Browsing by Subject "Ubiquitous computing"

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Open Access
A performance comparison of zone-based multicast protocols for mobile ad hoc networks
(IEEE, 2003) Zhang, Y.; Rangnekar, A.; Selçuk, Ali A.; Bicak, A.; Sidhu, D.
With the current trend toward ubiquitous computing come wireless devices capable of forming the nodes of mobile ad hoc networks. Such networks typically rely on routing protocols in order to communicate messages from a source node to a destination node through a set of intermediary nodes. In a typical ad hoc environment, mobile nodes mostly work as a group and are involved in collaborative computing. Multicast communication is more effective in these scenarios. This paper presents the comparison of the performance of two zone-based multicast routing protocols. Shared-tree MZR is a shared tree variant of the Multicast Routing Protocol based on Zone Routing (MZR). We compare the two variants and analyze their performance under various network conditions. The test results show that Shared-tree MZR protocol performs well and has significantly low overhead in scenarios with multiple sources. ©2003 IEEE.
Open Access
Sensors as media and sensor-mediated communication: an introduction to the special issue
(Oxford University Press, 2023-08-23) Özkul, Didem; Halegoua, G. R.; Wilken, R.; Humphreys, L.
This special issue examines mediated communication through the rise of sensors. Sensors are increasingly in the phones we carry, in the cars we drive, and throughout the homes and communities in which we live. In this introduction to the special issue, we define sensor-mediated communication (SMC) and argue the embedded, automatic, and datafied nature of sensors belie the glitches and biases in sensor mechanisms, networks, and infrastructure. The collection of articles in this issue explores SMC across a variety of contexts and cases, including municipal infrastructure, community, health, industry, and the domestic. They represent studies of voice assistants, self-tracking apps, self-driving cars, fitness games, home health care, as well as municipal sensor networks in urban, indigenous, and rural communities. Across them all we see the different ways through which mediated communication is initiated, transformed, and maintained by sensing technologies. Together they represent an important evolution in the study of computer-mediated communication.