Cooperative Intelligent Transportation Systems (C-ITS) enhance road safety and traffic management. GLOSA (Green Light Optimized Speed Advisory) is an ITS service that helps reduce traffic jam. In this paper, we present a strategy algorithm for GLOSA called Speed Advisory Boundary fINder (SABIN) that allows vehicles to pass a traffic light when it is green as fast as possible or as slow as possible. We evaluated SABIN in terms of average stoppage time, travel time, average number of stopped vehicles and fuel consumption. We also evaluate the impact of network performance on SABIN.