Mobile Computing
Short Message Service Pertemuan 3 Adam Arif B
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What is SMS? • SMS stands for short message service. •
SMS is also often referred to as texting, sending text messages or text messaging. The service allows for short text messages to be sent from one cell phone to another cell phone or from the Web to another cell phone. Including spaces, text messages traditionally can’t exceed 160 characters Free Powerpoint Templates
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Sejarah SMS • Appeared on the wireless world in 1991 in Europe. • In North America, SMS was made available initially on digital wireless networks built by early pioneers such as BellSouth Mobility, PrimeCo and Nextel, among others. • There was hardly any promotion as few people predicted that this service would take off. Free Powerpoint Templates
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Sejarah SMS • Fortunately, SMS was a success and it took everyone in the mobile industry by surprise. • First short message – sent in December 1992 from a personal computer to a mobile phone on the Vodafone GSM (Global System for Mobile Communications) Network in the UK. • In April 1999, SMS market in the European Union reached one billion short messages per month. Free Powerpoint Templates
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Sejarah SMS • It had become one of the few services in consumer history that has grown very fast without corresponding decrease in pricing. • However, after SMS charging came about – a decline in usage of about 25% to 40% • In Indonesia 2001 Free Powerpoint Templates
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Panjang SMS • A single short message can be up to 160 characters of text in length using default GSM alphabet coding • 140 characters when Cyrillic character set is used • 70 characters when UCS2 international character coding is used Free Powerpoint Templates
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Penggunaan SMS pada konsumen • • • • • •
Person to person message Information service Voice message Android fax notification Internet email alerts Download service Smart messaging Free Powerpoint Templates
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Penggunaan SMS pada konsumen corporate • •
Vehicle positioning Remote monitoring
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Penggunaan SMS pada operator • • • • •
Operator = penyelenggara layanan mobile telecommunication SIM Lock SIM Updates Message waiting indicator Setting service (GPRS) dll Free Powerpoint Templates
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UCS-2 UCS-2 (2-byte Universal Character Set) • The UCS-2 encoding form is identical to that of UTF16(16-bit UCS/Unicode Transformation Format), except that it does not support surrogate pairs and therefore can only encode characters in the BMP range U+0000 through U+FFFF. • A pair of 16-bit words, together called a surrogate pair • As a consequence it is a fixed-length encoding that always encodes characters into a single 16-bit value. Free Powerpoint Templates
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GSM alphabet coding
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Cyrillic Character set
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Channel Assignment • SDCCH (Stand Alone Control Channel) when not on a call • SACCH (Slow associated control channel) When we are on a call
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Entitas pada SMS •
•
•
Short Message Entity: elemen yang mengirim atau menerima SMS, terletak di perangkat HP, Fax atau lainnya, berupa software atau lainnya Service center/SMSCenter: menghubungkan short message dan penyimpanan message Email gayeway: email to sms interoperability, interkoneksi SMSC dengan internet Free Powerpoint Templates
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layanan dasar SMS - Mobile terminated (from a SMS–C to a mobile station (MS)) SMS - Mobile originated (from a mobile station to a SMS–C) SMS
