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19 BSS21542 OSC Capability Test for Handsets

19 BSS21542 OSC Capability Test for Handsets

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Flexi EDGE BTS Feature Descriptions

BTS decides when to start the OSC Capability Test. The decision is based on DL RX

quality reports received from the MS. If the reported downlink RX quality is equal to or

better than a new DL RX quality threshold for OSC capability test parameter, the test is


BTS sends boosted QPSK over test period to probe handset’s OSC capability.

Test Report Generation and Inference

BSC determines handset OSC capability by comparing DL Rx Quality values from test

period to DL Rx Quality values prior to the test period. If DL Rx Quality remains acceptable during the test period then BSC regards the handset as OSC capable. If DL Rx

Quality degrades to unacceptable level or BSC cannot complete the comparison then it

regards the handset as OSC incapable.BSC maintains handset OSC capability test

result until the end of the call or until the handset is handed over to other BSC.

Detecting and Handling of MS with Faulty SAIC Indicator

Handsets that indicate SAIC support to the network are regarded as non OSC capable

by the BSC if, the DL RX quality of these handsets decreases drastically right after OSC

multiplexing. In such a scenario, BSC does not select the handset again for multiplexing

for the remaining duration of the call.


The feature increases network capacity by increasing OSC utilization

The feature improves network quality and reduces call drop rate by identifying SAIC

capable MSs that cannot survive in OSC mode





NetAct OSS5.4 CD Set 2

MS capable of SAIC but not reporting and capable of non-OSC but SAIC reporting




Flexi EDGE BTS Feature Descriptions


4 Interworking


BSS10101 GSM-WCDMA Interworking

In order for an operator to provide seamless coverage in areas where WCDMA is not

available, such as rural areas, inter-system handovers are introduced. This feature facilitates handovers between GSM BSS and WCDMA RAN. When the WCDMA and GSM

networks overlap, also an inter-system handover from GSM to WCDMA can be made to

release traffic load in the GSM system.

Flexi EDGE BTS supports this feature as a GSM EDGE Base Station.





Flexi EDGE BTS Feature Descriptions


BSS11086 Support for Enhanced Measurement Report

Support for Enhanced Measurement Report (EMR) provides the system with enhanced

serving and neighbour cell measurements. This is achieved by requesting the mobile

station (MS) to use the EMR for reporting downlink measurements.

Enhanced Measurement Report also provides the system with information such as

Downlink Frame Erasure Rate (DL FER), the usage of bit error probability (BEP) instead

of RX Quality during the DTX frames, and the support for reporting WCDMA RAN neighbour cells. In addition, the EMR also provides an extended range for the serving and

neighbour cells downlink signal strength and the possibility to report altogether up to 15

GSM and/or WCDMA RAN neighbour cells in one report.

These reports can be used by the network to enhance the generic performance of the

existing system, enable GSM/WCDMA interworking, and enhance several Nokia features, such as:

Automated Planning

Dynamic Frequency Channel Allocation (DFCA)

FER Measurement

Intelligent Underlay Overlay (IUO) and Intelligent Frequency Hopping (IFH)

Interaction with other features:

The network does not order an MS to use the EMR for reporting when an Idle Broadcast Control Channel (BCCH) Allocation List or a Measurement BCCH Allocation

List is used in active state in the serving cell.

With Common BCCH Control, when a call is in a non-BCCH frequency band, the

serving cell BCCH frequency is added to the BCCH frequency list.

When the EMR is used for reporting, also the serving cell BSIC is added to the BSIC

list before sending it to an MS.



Improved generic performance of the system

Enables GSM/EDGE/WCDMA interworking

Improved performance of statistics




Flexi EDGE BTS Feature Descriptions


Collecting logs using Snapshot feature

The 2G Flexi BTS Site Manager can be used for collecting the logs using File -> Save

As -> Save Snapshot option. It is recommended to collect logs using this feature everytime while troubleshooting the site or when a problem ticket is created.


Snapshot is meant to help NSN R&D to analyze and resolve the tickets. It cannot be

opened or analysed in the field nor browsed with an off-line 2G Flexi BTS Site Manager.


Not all internal logs are always available, so those will be skipped when the Snapshot is

being fetched. For example, when the BTS is uncommissioned state, SCF and commissioning report will not be available.

The following logs can be collected using Snapshot feature:

1. Site Information Report - Collect logs and display the status for complete site information.

2. UKPT Logs - Collect internal logs for system module.

3. EMLogs & EMGCSLogs - Collects information on actions performed with 2G Flexi

BTS Site Manager.





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19 BSS21542 OSC Capability Test for Handsets

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