Issue with Long Run 2 - Issue with Periodic routing area update request
This issue is seen with continuous traffic at PCU in DL. After t3312 expires MS will try Periodic routing area procedure(GMM RA UPDATE REQUEST) and SGSN will reply back with "ROUTING AREA UPDATE ACCEPT" but it is not received by MS. resulting in re transmission of "ROUTING AREA UPDATE ACCEPT" and finally trying with RACH and PCU gets print like
bts.cpp:1226 Got RACH from TLLI=0xda425459 while TBF still exists. Release pending DL TBF=0
causing break in DL traffic(with TCP traffic the issue is severe. causing disconnection of TCP traffic). This issue is show stopper.
Currently t3312 is set with high value in osmo-sgsn.cfg to avoid this condition.