Yoshino H.,Softbank Mobile Corporation
IEICE Transactions on Communications | Year: 2012
Cognitive radio is an emerging technology to further improve the efficiency of spectrum use. Due to the nature of the technology, it has many facets, including its enabling technologies, its implementation issues and its regulatory implications. In ITU-R (International Telecommunications Union\-Radiocommunication sector), cognitive radio systems are currently being studied so that ITU-R can have a clear picture on this new technology and its potential regulatory implications, from a viewpoint of global spectrum management. This paper introduces the recent results of the ITU-R studies on cognitive radio on both regulatory and technical aspects. This paper represents a personal opinion of the author, but not an official view of the ITU-R. © 2012 The Institute of Electronics, Information and Communication Engineers.
SoftBank Mobile Corporation | Date: 2015-02-16
It is left to a communication terminal side to judge whether to switch communication, and appropriate switching is not performed if a communication terminal does not have a function to switch communication based on the quality of communication. A communication apparatus comprises: a data signal transmitting unit that transmits a data signal to a communication terminal; a control signal transmitting unit that transmits a control signal for establishing communication with the communication terminal; and an area control unit that restricts, to a partial area within a communication possible area that a radio wave including the data signal can reach, a communication establishment possible area that a radio wave including the control signal can reach.
SOFTBANK MOBILE Corporation | Date: 2013-09-06
Telecommunications apparatus for femtocell base station; Cellular phones; Digital cellular phones; Hands free kits for phones; Internet phones; Video phones; Tablet computers; Computers and computer hardware and computer peripherals; Personal computers; Personal digital assistant computers.
SOFTBANK MOBILE Corporation | Date: 2013-08-16
Telecommunication apparatus for femtocell base station; Cellular phones; Digital cellular phones; Hands free kits for phones; Internet phones; Video phones; Tablet computers; Computers and computer hardware and computer peripherals; Personal computers; Personal digital assistant computers.
SOFTBANK MOBILE Corporation | Date: 2013-04-09
The terminal according to the present application has a connection unit that connects to an access point for a communication network The terminal also has a connection control unit that scans a network registered in a connection list, subtracts access points registered in a exclusion list from the detected access points to identify access points to which connection is possible, initializes the exclusion list if an access point to which connection is possible is not identified and then again identifies an access point to which connection is possible, and selects an access point to connect to, out of identified access points to which connection in possible. The terminal further has a connection ending unit that, if the start of a connection to an access point registered in a duplicate exclusion list is detected, cuts the connection with the access point, and also deletes the corresponding network from the connection list.