This standard provides definitions and explanations of key concepts in the fields of spectrum management, spectrum trading. cognitive radio, dynamic spectrum. access, policy-based defined radio_ systems- adaptive radie, software-defined radio， and related advanced radio system technologies. The document goes beyond simple, short definitions by providing amplifying text that explains these terms in the context of the technologies that use them. The documen t also describes how these technologies interrelate and create new capabilities while at the same time providing mechanisms supportive of new spectrum management paradigms such a dymamie speetrum eese.
