The case for elastic access

Alperovich, Timur; Noble, Brian

doi:10.1145/1859983.1859991

Cited by 5 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, Resumption Agent does require replica servers, and is compatible with most existing servers, while handling the challenges of dynamic content and secure HTTPS connections. Recently Alperovich and Noble [32] have proposed to improve Wi-Fi performance for PC clients by switching and balancing connections between multiple Wi-Fi access points (APs), e.g., as enabled through Virtual Wi-Fi [33]. They also retain pre-existing connections on their original AP, while assigning new connections to new APs.…”

Section: B Related Workmentioning

confidence: 99%

Seamless TCP Migration on Smartphones without Network Support

Rahmati

Shepard

Tossell³

et al. 2014

IEEE Trans. on Mobile Comput.

View full text Add to dashboard Cite

Abstract-Is it possible to migrate TCP/IP flows between different networks on modern mobile devices without infrastructure support or protocol changes?To answer this question, we make three research contributions. (i) We report a comprehensive characterization of IP traffic on 27 iPhone 3GS users for three months. (ii) Driven by these findings, we devise two simple, effective, and easily deployable system mechanisms to support seamless flow migration without network support, and extensively evaluate their effectiveness using our field collected traces of real-life usage. Wait-n-Migrate leverages the fact that most flows are short lived. It establishes new flows on newly available networks but allows pre-existing flows on the old network to terminate naturally. Resumption Agent takes advantage of the resumption functionality of modern protocols to securely resume flows without application intervention. Combined, they provide an unprecedented opportunity to immediately deploy policies that leverage multiple networks to improve the performance, efficiency, and connectivity of mobile devices. (iii) We report an iPhone based implementation of these system mechanisms and demonstrate their overhead to be negligible. Furthermore, we employ a sample switching policy, AutoSwitch, to demonstrate their performance. Through traces and field measurements, we show that AutoSwitch reduces user disruptions by an order of magnitude.Index Terms-Mobile Computing, Network Architecture and Design, User/Machine Systems ---------- ----------

show abstract

Section: B Related Workmentioning

confidence: 99%

Seamless TCP Migration on Smartphones without Network Support

Rahmati

Shepard

Tossell³

et al. 2014

IEEE Trans. on Mobile Comput.

View full text Add to dashboard Cite

show abstract

“…Due to page limitations, we present the details of this experiment in our technical report in [19]. We notice that the proposed switching technique may also be applicable to other applications, e.g., Alperovich and Noble [20] propose a similar technique to switch among homogeneous WiFi access points, which is quite different from MultiNets.…”

Section: B Switching In Multinetsmentioning

confidence: 99%

MultiNets: Policy Oriented Real-Time Switching of Wireless Interfaces on Mobile Devices

Nirjon

Nicoarã²,

Hsu

et al. 2012

2012 IEEE 18th Real Time and Embedded Technology and Applications Symposium

View full text Add to dashboard Cite

Abstract-In this paper we present MultiNets, a system which is capable of switching between wireless network interfaces on mobile devices in real-time. MultiNets is motivated by the need of smartphone platforms to save energy, offload data traffic, and achieve higher throughput. We describe the architecture of MultiNets and demonstrate the methodology to perform switching in Linux based mobile OSes such as Android. Our analysis on mobile data traces collected from real users shows that with real-time switching we can save 27.4% of the energy, offload 79.82% of the data traffic, or achieve 7 times more throughput on average. We deploy MultiNets in a real world scenario and our experimental results show that depending on the user requirements, it outperforms the state-of-the-art Android system either by saving up to 33.75% energy, or achieving near-optimal offloading, or achieving near-optimal throughput while substantially reducing TCP interruptions due to switching.

show abstract

“…We empirically derive that, a timeout value of 30 seconds or more makes this interruption a rare phenomena. We notice that the proposed switching technique may also be applicable to other applications, e.g., Alperovich and Noble [99] propose a similar technique to switch among homogeneous WiFi access points, which is quite different from MultiNets.…”

Section: Connection-oriented Sessionsmentioning

confidence: 99%

A General-Purpose, Energy-Efficient, and Context-Aware Acoustic Event Detection Platform for Mobile Devices

Nirjon¹

View full text Add to dashboard Cite

Humans are extremely capable of remembering, recognizing, and acting upon hundreds of thousands of different types of acoustic events on a day-to-day basis. Decades of research on acoustic sensing have led to the creation of systems that now understand speech, recognizes the speaker, and finds a song. However, apart from speech, music, and some application specific sounds, the problem of recognizing varieties of general-purpose sounds that a mobile device encounters all the time has remained unsolved. The overarching goal of this research is to enable rapid development of mobile applications that recognize general-purpose acoustic events. As these applications are meant to run on a mobile device, the technical goals of this research include -energy-efficiency, communication-efficiency, leveraging the user contexts such as the location and position of the mobile device in order to improve the classification accuracy, and ease of application development.With this goal in mind, we have built a general-purpose, energy-efficient, and context-aware acoustic event detection platform for mobile devices called -the Auditeur platform. Auditeur enables mobile application developers to have their application register for and get notified on a wide variety of acoustic events. Auditeur is backed by a cloud service to store crowd-contributed sound clips and to generate an energy-efficient and context-aware classification plan for the mobile device. When an acoustic event type has been registered, the mobile device instantiates the necessary acoustic processing modules and wires them together to dynamically form an acoustic processing pipeline in accordance with the classification plan. The mobile device then captures, processes, and classifies acoustic events locally and efficiently.Our analysis on user-contributed empirical data shows that Auditeur's energy-aware acoustic feature selection algorithm is capable of increasing the device-lifetime by 33.4%, sacrificing less than 2% of the maximum achievable accuracy.We implement seven applications with Auditeur, and deploy them in real-world scenarios to demonstrate that Auditeur is versatile, 11.04% 441.42% less power hungry, and 10.71% 13.86% more accurate in detecting acoustic events, compared to state-of-the-art techniques. We perform a user study involving 15 participants to demonstrate that even a novice programmer can implement the core logic of an interesting application with Auditeur in less than 30 minutes, using only 15 20 lines of Java code.Besides Auditeur, three other systems have been developed in this research which empower some aspects of the platform. First, we introduce sMFCC, which is an approximation to a well-known acoustic feature called the Meli Abstract ii frequency cepstral coefficient (MFCC). The motivation behind sMFCC is to enable faster extraction of MFCC features in applications that must sample the microphone at a very high rate and yet has to meet the real-time requirement.Second, we have developed the MultiNets, which is capable of switch...

show abstract

The case for elastic access

Cited by 5 publications

References 8 publications

Seamless TCP Migration on Smartphones without Network Support

Seamless TCP Migration on Smartphones without Network Support

MultiNets: Policy Oriented Real-Time Switching of Wireless Interfaces on Mobile Devices

A General-Purpose, Energy-Efficient, and Context-Aware Acoustic Event Detection Platform for Mobile Devices

Contact Info

Product

Resources

About