Patent ID: 8666421

Claim:
An Open Wireless Architecture (OWA) spectrum sensing method for secondary user of spectrum in cognitive radio networks, said method comprising selection of sensing node, configuration for location of each said sensing node, sensing frame for control of sensing process, and division of sensing region, wherein configuration of said sensing node is based on node selection and node location in different divided small sensing areas, and implementation of said sensing process is based on both sensing scheduling and spectrum signal sensing, and wherein priority for said selection of sensing node is divided into fourth levels, each denoted by two bits, f2 and f3 in said sensing frame, and for each said secondary user, active or idle condition is represented by letting f2 be 1 or 0 respectively, and delay-sensitive or non-delay-sensitive service is denoted by making f3 be 1 or 0 respectively, so that each said secondary user can be in one of four conditions, 00, 01, 10 and 11 that are first, second, third and fourth priority level respectively, wherein said selection of sensing node is completed based on joint consideration of current user condition (active or idle) and type of service (delay-sensitive or non-delay-sensitive) to select each said sensing node before sensing task is started.