A Handover Scheme for TD-SCDMA Femtocell Networks

As we know, 50% voice call and 70% data traffic originate indoor, in order to provide a good indoor coverage, operators prefer to let subscriber s deploy femtocells indoor instead of deploy distributed antenna systems (DAS) or Pico cells by themselves. This indoor coverage solution will offload traffic from outdoor macro cell significantly, enhance service quality and facilitate high data rate services due to the improved performance of radio links. However, handover procedures for the femtocell/macrocell network are different from the exiting macro cells handovers. Because of small coverage of femtocell, handover between femtocell and macro cell will happen frequently, so how to perform the handover with minimum signaling is very important. This work studies the handover between home femtocells and macro cell, in order to study mobility management schemes for this small scale femtocell networks deployment, firstly we present the femtocell network access architecture, then we proposed a brand new handover scheme for femtocells network. Then a detailed performance analysis of handover control has been made. Finally, a simple but effective scheme to minimize the unnecessary handovers has been proposed.