Cellular mobile radio system comprising sub-cells
First Claim
1. A method of assigning a mobile station to a sub-cell in a cellular mobile radio system which comprises a plurality of radio cells which can be subdivided into sub-cells, each of said radio cells having a fixed base station to which a set of radio channels is allocated and which can be assigned by the base station to establish sub-cells of said cell, said method comprising steps of:
- (i) measuring radio transmission parameters applicable to radio communication between the mobile station and the base station of each of a plurality of said cells that is adjacent to the one of said cells in which the mobile station is presently positioned;
(ii) forming, from said parameters, a position vector applicable to the respective sub-cells, said position vector being representative of a transmission quality between the base station of each of the adjacent cells and the mobile station, respectively;
(iii) based on the applicable position vector, selecting a sub-cell of said one of said cells to which the mobile station should be assigned in order to minimize interference by adjacent radio cells with radio transmission between the mobile station and the base station of the cell in which the mobile station is presently located; and
(iv) assigning the mobile station to the selected sub-cell.
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Accused Products
Abstract
A cellular mobile radio systems includes fixed stations and mobile stations, a radio cell being subdivided into sub-cells and each sub-cell being assigned its own allocation of radio channels. The values of radio parameters of the fixed stations are measured and evaluated for assigning a mobile station to a sub-cell. To achieve an additional increase of the radio channel capacity of such system, a position vector is assigned to each respective mobile station which is derived from the measured parameters. A mobile station is then assigned to a specific sub-cell on the basis of its position vector.
13 Citations
13 Claims
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1. A method of assigning a mobile station to a sub-cell in a cellular mobile radio system which comprises a plurality of radio cells which can be subdivided into sub-cells, each of said radio cells having a fixed base station to which a set of radio channels is allocated and which can be assigned by the base station to establish sub-cells of said cell, said method comprising steps of:
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(i) measuring radio transmission parameters applicable to radio communication between the mobile station and the base station of each of a plurality of said cells that is adjacent to the one of said cells in which the mobile station is presently positioned; (ii) forming, from said parameters, a position vector applicable to the respective sub-cells, said position vector being representative of a transmission quality between the base station of each of the adjacent cells and the mobile station, respectively; (iii) based on the applicable position vector, selecting a sub-cell of said one of said cells to which the mobile station should be assigned in order to minimize interference by adjacent radio cells with radio transmission between the mobile station and the base station of the cell in which the mobile station is presently located; and (iv) assigning the mobile station to the selected sub-cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification