A Frequency-Domain Based Cognitive Radio Cooperative Sensing and Spectrum Competition Method
A cognitive radio and cooperative sensing technology, applied in the field of frequency domain-based cognitive radio cooperative sensing and spectrum competition, can solve the problem of ineffective reduction of control signal system overhead, without consideration of distributed cognitive radio network, without consideration of coordination Detection process and other issues, to achieve the effect of improving sensitivity and timeliness, saving competition time, and improving spectrum utilization
Active Publication Date: 2015-08-19
GUANGZHOU HKUST FOK YING TUNG RES INST
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However, this method does not consider distributed cognitive radio networks, so it is not suitable for distributed networks lacking base stations
This method also does not consider the cooperative detection process, so it cannot effectively reduce the system overhead of the control signal
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[0029] like figure 1 As shown, when distributed cognitive radio adopts cooperative spectrum detection, each secondary user must perform independent spectrum sensing first. Then use the reporting channel for result exchange and fusion. The reporting channel is generally a pre-specified specific channel used by all secondary users. After the results are fused, the secondary user performs spectrum according to their own transmission requirements and transmits on the available data channel.
[0030] like figure 2 As shown, the traditional distributed cognitive radio network will perform cooperative detection and spectrum competition serially in the time domain. Secondary users first perform independent spectrum detection, and after obtaining detection results, secondary users use pre-allocated time slots to exchange detection results, and organize and fuse them in other time slots. After multiple rounds of exchanges, secondary users compete for the available spectrum accordin...
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The invention relates to a cognitive radio transmission mode of collaborative detection and frequency spectrum competing based on frequency domain. The cognitive radio transmission mode aims at solving the problem that a large number of frequency spectrum resources are occupied by control information transmission in cognitive radio networks, and accordingly frequency spectrum utilization rate is reduced. The cognitive radio transmission mode is based on the orthogonal frequency-division multiplexing (OFDM) modulating technology, starts with a physical layer of a wireless local area network, overlays two control procedures of collaborative detection and frequency spectrum competing which are mutually independent and unrelated on the frequency domain by utilizing the multi-carrier characteristics on the frequency domain of the OFDM modulating technology, so that the two procedures can be parallelly performed at the same time, and time and bandwidth occupied by transmitting control information are greatly reduced. By means of the parallel control of the frequency domain, the time required by signal exchanging and transmission in traditional time domain serial control is greatly reduced, data signal transmission time is increased, frequency spectrum utilization rate is improved, and network throughput is increased.
Description
technical field [0001] The invention relates to a frequency-domain-based cooperative detection and spectrum competition mode, which is used to solve the problem of reducing spectrum utilization by occupying a large amount of spectrum resources due to control information transmission in a cognitive radio network. This method can allocate the traditional serial cooperative detection and spectrum competition to the frequency domain in parallel, thus greatly reducing the time occupied by the two control processes of the spectrum, improving the utilization of the spectrum, and increasing the total throughput of the network. Background technique [0002] With the development of wireless communication technology, the number of wireless users has increased sharply, and wireless spectrum resources have become more and more scarce. How to fully improve the utilization of wireless spectrum has become a technical problem that needs to be solved urgently. Especially with the development ...
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IPC IPC(8): H04W16/10H04W16/14H04W24/10
Inventor 王璐陈瑞良伍楷舜倪明选
Owner GUANGZHOU HKUST FOK YING TUNG RES INST