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IS-2000 Release A Sync Channel Problem Resolution Motorola Nokia

IS-2000 Release A Sync Channel Problem Resolution Motorola Nokia. 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

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IS-2000 Release A Sync Channel Problem Resolution Motorola Nokia

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  1. IS-2000 Release A Sync Channel Problem Resolution Motorola Nokia 1

  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 2

  3. 3GPP2 SC Guidance(SC-20020124-027r4) 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 3

  4. 3GPP2 SC Guidance(SC-20020124-027r4) 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) 4

  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. 5

  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 6

  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 7

  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: 8

  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. 9

  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. 10

  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. 11

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