Objective: To analyse and to know Global System For Mobile (GSM)
Analysis/Discussion:
The GSM applications in our daily life are very essential. Take a mobile phone for an example. We used it almost everyday and almost everywhere. The GSM is very suitable for this project. The GSM system on mobile devices has it advantages and its drawback such as:
Advantages:
- Extensive Coverage
- Security
- Affordable devices and services
- Wide spectrum availability
Disadvantages:
- Can cause electronic interference
- Bandwidth lag
- Radiation
- Every device uses a simcard provided by Telco. Service is terminated if simcard is not reloaded/Topup
Below is an example of a GSM network architecture.
The GSM network can be divided into four main parts:
- The Mobile Station (MS).
- The Base Station Subsystem (BSS).
- The Network and Switching Subsystem (NSS).
- The Operation and Support Subsystem (OSS) (BSS and NSS together).
TYPE
|
FULL ACRONYM DESCRIPTION
|
BTS
|
BASE TRANSCEIVER STATION
|
BSC
|
BASE STATION CONTROLLER
|
HLR
|
HOME LOCATION REGISTER
|
VLR
|
VISITOR LOCATION REGISTER
|
AUC
|
AUTHENTICATION CENTER
|
OMC
|
OPERATION AND MAINTENANCE CENTRE
|
MSC
|
MOBILE SWITCHING CENTRE
|
PSTN
|
PUBLIC SWITCHED TELEPHONE NETWORK
|
ISDN
|
INTEGRATED
SERVICES DIGITAL NETWORK
|
In this project, I need to find a suitable GSM device to send and receive a Short Messaging Service (SMS). In my opinion, I think a GSM modem would suffice as the GSM device. Currently, there are many choices of this type of modem in the market. The SIEMENS company offers variety of product which i think suitable with its reasonably priced product. Below are the example of a GSM modem:
A GSM modem is a specialized type of modem which accepts a SIM card, and operates over a subscription to a mobile operator, just like a mobile phone. From the mobile operator perspective, a GSM modem looks just like a mobile phone.When a GSM modem is connected to a computer, this allows the computer to use the GSM modem to communicate over the mobile network. While these GSM modems are most frequently used to provide mobile internet connectivity, many of them can also be used for sending and receiving SMS and MMS messages.
Conclusion:
The GSM modem the most expensive component in this project. I need to save up a sum of money before FYP II course start. Also, I also need to learn how to program the GSM modem and how to integrate it with the circuit.
