Method and apparatus for bandwidth request/grant protocols in a wireless communication system

Abstract

A method and apparatus for allocating bandwidth in a broadband wireless communication system is disclosed. One embodiment uses a self-correcting bandwidth request/grant protocol. The self-correcting bandwidth request/grant protocol utilizes a combination of incremental and aggregate bandwidth requests. CPEs primarily transmit incremental bandwidth requests to their associated base stations, followed by periodic transmissions of aggregate bandwidth requests. The use of periodic aggregate bandwidth requests (that express the current state of their respective connection queues) allows the bandwidth allocation method and apparatus to be “self-correcting”. Another embodiment utilizes an abridged bandwidth request/grant protocol to allocate bandwidth. The abridged bandwidth request/grant protocol system utilizes padding packets to request a reduction in bandwidth allocation to a CPE. A base station modem alerts a base station CPU when the BS modem receives a padding packet from a CPE. After alerting the BS CPU the method can reduce the associated CPE's bandwidth allocation.

1 . A base station, comprising:
 a back-haul interface configured to communicate with a communications hub that interfaces a wireless communication system with public network service providers via one or more wired communications;   an active antenna array configured to send and receive data in a first frame, the first frame comprised of N uplink time slots and M downlink time slots; and   the active antenna array further configured to send and receive data in a second frame, the second frame comprised of Y uplink time slots and Z downlink time slots, wherein N and Y are not equal, the first frame and the second frame having the same duration, and the numbers N, M, Y and Z adaptable based upon conditions.