Abstract
Instrumented is defined as a key characteristic in the upcoming smart cites, which demands a higher Wireless Sensor Networks (WSNs) performance. Tree-based Hierarchical Routing (THR) is a routing protocol for WSNs static scenarios. THR hierarchically maps WSN area into a routing tree. However, fixed topology and hierarchical architecture leads to unbalanced energy overhead distribution and inflexible routes selection. To uniformly distribute routing energy overhead, reduce routing hops and extend network life cycle, we designed an enhanced THR routing protocol based on additional connections such as Neighbors, Brothers and Nephews. Based on these connections, three actions were introduced which are Shortcut, Overhead Balancing and Adoption. A simulation for different network loads on OMNet++4.1 is issued, and realized this THR routing in Chipcon SmartRF04?EB embedded boards based on Zigbee in a point-to-point topology. According to the simulation results and experiment data, this proposal obviously improved the latency performance, reduced energy overhead and extended the network’s life cycle.
Highlights
Wireless Sensor Networks (WSNs) is composed by lots of sensor nodes deployed for monitored area in a self-organized multi-hop manner
In previous work [2], we proposed an enhanced Ad-hoc On-demand Distance Vector (AODV) routing protocol, selecting route based on the residual energy and link capacity, which improves the performance in network life cycle and average packet delay
Tree-based Hierarchical Routing (THR) is a suitable routing strategy for stationary wireless sensor network (S-WSNs). Aim of this enhanced THR routing protocol we proposed is to decrease the latency for data collection and to extend network life time promotes application of S-WSNs in industry environments
Summary
Wireless Sensor Networks (WSNs) is composed by lots of sensor nodes deployed for monitored area in a self-organized multi-hop manner. Different from AODV, routing information is kept by parent-child relationship in Tree-based Hierarchical Routing (THR) protocol, better suited for static scenarios As it doesn’t need to perform route discovery process, its latency performance improves a lot. To provide a more flexible routing technology for static wireless sensor applications, we developed an enhanced THR routing protocol to fulfill functions of providing choice priority, indicating shortest path and resetting topology with minimum costs. To realize these functions, Neighbor, Nephew and Brother Connections were introduced, and address assignment method is realized to create initial topology tree. Ren et al 210 lized THR protocol on OMNet++4.1 network simulator and tested one source-sink point to point connection on two Chipcon SmartRF®04EB embedded boards
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