Where-Fi: a dynamic energy-efficient multimedia distribution framework for MANETs

Shivajit Mohapatra; Bogdan Carbunar; Michael Pearce; Rohit Chaudhri; Venu Vasudevan

doi:10.1117/12.775134

28 January 2008 Where-Fi: a dynamic energy-efficient multimedia distribution framework for MANETs

Shivajit Mohapatra, Bogdan Carbunar, Michael Pearce, Rohit Chaudhri, Venu Vasudevan

Proceedings Volume 6818, Multimedia Computing and Networking 2008; 68180K (2008) https://doi.org/10.1117/12.775134
Event: Electronic Imaging, 2008, San Jose, California, United States

Abstract

Next generation mobile ad-hoc applications will revolve around users' need for sharing content/presence information with co-located devices. However, keeping such information fresh requires frequent meta-data exchanges, which could result in significant energy overheads. To address this issue, we propose distributed algorithms for energy efficient dissemination of presence and content usage information between nodes in mobile ad-hoc networks. First, we introduce a content dissemination protocol (called CPMP) for effectively distributing frequent small meta-data updates between co-located devices using multicast. We then develop two distributed algorithms that use the CPMP protocol to achieve "phase locked" wake up cycles for all the participating nodes in the network. The first algorithm is designed for fully-connected networks and then extended in the second to handle hidden terminals. The "phase locked" schedules are then exploited to adaptively transition the network interface to a deep sleep state for energy savings. We have implemented a prototype system (called "Where-Fi") on several Motorola Linux-based cell phone models. Our experimental results show that for all network topologies our algorithms were able to achieve "phase locking" between nodes even in the presence of hidden terminals. Moreover, we achieved battery lifetime extensions of as much as 28% for fully connected networks and about 20% for partially connected networks.

Citation Download Citation

Shivajit Mohapatra, Bogdan Carbunar, Michael Pearce, Rohit Chaudhri, and Venu Vasudevan "Where-Fi: a dynamic energy-efficient multimedia distribution framework for MANETs", Proc. SPIE 6818, Multimedia Computing and Networking 2008, 68180K (28 January 2008); https://doi.org/10.1117/12.775134

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