Design Considerations for Intermittently Connected Energy Harvesting Wireless Sensor Networks

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Rajib, M. M. I. (2018). Design Considerations for Intermittently Connected Energy Harvesting Wireless Sensor Networks. Unc Charlotte Electronic Theses And Dissertations.
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Abstract

Wireless sensor networks can potentially achieve perpetual maintenance-free operation by harnessing ambient energy from the environment. However, most environmental energy sources, such as vibrations, heat, radio frequency (RF) are usually inadequate and sporadic in nature. Therefore, sensor nodes that rely solely on such environmental resources, suffer from frequent and random energy outages. This energy outage leads to intermittent connectivity and induces a large delay in multi-hop transmission paradigms. The objective of this research is to minimize the end-to-end latency due to this intermittent connectivity. In order to address this problem, several approaches are explored. First, cooperative relaying is investigated as a potential mechanism for reducing the transmission delay. The latency associated with cooperative relaying over unicast routes is analyzed and a novel scheme is proposed to improve the performance of cooperative relaying in a more practical multi-hop setting. Next, a predictive retransmission strategy is developed to find the best retransmission intervals that maximize the success probability associated with each transmission. This strategy is then adapted to two different asynchronous routing protocols: cooperative relaying over unicast routes and opportunistic routing. Finally, the delay characteristics of RF energy harvesting sensor networks is explored and analytical models are formulated to reduce delay by efficiently distributing packet forwarding load between the transmitter and receiver nodes. Performance evaluations from the theoretical models and simulations show that the proposed methods can significantly improve the delay performance in comparison to existing solutions.

Details
Author

Rajib, Md Majharul Islam

Title

Design Considerations for Intermittently Connected Energy Harvesting Wireless Sensor Networks

Physical Description

1 online resource (103 pages) : PDF

Date

2018

Degree Granting Institution

University of North Carolina at Charlotte

Abstract

Wireless sensor networks can potentially achieve perpetual maintenance-free operation by harnessing ambient energy from the environment. However, most environmental energy sources, such as vibrations, heat, radio frequency (RF) are usually inadequate and sporadic in nature. Therefore, sensor nodes that rely solely on such environmental resources, suffer from frequent and random energy outages. This energy outage leads to intermittent connectivity and induces a large delay in multi-hop transmission paradigms. The objective of this research is to minimize the end-to-end latency due to this intermittent connectivity. In order to address this problem, several approaches are explored. First, cooperative relaying is investigated as a potential mechanism for reducing the transmission delay. The latency associated with cooperative relaying over unicast routes is analyzed and a novel scheme is proposed to improve the performance of cooperative relaying in a more practical multi-hop setting. Next, a predictive retransmission strategy is developed to find the best retransmission intervals that maximize the success probability associated with each transmission. This strategy is then adapted to two different asynchronous routing protocols: cooperative relaying over unicast routes and opportunistic routing. Finally, the delay characteristics of RF energy harvesting sensor networks is explored and analytical models are formulated to reduce delay by efficiently distributing packet forwarding load between the transmitter and receiver nodes. Performance evaluations from the theoretical models and simulations show that the proposed methods can significantly improve the delay performance in comparison to existing solutions.

Genre

doctoral dissertations

Subjects--Topics

Electrical engineering

Degree

Ph.D.

Keywords

Cooperative Relaying
Intermittent Connectivity
Mac Protocols
Opportunistic Routing
RF Energy Harvesting
Wireless Sensor Networks

Subject Area

Electrical Engineering

Advisor(s)

Nasipuri, Asis

Committee Members

Xie, Jiang
Wang, Yu
Pulugurtha, Srinivas

Degree Note

Thesis (Ph.D.)--University of North Carolina at Charlotte, 2018.

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Rights Holder Information

Copyright is held by the author unless otherwise indicated.

Identifier

Rajib_uncc_0694D_11688

Permalink

http://hdl.handle.net/20.500.13093/etd:1217