Cell selection and reselection in a multiple modulation cellular radio system
AssigneeNokia Mobile Phones Ltd.
InventorsMatti Jokimies, Markus Hakaste
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Abstract
A cellular system comprises base stations and terminals. A certain first base station (105) supports only a certain first modulation method (301) and a certain second base station (104) supports both the first modulation method (301) and a certain second modulation method (302). In order to perform cell reselection there is communicated information to the terminal (101) about which modulation method those base station support, the cells of which are possible new cells for the terminal. A new cell is selected by utilizing the information about which modulation methods the base station support.
Claims20
A method for providing information related to the selection of cells to a terminal in a cellular radio system which comprises base stations and terminals in which:
- the coverage area of each base station constitutes a cell and
- a certain first base station supports only a certain first modulation method and a certain second base station supports both the first modulation method and at least one other modulation method,
- the method according to the invention comprising the step of notifying through at least one broadcast message the terminal of which modulation methods are supported by the base stations of those cells which the terminal is able to select in its current location.
A base station of a cellular system, comprising:
- means for broadcasting general control information to terminals in the base station's cell, and
- means for including information about which modulation methods are supported by the base station in the general control information broadcast to the terminals.
A cellular system terminal comprising:
- means for receiving broadcast information from a base station,
- means for generating and processing comparison information representing several base stations in selecting a cell, and
- means for including received broadcast information about which modulation methods the base stations support in the generation of said comparison information.
Dependencies are inferred from the claim text.