SMSC Technical Presentation

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Presentation transcript:

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

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

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

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

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

SMSC New Features SMS over GPRS Distribution Lists MT spamming detection SMPP 3.4

SMC in GSM Network

SMSC Architecture

SMSC System Architecture

Shot Message A message is one of the following: Message Size MO to SMSC SMSC to MT SMSC to ESME ESME to SMSC 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 MT Errors: Unknown Subscriber (1) Subscriber Mobile Switched off (24) Tele Service not provisioned (11) Memory Capacity exceeded (32) HLR Does not reply after routing message sent (41) MSC Does Not reply (48)

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

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

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

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

Thank You