Radio device, state detection method and system

A state detection method in a first base transceiver station for communicating with a mobile station located in a radio propagation area of the first base transceiver station, the state detection method comprising:

• identifying a mobile station located in an area covered with the radio propagation area of the first base transceiver station and a radio propagation area of a second base transceiver station;
• transmitting, from the first base transceiver station, a connection test request signal having information concerned with the second base transceiver station to the identified mobile station;
• detecting a response signal for the connection test request signal from the identified mobile station indicating a result of the identified mobile station executing a test, including connecting with the second base transceiver station, based on the connection test request signal,
• wherein the transmitting the connection test request signal starts a timer when a number of mobile stations in the radio propagation area of the second base transceiver station is 0, and transmits the connection test request signal to the identified mobile station after a specified time has passed.

A state detection system for detecting a state of a second base transceiver station, the state detection system comprising:

• a maintenance and operation system for requesting, to a first base transceiver station, a connection test between a mobile station and the second base transceiver station;
• the first base transceiver station for requesting the connection test of the mobile station located in an area covered with both a radio propagation area of the first base transceiver station and a radio propagation area of the second base transceiver station, the connection test request having information concerned with the second base transceiver station, based on the connection test request from the maintenance and operation system;
• and
• the mobile station for executing and sending the connection test to the second base transceiver station based on the connection test request and the information from the first transceiver station, for detecting a response to the connection test from the second base transceiver station, and for transmitting the response to the first base transceiver station,
• wherein the maintenance and operation system starts a timer when a number of the mobile stations in the radio propagation area of the second base transceiver station is 0, and requests the connection test to the first base transceiver station after a specified time has passed.