Gsm Kpis 211c47

GSM Base Station Subsystem (BSS) KPI analysis KPI means for key performance indicator, which is measure from all the related aspect of network such as call setup success rate (CSSR), Handover success rate (HOSR), Paging, network access, congestion etc. From KPI report Radio Network Optimizer’'s took decision or provide prescription for the network. For KPI analysis usually data is collected from drive test of Radio Access Network (RAN), error log of network equipment and Base Station Controller (BSC) data. After combining data we can draw symmetric graph using GSM KPI tools. Short lists of GSM KPI tools:  Mapinfo.  TEMS Investigatation.  NEMO.  ACTRIX.  Microsoft Excel and Access etc There are numerous KPI and optimization tools for GSM network, but above tools are widely used. From BSC we collect traffic data and system performance data, this data represent salient status of the network, resource utilization, Hardware load etc. After analyzing this data we can make decision on network planning, network monitoring and network performance. BSS KPI Issue:  Paging success rate  Standalone dedicated control Channel (SDCCH) availability rate.  Standalone dedicated control Channel (SDCCH) congestion rate.  Immediate assignment success rate.  Standalone dedicated control Channel (SDCCH) call drop rate.  Traffic channel (TCH) availability.  Traffic channel (TCH) call drop rate.  Traffic channel (TCH) congestion rate.  Traffic channel (TCH) assignment success rate.  Handover Success rate (HOSR)  Call setup success rate (CSSR)  Call complete success rate (CCSR)  Call setup delay. Above thirteen issues are important for network performance and this issues are directly impacts on the experience about the network. On the other hand every single issue is depending on the multiple variables and as well as each other. Like low success rate of Handover (HOSR) decreases Call complete success rate (CCSR). Lower value of KPI depends on flowing:  Geo and Meta data issues.  Network Planning and implementation error.  Hardware failure or Hardware Capacity issues.  Resource constraint (Frequency Band and ARFCN). A GSM KPI’s widely depends on the network parameter; such as azimuth, mechanical tilting, electrical tilting, feeder length, feeder type and antenna height etc. Mismatch on network parameter decreases the KPI value. KPI is also depends on the core and transmission network parameter. Note: GSM network may classified into three parts, these are  Radio access network (RAN)  Core network (CN) and  Transmission network (TN).

Ideal value of KPI is 100, expressed in percentage. In practical it’s not possible to achieve 100. But you should try to increase KPI values as much as possible. A good example of high KPI is Airtel network in Bangladesh. It’s about 94% in R2 region; R2 region is eastern belt of country, from Sylhet to Cox’s Bazar including Comilla and Chittagong.