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 base station to allocate transmission resources to a plurality of wireless cellular mobile units in a bandwidth on demand communication system, the method comprising:
receiving an explicit message from a wireless cellular mobile unit informing the base station that the wireless cellular mobile unit has data awaiting transmission; subsequent to receiving the explicit message, providing to the wireless cellular mobile unit 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; receiving the indication of an amount of data awaiting transmission to the base station subsequent to providing the transmission opportunity, the data awaiting transmission to the base station associated with a logical data queue of one or more logical data queues at the wireless cellular mobile unit; providing to the wireless cellular mobile unit an uplink transmission grant for use by the wireless cellular mobile unit, the wireless cellular mobile unit determining how to allocate the uplink transmission grant to one or more applications with data awaiting transmission to the base station; and receiving uplink data from the wireless cellular mobile unit according to the uplink transmission grant, the uplink data pertaining to the one or more applications.