Patent ID: 9578525
Date: 2017-02-21
CPC Classifications: H04W

Claim:
1. A first base station comprising: a monitoring unit that monitors whether a supply of electrical power to a second base station that forms another communication area that is overlapped with a communication area formed by the first base station is stopped; and a wireless communication unit that sends, when the supply of the electrical power to the second base station is stopped, first key data by using a first channel through which a first communication terminal accommodated in the first base station is capable of receiving the first key data and a second communication terminal accommodated in the second base station is not capable of receiving the first key data and that sends, after sending the first key data, second key data that is the same as the first key data and a transmission regulation notification indicating that call regulation is performed on the first base station by using a second channel through which both the first communication terminal and the second communication terminal are capable of receiving the second key data and the transmission regulation notification, wherein the first communication terminal and the second communication terminal: