1. 3GPP2 Network Evolution: UMB->HRPD Handoff October 16, 2007 Qualcomm Inc. Contact: Jun Wang Notice Contributors grant a free, irrevocable license to 3GPP2 and its Organization 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 portions of the contribution; and at the Organization Partner’s sole discretion to permit others to reproduce in whole or in part such contributions or the resulting Organizational Partner’s standards publication. Contributors 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 the contributors 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 the contributors. Contributors specifically reserve the right to amend or modify the material contained herein and nothing herein shall be construed as conferring or offering licenses or rights with respect to any intellectual property of the contributors other than provided in the copyright statement above.

2. UMB-HRPD Handoff Scenarios Scenario 1: While the AT is in UMB, the AT has both PPP and TFT established with PDSN Scenario 2: While the AT is in UMB, the AT has no PPP and TFT established with PDSN –Scenario 2.1: AT needs to pre setup PPP and TFT while AT is in UMB (called Pre PPP Setup) Active Handoff for real time services –Scenario 2.2: AT can setup PPP and TFT after AT is handoff to UMB (Called Post PPP Setup) Active Handoff for best effort traffic Dormant handoff

3. Active handoff between UMB and HRPD for real time services Handoff for real-time IP applications (such as VoIP) when UMB coverage is not yet ubiquitous Desirable objectives: –Enable low interruption handoff between UMB and HRPD without requiring changes to deployed HRPD RANs and HRPD Core –Enable commonality: On Handoff from UMB to any technology (including HRPD) Between any technology handing off to HRPD, and On handoff from any Technology (including HRPD) to UMB

4. UMB to HRPD Active Handoff Overview Proposal in this presentation assumes that the AT can only transmit in a single technology (UMB/HRPD/1x) at any given time but may be able to monitor pilot from multiple technologies –Simultaneous transmission on multiple technologies increase cost/complexity of the ATs –Transmit power at the AT is also subjected to radiation safety regulation –Therefore, UMB needs to support tunneling of HRPD signaling messages in order to prepare for handoff to minimize interruption to real-time applications while the AT is in UMB The AT can acquire HRPD pilot by one of the following methods –Tune away mechanism specified in the UMB air interface –Using one of the Rx chains in a multiple Rx chain AT

5. Handoff Architecture

6. Alternative 1 CMIP Based Approach

7. MIP Optimization The AT can send MIP RRQ before step 12 (i.e., before leaving the UMB network). This allows MIP binding and air link HRPD connection setup to progress in parallel When the AT established HRPD connection, it sends another MIP RRQ This way the FL packets will be diverted to HRPD earlier

8. Alternative 2 PMIP Based Approach (Pre PPP Setup)

9. Alternative 2 PMIP Based Approach (Post PPP Setup)

10. Comparison between PMIP and CMIP Based Solution CMIP No standard changes No change to the existing PDSN in HRPD system No Change to the existing HA in HRPD system Same solution applies to pre PPP setup and post PPP setup from PDSN perspective Same solution applies to handoff from UMB to HRPD and from HRPD to UMB Same solution applies to different technologies handoff from core perspective –HRPD other Technologies –UMB other Technologies PMIP Need to upgrade A9/A11 Signaling Interfaces –Need to upgrade BSC, PCF, and PDSN to support the new signaling Need to upgrade PDSN for support of PMIP Need to upgrade HA or add LMA to support PMIP PMIP Triggers to pre-setup PPP and post-setup PPP is different PMIP Triggers for different directions (UMB-> HRPD and HRPD-> UMB) may be different

11. Dormant Handoff between HRPD and UMB Dormant Handoff: –From UMB to HRPD: No Difference from HRPD inter-PDSN dormant handoff. –From HRPD to UMB: No Difference from UMB inter-AGW idle handoff.

12. Conclusion No AGW-PDSN Interface is needed for UMB-HRPD handoff No PDS standard impact if CMIP is used If PMIP is used: –Need to upgrade A9/A11 Signaling interface Need to change HRPD AN, PCF, and PDSN –Need to upgrade HRPD PDSN to support PMIP If CMIP is used, the same solution can be used for both directions (HRPD to UMB handoff and UMB to HRPD handoff) If CMIP is used, the same solution can be used for handoff between UMB and other technology If CMIP is used, the same solution can be used for handoff between HRPD and other technology Recommend to adopt the concept