SHORT MESSAGE SERVICE(SMS)

1. Seminar on SHORT MESSAGE SERVICE(SMS) by Sujisha.k

2. INTRODUCTION • SMS appeared on the wireless scene in 1991 in Europe. The European standard for digital wireless, now known as the Global System for Mobile Communications (GSM), included short messaging services from the outset. • In North America, SMS was made available initially on digital wireless networks built by early pioneers such as BellSouth Mobility, PrimeCo, and Nextel, among others. These digital wireless networks are based on GSM, code division multiple access (CDMA), and time division multiple access (TDMA) standards.

3. SMS(Short Message Service) • Short Message Service is a mechanism of short messages over the mobile networks • The message from the sending mobile is stored in a SMC which then forward it to the destination • Short message can be no longer than 160 character • An interesting feature of SMS is return reciepts • SMS used signaling channel as opposed to dedicated channel • SMS support national & international roaming

4. HOW DOES SMS WORK HLR MS SME S SMC GMSC SMC MSC BSS SSME SME VLR

5. TECHNICAL DETAILS GSM • Short Message Service –Point to Point(SMS-PP) was originally defined in GSM • GSM defines the Short Message Service –Cell Broadcast(SMS_CB) GATEWAY PROVIDERS • SMS gateway providers facilitate sms traffic b/w businesses and mobile subscribers. • SMS gateway providers classified as aggregators and SS7providers

6. MESSAGE SIZE • Short messages can be encoded using a variety of alphabets • Depending on which alphabet used leads to maximum short message sizes of 160 7-bit,140 8-bit,70 16-bit characters INTERCONNECTIVITY WITH OTHER N/W • Message service centers communicate with PLMN or PSTN via interwoking & GMSCs • Subscriber originated messages are transported from handset to service center &may be destined for mobile users,subscribers on a fixed n/w

7. SMS SPOOFING • It occur when a fraudester manipulates address information in order to impersonate a user . • Detecting and blocking spoofed message can be implemented using intelligent routing function.

8. TYPES OF SMS FLASH SMS it appears directly on the main screen without user interaction 2. SILENT SMS It will not shown up on the display directly.

9. Network architecture

10. Subscriber Services • SMS comprises two basic point-to-point services: • Mobile-originated short message (MO–SM) • Mobile-terminated short message (MT–SM)

11. DIFFERENCE B/W SMS & E-MAIL SMS • Text message in cellphones • It needs cell phone • 160 characters • Not carry multimedia files E-MAIL • Digital message in neworks • It need internet connection,pc etc. • 1000 characters • It carry multimedia files

12. APPLICATIONS • It is possible to send e-mail messages from a mobile phone to e-mail • Provide information service like news , weather etc. • Mobile chatting • Downloading new ringtones • Alphanumeric paging services

13. LIMITATIONS • Vanilla in nature • Limited by size • Data rate and latency • Store and forward nature of SMS

14. CONCLUSION………. SMS,because of its very nature has unique advantages that other non voice sevices do not have.it is a very convenient way of xchaging small bits of information b/wusers

15. THANK YOU

16. Questions?