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 requesting uplink (UL) bandwidth in a bandwidth on demand communication system, the method comprising, at a wireless cellular mobile unit:
registering the wireless communication radio unit with a base station in the wireless communication system and achieving uplink synchronization with the base station for enabling communication between the wireless subscriber radio unit and the base station; queuing data pertaining to one or more user applications into priority queues based on the quality of service (QoS) of the data; transmitting from the wireless cellular mobile unit an explicit message to the base station informing the base station that the wireless cellular mobile unit has data awaiting transmission; receiving at the wireless cellular mobile unit a bandwidth request opportunity to allow the wireless communication radio unit to respond with a bandwidth request; and transmitting from the wireless cellular mobile unit the bandwidth request, the bandwidth request being indicative of a pending amount of UL data associated with a priority queue at the wireless cellular mobile unit.