Method for an improved operation of a cellular telecommunications network in an edge region of the radio coverage area of the cellular telecommunications network, wherein the cellular telecommunications network comprises an access network, wherein a user equipment is located in a radio cell of the access network, the radio cell being located in the edge region of the radio coverage area of the cellular telecommunications network and the radio cell being served by a serving base station entity, wherein the user equipment - besides receiving radio signals from the serving base station entity - receives radio signals also from a further base station entity of a further cellular telecommunications network, wherein a specific cell identifier is assigned to the further base station entity, wherein the serving base station entity transmits a blacklist information regarding cell identifiers to the user equipment, the blacklist information referring to cell identifiers for which measurements - to be conducted by the user equipment - of the radio environment at the position of the user equipment are to be avoided, wherein the method comprises the following steps: -- in a first step, a first blacklist information - transmitted to the user equipment - refers at most to other cell identifiers than the specific cell identifier or a first blacklist information is not transmitted to the user equipment, and the user equipment receives - from the further base station entity - an information comprising the specific cell identifier, wherein the specific cell identifier as well as additional information related to the further base station entity are transmitted by the user equipment to the serving base station entity, -- in a second step, subsequent to the first step, a second blacklist information - received by the user equipment - refers at least to the specific cell identifier, and the user equipment, upon reception from the further base station entity of an identifier information comprising the specific cell identifier, avoids transmitting additional information regarding the further base station entity to the serving base station entity and/or avoids a consideration of the further base station entity in the cell-reselection procedure, wherein the first step is terminated and the second step conducted -- after a further predetermined time interval has elapsed, or -- after the serving base station entity having received the additional information regarding the further base station entity from the user equipment and/or from a further user equipment served by the serving base station entity -- a predetermined number of times or -- at a predetermined repetition rate during a further predetermined time interval. -- in a first step, a first blacklist information - transmitted to the user equipment - refers at most to other cell identifiers than the specific cell identifier or a first blacklist information is not transmitted to the user equipment, and the user equipment receives - from the further base station entity - an information comprising the specific cell identifier, wherein the specific cell identifier as well as additional information related to the further base station entity are transmitted by the user equipment to the serving base station entity, -- in a second step, subsequent to the first step, a second blacklist information - received by the user equipment - refers at least to the specific cell identifier, and the user equipment, upon reception from the further base station entity of an identifier information comprising the specific cell identifier, avoids transmitting additional information regarding the further base station entity to the serving base station entity and/or avoids a consideration of the further base station entity in the cell-reselection procedure, wherein the first step is terminated and the second step conducted -- after a further predetermined time interval has elapsed, or -- after the serving base station entity having received the additional information regarding the further base station entity from the user equipment and/or from a further user equipment served by the serving base station entity -- a predetermined number of times or -- at a predetermined repetition rate during a further predetermined time interval. -- a predetermined number of times or -- at a predetermined repetition rate during a further predetermined time interval.