A Study for Connection Establishment in Femtocell Network

The F-BSs (Fem to-Base Stations) are deployed indoors and connect to the mobile core network through fixed broadband access network which is paid by users. The power and serviced cell of an F-BS is much smaller than that of an outdoor M-BS (Macro-Base Station). However, F-BS is a good solution to improve the indoor coverage and to reduce the number of outdoor M-BSs and the therefore cost, including backhaul costs. Therefore, the tariff for connections through FBSs should be cheaper than those through M-BSs. Thus, users would prefer make connections via F-BSs rather than via MBSs. This paper proposes a novel scheme by redirecting an idle UE (User Equipment) to its accessible F-BS, if available, whenever the UE makes a call. This novel scheme is completely compatible to existing 3GPP standards and can be adopted in RNCs (Radio Network Controllers) immediately. Our study shows the proposed scheme does increase the probability of making calls via F-BSs in terms of longer call setup time.