LTE（長(zhǎng)期演進(jìn)）是依靠基于3GPP GSM發(fā)展道路的演進(jìn)，并超越了3G HSDPA/HSUPA，其旨在以低于3G的每數(shù)據(jù)位成本提供更高的數(shù)據(jù)速度。其目標(biāo)是當(dāng)在20MHz頻譜分配中運(yùn)行，并且在下行鏈路中上升到可實(shí)現(xiàn)最高類(lèi)別UE 的300Mbps峰值速率時(shí)，使數(shù)據(jù)速率在下行鏈路上超過(guò)100MMbps，在上行鏈路上超過(guò)50Mbps。

LTE技術(shù)還將確保速度高達(dá)120km/h時(shí)的高性能以及在速度高達(dá)350km/h時(shí)的蜂窩網(wǎng)絡(luò)中實(shí)現(xiàn)移動(dòng)性支持。除更高的數(shù)據(jù)速率外，另一個(gè)目標(biāo)是實(shí)現(xiàn)廣域范圍覆蓋。對(duì)于5km信元至30km信元以及最長(zhǎng)100km信元，必須實(shí)現(xiàn)相應(yīng)的吞吐量、效率及移動(dòng)性目標(biāo)。此外，通過(guò)在具有較小IP 分包的無(wú)載情況下使數(shù)據(jù)平面延遲小于5ms，這一目標(biāo)還將實(shí)現(xiàn)更短的延遲。

About LTE technology
LTE (Long Term Evolution) lies on the 3GPP GSM evolutionary path beyond 3G HSDPA/HSUPA and is designed to provide increased data speeds at a lower cost per
data bit compared to 3G. It targets data rates in excess of 100Mbps over the downlink and 50Mbps over the uplink when operating in the 20MHz spectrum allocation, climbing to peak rates of 300Mbps in the downlink for the highest category UEs.

LTE technology will also ensure high performance for speeds up to 120km/h and mobility support across the cellular network for speeds up to 350km/h. As well as higher data rates, wide-area coverage is also being targeted. The throughput, efficiency and mobility targets must be met for 5km cells through to 30km cells and up to 100km cells. Reduced latency is also being addressed with a target for data-plane latency less than 5ms in unloaded conditions with small IP packets.