IEEE Transactions on Mobile Computing
Alternating opportunistic large arrays in broadcasting for network lifetime extension
IEEE Transactions on Wireless Communications
Wireless physical-layer security: the case of colluding eavesdroppers
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 4
Information quality aware routing in event-driven sensor networks
INFOCOM'10 Proceedings of the 29th conference on Information communications
Testing selective transmission with low power listening
REALWSN'10 Proceedings of the 4th international conference on Real-world wireless sensor networks
Reliable and energy efficient cooperative detection in wireless sensor networks
Computer Communications
Randomized information dissemination in dynamic environments
IEEE/ACM Transactions on Networking (TON)
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Decentralized detection in a network of wireless sensor nodes involves the fusion of information about a phenomenon of interest (PoI) from geographically dispersed nodes. In this paper, we investigate the problem of binary decentralized detection in a dense and randomly deployed wireless sensor network (WSN), whereby the communication channels between the nodes and the fusion center are bandwidth-constrained. We consider a scenario in which sensor observations, conditioned on the alternate hypothesis, are independent but not identically distributed across the sensor nodes. We compare two different fusion architectures, namely, the parallel fusion architecture (PFA) and the cooperative fusion architecture (CFA), for such bandwidth-constrained WSNs, where each sensor node is restricted to send a I-bit information to the fusion center. For each architecture, we derive expression for the probability of decision error at the fusion center. We propose a consensus flooding protocol for CFA and analyze its average energy consumption. We analyze the effects of PoI intensity, realistic link models, consensus flooding protocol, and network connectivity on the system reliability and average energy consumption for both fusion architectures. We demonstrate that a trade-off exists among spatial diversity gain, average energy consumption, delivery ratio of the consensus flooding protocol, network connectivity, node density, and Poll intensity in CFA. We then provide insight into the design of cooperative WSNs