What is subframe LTE?
In LTE, DL and UL transmissions are organized into radio frames of 10 ms each. Each frame is divided into ten equally sized subframes. The duration of each subframe is 1 ms. Moreover, each subframe is further divided into two equally sized time slots, that is, each slot is 0.5 ms.
How many slots does LTE subframe have?
2 slots
Each of sub frame consists of 2 slots, each of which is 0.5 ms in length.
Why are there 12 subcarriers in LTE?
In the downlink, the subcarriers are split into resource blocks. This enables the system to be able to compartmentalise the data across standard numbers of subcarriers. Resource blocks comprise 12 subcarriers, regardless of the overall LTE signal bandwidth. They also cover one slot in the time frame.
What is the difference between FDD and TDD in LTE?
LTE-FDD implies that downlink and uplink transmission take place in different, sufficiently separated, frequency bands, while TDD implies that downlink and uplink transmission take place in different, non overlapping time slots. Thus, TDD can operate in unpaired spectrum, whereas FDD requires paired spectrum.
Which is a special subframe in LTE TDD?
4G LTE TDD frame structure features Special Subframe: 10 milisecond radio frame consists of Downlink , Uplink and Special Sub Frames.
What is the frame structure for LTE type 2?
The frame structure for the type 2 frames used on LTE TDD is somewhat different. The 10 ms frame comprises two half frames, each 5 ms long. The LTE half-frames are further split into five subframes, each 1ms long. (shown for 5ms switch point periodicity).
How many frame configurations are there in TDD?
In TDD there are about 7 frame configurations, based on different DL/UL partition. Downlink/Uplink ratio can vary from 1/3 (Frame configuration = 0) to 8/1 (Frame configuration = 1). An operator can choose a specific TDD configuration depending on the service requirements
How many subframes of 5ms are there in TDD?
In TDD, there are two periodicity frame one with 5ms periodicity and another with 10 ms periodicity. Special subframe is introduced at subframe #1 and subframe #6 and each half frame of 5ms carries one special subframe in case of 5ms periodicity subframe.
