Strange baseband crash/stats every day - iPhone with iOS 8.1.3

I found out very strange baseband logs in my iPhone 6, 64GB with iOS 8.1.3

Example is:

Version=4
IncidentIdentifier=5DC7BB6F-DE8E-4763-B57A-9186F9F063FE
Date=2015-02-17;AP=12B466;BB=1.04.00;Model=N61AP;Machine=iPhone7,2
6:57:50 +0100 ST [clm] disconnect: duration=0;cause=kNoError;modemErr=0;rat=2
9:36:20 +0100 ST [clm] disconnect: duration=299;cause=kNoError;modemErr=0;rat=0
9:49:43 +0100 ST [clm] disconnect: duration=0;cause=kNoError;modemErr=0;rat=0
9:57:49 +0100 ST [clm] disconnect: duration=459;cause=kNoError;modemErr=0;rat=0
11:13:56 +0100 ST [clm] disconnect: duration=0;cause=kUserBusy;modemErr=0;rat=2
11:14:16 +0100 ST [clm] disconnect: duration=0;cause=kUserBusy;modemErr=0;rat=2

What these mean? I read them like I was disconnected from my telco. Am I wrong, should I worry?