[srslte-users] Measuring latency

[Steffen Heber]

I have added a couple of new fileds in one of RRC layer meassges and wanted
to measure the end-to-end transmission delay/latency of that message
because of additional fields. To achieve that I did the following: synced
the time of sender and the receiver machines to the local timezone; used
gettimeofday function to find the timestamps of message transmission (t1)
and reception (t2) at the sender and the receiver; the transmission
timestamp (t1) was included in the message so that the receiver can compute
the latency, i.e., delta=t2-t1. Unfortunately, I always found delta less
than 0 ms.

Could anyone please give me any pointers to what I am doing wrong or a
better way to compute the latency of the message?

Thanks,
Steffen
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.srsran.com/pipermail/srsran-users/attachments/20181030/5358b7af/attachment.htm>