Method and device for acquiring control channel resources in cognitive radio

Abstract

The invention discloses a method and device for acquiring control channel resources from cognitive radio. The method comprises the steps of: performing spectrum detection on each spectrum void by a secondary subscriber, and judging whether a signal in the form of the secondary subscriber is existent or not on each spectrum void; if the signal is existent on the spectrum void, performing clock synchronization by an emitting party and a receiving party, and if the signal is not existent on the spectrum void, establishing a channel establishing frame by the emitting party according to the clock of the emitting party to enable the receiving party and the emitting party to perform clock synchronization; judging whether an idle conventional frame emitting sub-frame is existent or not on the spectrum void of the emitting party by the emitting party; if so, performing information interaction by the emitting party and the receiving party through the idle conventional frame sub-frame; determining a spectrum void number to be used by the control channel by the emitting party utilizing available spectrum void numbers of the emitting party and the receiving party, and determining a conventional frame sub-frame sequence number to be used; and transmitting the spectrum void number and the conventional frame sub-frame sequence number to the receiving party by the emitting party to enable the receiving party and the emitting party to transmit control information.

Description

technical field [0001] The present invention relates to the technical field of cognitive radio, and in particular, relates to a method and a device for acquiring control channel resources in cognitive radio. Background technique [0002] According to the frequency resources used, the control channel of cognitive radio can be divided into two types: a newly applied licensed frequency band and unlicensed spectrum holes detected by users. At present, most of the research adopts the second method, and the design difficulties of the cognitive radio control channel of the second method are briefly introduced below. [0003] The same function as the control channel of other wireless systems, the control channel of cognitive radio is also responsible for connecting the slave users in the system to establish the connection of the communication network, and further control the transmission of business data. Therefore, it is required that the control channel should be maintained for a ...

AI Technical Summary

Problems solved by technology

However, this type of scheme does not solve the following three problems: First, how to realize the synchronization of the first pair of slave users at the beginning of the establishment of the slave system. The existing research is based on the premise that some slave users have been synchronized. The proposed scheme There is a lack of solutions to this problem; second, it cannot solve the problem of control channel conflicts, because the order of selecting spectrum holes is pre-designed, and users cannot choose other spectrum holes to avoid conflicts; third, there is a lack of control channel resource utilization Quantification, most studies assume that the spectrum hole corresponds to the slave transmitter one-to-one, and the rest of the research assumes that the same spectrum hole can accommodate any number of slave users, but this is unrealistic

[0008] To sum up, the existing cognitive radio control channel design cannot guarantee the real-time reliability of the control channel

The aforementioned synchronous hypothetical scheme is more difficult to implement, while the non-synchronous hypothetical scheme lacks a complete set of solutions from the establishment of the system to the stable operation of the entire system

In addition, neither the synchronization assumption scheme nor the non-synchronization assumption scheme considers how to minimize the amount of spectrum holes occupied by the control channel

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