Japanology A (日本学 A)

携帯ウェブ: ウェブの一部か別世界か・The Mobile Web: A Part of the Web or a Separate World

2006 年 6月19日

http://www.sw.it.aoyama.ac.jp/2006/Japanology/lecture3.html

AGU

© 2006 Martin J. Dürst 青山学院大学

Questions we will think about today

Internet/Web Technology Structure

(bottom to top)

Packet Switching vs. Circuit Switching

Circuit Switching:

Packet Switching:

Network and Application Structure

Internet:

Phone networks:

Operators vs. Manufacturers

Operators operate mobile networks and sell their services to customers

Manufacturers produce mobile handsets, base stations, exchanges,...

In Japan, operators dictate technology and sell everything

In other countries, manufacturers agree on technology and then sell it to operators. Operators sell connectivity an services, handsets may be available separately.

Mobile Phone Generations

many interim generations (3.5, 3.75,...)

Japan has been "out of sync" for a long time

WAP

Reasons for WAP failure

i-Mode

Mobile Web service by NTT DoCoMo

Official vs. Original Sites

'Official' sites:

'Original' sites:

The Web for Everybody

Future Developments

Homework

Submit to 国際交流センター by Monday, July 3rd, 14:00)

Size: A4, two sheets maximum, use one or both sides