Abstract
A Wireless Sensor Network is the collection of large number of sensor nodes, which are technically or economically feasible and measure the ambient condition in the environment surrounding them. The difference between usual wireless networks and WSNs is that sensors are sensitive to energy consumption. Most of the attention is given to routing protocols, for energy awareness, since they might differ depending on the application and network architecture. Routing techniques for WSN are classified into three categories based on network structure: Flat, hierarchical and location-based routing. Furthermore, these protocols can be classified into multipath based, query based, negotiation-based, QoS-based, and coherent–based, depending on the protocol operation. In this paper the survey of routing techniques in WSNs is shown. It is also outlined the design challenges and performance metrics for routing protocols in WSNs. Finally We also highlight the advantages and performance issues of different routing techniques by it’s comparative analysis. Future-directions for routing in sensor network is also described.
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