Methods and systems for transmission of multiple modulated signals over wireless networks

摘要

A method and apparatus for requesting and allocating bandwidth in a broadband wireless communication system. The method and apparatus includes a combination of techniques that allow a plurality of CPEs to communicate their bandwidth request messages to respective base stations. One technique includes a “polling” method whereby a base station polls CPEs individually or in groups and allocates bandwidth specifically for the purpose of allowing the CPEs to respond with bandwidth requests. The polling of the CPEs by the base station may be in response to a CPE setting a “poll-me bit” or, alternatively, it may be periodic. Another technique comprises “piggybacking” bandwidth requests on bandwidth already allocated to a CPE. Currently active CPEs request bandwidth using unused portions of uplink bandwidth that is already allocated to the CPE. The CPE is responsible for distributing the allocated uplink bandwidth in a manner that accommodates the services provided by the CPE.

主权项

1. A method of operating a wireless cellular mobile unit in a bandwidth on demand wireless cellular communication system having a plurality of wireless cellular mobile units and a base station, the method comprising:
the wireless cellular mobile unit registering with the base station and achieving uplink synchronization with the base station for enabling communication between the wireless cellular mobile unit and the base station; queuing data pertaining to at least one user application into a logical data queue of one or more logical data queues; transmitting from the wireless cellular mobile unit an explicit message to the base station to inform the base station that the wireless cellular mobile unit has data awaiting transmission to the base station; receiving from the base station a transmission opportunity for the wireless cellular mobile unit to inform the base station of an indication of an amount of data awaiting transmission to the base station in the logical data queue; subsequent to reception of the transmission opportunity, transmitting to the base station the indication of an amount of data awaiting transmission in the logical data queue; and subsequent to transmitting the indication of an amount of data awaiting transmission in the logical data queue, receiving an uplink (UL) transmission grant for the wireless cellular mobile unit.