URLLC Scheduling

[praghur]

Hello all.

I want to create a scheduling policy for URLLC traffic in presence of non-critical traffic. When the traffic belongs to a particular slice, it needs to be provided priority compared to traffic with the rest of the slices.

Is it possible to do this? Any insight on how can I get started on it? Thanks in advance.

[pgawlowicz]

Please check this answer: #756 (reply in thread)

[frankist]

@praghur, can you clarify a bit further what you want to do? In particular, would the current approach of setting a minimum number of PRBs not be enough for what you are trying to achieve?

[praghur]

Thanks a lot for the tip. Yes that works, actually.

…

On Sat, Oct 5, 2024 at 2:26 PM Francisco Paisana ***@***.***> wrote: @praghur <https://github.com/praghur>, can you clarify a bit further what you want to do? In particular, would the current approach of setting a minimum number of PRBs not be enough for what you are trying to achieve? — Reply to this email directly, view it on GitHub <#839 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BHS6HHOJI556I5LRNSNCV33Z2AVOHAVCNFSM6AAAAABPCBXGKWVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTAOBVGQZDCMA> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[praghur]

Sorry to re-open this item. I tried to change the minimum number of PRBs for each slice. I went from:

  slicing:
   - sst: 1
     sd: 0x000001
     sched_cfg:
       min_prb_policy_ratio: 50
       max_prb_policy_ratio: 75

To:

 slicing:
   - sst: 1
     sd: 0x000001
     sched_cfg:
       min_prb_policy_ratio: 90
       max_prb_policy_ratio: 100

I am surprised that this does not change the latency of the UDP packets that I am sending via traceroute. I was thinking that reserving PRBs will improve the latency. I am looking to improve the latency of the data packets sent via the 5G network. Are there any techniques to achieve this? The configuration files for gNBs is attached. The rest of the configuration files are provided in link

Thanks in advance.
gnb_x310_1.txt

[herlesupreeth]

@praghur I dont think the latency changes with increase in min_prb_policy_ratio as it just allowed more (volume) UDP data to have prioritized treatment

I am looking to improve the latency of the data packets sent via the 5G network. Are there any techniques to achieve this?

If you want to improve latency then I would recommend take a look at the low_latency.yml file under configs folder

[praghur]

Thank you for your response. Yes, I did take a look at low_latency.yml file. The content of the file is now integrated into gnb_x310_1.txt - Line 36 onwards. If there are other ways to further reduce the latency, I would be very interested in it. Thanks a lot.

[herlesupreeth]

Oops, didnt notice it earlier. @praghur If I may ask, how much latency you are seeing and how much lower you want to go? The lowest latency we have seen is around 10-15ms

[praghur]

In an indoor environment, for a path of UE1 --> gNB1 --> CN --> gNB2 --> UE2, I am getting a latency around 11 ms. Ideally, it would be good to obtain latencies of around 8 ms, for the application in focus. Thanks for sharing the latency you have obtained. That is really useful.

…

On Wed, Oct 16, 2024 at 12:11 PM Supreeth Herle ***@***.***> wrote: Oops, didnt notice it earlier. @praghur <https://github.com/praghur> If I may ask, how much latency you are seeing and how much lower you want to go? The lowest latency we have seen is around 10-15ms — Reply to this email directly, view it on GitHub <#839 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BHS6HHPU2LTN24JAC6JPG3LZ32F2FAVCNFSM6AAAAABPCBXGKWVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTAOJWGE4TONI> . You are receiving this because you were mentioned.Message ID: ***@***.***>