Method and apparatus for assigning codes
AssigneeMitsubishi Denki Kabushiki
InventorKeijiro Take
Life of this patent
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Abstract
A base station controller selects codes corresponding to rate information included in a new starting call message from a mobile station, and further selects codes assignable to the mobile station out of the selected codes as candidate codes. Then, the base station controller detects codes which meet both the characteristics of being at upper level of the candidate codes in the tree structure and being assignable to other mobile station, and further detects levels of the detected codes. Detected levels for all the candidate codes are compared to find a candidate code whose level is the lowest and to assign the candidate code to the mobile station sending the new starting call message.
Claims2
A base station controlling apparatus used for a radio communication system including a plurality of base stations and a plurality of mobile stations, employing CDMA (Code Division Multiple Access) for radio access and providing multi-rate transmission, the base station controlling apparatus comprising a code switch informing unit for informing one of the plurality of mobile stations through one of the plurality of base stations, that a first code, having been used by the one of the plurality of mobile stations, is to be switched to a second code, and requesting the one of the plurality of base stations to transmit timing information regarding timing of switching the first code to the second code to the one of the plurality of mobile stations so that the one of the mobile stations and the one of the plurality of base stations switch transmission code from the first code to the second code.
A radio communication method of a base station controlling apparatus used for a radio communication system including a plurality of base stations and a plurality of mobile stations, employing CDMA (Code Division Multiple Access) for radio access and providing multi-rate transmission, the radio communication method comprising:
- informing one of the plurality of mobile stations through one of the plurality of base stations, that a first code, having been used by the one of the plurality of mobile stations, is to be switched to a second code, and
- requesting the one of the plurality of base stations to transmit timing information regarding timing of switching the first code to the second code to the one of the plurality of mobile stations so that the one of the mobile stations and the one of the plurality of base stations switch transmission code from the first code to the second code.
Dependencies are inferred from the claim text.