openbmap
UMTS measurements broken
What steps will reproduce the problem?
1. Log cells for a while
2. Go to cell overview and analyse UMTS measurements
What is the expected output? What do you see instead?
At least PSC should be available. Instead all cells have base id = -1 and psc =
-1. (Cell id is also -1 , but this is normal for UMTS according to Android
documentation).
Tested with Nexus 4, r1dc7729faa03
Please use labels and text to provide additional information.
Original issue reported on code.google.com by wish7code on 1 Oct 2013 at 11:02
This may be a constraint of the radio firmware/driver stack. The Nexus S, for example, always reports a PSC of -1 for the serving cells, and it does not report any neighboring cells at all. The OnePlusOne, on the other hand, reports both the serving cell and neighboring cells with valid PSCs.
As for neighboring cells: on UMTS and LTE you will never see their LAC/CID unless you connect to the cell. This is a property of the network layer. (GSM is different, as it it TDMA-based rather than CDMA-based, thus the concept of a PSC does not apply to GSM.)
If you want to see what your phone's firmware supports, try SatStat (for the moment, you'll have to build it yourself from git as the latest F-Droid release still has some bugs here).
