Wireless sensor networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Simultaneous optimization for concave costs: single sink aggregation or single source buy-at-bulk
SODA '03 Proceedings of the fourteenth annual ACM-SIAM symposium on Discrete algorithms
Impact of Network Density on Data Aggregation in Wireless Sensor Networks
ICDCS '02 Proceedings of the 22 nd International Conference on Distributed Computing Systems (ICDCS'02)
The impact of spatial correlation on routing with compression in wireless sensor networks
Proceedings of the 3rd international symposium on Information processing in sensor networks
Spatio-temporal correlation: theory and applications for wireless sensor networks
Computer Networks: The International Journal of Computer and Telecommunications Networking - Special issue: In memroy of Olga Casals
Reliable bursty convergecast in wireless sensor networks
Proceedings of the 6th ACM international symposium on Mobile ad hoc networking and computing
IEEE Transactions on Computers
Detection Performance and Energy Efficiency of Sequential Detection in a Sensor Network
HICSS '06 Proceedings of the 39th Annual Hawaii International Conference on System Sciences - Volume 09
Energy-driven detection scheme with guaranteed accuracy
Proceedings of the 5th international conference on Information processing in sensor networks
Routing Correlated Data with Fusion Cost in Wireless Sensor Networks
IEEE Transactions on Mobile Computing
Scalable data aggregation for dynamic events in sensor networks
Proceedings of the 4th international conference on Embedded networked sensor systems
An application-specific protocol architecture for wireless microsensor networks
IEEE Transactions on Wireless Communications
DCTC: dynamic convoy tree-based collaboration for target tracking in sensor networks
IEEE Transactions on Wireless Communications
Information-directed routing in ad hoc sensor networks
IEEE Journal on Selected Areas in Communications
Energy efficiency of dense wireless sensor networks: to cooperate or not to cooperate
IEEE Journal on Selected Areas in Communications
Information quality-aware tracking in uncertain sensor network
International Journal of Sensor Networks
| Hi-index | 0.00 |
Upon the occurrence of a phenomenon of interest in a wireless sensor network, multiple sensors may be activated, leading to data implosion and redundancy. Data aggregation and/or fusion techniques exploit spatio-temporal correlation among sensory data to reduce traffic load and mitigate congestion. However, this is often at the expense of loss in Information Quality (IQ) of data that is collected at the fusion center. In this work, we address the problem of finding the leastcost routing tree that satisfies a given IQ constraint. We note that the optimal least-cost routing solution is a variation of the classical NP-hard Steiner tree problem in graphs, which incurs high overheads as it requires knowledge of the entire network topology and individual IQ contributions of each activated sensor node. We tackle these issues by proposing: (i) a topology-aware histogram-based aggregation structure that encapsulates the cost of including the IQ contribution of each activated node in a compact and efficient way; and (ii) a greedy heuristic to approximate and prune a least-cost aggregation routing path. We show that the performance of our IQ-aware routing protocol is: (i) bounded by a distance-based aggregation tree that collects data from all the activated nodes; and (ii) comparable to another IQ-aware routing protocol that uses an exhaustive brute-force search to approximate and prune the least-cost aggregation tree.