Masprodenkoh Kabushikikaisha

Denso Corporation

Hirotaka Naruse

Shinsuke Noiri

Minoru Okada

Masahiro Kuwabara

A disclosed wireless communication device includes an antenna for communication, a transmission unit, a reception unit, a transmission/reception switchover unit, a communication control unit, a diagnosis start determination unit, a loopback path forming unit, a reception level determination unit, a reception duration determination unit, and a fault assertion unit. When a loopback path, which inputs a transmission signal outputted from the transmission unit into the reception unit, is formed by the loopback path forming unit, the reception level determination unit detects a signal level of a reception signal received by the reception unit, and determines whether or not the signal level is normal. The reception duration determination unit measures a reception duration of the reception signal in the reception unit, and determines whether or not the reception duration has exceeded a threshold value for abnormality determination.

Wireless communication device using a loopback path for fault diagnosis

A cable modem of a CATV system includes a proxy requesting unit. The proxy requesting unit requests a set top box to send relevant information about the set top box when the cable modem is requested to send the relevant information from at least one management device connected to the cable modem via a CATV network.

CATV system, management device, cable modem, set-top box and program

A cable modem of a CATV system includes an address monitoring unit and a proxy requesting unit. The address monitoring unit monitors an address of at least one set top box connected to the cable modem based on a content of transmission sent to the cable modem from the set top box. The proxy requesting unit requests for sending relevant information about the set top box to an address indicated by monitoring result of the address monitoring unit, when the proxy requesting unit is requested for sending the relevant information by at least one management device connected to the cable modem via a CATV network.

Growing community of inventors

Nisshin, Japan

Hirotaka Naruse