1. Adding LTE-1x CSFB IOS specification in 3GPP2 Sources: China Telecom, Contact: Li Wenyi (liwenyi@gsta.com) ABSTRACT: This contribution is to analyze the reason that adding the CSFB IOS specification. Recommendation: Review and approve The contributing companies 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. The contributing companies 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 contributing companies to assist in 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 contributors. The contributing companies specifically reserve the right to amend or modify the material contained herein and to any intellectual property of contributors other than provided in the copyright statement above.

2. Background LTE-1x CSFB specifications (TS 23.272,TS 29.277) have been finished in 3GPP, include R8 1xCSFB and R9 e1xCSFB. There is no impact to the 1x core network in the specification. LTE-1x CSFB air interface specification will be published soon in 3GPP2(C.S0097). Interface S102 and IWS entity refer to 3GPP2 HRPD IOS specification:A.S0008. GCSNA over A21 has added into A.S0008-C v3.0.

3. Issues LTE-1x IWK is different from HRPD-1x IWK –Entities different LTE-1x IWK involves eNB,MME,IWS HRPD-1x IWK involves AN,IWS –Interfaces and protocols different LTE-1x involves S102,GCSNA HRPD-1x involves A21,CSNA –Flows different LTE-1x uses GCSNA flows HRPD-1x uses CSNA flows

4. Suggestion Complete the full LTE-1x solutions in 3GPP2 including IOS specification as soon as possible There are two options –Option 1: Adding a standalone LTE-1x CSFB IOS specification as that of A.S0022. If Option 1 is chosen, GCSNA over A21 should be moved from next version of A.S0008. More integrated and independent for CSFB solution Need to change reference specification in 3GPP –Option 2: Adding LTE-1x CSFB related descriptions and flows in next version of A.S0008. Simplify the work Which option is better?