Scheduling Algorithms for Multiprogramming in a Hard-Real-Time Environment
Journal of the ACM (JACM)
Topology management for sensor networks: exploiting latency and density
Proceedings of the 3rd ACM international symposium on Mobile ad hoc networking & computing
Understanding packet delivery performance in dense wireless sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
Timing-sync protocol for sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
An adaptive energy-efficient MAC protocol for wireless sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
Energy-efficient collision-free medium access control for wireless sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
ALOHA packet system with and without slots and capture
ACM SIGCOMM Computer Communication Review
The flooding time synchronization protocol
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
Versatile low power media access for wireless sensor networks
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
Fine-grained network time synchronization using reference broadcasts
OSDI '02 Proceedings of the 5th symposium on Operating systems design and implementationCopyright restrictions prevent ACM from being able to make the PDFs for this conference available for downloading
Nano-RK: An Energy-Aware Resource-Centric RTOS for Sensor Networks
RTSS '05 Proceedings of the 26th IEEE International Real-Time Systems Symposium
WiseMAC: an ultra low power MAC protocol for the downlink of infrastructure wireless sensor networks
ISCC '04 Proceedings of the Ninth International Symposium on Computers and Communications 2004 Volume 2 (ISCC"04) - Volume 02
IEEE Journal on Selected Areas in Communications
Distributed Latency-Energy Minimization and interference avoidance in TDMA Wireless Sensor Networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
2C-WSN: a configuration protocol based on TDMA communications over WSN
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
A fast network configuration algorithm for TDMA wireless sensor networks
EURASIP Journal on Wireless Communications and Networking - Special issue on design, implementation, and evaluation of wireless sensor network systems
Low-overhead dynamic multi-channel MAC for wireless sensor networks
EWSN'10 Proceedings of the 7th European conference on Wireless Sensor Networks
Application-level operations latency control in networked WSAN
ADHOC-NOW'12 Proceedings of the 11th international conference on Ad-hoc, Mobile, and Wireless Networks
Robust architectures for embedded wireless network control and actuation
ACM Transactions on Embedded Computing Systems (TECS)
Configuration and operation of networked control systems over heterogeneous WSANs
ACM Transactions on Embedded Computing Systems (TECS) - Special Section on ESTIMedia'10
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For real-time wireless communication in industrial control, surveillance and inventory tracking, we propose RT-Link, a time-synchronized link protocol. RT-Link provides predictable lifetime for battery-operated embedded nodes, bounded end-to-end delay across multiple hops, and collision-free operation. We investigate the use of hardware-based time-synchronization for infrastructure nodes by using an AM carrier-current radio for indoors and atomic clock receivers for outdoors. Mobile nodes are synchronized via in-band software synchronization within the same framework. Through the design and deployment of RT-Link, we identify three key observations: (a) Hardware-based global time-synchronization is a robust and scalable option to in-band software-based techniques. (b) Achieving global time-synchronization is both economical and convenient for indoor and outdoor deployments. (c) RT-Link achieves a practical lifetime of over 2 years. By analysis and simulation, we show that RT-Link outperforms energy-efficient low-power-listen CSMA protocols in terms of node lifetime and end-to-end latency. The protocol supports flexible services such as on-demand end-to-end rate control and logical topology control. We implemented RT-Link on the CMU FireFly sensor platform as a link layer running on the Nano-RK real-time sensor OS. We also discuss deployment experiences using RT-Link in a coal mine safety application.