Self-Organized handover parameter configuration for LTE

Two main parameters influence the performance of Handover (HO) in Cellular systems, the Hysteresis (Hys) and the Time-To-Trigger (TTT). In Self-Organized Networks (SON) as has been proposed for LTE, the SON methods configure and optimize these two parameters to optimize HO performance. In this paper, we model the LTE HO procedure and propose an algorithm for self-configuration of the two HO trigger parameters. We model HO performance in terms of HO rate, the Ping-Pong rate, and the Radio Link Failure rate. We observe that the optimum trigger combination can occur anywhere within the parameter space depending on the relative importance given to each of the performance metrics as implemented using a weighting function. This motivates our HO configuration algorithm that searches for optimum parameter values by undertaking optimization one parameter at a time.

[2]  Preben E. Mogensen,et al.  Performance Analysis of Handover Measurements and Layer 3 Filtering for Utran LTE , 2007, 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications.

[3]  Ingrid Moerman,et al.  Handover Parameter Optimization in LTE Self-Organizing Networks , 2010, 2010 IEEE 72nd Vehicular Technology Conference - Fall.

[4]  Peter Legg,et al.  LTE Handover Optimisation Using Uplink ICIC , 2011, 2011 IEEE 73rd Vehicular Technology Conference (VTC Spring).

[5]  Min Wang,et al.  Handover within 3GPP LTE: Design Principles and Performance , 2009, 2009 IEEE 70th Vehicular Technology Conference Fall.

[6]  Ingrid Moerman,et al.  Enhanced weighted performance based handover optimization in LTE , 2011, 2011 Future Network & Mobile Summit.

[7]  Ingrid Moerman,et al.  An enhanced weighted performance-based handover parameter optimization algorithm for LTE networks , 2011, EURASIP J. Wirel. Commun. Netw..

[8]  Rolf Sigle,et al.  Improvement of LTE Handover Performance through Interference Coordination , 2009, VTC Spring 2009 - IEEE 69th Vehicular Technology Conference.

[9]  Peter Legg,et al.  A Simulation Study of LTE Intra-Frequency Handover Performance , 2010, 2010 IEEE 72nd Vehicular Technology Conference - Fall.

[10]  Ingrid Moerman,et al.  Weighted Performance Based Handover Parameter Optimization in LTE , 2011, 2011 IEEE 73rd Vehicular Technology Conference (VTC Spring).