Radio communication device and response signal diffusion method
View Patent ↗Provided is a radio communication device which can suppress inter-code interference between an ACK/NACK signal and a CQI signal which are code-multiplexed. A diffusion unit ( 214 ) diffuses the ACK/NACK signal inputted from a judgment unit ( 208 ) by using a ZC sequence. A diffusion unit ( 219 ) diffuses the CQI signal by using a cyclic shift ZC sequence. By using a Walsh sequence, a diffusion unit ( 216 ) further diffuses the ACK/NACK signal which has been diffused by using the ZC sequence. A control unit ( 209 ) controls the diffusion unit ( 214 ), the diffusion unit ( 216 ), and the diffusion unit ( 219 ) so that the minimum value of the difference between the CQI signals from a plurality of mobile stations and a cyclic shift amount of the ACK/NACK signal is not smaller than the minimum value of the difference between the cyclic shift amounts of the ACK/NACK signals from the plurality of mobile stations.
1. A base station apparatus, comprising:
a transmitter configured to transmit, to a plurality of mobile stations, control information on a control channel element (CCE), wherein the CCE is associated with a physical uplink control channel (PUCCH) and the PUCCH is determinative of a cyclic shift value among a plurality of cyclic shift values comprising a set of channel quality indicator (CQI) cyclic shift values and a set of acknowledgement/negative acknowledgement (ACK/NACK) cyclic shift values, with one or more unused cyclic shift values separating the sets of CQI cyclic shift values and ACK/NACK cyclic shift values; and
a receiver configured to receive:
CQI signals transmitted by one or more mobile stations of the plurality using respective CQI cyclic shift values of the set of CQI cyclic shift values; and
ACK/NACK signals transmitted by one or more mobile stations of the plurality using respective ACK/NACK cyclic shift values of the set of ACK/NACK cyclic shift values.
2. The base station of claim 1 wherein an unused cyclic shift value is positioned after a CQI cyclic shift value and before an ACK/NACK cyclic shift value.
3. The base station of claim 1 wherein an unused cyclic shift value is positioned after an ACK/NACK cyclic shift value and before a CQI cyclic shift value.
4. The base station of claim 1 wherein an unused cyclic shift value is positioned before the set of CQI cyclic shift values and a second unused cyclic shift value is positioned after the set of CQI cyclic shift values.
5. The base station of claim 1 wherein an unused cyclic shift value is positioned after an ACK/NACK cyclic shift value and a second unused cyclic shift value is positioned before a second ACK/NACK cyclic shift value.
6. The base station of claim 1 wherein an unused cyclic shift value is positioned after an ACK/NACK cyclic shift value and a second unused cyclic shift value is positioned before a second ACK/NACK cyclic shift value, and a CQI cyclic shift value is positioned between the unused cyclic shift value and the second unused cyclic shift value.
7. The base station of claim 1 wherein an unused cyclic shift value is positioned before the set of CQI cyclic shift values and after an ACK/NACK cyclic shift value, and a second unused cyclic shift value is positioned before a second ACK/NACK cyclic shift value and after the set of CQI cyclic shift values.
8. The base station of claim 1 wherein the set of CQI cyclic shift values consists of a single cyclic shift value.
9. The base station of claim 1 wherein the unused cyclic shift values consists of a single cyclic shift value.
10. The base station of claim 1 wherein an unused cyclic shift value is cyclically subsequent to a CQI cyclic shift value.
11. The base station of claim 1 wherein an unused cyclic shift value is cyclically subsequent to an ACK/NACK cyclic shift value.
12. The base station of claim 1 wherein an unused cyclic shift value is cyclically subsequent to an ACK/NACK cyclic shift value, and a second unused cyclic shift value is cyclically subsequent to a CQI cyclic shift value.
13. The base station of claim 1 wherein an unused cyclic shift value is cyclically subsequent to an ACK/NACK cyclic shift value, and a second unused cyclic shift value is cyclically subsequent to a CQI cyclic shift value, and the CQI cyclic shift values is positioned between the unused cyclic shift value and the second unused cyclic shift value.
14. The base station of claim 1 wherein an unused cyclic shift value is incrementally shifted from a CQI cyclic shift value by a unit of cyclic shift value and decrementally shifted from an ACK/NACK cyclic shift value by the unit.
15. The base station of claim 1 wherein an unused cyclic shift value is incrementally shifted from an ACK/NACK cyclic shift value by a unit of cyclic shift value and decrementally shifted from a CQI cyclic shift value by the unit.
16. The base station of claim 1 wherein an unused cyclic shift value is incrementally shifted from an ACK/NACK cyclic shift value by a unit of cyclic shift value and an second unused cyclic shift value is decrementally shifted from an second ACK/NACK cyclic shift value by the unit.
