Dual polling media access control protocol for packet data in fixed wireless communication systems

Abstract

An apparatus, method and system are illustrated which provide a media access control polling protocol, using two types of polls, for packet data transmission in the uplink direction, in fixed wireless communication systems. The preferred system embodiment includes a plurality of subscriber units having transceivers for wireless communication, a base station having a transceiver for wireless communication with the plurality of subscriber units, and a data interface unit (DIU) operatively coupled to the base station through a network access controller. The DIU transmits a first poll, which authorizes transmission of a first predetermined amount of data, referred to as a standard allocation, for prompt throughput of small messages, such as acknowledgements. For subscriber units having additional data for transmission, the DIU transmits a second poll on a distinct or separate subchannel, which authorizes transmission of a second predetermined amount of data, referred to as an extended allocation, for transmission of larger blocks of data which are less delay-sensitive. In addition, power measurement is performed on all poll responses, to allow for transmission power level changes prior to and during data transmission, for greater data throughput.