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TS 29.276 (CT4)
Optimized Handover Procedures and Protocols
between E-UTRAN Access
and cdma2000 HRPD Access –
Stage 3

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use "3GPP‑Page" to get the Word version
use "ETSI‑search" to get the PDF version
for a better overview, the Table of Contents (ToC) is reproduced
V15.0.0 (PDF)  2018/06  27 p.
V14.0.0  2017/03  27 p.
V13.0.0  2015/12  27 p.
V12.3.0  2015/01  27 p.
V11.0.0  2012/09  23 p.
V10.3.0  2011/12  23 p.
V9.5.0  2011/06  23 p.
V8.7.0  2011/06  22 p.

Rapporteur:  Mr. Landais, Bruno
See also:

This TS specifies the stage 3 of the Evolved Packet System S101 and 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 (RAN Information Management) 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.