E2 metrics

[apperezG]

Good afternoon!

I'm configuring a deployment with srsRAN Project and FlexRIC. I'm trying to obtain different metrics to introduce them as input features to a neural network.

In srsRAN Project there is a file that lists the available metrics https://github.com/srsran/srsRAN_Project/blob/main/lib/e2/e2sm/e2sm_kpm/e2sm_kpm_du_meas_provider_impl.cpp. For now I am using the CQI, RSRP and RSRQ.

But looking at this file it seems that both e2sm_kpm_du_meas_meas_provider_impl::get_rsrp (RSRP value) and e2sm_kpm_du_meas_provider_impl::get_rsrq (RSRQ value) get the same metric named ue_metrics.pusch_snr_db. Is this a bug or is it obtained this way for some reason?

Another question I have is: Do you plan to introduce more metrics in the near future?

Thank you in advance

[pgawlowicz]

Hi,
those CQI, RSRP, and RSRQ are some dummy metrics, that will be removed soon. We are currently working to add more metrics that are described in the ORAN documents - here we will all metrics available in the ORAN documents.

The metrics that are currently implemented are listed here.

More metrics is coming soon.

[pgawlowicz]

@apperezG Please check our updated tutorial, where we use the br-flexric branch that allows specifying metric names using a config file that is passed to a xApp.

[apperezG]

Good morning @pgawlowicz !

Thank you for the new tutorial, it's much easier!
However, I encountered some problems working with the example. The output should be like this (requesting the DRB.UEThpDl and DRB.UEThpUl metrics):

My configuration file is this one:

SM_DIR = "/usr/local/lib/flexric/"

# supported name = xApp
Name = "xApp"
NearRT_RIC_IP = "192.168.20.2"
E42_Port = 36422

# supported name : KPM
# supported time (ms): 1000
# supported format: 1
# supported ran_type: ngran_gNB
Sub_ORAN_SM_List = (
    { name = "KPM", time = 1000,
      format = 1,
      ran_type = "ngran_gNB",
      actions = (
            { name = "CQI" },
            { name = "RSRP" },
            { name = "DRB.UEThpDl" },
            { name = "DRB.UEThpUl" }
            )
    }
)

xApp_DB = {
    enable = "OFF"
    ip = "127.0.0.1"
    dir = "/tmp/"
    filename = "testdb"
    username = "your_username" # if using mysql
    password = "your_passwd" # if using mysql
}

And my output is this one:

Here you can see how the CQI and RSRP values are returned correctly but the DRB.UEThpDl and DRB.UEThpU values are not.

[pgawlowicz]

What does happen if you request only the two metrics in the xApp config file?

            { name = "DRB.UEThpDl" },
            { name = "DRB.UEThpUl" }

Also, did you try sending more UL data, for example with the following command:

sudo ip netns exec ue1 iperf -c 10.45.1.1 -u -b 10M -i 1 -t 60

[pgawlowicz]

Is there any change if you disable iperf?

BTW. you are getting a lot of RF issues, did you run srsran_performance on both gnb and srsUE hosts?

[apperezG]

Executing a simple ping I have the following output:

I executed the srsran_performance and the xApp gives me the same output.

[pgawlowicz]

could you send ping more frequently with -i 0.1 option? I think the traffic volume is simply too low. And the metric unit is kbps.

[apperezG]

The metric is still kept at 0 despite the addition of the option

[pgawlowicz]

could you tell me the command you use to ping? also could you print the routing table on this host? using route -n