Kwangwoon Univ. Wireless and Mobile Network Architectures GSM Short Message Service

Kwangwoon Univ. Wireless and Mobile Network Architectures GSM Short Message Service  Can contain up to 140 octets, or 160 char.  To allow messages longer than 160 char.  SMS concatenation  SMS compression  SDCCH signaling channel  Two type of GSM SMS  Cell broadcast service  Point-to-point service

Kwangwoon Univ. Wireless and Mobile Network Architectures 12.1 SMS Architecture Figure 12.1 GSM short message service network architecture

Kwangwoon Univ. Wireless and Mobile Network Architectures 12.2 SMS Protocol Hierarchy Figure 12.2 SMS MS-MSC protocol hierarchy (mobile origination)

Kwangwoon Univ. Wireless and Mobile Network Architectures 12.2 SMS Protocol Hierarchy Short Message Transfer Layer  Provides services to transfer SM-AL short msg.  Generate a reference number SMI (short message identifier)  SM-AL SMI is not carried between the MS and SM-SC  Four types of transfer protocol data units (TPDUs)  SMS-SUBMIT  SMS-DELIVER  SMS-STATUS-REPORT  SMS-COMMAND

Kwangwoon Univ. Wireless and Mobile Network Architectures 12.2 SMS Protocol Hierarchy Short Message Relay Layer  Provides services to transfer TPDUs and delivery reports for SM-TL  Generate SM-RL SMI for every short message  SM-RL SMI is mapped to and from SM-TL SMI  SM-RL SMI at the MS is not carried at the peer entity in the SM-SC  SM-RP consists of the following RPDU types:  RP-DATA  RP-SM-MEMORY-AVAILABLE  RP-ACK  RP-ERROR

Kwangwoon Univ. Wireless and Mobile Network Architectures 12.2 SMS Protocol Hierarchy Connection Management Sublayer  Provides services to support the SM-RL  MS has two SMC entities  MS-originated (MO) short message service  MS-terminated (MT) short message service  SM-CP consists of following protocol elements  CP-DATA  CP-ACK  CP-ERROR  MNSMS-ESTablish  To establish an MM-connection and transfer RPDU on that establish  MNSMS-DATA  Transfer an RPDU on MM-connection  MNSMS-RELease  MNSMS-ABORT  MNSMS-ERROR

Kwangwoon Univ. Wireless and Mobile Network Architectures 12.3 Mobile-Originated Messaging Figure 12.3 Mobile-originated short messaging (part 1) The logical message path is : MS -> originating MSC -> IWMSC -> SM-SC

Kwangwoon Univ. Wireless and Mobile Network Architectures 12.3 Mobile-Originated Messaging Figure 12.4 MM-connection establish for mobile-originated short messaging

Kwangwoon Univ. Wireless and Mobile Network Architectures 12.3 Mobile-Originated Messaging Figure 12.5 Mobile-originated short messaging (part 2)

Kwangwoon Univ. Wireless and Mobile Network Architectures 12.3 Mobile-Originated Messaging Figure 12.6 Mobile-originated short messaging (part 3)

Kwangwoon Univ. Wireless and Mobile Network Architectures 12.4 Mobile-Terminated Messaging Figure 12.7 Mobile-terminated short messaging (part 1) The logical massage path is : SM-SC -> GMSC -> terminating MSC -> MS

Kwangwoon Univ. Wireless and Mobile Network Architectures 12.4 Mobile-Terminated Messaging Figure 12.8 Mobile-terminated short messaging (part2)

Kwangwoon Univ. Wireless and Mobile Network Architectures 12.4 Mobile-Terminated Messaging Figure 12.9 Mobile-terminated short messaging (part 3)