1G
The first generation of system for mobile telephony was analogue, circuit switched, and it only carried voice traffic. The analogue phones use in 1G were less secure and prone to interference where the signal is week. Analogue system include AMPS, NMT and ETACS.
2G
The second generation of mobile telephony systems used digital encoding. 2G networks support hight bit rate voice, limited data communications and different levels of en\cryption. 2G network include GSM, D-AMPS (TDMA). 2G network can support SMS applications.
2.5G
2.5G extends 2G systems, adding features such as packet - switched connection and enhanced data rates. 2.5G networks include GPRS. These network support WAP, MMS, SMS mobile games, and search and directory.
2.7G
A 2G mobile phone is a circuit switched digital mobile phone. After those terms were defined, slow packet switched data was added to 2G standards and called 2.5G. 2.7G is the term which has been decided on for system which don't meet the 3G requirements but are marketed as if they do which do, just, meet the requirements but aren't strongly marketed as such ( E.g EDGE system)
3G
The third generation of mobile systems provides high-speed data transmissions of 144 Kbps and higher. 3G will support multimedia applications such as full-motion vedio, video conferencing and internet access. Network system includes UMTS, CDMA, CDMA2000, AND WCDMA..
3.5G
This is a new online technology in Malaysia. It still tries by Maxis and Celcom. By information given 3.5G is called by HSDPA (High Speed Download Packet Access). 3.5G will support 5 times faster than 3G. The data online speed will go up to 1.8 Mbps
Messaging Service
* SMS (Short Messaging Servis)
The Short Messaging Service (SMS) is the ability to send and receive tex messages to and from mobile telephones.
The tex can comprise of words or numbers or an alphanumberic combination. SMS was created as part of the GSM phase 1 standard. The first short message is belived to have been sent in December 1992 from a personal computer (PC) to a mobile Phone on the Vodafone GSM network in the UK.
Each short message is up to 160 characters is length when latin alphabets are used and 70 characters in length non-latin alphabets sucs as arabic and chinese are used.
For a relatively simple messaging service, there a lot of elements that need to be take into account when developing and deploying SMS! However operators who take the time and trouble to invest in SMS will find appreciating revenues. As such, please say "yes to SMS"!
In Malaysia the SMS start popular on 1998 and at the starting for this service on can send SMS between same operator and afterthat all the SMS can be send for other operators.
*EMS ( Enhanced Messaging Service)
EMS also a mobile phone messaging service and only Nokia never provide this service in Nokia mobile phone. EMS is next generation for the SMS.
This service started using last three years in malaysia and it can't become popular like SMS because at the time Nokia is the leader i mobile phone market.
In an EMS a user can create picture (non colour), animation (non colour), momo ring tone and word. The size for an EMS depends on how large the data (picture, animation, mono ring tone and word). it maybe equal to 2 to 3 or 4 SMS.
EMS has their disadvantages so Nokia never provided this function in Nokia phone.
After that Nokia also done two new messaging services and two service become more popular than EMS. that two massaging services provided by Nokia are picture messaging service and ring tone messaging service.
* MMS (Multimedia Messaging Service)
Multimedia Messaging Service (MMS) is a store and forward messaging service that allows mobile subscribers to exchange multimedia massages with other mobile subscribers.
As such it can be seen as an evolution of SMS, with MMS supporting the transmission of additional media types:
* text
* picture
* audio
* video
* combinations of the above
Multimedia messaging service (MMS) is an important emerging service, which allows the sending of multiple media in a signal messege, and the ability to send a message to multiple recipients.
The originator can easily create a Multimedia Message, either using a built-in or accessory camera, or can use images and sounds stored previously in the phone (and possibly downloaded from a web site)
Even if the recipient phone is not switched on, the Multimedia Message will be stored and sent to the recipient as soon as they swith on their phone. In a non roning case, it is expected that the subscriber will allow a multimedia Message to be downloaded automatically to their phone and then would be notified and could see the multimedia massage immediately.
A number of Multimedia Message can be stored in the user's handset and reviewed or forwarded at a later date.
Each Multimedia Message contains a number of pages (think of a powerpoint slide show as an analalogy). On each page, there can be one image and one set of text. An audio file can also be attached. The time that each "page" is displayed can be specified, so the user experience is somewhat like a slide show.
