|LTE Modem from Samsung|
Bombarded by so many "launching of 4G technology" news today, I decided to research more on the subject. Here are a few things that I learned:
- Obviously, 4G is the successor of the 3G and 2G family of standards.
- ITU (International Telecommunication Union) established International Mobile Telecommunications Advanced (IMT-Advanced) Standard which defines the peak speed requirements for 4G standards, as follows:
- 100 Mbit per second for high mobility communication (e.g., trains, cars)
- 1 Gbit per second for low mobility communiaction (e.g., walking, stationary)
- Technically, only two standards under development have been accorded the official designation of "IMT-Advanced": LTE Advanced and WirelessMan Advanced.
- As the most advanced technology for wireless communication, IMT-Advanced is considered as "4G", however, current versions of LTE, WiMax, and other evolved 3G Technologies could be considered as "4G" provided that they represent forerunners to IMT-Advanced and "a substantial level of improvement in performance and capabilities with respect to the initial third generation systems now deployed".
- Current 3G Transitional Standards are:
- 3GPP Family: HSPA, HSPA+, LTE (E-ULTRA)
- IEEE Family: Mobile WiMAX, Flash-OFDM, IEEE 802.20
- 3GPP2 Family: EV-DO Rev. A, EV-DO Rev. B