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Cluster-based cooperative spectrum sensing in cognitive radio systems

A cognitive radio, cognitive user technology, applied in the field of cluster-based cooperative spectrum sensing in cognitive radio systems

Active Publication Date: 2010-06-30
LINGNA HLDG PTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above deficiencies of current designs are merely intended to provide an overview of some of the problems with current designs and are not intended to be exhaustive

Method used

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  • Cluster-based cooperative spectrum sensing in cognitive radio systems
  • Cluster-based cooperative spectrum sensing in cognitive radio systems
  • Cluster-based cooperative spectrum sensing in cognitive radio systems

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Embodiment Construction

[0022] As mentioned in the background, in a cognitive radio system, secondary users can be coordinated to perform collaborative spectrum sensing to more accurately detect primary users. However, sensing performance can be severely degraded when sensing observations are forwarded to common receivers over fading channels. According to various non-limiting embodiments, a cluster-based collaborative spectrum sensing method is provided to improve overall sensing performance for cognitive users.

[0023] By dividing secondary users into several clusters and selecting the favorite users in each cluster to report to a common receiver, the cluster-based cooperative spectrum sensing method develops user selection diversity to enhance sensing performance. Embodiments include, but are not limited to, the use of decision fusion and energy fusion techniques. As the results show, in fact, the present invention significantly improves the sensing performance compared to conventional spectrum ...

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Abstract

Cluster-based cooperative spectrum sensing is provided for cognitive radio systems. For each cluster of cognitive users, a cluster head is determined. Each cluster head collects energies of a reporting channel measured by the cognitive users within the cluster and decides whether a primary user is absent from a given spectrum. A common receiver then aggregates the cluster-level decisions made by the cluster heads, and makes a decision across multiple, or all of, the clusters whether the primary user is absent based on a fusion function of the cluster-level decisions. If the primary (licensed)user is absent, then secondary (unlicensed) users may utilize the spectrum.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Application Serial No. 60 / 913,483, filed April 23, 2007, entitled "CLUSTER-BASEDCOOPERATIVE SPECTRUM SENSING IN COGNITIVE RADIO SYSTEMS" right, which is hereby incorporated by reference in its entirety. technical field [0003] The subject disclosure relates to collaborative spectrum sensing by secondary users of a cognitive radio system via a cluster-based methodology. Background technique [0004] As a brief background, cognitive radio is a paradigm for wireless communication in which a network or wireless node alters its transmit or receive parameters to communicate efficiently without interfering with licensed users . This parameter change is based on actively monitoring several factors in the external and internal radio environment, such as the radio spectrum, user behavior and network status. [0005] In cognitive radio systems, unlicensed (secondary) users ...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04W16/14H04W84/18
CPCH04W84/18H04W16/14
Inventor 孙春华张伟卡里德·本利泰夫
Owner LINGNA HLDG PTE