Fujitsu Corporation

Makoto Inami

Eiichiro Takahashi

Tomohiro Ishihara

Katsumasa Sugiyama

Kazutoshi Motohashi

Tetsu Sugaya

A wireless terminal device includes a wireless interface part having an interface with a wireless transmission path at a physical layer, a link forming part accessing the wireless transmission path via the wireless interface unit and forming a particular link on the wireless transmission path, and a transmission/reception part transmitting and/or receiving transmission information via the particular link formed by the link forming part. The wireless transmission path is formed as a physical channel to which a CSMA system is applied. The CSMA system secures a given transmission quality with respect to a total of the number of links concurrently formable and the amount of the transmission information. The link forming part forms the particular link on the wireless transmission path when initiated.

Wireless terminal device and node device

An apparatus and a method for selecting an access router's protocol from a plurality of protocols in a communication system including first and second access routers for transferring a packet between the access routers according to the selected protocol. The packet is originated/terminated by users having a user address assigned and accommodated in the respective access routers. Storage is provided in the apparatus for storing a protocol type of the access router corresponding to the user address. The first access router issues a protocol request signal including the user address. The apparatus receives the protocol request signal and referring to the storage, responds to the signal with the protocol type of the second access router accommodating the user having the user address included in the request signal. The first access router, selects a protocol common to the first and second access routers to transfer the packet based on the response.

Growing community of inventors

Kawasaki, Japan

Makoto Inami