Providing Reliable Data Services in Hybrid WSNs with Transmit-Only Nodes

Low cost and low power Wireless Sensor Networks (WSN) with transmit-only nodes are attracting more attention due to their advantages in achieving a good balance of cost, fine-grained sensing and differentiated service for data collection applications. This work addresses the reliability and performance issues of a single-hop hybrid WSN with both transmit-only nodes and standard nodes and proposes the RH-QoMoR protocol, whose robust scheme is able to provide reliable data services and the EARE (Enhanced Automatic Resource Estimation) scheme can remove time synchronization overhead and provide more resources. The analysis and extensive simulation demonstrates its capability of providing the best possible performance to the high priority nodes under harsh environment as well as minimizing the energy consumption while maintaining QoS guarantee. The protocol can also efficiently handle dynamic network changes due to the packet loss and post-deployment adjustment.