Systems and methods for broadband wireless communication for mission critical internet of things (IOT)

A method for communication over a Point to Multipoint (PtMP) wireless communication system having a plurality of sectors, where each sector includes at least one base station and a plurality of remote stations, the method comprising:

• determining, by a processor, a total bandwidth for the PtMP wireless communication system, where the total bandwidth is:
• a) a frequency range of a continuous band allocated to the PtMP wireless communication system, or
• b) based on one or more PLMR channels when the PtMP wireless communication system communicates over a Private Land Mobile Radio (PLMR) band having one or more channels;
• partitioning, by the processor, the total bandwidth into a plurality of subchannels, wherein all subchannels have the same subchannel bandwidth;
• assigning, by the processor, each sector in the PtMP wireless system a subset of the plurality of subchannels to form a subchannel group, wherein each subchannel group comprises adjacent or non-adjacent sub-channels;
• creating, by the processor, a subchannel bit map for the plurality of subchannels;
• for each sector, by the processor, creating a populated subchannel bit map, wherein the populated subchannel bit map specifies an availability indicator which indicates whether each subchannel is available or not available for the particular sector;
• and
• communicating by the base station of at least one sector of the plurality of sectors to at least one of the plurality of remote stations over one of the subchannel groups configured in the sector and transmitting a preamble over a single subchannel of the subchannels of the respective at least one sector with a periodicity of a predetermined number of frames.