Elements of information theory
Elements of information theory
Switched Parasitic Antennas for Cellular Communications
Switched Parasitic Antennas for Cellular Communications
Telos: enabling ultra-low power wireless research
IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks
MobiSteer: using steerable beam directional antenna for vehicular network access
Proceedings of the 5th international conference on Mobile systems, applications and services
The β-factor: measuring wireless link burstiness
Proceedings of the 6th ACM conference on Embedded network sensor systems
Not all wireless sensor networks are created equal: A comparative study on tunnels
ACM Transactions on Sensor Networks (TOSN)
SAMAC: A Cross-Layer Communication Protocol for Sensor Networks with Sectored Antennas
IEEE Transactions on Mobile Computing
Motes in the jungle: lessons learned froma short-term WSN deployment in the ecuador cloud forest
REALWSN'10 Proceedings of the 4th international conference on Real-world wireless sensor networks
REALWSN'10 Proceedings of the 4th international conference on Real-world wireless sensor networks
Industry: beyond interoperability: pushing the performance of sensor network IP stacks
Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems
Quantifying the channel quality for interference-aware wireless sensor networks
ACM SIGBED Review - Special Issue on the 10th International Workshop on Real-time Networks (RTN 2011)
EM-MAC: a dynamic multichannel energy-efficient MAC protocol for wireless sensor networks
MobiHoc '11 Proceedings of the Twelfth ACM International Symposium on Mobile Ad Hoc Networking and Computing
Low-overhead dynamic multi-channel MAC for wireless sensor networks
EWSN'10 Proceedings of the 7th European conference on Wireless Sensor Networks
Multi-channel two-way time of flight sensor network ranging
EWSN'12 Proceedings of the 9th European conference on Wireless Sensor Networks
High Resolution 3-D Angle of Arrival Determination for Indoor UWB Multipath Propagation
IEEE Transactions on Wireless Communications
Radio link quality estimation in wireless sensor networks: A survey
ACM Transactions on Sensor Networks (TOSN)
Ad hoc networking with directional antennas: a complete system solution
IEEE Journal on Selected Areas in Communications
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By radiating the power in the direction of choice, electronically-switched directional (ESD) antennas can reduce network contention and avoid packet loss. There exists some ESD antennas for wireless sensor networks, but so far researchers have mainly evaluated their directionality. There are no studies regarding the link dynamics of ESD antennas, in particular not for indoor deployments and other scenarios where nodes are not necessarily in line of sight. Our long-term experiments confirm that previous findings that have demonstrated the dependence of angle-of-arrival on channel frequency also hold for directional transmissions with ESD antennas. This is important for the design of protocols for wireless sensor networks with ESD antennas: the best antenna direction, i.e., the direction that leads to the highest packet reception rate and signal strength at the receiver, is not stable but varies over time and with the selected IEEE 802.15.4 channel. As this requires protocols to incorporate some form of adaptation, we present an intentionally simple and yet efficient mechanism for selecting the best antenna direction at run-time with an energy overhead below 2 standard omni-directional transmissions.