Towards the Implementation of Reliable Data Transmission for 802.15.4-Based Wireless Sensor Networks

Reliable data transmission in a wireless sensor network is one of the most significant factors in order to guarantee dependable and efficient sensor data delivery. As sensor network applications diversify and increase, the transmission reliability of sensor data is of uppermost importance. In this paper, we propose a hybrid hop-by-hop reliable approach based on IEEE 802.15.4, which has adaptive link control and enhanced hop-by-hop reliability. The adaptive link control scheme considers the packet's application type and the destination's link status. The proposed hybrid hop-by-hop approach selects an optimized MAC transmission state of related parameters, followed by an additional operation of finding alternative paths for a reliable transmission. In addition, a nodal caching and one hop acknowledgement schemes are used for enhancing hop-by-hop reliability further. We evaluated the proposed approach using NS-2 and C code simulation. Compared with the IEEE 802.15.4 MAC scheme, the simulation results show that the proposed approach is much more robust and reliable in the large number of hops and highly error-prone situation. Finally, we showed our own sensor H/W platform and analysis tool.

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