Traffic Prioritization Using Packet Aggregation in Saturated WSN

Abstract

In the sensor networks, network tra c prioritization is gaining attention in the WSN community, as more and more features are being integrated these networks. Real-world deployment experience suggests that WSN brings new challenges to existing problems, such as resource constraints, low data-rate radios, and diverse application scenarios. But most of tra c prioritization problems deals with how to handle the HP (high-priority) data packet ignoring the LP (Low-Priority) data packet. Whenever any HP data packet arrives, LP data packet transmissions are suspended. This results in a loss of LP packets due to network congestion in a saturated network, weak radio signal, multi-path fading or cache over ow. We propose a framework that that will not suspend the LP data packet completely when any HP data packet has arrived. The framework will cache and aggregate the LP data packets and transmits the LP data packet after certain interval while transmitting the HP data packets. We di erentiate between the HP and LP data by leveraging transmission power di erence and radio-capture e ect. We classify the LP data tra c by using a hierarchical aggregation algorithm for data reduction of similar data. 5