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A method, device and system for sensing channels

A communication device and channel technology, applied in the field of communication, can solve the problems of reducing the reliability of perception results and interference of authorized users, and achieve the effect of shortening the silent period, avoiding synchronization interference and adjacent frequency interference, and improving the reliability of perception

Inactive Publication Date: 2008-03-26
HUAWEI TECH CO LTD
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Problems solved by technology

[0011] In this way, the out-of-band sensing of the N+Δ channel by CR system A in the non-uniform silent period cannot avoid the occurrence of co-channel interference or / and adjacent channel interference, thereby reducing the reliability of the obtained sensing results and causing further damage to the Authorized User Interference

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  • A method, device and system for sensing channels
  • A method, device and system for sensing channels
  • A method, device and system for sensing channels

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Embodiment Construction

[0033] In the embodiment of the present invention, in order to reduce the number of silent periods set when the cognitive (CR) system performs in-band sensing, and reduce the same-channel interference and adjacent-channel interference generated when the CR system performs out-of-band sensing, the CR system The base station divides at least one sub-area from its own coverage area according to preset conditions; and sets an execution period for each sub-area, and instructs the selected user terminal to sense the designated channel within the corresponding execution period.

[0034] When the base station in the CR system needs to perform in-band sensing on the current working channel and its adjacent channels (including N channel, N-1 channel and N+1 channel), the base station confirms that the The physical location of the user terminal, and attribute the user terminals with close physical locations to the same sub-area, then determine the number of user terminals contained in eac...

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Abstract

A method for apperceiving channels includs: a base station divides at least one subregion from a self covering area according to the preset condition; the base station arranges the executing period for each subregion, and directs the selected user terminal to apperceive the appointed channel in the relevant executing period. So, when the base station apperceives in bands, the times of the uniform silent period set by the base station is reduced, the total time of the silent period is shortened, so the serving quality of the CR system is improved, when the base station of the CR system apperceives out of the band, the synchronization disturbance and the neighbour frequency disturbance are avoided, so the apperceive reliability to the accredited user of the CR system is improvrd effectively, so the disturbance of the accredited user is reduced. At the same time, a communication device and a communication system are disclosed.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method, device and system for sensing channels. Background technique [0002] At present, radio resources are increasingly scarce, and the spectrum utilization rate of authorized frequency bands is not high. Therefore, cognitive radio technology has attracted more and more attention in academia and industry. Cognitive Radio (CR) technology is a technology that efficiently and flexibly allocates spectrum holes to unlicensed users without interfering with licensed users. Channels in the segment that are not occupied by authorized users. [0003] The system using CR technology is called the cognitive system (CR system). The CR system has the ability to sense (Sensing) the channel. The so-called sensing (Sensing) is to obtain the signal strength, signal type, and channel occupancy of the channel through the detection of the channel. Status and other physical parameters to de...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04Q7/30H04B7/26H04W16/14H04W16/32H04W72/14
Inventor 刘劲楠冯淑兰
Owner HUAWEI TECH CO LTD
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