An apparatus including: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: select reference neighbouring cells among a plurality of neighbouring cells of a serving cell, wherein the reference neighboring cells have a same numerology and synchronization signal block burst patterns overlapping in time and with a same periodicity; determine a measurement gap configuration allowing at least one terminal served by the serving cell to measure at least one synchronisation signal block from at least one of the reference neighbouring cells; and provide, to the at least one terminal, the measurement gap configuration.