To transmit overhead information for broadcast and multicast services in a
system that utilizes multiple radio technologies, time slots used for
OFDM in a super-frame are initially ascertained. Overhead information for
multiple streams to be sent in the time slots used for OFDM is generated.
The overhead information conveys the time slots and the coding and
modulation used for the streams and may be given in various forms.
Multiple records may be formed for the overhead information for the
streams. The overhead information for the streams is processed and time
division multiplexed with the data for the streams in the super-frame.
Information indicating the time slots used for OFDM in the super-frame
may be sent separately or included in the overhead information. An
indicator may also be appended to each stream to indicate whether there
is any change in the overhead information for the stream in the next
super-frame.