Abstract: According to one aspect, a communication apparatus is provided which is on a LAN and coupled to a server via an external network involving a NAT traversal with a router of the LAN. The communication apparatus is configured to determine a configuration of the router of the LAN; and request the server to transmit a NAT update request packet to the router, which is registered in the server and performs the NAT traversal, when it is determined that the configuration of the router of the LAN is in two or more stages.

Abstract: According to one aspect, a communication apparatus is provided which is on a LAN and coupled to a server via an external network involving a NAT traversal with a router of the LAN. The communication apparatus is configured to determine a configuration of the router of the LAN; and request the server to transmit a NAT update request packet to the router, which is registered in the server and performs the NAT traversal, when it is determined that the configuration of the router of the LAN is in two or more stages.

Abstract: A wireless communication system includes: a first wireless communication terminal to register an external device, wherein a subscriber information management device transmits a location of the external device to the first wireless communication terminal based on a search result of the external device based on a search request for the external device, the search request being transmitted from the subscriber information management device to a second wireless communication terminal within a search target area, the second wireless communication terminal being identified by the subscriber information management device based on registration information including certain information and location information of the external device.

Abstract: A wireless communication system includes: a first wireless communication terminal to register an external device, wherein a subscriber information management device transmits a location of the external device to the first wireless communication terminal based on a search result of the external device based on a search request for the external device, the search request being transmitted from the subscriber information management device to a second wireless communication terminal within a search target area, the second wireless communication terminal being identified by the subscriber information management device based on registration information including certain information and location information of the external device.

Abstract: A communication terminal which sends a frame to another terminal when performing a load distribution process using load distribution information appended to a frame that is sent/received between terminals within a communication network, the communication terminal comprises: a communication control part that specifies a sending port used for sending the frame; a load distribution information originating side designation part that stores load distribution structuring information, which is to be appended to the frame and used for generating the load distribution information, by relating to a sending port; a load distribution information transfer processing part that, when the sending port is specified, retrieves the load distribution structuring information corresponding to the determined sending port from the load distribution information originating side designation part; a send information setting part that structures the frame based on the load distribution structuring information and a load distribution inf

Abstract: In the present invention, the communication quality of a communication network that provides a plurality of types of communication services is measured, and the measured communication quality is compared with a preset criterion to determine an abnormality type and whether or not management is necessary. When a determination is made that management is necessary, information about management is extracted from a database in which information about management with respect to abnormalities is recorded in association with communication network devices constituting the communication network, the service types of communication services and abnormality types, based on a communication network device, service type and abnormality type corresponding to the measured communication quality, and then an output such as a notification and control of the device based on the extracted information is given.

Abstract: A sending probe sends a quality measurement packet to a receiving probe, and increments a sent packet counter every time the quality measurement packet is sent. A receiving probe receives the quality measurement packet from the sending probe, and attaches a received packet counter to the quality measurement packet and returns the quality measurement packet to the sending probe. The sending probe receives a returned quality measurement packet, extracts a received packet count from the quality measurement packet, and calculates a packet loss rate by using a difference between the sent packet counter and the received packet counter and a difference between the received packet counter and the returned packed counter.

Abstract: In the present invention, the communication quality of a communication network that provides a plurality of types of communication services is measured, and the measured communication quality is compared with a preset criterion to determine an abnormality type and whether or not management is necessary. When a determination is made that management is necessary, information about management is extracted from a database in which information about management with respect to abnormalities is recorded in association with communication network devices constituting the communication network, the service types of communication services and abnormality types, based on a communication network device, service type and abnormality type corresponding to the measured communication quality, and then an output such as a notification and control of the device based on the extracted information is given.

Abstract: A communication terminal which sends a frame to another terminal when performing a load distribution process using load distribution information appended to a frame that is sent/received between terminals within a communication network, the communication terminal comprises: a communication control part that specifies a sending port used for sending the frame; a load distribution information originating side designation part that stores load distribution structuring information, which is to be appended to the frame and used for generating the load distribution information, by relating to a sending port; a load distribution information transfer processing part that, when the sending port is specified, retrieves the load distribution structuring information corresponding to the determined sending port from the load distribution information originating side designation part; a send information setting part that structures the frame based on the load distribution structuring information and a load distribution inf