Scramble code allocation method, a radio base station, a mobile station, and a mobile communications system

Abstract

A scramble code allocation method used by mobile communications systems, and a base station and a mobile station that use the method are disclosed. The scramble code allocation method autonomously and optimally sets up a scramble code unique to a target base station. The method includes a step of generating a collection packet for collecting unique information of surrounding base stations, the unique information being used for setting up respective identifiers of the surrounding base stations; a step of broadcasting the collection packet to the surrounding base stations through a network; a step of receiving response packets from the surrounding base stations in response to the collection packet; a step of extracting the unique information of the surrounding base stations inserted in the response packets that are received; a step of storing the extracted unique information; and a step of setting up an identifier of the target base station based on the stored unique information.

1 . A mobile station of a wireless mobile communications system that includes the mobile station, a plurality of base stations, and a network that connects the base stations, wherein the mobile station that communicates with the base stations discriminates the base stations by identifiers uniquely assigned to each of the base stations, the mobile station comprising:
 a packet control unit configured to extract unique information used in setting up an identifier of the base stations that surround the base station with which the mobile station is currently communicating, the unique information being extracted from a packet received from the base station with which the mobile station is currently communicating; and   an information updating unit configured to store the extracted unique information such that the unique information is updated;   wherein the packet control unit provides the stored unique information to the base station with which the mobile station is currently communicating.   
   
   
       2 . The mobile station as claimed in  claim 1 , further comprising:
 a communication situation surveillance unit configured to supervise quality of communications with the base station with which the mobile station is currently communicating, and to provide the base station with information reporting that the quality of communications with the base station does not fulfill a predetermined value.   
   
   
       3 . A mobile communication system, comprising:
 a plurality of base stations;   a plurality of mobile stations; and   a network that connects the base stations; wherein the mobile stations that communicate with the base stations discriminate base stations by identifiers uniquely assigned to the base stations, each mobile station including   a packet control unit configured to extract unique information used in setting up an identifier of the base stations that surround a target base station, the unique information being extracted from a packet received from the target base station; and   an information updating unit configured to store the unique information extracted by the packet control unit, the stored unique information being transmitted to the target base station by the packet control unit;   the target base station including   a packet transceiver unit configured to transmit and receive a packet for collecting the unique information used for setting up the identifier of the base stations that surround the target base station;   a packet information extraction unit configured to extract the unique information of the surrounding base stations inserted in the packet that is received; and   a scramble code setting unit configured to set up the identifier of the target base station based on the unique information that is extracted by the packet information extracting unit.