Mobile telephone terminal, base station, communication system, method of adding/changing operations

摘要

Users implement additions/changes of functions of mobile telephone terminal themselves without difficulty and fulfill widely-ranged needs belonging to respective users. A mobile telephone terminal which is provided with a connecting part 106 to be connected to a detachably attachable camera 105 - 1 and executes process corresponding to functions of the camera 105 - 2 by connecting the camera 105 - 2 to the connecting part 106 comprises a communication controlling unit 114 of implementing communication control for transmitting/receiving predetermined information to/from the base station 2 , a connection detecting unit 112 for detecting the camera 105 - 2 connected to the connecting part 106 and generating a detection signal being a signal related to the detection, and a driver requesting unit 115 for requesting a driver for booting the camera 105 - 2 based on the detection signal from the base station 2 and generating request information being information related to the request. The mobile telephone terminal transmits request information to the base station 2 by communication control that the communication controlling unit 114 implements, and receives the requested driver from the base station 2.