Survey on Improving QoS of Cognitive Sensor Networks using Spectrum Availability based routing techniques
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Abstract
Cognitive Sensor Networks (CSNs) are significantly different from the traditional WSNs in terms of Cognitive Radio (CR) technology. According to the surrounding environment interaction, the modification of transmitter parameters is required for CSNs. However, routing is one of the important components and routing schemes are distinctive for other networks based on the spectrum-aware capability. The changeable spectrum resources should understand by the routing scheme to establish a reliable forwarding path. Because of spectrum unavailability, packet drops and the nodes’ connectivity impacts seriously by the buffer overflows. The prolonging of packet dropping impacts the data delivery rate and network lifetime. In the routing phase, this drawback addresses to improve the lifetime of a network. Based on the spectrum links power dissipation and packet drop ratio, we have studied various routing techniques for cognitive sensor networks. These methods will help in reducing the drop ratio and ensure the data that would handle using low dropping ratio nodes. Thus, the network lifetime and energy efficiency will improve.
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