Abstract
Quality of Service (QoS) is important in the application of target tracking in wireless sensor networks (WSNs). When a target appears, it will trigger an event from one or more sensors. A target can only be accurately detected if a certain number of event packets are received by the sink in a predetermined detection time interval. In this paper, we propose a buffer management scheme based on event ordering to achieve QoS. We also propose a directional QoS-aware routing protocol (DQRP) for the dissemination of the event ordering list. After the dissemination, a priority queue buffer management scheme is used to ensure QoS. Our buffer management scheme works in conjunction with DQRP to ensure accurate as well as energy-efficient target detection in the presence of multiple targets. The novelty of our network architecture is that a distributed admission control scheme is implemented on each node based on a geographic routing algorithm. In our scenario, a target can only be accurately detected if a certain number of event packets are received by the sink in a predetermined detection time interval. Our main performance metric is the number of targets/events being detected. Our protocol maximizes the number of targets being detected.
Highlights
With the advancements in wireless communications and the development of small electronic sensing devices, wireless sensor network (WSN) technology was greatly developed in the past few years
To solve the above problems, we propose a Quality of Service (QoS)-aware network architecture designed to be used in multi-hop and multi-sink WSNs
We simulate a network consisting of 25 nodes with directional QoS-aware routing protocol (DQRP) and using priority buffer management scheme based on event ordering
Summary
With the advancements in wireless communications and the development of small electronic sensing devices, wireless sensor network (WSN) technology was greatly developed in the past few years. A WSN comprises a large number of densely deployed sensing devices to sense the phenomenon or the occurrence of an event. Sensor nodes may be required to do data aggregation and fusion locally. The sensor nodes are required to report their measurements to the sink. Similar to the traditional end-to-end networks, communications in WSN suffer from delay and loss. Quality of Service (QoS) support is required to ensure the performance of a network. The QoS in traditional computer networks is generally defined as the performance level of a network service offered to the user, QoS centers on network quantities such as delay, loss and reliability
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