Abstract

The opportunistic cooperative platform and adaptive cooperative control scheme were proposed based on the redundancy degree and priority of cooperative data packet, as well as selective characteristics of time domain and frequency domain. First, opportunistic cooperative platform was defined according to the cooperative data stream scale, mapping algorithm, and priority and redundancy of cooperative data packets. Second, under the single or multiple relay network environment and mobility of sensors, the selective characteristics of time and frequency domain were studied. The active domain and negative domain were proposed for adjusting and improving the opportunistic cooperative platform. Third, the opportunistic cooperative control mechanism based on selectivity of time domain and frequency domain (OCC-TFD) was proposed for improving the performance of wireless sensor networks. Finally, the mathematical results demonstrated that the proposed platform and scheme can provide reliable, robust, and efficient data communication services of wireless sensor networks.

Highlights

  • The opportunistic network is composed of the nodes with self-organized data transmission without maintaining the transmission path between the sender and destination nodes, which give full consideration to the dynamic characteristics [1] of the network topology

  • 5 Performance evaluation and results the proposed opportunity cooperative platform and control mechanism based on selectivity of time domain and frequency domain (OCC-TFD), opportunity cooperative control mechanism based on selectivity of time domain (OCC-TD), opportunity cooperative control mechanism based on selectivity of frequency domain (OCC-FD), and cooperative control scheme based on the optimal power allocation and signal to noise (CC-OPAS) for wireless sensor networks are simulated, analyzed, and evaluated with two group experiments, which include the following metrics: signal, packet error rate, average delivery delay, throughput, and energy efficiency

  • We found that the above schemes could decrease the delay with increasing the signal-tonoise ratio (SNR)

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Summary

Introduction

The opportunistic network is composed of the nodes with self-organized data transmission without maintaining the transmission path between the sender and destination nodes, which give full consideration to the dynamic characteristics [1] of the network topology. The previous static opportunistic network algorithm [6], data stream computing method, and fixed. On the one hand, based on the independent and nonidentically distributed Nakagami-m fading channels, Yuan et al [7] researched the dual-hop wireless cooperative network with opportunistic amplify-and-forward relaying algorithm. Shi et al [8] proposed the multi-user cooperative communication protocol for selecting the relay node and improving the system throughput, based on the opportunistic communication and network coding. The low overhead multi-relay selection protocol was proposed to support multi-stream cooperative communications in [10]. Wu et al [12] proposed the use of smartphones to collect data from sensor nodes opportunistically, by accessing data from a wireless sensor network and over the generation of data through participatory sensing.

Opportunity cooperation platform
LX ð4Þ
Conclusions

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