Transcript Slide 1
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 Link prevents overloading of Signaling 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 GSM Network
SIU
Huawei USAU ESME ESME SMPP, EMI, SEMA over TCP/IP or X.25
SMSC
Billing System OAM System ESME Prepaid System
SMSC System Architecture
Shot Message A message is one of the following: 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
MO SMSC MO Submit MO Response (Ack / Error) MT Deliver MT Response (Ack / Error) MT
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 • Validity period set by subscriber • System default validity period
HLR Site MO
On-Net SMS Delivery
SMS-MO
Dhaka MSC
IDP
8 U
CON
8 U
SRI SRI-ACK
MT-ACK
SRI
MT-ACK SMS-MT SMS-MO SMS-MT
SRI-ACK
SCP Bogra MSC SMS-MT MT-ACK MT
MO
Off-Net SMS Delivery
GP GMSC
SMS-MO
Teletalk MSC
IDP
8 U SCP
SRI SRI-ACK SRI
SRI-ACK MT-ACK
SRI CON
8 U MT-ACK SMS-MT SMS-MO SMS-MT
SRI-ACK
GP MSC SMS-MT MT-ACK MT Site GP HLR
Thank You