Project

General

Profile

Actions

Bug #3063

closed

OsmoBSC + nanoBTS 165AU (DCS1800): smartphone Samsung 4mini 5 unable to register (it can on osmo-nitb)

Added by pespin about 6 years ago. Updated over 5 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
Category:
-
Target version:
-
Start date:
03/13/2018
Due date:
% Done:

100%

Spec Reference:

Description

I have been having issues to successfully register my Samsung 4mini 5 with a nanoBTS 165AU (DCS1800) connected to a osmocom (split components) network running latest master as of today.

nanoBTS is correctly connected and I see it being configured and it can be seen by all mobiles phones. IMPORTANT: If I try with an old samsung feature phone, it can register correctly. I see the CHANnel ReQuireD packet received from the nanoBTS and all the channel allocation works successfully. However, if I do the same with any of my 2 Samsung 4mini 5, no CHANnel ReQuireD packet is received and the phone keeps in a while with the "Registering to network XYZ" before giving up, and not being able to register. So basically my BSC sees no related event.

However, we just tested with roh's old osmo-nitb setup, and in there both mobile phones (the old feature phone and the smart phone) can connect successfully, so there's seems to be some kind of regression from osmo-nitb->osmo-bsc here.

I changed my config to be very similar to roh's osmo-nitb one, but still same result. I attach both configs here for comparison.

I also attach a pcap trace showing the BTS<->BSC link in operation (after initial OML setup, sorry) while I try to register both the feature phone and the smart phone. Only the Location Update from the feature phone can be seen (and it's rejected because I don't have the IMSI in my HLR, but that's not important here, because at least the LU is received).


Files

osmo-bsc-nanobts.cfg osmo-bsc-nanobts.cfg 3.44 KB pespin, 03/13/2018 06:38 PM
osmo-nitb.cfg osmo-nitb.cfg 1.39 KB pespin, 03/13/2018 06:39 PM
only-feature-phone-registers.pcapng only-feature-phone-registers.pcapng 107 KB pespin, 03/13/2018 06:47 PM
osmo-bsc-oml-setup.pcapng osmo-bsc-oml-setup.pcapng 30.7 KB pespin, 03/13/2018 06:52 PM
nanobts_bsc-oml-setup_nitb_roh.pcap nanobts_bsc-oml-setup_nitb_roh.pcap 42.2 KB roh, 03/14/2018 03:58 PM
ccch_scan_with_neigbhor_list.pcapng ccch_scan_with_neigbhor_list.pcapng 108 KB pespin, 11/05/2018 07:55 PM

Related issues

Related to OsmoBSC - Bug #3707: nanoBTS fails to startClosedlaforge11/26/2018

Actions
Actions

Also available in: Atom PDF

Add picture from clipboard (Maximum size: 48.8 MB)