The present document specifies the stage 3 of the Evolved Packet System S101and S121 reference points between the MME and the HRPD Access Network. The S101 interface supports procedures for Pre-Registration, Session Maintenance and Active handoffs between E-UTRAN and HRPD networks. The S121 interface supports procedures for RIM information exchange between the MME and the HRPD Access Network.
It also specifies the S103 interface between the Serving GW and HSGW. This User Plane interface is used to forward DL data to minimize packet losses in mobility from E-UTRAN to HRPD. Signalling procedures on the S101 interface are used to set up tunnels on the S103 interface.
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
: "Vocabulary for 3GPP Specifications".
: "Architecture enhancements for non-3GPP accesses".
"Generic Routing Encapsulation (GRE)".
"Key and Sequence Number Extensions to GRE".
: "Evolved GPRS Tunnelling Protocol for Control Plane (GTPv2-C); Stage 3".
3GPP2 C.S0024-B: "cdma2000 High Rate Packet Data Air Interface Specification".
3GPP2 C.S0087-0 v2.0: "E-UTRAN - HRPD and CDMA2000 1x Connectivity and Interworking: Air Interface Aspects".
: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3".
: "3GPP System Architecture Evolution: Security Architecture".
: "Evolved Universal Terrestrial Radio Access (E-UTRA) ; S1 Application Protocol (S1AP)".
: " Mobile radio interface Layer 3 specification; Core network protocols; Stage 3".
: "3GPP EPS Sv interface (MME to MSC) for SRVCC".
: "General Packet Radio Service (GPRS); Base Station System (BSS) - Serving GPRS Support Node (SGSN); BSS GPRS protocol (BSSGP)".
For the purposes of the present document, the terms and definitions given in TR 21.905
and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905
Combination of the eAN - PCF of the cdma2000 access
For the purposes of the present document, the abbreviations given in TR 21.905
and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905
enhanced Node B
Enhanced UMTS Terrestial Radio Access Network
Generic Routing Encapsulation
High Rate Packet Data
HRPD Serving GateWay
International Mobile Station Identity
Mobility Management Entity
Packet Control Function
Packet data Network
Proxy Mobile IP
RAN Information Management
Tunnel End Point Identifier
User Datagram Protocol
The S101 and S121 reference points are defined between the MME and the HRPD access, enabling interactions between E-UTRAN Access and cdma2000 HRPD Access. The S101 interface is required to perform procedures related to optimise HO from the E-UTRAN Access to cdma2000 HRPD Access to allow for pre-registration and handover signalling with the target system. The S121 interface is required to perform procedures related to RIM information exchange between the E-UTRAN Access and cdma2000 HRPD Access.
The S103 interface is defined between the Serving GW and HSGW and supports the forwarding of DL data during mobility from E-UTRAN to HRPD. Signalling procedures on the S101 interface are used to set up tunnels on the S103 interface.
The requirements for these interfaces are defined in TS 23.402
The protocol stack used for the S101 and S121 interfaces shall be based on GTPv2-C, see TS 29.274
The UDP header and port numbers definitions shall be as defined in GTPv2-C, see TS 29.274, clause 4.2.1
The IP header and IP addresses definitions shall be as defined in GTPv2-C, see TS 29.274, clause 4.2.2
Layer 1 and Layer 2 requirements shall as defined in GTPv2-C, see TS 29.274, clause 4.2.3
and TS 29.274, clause 4.2.4
Transmission Order and Bit Definitions shall be as defined in GTPv2-C, see TS 29.274, clause 4.3