Abstract: A management device including an acquirer configured to acquire response information indicating whether a call-destination terminal has accepted participation in group communication, and terminal operation information indicating whether the call-destination terminal is in a state capable of receiving the group communication, a processor configured to create communication result information including participation information on the call-destination terminal whether to participate in the group communication, and a transmitter configured to transmit the communication result information, wherein, in a case of non-participation where the call-destination terminal has not participated in the group communication, the processor is configured to create the participation information that makes it possible to identify at least two factors of the non-participation.

Abstract: Provided is a management device including an acquirer configured to acquire base station information indicating an operational status of a base station device in group communication and terminal device operational information indicating whether a call-destination terminal device registered in the base station device is capable of receiving the group communication, a processor configured to create communication result information in which information that identifies the base station device, information that identifies the call-destination terminal device, and participation information on the call-destination terminal device whether to participate in the group communication are associated with one another, and a transmitter configured to transmit the communication result information, wherein the processor is configured to create the participation information to identify a state of participation and a state of non-participation due to a factor on a call-destination terminal device side and a state of non-partici

Abstract: Provided is a management device including an acquirer configured to acquire base station information indicating an operational status of a base station device in group communication and terminal device operational information indicating whether a call-destination terminal device registered in the base station device is capable of receiving the group communication, a processor configured to create communication result information in which information that identifies the base station device, information that identifies the call-destination terminal device, and participation information on the call-destination terminal device whether to participate in the group communication are associated with one another, and a transmitter configured to transmit the communication result information, wherein the processor is configured to create the participation information to identify a state of participation and a state of non-participation due to a factor on a call-destination terminal device side and a state of non-partici

Abstract: A management device including an acquirer configured to acquire response information indicating whether a call-destination terminal has accepted participation in group communication, and terminal operation information indicating whether the call-destination terminal is in a state capable of receiving the group communication, a processor configured to create communication result information including participation information on the call-destination terminal whether to participate in the group communication, and a transmitter configured to transmit the communication result information, wherein, in a case of non-participation where the call-destination terminal has not participated in the group communication, the processor is configured to create the participation information that makes it possible to identify at least two factors of the non-participation.

Abstract: A transmission unit transmits, to a base station apparatus, a first signal including prerequisite information for performing communication. The transmission unit also includes an inquiry request regarding the status of another terminal apparatus in the first signal. A receiving unit receives, from a base station apparatus, a second signal including a response to the information included in the first signal transmitted from the transmission unit. The receiving unit also receives a response to the inquiry request included in the first signal transmitted from the transmission unit.