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Media access control method based on separation of cognitive and source sensing nodes in CRSNs

A technology of media access control and node separation, applied in transmission monitoring, transmission system, network topology, etc., can solve problems such as loss of value and market application prospects, and achieve the effects of extending network life cycle, balancing energy consumption, and improving throughput

Active Publication Date: 2016-05-25
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

If the problem of high-cost deployment of CRSN is not resolved, CRSN positioned at low cost and low power consumption will lose its existence value and market application prospects

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  • Media access control method based on separation of cognitive and source sensing nodes in CRSNs
  • Media access control method based on separation of cognitive and source sensing nodes in CRSNs
  • Media access control method based on separation of cognitive and source sensing nodes in CRSNs

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Embodiment Construction

[0045] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] In view of the shortcomings of the existing CRSN network, the method of the present invention firstly separates the cognitive function of the CRSN node into another node, that is, forms a network in which two types of nodes coexist in the same WSN, that is, a CRSN of heterogeneous nodes; In this network, cognitive nodes are responsible for spectrum sensing, and sensor nodes are responsible for detecting and collecting data from the surrounding environment. Every time the sensor node needs to transmit data, the cognitive node needs to detect the free spectrum and notify the sensor node, and then the sensor node uses the allocated spectrum to send data. Therefore, the sensor node should also have the function of dynamically changing the transmission parameters. Obviously, in this kind of network, only when the two kinds of nodes are cl...

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Abstract

The invention relates to a media access control method based on separation of cognitive and source sensing nodes in CRSNs. In the method, a cognitive function is separated from a sensor node; the sensor node does not bear a spectrum sensing function any longer and is only responsible for source sensing; the cognitive function is shifted to other special nodes in a CRSN; and the special nodes are responsible for spectrum sensing. On the one hand, the spectrum scarcity in a public frequency band working in a WSN along with rising of all kinds of emerging wireless communication technologies can be alleviated; the problems that a MAC protocol in the WSN does not consider spectrum sensing and spectrum management and the like can also be solved; on the other hand, the problem that the production cost is relatively high due to the fact that the processing complexity and the energy consumption of all the nodes by performing spectrum sensing, spectrum switching and the like are increased and each sensor node is configured with a cognitive module in the MAC protocol of the CRSN can be solved; and the problems of balancing the energy consumption of the network, prolonging the life cycle of the network, increasing the throughput capacity and the like can be well solved.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor networks, and relates to a medium access control method in CRSNs based on the separation of cognition and source perception nodes. Background technique [0002] Since the 21st century, the advancement of wireless communication technology, microchip manufacturing and other technologies has promoted the large-scale deployment, application and development of WSN. However, WSN operating in the unlicensed Industrial Scientific Medical (ISM) frequency band and other wireless communication technologies (such as Wifi, Bluetooth, Wimax, Zigbee, etc.) It affects the service quality of WSN and its continuous development. [0003] Cognitive radio (CR) can dynamically change its operating parameters, sense spectrum, determine vacant frequency bands, and use these available frequency bands opportunistically. For this reason, some researchers proposed to introduce CR technology into WSN, so that each s...

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Application Information

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IPC IPC(8): H04B17/382H04W84/18
CPCH04B17/382H04W84/18Y02D30/70
Inventor 裴二荣孙泽华
Owner CHONGQING UNIV OF POSTS & TELECOMM
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