Radio communication system and communication method

Abstract

A base station for supporting a plurality of radio access schemes is provided. The base station includes a radio transceiver, a storage section and a response sending section. The storage section stores at least one radio access scheme supported by the base station. The at least one radio access scheme includes a predetermined radio access scheme which is common with another base station. The response sending section sends a response to an initial connection received from a mobile station back to the mobile station. The initial connection is received in the predetermined radio access scheme. The response includes information indicating one of said at least one radio access scheme which is used to communicate with the mobile station.

What is claimed is: 
     
         1 . A base station in a radio communication system supporting a plurality of radio access schemes,
 a radio transceiver;   a storage section storing at least one radio access scheme supported in the base station, wherein said at least one radio access scheme includes a predetermined radio access scheme which is common with another base station; and   a response sending section for sending a response to an initial connection received from a mobile station back to the mobile station, wherein the initial connection is received in the predetermined radio access scheme, wherein the response includes information indicating one of said at least one radio access scheme which is used to communicate with the mobile station.   
     
     
         2 . The base station according to  claim 1 , wherein the mobile station makes the initial connection before handover from another base station to the base station. 
     
     
         3 . The base station according to  claim 1 , wherein the base station employs a certain radio transmission system on which said at least one radio access scheme is implemented. 
     
     
         4 . The base station according to  claim 1 , wherein the base station is included in those base stations which are located in a predetermined area on a certain radio transmission system, those base stations which use a same frequency band in a certain radio transmission system, or all the base stations in a certain radio transmission system. 
     
     
         5 . A computer readable storage device storing a computer program instructing a program-controlled processor of a base station in a radio communication system supporting a plurality of radio access schemes, the computer program, when executed by the program-controlled processor, causes the program-controlled processor to execute a method comprising:
 storing at least one radio access scheme supported in the base station in a storage section, wherein said at least one radio access scheme includes a predetermined radio access scheme which is common with another base station; and   sending a response to an initial connection received from a mobile station back to the mobile station, wherein the initial connection is received in the predetermined radio access scheme, wherein the response includes information indicating one of said at least one radio access scheme which is used to communicate with the mobile station.