Analysis of Failure Calls Caused by Block Call and Handover on Mobile Communication Service in The Round of Lhokseumawe City

Besides the availability of telecommunications services, providers of mobile communication services must also attention to the quality of the services they provide. Quality of service can be seen from the percentage of call failures. The conditions that most often cause failures when making a call are block calls and handovers. A measurement-based analysis of data is needed that can be used by communication service providers to improve the quality of their services. This research was conducted in Lhokseumawe city with two different providers, Telkomsel and XL. Measurements were taken directly through the drivetest using TEMs Investigation software. After making a call, the data recorded are a block call and handover. It also recorded the drivetest parameter capacity of the call, that is Received Signal Code Power (RSCP) and Energy Chip per Noise (Ec / No). The results showed that the Telkomsel provider had done a quite good network optimization. This is indicated by the measured RSCP value of -82.00 dBm and Ec / No value of -12.00 dBm. There was no block call in the city of Lhokseumawe. A new block call occurs in the Geudong region with a RSCP value of -82.00 dBm and an Ec / No value of -23.00 dBm. Meanwhile, for XL providers, a block call has occurred in the Lhokseumawe city with a RSCP value of -107.00 dBm and an Ec / No value of -17.50 dBm. It is estimated that the cause of the block call is the signal level weakened due to the blocking area by buildings or trees. This shows that network optimization by XL is not good enough. When the drive test enters the Geudong region, data records cannot be performed due to the unavailability of 3G services of XL provider in this region. However, both Telkomsel and XL showed a 100% successful handover which means the percentage of failure was 0% or there was no failure when diverting calls. Key words: block call, handover, drivetest, RSCP, Ec/No