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A Survey of Application Protocols for Wireless Devices

A Survey of Application Protocols for Wireless Devices. Éric Lesage. Introduction. SMS HDML I-mode WAP LEAP Summary Conclusion. 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.

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A Survey of Application Protocols for Wireless Devices

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

  2. Introduction • SMS • HDML • I-mode • WAP • LEAP • Summary • Conclusion Éric Lesage

  3. 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 Éric Lesage

  4. HDML (Handheld Device Markup Language) <HDML version="3.0" markable="true"> <CHOICE name="main" key="pgtarg"> <ACTION type="accept" task="go" dest="/redirs_hd3.hdml?pgtarg=$(pgtarg)"> <ACTION TYPE="SOFT1" LABEL="ABOUT" task=gosub dest="/hd3/about.hdml"> <ACTION TYPE="help" task=gosub dest="/hd3/help.hdml?help=index"> <LINE>INFOSPACE <ce task="go" dest="/hd3/my.hdml?&r=25569" REL=NEXT>My InfoSpace <CE task="go" dest="#direc">Directories <CE value="invi">Finance <CE value="spti">Sports <CE value="funst">Entertainment <CE value="nwsi">News <CE value="weat">Weather <CE value="ylwdir">Directions </CHOICE> <CHOICE name="direc" key="pgtarg"> <ACTION type="accept" task="go" dest="/redirs_hd3.hdml?pgtarg=$(pgtarg)"> <ACTION label="DONE" type="soft1" task="go" dest="#main"> <WRAP>DIRECTORIES <CE value="ppli">White Pages <CE value="ylwi">Yellow Pages <CE value="pplrl">Reverse Lookup <CE task="go" dest="http://yp.infospace.com/hd3/yel/finders.hdml?yp_f=N&r=25569"> Finders </CHOICE> </HDML> Éric Lesage

  5. I-mode <html><head> <META http-equiv="Content-Type" content="text/html; charset=x-sjis"> <META name="CHTML" content="yes"> <META name="description" content="欧州､国際ﾋﾞｼﾞﾈｯｽ"> <title>(ｶ)ﾕｰﾛﾃｸﾉﾛｼﾞｰ</title></head> <body bgcolor="#ffffff" text="#000000"> <center> ﾕｰﾛﾃｸﾉﾛｼﾞｰ<br> eurotechnology<br> </center> <hr> ●メニュー：<br> <A HREF="http://eu-japan.com/i/index.html" accesskey="1">&#63879</A>欧州のページ<BR> <A HREF="eurotechnologyj.html" accesskey="2">&#63880</A>会社案内<BR> <A HREF="eurotechnologye.html" accesskey="3">&#63881</A>English<BR> <hr> <center> <A href=mailto:@docomo.ne.jp? body=http://www.eurotechnology.com/i/index.html>友達に紹介</a><br> &copy;2000ﾕｰﾛﾃｸﾉﾛｼﾞｰ<BR> </center></body></html> Éric Lesage

  6. 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 Éric Lesage

  7. 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. Éric Lesage

  8. LEAP Protocols EMSD EHTD … ESRO UDP or equivalent IP Bearer Éric Lesage

  9. Summary Éric Lesage

  10. 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.) Éric Lesage

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