Radio system and operating method of the same

摘要

A radio system is provided. The radio system comprises primary devices, secondary devices, cognitive radio base stations and a data fusion center. The primary devices are licensed to use communication channels. The secondary devices acquire sensing reports of received signal strength, location and channel information of the primary devices. The cognitive radio base stations receive the sensing reports generated by the secondary devices through a control channel. The data fusion center receives the sensing reports from the cognitive radio base stations through a backbone network and performs a cooperative spectrum sensing process on the sensing reports to obtain primary device information with respect to the number, spectrum distribution and coverage area of the primary devices, wherein the primary device information is accessible by the secondary devices such that the secondary devices select one of the communication channels according to the primary device information to perform communications.

主权项

1. A radio system, comprising:
a plurality of primary devices are licensed to access a plurality of communication channels, wherein the communication channels comprises a plurality of data channels for data transmission; a plurality of secondary devices for acquiring sensing reports of received signal strength, channel information of the primary devices and locations where the received signal strength are collected; a plurality of cognitive radio base stations for receiving the sensing reports generated by the secondary devices through a control channel, wherein the control channel is different from the data channels, and the secondary devices and the cognitive radio base stations are unauthorized users to the data channels; and a data fusion center for receiving the sensing reports from the cognitive radio base stations through a backbone network and for performing a cooperative spectrum sensing process on the sensing reports to obtain primary device information with respect to the number, locations, spectrum distribution and coverage area of the primary devices, wherein the primary device information is accessible by the secondary devices such that the secondary devices select one of the communication channels according to the primary device information to perform communications; wherein all processing of the sensing reports of the received signal strength and channel information of the primary devices and locations where the received signal strength are collected is performed by the data fusion center, and the secondary devices only acquires the sensing reports of the primary devices; and wherein the receiving signal strength of the primary devices for which the secondary devices acquire sensing reports is a measurement of a power present in a signal strength received by the secondary devices.