Improved QoS for the Sensed Data in the Wireless Sensor Network through Customized Priority Scheduling Scheme

Abstract

Wireless sensor networks are mainly deployed to monitor the environmental conditions and to transfer the sensed data to the destination. The environmental conditions are monitored periodically to identify the abnormal activities in the environment. The timely detection of the environmental changes will protect the humankind from various calamities like earthquake, fire accidents etc. Thus these sensed data need to be transmitted to the destination within the short period of time only then timely countermeasures can be taken to protect the humankind. These time critical data need to suffer from no delay in the network. But the wireless network is prone to data loss due to the wireless nature and the mobility of the nodes. Thus to avoid the delay and the dropping of the sensed data, the sensed data can be scheduled before transmission. The scheduling can transfer the packets in some order avoiding the packet drop problems and the priority can be given to the packets. So the time constrained packets can be scheduled to transmit first. This avoids the delay of time sensitive data to be reached in the destination. This paper deals with the various scheduling schemes that can be opted in the wireless network and the pros and cons of using each scheduling scheme is also discussed. The proposed customized priority scheduling scheme improves the quality of service of the sensed data when compared with the other scheduling schemes.