Revolutionary Wireless Internet Technology
What is i-mode?
- Introduction to i-mode
- i-mode and mobile technology today
- i-mode Development
- i-mode’s Business Model
- Future of i-mode
- Service across a wireless network which enables handheld devices (such as cell phones) to access the Internet
- Mobile internet service offered by NTT DoCoMo
- Introduced in February 1999
- Extremely popular in Japan and expanding into Europe
- As of March 31st, 2002, there are approximately 32,150,000 subscribers (in Japan)
Quick Note: Invented by Mari Matsunaga What Can I do With i-mode ?
A Look at an i-mode Device
- Email (the “killer app”)
- Chat, Games
- Access to information
- Transaction Content
- Money Transfer, Balance Check, Ticket Reservation…
- Information Content
- News updates, sports news, stock quotes…
- Database Content
- Restaurant Guide, Telephone Directory…
i-mode Transmission System
- Currently an i-mode device is an equivalent of a very low-end computer
- Additional buttons : directional, select and the i button.
- Must have an iHTML browser.
- Menu based interface (i-Menu)
- Try typing in a URL => It’s not easy!
i-mode vs WAP
- Packet - switching network – information divided into packets when sent and reassembled when received by the i-mode user => faster.
- i-mode users pay by volume of data downloaded.
- Code Division Multiple Access – method for allocating wireless channel (9.6kbps)
Comparing WAP and imode is not straightforward!
I-mode's security concerns/solutions
- i-mode – packet switching network
- Handset contains IP stack
- Communicates directly using iHTML web sites, through DoCoMo’s relay centers
- WAP – protocol originally implemented on a circuit switched network
- Can be packet switched e.g. GPRS
- Requires gateway if required to communicate using TCP/IP
- Can WAP support streaming video?
- Both i-mode and WAP will be supporting XHTML
- Concern: prank/redirected calls
- Use SSL since version 3.0 since the medium is the internet and iHTML
- Java is more secure and only delegates resources to "trusted" servers
- Has partnered with major corporations including some Japanese and some in America and Europe
- As of version 3.0, i-mode has 128-bit encryption
- The i-mode handset (Java enabled) use the KVM.
- Sun has ported the J2ME to i-mode.
- All Java Network operations in done via HTTP
- Other companies are porting applications for development including Macromedia, WapProfit, SEGA...
- It may even be possible to make your own movies that will be playable with 3G and 4G networks through FOMA
- Originally named cHTML (compact).
- No jpegs, tables, image maps, frames, style sheets, cookies, fonts
- Handles GIFs, MIDI, and Java (iAppli)
Future of i-mode
- Basic plan:
- Packet plan – 200¥/month
- i-mode plan – 100¥/month
- Optional FOMA (3G) – 100¥/month
- 400 packets free each month (doesn’t include voice)
- 0.27¥ per packet
- Typical day, 1) access main menu = 3¥. 2) what’s new = free 3) check the news = 28¥. 4) mobile banking = 100¥ 5) order food from restaurant = 40¥ 6) send and receive mail = 50¥
- Add it all up, (221¥) x 30 days + 300¥ monthly charge = 6930¥ = $70 US.
- Does not include talk time.
- Currently, transfer rate is 9600 kbps.
- 3G which is released next year, (new version of i-mode), transfer rate 2 Mbps with streaming video and audio
- 4G (released in 2006), transfer rate is 20 MBps
Linksi-mode Interactive Demo
i-mode iHTML Emulator