126

The control plane consists of protocols for control and support of the user plane functions:

controlling the E-UTRA network access connections, such as attaching to and detaching from E-UTRAN;
controlling the attributes of an established network access connection, such as activation of an IP address;
controlling the routing path of an established network connection in order to support user mobility; and
controlling the assignment of network resources to meet changing user demands.

The following control planes are used in E-UTRAN mode.

5.1.1.2 eNodeB - MME p. 126

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.2-1: Control Plane for S1-MME Interface

Figure 5.1.1.2-1: Control Plane for S1-MME Interface

Legend:

S1 Application Protocol (S1-AP): Application Layer Protocol between the eNodeB and the MME.
Stream Control Transmission Protocol (SCTP): This protocol guarantees delivery of signalling messages between MME and eNodeB (S1). SCTP is defined in RFC 4960.

5.1.1.3 UE - MME p. 127

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.3-1: Control Plane UE - MME

Figure 5.1.1.3-1: Control Plane UE - MME

Legend:

NAS: The NAS protocol supports mobility management functionality and user plane bearer activation, modification and deactivation. It is also responsible of ciphering and integrity protection of NAS signalling.
LTE-Uu: The radio protocol of E-UTRAN between the UE and the eNodeB is specified in TS 36.300.

5.1.1.4 SGSN - MME p. 127

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.4-1: Control Plane for S3 Interface

Figure 5.1.1.4-1: Control Plane for S3 Interface

Legend:

GPRS Tunnelling Protocol for the control plane (GTP-C): This protocol tunnels signalling messages between SGSN and MME (S3).
User Datagram Protocol (UDP): This protocol transfers signalling messages. UDP is defined in RFC 768.

5.1.1.5 SGSN - S-GW p. 128

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.5-1: Control Plane for S4 interface

Figure 5.1.1.5-1: Control Plane for S4 interface

Legend:

GPRS Tunnelling Protocol for the control plane (GTP-C): This protocol tunnels signalling messages between SGSN and S-GW (S4).
User Datagram Protocol (UDP): This protocol transfers signalling messages. UDP is defined in RFC 768.

5.1.1.6 S-GW - P-GW p. 128

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.6-1: Control Plane for S5 and S8 interfaces

Figure 5.1.1.6-1: Control Plane for S5 and S8 interfaces

Legend:

GPRS Tunnelling Protocol for the control plane (GTP-C): This protocol tunnels signalling messages between S-GW and P-GW (S5 or S8).
User Datagram Protocol (UDP): This protocol transfers signalling messages between S-GW and P-GW. UDP is defined in RFC 768.

5.1.1.7 MME - MME p. 129

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.7-1: Control Plane for S10 interface

Figure 5.1.1.7-1: Control Plane for S10 interface

Legend:

GPRS Tunnelling Protocol for the control plane (GTP-C): This protocol tunnels signalling messages between MMEs (S10).
User Datagram Protocol (UDP): This protocol transfers signalling messages between MMEs. UDP is defined in RFC 768.

5.1.1.8 MME - S-GW p. 129

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.8-1: Control Plane for S11 interface

Figure 5.1.1.8-1: Control Plane for S11 interface

Legend:

GPRS Tunnelling Protocol for the control plane (GTP-C): This protocol tunnels signalling messages between MME and S-GW (S11).
User Datagram Protocol (UDP): This protocol transfers signalling messages. UDP is defined in RFC 768.

5.1.1.9 MME - HSS p. 130

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.9-1: Control Plane for S6a interface

Figure 5.1.1.9-1: Control Plane for S6a interface

Legend:

Diameter: This protocol supports transferring of subscription and authentication data for authenticating/authorizing user access to the evolved system between MME and HSS (S6a). Diameter is defined in RFC 3588.
Stream Control Transmission Protocol (SCTP): This protocol transfers signalling messages. SCTP is defined in RFC 4960.

5.1.1.10 MME - EIR p. 130

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.10-1: Control Plane for S13 interface

Figure 5.1.1.10-1: Control Plane for S13 interface

Legend:

Diameter: This protocol supports UE identity check procedure between MME and EIR (S13). Diameter is defined in RFC 3588.
Stream Control Transmission Protocol (SCTP): This protocol transfers signalling messages. SCTP is defined in RFC 4960].

5.1.1.11 Void

5.1.1.12 MME - CSS |R11| p. 131

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.12-1: Control Plane for S7a interface

Figure 5.1.1.12-1: Control Plane for S7a interface

Legend:

Diameter: This protocol supports transferring of CSG subscription data for roaming subscribers only between MME and CSS (S7a). Diameter is defined in RFC 3588.
Stream Control Transmission Protocol (SCTP): This protocol transfers signalling messages. SCTP is defined in RFC 4960.

5.1.1.13 MME - RCAF |R13| p. 131

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.13-1: Control Plane for Nq interface

Figure 5.1.1.13-1: Control Plane for Nq interface

Legend:

Nq-AP: This application layer protocol supports the IMSI and APN retrieval procedure between the RCAF and the MME.
Stream Control Transmission Protocol (SCTP): This protocol transfers signalling messages. SCTP is defined in RFC 4960.