【资料名称】：Handling Common Problem Situations in BSC

【资料作者】：nsn

【资料日期】：2012

【资料语言】：英文

【资料格式】：DOC

【资料目录和简介】：

Problems with radio network configuration and recovery 13
3.1 Modifying radio network configuration fails due to lack of resources 13
3.2 Outputting or modifying radio network configuration fails without obvious
reason 14
3.3 Radio network object is not found in BSDATA 16
3.4 BCF configuration with EDGE and non-EDGE TRXs in the same BTS
fails 17
3.5 TRX LAPD links remain in the UA-AD RN RECOV state without an active
alarm 18
4 Problems with circuit-switched calls 21
4.1 Inter-system handover BSC-RNC-BSC fails 21
4.2 Activating AMR HR (HR3) with parameter HR_FEATURE_IN_BSC
fails 22
4.3 Cell Broadcast Centre does not work 22
4.4 Circuit-switched call fails with alarm 1582 CONNECTION OR RELEASE
ERROR 23
4.5 BSC-BSC interface configuration to only one BCSU unit causes problems
during BCSU switchover 24
4.6 Alarm 7737 INCONSISTENT DATA IN RADIO RESOURCE
MANAGEMENT STATE FILES is raised 24
4.7 Alarm 7741 MEAN HOLDING TIME ABOVE DEFINED THRESHOLD is
raised 25
4.8 Alarm 2725 ADJACENT CELL IDENTIFIER CONFIGURATION ERROR is
raised 26
5 Problems with packet-switched calls 29
5.1 Problems with TBF establishment 29
5.1.1 TBF establishment fails due to lack of Abis channel resources 29
5.2 Problems with (E)GPRS cell changes 30
5.2.1 High NCCR failure rate 30
5.3 Problems with transmission in the Abis interface 32
5.3.1 Continuous resynchronisation 33
5.3.2 Unsuccessful initial synchronisation or resynchronisation 34
5.3.3 No PCU synchronisation frames received from the BTS 35
5.3.4 BPN jump in synchronisation time 36
5.3.5 TBFs do not have enough EDAP resources 37
5.3.6 EDAP configuration fails 38
DN05104459
Issue 1-1 en
# Nokia Corporation 3 (71)
Contents5.4 Problems with transmission in the Gb interface 40
5.4.1 Inconsistent BVCI states between the BSC, the PCU and the SGSN 40
5.4.2 BSSGP protocol error raised with the cause code 0x20 or 0x21 41
5.4.3 BVCI operational state remains UNBLOCKED 41
5.5 Problems with performance 42
5.5.1 Low DL (E)GPRS throughput 42
5.6 Problems with territory operations 44
5.6.1 (E)GPRS territory failures 44
6 Problems with synchronisation 47
6.1 Incoming synchronisation from an external source fails 47
6.2 Clock and Synchronisation Unit fails 50
6.3 Timing signal distribution fails 52
7 Problems with operation and maintenance 55
7.1 Problems with MMLs 55
7.1.1 Faulty character spacing in ZQWL printout 55
7.2 Problems with Q3 connections 56
7.2.1 BSC alarms are missing from Nokia NetAct 56
7.2.2 BSC measurement files are missing from Nokia NetAct 57
7.2.3 Creating and modifying RNW objects with Nokia NetAct applications
fails 59
7.2.4 Uploading RNW objects data with Nokia NetAct applications fails 59
7.2.5 All connections from the BSC to Nokia NetAct are lost 60
7.3 Problems with software package handling 61
7.3.1 Change delivery installation fails 61
7.3.2 Multiple change delivery installation fails 61
7.4 Problems with licence handling 62
7.4.1 Licence installation fails, licence file not found 63
7.4.2 Licence installation fails, licence file already found 63
7.4.3 Licence installation fails, licence is not valid 64
7.4.4 Licence installation succeeds, but copying or deleting the licence file
fails 65
7.4.5 Interrogating installed licences or features fails 65
7.4.6 Licence database is corrupted 66
7.4.7 Licence file cannot be handled by Nokia NetAct Licence Manager 67
8 Problems with location-based services 69
8.1 BSC gives inaccurate location estimates with the cell-based m