A method of neighbor relation management in a wireless broadband network, the method being performed by a Serving Base Station, SBS, and comprising: dynamically selecting a set of signal measurement reports from a plurality of signal measurement reports received within a predefined time interval from a plurality of user equipments, UEs, associated with the SBS, each signal measuring report including a level of a signal received by corresponding one of said plurality of UEs from a corresponding Neighboring Base Station, NBS (104, 106, 108, 110, 112, 114, 116, 118, 120) among a plurality of NBSs, wherein said plurality of NBSs includes a plurality of configured NBSs comprised in a Neighboring Relation Table, NRT, within the SBS and at least one new NBS which is not comprised in the NRT, and wherein the step of dynamically selecting is based on at least one of: a location of origin of each of the plurality of signal measurement reports, and a comparison of the signal level of each of the plurality of signal measurement reports with respect to an average signal level associated with the plurality of signal measurement reports; sampling (404; 506) the dynamically selected set of signal measurement reports for a predefined sampling period to obtain sampled signal level values of the plurality of configured NBSs (104, 106, 108, 110, 112), and to obtain, for the at least one new NBS (114, 116, 118, 120) sampled signal level values which are greater than a predefined threshold; computing based on the sampled signal level values, a signal level time gradient for each of the plurality of configured NBSs and for each of the at least one new NBS, wherein for each of said NBSs the signal level time gradient is computed using a regression technique based on a relationship modelled by the SBS between the measured signal level value associated with the NBS and a time at which the signal level value is measured; and computing (406; 510) a retention factor for each of the plurality of configured NBSs (104, 106, 108, 110, 112) and for each of the at least one new NBS (114, 116, 118, 120) based on the respective computed signal level time gradient, wherein for each of said NBSs the retention factor of a NBS is a value that represents an ability of the NBS to become a target NBS for handover of a User Equipment, UE, from said SBS. dynamically selecting a set of signal measurement reports from a plurality of signal measurement reports received within a predefined time interval from a plurality of user equipments, UEs, associated with the SBS, each signal measuring report including a level of a signal received by corresponding one of said plurality of UEs from a corresponding Neighboring Base Station, NBS (104, 106, 108, 110, 112, 114, 116, 118, 120) among a plurality of NBSs, wherein said plurality of NBSs includes a plurality of configured NBSs comprised in a Neighboring Relation Table, NRT, within the SBS and at least one new NBS which is not comprised in the NRT, and wherein the step of dynamically selecting is based on at least one of: a location of origin of each of the plurality of signal measurement reports, and a comparison of the signal level of each of the plurality of signal measurement reports with respect to an average signal level associated with the plurality of signal measurement reports; sampling (404; 506) the dynamically selected set of signal measurement reports for a predefined sampling period to obtain sampled signal level values of the plurality of configured NBSs (104, 106, 108, 110, 112), and to obtain, for the at least one new NBS (114, 116, 118, 120) sampled signal level values which are greater than a predefined threshold; computing based on the sampled signal level values, a signal level time gradient for each of the plurality of configured NBSs and for each of the at least one new NBS, wherein for each of said NBSs the signal level time gradient is computed using a regression technique based on a relationship modelled by the SBS between the measured signal level value associated with the NBS and a time at which the signal level value is measured; and computing (406; 510) a retention factor for each of the plurality of configured NBSs (104, 106, 108, 110, 112) and for each of the at least one new NBS (114, 116, 118, 120) based on the respective computed signal level time gradient, wherein for each of said NBSs the retention factor of a NBS is a value that represents an ability of the NBS to become a target NBS for handover of a User Equipment, UE, from said SBS.