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Frequency spectrum cooperation method of dynamic frequency hopping wireless area network

A wireless area network and spectrum technology, applied in the field of wireless communication systems, can solve the problem of overtime

Inactive Publication Date: 2008-10-29
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the effective time of CHC exceeds the maximum delay limit that the system can bear
[0011] Obviously, the collision avoidance solution based on the competition mechanism cannot perfectly solve the spectrum collision problem in the above two cases

Method used

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  • Frequency spectrum cooperation method of dynamic frequency hopping wireless area network
  • Frequency spectrum cooperation method of dynamic frequency hopping wireless area network
  • Frequency spectrum cooperation method of dynamic frequency hopping wireless area network

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Experimental program
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Embodiment Construction

[0024] Figure 4 In , there are two overlapping wireless area networks WRAN-A401 and WRAN-B402. At this time, WRAN-A 401 conducts spectrum detection and obtains that the CHB channel can be used as its frequency hopping target frequency band in the next cycle; in addition, WRAN-B 402 also detects that CHB channel can be used as its frequency hopping target frequency band in the next cycle. At this time, spectrum conflict occurs between WRAN-A401 and WRAN-B402.

[0025] Therefore, the core idea of ​​the present invention is to realize the sharing of idle frequency band CHB by two WRANs through signaling interaction between control centers of overlapping WRANs. Among them, WRAN-A401 occupies the frequency band CHB-par1 403; WRAN-B402 occupies the frequency band CHB-part2 404.

[0026] Figure 5 The division and sharing of frequency resources between WRAN-A501 and WRAN-B502 on the time-frequency coordinate curve is given. In the figure, channel CHB is divided into N sub-channe...

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Abstract

The invention discloses a spectrum cooperation method in a dynamic frequency hopping wireless regional area network, which comprises the steps that: all CPEs in the WRAN carry out spectrum detection and feed related idle channel information back to a respective control base station; spectrum resource distribution of the WRAN system under the state of spectrum collision is determined by high priority WRANs. The spectrum cooperation method of the invention is applied to solving the problem of spectrum collision among all overlapping WRANs based on dynamic frequency hopping, thereby effectively ensuring that all WRAN systems, when ensure respective QoS, effectively avoid serious problems of non-realization or relatively long delay of wireless access, etc. of adjacent WRANs caused by the shortage of free idle channels. Therefore, the communication quality and reliability in the coverage scope of the whole WRAN area are improved effectively by the same operator when integrating the whole spectrum resources.

Description

technical field [0001] The invention relates to the field of wireless communication systems based on cognitive radio, in particular to a spectrum cooperation method in a dynamic frequency hopping wireless area network. Background technique [0002] In the current communication protocols such as IEEE802.22, there is no regulation and explanation on how to effectively solve the spectrum collision between more than or equal to two overlapping WRAN systems by means of spectrum cooperation. [0003] In the WRAN system using cognitive radio technology, how to make full use of the limited free space frequency band for regional access communication is one of the current research hotspots in the field of wireless communication. [0004] Usually, when each client equipment (CPE: Consumer Premise Equipment) in the WRAN system performs in-band (In-band) spectrum detection, the access network needs to sacrifice a long communication time for the quiet period (Quiet period). Detection of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04L29/06H04B1/713H04J13/00
CPCH04B1/7143H04W16/10
Inventor 程锦霞梁宗闯
Owner BEIJING SAMSUNG TELECOM R&D CENT
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