This commit introduces several enhancements in X2AP and RRC to deal
with ENDC. The main goal is to deal with UE's on/off and with various
errors.
The following work is included:
- DC prep and DC overall X2 timers
- X2 messages for UE release and DC timers' timeout
Open problems:
- what to do when the UE sends an scg Failure? This commit removes
the UE. And this removal may not be correctly done
- UE removal in the gNB's PHY layer (a next commit is coming,
but it is hackish and will need a rework)
In the configuration file, to enable measurements, add:
enable_measurement_reports = "yes";
Note that if x2 is enabled then the option 'enable_measurement_reports'
is not taken into account and the measurements are enabled.
This commit introduces X2AP timers (t_reloc_prep, tx2_reloc_overall).
You need to set the values in the configuration file.
X2AP can be enabled or disabled in the configuration file too (disabled
by default).
Some deadcode was removed.
Introduction of S1-flex. It handles multiple PLMN IDs (up to 6) in the SIB as well as the selection of an MME based on the selected PLMN identity.
Major impact: changes on the eNB configuration files:
tracking_area_code = 1;
plmn_list = (
{ mcc = 208; mnc = 94; mnc_length = 2; },
{ mcc = 208; mnc = 95; mnc_length = 2; }
)
See https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/s1-flex-conf-nnsf for more details.
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>
Robert Schmidt