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Mobile System SMS - 160 bytes that saved an industry

Mobile System SMS - 160 bytes that saved an industry. Johan Montelius jm@sics.se. Overview. Background History of SMS, functionality, usage … Infrastructure SMSC, SMPP, GSM 03.40 … Message format 160 characters, Smart-messaging, EMS …. In short. two-way

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Mobile System SMS - 160 bytes that saved an industry

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  1. Mobile SystemSMS - 160 bytes that saved an industry Johan Monteliusjm@sics.se

  2. Overview • Background • History of SMS, functionality, usage … • Infrastructure • SMSC, SMPP, GSM 03.40 … • Message format • 160 characters, Smart-messaging, EMS …

  3. In short • two-way • terminals can both send and receive • stor-and-forward • delivered when terminal is activated • short message • 140 bytes or 160 7-bit characters • available • mainly GSM systems but also in other cellular systems

  4. History • Specified in GSM phase 1 standard • First public service in 1994 • Roaming • Slowly introduced in 1999 • Market takes off in 1999 • 1 billion messages/month in Apr 1999 • 3 billion messages/month in Dec 1999

  5. Market growth

  6. Telia in Norway and Sweden 2001 Norway: 13% of turnover Sweden: 4% of turnover Norway: 900M messages/ 1 M subs Sweden: 400M messages/ 3,2 M subs

  7. Usage • Operators report an average of 10-30 user originated messages per month. • Traffic: • voice message notification • P2P messaging • ring tones / logos • sports scores • other information services

  8. Premium SMS Request sent as SMS message Same request short-number (1985) regardless of operator. Sender of request is charged 10 NOK.

  9. Location based services Request sent as SMS message Operator dependant service

  10. Will SMS be replaced?

  11. Infrastructure • MT • SMS capable terminal • SMSC • Short message service centre • Mobile network • Network to deliver the SMS

  12. SMSC – the heart of SMS GSM Network MSC MSC SMSC IWMSC/GMSC MSC MT

  13. SMSC Interface SM-TP Short message transport protocol HLR GSM 09:02 GSM 04:11 MSC GSM 03:40 SMSC Not standardized by ETSI Fixed network

  14. the SMSC • Vendors • CMG, Comverse, Logica, Sema Group … • Servers • Reliable, distributed • 2500 messages/s • Integrated billing support

  15. Everyone wants a standard Sema Logica CMG Nokia OIS SMPP UCP CIMD www.smsforum.net Fixed network TCP/IP X.25

  16. Intermediator

  17. SMS format • Specified in GSM 03:40 and 09:11 • 140 bytes or 160 7-bit characters • Three types of messages: • User: normal text messages • Mobile: OTA configuring • SIM: operator specific applications

  18. Extensions to SMS • Nokia: Smart messaging • OTA provisioning • ring tones, logos • EMS Enhanced Messaging Service • 3GPP • Ericsson, Siemens, Alcatel , Motorola • ringtones, sound, logos, images, animations, text style …

  19. EMS EMS header standard 7-bit characters • Content • Formating information, pre-defined or user supplied content. • Pointers • Where in the text flow?

  20. Do it yourself SMS interface • Modem signaling using standard GSM phone

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