Mobile Marketing Data Laboratory recently conducted a study into data packet congestion in LTE 4G networks in Tokyo. Packet congestion was defined in this survey as when on an LTE connection the web page under test – Yahoo! Japan’s top page was used – fails to completely load within 30 seconds.
Between the 10th and 14th of June 2013 the investigation team visited the six busiest stations on the Tokyo Yamanote line, choosing two spots on each to test, during both the morning peak period of 7 am to 9 am, and evening peak of 5 pm to 7 pm. 100 connections were made from each collection point, for a total of 1,200 tests for each phone.
Specifically, the stations and locations were Shinjuku South and East entrances, Ikebukuro in front of South ticket wicket and Seibu East entrance, Shibuya in front of Tamagawa ticket wicket and Hikarie entrance, Tokyo Yaesu Central entrance and Marunouchi North entrance, Shinagawa Minato South entrance and Central ticket wicket, and Shinbashi Kasumori entrance and SL Plaza. For the tests, au and SoftBank iPhone 5s tested out Apple connections, and Android was represented by docomo’s Xperia Z, au’s HTC J butterfly, and SoftBank’s Aquos Phone Xx.
Instead of a graph, here’s Shinbashi’s SL Plaza:
SL is the abbreviation used in Japan for Steam Locomotive, as you might have guessed!
1. iPhone 5 packet congestion rates
Station au iPhone 5 congestion rate SoftBank iPhone 5 congestion rate Shinjuku 40.0% 3.0% Ikebukuro 9.5% 2.0% Shibuya 3.0% 0.0% Tokyo 5.0% 0.0% Shinagawa 52.5% 9.0% Shinbashi 12.5% 0.0% Total 20.4% 2.3%
2. iPhone 5 page load time
Station au iPhone 5 page load time SoftBank iPhone 5 page load time Shinjuku 18.11 seconds 5.50 seconds Ikebukuro 8.24 seconds 4.84 seconds Shibuya 6.46 seconds 3.74 seconds Tokyo 7.49 seconds 4.15 seconds Shinagawa 18.32 seconds 7.94 seconds Shinbashi 9.64 seconds 3.28 seconds Total 11.38 seconds 4.91 seconds
By time of day, au was about 50% slower in the evening, versus about 20% for SoftBank. By day of the week, Monday and Friday mornings were slower than the mid-week mornings for both carriers, and Friday evening was the slowest overall for au.
3. Android packet congestion rates
Station docomo Xperia Z congestion rate au HTC J congestion rate SoftBank Aquos Phone Xx congestion rate Shinjuku 4.0% 0.0% 0.0% Ikebukuro 17.5% 0.0% 0.0% Shibuya 2.0% 0.0% 0.0% Tokyo 3.5% 0.0% 0.0% Shinagawa 0.0% 0.0% 0.0% Shinbashi 2.5% 0.0% 0.0% Total 4.9% 0.0% 0.0%
4. Android page load time
Station docomo Xperia Z page load time au HTC J page load time SoftBank Aquos Phone Xx page load time Shinjuku 6.27 seconds 2.47 seconds 3.30 seconds Ikebukuro 8.96 seconds 3.16 seconds 5.12 seconds Shibuya 4.78 seconds 2.76 seconds 3.76 seconds Tokyo 8.06 seconds 2.98 seconds 3.46 seconds Shinagawa 4.00 seconds 3.28 seconds 3.86 seconds Shinbashi 5.08 seconds 3.24 seconds 4.19 seconds Total 6.19 seconds 2.98 seconds 3.95 seconds
It was difficult to see any obvious trend by time of day or weekday here.