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4.0×1011 PLTs were considered as double dose SDPs and split. WBCs were determined microscopically in 170 SDPs. SDPs with a leukocyte content <1.0×106 were labelled as leukodepleted and no further WBC filtration was recommended.
doi:10.1016/j.comnet.2007.09.018 
Copyright © 2007 Elsevier B.V. All rights reserved.
Energy-efficient middleware-layer multi-radio networking: An assessment in the area of service discovery
Available online 1 October 2007.
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Abstract
The massive deployment of mobile networks together with the emergence of powerful portable devices has given rise to pervasive computing environments. In such environments, mobile users may discover and access services offered in surrounding networks using Service Discovery Protocols (SDPs). However, several SDPs are currently in use, each one designed for a specific target network architecture and setting. As a result, in today’s multi-radio networking environment, SDPs do not equally suit each radio interface. In order to provide effective service discovery in multi-radio networks, the most resource-efficient radio interface should be chosen with respect to two main criteria: the adequacy of the interface against the SDP to be used, and energy saving, which is crucial for battery-powered devices. Toward this goal, this article assesses how to effectively take advantage of the multiple radio interfaces now embedded within wireless devices with respect to energy consumption, from the standpoint of service discovery and access. It further investigates the adequacy of legacy SDPs with the various networks, so as to classify the most appropriate networks for each SDP. Exploitation of these results is finally investigated with the description of an energy-efficient algorithm for SDP-based context sensing in a multi-radio pervasive environment.
Keywords: B3G networks; Context awareness; Energy consumption; Service discovery
Article Outline
- 1. Introduction
- 2. Assessing multi-radio based service discovery with respect to energy consumption
- 2.1. Measurements for passive discovery
- 2.2. Measurements for active discovery
- 2.3. Measurements for services access with sustained transfers
- 2.4. Energy-efficient service discovery and access in multi-radio networks
- 3. Assessing existing SDPs in multi-radio networking environments
- 3.1. SDP features
- 3.2. Properties of the radio interfaces
- 3.3. Assessing the adequacy of SDPs against radio interfaces
- 3.4. Matching SDPs against radio interfaces
- 4. Energy-efficient SDP-based context sensing in multi-radio networks
- 4.1. SDP-based context sensing over the multi-radio network
- 4.2. SDP monitoring
- 4.3. Selection of a globally-efficient service discovery configuration
- 4.4. SDP combination and scheduling
- 5. Conclusions
- Acknowledgements
- References
- Vitae
