1. SHORT MESSAGE SERVICE(SMS)
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 GATEWAY PROVIDERS
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 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
Text message in cellphones
It needs cell phone
160 characters
Not carry multimedia files
Digital message in neworks
It need internet connection,pc etc.
1000 characters
It carry multimedia files

12. APPLICATIONS
It is possible to send messages from a mobile phone to
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?