How to limit the Rx rate for an UE (bulksend app) - LTE scenario

[Augusto Franco]

Hi there,

I'm simulating a LTE scenario (ns-3.25) and I want to limit the donwlink rate for the UEs up to 1Mbps.
I simulating a file download (FTP) with the Bulk application... there you can limit the amount of data, but not the tx rate.

I'm also tried the qos parameters for the eps-bearer creating a certain NGBR bearer with a specific mbrDl;  /**< Maximum Bit Rate (bit/s) in downlink */ but it doesn´t work either.

Appreciate any help

Bye

[Konstantinos]

Hi Augusto,

There was a similar question recently in the list and the answer was, you can not control the rate of Bulk application.

The way Bulk works is as the name suggests, bulk... send as much as you can if there is available data/space to send.

So, if you want to control the limit to a specific 'constant' rate, you have to change the application or configure the received TCP socket to a reduced RxBuffer, something called TCP tunning (https://en.wikipedia.org/wiki/TCP_tuning). This will cause a reduced throughput.