Sunday, December 6, 2015

Microsoft iOS App Detects Mobile Bottlenecks

A paper by Nimantha BaranasuriyaVishnu Navda [pictured], Venkata N. Padmanabhan, Microsoft, and Seth GilbertDepartment of Computer Science National University of Singapore presents a tool (iOS app) helping to locate the bottleneck in a cellular service - which is not always in the wireless segment.


Mobile communication is often frustratingly slow. When a user encounters poor performance, and perhaps even “confirms” the same by running a speed test, the tendency is to ascribe blame to the user’s last-mile provider. However, as we argue in this paper, a more nuanced approach is needed to identify the location of the bottleneck responsible for the poor performance. Specifically, we focus on the question of whether the bottleneck lies in the cellular last hop (3G or LTE link) or elsewhere in the WAN path.

We present QProbe, a tool that takes advantage of the proportional fair (PF) scheduler employed in cellular networks to determine whether queuing is happening at the cellular link. After validating QProbe through simulations and controlled experiments, we present our findings from a measurement study conducted over a 2 month period involving over 600 real-world users across 51 operator networks in 33 countries. We find that, for example, the cellular last-hop link is the bottleneck in 68.9% and 25.7% of the total bottleneck cases for 3G and LTE clients, respectively, suggesting that there is a significant fraction of cases where the poor performance experienced by the user is due to the WAN and could potentially be routed around. Moreover, we show that QProbe detects the bottleneck link location with greater than 85% accuracy for both 3G and LTE clients in our measurement study.

Following are the results of QProbe test, on an iPhone 6, taken at my home in Tel-Aviv (Saturday morning, in a quiet neighborhood, is probably not the best time to diagnose bad connections):

See "QProbe: Locating the Bottleneck in Cellular Communication" - here.


  1. Thanks for sharing information.
    online recharge
    Existing customers can avail the tariff benefit of ALL LOCAL CALLS at 25P/min for 3 months on Special Tariff voucher (STV)priced at Rs 38 only in Haryana.

    1. Great Article android based projects

      Java Training in Chennai

      Project Center in Chennai

      Java Training in Chennai

      projects for cse

      The Angular Training covers a wide range of topics including Components, Angular Directives, Angular Services, Pipes, security fundamentals, Routing, and Angular programmability. The new Angular TRaining will lay the foundation you need to specialise in Single Page Application developer. Angular Training

  2. Great article, resonated with me from start to finish. Am a iOS applications developer at iPhone APP Development Company.

  3. thanks for sharing! you can read more about mobile app development Singapore in case you are interested in the field :)

  4. It is very excellent and helpful article. Excepting from you more and more

  5. Thanks for sharing this knowledgeable things by your blog. If you need website designing services, visit our website at Ogen Infosystem and get a responsive website design for you. We also provide digital marketing services, like- PPC, SEO, Facebook Marketing etc.
    Website Designing Company in India

  6. Awesome blog, Get the best Mutual Fund Advisor and Best Performing Mutual Funds Company by Mutualfundwala in Delhi, India.
    Best Performing Mutual Fund

  7. Well written articles like yours renews my faith in today's writers. The article is very informative. Thanks for sharing such beautiful information.
    Mobile App Development Company In Chennai
    Android App Development Company In Chennai
    Android Application Development Company In Chennai
    Mobile App Development Company In India

  8. Nice blog, thank you so much for sharing with us this informative blog.
    Lifestyle Magazine India

  9. Thanks for this informative blog, visit Kalakutir Pvt Ltd for School Bus Painting and Warehouse Zebra Painting.
    Warehouse Zebra Painting

  10. Thank you so much for sharing! You can read more about mobile app development agency Singapore, if you are interested in the field.

  11. Thank you so much for this amazing information sharing with us. Visit Appslure WebSolution for the best mobile app development company in Gurgaon
    Mobile app development company in gurgaon

  12. PHP advancement is a well-known scripting language that is utilized to make intelligent and dynamic sites. Today, most business sites are made by utilizing php application development as it accompanies profoundly practical highlights and ease of use. So, organizations ready to make a customer's site with amazing information the executives highlights will require to recruit php development company. Our prime php website development improvement administrations start with understanding the client needs and stretches out to database driven top of the line custom undertaking web frameworks. Recruit devoted PHP engineers from Colan Infotech to plan php web development utilizing Photoshop, Flash etc. The php development India advancement administrations we offer are recorded underneath:

  13. Hire Asp .Net Developer has the propelled aspect of Micro's.Net structure and it is viewed as the best application system for building dynamic sites and online applications. Subsequently the cutting edge development companies advancement organizations that have dynamic website specialists and online application engineers profoundly depend on this. The accompanying focuses made ASP .Net a default decision for everybody. asp .net web development company (articulated speck net) is a system that gives a programming rules that can be utilized to build up a wide scope of uses – from web to portable to Windows-based applications. The dot net development companies in chennaisystem can work with a few programming dialects, for example, C#, VB.NET, C++ and F#. At Grand Circus, we use C#.

  14. The best php development company company in India. We contribute high quality custom php development services from our well-trained team. Get to know more about the php web development company Reach us or just give a call to us for php development.

  15. Hello,
    This is a amazing article, you describe everything in details and it's thoughtful information. we also working on Web Development & App Development. Thanks For all information.
    For more info visit us :

  16. Amazing blog with unique information found valuable and enjoyed reading this one. Keep posting. Thanks for sharing.
    Data Science Training in Hyderabad

  17. Great article with unique information found useful looking forward for next blog thank you.
    typeerror nonetype object is not subscriptable

  18. Top-quality blog with unique content and information shared was valuable looking forward to the next updated thank you.
    Ethical Hacking Course in Bangalore