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Distributed spectrum sensing system and method in wireless communication system

A wireless communication system and spectrum sensing technology, applied in the field of distributed spectrum sensing systems, can solve problems such as reducing the available channels of the WRAN system

Active Publication Date: 2009-07-22
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
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Problems solved by technology

From another point of view, any local false alarm causes global false alarm, resulting in UCL in CSF, which reduces the available channels in WRAN system

Method used

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  • Distributed spectrum sensing system and method in wireless communication system
  • Distributed spectrum sensing system and method in wireless communication system
  • Distributed spectrum sensing system and method in wireless communication system

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with preferred embodiments.

[0026] figure 2 is a block diagram showing the structure of the distributed spectrum sensing system to which the present invention is applied. It has been described above, and only the application of the present invention in this system will be described in detail below.

[0027] According to the present invention, the confidence measure as output of SSF can be used in distributed sensing method to improve the reliability of ACL and UCL in CSF. A global trust measure is obtained by averaging trust measures collected from distributed SSFs. If the absolute value of the global metric is greater than a threshold (preset in the CSF), the spectrum sensing is considered reliable and ACL and UCL can be generated safely. If the absolute value of the global material is less than the threshold, the CSF will discard the sensing report or request another sensing cycle. With the ...

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Abstract

The present invention provides a distributed frequency spectrum sensing system in wireless communication system. The distributed frequency spectrum comprises the following components: a plurality of frequency spectrum sensing functional units which are used for respectively generating a plurality of frequency spectrum sensing outputs that have respective trust degree measures and transmitting the plurality of frequency spectrum sensing outputs to the channel selection functional unit; and the channel selection functional unit which is used for generating the available channel list and unavailable channel list according to the plurality of frequency spectrum sensing outputs which are transmitted from the plurality of frequency spectrum sensing functional lists and have respective trust degree measures.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a distributed spectrum sensing system and method in a wireless communication system, which can reduce the possibility of false detection and generate a list of available channels and a list of unavailable channels in a more reliable manner . Background technique [0002] In an IEEE 802.22 WRAN (Wireless Area Network) system, protection of existing users is a prerequisite. Reliable spectrum sensing ensures that the WRAN system does not cause harmful interference to existing users. Therefore, spectrum sensing is one of the most important tasks in WRAN systems. [0003] Spectrum sensing is the process of observing the RF (radio frequency) spectrum of a television channel to determine whether that channel is usable by a WRAN. The processing is divided into two parts: Spectrum Sensing Function (SSF) and Channel Selection Function (CSF). The base station and all CPEs (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00H04W84/12
Inventor 杨峰邱吉刚徐斌阳
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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