Analisis Pengaruh Down Tilt Antena Untuk Mengurangi Kegagalanhan dover Pada Jaringan Seluler GSM PT. Indosat, Tbk. Purwokerto
Abstract: Handover is a
process to guarantee the MS (Mobile Station) communication connection while
moving for one cell to another cell. There are 10,89%-12,04% handover failure
occurred between BTS Cilongok sector 1 and BTS Karanglewas sector 3 of PT.
Indosat, Tbk,Purwokerto, whereas, thestandard is 2%-3%. Based on KPI (Key
Performance Indicator) data most of handover failure is caused by long
overlapping coverage (1,2851 km) as could be seen in BSC Controlled Inc. HO
Fail at the amount of 9,69%-10,24%. Long overlapping coverage also reduce Rx
Level signal quality to-94 dBm (threshold-90 dBm), and Rx Qual is 2,26 (it is
still good enough if comparing to the threshold 5). Down tilt antenna method is
used to overcome the overlapping coverage. Calculation result of down tilt
antenna points out that the precise down tilt antenna to be applied in BTS
Cilongok sector 1 is 3º and BTS Karanglewas sector 3 is 2,5º with number of
overlapping coverage 78,2 m (appropriate to reference of PT. Indosat, Tbk
Purwokerto�100 m). After
down tilting antenna indicates that there is a reduction of handover failure
because of overlapping coverage reduce to 0,01%- 0,02%, and total handover
failure reduce to 0,62%- 1,39% . Meanwhile there is a raising in signal
quality,it is Rx Level become-75 dBm and thebetter size of Rx Qual is 1.
Penulis: Wahyu Dewantara, Azis
Wisnu Widhi Nugraha, Widhiatmoko Hery Purnomo
Kode Jurnal: jptindustridd100093