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Mobile terminated (SMS MT) • pengiriman SMS dari SMSC ke MS. Untuk pegiriman SMS ini akan disediakan informasi pengiriman, baik delivery report untuk SMS yang berhasil maupun failure report untuk pengiriman yang gagal karena sebeb tertentu, sehingga memungkinkan SMSC untuk melakukan pengiriman ulang Free Powerpoint Templates
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Diagram Alir SMS Mobile Terminating • • • • •
A (misal: aplikasi) mengirim pesan ke SMSC SMSC mengirimkan pesan ke SMS–GMSC SMS–GMSC menginterogasi HLR untuk informasi routing HLR membalas informasi routing ke SMSGMSC SMS-GMSC meneruskan pesan ke MSC/VLR Free Powerpoint Templates
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Diagram Alir SMS Mobile Terminating • 6. MS di-paging dan koneksi terbentuk antara MS dan network, sebagaimana dalam setup pangilan normal. (Dengan demikian posisi MS diketahui dan apakah MS boleh berada dalam network / proses otentikasi). • 7. Jika otentikasi berhasil, MSC/VLR mengirim pesan sms tersebut ke MS. SMS dikirim melalui kanal signaling SDCCH) • 8. Jika pengiriman berhasil, delivery report dikirim dari MSC/VLR ke SMSC. Namun jika tidak, MSC/VLR akan menginformasikan ke HLR, dan failure report dikirim ke SMS–C. Free Powerpoint Templates
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Mobile originated (SMS MO) •
•
MS membuat koneksi ke jaringan, sebagaimana dalam setup panggilan normal Jika otentikasi berhasil, MS akan mengirim SMS ke SMSC melalui MSC/VLR. Selanjutnya SMSC akan meneruskan SMS ke tujuan Free Powerpoint Templates
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SMS gateway • SMS gateway adalah sebuah perangkat yang menawarkan layanan transit SMS, mentransformasikan pesan ke jaringan selular dari media lain, atau sebaliknya, sehingga memungkinkan pengiriman atau penerimaan pesan SMS dengan atau tanpa menggunakan ponsel. Free Powerpoint Templates
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How SMS works • Once message is sent, it is received by a Short Message Service Center (SMSC), which then gets it to the appropriate mobile device. • SMSC sends a SMS Request to the home location register (HLR) to find the roaming customer. Free Powerpoint Templates
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Contd.. • On reception, HLR responds to the SMSC with the subscriber’s status I.e. active or inactive. • Inactive – SMSC holds message for a period of time. • Active – HLR sends a SMS notification to the SMSC attempts delivery. Free Powerpoint Templates
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Contd.. • SMSC transfers message in a Short Message Delivery Point to Point format to the serving system – if system responds, message gets delivered. • SMSC receives verification that message was received by the end user.
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MO SMS Transfer
MS 1 CHANNEL REQUEST DCCH ASSIGN
BSS
MSC
VLRInterworking MSC
SC
SIGNALING LINK ESTABLISHED
MO: Mobile Originated (from handset)
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MO SMS Transfer
MS 1 CHANNEL REQUEST DCCH ASSIGN
BSS
MSC
VLRInterworking MSC
SC
SIGNALING LINK ESTABLISHED 2 REQ. FOR SERVICE
<SDCCH>
CR CC
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MO SMS Transfer
MS 1 CHANNEL REQUEST DCCH ASSIGN
BSS
MSC
VLRInterworking MSC
SC
SIGNALING LINK ESTABLISHED 2 REQ. FOR SERVICE
<SDCCH>
CR CC
3 AUTHENTICATION SET Cipher MODE
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MO SMS Transfer MS 1 CHANNEL REQUEST DCCH ASSIGN
BSS
MSC
VLRInterworking MSC
SC
SIGNALING LINK ESTABLISHED <SDCCH>
CR
2 REQ. FOR SERVICE CC
3 AUTHENTICATION SET Cipher MODE 4 RP_MO_DATA SIF_MO_SMS SIF_MO_SMS-Ack
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MO SMS Transfer MS 5 MO_Forward_SM
BSS
MSC
VLRInterworking MSC
SC
(SC_No.)
Short_Message Short_Message_Ack MO_Forward_SM_Ack
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MO SMS Transfer
MS
BSS
MSC
VLRInterworking MSC
SC
(SC_No.)
