Software-Defined Wireless Mesh Networking: Current Status and Challenges

Rademacher, Michael; Jonas, Karl; Siebertz, Florian; Rzyska, Adam; Schlebusch, Moritz; Kessel, Markus

doi:10.1093/comjnl/bxx066

Cited by 24 publications

(8 citation statements)

References 62 publications

(110 reference statements)

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“…According to a recent report by the International Telecommunication Union (ITU) only one out of two people on the globe and only one out of seven people in the Least Developed Countries (LDC) are using the Internet [1]. To decrease the costs of broadband connectivity and thus make the Internet more widely available, so-called "Alternative Networks" have been evaluated [2], [3]. As one of these alternatives, WiFibased Long Distance (WiLD) networks use Commercial Offthe-Shelf (COTS) high-gain directional antennas and WiFi cards to span multiple wireless links over distances up to 25 km.…”

Section: Introductionmentioning

confidence: 99%

Quantifying the spectrum occupancy in an outdoor 5 GHz WiFi network with directional antennas

Rademacher

Jonas

Kretschmer

2018

2018 IEEE Wireless Communications and Networking Conference (WCNC)

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WiFi-based Long Distance networks are seen as a promising alternative for bringing broadband connectivity to rural areas. A key factor for the profitability of these networks is using license free bands. This work quantifies the current spectrum occupancy in our testbed, which covers rural and urban areas alike. The data mining is conducted on the same WiFi card and in parallel with an operational network. The presented evaluations reveal tendencies for various aspects: occupancy compared to population density, occupancy fluctuations, (joint)vacant channels, the mean channel vacant duration, different approaches to model/forecast occupancy, and correlations among related interfaces.

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Section: Introductionmentioning

confidence: 99%

Quantifying the spectrum occupancy in an outdoor 5 GHz WiFi network with directional antennas

Rademacher

Jonas

Kretschmer

2018

2018 IEEE Wireless Communications and Networking Conference (WCNC)

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“…With SDN, changes to network separation can be configured quickly, e.g., to counter cyber attacks. Likewise, SDN can be used to enforce network compliant behavior, e.g., specified using communication rules by the operator of the communication network [ 109 , 110 ]. Dong et al [ 111 ] and White et al [ 112 ] provide more information on the opportunities and challenges of using SDN for smart grid resilience.…”

Section: Providing Cybersecurity For Interconnected Power Gridsmentioning

confidence: 99%

Cybersecurity in Power Grids: Challenges and Opportunities

Krause

Ernst

Klaer

et al. 2021

Sensors

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Increasing volatilities within power transmission and distribution force power grid operators to amplify their use of communication infrastructure to monitor and control their grid. The resulting increase in communication creates a larger attack surface for malicious actors. Indeed, cyber attacks on power grids have already succeeded in causing temporary, large-scale blackouts in the recent past. In this paper, we analyze the communication infrastructure of power grids to derive resulting fundamental challenges of power grids with respect to cybersecurity. Based on these challenges, we identify a broad set of resulting attack vectors and attack scenarios that threaten the security of power grids. To address these challenges, we propose to rely on a defense-in-depth strategy, which encompasses measures for (i) device and application security, (ii) network security, and (iii) physical security, as well as (iv) policies, procedures, and awareness. For each of these categories, we distill and discuss a comprehensive set of state-of-the art approaches, as well as identify further opportunities to strengthen cybersecurity in interconnected power grids.

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“…In the wired Internet, the reliability of the cable determines the reliability of the connection between terminals. Wired connections have a consistent cable capacity and negligible fluctuation due to several factors [19]. However, in wireless technology, the interface requires configuration and control for smooth operation of SDWMN.…”

Section: Wireless Mesh Networkmentioning

confidence: 99%

“…Hence, it is essential for SDWMN to provide access to control these parameters. As suggested by Rademacher et al [19], the capabilities for querying and modifying wireless interface parameters are classified into three requirements.…”

Section: Wireless Mesh Networkmentioning

confidence: 99%

Constructing Dynamic Ad-hoc Emergency Networks using Software-Defined Wireless Mesh Networks

Sriramulu

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Natural disasters and other emergency situations have the potential to destroy a whole network infrastructure needed for communication critical to emergency rescue, evacuation, and initial rehabilitation. Hence, the research community has begun to focus attention on rapid network reconstruction in such emergencies; however, research has tried to create or improve emergency response systems using traditional radio and satellite communications, which face high operation costs and frequent disruptions. This thesis proposes a centralized monitoring and control system to reconstruct ad-hoc networks in emergencies by using software-defined wireless mesh networks (SDWMN). The proposed framework utilizes wireless mesh networks and software-defined networking to provide real-time network monitoring services to restore Internet access in a targeted disaster zone. It dispatches mobile devices including unmanned aerial vehicles and self-driving cars to the most efficient location aggregation to recover impaired network connections by using a new GPS position finder (GPS-PF) algorithm. The algorithm is based on density-based spatial clustering that calculates the best position to deploy one of the mobile devices. The proposed system is evaluated using the common open research emulator to demonstrate its efficiency and high accessibility in emergency situations. The results obtained from the evaluation show that the performance of the emergency communication system is improved considerably with the incorporation of the framework. ACKNOWLEDGMENTS I would like to sincerely thank my advisor, Dr. Younghee Park, for giving me the opportunity to do this thesis under her guidance. I am incredibly grateful for her support, patience, and encouragement which kept me on track throughout my time as a graduate student. She helped me with organizing the thesis right from the initial draft by providing me with valuable feedback. I would also like to thank Dr. Kaikai Liu and Dr. Hyeran Jeon for serving on the defense committee. I am also thankful to Abhilash Tuse for his help in performing the experiments. Thanks are in due to my friends, especially Goutham Nekkalapu, for hearing out my problems and giving me advice. Above all, I would like to thank my parents for their enduring love and support. I dedicate this work to them. v TABLE OF CONTENTS List of Figures .

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Software-Defined Wireless Mesh Networking: Current Status and Challenges

Cited by 24 publications

References 62 publications

Quantifying the spectrum occupancy in an outdoor 5 GHz WiFi network with directional antennas

Quantifying the spectrum occupancy in an outdoor 5 GHz WiFi network with directional antennas

Cybersecurity in Power Grids: Challenges and Opportunities

Constructing Dynamic Ad-hoc Emergency Networks using Software-Defined Wireless Mesh Networks

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