1 IS-2000 Release A Sync Channel Problem Resolution MotorolaNokia

2 Outline Review of 3GPP2 Steering Committee (SC) Guidance Reason for Standards-based Solution Proposed Solution –Overview of 3GPP2 TSG-C Actions –Overview of Technical Solution Impacts to Deployed Equipment Impacts to Release A Mobiles Impacts to Release A Networks

3 3GPP2 SC Guidance (SC r4) Resolution of the Sync Channel issue shall: Maintain a single specification Be available by March 15 if a specification change is required Approach: TSG-C to release – without sync channel fix – Release A Addendum 2 and Release B during Seattle meeting (Feb 4 – 8) Establish an Ad Hoc Group in SC to find solution SC Ad Hoc Group to identify solution and agree by consensus SC Ad Hoc Group shall submit the agreed solution to TSG-C for approval

4 3GPP2 SC Guidance (SC r4) Ad Hoc Group Requirements: Single specification such that a Release A mobile is interoperable with Release A and prior standards compliant infrastructure Resolve the Sync Channel Issue such that there is no impact to currently deployed equipment (BS & MS)

5 Reason for Standards-based Solution Fundamental aspects of problem: “28 Octet” problem requires infrastructure to transmit an IS-95 Sync Channel Message since IS-2000 Sync Channel Message is too long. IS-95 Sync Channel Message can only direct a mobile to a Paging Channel. Cannot direct it to BCCH/F-CCCH (new common channels introduced in Release A). There is no information on the Paging Channel to direct Release A mobiles to a BCCH/F-CCCH. Therefore, a standards-based solution is needed to address this issue.

6 Proposed Solution Motorola proposes the following course of action, consistent with SC guidance, to resolve the Sync Channel Issue: Publish Release A, Addendum 2 and Release B during the Seattle TSG-C meeting (Feb 4 – 8) without inclusion of the sync channel fix Create Release A, Addendum 3 to address the sync channel problem This addresses the “single specification” requirement of the SC

7 Overview of Technical Solution New fields added to the end of the existing Extended CDMA Channel List Message on the Paging Channel. –This is the minimum standards addition necessary to fix the sync channel problem. –Release A base stations optionally include the extra fields. If fields not included, then no impact to the BS. –Release A mobiles compliant to Addendum 3 must be able to process these fields. –No explicit statement of a Release A base station transmitting an IS-95 Sync Channel Message – this is handled outside of the standard –This addition does not cause any compatibility or performance issues in existing infrastructure or mobile equipment and is necessary to ensure a Release A mobile is interoperable with deployed networks per SC guidance. Leverages work done by TSG-C WG2

8 Overview of Technical Solution Release A Addendum 3 Fix. Inclusion of the following fields at the end of the Extended CDMA Channel List Message (ECCLM) when sent on the Paging Channel:

9 Impacts to Deployed Equipment No impacts to already deployed mobiles –ECCLM did not exist in IS-95 – no impacts to IS-95 mobiles. –Per the standard, Release 0 mobiles will ignore additional fields at end of ECCLM defined in Release A Addenda for sync channel fix. No impacts to already deployed networks –ECCLM did not exist in IS-95 – network will not transmit ECCLM. –Release 0 network will not transmit additional fields at end of ECCLM as defined in Release A Addenda for sync channel fix. Therefore, IS-95 and IS-2000 Release 0 mobiles not impacted by fix, and do not have roaming issues related to fix.

10 Impacts to Release A Base Stations Release A Addendum 3 (A3) base station required to support at least 1 new bit -- NON_TD_SEL_INCL field. –If operator does not deploys sync channel fix, this bit set to ‘0’ and no additional fields required. –If operator deploys sync channel fix, this bit set to ‘1’ and additional fields are included in ECCLM.

11 Impacts to Release A Mobiles Release A Addendum 3 (A3) mobile required to process new fields defined in Addendum 3 A3 mobiles can roam into any (A3, Release 0, IS- 95) network However, A2 mobiles, if they exist, may not obtain all Release A features if operating in an A3 network that has the fix deployed. –REASON: A2 mobile will ignore the additional fields being sent by the A3 base station, and will therefore not be redirected to the Release A capable frequency.