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Content for  TS 23.401  Word version:  17.3.0

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5  Functional description and information flowsWord‑p. 120

5.1  Control and user planesWord‑p. 120

5.1.0  General |R9|Word‑p. 120

5.1.1  Control PlaneWord‑p. 120

5.1.1.1  GeneralWord‑p. 120

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.
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5.1.1.2  eNodeB - MMEWord‑p. 120

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.2-1: Control Plane for S1-MME Interface
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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 - MMEWord‑p. 121

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.3-1: Control Plane UE - MME
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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 - MMEWord‑p. 121

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.4-1: Control Plane for S3 Interface
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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-GWWord‑p. 122

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.5-1: Control Plane for S4 interface
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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-GWWord‑p. 122

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.6-1: Control Plane for S5 and S8 interfaces
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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 - MMEWord‑p. 123

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.7-1: Control Plane for S10 interface
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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-GWWord‑p. 123

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.8-1: Control Plane for S11 interface
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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 - HSSWord‑p. 124

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.9-1: Control Plane for S6a interface
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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.
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5.1.1.10  MME - EIRWord‑p. 124

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

5.1.1.11Void

5.1.1.12  MME - CSS |R11|Word‑p. 125

Reproduction of 3GPP TS 23.401, Fig. 5.1.1.12-1: Control Plane for S7a interface
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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|Word‑p. 125

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

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