1 Notice VIA Telecom and QUALCOMM Incorporated grants 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. The 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. The 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. Chicago, IL, USA C Title:Harmonized Proposal on 1x Rev. F R-EACH Enhancements Abstract:This contribution summarizes the harmonized proposal from VIA and Qualcomm on the enhancements for 1x Rev. F R-EACH channel Source:Shu Wang Jing Sun Date:4/16/2012 Recommendation:Review and Adopt

Outline  This contribution summarizes the harmonized proposal from VIA and Qualcomm on enhancements of 1x Rev. F R-EACH channel  It replaces C R2  The proposal includes  Low Rate R-EACH Frames  Selective ACK for R-EACH  Both are strictly backward compatible.  And both are software upgradable with no hardware change necessary. 2

Low Rate R-EACH Frames  Low-rate frames are for link budget limited mobiles.  Three new rates are added for Rel. F R-EACH frames.  All of them have a frame length of 20ms.  They are based on RC3 ½, ¼, and ⅛ rate frame structures. At 4.8kbps, 2.7kbps, and 1.2kbps rates With 10 bytes, 5 bytes, and 2 bytes payload sizes respectively  Base station needs to broadcast its capability supporting this feature or not. A new field in GAPM will be added.  Strictly backward compatible. 3

Selective ACK for R-EACH  It targets RoT reduction.  necessary when R-EACH loading is high. ( e.g. when DoS is extensively used. )  The existing mechanism is to send ACK after the whole R-EACH access probe is successfully decoded by base station.  Selective ACK is to individually ACK successfully decoded R-EACH frames within each access probe.  After mobile decodes this new ACK message from F-PCH, it will transmit not- ACK’ed frames in the next access probe. The next access probe will be shorter and more efficient. Base station needs to stitch all frames together later after successfully receive them from possible multiple access probes.  The selective ACK message will be scheduled with low priority. If it cannot be transmitted in time, it will be dropped If it cannot be transmitted, mobile will retransmit the entire probe  A new message will be added on F-PCH for selective ACK and a new capability field will be added for Rel. F mobile 4