What is License-Exempt WiMAX?
Wireless spectrum is a controlled asset in almost every country and allocated under license to selected operators – typically at very high cost to the operator. To stimulate growth of broadband wireless, regulators in many countries permit operation in bands not occupied by licensed operators. In some cases, operators are required to register for operation – receiving a “license” to operate. In other cases no registration is required. However in all cases, operation is on a non-exclusive basis. There are four sub bands in 5 GHz range typically used for license-exempt operation globally. In the US, operators may register for operation in the 3.65 GHz band. Operation on a non-exclusive basis raises the probability of interference and difficulties finding clear spectrum. License-Exempt WiMAX refers to the use of WiMAX technology to deliver broadband services in these non-exclusive bands. Some WiMAX systems employ leading edge interference mitigation and spectrum management techniques over
