What does CDMA, GPRS, GSM on your phone mean? March 05, 2002 14:29 A Code-Division Multiple-Access (CDMA); GROUPE Speciale Mobile (GSM). The Chinese of General Packet Radio Service (GPRS (General Packet Radio Service) is a general grouping wireless service. A new packet data bearer service developed on the existing GSM system. The most fundamental difference between GPRS and GSM system is that GSM is a circuit switched system, while GPRS is a packet switched system. GPRS is especially suitable for intermittent, burst or frequent, small amounts of data transmission, and is also applicable to occasional large data volume transmission. We can understand GPRS as a higher level of GSM. There is a wireless application protocol in WAP (WAP (WAP (WAP (WAP (WAP (WiReless Application Protocol), which is a different category with GPRS, which is to introduce the extensive information of the Internet and advanced services into wireless terminals such as mobile phones. The metaphor, GPRS and GSM are both a road, and WAP is a car on the road. After China Mobile Opens GPRS, WAP is driving on both of GSM and GPRS, while driving on the road of GPRS can increase data transmission speed. Therefore, the content on the existing WAP can be browsed and applied via GPRS. CDMA is a mobile communication technology in parallel with GSM, is an English abbreviation of code division multiple access digital wireless technology. It has the advantages of high frequency utilization and low mobile phone power consumption. As with GSM, CDMA also has 2 generations, 2.5 generations and 3 generation technology. China Unicom will receive 2.5 generation technology in the second half of this year.
