Assistant Professor, DHA Suffa University
ZigBee has been widely adopted as wireless sensor network (WSN) in various industrial applications. Although it provides low-power and low-cost mesh networking, a steady and predictable network performance is not guaranteed since channel becomes the time-variant and highly attenuated from man-made obstacles and also interferences in 2.4GHz industrial, scientific, and medical (ISM) band. These degraded channel characteristics increase the number of hop and thus result in the increased packet error rate and transmission delay. In this paper, ZigBee based WSN is deployed inside an already existing duct system for intelligent waste collection in industrial environment and the Received Signal Strength Indicator (RSSI) and path losses were measured. The experimental results show that duct communication channel, acting as a waveguide, provides a more reliable and better network performance over free space channel.
Abstract: In delay sensitive applications of wireless sensor network, it is required to monitor the situation continuously with the sensors. The continuous operation and processing delay, may contribute latency in data communication. This results in more energy consumption of the sensor nodes. It is difficult to replace the battery of a sensor node, after the deployment in the network. The efficient energy management and low latency are the important issues in delay sensitive applications as they affect the life of network. There are some limitations in existing routing protocols as they are particularly designed either for energy efficiency or minimum latency. This paper presents the new protocol to overcome some drawbacks of the existing protocols. A concept of distance metric based routing is explored for shortest routing path selection. This helps to reduce the overhead of the network traffic, which results in improvement of energy efficiency and latency. The simulation results are compared with standard ‘AODV’ routing protocol. It is observed that, this ‘Dynamic Energy Efficient and Latency Improving Protocol’ will be very much suitable for wireless sensor networks in industrial control applications.
Pub.: 23 Mar '14, Pinned: 04 Oct '17