Self-stabilizing systems in spite of distributed control
Communications of the ACM
Performance of multihop wireless networks: shortest path is not enough
ACM SIGCOMM Computer Communication Review
Worldsens: development and prototyping tools for application specific wireless sensors networks
Proceedings of the 6th international conference on Information processing in sensor networks
Topology Formation in IEEE 802.15.4: Cluster-Tree Characterization
PERCOM '08 Proceedings of the 2008 Sixth Annual IEEE International Conference on Pervasive Computing and Communications
Proceedings of the 11th international symposium on Modeling, analysis and simulation of wireless and mobile systems
A Turnover based Adaptive HELLO Protocol for Mobile Ad Hoc and Sensor Networks
MASCOTS '07 Proceedings of the 2007 15th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems
DRAND: Distributed Randomized TDMA Scheduling for Wireless Ad Hoc Networks
IEEE Transactions on Mobile Computing
The MAC unreliability problem in IEEE 802.15.4 wireless sensor networks
Proceedings of the 12th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
Computer Networks: The International Journal of Computer and Telecommunications Networking
Opportunity-Based Topology Control in Wireless Sensor Networks
IEEE Transactions on Parallel and Distributed Systems
A new association scheme of IEEE 802.15.4 for real-time applications
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Secure Data Collection in Wireless Sensor Networks Using Randomized Dispersive Routes
IEEE Transactions on Mobile Computing
SENSORCOMM '10 Proceedings of the 2010 Fourth International Conference on Sensor Technologies and Applications
Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems
Smart home energy management system using IEEE 802.15.4 and zigbee
IEEE Transactions on Consumer Electronics
TBoPS: A Tree Based Distributed Beacon Only Period Scheduling Mechanism for IEEE 802.15.4
DCOSS '12 Proceedings of the 2012 IEEE 8th International Conference on Distributed Computing in Sensor Systems
Optimized Asynchronous Multichannel Discovery of IEEE 802.15.4-Based Wireless Personal Area Networks
IEEE Transactions on Mobile Computing
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IEEE 802.15.4-2006 represents a widely used standard for multihop wireless sensor networks. However, the standard exploits a tree structure in the MAC layer, which may lead to network partitions even after a single link or node failure, i.e. the well known single point of failure problem. Besides, the single path approach avoids the routing protocol to select by itself a next hop based on its own criteria. Moreover, transmissions must be appropriately scheduled in the IEEE 802.15.4 cluster-tree to avoid collisions. In this paper, we propose to modify the cluster-tree structure into a Cluster-Directed Acyclic Graph (DAG) to improve the robustness and the topology redundancy at the MAC layer. We also present a simple greedy scheduling algorithm integrated with the IEEE 802.15.4 MAC mechanisms. Simulations show that the proposed mechanisms optimize the MAC layer for multihop topologies. In particular, the routing protocol (e.g. RPL) is able to exploit efficiently the cluster-DAG and to reduce the number of packet losses and the end-to-end delay. Last but not least, the cluster-DAG structure leads globally to energy savings by reducing the number of transmissions at the MAC layer.