5 MO_Forward_SM Short_Message Short_Message_Ack MO_Forward_SM_Ack
6 RP_ACK "Send Successfully" is displayed on the mobile
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MT SMS Transfer
For Forwarding a Short Message
For Forwarding Several Short Message
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MT SMS Transfer (A Message)
MS
Servicing MSC
VLR
HLR
Gateway MSC
SC
1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM
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MT SMS Transfer (A Message)
MS
Servicing MSC
VLR
HLR
Gateway MSC
SC
1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM 2 SIF_MT_SMS Page Page
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MT SMS Transfer (A Message)
MS
Servicing MSC
VLR
HLR
Gateway MSC
SC
1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM 2 SIF_MT_SMS Page Page 3 Paging Response Authentication and Ciphering
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MT SMS Transfer (A Message)
MS
Servicing MSC
VLR
HLR
Gateway MSC
SC
1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM 2 SIF_MT_SMS Page Page Request 3 Paging Response Authentication and Ciphering 4 Short_Message Short_Message_Ack MT_Forward_SM_Ack Short_Message_Ack
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MT SMS Transfer (Several Messages)
MS
Servicing MSC
VLR
HLR
Gateway MSC
SC
1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM MT_Forward_SM (The More message To Send Flag is True)
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MT SMS Transfer (Several Messages)
MS
Servicing MSC
VLR
HLR
Gateway MSC
SC
1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM MT_Forward_SM (The More message To Send Flag is True) 2 SIF_MT_SMS Page Paging Request
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MT SMS Transfer (Several Messages) MS
Servicing MSC
VLR
HLR
Gateway MSC
SC
1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM MT_Forward_SM (The More message To Send Flag is True) 2 SIF_MT_SMS Page Paging Request
3 Paging Response Authentication and Ciphering
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MT SMS Transfer (Several Messages) MS
Servicing MSC
VLR
HLR
Gateway MSC
SC
4 Short_Message Short_Message_Ack MT_Forward_SM_Ack Short_Message_Ack
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MT SMS Transfer (Several Messages) MS
Servicing MSC
VLR
HLR
Gateway MSC
SC
4 Short_Message Short_Message_Ack MT_Forward_SM_Ack Short_Message_Ack 5 Short_Message MT_Forward_SM MT_Forward_SM (The More message To Send Flag is False) Short_Message Short_Message_Ack MT_Forward_SM_Ack Short_Message_Ack
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MS
BSS
MSC
VLRInterworking MSC
SC
(SC_No.)
MO_Forward_SM Short_Message Short_Message_Ack Illegal Subscriber
MO_Forward_SM_Ack Illegal Subscriber
RP_ACK "Send Not Successfully" is displayed on the mobile
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Aplikasi Potensial teknologi SMS 1. Notification serviceà voice / fax nitification, sms banking dll 2. Email interworking 3. Paging interworking 4. Information service
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Aspek bisnis SMS Data tahun 2011 •180 miliar menit percakapan •260 miliar sms •27000 terabyte layanan data
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Pengguna sms di amerika
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Advantages • An ideal messaging system – for short messages or when it would take too long to have a full conversation or even for someone traveling overseas and not able to take a voice call. • Direct notification of new messages – no dial up for periodical checks to mailbox. Free Powerpoint Templates
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Advantages Contd.. • Messages can be still be received during a call. • Eliminates need for separate devices for messaging since services can be integrated into a single wireless device. • Internet mail alerts • Information services – in some areas, wide range of information including share prices, weather flight information, news headlines etc. Free Powerpoint Templates
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Disadvantage • Restricted to 160 characters. • why
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SMS summary • SMS is much more than just some text. • Sophisticated features are bound to open up holes (virus). • SMS very suited to bulk application (like e-mail) • Trustworthiness as bad or worse as with standard e-mail. Free Powerpoint Templates
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Tugas kelompok Maksimal 5 orang Buatlah makalah dengan topik di bawah ini: - Kelompok 1 à Near field communication - Kelompok 2 à How MMS work - Kelompok 3 à Rich communication - Kelompok 4 à Connected living - Kelompok 5 à Mobile cloud computing - Tugas diketik di kertas HVS A4 - Durasi tugas 1 minggu Free Powerpoint Templates
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Materi dapat didownload di http://mynameadam.wordpress.com Free Powerpoint Templates
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