Reducing the rate of fall call GSM mobile network by means of adjustment of parameters of coverage / Redução da taxa de queda de chamada em rede celular GSM por meio de ajustes dos parâmetros de cobertura
AUTOR(ES)
Gabriel Fernando Pivaro Leite da Conceição
DATA DE PUBLICAÇÃO
2008
RESUMO
A study about the main causes of dropped calls in mobile network cell GSM is made by means of statistical traffic analysis. The aim is to minimize the effect of these causes through coverage parameters changes, such as dynamical potency control, coverage border between cells, correct definition of neighboring cells. The reduction of dropped call rate by means of optimization of coverage parameters, changed via remote commands, eliminates costs with physical changes, such as the height of the antennas and installation of new radio base station. Parameter changes, however, must be carefully made because they can degrade other indicators and bring coverage area and traffic reduction. The two main causes of dropped call are sudden loss of connection, due to failure in the equipment used, behavior of subscribers and the failure in handover and drops due to the low signal strength in the air interface. In this study, based on statistical data of GSM traffic, a cell operating in 900 MHz that presented high dropped call rate was chosen. Adjusting the coverage parameters, the monthly dropped call rate went from 8.6% to 1.6% and there wasnt any degradation of any other performance indicators.
ASSUNTO(S)
retenção de chamada indicadores de desempenho performance indicators gsm quality of service comunicação móvel celular dropped call rate mobile cell-phone communication gsm qualidade de serviço call retention taxa de queda de chamada
