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View Full Version : Question Throughput difference between Uplink and downlink?



fahmi
2011-11-04, 03:57 AM
Why in each technology we have an important throughput difference between Uplink and downlink? For example in LTE we have U/D = 75/303 Mbps (LTE 2*20 MHz & 4*4 MIMO). Is that due to hardware limited capacity in mobile side? Or to the fact that there is no need to higher data rate in uplink despite the hardware capability (so cost reduction). ?

beniy
2011-11-04, 05:06 AM
Why in each technology we have an important throughput difference between Uplink and downlink? For example in LTE we have U/D = 75/303 Mbps (LTE 2*20 MHz & 4*4 MIMO). Is that due to hardware limited capacity in mobile side? Or to the fact that there is no need to higher data rate in uplink despite the hardware capability (so cost reduction). ?
Hi Dude,
Just for quick answer.look at your self.. which one you are doing more:
Upload or download.
For example about net exploring you send just www.yahoo.com (http://www.yahoo.com) but it will download one page with so many pictures.
That's the reason just in Voice UL and DL are same because that's no diffrent.
And to share bandwidth that reasonable to has more share for downlink.
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fahmi
2011-11-04, 05:39 AM
Hi Dude,
Just for quick answer.look at your self.. which one you are doing more:
Upload or download.
For example about net exploring you send just www.yahoo.com (http://www.yahoo.com) but it will download one page with so many pictures.
That's the reason just in Voice UL and DL are same because that's no diffrent.
And to share bandwidth that reasonable to has more share for downlink.
-----------
Please Push reputation if that was useful

Ok, I understand the fact that we need higher data rate for DL than UL, but I am wondering how the throughput in UL is limited. :confused:

wolverine
2011-11-04, 06:16 AM
For LTE MIMO is used in the DL only so that is why you get 150Mbps in the DL (2x2 MIMO) and only half that, 75Mbps, in the UL.

As well as the reason that typical usage is assymetric, you also have power constraints on the UE side that you have to consider, therefore the UL is typically lower the the DL even though the bandwidth is the same.