Wireless sensor networks for habitat monitoring
WSNA '02 Proceedings of the 1st ACM international workshop on Wireless sensor networks and applications
Understanding packet delivery performance in dense wireless sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
Taming the underlying challenges of reliable multihop routing in sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
An analysis of a large scale habitat monitoring application
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
Proceedings of the 3rd international conference on Embedded networked sensor systems
Proceedings of the 3rd international conference on Embedded networked sensor systems
SenSlide: a sensor network based landslide prediction system
Proceedings of the 3rd international conference on Embedded networked sensor systems
Deploying a Wireless Sensor Network on an Active Volcano
IEEE Internet Computing
Brimon: a sensor network system for railway bridge monitoring
Proceedings of the 6th international conference on Mobile systems, applications, and services
On the feasibility of the link abstraction in wireless mesh networks
IEEE/ACM Transactions on Networking (TON)
Proceedings of the 8th international conference on Mobile systems, applications, and services
Not all wireless sensor networks are created equal: A comparative study on tunnels
ACM Transactions on Sensor Networks (TOSN)
Characterization of asymmetry in low-power wireless links: an empirical study
ICDCN'11 Proceedings of the 12th international conference on Distributed computing and networking
Radio link quality estimation in wireless sensor networks: A survey
ACM Transactions on Sensor Networks (TOSN)
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In this work, we consider sensor networks used for scientific instrumentation, where we have a set of nodes collecting data and relaying the same to a central base node. From the point of view of deploying such networks,we re-look at the design choices available for the network architecture and protocol design. A design choice which has not received in-depth attention thus far is the use of external antennas for improving the communication range. We present extensive measurements to quantify the use of external antennas. We show that this is a simple yet effective mechanism, in many cases allowing the use of just a single-hop network architecture. Such an approach of course, also greatly simplifies protocol design. Related to the range studies, we also look at the time variability of RSSI and the packet error rate. We find variability at time scales as small as a single packet and also at several hours. Given this, we argue that dynamic metric based routing becomes highly questionable, and a centralized protocol design becomes a serious alternative.