Waleed Alsalih

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The proliferation of wireless sensors has given rise to public sensing (PS) as a vibrant data-sharing model. This vision can be extended under the umbrella of the Internet of Things (IoT) to include versatile data sources within smart cities such as cell phones, radio frequency identification tags and sensors on roads, and buildings and living spaces. The(More)
The Internet of Things (IoT) represents an evolutionary vision that promises to identify and connect physical objects and devices. This vision faces many challenges in terms of integrating technologies, especially RFID-sensor networks (RSNs). In this paper, we introduce a framework for node deployment and delaytolerance in RSNs under the IoT paradigm. Our(More)
Deployments of Radio Frequency Identification (RFID) networks are anticipated to be dense and ad-hoc. These deployments usually involve redundant readers having overlapping interrogation zones and, hence, causing immense reader collisions. Elimination of redundant readers, from the network, is of utmost importance as otherwise they affect the lifetime and(More)
Radio Frequency Identification (RFID) is an emerging wireless technology that poses new fundamental challenges. Coverage in RFID networks, which is one of these challenges, is the ability to accurately read a set of RFID tags. Accurate coverage is of utmost importance in RFID networks as missing some tags may result in missing important events and, for some(More)
Due to energy constraints in individual sensor nodes, extending the lifetime is an essential objective in wireless sensor networks (WSNs). Several proposals have aimed at that objective by designing energy efficient protocols at the physical, medium access, and network layers. While the proposed protocols achieve significant energy savings for individual(More)
For the sake of maximizing the network lifetime, we propose a novel placement scheme for mobile data collectors in Underwater Acoustic Sensor Networks (UASNs). Our scheme is based on a 3D architecture, in which on-the-surface data collectors gather data from underwater sensors and relay them to an on-shore sink. We divide the lifetime of the network into(More)
In this paper, we propose a distributed scheme for data gathering using a mobile data collector in Wireless Sensor Networks (WSNs). In our scheme, a mobile data collector moves along a predefined track over the sensing field and data are forwarded to nodes whose transmission disks overlap with the trajectory of the data collector; these nodes are called(More)
In this paper, we look into the problem of distributing computational tasks amongst a set of mobile computing devices in a mobile wireless ad hoc network (MANET) in such a way that conserves energy and improves performance. In such a distributed environment, the assignment of computational tasks to different devices and the order of their execution play a(More)
Tag collisions can impose a major delay in radio frequency identification (RFID) systems. Such collisions are hard to overcome with passive tags due to their limited capabilities. In this paper, we look into the problem of minimizing the time required to read a set of passive tags. We propose a novel approach, the distance-based clustering, in which the(More)