RIC action definition format 4

[yc541]

There may be some mismatch between the asn1 encoder/decoder implemented in srsRAN and FlexRIC. I did a bit more digging following #437
In the function e2_sm_kpm_action_definition_s::unpack(cbit_ref& bref), ric_style_type is correctly decoded to 4, but in the next line in function e2_sm_kpm_action_definition_s::action_definition_formats_c::unpack(cbit_ref& bref), the line e.unpack(bref) decodes it to 2 rather than 4.
To get around with this I slightly modified e2_sm_kpm_action_definition_s::action_definition_formats_c::set(types::options e) to get it to switch based on ric_style_type rather than type_ (the values of type_ are correctly assigned as well within the cases). With the changes the code initializes the correct action definition format 4 but there are still subsequent issues unpacking the AD (not sure if the changes are the cause). In the line HANDLE_CODE(unpack_dyn_seq_of(matching_ue_cond_list, bref, 1, 32768, true)), the nof_items(in the function definition in asn1_util.h) is decoded to 13569, which should probable be 1 since in the xapp's code only dst.matching_cond_lst[0] is defined.

I have attached the pcap of AD format 1 and 4.
pcap.zip

[HaoxinSEU]

Hi @yc541,

I'm also trying to make KPM REPORT style 4 work in srsRAN with the xapp_oran_moni in FlexRIC. But I think I encounter the same problem as you. Do you make any progress about this decoding? Or do you have more hints about how to go further?

Thanks!

[yc541]

Hello, I have not done any further debugging of this issue.

[pgawlowicz]

Hi @yc541,

We have just released a repository that allows running ORAN-SC-RIC as a multi-container Docker application with a single docker command. You can access the repository at: https://github.com/srsran/oran-sc-ric

Moreover, the repository includes two Python-based xApps examples designed to facilitate the requesting and monitoring of E2 metrics from the gNB. These examples cover all reporting styles (1-5) of the e2sm-kpm module, which has been updated to version 3.

To get started quickly, refer to the Quick Start section in the readme file.
Please note that until the next code release, you'll need to utilize the test branch from the srsRAN_Project repository.

We are currently working on an example xApp using e2sm_rc module.