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Mobile Computing

Short Message Service

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Short Message ServicePertemuan 3Adam Arif B

What is SMS?

• SMS stands for short message service.

• SMS is also often referred to as texting, sending text messages or text messaging.


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

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


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.

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


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.

Sejarah SMS

• It had become one of the few services in consumer history that has grown very fast without corresponding decrease in pricing.


pricing.• However, after SMS charging came

about – a decline in usage of about 25% to 40%

• In Indonesia 2001

Panjang SMS

• A single short message can be up to 160 characters of text in length using default GSM alphabet coding


default GSM alphabet coding• 140 characters when Cyrillic character

set is used• 70 characters when UCS2 international

character coding is used

Penggunaan SMS pada konsumen

• Person to person message• Information service• Voice message Android fax


• Voice message Android fax notification

• Internet email alerts• Download service• Smart messaging

Penggunaan SMS pada konsumen corporate

• Vehicle positioning• Remote monitoring


Penggunaan SMS pada operator

• Operator = penyelenggara layanan mobile telecommunication

• SIM Lock


• SIM Lock• SIM Updates• Message waiting indicator• Setting service (GPRS) dll

UCS-2

UCS-2 (2-byte Universal Character Set)

• The UCS-2 encoding form is identical to that of UTF-16(16-bit UCS/Unicode Transformation Format), except


16(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.

GSM alphabet coding


Cyrillic Character set


Channel Assignment

• SDCCH (Stand Alone Control Channel) when not on a call

• SACCH (Slow associated control channel)


• SACCH (Slow associated control channel) When we are on a call

Entitas pada SMS

• Short Message Entity: elemen yang mengirim atau menerima SMS, terletak di perangkat HP, Fax atau lainnya, berupa software atau lainnya


software atau lainnya• Service center/SMSCenter:

menghubungkan short message dan penyimpanan message

• Email gayeway: email to sms interoperability, interkoneksi SMSC dengan internet

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

Mobile terminated (SMS MT)

• pengiriman SMS dari SMSC ke MS. Untuk pegiriman SMS ini akan disediakan informasi pengiriman, baik


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

Diagram Alir SMS Mobile Terminating

• A (misal: aplikasi) mengirim pesan ke SMSC

• SMSC mengirimkan pesan ke SMS–GMSC• SMS–GMSC menginterogasi HLR untuk


• SMS–GMSC menginterogasi HLR untuk informasi routing

• HLR membalas informasi routing ke SMS-GMSC

• SMS-GMSC meneruskan pesan ke MSC/VLR

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.

Mobile originated (SMS MO)

• MS membuat koneksi ke jaringan, sebagaimana dalam setup panggilan normal


normal• Jika otentikasi berhasil, MS akan

mengirim SMS ke SMSC melalui MSC/VLR. Selanjutnya SMSC akan meneruskan SMS ke tujuan

SMS gateway

• SMS gateway adalah sebuah perangkat yang menawarkan layanan transit SMS, mentransformasikan pesan ke jaringan


mentransformasikan pesan ke jaringan selular dari media lain, atau sebaliknya, sehingga memungkinkan pengiriman atau penerimaan pesan SMS dengan atau tanpa menggunakan ponsel.

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


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.

Contd..

• On reception, HLR responds to the SMSC with the subscriber’s status I.e. active or inactive.


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.

Contd..

• SMSC transfers message in a Short Message Delivery Point to Point format to the serving system – if system responds,


the serving system – if system responds, message gets delivered.

• SMSC receives verification that message was received by the end user.

