Abstract
With the rapid development in mobile Wireless Sensor Networks (WSNs), it has become very essential to focus on the efficiency in performance of small sensing nodes operating in WSNs. While designing a routing protocol for mobile sensor nodes, the quality parameters like end-to-end delays and routing overhead are always considered. Moreover, the nodes in wirelessly connected mobile networks consume considerable power on routing more than other functionalities. Any modification in a standard routing protocol can also affect routing overhead, end-to-end delays, and energy consumption of nodes. In this paper a new hybrid routing protocol, named as State-Aware Link Maintenance Approach (SALMA), is introduced which is based on Dynamic Source Routing (DSR) and Optimized Link State Routing (OLSR) protocols. The work also focuses on the activeness of nodes in the network operations and defines three states of nodes, that is, white, gray, and black. The work concludes that the proposed protocol gives improvements in some quality of service metrics like lower delay than DSR, lower routing overhead than OLSR, and lesser energy consumption by the network nodes.
Highlights
Wireless Sensor Networks (WSNs) are being deployed for various purposes in a wide range of critical applications such as environmental monitoring, health-care, and military applications
When sensor nodes in a WSN are not mobile it is better to have proactive routing protocols like Optimized Link State Routing (OLSR) and Destination-Sequenced Distance-Vector (DSDV)
The normalized end-to-end delays with various pause times is examined and it is found that State-Aware Link Maintenance Approach (SALMA) has less average delay times when compared to the pure proactive and reactive protocols, that is, Dynamic Source Routing (DSR) and OLSR
Summary
Wireless Sensor Networks (WSNs) are being deployed for various purposes in a wide range of critical applications such as environmental monitoring, health-care, and military applications. Comparing with the proactive routing protocols nodes use very less bandwidth for maintenance of routing tables in these protocols by avoiding excessive timely generation of routing information updates The drawback of such protocols is that the route discovery latency critically increases which leads to delay in transferring the data packets or starting communication between nodes. State-Aware Link Maintenance Approach (SALMA) combines both the reactive and proactive routing protocols to reduce the overhead on most of the nodes and increases network performance by reducing the load of network discovery flooding on active nodes.
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