This book targets the area of resource management and resource reconfiguration for interoperable heterogeneous wireless environments. It uses an innovative approach of merging classical teletraffic theory in cognitive radio systems capacity analysis in order to derive best reconfiguration strategies under different usage scenarios (i.e. different ratio primary/secondary users, different ratio of traffic demands of primary vs. secondary users etc.). Also, the book presents a pioneering work of the IEEE 802.21 standard implementation and its usage for provisioning flexible resource reconfiguration in heterogeneous wireless systems. It shows a newly developed resource management architectural framework capable of supporting increased service retention and service availability in heterogeneous wireless environments under different users' demands/constraints. Last, but not least, the book carefully analyzes the policy aspects of the emerging cognitive radio systems and showcases a practical operation of a laboratory prototype specifically designed and developed for this purpose.