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

Claim 0:
1. A wireless communication apparatus that is used as a second wireless communication apparatus in a wireless communication system that includes a first wireless communication apparatus and a plurality of the second wireless communication apparatuses, the wireless communication apparatus comprising:
a communication circuit configured to perform at least any one of wireless communication via a first communication channel that is a Device-to Device (D2D) communication channel directly between the wireless communication apparatus and one other second wireless communication apparatus, and wireless communication via a second communication channel between the wireless communication apparatus and the first wireless communication apparatus, 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 wireless communication apparatus maintains an idle mode with the second communication channel when not in a connected mode via the second communication channel during a period of wireless communication 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 wireless communication apparatus operates in the idle mode via the second communication channel during the period the wireless communication apparatus performs communication with the one other second wireless communication apparatus via the first communication channel, the first processing including establishing the second communication channel with the first wireless communication apparatus.