User device
A user device performing communication with another user device by beamforming in a first frequency and a second frequency different from the first frequency is provided. The user device includes a receiving unit configured to receive a first sensing signal in the first frequency; a control unit configured to select a resource in the second frequency used for transmission, based on a resource location on a radio frame in which the first sensing signal is provided, or based on information, contained in the first sensing signal, indicating a resource location on a radio frame in the second frequency; and a transmitting unit configured to perform data transmission in the second frequency by using the selected resource.
1. A terminal that communicates with another terminal by beamforming in a first frequency and a second frequency different from the first frequency, the terminal comprising:
a receiving unit configured to receive a first sensing signal in the first frequency;
a control unit configured to select a resource in the second frequency used for transmission, based on a resource location on a radio frame in which the first sensing signal is provided, or based on information contained in the first sensing signal, the information indicating a resource location on a radio frame in the second frequency; and
a transmitting unit configured to perform data transmission in the second frequency by using the selected resource.
2. The terminal according to claim 1 , wherein the resource location on the radio frame in which the first sensing signal is provided is associated with the resource location on the radio frame in the second frequency used for the transmission.
3. The terminal according to claim 2 , wherein the control unit is configured
to select resources in the second frequency used for beam switching or repetitive beam transmission, based on a single resource location on the radio frame in which the first sensing signal is provided, or based on the information contained in the first sensing signal, the information indicating multiple resource locations on the radio frame in the second frequency; and
to exclude the selected resources from candidates of resources to be used for transmission on the second frequency.
4. The terminal according to claim 1 , wherein the control unit is configured to determine whether or not to perform sensing in the second frequency for selecting a resource in the second frequency, without performing sensing in the first frequency for selecting a resource in the second frequency.
5. The terminal according to claim 1 , wherein the control unit is configured to select the resource in the second frequency used for transmission, based on received power of the first sensing signal on a single resource in the radio frame in which the first sensing signal is provided, or based on average received power of the first sensing signal on multiple resources in the radio frame in which the first sensing signal is provided.
6. The terminal according to claim 1 , further comprising a generating unit configured to generate a second sensing signal containing information indicating another resource location on the radio frame in the second frequency; wherein
the transmitting unit is configured to transmit the generated second sensing signal by using a resource in the first frequency associated with said another resource location on the radio frame in the second frequency.