PCU scheduling and PACCH timeout question

Hello. I'm trying to debug issue with current OsmoPCU master when some basebands ignore polling requests. The debug output from RLCMAC layer and corresponding .pcap files are attached to ticket http://projects.osmocom.org/issues/1524 The issue appears somewhere after line 112 in debug.log The corresponding packet in pcu.pcapng is 6866 After receiving PACKET_CONTROL_ACK from phone we're trying to schedule polling at FN 1137123 (see packet 6869 in pcap) and than at FN 1137127 (packet 6874) which subsequently fails. This seems suspiciously close but I have not found in the spec yet if this is legitimate thing to do. There are several other occurrences like that in both log and pcap. Have you experienced something like this? Do you have an idea why only some basebands are affected while others work fine? -- Max Suraev <msuraev(a)sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschaeftsfuehrer / Managing Directors: Holger Freyther, Harald Welte