A method and device for spectrum switching based on cognitive radio

Abstract

The embodiment of the invention provides a spectrum handover method and equipment based on cognitive radio, relates to the field of communication, and aims to realize quick handover of base stations in the spectrum handover process to avoid disruption of user services. The method comprises the following steps: obtaining spectrum handover information after a base station determines to perform spectrum handover, using a BBU (Base Band Unit) to send the spectrum handover information to a remoter radio unit (RRU) of the base station through a CPRI (Common Public Radio Interface), and using the RRU to send the spectrum handover information to a terminal to enable the terminal to be handed over to a spectrum corresponding to an identification of a target spectrum from a current work spectrum according to a spectrum handover time. The method is applied to spectrum hand over.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for spectrum switching based on cognitive radio. Background technique [0002] CR (Cognitive Radio, Cognitive Radio) technology is the most promising technology to solve the current shortage of spectrum resources. The current spectrum usage policy is fixed allocation, that is, the government allocates fixed resources for specific services of specific users, such as television, radio, radar, navigation, etc., all use fixed spectrum, some of which are not used all the time, so there are some Part of the spectrum is not fully used in time periods and certain geographical locations, and currently a large amount of spectrum is not fully used in the fixedly allocated spectrum, which causes a great waste of spectrum resources. By sensing the wireless spectrum environment, cognitive radio can discover these unoccupied spectrums that appear anytime and anywhere, and ...

AI Technical Summary

Problems solved by technology

[0003] In the existing spectrum switching based on cognitive radio scenarios, after the base station determines to perform spectrum switching, it sends the obtained spectrum switching information to the terminal through the BBU (Base band Unit, baseband processing unit), and the BBU will obtain the In the process of sending the spectrum switching information to the terminal, the BBU needs to send the spectrum switching information from the high layer (application layer) to the bottom layer (physical layer) through high layer signaling (application layer), and finally pass the spectrum switching information through the air interface of the physical layer. The handover information is sent to the terminal. Since the time from the high-level instruction issued by the high-level (application layer) to the physical layer receiving the high-level signaling is uncertain, it will cause a delay in the transmission of the spectrum switching information, resulting in spectrum switching. In this way, the base station cannot perform spectrum switching in time, which will cause interruption of user services and reduce user experience

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