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 wireless cellular mobile unit operable to communicate with a base station in a broadband wireless communication system, the wireless cellular mobile unit comprising:
a transceiver operable to
register the wireless cellular mobile unit with the base station, achieve uplink synchronization with the base station, and establish communication between the wireless cellular mobile unit and the base station,transmit an explicit message to the base station requesting to be provided an allocation of uplink (UL) bandwidth in which to transmit a bandwidth request,receive the allocation of UL bandwidth,transmit the bandwidth request within the allocation of UL bandwidth, the bandwidth request indicative of the required amount of UL bandwidth, andreceive an UL bandwidth grant in response to the bandwidth request; and a processor having a Media Access Controller (MAC) operable to
maintain a plurality of queues with data awaiting transmission to the base station, the data pertaining to one or more UL connections with similar quality of service (QoS), andallocate the UL bandwidth grant to the one or more UL connections based on QoS priority.