A Cognitive Wireless Network Access Method Based on Common Control Channel

Abstract

The invention discloses a cognitive wireless network access method based on a common control channel. The method can be divided into a channel competition process, a channel reservation process and adata transmission process. Wherein the channel competition process is mainly that cognitive users compete for authorization channel use rights on a public control channel in a distributed mode, the channel reservation process is a link of information confirmation between cognitive user receiving and transmitting node pairs, and the data transmission process is a process of tuning the cognitive user receiving and transmitting node pairs to an authorization channel for data transmission. The method is aimed at reducing channel bandwidth wasted by cognitive users due to the fact that waiting authorization channels are idle and conflicts between the cognitive users and main users through an improved binary exponential backoff algorithm, a four-handshake mechanism and a main user priority classification mechanism, and service quality guarantee of the users is improved as much as possible while network saturation throughput performance is improved. A simulation result in an EXata network simulation environment proves the effectiveness of the protocol.

Description

technical field [0001] The invention belongs to the field of cognitive wireless networks, in particular to a method for accessing a cognitive wireless network based on a common control channel. Background technique [0002] With the rapid development of modern wireless communication technology and the wide application of wireless network equipment, people's demand for spectrum resources is increasing. For example, the application of mobile Internet technology allows people to access the Internet anytime and anywhere to obtain the latest information; the application of Internet of Things technology enables all kinds of electronic and electrical equipment to realize network interconnection around the clock, providing more convenient and intelligent life for human beings. services; the rapid development of drones and unmanned vehicles allows people to see the dawn of smart life. Behind all these technologies, the protection of spectrum resources is inseparable. It is foreseea...

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Problems solved by technology

[0003] However, according to the findings of the Federal Communications Commission of the United States, human beings have uneven utilization of spectrum resources

On the one hand, unlicensed spectrum resources, such as the 2.4Ghz and 5Ghz frequency bands that are free for industry, science, and medical treatment, have already become crowded due to the access of a large number of wireless devices; on the other hand, licensed spectrum resources vary in time and space. There are different degrees of idle spectrum resources in the world, that is, the phenomenon of spectrum holes. The survey results show that the comprehensive utilization rate of authorized spectrum resources is between 15% and 85%, and the utilization rate of spectrum resources is very low.

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