Low power, accurate time synchronization MAC protocol for real-time wireless data acquisition

Zhang, Jie; Wu, Jie; Han, Zheng‐Fu; Liu, Liefeng; Tian, Kaiyun

doi:10.1109/rtc.2012.6418351

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…The purpose of this article is a stable securement of large available channels for the scheme of simultaneous data gathering, such as NOMA with MIMO multiplexing, 9 spread spectrum technique, 10 and PhyC-SN. 12 An effect of incrementing available channels due to controlling the interference to PS with TPC 22 is applied to the considered wireless sensor system.…”

Section: Related Workmentioning

confidence: 99%

“…There are some simultaneous access protocols such as NOMA, 9 Spread Spectrum, 10,11 and PhyC-SN. 12 Since the target of this article is how to exploit the available channels by the frequency and space reuse, the secured available channels can be used for any simultaneous access protocol.…”

Section: Ps and Ssmentioning

confidence: 99%

“…The nonorthogonal multiple access (NOMA) method, which is based on transmit power control and interference cancelation, can increase the number of simultaneous accessing terminals. 9 Spread spectrum technologies, such as frequency hopping 10 and ultra wide band, 11 enable massive numbers of sensor accesses thanks to their large spreading gains. In addition, physical wireless parameter conversion sensor network (PhyC-SN) can recognize the median and outliers of all the sensing results because they project all the sensing results onto the frequency spectrum of the carrier signal.…”

Section: Introductionmentioning

confidence: 99%

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Optimal cluster head selection and rotation of cognitive wireless sensor networks for simultaneous data gathering and long life system

Takyu

Fujii

Akimoto

et al. 2017

International Journal of Distributed Sensor Networks

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Simultaneous data gathering is an application that exploits the unique advantages of wireless sensor networks. Because many sensor nodes access a channel, co-channel interference limits the number of nodes who can access it. To suppress co-channel interference, a frequency spectrum (or channel) is required to obtain large diversity and spreading gains. Cognitive radio with transmit power control exploits available channels because, in this approach, the co-channel interference on the primary system is suppressed and spectrum sharing between the primary system and a secondary system is possible. Prolonging a node's life is also important in wireless sensor networks. However, in simultaneous data gathering, the power consumed by the relay station (cluster head) is quite high. In this article, a method for constructing a cluster head selection and rotation that is optimal for increasing the number of available channels and prolonging the life of the node is proposed. In simultaneous data gathering, the link with the minimum number of available channels is the bottleneck. Our proposed technique achieves the maximum number of available channels and extends the life of the nodes because of the cluster head rotation. In addition, the optimal number of clusters is also determined.

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