Kddi Corporation

Masaya Shibayama

Takeo Ohseki

Yasuhiro Suegara

Kazuya Moriwaki

A communication apparatus, which is capable of performing, in a predetermined frequency band to be used by a first radio communication system configured to periodically transmit a reference signal with a predetermined frequency spacing, communication using a second radio communication system that is different from the first radio communication system, performs communication of the second radio communication system while the base station apparatus of the first radio communication system operates in a mode in which periodic transmission of the reference signal is stopped for a predetermined period, based on information relating to a timing at which a base station apparatus of the first radio communication system is to operate in the mode.

Communication apparatus, communication method, and computer-readable storage medium for implementing coexistence with legacy system

A communication device, which is capable of performing communication via a second wireless communication system that is different from a first wireless communication system, in a frequency band that is used by the first wireless communication system, the first wireless communication system periodically transmitting a reference signal, transmits, to a base station device of the first wireless communication system, information for operating the base station device in a mode in which the periodical transmission of the reference signal is interrupted for a predetermined period, and performs communication involving a predetermined signal of the second wireless communication system while the base station device of the first wireless communication system is operating in the mode.

Communication device, communication method, and storage medium for implementing coexistence with legacy system

A control device configured to control communication between a terminal and a base station manages, concerning the communication, first information representing a part of a number corresponding to an order of a packet and held by each of the terminal and the base station and second information representing another part of the number corresponding to the order of the packet and transmitted from the terminal to the base station, determines whether the first information matches between the base station and the terminal, and controls the terminal to transmit a signal used to execute reconnection processing for resetting the number of the packet upon determining that the first information does not match between the base station and the terminal.

Growing community of inventors

Tokyo, Japan

Masaya Shibayama