New PDF release: Middleware 2012: ACM/IFIP/USENIX 13th International

By Ngoc Do, Cheng-Hsin Hsu, Nalini Venkatasubramanian (auth.), Priya Narasimhan, Peter Triantafillou (eds.)

ISBN-10: 3642351697

ISBN-13: 9783642351693

ISBN-10: 3642351700

ISBN-13: 9783642351709

This ebook constitutes the refereed court cases of the ACM/IFIP/USENIX thirteenth foreign Middleware convention, held in Montreal, Canada, in December 2012. The 24 revised complete papers awarded have been rigorously reviewed and chosen from a hundred twenty five submissions. The papers are geared up in topical sections on cellular middleware; tracing and prognosis; structure and function; publish/subscribe middleware; and big-data and cloud computing; availability, safety and privacy.

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Read or Download Middleware 2012: ACM/IFIP/USENIX 13th International Middleware Conference, Montreal, QC, Canada, December 3-7, 2012. Proceedings PDF

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Extra info for Middleware 2012: ACM/IFIP/USENIX 13th International Middleware Conference, Montreal, QC, Canada, December 3-7, 2012. Proceedings

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7 Related Work and Concluding Remarks Modern mobile phones have been extended to incorporate multiple networking interfaces beyond traditional cellular and WLAN capabilities; this enables them to form opportunistic networks using technologies such as WiFi Direct [2], WiFi Tether [1] and Bluetooth. Opportunistic networks complement infrastructure networks with new capabilities to support throughput enhancement [13, 21] and CrowdMAC: A Crowdsourcing System for Mobile Access 19 peer-to-peer cellular traffic offloading [14,16,19].

The e-mail app uses the alarm functionality of Android to ensure that the CPU is woken up. sleep instead of alarms. At event (a), the CPU goes to sleep because there are no wake locks preventing it from doing so. With the CPU sleeping, the Pogo thread is no longer running. At event (b), the alarm set by the e-mail app fires and the CPU is brought out of sleep mode. The Pogo thread continues and is eventually unblocked when its timer runs out. It can then detect the network traffic and push out its own data.

The 3G ramp-up starts at a. After data transmission has ended (point b), the modem stays in high-energy mode (DCH) for approximately six seconds until c. 5 seconds between c and d. The small spikes before a and after d are due to the duty cycling of the modem. 2 on the KPN network. taken from a Samsung Galaxy Nexus smartphone. The event marked a shows the modem being triggered by a transmission (in this case the phone checking for new e-mail). It takes several seconds for the actual transmission to begin as the modem negotiates a private channel with the cell tower, leading to the so-called ramp-up time.

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Middleware 2012: ACM/IFIP/USENIX 13th International Middleware Conference, Montreal, QC, Canada, December 3-7, 2012. Proceedings by Ngoc Do, Cheng-Hsin Hsu, Nalini Venkatasubramanian (auth.), Priya Narasimhan, Peter Triantafillou (eds.)


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