Mobile Connection Technology

1G-1st Generation Mobile Communication Technology

1g (First Generation) indicates the first generation of mobile communication technology. For example, the simulated mobile network is eliminated.

FDMA (1 Gbit/s-1st generation mobile communication technology)Up to 9.6 kbit/s Differences between TDMA CDMA

 

2G (second generation)Indicates the second generation of mobile communication technology. It indicates GSM. It focuses on Digital Speech Transmission Technology.

GSM full name: Global System for Mobile Communications. Chinese: global mobile communication system, commonly known as "global communication ",

The short name of General Packet Radio Service is a mobile data service available to GSM mobile phone users.

GPRSThe transmission rate can be increased56 or even 114 kbps. GPRS is often described as "2G", that is to say, this technology is located between the second generation (2g) and the third generation (3G) mobile communication technology.

EdgeIs short for Enhanced Data Rate for GSM Evolution, that is, enhanced data rate GSM Evolution technology.

Edge is a transitional technology between the existing second-generation mobile network and the third-generation mobile network, which is better than the "second-generation half" technology GPRS, therefore, it is also called the "2.75 generation" technology. In terms of access service performance, edge significantly improves bandwidth. The peak point access rate is 2 Mbit/s, and the single-time channel speed can reach 48 kbit/s.The transmission rate of mobile data services can reach 384 kbit/s at the peak.

 

3G (third generation)The third generation mobile communication technology. High-speed and broadband data transmission. ITU called it an international mobile telecom-munication ). The maximum data transmission rate is 2 BNS/s. Mainstream technologies for CDMA technology representatives are WCDMA (Europe, Japan/China Unicom), CDMA 2000 (US/China Telecom) and TD-SCDMA (China Mobile ).

CDMA 2000 evdo (Korea Telecom standard) rel-0 downstream 2.4 m upstream 156 K (bit/s) REL-a downstream 3.1 m upstream 1.8 m (bit/s)

In the current mature version, China Telecom uses the technology rel-B downstream 3.1 m * 3 = 9.3 m upstream 1.8 m * 3 = 5.4 m (bit/s)

Wcdma hspa (European telecom standard) downstream 14.4 m upstream 5.75 m

The current mature version, China Unicom uses this technology HSPA + downstream 28 m upstream 5.8 m

TD-SCDMA 384 K downstream K upstream

TD-HSDPA 2.8m downlink (one carrier frequency 5 time bound, one time slot 560 K) K uplink

Current mature version, mobile technology TD-HSUPA 2.8m downlink 1.6m uplink

 

4GIt is short for the fourth generation of mobile communication and its technology. It is a technology product that integrates 3G and WLAN and can transmit high-quality video images and ensure that the image transmission quality is comparable to that of high definition TVs. The 4G system can download data at a speed of 2000 Mbps, Which is times faster than the dial-up Internet access. The upload speed can also reach 20 Mbps and can meet the wireless service requirements of almost all users. 4G and fixed broadband networks are comparable in terms of prices that users are most concerned about, and the billing method is more flexible and flexible. Users can determine the services they need based on their own needs. In addition, 4G can be deployed in areas not covered by DSL and cable TV modem, and then extended to the entire region. Obviously, 4G has incomparable advantages.

Long-Term Evolution (LTE)'s most powerful 4G mobile communication technology

WiMAX