Patent ID: 9124476
Filing Date: 2015-09-01
Classification: H04L,H04W

Abstract:
1. A method of transmitting user data within a communication band, over a local area network (LAN), comprising: identifying in the communication band a whitespace band available in an area of operation of the LAN; generating a baseband WiFi orthogonal frequency division multiplexing (OFDM) signal from user data; reconfiguring the baseband WiFi OFDM signal into a modified WiFi OFDM signal using a transmit spectrum mask that defines the bandwidth of the modified WiFi OFDM signal in the whitespace band and attenuates the modified WiFi OFDM signal at the edges of the whitespace band for maintaining a performance of any neighboring licensed primary service, wherein the bandwidth of the modified WiFi OFDM signal is based at least in part on whether the whitespace band is in a first portion of the communication band or not in the first portion; and transmitting the modified WiFi OFDM signal over the whitespace band.