Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Toshiyuki Hamasaki

Yasushi Yokomitsu

Noriaki Kido

Masahiro Shigyo

Yuji Mitsunaga

Akio Yao

Hiroshi Konishi

Chikashi Ue

Yuuji Yoshida

Kiminori Washitani

Hideaki Nagao

Kotaro Matsuo

Kazuhiro Koyama

A camera system comprising a camera and a hub connected to the camera, wherein the camera system allows handing over while the hub and a portable terminal device (smart phone) are communicating via a router. This camera system adopts a configuration provided with a DECT camera for transmitting media data that includes audio data and/or video data, and a hub for receiving the media data transmitted from the DECT camera, periodically receiving an IP address notification from a previously correlated smart phone, and transmitting the media data to the transmission source of the latest of the IP address notification.

Camera system and communication method

The present invention provides a repeater which automatically closes a dynamically opened port in accordance with prior setting, the repeater including: a port mapping table where a global IP address and an external port number, or an external port number on the Internet is associated with a local IP address and an internal port number of a terminal connected to a LAN; a control unit which, receiving a communications packet to which an external port number is specified, converts the external port number to an internal port number based on the port mapping table and transfers the internal port number to the LAN; a timer unit which counts the unoccupied time of the port after transferring a communications packet to which an external port number is specified; and a port management unit which checks whether the registered machine is present on the LAN and in case it is absent, deletes registration concerning the external port number from the port mapping table.

Repeater and an inter-network repeating method

Growing community of inventors

Fukuoka, Japan

Toshiyuki Hamasaki