Patent ID: 8244257

Claim:
A method for use in a cellular telephony network, said network comprising: a first number of cells of a first kind, each of which is able to accommodate at least a first number of user terminals, with each cell, of the first number of cells, being controlled by a corresponding base station, a second number of cells of a second kind, each of which is able to accommodate at least a second number of user terminals, with each cell, of the second number of cells, being controlled by a corresponding base station, said second kind of cells being significantly much smaller than said first kind of cells and being located in or adjacent to a cell of the first kind, the network also comprising: control functions for control of the corresponding base stations for the first number of cells and the second number of cells, and hand over functions for handing over control of user terminals from one base station to another base station, the method being intended for use when an ongoing call of a user terminal in a cell of the second kind, being served by an original base station, is handed over to a base station of a cell of the first kind, the method comprising: letting said control function for the base station of the cell of the second kind send identifying information to the control function of the base station of the first kind, which identifying information is such that if the call is to be handed back to the original base station of the cell of the second kind, the original base station can be identified and found by the network; and handing the call back to the originating base station using the identifying information.