Nokia Telecommunications Oy

Nokia Corporation

Nokia Networks Oy

Tomi Vaara

Risto Matti Aalto

Serge Haumont

Ahti Muhonen

Timo Halonen

Joni Lehtinen

A method for smoothing measurement results is presented, in which a parameter is calculated, using weight factors, from a number of measurement results in a sample. The parameter is a measure of the center of the sample and has a breaking point different from zero. Using this method, neither an increased number of measurements nor the removal of outliers are required when the reliability of individual measurement results is questionable due to interference, such as momentary burst noise.

Robust and efficient method for smoothing measurement results

A method for selecting a cell for a mobile station (MS) in a cellular telecommunications network, wherein the mobile station (MS) sends a radio station controller (BSC) measurement reports ( - ) comprising information ( ) about the mobile station's serving cell and its neighbour cells. The mobile station or its subscriber is associated with at least one set of special cells called LSA cells. Information on the set of special cells is transferred to the radio station controller (BSC), and the mobile station (MS) at least participates in the transferring of information, preferably by sending an explicit list of its LSA cells or by including in at least one measurement report ( - ) a flag bit ( ) indicating whether or not the cell in question is a special cell.

Cell selection in a radio network

An handover method and a call setup method in a mobile communication system. A cell to be assigned to the mobile station (MS) is selected on the basis of the measurement results and the special cell list. The selected cell is set as the target cell of the handover for the mobile station. The traffic channel for the mobile station (MS) is assigned from the base station of the selected cell.

Handover and call setup in a mobile communication system

The present invention relates to a method and an arrangement for determining a hot spot of telephone traffic in a cell. The invention uses simultaneously two basic measurements of digital radio systems; timing advance and adjacent cell measurement. Timing advance informs the distance of the mobile station from the base station but not the direction. On the basis of the measured signal strengths of adjacent cells it is possible to determine a set of possible locations of the mobile station when there is information about the coverage area of individual adjacent cells. When these measurements are used simultaneously, they exclude the inaccuracies of each other and enable very accurate location determination for monitoring traffic distribution. Timing advance is utilized to determine a set of circular, base-station-centric areas and adjacent cell measurements are utilized to determine the direction of the mobile station to the base

Traffic hot spot locating method

The invention relates to a method and arrangement for making a handover decision in a mobile communication system of multilayer radio coverage, which comprises measuring at a mobile station (MS) a radio signal transmitted by a base station (BTS) of a microcell, and reporting the measurement results at substantially regular intervals. The invention is characterized by determining a relative speed for the mobile station on the basis of the number and classification of the measurement results received at substantially regular intervals. Mobile stations moving at a speed slower than the relative speed are defined as slow moving and commanded to register in the base station of a suitable microcell (A, B, C).

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Espoo, Finland

Tomi Vaara