Patent ID: 11968731
Assignee: FUJITSU LIMITED
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A wireless communication apparatus that is used as a first wireless communication apparatus in a wireless communication system that includes the first wireless communication apparatus, a second wireless communication apparatus that operates in an idle mode, and a third wireless communication apparatus that operates in the idle mode or a connection mode, the wireless communication apparatus comprising:
a communication circuit configured to perform, via a second communication channel, wireless communication with the second wireless communication apparatus and the third wireless communication apparatus which perform communication directly with each other via a first communication channel that is a Device-to Device (D2D) communication channel, the second communication channel being a cellular communication channel connected to a network of the wireless communication system via the first communication apparatus, wherein the second wireless communication apparatus maintains an idle mode via the second communication channel when not in a connected mode via the second communication channel during a period of wireless communication with the third wireless communication apparatus via the first communication channel; and
a control circuit configured to perform first processing when a line disconnection is detected after a first state continues for a predetermined time, the first state being a state where a quality of the first communication channel is poorer than a prescribed quality in a case where the second wireless communication apparatus operates in the idle mode via the second communication channel during the period the second wireless communication apparatus performs communication with the third wireless communication apparatus via the first communication channel, the first processing including establishing the second communication channel with the first wireless communication apparatus.