Mobile communication method and server device

A mobile communication method comprising:

• step A of determining to change a manager of a radio base station from a first network device to a second network device;
• step B of transmitting a reset request to the radio base station;
• step C of performing a reset operation by the radio base station in response to the reset request;
• step D of notifying the radio base station of address information of the second network device;
• and
• step E of establishing connection with the second network device by the radio base station using the notified address information of the second network device, wherein
• in the step C, the radio base station gradually lowers transmission power for broadcast information upon receiving the reset request and performs the reset operation after the transmission power for the broadcast information is lowered to a predetermined value if the radio base station is a first radio base station, and
• in the step C, the radio base station performs the reset operation upon receiving the reset request if the radio base station is a second radio base station.