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 bandwidth for 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 pertaining to a user application awaiting transmission; providing to the wireless cellular mobile unit a bandwidth request opportunity; receiving a bandwidth request responsive to the bandwidth request opportunity, the bandwidth request being indicative of a pending amount of UL data associated with a priority queue of one or more priority queues established at the wireless cellular mobile unit; providing to the wireless cellular mobile unit an UL bandwidth grant; and receiving UL data transmitted from the wireless cellular mobile unit within the UL bandwidth grant, the UL data pertaining to one or more user applications.