Mobility management in heterogeneous networks

In this report, an overview of mobility management in heterogeneous networks and intercell interference coordination in heterogeneous networks is written. Initially the need for deploying heterogeneous networks and elements in a typical heterogeneous network are discussed. Deployment of heterogeneous networks introduces a few challenges. In this report two of the key challenges handover and interference are addressed. Handover process with respect to 3GPPLTE is explained. The effect of a few parameters on handover like TTT and techniques like range expansion are also discussed. Intercell interference coordination and an algorithm for eICIC implementation in 3GPP LTE is explained. The effects of range expansion with eICIC on handover failures and ping-pong rates are discussed. A mobility based eICIC technique is discussed and hence the need for mobility state estimation techniques and algorithms in heterogeneous networks is emphasised for effective implementation of mobility based eICIC schemes.