Abstract: A satellite constellation apparatus, a satellite constellation system, a method, and a non-transitory computer-readable medium that can prevent instantaneous interruption of communication are provided. A traffic control ground station is capable of communicating with a plurality of satellites and includes a communication control unit configured to predict a functional link through the plurality of satellites at a time point later than the present time point by a predetermined time based on trajectories of the plurality of satellites and control switching of transmission destinations of communication data transmitted and received by the satellites so that communication is performed by using the predicted functional link before a functional link through the plurality of satellites at the present time point is disconnected at the time point later by the predetermined time.

Abstract: The packet capsulation device 10 includes capsulation means 11 for encapsulating an initial packet in communication between a first terminal and a second terminal serving as a partner terminal by adding a header for capsulation, and for non-encapsulating on reception of an encapsulated packet, storage means 12 for storing data capable of identifying a path of a packet following the initial packet in the wireless communication channel, and non-encapsulated packet transmission means 13 for transmitting the packet following the initial packet to the wireless communication channel without encapsulating, according to the data capable of identifying the path of the packet.

Abstract: A communication device (10) includes a wireless LAN interface (11) that wirelessly communicates with an access point (31), a wireless LAN interface (12) that wirelessly communicates with an access point (32), an encapsulation unit (13) that encapsulates, in accordance with a specified encapsulation protocol, a transmission frame to be transmitted to a communication device (20) at the other side via Layer 2 tunneling, and a redundancy unit (14) that generates a first encapsulated frame where a MAC address of the wireless LAN interface (11) is set to a source MAC address and a second encapsulated frame where a MAC address of the wireless LAN interface (12) is set to a source MAC address by using the encapsulated transmission frame.

Abstract: The packet capsulation device 10 includes capsulation means 11 for encapsulating an initial packet in communication between a first terminal and a second terminal serving as a partner terminal by adding a header for capsulation, and for non-encapsulating on reception of an encapsulated packet, storage means 12 for storing data capable of identifying a path of a packet following the initial packet in the wireless communication channel, and non-encapsulated packet transmission means 13 for transmitting the packet following the initial packet to the wireless communication channel without encapsulating, according to the data capable of identifying the path of the packet.

Abstract: Provided is a communication system in which an administrator can easily perform setting for communication. When having received a new packet, which is a packet for which control information conforming to header information has not been set yet, a packet transfer means 72 notifies a control means 71 of header information of the new packet. The control means 71 holds a list of items that can be specified from an IP address, and sets control information in the packet transfer means 72 on the basis of an item specified from an IP address included in the header information and on the basis of the list, when the header information is notified from the packet transfer means 72.

Abstract: A control means 111 sets, with respect to a packet transfer means 112, control information that defines an operation of the packet transfer means 112 according to header information of a packet. In a case of being set to a learning mode to learn a new record and in a case where an item corresponding to a condition that can be specified from an IP address is designated as an item a condition of which is to be learned, the control means 111 sets, in the packet transfer means 112, control information indicating permission for communication by a new packet when header information of the new packet is notified by the packet transfer means 112. Then, the control means 111 adds, to the list, a record in which a condition specified from an IP address in the header information is described in the designated item.

Abstract: A control means 111 sets, with respect to a packet transfer means 112, control information that defines an operation of the packet transfer means 112 according to header information of a packet. In a case of being set to a learning mode to learn a new record and in a case where an item corresponding to a condition that can be specified from an IP address is designated as an item a condition of which is to be learned, the control means 111 sets, in the packet transfer means 112, control information indicating permission for communication by a new packet when header information of the new packet is notified by the packet transfer means 112. Then, the control means 111 adds, to the list, a record in which a condition specified from an IP address in the header information is described in the designated item.

Abstract: Provided is a communication system in which an administrator can easily perform setting for communication. When having received a new packet, which is a packet for which control information conforming to header information has not been set yet, a packet transfer means 72 notifies a control means 71 of header information of the new packet. The control means 71 holds a list of items that can be specified from an IP address, and sets control information in the packet transfer means 72 on the basis of an item specified from an IP address included in the header information and on the basis of the list, when the header information is notified from the packet transfer means 72.

Abstract: To realize a portable telephone which can always receive the user information via a MBMS service. The portable telephone includes: an antenna for transmitting/receiving radio waves to and from a network; a wireless section for modulating/demodulating radio waves transmitted/received by the antenna; and a control section which has a function of analyzing and processing Layer 3 messages including MBMS related messages demodulated by the wireless section and wherein, upon recognizing that there is user information which has not been received while receiving user information via a MBMS service in the PtM mode, the control section transmits a request to provide the MBMS service in PtP mode to the network via the wireless section.

Abstract: To realize a portable telephone which can always receive the user information via a MBMS service. The portable telephone includes: an antenna for transmitting/receiving radio waves to and from a network; a wireless section for modulating/demodulating radio waves transmitted/received by the antenna; and a control section which has a function of analyzing and processing Layer 3 messages including MBMS related messages demodulated by the wireless section and wherein, upon recognizing that there is user information which has not been received while receiving user information via a MBMS service in the PtM mode, the control section transmits a request to provide the MBMS service in PtP mode to the network via the wireless section.

Abstract: To realize a portable telephone which can always receive the user information via a MBMS service. The portable telephone includes: an antenna for transmitting/receiving radio waves to and from a network; a wireless section for modulating/demodulating radio waves transmitted/received by the antenna; and a control section which has a function of analyzing and processing Layer 3 messages including MBMS related messages demodulated by the wireless section and wherein, upon recognizing that there is user information which has not been received while receiving user information via a MBMS service in the PtM mode, the control section transmits a request to provide the MBMS service in PtP mode to the network via the wireless section.

Abstract: To realize a portable telephone which can always receive the user information via a MBMS service. The portable telephone includes: an antenna for transmitting/receiving radio waves to and from a network; a wireless section for modulating/demodulating radio waves transmitted/received by the antenna; and a control section which has a function of analyzing and processing Layer 3 messages including MBMS related messages demodulated by the wireless section and wherein, upon recognizing that there is user information which has not been received while receiving user information via a MBMS service in the PtM mode, the control section transmits a request to provide the MBMS service in PtP mode to the network via the wireless section.