A hybrid method for the QoS analysis and parameter optimization in time-critical random access wireless sensor networks

Abstract

Evolution in electronics has led to the development of complex applications in wireless sensor networks (WSNs), where efficient and swift event reporting is needed. In time-critical applications, achieving an adequate report latency is particularly relevant as it allows a proper reaction from the network to the occurring phenomena. It is evident that mean report latency is insufficient as a QoS indicator for time-critical applications. Instead, high percentiles or the whole distribution are much better suited. In certain applications such as target tracking and positioning, the transmission of a certain number of event packets is required to accurately characterize the occurring phenomena. Building on this, we present a hybrid method for obtaining the probability distribution of report latency in random access (RA) WSN protocols. In this method, the distribution of the number of detecting nodes is obtained by simulation, which then allows us to obtain the desired QoS parameters analytically. In this study, we use our method to obtain and optimize the event report latency and energy consumption in RA WSNs. Results show that modifying the transmission parameters during backoff increases the robustness of RA event reporting and also enhances the performance of the WSN in environments where multiple types of events can be detected.

Development of Wireless Sensor Network for Environment Monitoring and Its Implementation Using SSAIL Technology

“…For the energy-harvesting technique [ 4 ], research challenges on topologies and the energy management system [ 6 , 13 ], and the proposed system optimization, would increase the system reliability and scalability. Our discussion stresses the classification of coverage [ 5 , 6 , 7 , 8 ], practical challenges in the deployment of WSNs [ 8 , 9 , 10 ], QoS support [ 15 , 16 , 17 ], sensing models, and research issues in WSNs [ 11 , 12 ].…”

“…A hybrid method for obtaining the probability distribution of report latency in random access (RA) WSN protocols [ 17 ] is studied and it is beneficial for assessing the QoS of WSNs in time-critical applications. In this manner, event reporting is time-constrained and fault-sensitive.…”

On reliable and energy efficient massive wireless communications: the road to 5G

“…Please observe that (5.25) and (5.26) are different to the equations presented in our previous work [62]. The reason for this is that the formulas presented in this chapter are much more computationally efficient than those used in prior work.…”

“…The main contributions of this chapter were published in [62], while a preliminary version was published in [63].…”

“…That is, the network is capable of providing a near-optimal performance even when the selection of parameters is far from optimal. As a summary, the main contributions and scientific publications derived from this thesis with respect to WSNs include the formulation of the hybrid model, the proposal of a RA protocol for event reporting in critical-time applications that incorporates the approaches described above, and the performance evaluation and parameter optimization of this protocol [62,63].…”