Long Term Evolution (LTE) is a long-term evolution of UMTS (universal mobile telecommunications system) technical standard formulated by 3gpp (3rd generation partnership project), which was formally established and launched at the 3GPP Toronto Conference in June 2004.
Extended data:
The LTE standard puts forward strict technical requirements for the system, mainly in terms of capacity, coverage and mobility support, which are summarized as follows:
1, peak rate -20 MHz bandwidth, downlink peak rate 100Mbit/s, uplink peak rate 50mbit/s;
2. Spectrum efficiency-downlink is 3-4 times that of HSDPA and uplink is 2-3 times that of HSUPA;
3. Coverage enhancement-improve the cell edge code rate, meet the optimal capacity within 5km, slightly decrease within 30km, and support the coverage radius of100 km;
4. Mobility improvement-the performance is the best in the range of 0 ~15 km/h, and the performance is higher in the range of 15 ~ 120 km/h, supporting 120-350km/h, and even supporting 500 km/h in some frequency bands;
5. Delay optimization-the one-way transmission delay of user plane data is less than 5ms, and the state transition delay from idle to active control plane is less than100 ms. ..
6. Diversified service content-high-performance broadcast service, improved real-time service support ability, VoIP reaching the performance of UTRAN circuit domain;
7. Reduce operation and maintenance costs-The flat and simplified network architecture reduces the operation and maintenance costs of the operator's network.
Baidu encyclopedia -LTE
Baidu encyclopedia -TD-LTE