Handover procedure and decision strategy in LTE-based femtocell network

Wireless systems have the capability to serve users over broad geographic area without using a costly network infrastructure. However, the main drawback of these systems represents the bandwidth restrictions and coverage. Deployment of femtocell as the emerging promising wireless access technology becomes one of possible solution how to overcome some of the drawbacks. In this paper, we investigate the handover procedure in femtocell network considering, both types of handovers, horizontal and vertical. The 3GPP LTE based handover procedure is analysed for three scenarios: hand-in, hand-out and inter-FAP. In addition, the reactive handover decision policy, based on the prediction of user movement and the prediction of target-FAP, is proposed as a way to eliminate frequent and unnecessary handovers.

[1]  Sungho Choi,et al.  Improvements to seamless vertical handover between mobile WiMAX and 3GPP UTRAN through the evolved packet core , 2009, IEEE Communications Magazine.

[2]  Hsin-Yi Lee,et al.  A cache scheme for femtocell reselection , 2010, IEEE Communications Letters.

[3]  Paolo Bellavista,et al.  Adaptive Buffering-Based on Handoff Prediction for Wireless Internet Continuous Services , 2005, HPCC.

[4]  Yanghee Choi,et al.  Vertical handovers in multiple heterogeneous wireless networks: a measurement study for the future internet , 2010, CFI.

[5]  Apostolis K. Salkintzis,et al.  Seamless integration of mobile WiMAX in 3GPP networks , 2008, IEEE Communications Magazine.

[6]  Douglas N. Knisely,et al.  Standardization of femtocells in 3GPP2 , 2009, IEEE Communications Magazine.

[7]  Tae-Sub Kim,et al.  Vertical handover between LTE and wireless LAN systems based on common resource management (CRRM) and generic link layer (GLL) , 2009, ICIS.

[8]  Won Ryu,et al.  Handover between macrocell and femtocell for UMTS based networks , 2009, 2009 11th International Conference on Advanced Communication Technology.

[9]  Wei Zheng,et al.  A Novel Handover Mechanism Between Femtocell and Macrocell for LTE Based Networks , 2010, 2010 Second International Conference on Communication Software and Networks.

[10]  Navrati Saxena,et al.  Mobility Management Survey for Home-eNB Based 3GPP LTE Systems , 2008, J. Inf. Process. Syst..

[11]  Tsunehiko Chiba,et al.  Efficient Route Optimization Methods for Femtocell-Based All IP Networks , 2009, 2009 IEEE International Conference on Wireless and Mobile Computing, Networking and Communications.