Wireless Communications: Principles and Practice
Wireless Communications: Principles and Practice
Cellular Radio Performance Engineering
Cellular Radio Performance Engineering
TOSSIM: accurate and scalable simulation of entire TinyOS applications
Proceedings of the 1st international conference on Embedded networked sensor systems
Habitat monitoring with sensor networks
Communications of the ACM - Wireless sensor networks
Medium access control with coordinated adaptive sleeping for wireless sensor networks
IEEE/ACM Transactions on Networking (TON)
Routing in multi-radio, multi-hop wireless mesh networks
Proceedings of the 10th annual international conference on Mobile computing and networking
A wireless sensor network For structural monitoring
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
Reconsidering wireless systems with multiple radios
ACM SIGCOMM Computer Communication Review
CoolSpots: reducing the power consumption of wireless mobile devices with multiple radio interfaces
Proceedings of the 4th international conference on Mobile systems, applications and services
Improving wireless simulation through noise modeling
Proceedings of the 6th international conference on Information processing in sensor networks
Health monitoring of civil infrastructures using wireless sensor networks
Proceedings of the 6th international conference on Information processing in sensor networks
A low-complexity, compact antenna for mitigating frequency-selective fading
Proceedings of the 6th international conference on Information processing in sensor networks
The β-factor: measuring wireless link burstiness
Proceedings of the 6th ACM conference on Embedded network sensor systems
Exploring diversity: evaluating the cost of frequency diversity in communication and routing
Proceedings of the 6th ACM conference on Embedded network sensor systems
Poster abstract: On the spatial characteristics of the gray region for 802.15.4 radios
IPSN '09 Proceedings of the 2009 International Conference on Information Processing in Sensor Networks
Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems
Multi-radio medium access control protocol for wireless sensor networks
International Journal of Sensor Networks
Rethinking multi-channel protocols in wireless sensor networks
Proceedings of the 6th Workshop on Hot Topics in Embedded Networked Sensors
Opal: A Multiradio Platform for High Throughput Wireless Sensor Networks
IEEE Embedded Systems Letters
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Radio connectivity in wireless sensor networks is highly intermittent due to unpredictable and time-varying noise and interference patterns in the environment. Because link qualities are not predictable prior to deployment, current deterministic solutions to unreliable links, such as increasing network density or transmission power, require overprovisioning of network resources and do not always improve reliability. We propose a new dual-radio network architecture to improve communication reliability in wireless sensor networks. Specifically, we show that radio transceivers operating at well-separated frequencies and spatially separated antennas offer robust communication, high link diversity, and better interference mitigation. We derive the optimal parameters for the dual-transceiver setup from frequency and space diversity in theory. We observe that frequency diversity holds the most benefits as long as the antennas are sufficiently separated to prevent coupling. Our experiments on an indoor/outdoor testbed confirm the theoretical predictions and show that radio diversity can significantly improve end-to-end delivery rates and network stability at only a small increase in energy cost over a single radio. Simulation experiments further validate the improvements in multiple topology configurations, but also reveal that the benefits of radio diversity are coupled to the number of available routing paths to the destination.