Mitsubishi Space Software Co., Ltd.

Electronic Navigation Research Institute

Electronic Navigation Research Institute, an Independent Administrative Institution

Naoki Kanada

Kakuichi Shiomi

Atsushi Yamagishi

Naritomo Meguro

Atsushi Mitsubishi Space Soft Co Ltd Yamagishi

It aims at preferentially dealing with emergency communication etc. by a simple and effective method when emergency communication etc. is initiated. In emergency situation, at a mobile station, a special call partis switched from a normal mode to an emergency mode, and a mobile station side communication parttransmits a radio wave with a transmitted signal of high power (power spectrum density) at the center frequency fof a carrier wave. A base stationreceives the radio wave with the transmitted signal of high power (power spectrum density) at the center frequency fof the carrier wave, from the mobile stationwhich output communication for emergency situation. The base stationoutputs suppression signals for suppressing signal intensity to the other mobile stations. Only the mobile stationwhich transmitted the communication for emergency situation establishes a channel to the base station

Mobile station, mobile station communication control method, base station, and communication system

When emergency communication etc. is sent, it aims at preferentially dealing with the emergency communication etc. by a simple and effective method. It is a communication system in which a base stationand a mobile stationestablish communication for emergency situation, in time of emergency, wherein the mobile stationswitches an output adjustment from the normal mode to the emergency mode and sends the communication for emergency situation at the largest output possible. The base stationreceives a strong radio wave from the mobile stationwhich sent the communication for emergency situation. The base stationcontinues to output suppression signals for suppressing signal intensity to the other mobile stations. The other mobile stations are suppressed by the near-far effect, and it becomes impossible for the base stationto receive communication except for the communication for emergency situation. Only the mobile stationwhich sent the communication for emergency situation establishes a channel to the base stationAfter the establishment, the mobile stationwhich sent the communication for emergency situation performs communication according to the normal communication procedure.

Mobile station and method for controlling mobile station side communication, base station and method for controlling base station side communication, and communication system

Growing community of inventors

Tokyo, Japan

Naoki Kanada