Date Added: Dec 2011
Wireless Sensor Networks (WSNs) have wide variety of applications and provide limitless future potentials. Nodes in WSNs are prone to be failure due to energy depletion, hardware failure, communication link errors, malicious attack, and so on. Therefore, fault tolerance is one of the critical issues in WSNs. Directed diffusion is a classic data-centric routing protocol in Wireless Sensor Networks (WSNs). However, the communication cost and energy balance over the whole WSNs have not been paid enough attention. Hybrid PUSH-PULL data Diffusion (LOHD) is a data dissemination algorithm for data-centric sensor networks. LOHD works well in a wide range of networks and source/sink settings.