Base station apparatus, mobile station apparatus, radio communication method, and radio communication system

1. A base station apparatus for performing radio communication with a mobile station apparatus, the base station apparatus comprising:

a group generation unit which groups a plurality of mobile station apparatuses whose timing differences between a reception frame and transmission frame calculated on the basis of a signal received from the mobile station apparatus fall within a constant range; and

a transmission unit which transmits a control amount of timing difference to the grouped plurality of mobile station apparatuses.

2. The base station apparatus according to claim 1 , wherein the group generation unit allocates a same identifier for the grouped plurality of mobile station apparatuses.

3. The base station apparatus according to claim 2 , wherein the transmission unit transmits a timing difference control signal and the identifier to the grouped plurality of mobile station apparatuses.

4. The base station apparatus according to claim 2 , wherein the transmission unit transmits a timing difference control signal and the identifier to the grouped plurality of mobile station apparatuses by using a paging channel.

5. The base station apparatus according to claim 2 , wherein the transmission unit transmits a timing difference control signal and the identifier as broadcast information to the grouped plurality of mobile station apparatuses.

6. The base station apparatus according to claim 1 , wherein the transmission unit transmits the identifier to each of the grouped plurality of mobile station apparatuses, and transmits the control amount of timing difference and the identifier to the grouped plurality of mobile station apparatuses.

7. The base station apparatus according to claim 6 , wherein the transmitting unit transmits the identifier by using a first transmission channel by which a data signal is transmitted, when the transmitting unit transmits the identifier to each of the grouped plurality of mobile station apparatuses, and the transmitting unit transmits the control amount of timing difference by the first transmission channel and transmits the control amount of timing difference by a second transmission channel by which a control signal is transmitted, when the transmitting unit transmits the control amount of timing difference and the identifier to the grouped plurality of mobile station apparatuses.

8. The base station apparatus according to claim 1 , wherein the group generation unit groups the plurality of mobile station apparatuses in which an amount of reception timing error falls within a constant range.

9. The base station apparatus according to claim 1 , wherein the group generation unit groups the plurality of mobile station apparatuses in which an amount of reception timing error falls within a constant range and allocates a same identifier for the grouped plurality of mobile station apparatuses.

10. The base station apparatus according to claim 1 , wherein the group generation unit groups the plurality of mobile station apparatuses in which a fluctuation amount of reception timing error falls within a constant range.

11. The base station apparatus according to claim 1 , wherein the group generation unit groups the plurality of mobile station apparatuses in which a fluctuation amount of reception timing error falls within a constant range and allocates a same identifier for the grouped plurality of mobile station apparatuses.

12. The base station apparatus according to claim 1 , wherein the control amount of timing difference is a relative value which is a differential value between a first and second control amounts of timing difference, or an absolute value of the first or second control amounts of timing difference.

13. The base station apparatus according to claim 1 , wherein the control amount of timing difference includes a transmission timing in a case where the mobile station apparatus transmits a radio signal to the base station apparatus.

14. The base station apparatus according to claim 1 , wherein the transmitting unit transmits the control amount of timing difference to the mobile station apparatus in which an amount of reception timing error is higher than an individual error threshold value, of the grouped plurality of mobile station apparatuses.

15. The base station apparatus according to claim 1 , wherein the group generation unit groups delete from the group and groups an another group to the mobile station apparatus in which a state is continued where an amount of reception timing error is higher than an individual error threshold value, or deletes from the group and controls the transmission unit to transmit the control amount of timing difference of the mobile station apparatus deleted from the group.

16. A mobile station apparatus for performing radio communication with a base station apparatus, the mobile station apparatus comprising:

a reception unit which receives a control amount of timing difference transmitted to a grouped plurality of mobile station apparatuses, the plurality of mobile station apparatuses whose timing differences between a reception frame and transmission frame calculated on the basis of a signal received from the mobile station apparatus fall within a constant range and which is grouped; and

a transmission timing control unit which controls a transmission timing of a radio signal transmitting to the base station apparatus in accordance with the received control amount of timing difference.

17. A radio communication method in a base station apparatus for performing radio communication with mobile station apparatus, the method comprising:

grouping a plurality of mobile station apparatuses whose timing differences between a reception frame and transmission frame calculated on the basis of a signal received from the mobile station apparatus fall within a constant range; and

transmitting the control amount of timing difference to the grouped plurality of mobile station apparatuses.

18. A radio communication method in a mobile station apparatus for performing radio communication with a base station apparatus, the method comprising:

receiving a control amount of timing difference transmitted to a grouped plurality of mobile station apparatuses, the plurality of mobile station apparatuses whose timing differences between a reception frame and transmission frame calculated on the basis of a signal received from the mobile station apparatus fall within a constant range and which is grouped; and

controlling a transmission timing of a radio signal transmitting to the base station apparatus in accordance with the received control amount of timing difference.

19. A radio communication system comprising;

a mobile station apparatus; and

a base station apparatus, wherein

radio communication is performed between the mobile station apparatus and the base station apparatus,

the base station apparatus includes:

a group generation unit which groups a plurality of mobile station apparatus whose timing differences between a reception frame and transmission frame calculated on the basis of a signal received from the mobile station apparatus fall within a constant range; and

a transmitting unit which transmits the control amount of timing difference to the grouped plurality of mobile station apparatus, and

the mobile station apparatus includes:

a reception unit which receives the control amount of timing difference; and

a transmission timing control unit which controls a transmission timing of a radio signal transmitting to the base station apparatus in accordance with the received control amount of timing difference.