Downlink Data rate is more than Uplink data rate

Question

Hi everyone,
I m just a newbie and just wanted to know why Downlink Data rate is more than Uplink data rate

Answer 1

Downlink uses OFDMA radio access mechanism while uplink uses SC-FDMA that is the main reason data throughput in less in uplink compare to downlink. There would be other factors also but as per my knowledge, radio access mechanism is the main reason for difference in throughput of DL and UL.

Comments

Thanks Harshita :)

Answer 2

UL data rate is less because
1. UL prb allocation for pusch is less compare to DL pdsch allocation. In UL , ue need to have prb for pucch and rach .
2. In UL , ue transmit from one antenna only but in DL can receive from 2 antenna.
3. In UL 16/64 qam modulation is used while in DL 64/256 qam can be used.

Comments

Thanks Veer