Media access control method for cognitive sensor network based on lead sensing

A medium access control, sensor network technology, applied in transmission monitoring, transmission system, power management and other directions, can solve the problems of resource waste, high computational overhead, control channel saturation, etc., to achieve the effect of low-power operation

Inactive Publication Date: 2017-05-03
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Aiming at the problems of control channel saturation, resource waste and high computational overhead in the opportunistic spectrum access method adopted by traditional cognitive sensor networks, the present invention proposes a medium access control method for cognitive sensor networks based on preamble interception. Realize low-overhead and highly reliable access to licensed frequency bands for cognitive sensor networks

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  • Media access control method for cognitive sensor network based on lead sensing
  • Media access control method for cognitive sensor network based on lead sensing
  • Media access control method for cognitive sensor network based on lead sensing

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] The present invention proposes an adaptive medium access control method for cognitive sensor networks, the main idea of ​​which is through CS-TX queue detection, spectrum sensing, carrier monitoring, sending preamble, data transmission, parameter adjustment and sleep and The process of preamble listening, receiving data and sleeping of CX-RX realizes adaptive medium access control of cognitive sensor network. While ensuring the reliable access of the cognitive sensor network to the licensed frequency band, parameters such as spectrum sensing and duty cycle can be adaptively adjusted to reduce the energy consumption of the system.

[0031] The invention is applicable to the cognitive sensor network adopting the opportunistic spectrum access mode. Suppose there are M pairs of CSs in the cognitive sensor network. Each CS is equipped with...

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Abstract

The invention relates to a wireless sensor network technology, and specifically relates to an adaptive media access control method for a cognitive sensor network based on lead sensing. The method supports a sleep-wake up mechanism of cognitive sensors, and effectively solves a problem of idle sensing of the cognitive sensors and a problem of collision among the cognitive sensors by adopting a technology of combining lead sensing and carrier sensing. In addition, an adaptive sensing and duty ratio adjustment strategy is provided, and low-power-consumption running of the cognitive sensor network is realized under the premise of ensuring sufficient protection for a primary user. According to the invention, a lead sensing based adaptive media access control mechanism is defined, so that low-overhead reliable access of the cognitive sensor network for authorized frequency band can be realized without the need of a common control channel.

Description

technical field [0001] The invention relates to wireless sensor network technology, in particular to a medium access control method for a cognitive sensor network based on preamble interception. Background technique [0002] Most of the devices in wireless sensor networks work in the license-free ISM frequency band. In addition to wireless sensor networks, wireless devices working in the ISM frequency band also include microwave ovens, radio frequency identification RFID, cordless phones, and Bluetooth. The open and shared nature of the wireless channel makes the above wireless devices interfere with each other with the wireless sensor network, resulting in a significant drop in the transmission reliability of the wireless sensor network, which brings challenges to the reliable transmission of the wireless sensor network. Cognitive sensor networks integrate the concept of cognitive radio into the design of wireless sensor networks. While realizing dynamic access to licensed...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/02H04W74/08H04W76/06H04B17/00
CPCH04W52/0293H04W74/0816H04W76/38Y02D30/70
Inventor 郑萌许驰张晓玲梁炜于海斌
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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