LTE is a long-term evolution of UMTS technical standards formulated by 3GPP, which was formally established and launched at the 3GPP Toronto Conference on June 5438+February, 2004. LTE system introduces key technologies such as OFDM and MIMO, which significantly improves the spectrum efficiency and data transmission rate.
And support a variety of bandwidth allocation: 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz. , and supports the global mainstream 2G/3G frequency bands and some new frequency bands, so the spectrum allocation is more flexible, and the system capacity and coverage are also significantly improved.
Extended data
Performance of LTE network:
LTE network can provide a download rate of 300 megabits per second and an upload rate of 75 megabits per second ... In the E-UTRA environment, the delay of less than 5ms can be realized by QOS technology. LTE can meet the communication requirements in high-speed mobile and support multicast and broadcast streams. The LTE frequency band has good expansibility, and supports the frequency and time split frequency bands from 1.4MHz to 20MHz.
All-IP infrastructure, also known as the evolution of core packet network, will replace the original GPRS core packet network and provide seamless handover of voice data to old networks such as GSM, UMTS and CDMA2000. Simplified basic network structure can save network operating expenses for operators. For example, E-UTRA can provide four times the network capacity of HSPA.
Baidu Encyclopedia-Long-term Evolution Technology