Timing-sync protocol for sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
Time synchronization in wireless sensor networks
Time synchronization in wireless sensor networks
Link-level measurements from an 802.11b mesh network
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The flooding time synchronization protocol
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
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A general model of wireless interference
Proceedings of the 13th annual ACM international conference on Mobile computing and networking
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Proceedings of the 13th annual ACM international conference on Mobile computing and networking
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SWARM: the power of structure in community wireless mesh networks
Proceedings of the 5th international conference on Emerging networking experiments and technologies
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
XPRESS: a cross-layer backpressure architecture for wireless multi-hop networks
MobiCom '11 Proceedings of the 17th annual international conference on Mobile computing and networking
SWARM: the power of structure in community wireless mesh networks
IEEE/ACM Transactions on Networking (TON)
PIP: A multichannel, TDMA-based MAC for efficient and scalable bulk transfer in sensor networks
ACM Transactions on Sensor Networks (TOSN)
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Proceedings of the ninth ACM international workshop on Vehicular inter-networking, systems, and applications
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Proceedings of the 19th annual international conference on Mobile computing & networking
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WiFlex'13 Proceedings of the First international conference on Wireless Access Flexibility
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We present the design, implementation, and evaluation of a Time Division Multiplex (TDM) MAC protocol for multi-hop wireless mesh networks using a programmable wireless platform. Extensive research has been devoted to optimal scheduling algorithms for multi-hop wireless networks assuming a perfect TDM MAC protocol. However, the problem of designing and implementing such a protocol has not received due attention. We introduce a design framework that addresses the three main challenges that comprise this problem: (i) How to calibrate and optimize the TDM MAC protocol parameters given a wireless platform, (ii) how to achieve network-wide synchronization with high accuracy, minimal overhead, and most importantly, bounded delay, and (iii) how to integrate the synchronization algorithm with the TDM MAC protocol state machine using minimal hardware resources. We apply our design framework to our platform and evaluate the resulting TDM MAC protocol through controlled experiments in a wireless mesh testbed. The results demonstrate the protocol's ability to provide fairness and graceful performance degradation under packet losses and multi-hop traffic patterns that arise in mesh network deployments.