WiMAX femtocells are currently under the development and they are expected to play an important role in the development of indoor broadband wireless access. The presence of multiple femtocell overlapped with the WiMAX network for the purpose of improving the coverage, but the handover process in cellular network will become more complicated and may have a chance of frequent handover. This paper thus proposes the triangulation mechanism to find the exact location of MS.velocity decision handover mechanism is used to reduce neighbor cell list for successful handover. The simulation results show that our scheme improves scanning performance and also effective in terms of performance metrics, including decrease in handover delay, increase in throughputs, and bandwidth utilization. . KeywordsFemtocell, WIMAX, Handover, Quality of Service (QoS)