8Background

8 Background

(1) Fixed receivers operate under spectrum licences other than 2.5 GHz mid band gap spectrum licences. These include those operating in the 2.5 GHz band, used for WAS at the time this instrument was made. (2) Typically, the ACMA has not published documents setting out coordination requirements between radiocommunications devices operated under spectrum licences. It is necessary to look at the relevant spectrum licence technical framework for each band to determine system characteristics and coordination requirements. (3) The frequency band 2500 MHz to 2690 MHz has been divided into three bands, including the 2.5 GHz mid band gap. The 2.5 GHz lower band and the 2.5 GHz upper band exist either side of the 2.5 GHz mid band gap and constitute the 2.5 GHz band, and the spectrum licences for the 2.5 GHz band are paired to support FDD WAS. (4) WAS involves the deployment of a network of fixed transmitters, used as base stations, transmitting to lower power mobile user equipment, typically to provide access to a public data network. (5) The technical framework for the spectrum licences in the 2.5 GHz band is designed to support FDD services with fixed transmitters, used as base stations, transmitting in the 2.5 GHz upper band.