The wireless synchronization problem
Proceedings of the 28th ACM symposium on Principles of distributed computing
Distributed contention resolution in wireless networks
DISC'10 Proceedings of the 24th international conference on Distributed computing
Scheduling multicast transmissions under SINR constraints
ALGOSENSORS'10 Proceedings of the 6th international conference on Algorithms for sensor systems, wireless adhoc networks, and autonomous mobile entities
Radiation Awareness in Three-Dimensional Wireless Sensor Networks
DCOSS '12 Proceedings of the 2012 IEEE 8th International Conference on Distributed Computing in Sensor Systems
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This research further investigates the recently introduced (in [4]) paradigm of radiation awareness in ambient environments with abundant heterogeneous wireless networking from a distributed computing perspective. We call radiation at a point of a wireless network the total amount of electromagnetic quantity the point is exposed to; our definition incorporates the effect of topology as well as the time domain and environment aspects. Even if the impact of radiation to human health remains largely unexplored and controversial, we believe it is worth trying to understand and control, in a way that does not decrease much the quality of service offered to users of the wireless network. In particular, we here focus on the fundamental problem of efficient data propagation in wireless sensor networks, trying to keep latency low while maintaining at low levels the radiation cumulated by wireless transmissions. We first propose greedy and oblivious routing heuristics that are radiation aware. We then combine them with temporal back-off schemes that use local properties of the network (e.g. number of neighbours, distance from sink) in order to "spread" radiation in a spatio-temporal way. Our proposed radiation aware routing heuristics succeed to keep radiation levels low, while not increasing latency.