SERVICE (SMS) ECE 2525 MOBILE COMMUNICATION Monday, 25 February - - PowerPoint PPT Presentation

GSM SHORT MESSAGE SERVICE (SMS)

ECE 2525– MOBILE COMMUNICATION Monday, 25 February 2020

SAFARICOM 6-MONTH REVENUE SEPTEMBER 2018

VOICE 42% MPESA 31% INTERNET DATA 17% SMS 8% OTHERS 2%

GENERAL OBSERVATIONS

• 1. Voice revenue, although

declining, is still dominant.

• 2. Value added services lead

by Mobile money have eclipsed data from the second position.

• 3. SMS, although facing

strong competition from mobile chat applications such as Whatsup, is still holding a respectable place at 8%.

SMS DEFINITION

1. Short message service (SMS) is a globally accepted wireless service that enables the transmission of alphanumeric messages between mobile subscribers and external systems such as electronic mail, paging, and voice-mail systems. 2. Short Message Service (SMS) is a text messaging service component

• f phone, web, or mobile communication systems. It uses standardized

Communications protocols to allow fixed line or mobile phone devices to exchange short text messages. 3. SMS provides a connectionless transfer of messages at low capacity and low-time performance. 4. SMS Messages must be no longer than 160 alpha-numeric characters and contain no images or graphics. 5. Messages longer than 160 characters are broken into shorter streams of less or equal to 160 characters. 6. The first SMS was sent in 1992 on a Vodafone GSM network in the UK

ADVANTAGES OF SMS

Advantages of SMS are as follows.

• 1. SMS is the oldest most reliable means to communicate with mobile

users

• 2. It enjoys widespread use
• 3. Useful for sending and receive emergency messages
• 4. SMS forms an integral part of other value-added service such as

mobile money applications.

BASIC SMS OPERATION (1)

1. Mobile Station (MS) sends message to a Short Message Service Centre (SMSC). 2. SMSC sends a Request to the home location register (HLR) to find home data of the roaming customer. 3. HLR responds to the SMSC with the subscriber's status, e.g inactive, active and

• r where the subscriber is roaming.

4. If MS status from the HLR is "inactive", then the SMSC will hold onto the message for a period of time. 5. When the “Inactive” MS becomes “Active”, the HLR will sends SMS Notification to the SMSC, and the SMSC will attempt delivery. 6. If “Active”, the SMSC transfers the data the to the serving system. 7. The serving system pages the device, and if it responds, the message gets delivered. 8. The SMSC receives verification that the message was received by the end user, then categorizes the message as "sent" and will not attempt to send again.

MS1 MS2 SMSC1 MSC/HLR1 SMSC2 MSC/VLR2

• 1. Submit SM
• 2. Send routing/status Infor
• 3. Forward Short Message
• 4. Request Infor on MS2
• 6. Page MS2
• 7. Authentication
• 8. MS2 Infor
• 9. Message Transfer/ACK
• 10. Delivery Report
• 11. Status Report

BASIC SMS OPERATION (2)

TYPES OF SMS

There are three types of SMS, i.e

• 1. User-Specific: Displayed to the user.
• 2. ME-Specific: Processed by the Mobile Equipment

instead of showing to the user. Examples include displaying a ringing tone, business card or modifying a default icon.

• 3. SIM-Specific: Processed by the SIM card using special

software installed in the EEPROM of the SIM card.

BENEFITS OF SMS

SMS benefits include the following:

• 1. Prompt Delivery of notifications and

alerts/Fast data transfer

• 2. Guaranteed message delivery/Robust

connectivity

• 3. Reliable, low-cost communication

mechanism information

• 4. Ability to screen messages and return

calls in a selective way/Security support

SMS-SC ACCESS PROTOCOLS

• SMS protocols have evolved since the first commercial text message

was sent in 1992.

• Today the 3rd Generation Partnership Project (3GPP) maintains the

SMS standard.

• The binary access protocols used to access the SMS Service over

TCP/IP or X.25 are;

• SMPP,
• CIMD,
• UCP/EMI