Trust-Based Hierarchical Routing Protocol for Wireless Sensor Networks

Network Lifetime is an important issue in Wireless Sensor Networks. It depends on many factors like the amount of data to be communicated, number of nodes in the network and initial energy of the sensor nodes. This paper proposes a novel routing protocol by name Trust-Based Hierarchical Routing (TBHR) protocol for multi-hop hierarchical wireless sensor network. The proposed protocol is based on trust evaluated for every sensor node in the network. Trust of a sensor node comprises of components derived from communication and social networks. Trust of a sensor node depends on the residual energy of the node and the number of transactions it has with its neighbors and its cluster head. The proposed protocol has two fold benefits. First it allows more number of nodes in the network to participate in transmission to balance energy in the nodes and thus improves the network lifetime. Second it ensures better packet delivery ratio though the number of untrustworthy nodes increases in the network. The data packet is flooded in the network by the source node when the number of trustable nodes in the network falls below 35 % of total nodes in the network. Flooding achieves optimum packet delivery ratio in the network. The same facts are verified by simulation results by analyzing the factors sensor node trust, network lifetime and delivery factor

Similar Concepts, Distinct Solutions, Common Problems: Learning from PLM and BIM Deployment

Part 1: BIM Operations, Maintenance and RenovationInternational audienceThis paper describes the similarities and differences between Product Lifecycle Management and Building Information Modelling concepts, focusing on integration issues relative to their methods, information systems, effects and criticisms. In this literature based discussion, the authors show that the two concepts share fundamental similarities but are distinct in their scope and level of integration as well as maturity of process and workflow management. The paper highlights several common problems and aims to provide guidance for deployment initiatives

Erratum to ‘Efficacy and correlative analyses of avelumab plus axitinib versus sunitinib in sarcomatoid renal cell carcinoma: post hoc analysis of a randomized clinical trial’

International audienceNo abstract availabl