Patent ID: 8606291

Claim:
A method for determining in a wireless cellular telecommunication network which device among a first device managing data associated to mobile terminals located in a first pool of cells and a second device managing data associated to mobile terminals located in a second pool of cells has to manage data associated to a mobile terminal, the second pool of cells being composed of cells which do not belong to the first pool of cells and of cells shared by both the first and second pool of cells, the first pool of cells being composed of cells which do not belong to the second pool of cells and of the cells shared by both the first and second pool of cells, the mobile terminal being located in the first pool of cells and the first device managing data associated to the mobile terminal, the method comprising the steps, executed by the first device managing data associated to the mobile terminal, of: transferring a first list to the mobile device, the first list specifying at least one group of cells assigned to the mobile terminal; receiving a first message from the mobile terminal when the mobile terminal is located in a cell of the first pool of cells not included in the first list, the first message including a second list of at least one group of cells the mobile terminal moved through, determining if the cell in which the mobile terminal is located belongs to the second pool of cells, and if the cell, in which the mobile terminal is located, belongs to the second pool of cells: determining if the mobile terminal is going to leave the first pool of cells and/or will not leave the second pool of cells, from the second list of at least one group of cells the mobile terminal moved through and from the cell in which the mobile terminal is located, and transferring a second message to the second device managing data associated to mobile terminals located in the second pool of cells requesting the second device to manage data associated to the mobile terminal if the mobile terminal is going to leave the first pool of cells and/or will not leave the second pool of cells, and updating the first list to include the cell in which the mobile terminal is located.