Patent ID: 7486643
Filing Date: 2009-02-03
Classification: H04L

Abstract:
1. A method of providing broadcast and multicast service (BCMCS) indication in a CDMA communication system without adding new channels while retaining compatibility between BCMCS indication enabled stations and non-enabled (legacy) stations, the method comprising: a) selecting a quick paging channel (QPCH) employed in legacy stations to direct signaling messages to individual receiving stations by means of preassigned time division multiplexing (TDM) slots; b) determining a TDM slot of the selected channel for messages directed to a particular mobile station (MS) that is intended to receive a BCMCS Indication; and c) phase modulating a message transmitted in the determined TDM slot such that processing the received signal in a legacy receiving station as on-off keying will not detect the message.