Patent attributes
A common signaling channel (CSC) conveys signaling information units (SIUs) from a base station (BS) to each of a multiplicity (e.g., 1200) of different mobile stations (MSs). Implicit correspondence between particular CSC and data frames is facilitated by basing CSC frame duration on the data frame period. CSC frames are time multiplexed into K subframes, which are code division multiplexed (CDM) into J CDM branches to define J*K SIUs. CDM symbols (or sequences) representing each SIU may be diversely transmitted in different time slots, and/or using different OVSF codes or subchannels. Unique gain may be provided for each SIU. Subframe duration may ensure CDM code orthogonality despite fading. CDM symbol length may be an integer power of two, or have other values, such as 2N*20 (e.g., 80). SIUs are typically relevant to BS-MS data packets, for example ACKs supporting H-ARQ for reverse link transmissions.
