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Motorola Ballot Comment #10

Motorola Ballot Comment #10. Addresses a bug in the Release A standard – 3 fields omitted from an overhead message In original Release A, TD & 3X related information was added to overhead messages: Transmit Diversity (TD) fields were included in Extended CDMA Channel List Message (ECCLM)

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Motorola Ballot Comment #10

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  1. Motorola Ballot Comment #10 • Addresses a bug in the Release A standard – 3 fields omitted from an overhead message • In original Release A, TD & 3X related information was added to overhead messages: • Transmit Diversity (TD) fields were included in Extended CDMA Channel List Message (ECCLM) • 3X fields were included in MC-RR Parameters Message (MCRRPM). • information sent on the BCCH only (not PCH) • Reason for adding the information: • Support channel hashing based on mobile/base capabilities (i.e. after idle handoff) • For TD, some fields were omitted and so the feature is broken (3X is OK).

  2. Frequency Transitions in IS-2000-A ECCLM = Extended CDMA Channel List Message MCRRPM = MC-RR Parameters Message SCHM = Sync Channel Message Arrows indicate allowed transitions: Supported in IS-2000-A Broken in IS-2000-A Note: No direct transitions from PCH (FREQ # 1 or 2) to BCCH, TD, or 3X (FREQ 3,4,5,6,7) are allowed. This is the “Sync Channel Issue” CCLM ECCLM, TD_INCL=0 MCRRPM, 3X_INCL=1 ECCLM, TD_INCL=??? MCRRPM, 3X_INCL=1 ECCLM, TD_INCL=0 MCRRPM, 3X_INCL=0 ECCLM, TD_INCL=0 FREQ # 1 PCH only (IS95/1X) FREQ # 3 BCCH only FREQ # 5 TD only FREQ # 7 3X only 30 or 31 octets 26 octets (IS95), or 28 octets (1X) FREQ # 2 PCH only (IS95/1X) FREQ # 4 BCCH only FREQ # 6 TD only SCHM SCHM SYSTEM DETERMINATION SUBSTATE

  3. Conclusion • BCCH code rate, data rate, and walsh code for TD must be added to BCCH-version of ECCLM • Without this fix, TD_INCL will likely never be set to ‘1’ in the ECCLM, and the fields currently associated with TD_INCL will not be used. The feature is broken. • Unrelated to “Sync Channel Issue”: • Does not help 28-octet problem in any way, since fields not added to PCH-version of ECCLM (a must to resolve the “Sync Channel Issue”). • This feature requires BS to send Release-A (PREV=7) SCHM • This feature can be used to minimize the length of the SCHM to 30 or 31 octets. This is a new application of an existing feature (i.e. not the original intent of the feature).

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