Patent ID: 9413500
Filing Date: 2016-08-09
CPC Classification: H04B,H04J,H04L,H04W

Claim Text:
1. A method of implementing frequency division duplex (FDD), the method comprising: assessing spectrum usage for uplink (UL) and downlink (DL) based on spectrum usage information, wherein the spectrum usage information includes quality of service requirements; determining availability of spectrum based on sensing; detecting a presence of a primary user on an available whitespace spectrum on a condition that the primary user is using a previously available whitespace spectrum; dynamically allocating the UL spectrum and the DL spectrum from the spectrum around a transmission by the primary user in a previously available unlicensed spectrum in view of spectrum usage assessment and spectrum availability with a variable spacing between the UL spectrum and the DL spectrum; and maintaining communication between a base station and at least one wireless transmit/receive unit by avoiding interference with the transmission by the primary user.