Terminal, base station, radio communication system and radio communication method
A terminal comprises: a control unit that performs, when a base station configures a broader carrier bandwidth wider than a maximum carrier bandwidth supported by the terminal, a communication capable of using a second number of frequency resource larger than a first number of frequency resource, the first number of frequency resource is available by the base station on an assumption that the terminal uses the broader carrier bandwidth.
1 . A terminal comprising:
a receiver configured to receive from a base station, information configuring a wideband carrier bandwidth wider than a maximum carrier bandwidth supported by the terminal; and
a controller configured to perform a communication using frequency resources with the maximum carrier bandwidth as an upper limit, the frequency resources allocated within the wideband carrier bandwidth,
wherein the wideband carrier bandwidth has a second frequency resource number greater than a first frequency resource number that can be allocated by the base station on an assumption that the terminal uses the wideband carrier bandwidth.
2 . The terminal of claim 1 , wherein
the controller is configured to perform the communication using two or more specific bandwidths in the wideband carrier bandwidth, and
each of the two or more specific bandwidths has an upper limit of the maximum carrier bandwidth.
3 . The terminal of claim 2 , wherein
guard bands provided at both ends of each of the two or more specific bandwidths are narrower than existing guard bands.
4 . The terminal of claim 1 , wherein
the controller is configured to perform the communication using two or more specific bandwidths configured as an upper limit of the maximum carrier bandwidth in the broader carrier bandwidth, and
the subcarrier spacing applied to each of the two or more specific bandwidths is the same.
5 . A base station comprising:
a transmitter configured to transmit to a terminal, information configuring a wideband carrier bandwidth wider than a maximum carrier bandwidth supported by the terminal; and
a controller configured to perform a communication using frequency resources with the maximum carrier bandwidth as an upper limit, the frequency resources allocated within the wideband carrier bandwidth,
wherein the wideband carrier bandwidth has a second frequency resource number greater than a first frequency resource number that can be allocated by the base station on an assumption that the terminal uses the wideband carrier bandwidth.
6 . A radio communication system comprising:
a terminal; and
a base station; wherein
the terminal is configured to receive from a base station, information configuring a wideband carrier bandwidth wider than a maximum carrier bandwidth supported by the terminal,
the terminal is configured to perform a communication using frequency resources with the maximum carrier bandwidth as an upper limit, the frequency resources allocated within the wideband carrier bandwidth, and
the wideband carrier bandwidth has a second frequency resource number greater than a first frequency resource number that can be allocated by the base station on an assumption that the terminal uses the wideband carrier bandwidth.
7 . A radio communication method comprising:
receiving by a terminal from a base station, information configuring a wideband carrier bandwidth wider than a maximum carrier bandwidth supported by the terminal; and
performing by the terminal, a communication using frequency resources with the maximum carrier bandwidth as an upper limit, the frequency resources allocated within the wideband carrier bandwidth,
wherein the wideband carrier bandwidth has a second frequency resource number greater than a first frequency resource number that can be allocated by the base station on an assumption that the terminal uses the wideband carrier bandwidth.