SMSC Technical Presentation Md Zillur Rahman Deputy ManagerOperation

Short Message Service Center l Supplied by Huawei l Developed by Huawei l SMSC

SMSC Features l Mobile Originating Messaging l Mobile Terminating Messaging l Direct Mode l

SMSC Features l Concatenated Short Messages l Scheduled Messages l Message Expiry l Delivery

SMSC Features (Continued) l Black and White Lists l Anti Spamming defines maximum number

SMSC New Features l SMS over GPRS l Distribution Lists l MT spamming detection

Shot Message l A message is one of the following: ¡ MO to SMSC

Message Handling l MT Errors: l. Unknown Subscriber (1) l. Subscriber Mobile Switched off

Retry Algorithm l How long SMS will be stored and How many times SMS

Validity Period Processing • Retry algorithm • Validity period set by subscriber • System

On-Net SMS Delivery MO Dhaka MSC SMS-MO IDP SCP CON HLR SRI MT-ACK SRI-ACK

Off-Net SMS Delivery MO GP GMSC Teletalk MSC SMS-MO IDP SCP CON SRI MT-ACK

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SMSC Technical Presentation Md. Zillur Rahman Deputy Manager(Operation)

Short Message Service Center l Supplied by Huawei l Developed by Huawei l SMSC GT 880150159999 l SMSC Point Code 2208

SMSC Features l Mobile Originating Messaging l Mobile Terminating Messaging l Direct Mode l Store-and-Forward l Datagram Mode l Text Messaging

SMSC Features l Concatenated Short Messages l Scheduled Messages l Message Expiry l Delivery Reports l Background Messaging l Configurable Retry Algorithm

SMSC Features (Continued) l Black and White Lists l Anti Spamming defines maximum number of messages to a single subscriber l Output Regulation prevents overloading of Signaling Link l Input Protection protects throttling of SMSC by burst of MO Traffic l Priority Messages

SMSC New Features l SMS over GPRS l Distribution Lists l MT spamming detection l SMPP 3. 4

SMC in GSM Network

SMSC Architecture

SMSC System Architecture

Shot Message l A message is one of the following: ¡ MO to SMSC ¡ SMSC to MT ¡ SMSC to ESME ¡ ESME to SMSC l Message Size - 160 7 -bit characters - Concatenated SMS using Multiple Messages with UDH containing segmentation information 153 7 -bit characters - Maximum 255 segments (Practically 5 -6 segments)

Message Handling

Message Handling l MT Errors: l. Unknown Subscriber (1) l. Subscriber Mobile Switched off (24) l Tele Service not provisioned (11) l Memory Capacity exceeded (32) l HLR Does not reply after routing message sent (41) l. MSC Does Not reply (48)

Retry Algorithm l How long SMS will be stored and How many times SMS will be retried is decided by the Retry Algorithm l There is a configurable retry algorithm against each MT error.

Validity Period Processing • Retry algorithm • Validity period set by subscriber • System Maximum validity period • System default validity period

On-Net SMS Delivery MO Dhaka MSC SMS-MO IDP SCP CON HLR SRI MT-ACK SRI-ACK SMS-MT SRI Bogra MSC SMS-MO SMS-MT SRI-ACK MT-ACK SMS-MT MT

Off-Net SMS Delivery MO GP GMSC Teletalk MSC SMS-MO IDP SCP CON SRI MT-ACK SRI-ACK SMS-MT SRI-ACK SRI GP MSC SMS-MO SMS-MT SRI-ACK MT-ACK SMS-MT GP HLR MT

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