Patent ID: 6192244
Filing Date: 2001-02-20
Classification: H04W

Abstract:
A method of analysing lists of neighbouring cells in a cellular telecommunications system comprising a plurality of active mobile stations and a static network, the static network having a first cell and a plurality of cells neighbouring the first cell, some of the neighbouring cells being determined by an operator of the system as planned neighbouring cells, each containing the cells having a base station, wherein:each base station transmits, on a control channel, a signal including a base station identifier of that base station;each mobile station in the first cell is provided with an ordered control channel list of control channel frequencies to be detected by that mobile station; andeach mobile station in said first cell reports messages to the static network indicating the base station identifiers of control channels detected by that mobile station and the position in the control channel list of the respective control channel;the method comprising the steps of:extracting from the static network such reporting messages for said first cell and producing a reporting list including, for each position in the control channel list, the number of times that any of the base station identifiers has been reported for that position;obtaining a planned neighbour list of the control channels and respective base station identifiers of the planned neighbouring cells;correlating the reporting list and the planned neighbour list with respect to the control channels; andanalysing the correlated lists to determine whether any of the control channels is affected by bad frequency planning.