Wireless communications system, terminal, base station, and process method

1. A wireless communications system comprising:

a terminal configured to adjust a transmission count of consecutive transmissions of a same data to a base station, based on a radio resource count of radio resources assigned to the terminal, among a plurality of radio resources of a control channel received from the base station; and

the base station configured to identify the transmission count based on the radio resource count of the radio resources assigned to the terminal among the plurality of radio resources of the transmitted control channel, and receive the same data consecutively transmitted by the terminal, based on the identified transmission count, wherein

a relation of the radio resource count and the transmission count includes a correspondence relation, the correspondence relation is a relation where the transmission count becomes greater as the radio resource count becomes greater.

2. The wireless communications system according to claim 1 , wherein

the terminal stores a predetermined correspondence relation of the radio resource count and the transmission count, and adjusts the transmission count based on the correspondence relation, and

the base station stores the correspondence relation, and identifies the transmission count based on the correspondence relation.

3. The wireless communications system according to claim 2 , wherein

the base station changes the correspondence relation based on a difference between a first value indicating wireless communication quality from the base station to the terminal and a second value indicating wireless communication quality from the terminal to the base station, and notifies the terminal of the changed correspondence relation.

4. The wireless communications system according to claim 2 , wherein the correspondence relation is a correspondence relation of the radio resource count and a switching pattern of the transmission count.

5. The wireless communications system according to claim 1 , wherein

the terminal adjusts the transmission count based on a combination of the radio resource count of the assigned radio resources and a state of reordering by the base station with respect to a data string stored in the assigned radio resources, and

the base station identifies the transmission count based on the combination of the radio resource count of the assigned radio resources and the state of the reordering by the base station with respect to the data string stored in the assigned radio resources.

6. The wireless communications system according to claim 5 , wherein,

the terminal adjusts the transmission count based on a predetermined correspondence relation of the transmission count and the combination of the radio resource count and the state of the reordering, and

the base station stores the correspondence relation, and identifies the transmission count based on the correspondence relation.

7. The wireless communications system according to claim 1 , wherein

the terminal adjusts the transmission count based on a combination of the radio resource count of the assigned radio resources and a state of inversion by the base station with respect to a data string stored in the assigned radio resources, and

the base station identifies the transmission count based on the combination of the radio resource count of the assigned radio resources and the state of inversion by the base station with respect to the data string stored in the assigned radio resources.

8. The wireless communications system according to claim 7 , wherein

the terminal stores a predetermined correspondence relation of the state of inversion and the radio resource count, and adjusts the transmission count based on the correspondence relation, and

the base station stores the correspondence relation and identifies the transmission count based on the correspondence relation.

9. The wireless communications system according to claim 1 , wherein the base station adjusts the radio resource count of the radio resources assigned to the terminal among the plurality of radio resources of the control channel, based on a value indicating wireless communication quality from the base station to the terminal.

10. The wireless communications system according to claim 1 , wherein the transmission count is a transmission time interval (TTI) bundle count in TTI bundling.

11. The wireless communications system according to claim 1 , wherein

the control channel is a physical downlink control channel (PDCCH),

the radio resource is a control channel element (CCE), and

the same data is a physical uplink shared channel (PUSCH).

12. The wireless communications system according to claim 1 , wherein the same data is a message 3 of a random access channel (RACH).

13. A terminal comprising:

a receiving circuit configured to receive a control channel transmitted from a base station;

an adjusting circuit configured to adjust a transmission count of consecutive transmissions of a same data to the base station, based on a radio resource count of radio resources assigned to the terminal among a plurality of radio resources of the control channel received by the receiving circuit; and

a transmitting circuit configured to consecutively transmit the same data to the base station, for the transmission count adjusted by the adjusting circuit, wherein

a relation of the radio resource count and the transmission count includes a correspondence relation, the correspondence relation is a relation where the transmission count becomes greater as the radio resource count becomes greater.

14. A base station comprising:

a transmitting circuit configured to transmit a control channel;

an identifying circuit configured to identify based on a radio resource count of radio resources assigned to a terminal among a plurality of radio resources of the control channel transmitted by the transmitting circuit, a transmission count of transmissions of a same data by the terminal to the base station; and

a receiving circuit configured to receive based on the transmission count identified by the identifying circuit, the same data transmitted consecutively by the terminal, wherein

a relation of the radio resource count and the transmission count includes a correspondence relation, the correspondence relation is a relation where the transmission count becomes greater as the radio resource count becomes greater.

15. A process method at a terminal, the process method comprising:

receiving, by the terminal, a control channel transmitted from a base station;

adjusting, by the terminal, a transmission count of consecutive transmissions of a same data to the base station, based on a radio resource count of radio resources assigned to the terminal among a plurality of radio resources of the received control channel; and

transmitting, by the terminal, the same data to the base station, consecutively for the adjusted transmission count, wherein

a relation of the radio resource count and the transmission count includes a correspondence relation, the correspondence relation is a relation where the transmission count becomes greater as the radio resource count becomes greater.

16. A process method at a base station, the process method comprising:

transmitting, by the base station, a control channel;

identifying, by the base station and based on a radio resource count of radio resources assigned to a terminal among a plurality of radio resources of the transmitted control channel, a transmission count of transmissions of a same data by the terminal to the base station; and

receiving, by the base station and based on the identified transmission count, the same data consecutively transmitted by the terminal, wherein

a relation of the radio resource count and the transmission count includes a correspondence relation, the correspondence relation is a relation where the transmission count becomes greater as the radio resource count becomes greater.

17. A wireless communications system comprising:

a terminal configured to adjust based on a radio resource count of radio resources assigned to the terminal among a plurality of radio resources of a control channel received from a base station, a period from transmission of data to the base station until the data is retransmitted; and

the base station configured to identify the period based on the radio resource count of the radio resources assigned to the terminal among the plurality of radio resources of the transmitted control channel, and receive based on the identified period, a same data consecutively transmitted by the terminal, wherein

a relation of the radio resource count and the period includes a relation where the period becomes greater as the radio resource count becomes greater.

18. A wireless communications system comprising:

a terminal configured to adjust based on a radio resource count of radio resources assigned to the terminal among a plurality of radio resources of a control channel received from a base station, a process count of a process of transmitting a same data to the base station; and

the base station configured to identify the process count, based on the radio resource count of the radio resources assigned to the terminal among the plurality of radio resources of the transmitted control channel, and receive based on the identified process count, the same data transmitted by the terminal, wherein

a relation of the radio resource count and the process count includes a correspondence relation, the correspondence relation is a relation where the process count becomes greater as the radio resource count becomes greater.

19. The wireless communications system according to claim 18 , wherein the process is a hybrid automatic repeat request (HARQ) process.