Abstract: A terminal device includes: a first communicator that carries out short-distance radio communications with a terminal device; a second communicator that carries out long-distance radio communications with the terminal device; a detector that detects an identifier, for identifying the terminal device, from a reception signal received by the first communicator; a determiner that determines signal strength of the reception signal detected by the detector; a storage that stores information relating to the terminal device and the signal strength; a storage controller that exercises such control that the identifier and the signal strength are correlated with each other and stored in the storage as a proximity station list; a setter; and an output controller.

Abstract: There is provided a communication device including a transmission unit that transmits predetermined information to a base station in accordance with a transmission order of its own and a transmission cycle preset in the communication device of its own, a receiving unit that receives, from other communication device, a reception signal and a transmission order preset in the other communication device, and a control unit that extends the transmission cycle of the communication device of its own when the receiving unit receives a specific signal, compares the transmission order of its own with the transmission order of the other communication device to calculate a transmission timing for transmitting the predetermined information to the base station, and controls the transmission unit to transmit the predetermined information to the base station.

Abstract: A terminal device includes: a first communicator that carries out short-distance radio communications with a terminal device; a second communicator that carries out long-distance radio communications with the terminal device; a detector that detects an identifier, for identifying the terminal device, from a reception signal received by the first communicator; a determiner that determines signal strength of the reception signal detected by the detector; a storage that stores information relating to the terminal device and the signal strength; a storage controller that exercises such control that the identifier and the signal strength are correlated with each other and stored in the storage as a proximity station list; a setter; and an output controller.

Abstract: There is provided a communication device including a transmission unit that transmits predetermined information to a base station in accordance with a transmission order of its own and a transmission cycle preset in the communication device of its own, a receiving unit that receives, from other communication device, a reception signal and a transmission order preset in the other communication device, and a control unit that extends the transmission cycle of the communication device of its own when the receiving unit receives a specific signal, compares the transmission order of its own with the transmission order of the other communication device to calculate a transmission timing for transmitting the predetermined information to the base station, and controls the transmission unit to transmit the predetermined information to the base station.