Patent ID: 7408917
Filing Date: 2008-08-05
Classification: H04B

Abstract:
1. A method in a base station of synchronizing a mobile station configured for receiving a sync channel message via a sync channel, the method comprising: first sending by the base station on the sync channel a first sync channel message specifying a first protocol of P_REV 5, the first sync channel message enabling synchronization to the base station by a first mobile station that requires a sync channel size of an IS-95B sync channel message; second sending, by the base station on a paging channel according to IS-2000 Rev. A, an extended system parameters message (ESPM) specifying availability of a second sync channel message utilizing a second protocol of P_REV 7, the extended system parameters message further specifying a broadcast control channel supported (BCCH_SUPPORTED) field, the extended system parameters message enabling a second mobile station, having synchronized to the base station according to the first protocol in response to the first sync channel message, to identify the availability of the second protocol as an alternative to the first protocol; and third sending by the base station on the sync channel second sync channel message specifying the second protocol of P_REV 7, enabling the second mobile station to change synchronization with the base station from the first protocol to the second protocol based on decoding the second sync channel message.