1. ABSTRACT: This contribution proposes the HRPD-WiMAX handoff solution. TITLE: HRPD-WiMAX Handoff TSG-A WG4 RECOMMENDATION: Review and Adopt Samsung Electronics grant a free, irrevocable license to 3GPP2 and its Organizational Partners to incorporate text or other copyrightable material contained in the contribution and any modifications thereof in the creation of 3GPP2 publications; to copyright and sell in Organizational Partner's name any Organizational Partner's standards publication even though it may include all or portions of this contribution; and at the Organizational Partner's sole discretion to permit others to reproduce in whole or in part such contribution or the resulting Organizational Partner's standards publication. Samsung Electronics are also willing to grant licenses under such contributor copyrights to third parties on reasonable, non-discriminatory terms and conditions for purpose of practicing an Organizational Partner’s standard which incorporates this contribution. This document has been prepared by Samsung Electronics to assist the development of specifications by 3GPP2. It is proposed to the Committee as a basis for discussion and is not to be construed as a binding proposal on Samsung Electronics. Samsung Electronics specifically reserves the right to amend or modify the material contained herein and to any intellectual property of Samsung Electronics other than provided in the copyright statement above. DATE: November 5, 2007 Notice SOURCE: Samsung : Bill Semper and BeomSik Bae b.semper@samsung.com, bsbae@samsung.comb.semper@samsung.combsbae@samsung.com

2. 1 Overview Basic Principles High Level Architecture Issues

3. 2 Principles Single radio operation –Dual radio operation should be supported, but is not mentioned in this material. Support bi-directional handoff Support for active handoff for real-time service (such as VoIP) –To maximize handoff performance, session setup (e.g. HRPD session, PPP setup, and CMIP/PMIP binding update) should occur before handoff commences HRPD-WiMAX handoff solution may impact existing infrastructure as little as possible –Minimum change of legacy HRPD networks. –IOS signaling interfaces should be used as much as possible Minimal impact on terminal complexity

4. High Level Architecture (based on A.S0008) PDSN AN (SC/MM) HA/LMA BS PCF ASN-GW HRPD RAN WiMAX ASN A10/A11 AAA WiMAX CSN 3GPP2 CN R6 R3 AN* (SC/MM) AN (SC/MM) AN-AAA A8/A9 A16 A8/A9 A12 (IP) IP Connectivity BS* R6 (IP) AN* - may be proxy AN or enhanced AN BS* - may be proxy BS or enhanced BS

5. A8/A9 A14/A20 High Level Architecture (based on A.S0009) PDSN AN HA/LMA BS PCF (SC/MM) ASN-GW HRPD RAN WiMAX ASN A10/A11 AAA WiMAX CSN 3GPP2 CN R6 R3 AN* AN AN-AAA A8/A9 A16 A12 IP Connectivity (IP) BS* (IP) BS* - may be proxy BS or enhanced BS AN* - may be proxy AN or enhanced AN

6. Protocol Stack (AT in WiMAX Network) AT to AN* Signaling Tunneling Protocol TCP/UDP IP CS WiMAX L1/L2 CS WiMAX L1/L2 R6 L1/L2 Tunneling Protocol TCP/UDP IP L1/L2 R3 R6 L1/L2 R3 L1/L2 AT WiMAX BS ASN GTWCSN AN* L1/L2 HRPD CN Security Connection Session Stream Application Security Connection Session Stream Application L1/L2 HRPD RAN Edge Router

7. Protocol Stack (AT in WiMAX Network) AN* to AT Signaling Tunneling Protocol TCP/UDP IP CS WiMAX L1/L2 CS WiMAX L1/L2 R6 L1/L2 Tunneling Protocol TCP/UDP IP L1/L2 R3 R6 L1/L2 R3 L1/L2 AT WiMAX BS ASN GTWCSN AN* L1/L2 HRPD CN Security Connection Session Stream Application Security Connection Session Stream Application L1/L2 HA L1/L2 HRPD RAN Edge Router

8. Protocol Stack (AT in HRPD Network) AT to BS* Signaling WiMAX Signaling Tunneling Protocol TCP/UDP IP HRPD AT PPP RLP HRPD RLP L1/L2 A10 L1/L2 A10 PPP L1/L2 AN/PCF PDSN L1/L2 HRPD CN CSN ASN Edge Router BS* L1/L2 R6 Tunneling Protocol TCP/UDP IP WiMAX Signaling L1/L2

9. Protocol Stack (AT in HRPD Network) BS* to AT Signaling WiMAX Signaling Tunneling Protocol TCP/UDP IP HRPD AT PPP RLP HRPD RLP L1/L2 A10 L1/L2 A10 PPP L1/L2 AN/PCF PDSN L1/L2 HRPD CN CSN ASN Edge Router BS* Tunneling Protocol TCP/UDP IP WiMAX Signaling L1/L2 HA L1/L2

10. Issues CMIP to PMIP handover needs to be studied –PMIP on the WiMAX side Timing of MIP change is still being looked at –Probably only two choices; before or after air interface HO Where is standardization done? –Not many impacts to TSG-A –Only TSG-X? –Where is Tunneling Protocol defined?

11. Next Steps Samsung will be bringing more detailed call flows to the Hollywood meeting –CMIP/CMIP and CMIP/PMIP We would like to see a skeleton document agreed to so we can begin to bring contributions against it –TSG-A impact may be small –Skeleton documents are being brought to both TSG-A and TSG- X