Communication device, radio communication system, radio communication method, and terminal
AssigneeHitachi, Ltd.
InventorsTsuyoshi TAMAKI, Hirotake ISHII
Life of this patent
Estimating the term…
Abstract
Reception power of a terminal for a first communication scheme is measured. A propagation path loss between a base station and the terminal is calculated. The propagation path loss is estimated in a case where communications are conducted using a second communication scheme, and reception power of the terminal is estimated from output of the base station for the second communication scheme and the estimated propagation path loss. If the sufficiency and stability of the reception power are assumed, the switching from the first communication scheme to the second communication scheme is done. In this way, stable communications using the second communication scheme are ensured.
Claims16
A communication device that communicates with a terminal by using a first communication scheme, the terminal capable of conducting communications by using the first communication scheme and a second communication scheme, the communication device comprising:
- a reception power measuring section receiving first reception power of the terminal for the first communication scheme;
- a control section estimating reception power of the terminal for the second communication scheme, on the basis of first transmission power to the terminal for the first communication scheme, the first reception power acquired by the reception power measuring section, and second transmission power to the terminal from a second communication device that conducts communications by using the second communication scheme;
- and
- an output section that outputs information for switching from the communication device to the second communication device, on the basis of a result of the estimation.
A radio communication system comprising:
- a terminal capable of conducting communications by using a first communication scheme and a second communication scheme;
- and
- a first communication device communicating with the terminal by using the first communication scheme,
- wherein the terminal transmits first reception power of the terminal for the first communication scheme, and the first communication device receives the first reception power, estimates reception power of the terminal for the second communication scheme, on the basis of first transmission power to the terminal for the first communication scheme, the received first reception power, and second transmission power to the terminal from a second communication device that conducts communications by using the second communication scheme, and outputs information regarding a result of the estimation.
A radio communication method performed by a terminal and a first communication device, the terminal capable of conducting communications by using a first communication scheme and a second communication scheme, the first communication device communicating with the terminal by using the first communication scheme, the radio communication method comprising:
- transmitting first reception power of the terminal for the first communication scheme from the terminal;
- receiving the first reception power by using the first communication device;
- estimating reception power of the terminal for the second communication scheme, on the basis of first transmission power to the terminal for the first communication scheme, the received first reception power, and second transmission power to the terminal from a second communication device that conducts communications by using the second communication scheme;
- and
- outputting information regarding a result of the estimation.
16-17. (canceled)
Dependencies are inferred from the claim text.