A method performed by a user equipment, UE, to perform a relocation of the UE from a source macro base station, MBS, to a target femto base station, FBS,, comprising: determining whether there are possible femto base stations for the relocation of the UE based on the white list; identifying a femto base station as the target FBS when it is determined that there are possible femto base stations for the relocation; determining whether the relocation to the target FBS is allowable after identifying the target FBS; and reporting the long identity of the target FBS to the source MBS when it is determined that the relocation to the target FBS is allowable; receiving a command from the source MBS; relocating so that the UE is handed over from the source MBS to the target FBS when the command from the source MBS is to relocate the UE, wherein the white list includes information on one or more femto base stations available to provide connectivity to the UE including a short identity and a long identity for each of the one or more femto base stations, wherein the long identity uniquely identifies each femto base station and the short identity non-uniquely identifies each femto base station, and wherein in the act of detecting the target FBS, the target FBS is detected based on the short and the long identities of the target FBS, wherein identifying a femto base station as the target FBS and determining whether the relocation to the target FBS is allowable comprise requesting the source MBS for a short gap; receiving a grant of the short gap from the source MBS; reading the short identity of the detected femto base station during the short gap after receiving the grant of the short gap; and determining whether the read short identity is in the white list and determining that the relocation is possible when the short identity is in the white list and not possible otherwise, wherein the short gap is a time slot in which the source MBS will not transmit data to the UE to allow the UE to read the short identity transmitted by the detected femto base station. determining whether there are possible femto base stations for the relocation of the UE based on the white list; identifying a femto base station as the target FBS when it is determined that there are possible femto base stations for the relocation; determining whether the relocation to the target FBS is allowable after identifying the target FBS; and reporting the long identity of the target FBS to the source MBS when it is determined that the relocation to the target FBS is allowable; receiving a command from the source MBS; relocating so that the UE is handed over from the source MBS to the target FBS when the command from the source MBS is to relocate the UE, wherein the white list includes information on one or more femto base stations available to provide connectivity to the UE including a short identity and a long identity for each of the one or more femto base stations, wherein the long identity uniquely identifies each femto base station and the short identity non-uniquely identifies each femto base station, and wherein in the act of detecting the target FBS, the target FBS is detected based on the short and the long identities of the target FBS, wherein identifying a femto base station as the target FBS and determining whether the relocation to the target FBS is allowable comprise requesting the source MBS for a short gap; receiving a grant of the short gap from the source MBS; reading the short identity of the detected femto base station during the short gap after receiving the grant of the short gap; and determining whether the read short identity is in the white list and determining that the relocation is possible when the short identity is in the white list and not possible otherwise, wherein the short gap is a time slot in which the source MBS will not transmit data to the UE to allow the UE to read the short identity transmitted by the detected femto base station.