Patent ID: 6721566
Filing Date: 2004-04-13
Classification: H04W

Abstract:
A method of performing a cell update procedure for a station in a cellular communications system, the cellular communication comprising a plurality of cells, and a first and a second network controllers, said station initially being on a first cell controlled by the first controller and then a second cell controlled by the second controller, the method comprising the steps of:sending, when the station is in the second cell of the system, cell update information together with other information from the station to the second controller; storing the received other information at the second controller; sending from the second controller to the first controller a message indicating that cell update information has been received at the second controller from the station; determining whether or not the first controller functions are to be relocated to the second controller; and if the functions are not to be relocated to said second controller, sending the stored other information to the said first controller via an interface between the first and second controllers.