LTE is the fourth-generation technology with a great improvement on spectrum efficiency, higher user data rate, low latency, cost reduction, system capacity and coverage.
Long Term Evolution (LTE) is a 4G wireless broadband technology developed by the Third Generation Partnership Project (3GPP), an industry trade group. 3GPP named the technology "Long Term Evolution" because it represents the next step (4G) in a progression from GSM, a 2G standard, to UMTS, the 3G technologies based upon GSM. LTE provides significantly increased peak data rates, with the potential for 100Mbps downstream and 50Mbps upstream, reduced latency, scalable bandwidth capacity, and backwards compatibility with existing GSM and UMTS technology.
The table below shows mobile data standards: The improved downlink and uplink data peak rate is around 5 times better compared to 3GPP release 7, and the improved round trip time is also 5 times better than 3GPP release 7.
Evolution Technology: The upper layers of LTE are based upon TCP/IP, which is an all-IP network similar to the current state of wired communications. LTE supports mixed types of data: text, voice, video and messaging traffic. LTE uses OFDM (Orthogonal Frequency Division Multiplexing) for downlink access technique, SC-FDMA (Single Carrier- Frequency Division Multiple Access) for uplink access technique and MIMO (Multiple Input Multiple Output) antenna technology similar to that used in the IEEE 802.11n wireless local area network (WLAN) standard. The higher signal to noise ratio (SNR) at the receiver enabled by MIMO, along with OFDM, provides improved coverage and throughput, especially in dense urban areas.
Mobile operators can upgrade existing infrastructure to support LTE rather than start from scratch. As a 4G technology, LTE becomes increasingly important to mobile operators as the amount of data traffic on their networks grows.
Mobile Data Standards
|384 Kbps||14 Mbps||28 Mbps||100 Mbps||> 1 Gbps|
|128 Kbps||5.7 Mbps||11 Mbps||50 Mbps||> 500 Mbps|
|150 mS||100 mS||50 mS||10 mS||5 mS|
|Rel 99/4||Rel 5/6||Rel 7||Rel 8||Rel 10|
|Deployment||2003||2005 – 2007||2008||2009||~ 2014|