Failure that communication becomes difficult to be connected in part of the au "4 G LTE" metropolitan area

A communication failure has occurred at 5:20 on May 29th at a terminal compatible with KDDI's high-speed data communication service "4G LTE". The target area is part of "Tokyo, Kanagawa, Yamanashi prefecture" and is currently undergoing intensive restoration. Postscript: It recovered at 23:13.

About the circumstance in which it is difficult to use the LTE data communication service of 4G LTE compatible terminal in some areas of the Kanto (as of May 29 08: 50) | Important Notice | KDDI CORPORATION
http://www.kddi.com/news/important/important_20130529085627.html


Customers using smartphones / mobile phones | News | au
http://www.notice.kddi.com/news/mainte/content/syougai/au_01_00012256.html


According to the announcement, it seems that it is difficult to use packet data communication with 4G LTE compatible terminal in the target area, cause is under investigation, but it is a pattern of equipment failure. "E-mail, Internet service can be used as usual with 3G data communication".

Au 4G LTEService that began offering from September 21, 2012In data reception at high speed of 75 Mbps at the time of reception and 25 Mbps at the maximum at the time of transmission is uri.

At the recital in October 2012, President Tanaka of KDDI said "While other companies' LTE services are partly 75 Mbps, au wants to offer 75 Mbps in all areas"And announced that it will be accelerated to 112.5 Mbps after 2013. At the moment, already part of ShikokuImproved reception speed up to 100 MbpsIt is being done.

As a communication failure of KDDI, some users using iPhone / iPad / iPad mini from April 16th to 17th will be unable to receive e-mail in real time. In this case, due to malfunction of the mail server, it is said that up to about 2.88 million units have been affected.

Of course, this time "4G LTE compatible terminal" includes iPhone 5 etc, of course,The real population coverage rate when using "4 G LTE" 75 Mbps service on iPhone 5 was 14%It is also made clear that there are feeling stepping or kicking from au's iPhone users.

Additional notes:
At 11:15 as of the present information, the cause is "equipment failure", the situation is still ongoing. There is no problem with voice call under 4 G LTE service, 3 G voice call / data communication. The impact number is expected to be about 560,000 at maximum.

About situation where it is difficult to use LTE data communication service of 4G LTE compatible terminal in some areas of Kanto (as of 11:15 May 29th) | Important Notice | KDDI CORPORATION
http://www.kddi.com/news/important/important_20130529111508.html

■ Data communication trouble in au's 4G LTE compatible model (2nd report)
(PDF file)http://www.kddi.com/corporate/news_release/pdf/20130529a.pdf

2013/05/29 13: 24
Third report on communication failure from KDDI, but it is said that obstacles are still ongoing. Although 3G data communication is available,It may be difficult to use due to concentration of usageIt is important to note that.

■ Data communication failure in au's 4G LTE compatible model (3rd report)
(PDF file)http://www.kddi.com/corporate/news_release/pdf/20130529b.pdf

2013/05/29 16: 42
As of 16 o'clock, 4 G LTE can not be used · The situation that it is hard to use continues.

About the situation that it is difficult for LTE data communication service of 4G LTE compatible terminal to be used in some areas of Kanto (As of 16:00 on May 29th) | Important Notice | KDDI CORPORATION
http://www.kddi.com/news/important/important_20130529160610.html

2013/05/29 21: 46
We have not yet announced the restoration. It's from 5:20, so 16 hours have passed.

About situation where it is difficult to use LTE data communication service of 4G LTE compatible terminal in some areas of Kanto (as of May 29 th 19:00) | Important Notice | KDDI CORPORATION
http://www.kddi.com/news/important/important_20130529192507.html

2013/05/29 23: 53
From 23:13, it is said that data communication service has become available for 4G LTE compatible models. The cause of the failure seems to be "LTE base station control device", and he continues to monitor the stability of use and check the incidental facilities.

Data communication failure in au 4G LTE compatible models (5th report)
(PDF file)http://www.kddi.com/corporate/news_release/pdf/20130529d.pdf

· Continued
For the first time in about 17 hours au's 4G LTE compatible model data communication failure recovered Completed, the impact is up to about 560,000 - GIGAZINE