Apparatus and method

1. An apparatus comprising:

a storage; and

circuitry configured to

variably set at least any of bandwidth of a subcarrier or time length of a subsymbol in a first radio resource,

store, in the storage, information indicating setting content of the first radio resource in a second radio resource, wherein the second radio resource has predetermined values set for the bandwidth of the subcarrier and the time length of the subsymbol, the predetermined values being predetermined in both the circuitry and a receiving terminal, and

control modulation and transmission of the first radio resource and the second radio resource to the receiving terminal.

2. The apparatus according to claim 1 , wherein the first radio resource and the second radio resource in which the information indicating the setting content of the first radio resource is stored are transmitted in a same frequency band.

3. The apparatus according to claim 1 , wherein the first radio resource and the second radio resource in which the information indicating the setting content of the first radio resource is stored are transmitted in different frequency bands.

4. The apparatus according to claim 3 , wherein a frequency band that includes the second radio resource in which the information indicating the setting content of the first radio resource is stored is a frequency band of a primary cell, and a frequency band that does not include the second radio resource in which the information indicating the selling content of the first radio resource is stored is a frequency band of a secondary cell.

5. The apparatus according to claim 3 , wherein among a plurality of frequency bands that are transmitted, an entirety of at least one frequency band is the second radio resource, and an entirety of another frequency band is the first radio resource.

6. The apparatus according to claim 1 , wherein the information indicating the setting content of the first radio resource is included in system information.

7. The apparatus according to claim 6 , wherein every piece of or some of pieces of system information that are periodically transmitted are stored in the second radio resource.

8. The apparatus according to claim 6 , wherein a part or an entirety of the system information is stored in the second radio resource.

9. The apparatus according to claim 6 , wherein the system information is a master information block (MIB).

10. The apparatus according to claim 6 , wherein the system information is a system information block (SIB).

11. The apparatus according to claim 1 , wherein the information indicating the setting content of the first radio resource is included in an individual signaling message.

12. The apparatus according to claim 1 , wherein information for identifying a position of the second radio resource is included in system information.

13. The apparatus according to claim 1 , wherein information for identifying a position of the second radio resource is included in a synchronization signal.

14. The apparatus according to claim 1 , wherein the predetermined value set for the time length of the subsymbol in the second radio resource is time length of a symbol in orthogonal frequency-division multiplexing (OFDM).

15. The apparatus according to claim 1 , wherein the predetermined value set for the bandwidth of the subcarrier in the second radio resource is bandwidth of a subcarrier in orthogonal frequency-division multiplexing (OFDM).

16. The apparatus according to claim 1 , wherein the information indicating the setting content of the first radio resource is an index corresponding to the setting content of the first radio resource.

17. The apparatus according to claim 1 , wherein the circuitry is configured to perform filtering on the first radio resource and the second radio resource for each subcarrier.

18. An apparatus comprising:

a storage; and

circuitry configured to

receive a transmitted first radio resource and a transmitted second radio resource,

store the first radio resource and the second radio resource in the storage,

demodulate the second radio resource in which information indicating setting content of the first radio resource in which at least any of bandwidth of a subcarrier or time length of a subsymbol of the first radio resource is variably set is stored, and predetermined values are predetermined in the circuitry for the bandwidth of the subcarrier and the time length of the subsymbol of the second radio resource, and

demodulate the first radio resource on a basis of the information indicating the setting content of the first radio resource.

19. A method comprising:

variably setting, using circuitry, at least any of bandwidth of a subcarrier or time length of a subsymbol in a first radio resource,

storing, in a storage, by the circuitry, information indicating setting content of the first radio resource in a second radio resource, wherein the second radio resource has predetermined values set for the bandwidth of the subcarrier and the time length of the subsymbol, the predetermined values being predetermined in both the circuitry and a receiving terminal, and

controlling modulation and transmission of the first radio resource and the second radio resource to the receiving terminal.

20. A method comprising:

receiving, using circuitry, a transmitted first radio resource and a transmitted second radio resource,

storing the first radio resource and the second radio resource in a storage,

demodulating, using the circuitry, the second radio resource in which information indicating setting content of the first radio resource in which at least any of bandwidth of a subcarrier or time length of a subsymbol of the first radio resource is variably set is stored, and predetermined values are predetermined in the circuitry for the bandwidth of the subcarrier and the time length of the subsymbol of the second radio resource, and

demodulating, using the circuitry, the first radio resource on a basis of the information indicating the setting content of the first radio resource.