1. A Survey of Application Protocols for Wireless Devices Éric Lesage

2. 2000-12-04Éric Lesage2 Introduction SMS HDML I-mode WAP LEAP Summary Conclusion

3. 2000-12-04Éric Lesage3 SMS (Short Message Service) Used to send messages from one device to another Gateways from and to Internet e-mail Very popular, particularly in Europe

4. 2000-12-04Éric Lesage4 HDML (Handheld Device Markup Language) INFOSPACE My InfoSpace Directories Finance Sports Entertainment News Weather Directions DIRECTORIES White Pages Yellow Pages Reverse Lookup Finders

5. 2000-12-04Éric Lesage5 I-mode ( ｶ ) ﾕｰﾛﾃｸﾉﾛｼﾞｰ ﾕｰﾛﾃｸﾉﾛｼﾞｰ eurotechnology ● メニュー： &#63879 欧州のページ &#63880 会社案内 &#63881 English <A href=mailto:@docomo.ne.jp? body=http://www.eurotechnology.com/i/index.html> 友達に紹介 ©2000 ﾕｰﾛﾃｸﾉﾛ ｼﾞｰ

6. 2000-12-04Éric Lesage6 WAP (Wireless Application Protocol) The most widely-known solution (but not the most widely used) Works on practically any bearer (including non-IP) Complete protocol stack (not just application level) Heavily criticized

7. 2000-12-04Éric Lesage7 LEAP (Lightweight and Efficient Application Protocol) “Underdog effort”: unlike WAP, no massive corporative support Focus on messaging solutions Works using a binary remote procedure call protocol (ESRO: efficient short remote operation protocol) Using EMSD (Efficient Mail Submission and Delivery Protocol), sending a short message requires 3 transmission, instead of at least 9 using TCP and SMTP.

8. 2000-12-04Éric Lesage8 LEAP Protocols IP UDP or equivalent ESRO EMSDEHTD… Bearer

9. 2000-12-04Éric Lesage9 Summary

10. 2000-12-04Éric Lesage10 Conclusions 3G (UMTS, GSM GPRS, etc.) networks are IP based; is the WAP proxy model still justified? WAP: XHTML and maybe TCP in next version… protocol stack slowly starting to erode. LEAP: good idea, but no real taker so far. i-mode: based on HTML; future lies in XML; however, much richer experience (video on 3G; Java games, etc.)