1. Kwangwoon Univ. http://netcom.kw.ac.kr Wireless and Mobile Network Architectures GSM Short Message Service

2. Kwangwoon Univ. http://netcom.kw.ac.kr 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

3. Kwangwoon Univ. http://netcom.kw.ac.kr Wireless and Mobile Network Architectures 12.1 SMS Architecture Figure 12.1 GSM short message service network architecture

4. Kwangwoon Univ. http://netcom.kw.ac.kr Wireless and Mobile Network Architectures 12.2 SMS Protocol Hierarchy Figure 12.2 SMS MS-MSC protocol hierarchy (mobile origination)

5. Kwangwoon Univ. http://netcom.kw.ac.kr Wireless and Mobile Network Architectures 12.2 SMS Protocol Hierarchy 12.2.1 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

6. Kwangwoon Univ. http://netcom.kw.ac.kr Wireless and Mobile Network Architectures 12.2 SMS Protocol Hierarchy 12.2.2 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

7. Kwangwoon Univ. http://netcom.kw.ac.kr Wireless and Mobile Network Architectures 12.2 SMS Protocol Hierarchy 12.2.3 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

8. Kwangwoon Univ. http://netcom.kw.ac.kr 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

9. Kwangwoon Univ. http://netcom.kw.ac.kr Wireless and Mobile Network Architectures 12.3 Mobile-Originated Messaging Figure 12.4 MM-connection establish for mobile-originated short messaging

10. Kwangwoon Univ. http://netcom.kw.ac.kr Wireless and Mobile Network Architectures 12.3 Mobile-Originated Messaging Figure 12.5 Mobile-originated short messaging (part 2)

11. Kwangwoon Univ. http://netcom.kw.ac.kr Wireless and Mobile Network Architectures 12.3 Mobile-Originated Messaging Figure 12.6 Mobile-originated short messaging (part 3)

12. Kwangwoon Univ. http://netcom.kw.ac.kr 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

13. Kwangwoon Univ. http://netcom.kw.ac.kr Wireless and Mobile Network Architectures 12.4 Mobile-Terminated Messaging Figure 12.8 Mobile-terminated short messaging (part2)

14. Kwangwoon Univ. http://netcom.kw.ac.kr Wireless and Mobile Network Architectures 12.4 Mobile-Terminated Messaging Figure 12.9 Mobile-terminated short messaging (part 3)