Light Cognitive Radio enabled inter operator Flexible Spectrum Usage for IMT-Advanced

In this paper we propose a mechanism to enable Flexible Spectrum Usage (FSU) in Local Area (LA) indoor deployment scenario of International Mobile Telecommunications-Advanced (IMT-A) with several operators in the given geographical area. The proposed scheme is referred to as policy assisted light Cognitive Radio (CR) enabled FSU, because it follows the CR cycle and considers policy as an important element to assist FSU. It facilitates allocation of spectrum from a common pool in flexible manner and ensures coexistence of several operators in the given geographical area on the shared spectrum. It also provides an autonomous, self adjustable and scalable solution for the emerging large scale indoor deployment of Home eNode-Bs (HeNBs).