A Collision Avoiding Packet Scheduling and Energy-Efficient Routing Technique for Video Wireless Sensor Networks
Nouman Bashir, Saâdi Boudjit · 2020
Being more economical in comparison to a wired network, Wireless Sensor Network (WSN) could be a good candidate for multimedia applications. Transmission is the most energy-consuming process and decisive factor for determining the lifetime of a WSN. Having an attribute of scarce energy resources and inclusion of multimedia traffic in WSN, render the development of an energy-efficient and collision avoiding routing scheme for WSN. MAC protocols based on CSMA/CA are also prone to collisions that result in a repetitive call to a back-off algorithm. In CSMA, the inclusion of a collision avoidance scheme increases the overhead and results in an underutilization of the channel and large delay incurred by the data packets. In this paper, a novel packet scheduling strategy (PSSN) is presented to diminish the chances of collisions along a single path in a shared wireless medium. The PSSN is a query-driven approach and works without RTS and CTS control signals. Each packet is scheduled after a fixed interval that is decided by the PSSN keeping in view the objective of collision reduction along a single path. To validate the proposed scheme, we simulated it in Network-Simulator-2 and compared it with well known built-in AODV and AOMDV protocols. The proposed protocol outperforms the above two with respect to energy efficiency and delays while maintaining a better throughput level.