A wireless communication system, comprising: a first transceiver positioned at a base station unit and a second transceiver positioned at a user location remote from the base station unit, wherein the first and second transceivers communicate over a radio frequency air link permitting both uplink transmissions from the user location to the base station unit and downlink transmissions from the base station unit to the user location, that utilize orthogonal frequency division multiplexing (OFDM) modulation, between the first and second transceivers, and wherein the downlink transmission comprises a message packet that fully occupies an allocated downlink slot and the uplink transmission comprises a message packet that does not fully occupy an allocated uplink slot.
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