1. A computerized method of optimizing neighbor relation tables (NRTs) of access points in a cellular network comprising a plurality of access points (APs), the method comprising: a) obtaining, by a computer, initial handover-related estimations for AP pairs each constituted by a given source AP and its neighbouring APs located in a predefined range and thereby considered as candidates for an NRT of the given sourceAP; b) generating, by the computer, a handover (HO) prediction model; c) using the generated HO prediction model to assess, by the computer, HO-related counts for each AP pair of the AP pairs; d) using the assessed HO counts to generate, by the computer, data to be used for NRT optimization; and e) enabling, by the computer, modifying candidates in at least one NRT in accordance with the generated data, thereby optimizing the at least one NRT.