Control Channel Establishment Method in Cognitive Radio Network

Abstract

The invention discloses a method for establishing a control channel in a cognitive radio network. The method for establishing the control channel in the cognitive radio network comprises the access ofan available channel, the exchange of the control information and the establishment of a data transmission channel. The method for establishing the control channel in the cognitive radio network comprises the following steps: perceiving an available frequency band of an unauthorized user and the density information of the frequency band first before the unauthorized user performs the establishment of the control channel; then accessing the available channel according to the channel jump sequence; opening the channel competition mode when the data is to be transmitted; sending a RTS packet frame with the available channel and the channel density information after the channel competition is successful; and determining the data transmission channel between the unauthorized user and the destination node according to the public available channel and the density information when the destination node receives the RTS packet frame. The invention effectively solves the problem of the low efficiency of frequency utilization caused by the uneven distribution of the unauthorized users in the traditional cognitive radio networks; in addition, the control channel is separated from the data transmission channel in the method for establishing the control channel in the cognitive radio network, therefore, the opportunity to try to establish the control channel can be increased.

Description

technical field [0001] The invention belongs to the technical field of radio networks, and in particular relates to a method for establishing a control channel in a cognitive radio network in a cognitive radio network. Background technique [0002] The concept of cognitive radio is proposed to solve the problem of scarcity of radio spectrum resources. Currently, the radio frequency spectrum is allocated in a fixed manner and is divided into licensed spectrum and unlicensed spectrum. Since the use of unlicensed spectrum does not require the authorization of the corresponding agency, it has been widely used commercially. With the rapid development of smart devices in recent years and the rapid increase of radio equipment and applications in the commercial field, communications on unlicensed frequency bands have become extremely crowded. In order to solve this problem, cognitive radio technology envisages allowing unlicensed users to dynamically use the licensed spectrum with...

AI Technical Summary

Problems solved by technology

[0014] In view of the above problems, the present invention proposes a method for establishing a control channel in a cognitive radio network, which considers the competition between multiple unlicensed users for the same frequency band during the establishment of the control channel. In this method, the control channel and the data transmission channel It can be different channels. After the control channel is established, the data transmission channel is selected by the unlicensed users through the transmission of control information and the density of the channel, which solves the uneven distribution of unlicensed users and the control channel in the existing control channel establishment method. The same channel as the data transmission channel; in addition, the non-authorized user in this method adopts the real-time monitoring mode, which avoids the failure of the control channel establishment caused by the fact that the non-authorized user is both the sender and the receiver

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