This invention belongs to a classification of service quality Broad Band wireless access network technology, its characteristics is that the service is divided into five categories and increase of variable-length packet, variable bit rate, real-time services fluctuations gentle flow; The sub-stations and base stations are made a detailed functional breakdown, the business services is established by admission control module to accept or reject IP layers; reading bandwidth allocation module with a wide range of services requested bandwidth connections with the quality of service parameters and distribution system available bandwidth, different sub-stations authorized obtained the total bandwidth; using uplink and downlink scheduling of the total bandwidth in accordance with its mandate and the necessary bandwidth, by service Priority service connecting the various dispatching through lower physical layer interface to send the media access control layer of data and control information. Not only satisfy a wide range of services connecting service quality requirements, but also take into account the unexpected increase in the data, increased fairness between sub-station and inter-connecting different priority-class service.