Method and apparatus for assigning codes
AssigneeMitsubishi Denki Kabushiki Kaisha
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 used for a radio communication system employing CDMA (Code Division Multiple Access) for radio access with a plurality of mobile stations and providing multi-rate transmission, the base station comprising a switching unit for switching transmission code from a first code to a second based on timing information transmitted to one of the plurality of mobile stations for switching the first code to the second code,
- wherein the timing information is used for switching the first code to the second code at the one of the plurality of mobile stations.
A radio communication method of base station used for a radio communication system employing CDMA (Code Division Multiple Access) for radio access with a plurality of mobile stations and providing multi-rate transmission, the radio communication method comprising:
- switching transmission code from a first code to a second based on timing information transmitted to one of the plurality of mobile stations for switching the first code to the, second code,
- wherein the timing information is used for switching the first code to the second code at the one of the plurality of mobile stations.
Dependencies are inferred from the claim text.