HSDPA Frame Loss

These counters relating to frame loss are available on the RBS to monitor HighSpeed data service in the downlink direction.

IubDataStreams::pmHsDataFramesLostSpiXX
- the number of HSdata frames lost, destroyed and errored over Iub in the RBS. There areseparate counters for each of the priority classes.

IubDataStreams::pmHsDataFramesReceivedSpiXX
- the totalnumber of HS data frames correctly received over Iub in the RBS. Thereare separate counters for each of the priority classes.

The XX suffix represents the priority class and can range from 00 to 15.The counters can be used to indicate data loss rate for the HS service.High frame loss will indicate potential congestion problems. RecommendedPerformance Indicator for this is:



Frame Loss Rate on the path from SRNC to RBS

Find more HSDPA Counters at www.telecomfunda.com/forum

Pilot Channel failure - High Downlink Interference

Symptoms:

From the drive test, following symptoms will be observed by using TEMS:

• Received Ec/No of the pilot channel is less than –16dB and

• Received RSCP of the pilot channel is high enough to maintain the connection,e.g. >-   100dBm and

• DL RSSI is very high and

• The connection finally drops.

Good Excel Sheet on CPICH Calculator

CPICH Optimization

Good Document on CPICH Optimization from Maxis

CPICH Optimization

You can view Document Here

Content

• Objective
• Technical Background
• Deployment Area
• Performance Results
• Traffic Results
• Capacity Results
• Summary

Download Full Document in PDF from Here

Deployment of CPICH optimization is driven by:
–Improving current 3G coverage and increase 3G traffic
–Improve in-building penetration for 3G
–Reduce IRAT HO to 2G
–Offload traffic from 2G layer

How Can We Avoide IRAT Handover?
Traffic Shift Strategy for 3G to 2G