LTE (Long Term Evolution)

1. It is a technology of 4G. 

2. LTE is divided into two parts.

A. TDD

B. FDD

TDD-

Downlink speed-  100mbs

Uplink speed-  50mbs

FDD-

Downlink speed-  100mbs

Uplink speed-  50mbs

3. LTE is a standard for wireless communication of high speed data for mobile phone and data          terminal it is based on GSM/EDGE and UMTS/HSPA. Network technologies. 

4. The architecture of LTE is easy.

LTE Functions :-     

1. Reduced Latency

2. Data rate high

3.Throughput high

4. Improve system capacity and coverage

5. Cost reduction per bit

Performance metric:-

1. Peak data (20mhz Bandwidth)

2. Control plane latency

3. User plane latency.

4. Average user throughput

5. Spectrum efficiency

Goal:-

1. 100 Mbps-DL and 50 mbps-UL

2. 100 ms idle to 50 ms

3.5 ms for small IP packet

4. DL- 3-4 times HSDPA and UL- 2-3 times HSUPA

LTE Feature:-

1. Simple N/W Architecture

2. High Data Throughput (macro enodeB and home enodeB)

3. Flexible & Expandable Spectrum Bandwidth

4. Support for multi Antenna scheme (upto 4*4 MIMO)

5. Time Frequency Scheduling on Shared Channel

6. Soft (Fractional) Frequency Reuse

7. Soft Organizing Network (SOM)

8. OFDMA for the Downlink & SC-FDMA for the Uplink to conserve power

9. Packet Switched Radio Interface

LTE Spectrum Flexibility:-

1. Operating Bands

2. Flexible Carrier = From 700mhz to 2600 mhz

3. Extensible Bandwidth = From 5mhz to 20mhz.