Communication terminal apparatus, communication control system, and communication control method

1. A communication terminal apparatus comprising:

a memory configured to store a control program, and

a processor configured to execute a control program and in response to executing the control program causes the communication terminal apparatus to perform operations, the operations comprising:

assigning a usage right of a first subframe, from among a plurality of subframes included in a frame, to a base station, in a case where terminal-to-terminal communication is performed by transmission and reception of the frame directly with a different communication terminal apparatus of a plurality of communication terminal apparatuses, based on frequency information reported from the base station and by selecting a configuration number from among a plurality of configuration numbers each indicating combinations which include a first combination between a third subframe of the plurality of subframes and a corresponding communication terminal apparatus of the plurality of communication terminal apparatuses which is allowed to use the third subframe, a second combination between a fourth subframe of the plurality of subframes and the base station which is allowed to use the fourth subframe, and a third combination between a fifth subframe of the plurality of subframes and information of a switching point; and

acquiring, during the terminal-to-terminal communication, information which the base station transmits in accordance with a timing when the communication terminal apparatus receives the first subframe corresponding to the fourth subframe specified by a selected configuration number using the information of the switching point specified by the selected configuration number.

2. The communication terminal apparatus according to claim 1 , wherein the operations further comprise selecting, as the first subframe, an initial subframe from among the plurality of subframes.

3. The communication terminal apparatus according to claim 1 , wherein the operations further comprise selecting, as the first subframe, two or more subframes from among the plurality of subframes.

4. The communication terminal apparatus according to claim 1 , wherein the operations further comprise notifying the base station of the first subframe by transmitting the configuration number.

5. The communication terminal apparatus according to claim 1 , wherein the plurality of configuration numbers and the corresponding combinations are stored in a table in association with each other.

6. A communication control system that performs communication between a base station, a first communication terminal apparatus and a second communication terminal apparatus included in a plurality of communication terminal apparatuses,

wherein the first communication terminal apparatus includes:

a memory configured to store a control program, and

a processor configured to execute the control program and in response to executing the control program causes the communication terminal apparatus to perform operations, the operations comprising:

assigning a usage right of a first subframe from among a plurality of subframes included in a frame, to the base station, in a case where terminal-to-terminal communication is performed by transmission and reception of the frame directly with the second communication terminal apparatus, based on frequency information reported from the base station and by selecting a configuration number from among a plurality of configuration numbers each indicating combinations which include a first combination between a third subframe of the plurality of subframes and a corresponding communication terminal apparatus of the plurality of which is allowed to use the third subframe, a second combination between a fourth subframe of the plurality of subframes and the base station which is allowed to use the fourth subframe, and a third combination between a fifth subframe of the plurality of subframes and information of a switching point;

reporting, to the base station, a first information of the first subframe and a second information of a timing of transmission and reception of the frame transmitted and received between the first communication terminal apparatus and the second communication terminal apparatus; and

acquiring, during the terminal-to-terminal communication, a third information which the base station transmits in accordance with a timing when the communication terminal apparatus receives the first subframe corresponding to the fourth subframe specified by a selected configuration number using the information of the switching point specified by the selected configuration number.

7. The communication control system according to claim 6 , wherein the base station includes a controller that synchronizes with the timing of the transmission and reception of the frame, based on the first information and the second information, and transmits the third information to the first communication terminal apparatus to match with a timing at which the first subframe arrives at the first communication terminal apparatus.

8. The communication control system according to claim 6 , wherein the operations further comprise, reporting to the base station fourth information of the switching point representing a timing at which switching between uplink and downlink of the frame is performed, and makes a synchronization among the first communication terminal apparatus, the second communication terminal apparatus, and the base station.

9. The communication control system according to claim 6 , wherein the first information and the second information are reported to the base station via a management unit included in the communication control system.

10. The communication control system according to claim 6 , wherein the operations further comprise notifying the base station of the first information by transmitting the configuration number.

11. The communication control system according to claim 6 , wherein the plurality of configuration numbers and the corresponding combinations are stored in a table in association with each other.

12. A communication control method, the communication control method comprising:

assigning, by a computer, a usage right of a first subframe, from among a plurality of subframes included in a frame, to a base station, in a case where terminal-to-terminal communication is performed by transmission and reception of the frame directly with a different communication terminal apparatus of a plurality of communication terminal apparatuses, based on frequency information reported from the base station and by selecting a configuration number from among a plurality of configuration numbers each indicating combinations which include a first combination between a third subframe of the plurality of subframes and a corresponding communication terminal apparatus of the plurality of communication terminal apparatuses which is allowed to use the third subframe, a second combination between a fourth subframe of the plurality of subframes and the base station which is allowed to use the fourth subframe, and a third combination between a fifth subframe of the plurality of subframes and information of a switching point; and

acquiring, during the terminal-to-terminal communication, information which the base station transmits in accordance with a timing when the communication terminal apparatus receives the first subframe corresponding to the fourth subframe specified by a selected configuration number using the information of the switching point specified by the selected configuration number.

13. The communication control method according to claim 12 , wherein an initial subframe of the plurality of subframes is selected as the first subframe.

14. The communication control method according to claim 12 , wherein two or more subframes are selected as the first subframe.

15. The communication control method according to claim 12 , further comprising notifying the base station of the first subframe by transmitting the configuration number.

16. The communication control method according to claim 12 , wherein the plurality of configuration numbers and the corresponding combinations are stored in a table in association with each other.