MS BSS MSC VLRInterworkingMSC

1 CHANNEL REQUEST <RACH>

<AGCH>DCCH ASSIGN

SIGNALING LINK

ESTABLISHED

SC

MO SMS Transfer


ESTABLISHED

MO: Mobile Originated(from handset)



<AGCH>DCCH ASSIGN

SIGNALING LINK

ESTABLISHED

SC

MO SMS Transfer


<SDCCH>

ESTABLISHED

2 REQ. FOR SERVICE CR

CC



<AGCH>DCCH ASSIGN

SIGNALING LINK

ESTABLISHED

SC

MO SMS Transfer


<SDCCH>

ESTABLISHED

2 REQ. FOR SERVICE CR

CC

3 AUTHENTICATION

SET Cipher MODE



<AGCH>DCCH ASSIGN

<SDCCH>

SIGNALING LINK

ESTABLISHED

CR

SC

MO SMS Transfer


<SDCCH>

2 REQ. FOR SERVICECR

CC

3 AUTHENTICATION

SET Cipher MODE

4 RP_MO_DATA

SIF_MO_SMS

SIF_MO_SMS-Ack

5 MO_Forward_SM

Short_Message

MO_Forward_SM_Ack

Short_Message_Ack

(SC_No.)

MO SMS Transfer


SC


5 MO_Forward_SM

Short_Message

Short_Message_Ack

(SC_No.)

MO SMS Transfer


SC


MO_Forward_SM_Ack

6 RP_ACK

"Send Successfully" is displayed on the mobile

MT SMS Transfer

For Forwarding a Short Message


For Forwarding Several Short Message

MS ServicingMSC VLR HLR Gateway

MSC SC

1 Short Message

SRI_For_SM

SRI_For_SM_Ack

MT_Forward_SM

MT SMS Transfer (A Message)



MSC SC

1 Short Message

SRI_For_SM

SRI_For_SM_Ack

MT_Forward_SM



2 SIF_MT_SMS

PagePage


MSC SC

1 Short Message

SRI_For_SM

SRI_For_SM_Ack

MT_Forward_SM



2 SIF_MT_SMS

PagePage

3 Paging Response

Authentication and Ciphering


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


4 Short_Message

Short_Message_Ack

MT_Forward_SM_Ack

Short_Message_Ack


MSC SC

1 Short Message

SRI_For_SM

SRI_For_SM_Ack

MT_Forward_SM

MT SMS Transfer (Several Messages)


MT_Forward_SM(The More message ToSend Flag is True)


MSC SC

1 Short Message

SRI_For_SM

SRI_For_SM_Ack

MT_Forward_SM




2 SIF_MT_SMSPage

Paging Request


MSC SC

1 Short Message

SRI_For_SM

SRI_For_SM_Ack

MT_Forward_SM


MT_Forward_SM



2 SIF_MT_SMSPage

Paging Request

3 Paging Response



MSC SC

4 Short_Message

Short_Message_Ack

MT_Forward_SM_Ack

Short_Message_Ack




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 ToSend Flag is False)

Short_Message_Ack

MT_Forward_SM_Ack

Short_Message_Ack

Short_Message

MO_Forward_SM

Short_Message

Short_Message_Ack

(SC_No.)


SC

Illegal Subscriber


MO_Forward_SM_Ack

RP_ACK

"Send Not Successfully" is displayed on the mobile

Illegal Subscriber

Illegal Subscriber

Aplikasi Potensial teknologi SMS

1. Notification serviceà voice / fax nitification, sms banking dll

2. Email interworking


3. Paging interworking

4. Information service

Aspek bisnis SMS

Data tahun 2011

•180 miliar menit percakapan

•260 miliar sms


•27000 terabyte layanan data

Pengguna sms di amerika


Advantages

• An ideal messaging system – for short messages or when it would take too long to have a full conversation or even for


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.

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.


single wireless device.• Internet mail alerts • Information services – in some areas, wide range of information including share prices, weather flight information, news headlines etc.

Disadvantage

• Restricted to 160 characters.

• why


• why

SMS summary

• SMS is much more than just some text.• Sophisticated features are bound to open up holes (virus).


holes (virus).• SMS very suited to bulk application (like e-mail)

• Trustworthiness as bad or worse as with standard e-mail.

Maksimal 5 orang

Buatlah makalah dengan topik di bawah ini:- Kelompok 1 à Near field communication

- Kelompok 2 à How MMS work

Tugas kelompok


- 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


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mobile computing short message service - never stop · pdf fileaplikasi potensial teknologi...

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