1 Methods to Handle the Motorola/Nokia Sync Channel Problem for cdma2000 Revision A Common Channel Deployments Single Carrier Solution 6 August 2002 Qualcomm Incorporated

2 Previous Proposal If the EGSRM (Extended Global Service Redirection Message) sent on the Paging Channel –Contains P_REV 7 –Contains the BAND_CLASS and Frequency for the channel that the mobile station is using Then the mobile station performs a special behavior Two variants –Method called 1A: has the MS wait on Sync Channel to receive P_REV 7 SCHM –Method called 2A: has the MS use a set of “canned” BCCH parameters (data rate, code rate, Walsh channel) Concern was expressed that all P_REV 7 MSs would be required to support this method to avoid looping

3 An Improved Trigger Definition If the EGSRM (Extended Global Service Redirection Message) sent on the Paging Channel –Contains P_REV 255 Then the MS performs the special behavior Benefits  Avoids the problematic timing issues associated with Method 1  Avoids having to modify the Sync Channel data stream with Method 2  Does not require all mobiles to implement the work around

4 Timing Diagram Single Carrier (Method 2A) IS95B SCH: F1 Sync Chan PCH Non-TD BCCH Rel-A with work around (1, 2) 1 2 Standard IS-95B SCH Rel-A without work around (1) Canned parameters BCCH rate: 4800 Code rate: Rate ½ Walsh code: 33, 64 space IS-95/Rev 0 (1)

5 Timing Diagram Multi-Carrier (Method 2A) IS2000A IS95B SCH: F1 Sync Chan PCH 1 F2 Sync Chan Non-TD BCCH 2 IS2000A F3 Sync Chan Non-TD BCCH ECCLM 3 Rel-A with work around (1, 2, 3) Rel-A without work around (1) IS-95/Rev 0 (1)