Energy-efficient cooperative spectrum sensing method

• Main Authors: XIE XIUKUN, YAO CHENG, TANG YIBIN, ZHU CHANGPING, SHAN MINGLEI, GAO YUAN
• Format: Patent
• Language: English
• Published: 07.10.2015
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION; WIRELESS COMMUNICATIONS NETWORKS

The invention discloses an energy-efficient cooperative spectrum sensing method. Dual energy thresholds are arranged in the spectrum sensing method, and the number of perceiving users participating in sensing is saved through two rounds of screening. Firstly, N perceiving users perform sensing anticipation on a main user, then M users of which the energy values are out of the two thresholds are selected to perform sensing continuously, and the rest N-M perceiving users enter the dormancy state so as to save sensing energy consumption. In the second phase, S perceiving users of which the cumulative energy values are less than the first threshold are selected and sensing results are transmitted to a fusion center without a common control channel. The rest M-S perceiving users enter the dormancy state, and the fusion center tacitly approves that the sensing results of the M-S perceiving units are that the main user exists. Sensing energy consumption of the system is saved by the method of reducing the number of the users participating in sensing under the condition of ensuring spectrum sensing performance.