|
|
Important to know Technology
Technology for day today is become a part of our life. With knowing technology well can make our life is more better... for example if we understand about using Mobile Phone and all of it features... of course will make our action to that be an optimum act. If we know about micro-controller programing we can create a micro-controller application, like home automation, mobile tracking, etc, other samples... if we know about how the cellular work.. we will see the process of connection can happen...etc..
| Please enjoy visiting my site, register for FREE here you will get some updates. |  |
3G Modem Connections
If we talk about 3G Modem Connections, we should know about basic principles of 3G, Modem and the connection.
Here I will describe each parts and hope you can take a basic knowledge, how to use the 3G Modem and get the benefits of using it.
3G
3G is the third generation of tele standards and technology for mobile networking, superseding 2.5G. It is based on the International Telecommunication Union (ITU) family of standards under the IMT-2000.
3G networks enable network operators to offer users a wider range of more advanced services while achieving greater network capacity through improved spectral efficiency. Services include wide-area wireless voice telephony, video calls, and broadband wireless data, all in a mobile environm...
3G Specifications
There are four international standardisation bodies acting as “generators” for 3G specification work:
ITU-T (International Telecommunication Union)
This organisation provides in practise all the telecommunication branch specifications that are official in nature. Hence, these form all the guidelines required by the manufacturers and country-specific authorities. ITU-T has finished its development process for IMT2000, International Mobile Telephone – 2000. IMT- 2000 represents a framework on how the network evolution from a second to a third generation mobile communication system sh...
Cellular Telecommunication Abbreviations
Abbreviations :
2G 2nd Generation
3G 3rd Generation
AAL ATM Adaptation Layer
AAL2 ATM Adaptation Layer type 2
AAL5 ATM Adaptation Layer type 5
ACK Acknowledgement
AI Acquisition Indicator
AICH Acquisition Indicator Channel
ALCAP Access Link Control Application Protocol
AM Acknowledged Mode
AMR Adaptive Multi Rate
AN Access Network
APDU Application Protocol Data Unit
API Application Programming Interface
ARP Address Resolution Protocol
ARQ Automatic Repeat Request
AS Access Stratum
ASC Access Service Class
ASN.1 Abstract Syntax Notation One
ATM Asynchronous Transfer Mode
AuC Authentication Centre
GPRS Network Architecture
Data as a packet switched and voice as a circuit switched is using the same resource of several equipments in the GSM Network. From Mobile Station (MS) or Mobile Equipment (ME) to Base Transceiver Station is using one network. Detail picture which describe this statement is shown bellow
Why GPRS is needed?
1. GPRS make possible...
BTS Configuration Diagram
1. Main Processor Unit
2. Clock Source
3. Interface Unit
4. Base band Unit
5. Power Supply Unit
6. RF Unit
7. Antenna
Main Processor Unit
The functions of this unit are as a brain for the BTS:
· BTS initialization and self-testing
· configuration
· O&M signaling
· software download
· collection and management of external and internal alarms
Clock Source Unit
The basic function of this unit is like a heart for the BTS:
· Deliver a stable clocking pulse to all digital equipment inside
BTS.
Interface Unit<...
The Generations before GSM
Before GSM technology announced, there are several wireless communications in the world. The first implementations of radio waves for communication were realized in the late nineteenth century for radiotelegraphy. Since then, it has been a widely used technique for military communications.
After Second World War, the real two-way public mobile radio communication systems took place with electronic techniques such as the vacuum valve enabled the implementation of real-scale telephony service for car. The first true mobile telephone service was officially born in
Between 1950 and 1980, mobile radio system evolved to become automatic and the costs decre...
Basic GSM Configuration
It consists of the basic system blocks of the GSM network namely the MSC (Mobile Switching Center), TRAU (TRANSCODER), BSC (Base System Controller, BTS ( Base Transceiver Station) and MS (Mobile Station).
In Figure above, the mobile station talks with the BTS through the use of full duplex radio transmissions using a separate transmit and receive frequency to communicate with each other.
The BTS transmits on the frequency the mobile is tuned to and the mobile transmits to the frequency the BTS receiver is tuned to. The BT...
