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なぜ信頼区間がモバイル・ネットワーク・エクスペリエンスの分析に不可欠か

Posted: Feb 13, 2019

科学実験の世界には、精密測定というものはありません。むしろ、標準的な科学的アプローチでは信頼度を扱います。信頼度が高いものを高い精度で言明できるわけですが、いくら精密に測定しても絶対数で表せるところまで達することは決してありません。科学者はこの精度を「信頼区間」と呼ばれるもので表現します。世界中のあらゆる業界や領域で採用されている規格です。日常生活で信頼区間の最も良く知られている例が、よく世論調査で開示される 誤差の範囲 です。

Multiple operators across the globe hit simultaneously by Ericsson network outage

Posted: Dec 11, 2018

OpenSignal has identified that December 6th’s mobile network outage hit multiple operators at the same time across the globe.

Analyzing availability data for 2G, 3G and 4G mobile technologies across hundreds of networks, we found three operators where smartphone users experienced a significant and sudden drop in LTE availability: Mobifone in Vietnam; SoftBank in Japan; and O2 in the UK.

With new models, Apple will raise mobile network speeds

Posted: Sep 10, 2018

In 2018, Apple is on the “speed” or “S” year in its normal two-year iPhone update cycle: Apple usually launches a new iPhone design one year, then the next year it keeps the exterior design the same but updates the iPhone’s components to deliver faster performance. Historically, Apple has focused on the speed of its application processor or graphics; we believe it’s now time for Apple to talk about mobile network speeds as well.

Becoming an industry standard: Lessons learned from JD Power

Posted: Sep 06, 2018

Today it seems second nature to consult an independent standard before making an important choice. We regularly appeal to consumer ratings before choosing a hotel, movie critics before a trip to the cinema or an independent surveyor before purchasing a house. But it wasn’t always so. In fact, just a couple of decades ago independent reviews of quality were hard to come by. In many cases, the only source of information would be the suppliers you were trying to choose between, who conducted their own studies and tests that were subject, of course, to a glaring conflict of interest.

The US may yet catch its global peers in 4G speeds

Posted: Aug 17, 2018

OpenSignal recently published its State of Mobile Networks report for the U.S., and in it we tracked some significant increases in 4G speed across the country's mobile networks. The most interesting speed results we saw weren't on the national level; rather, they were in big cities. In New York City, Chicago, Detroit, Minneapolis, Cleveland and Kansas City we measured average LTE download speeds of 30 Mbps or greater on Verizon or T-Mobile (in some cases both).