COGNITIVE MULTI-USER OFDMA

摘要

A computing device operating according to a frequency division multiplexed protocol in which communication occurs over a signal formed from a plurality of sub-channels selected from anywhere in a frequency spectrum. A computing device may select sub-channels cognitively by using information about sub-channels previously deemed suitable or unsuitable by that computing device or other computing devices. A described technique for determining sub-channel suitability includes analyzing radio frequency energy in the sub-channel to detect signals generated by another computing device or high noise levels. Information may also be used. to cognitively select sub-channels to be analyzed, such as by first selecting for analysis previously-used sub-channels.

主权项

1. A system comprising a computing device of a plurality of computing devices, the computing device comprising at least one processor and at least one program module that are together configured for performing actions comprising:
detecting, by the computing device, interference on a selected sub-channel; waiting, by the computing device in response to the detecting, a period of time; checking, by the computing device after the waiting, the selected sub-channel for further interference; transmitting, by the computing device in response to the checking indicating that the selected sub-channel is clear, data via the selected sub-channel; and selecting, by the computing device in response to the checking indicating the further interference on the selected sub-channel, a different sub-channel.