QoS Aware MAC Protocol for Wireless Video Sensor Network

Abstract

Today the wireless sensor network provide services to many applications from home and industry automation to border surveillance. The technology becomes popular because required hardware is easily available at low cost. Recently the wireless multimedia network has captured researchers attention. The cameras for multimedia application are easily available at low cost. Multimedia network is capable of capturing video and audio along with scalar data. This mission critical application requires the certain level of QoS. The IEEE 802.15.4 standard provides PHY and MAC layer services to these low rate wireless personal area network application. This standard sufers from MAC unreliability problem even if network size is small. The IEEE task group gave their efforts to improve MAC performance of IEEE 802.15.4 standard. IEEE 802.15.4e standard is MAC enhancement of it. In order to reduce radio duty cycle, a novel approach is proposed. The approach helps to achieve energy efficiency. The results show that node startup time consumes the significant amount of energy. By fixing EB channels and skipping slots or entire slot frame the average consumed node power reduces compared to TSCH protocol of IEEE 802.15.4e.