Asymmetric TDD in flexible use spectrum

A method, comprising:

• sending a first signal over an asymmetric time division duplex (TDD) communication path via a first portion of a first frequency band, the first frequency band being adjacent to a second frequency band and a third frequency band, the first frequency band being different from the second frequency band and the third frequency band, the second frequency band including a frequency division duplex (FDD) communication path, the third frequency band including a TDD communication path;
• AND
• receiving a second signal over the asymmetric TDD communication path via a second portion of the first frequency band different from the first portion of the first frequency band;
• wherein the FDD communication path in the second frequency band is an FDD downlink path;
• wherein the second portion of the first frequency band is adjacent to the second frequency band and the first portion of the first frequency band is separated from the second frequency band by a predetermined guard band.