17. The base station of claim 1 wherein an unused cyclic shift value is incrementally shifted from an ACK/NACK cyclic shift value by a unit of cyclic shift value and decrementally shifted from a CQI cyclic shift value by the unit, and an second unused cyclic shift value is decrementally shifted from an second ACK/NACK cyclic shift value by the unit and decrementally shifted from a CQI cyclic shift value by the unit.
18. The base station apparatus of claim 1 wherein the receiver receives an ACK/NACK signal transmitted from a first mobile station of the plurality of mobile stations and a CQI signal transmitted from another mobile station of the plurality, which are mapped to a same symbol.
19. The base station apparatus of claim 1 wherein the receiver receives an ACK/NACK signal transmitted from one of the mobile stations of the plurality, which is code-multiplexed with a CQI signal transmitted from another mobile station of the plurality, or the receiver receives a CQI signal transmitted from one of the mobile stations of the plurality, which is code-multiplexed with an ACK/NACK signal transmitted from another mobile station of the plurality.
20. The base station apparatus of claim 1 wherein the receiver receives a CQI signal spread with a sequence defined by one of the set of CQI cyclic shift values, and an ACK/NACK signal spread with a sequence defined by one of the set of ACK/NACK cyclic shift values.
21. The base station apparatus of claim 1 wherein the receiver receives the CQI signal transmitted on a PUCCH, an index of which is specified from the control information, and the ACK/NACK signal transmitted on a PUCCH, an index of which is specified from the control information.
22. The base station of claim 1 wherein the set of CQI cyclic shift values, the set of ACK/NACK cyclic shift values, and the one or more unused cyclic shift values are mutually exclusive for each symbol.
23. The base station of claim 1 wherein the control information includes mobile station identification information indicating a mobile station of the plurality to which the control information is addressed.
24. A method, comprising:
transmitting, to each of a plurality of mobile stations, control information on a control channel element, wherein the CCE is associated with a physical uplink control channel (PUCCH) and the PUCCH is determinative of a cyclic shift value among a plurality of cyclic shift values, the plurality of cyclic shift values comprising a set of channel quality indicator (CQI) cyclic shift values and a set of acknowledgement/negative acknowledgement (ACK/NACK) cyclic shift values, with one or more unused cyclic shift values separating the sets of CQI cyclic shift values and ACK/NACK cyclic shift values;
receiving CQI signals transmitted by one or more mobile stations of the plurality using respective CQI cyclic shift values of the set of CQI cyclic shift values; and
receiving ACK/NACK signals transmitted by one or more mobile stations of the plurality using respective ACK/NACK cyclic shift values of the set of ACK/NACK cyclic shift values.
25. The method of claim 24 wherein the set of CQI cyclic shift values, the set of ACK/NACK cyclic shift values, and the one or more unused cyclic shift values are mutually exclusive for each symbol.
26. The method of claim 24 wherein an unused cyclic shift value is positioned before the set of CQI cyclic shift values and a second unused cyclic shift value is positioned after the set of CQI cyclic shift values.
27. The method of claim 24 wherein an unused cyclic shift value is positioned before the set of ACK/NACK cyclic shift values and a second unused cyclic shift value is positioned after the set of ACK/NACK cyclic shift values.
28. A non-transitory computer-readable memory medium whose contents cause a base station to perform a method, the method comprising:
transmitting, to a plurality of mobile stations, control information on a control channel element, wherein the CCE is associated with a physical uplink control channel (PUCCH) and the PUCCH is determinative of a cyclic shift value among a plurality of cyclic shift values, the plurality of cyclic shift values comprising a set of channel quality indicator (CQI) cyclic shift values and a set of acknowledgement/negative acknowledgement (ACK/NACK) cyclic shift values, with one or more unused cyclic shift values separating the sets of CQI cyclic shift values and ACK/NACK cyclic shift values;
receiving CQI signals transmitted by one or more mobile stations of the plurality using respective CQI cyclic shift values of the set of CQI cyclic shift values; and
receiving ACK/NACK signals transmitted by one or more mobile stations of the plurality using respective ACK/NACK cyclic shift values of the set of ACK/NACK cyclic shift values.
29. The non-transitory computer-readable memory medium of claim 28 wherein an unused cyclic shift value is positioned before the set of CQI cyclic shift values and a second unused cyclic shift value is positioned after the set of CQI cyclic shift values.
30. The non-transitory computer-readable memory medium of claim 28 wherein the set of CQI cyclic shift values, the set of ACK/NACK cyclic shift values, and the one or more unused cyclic shift values are mutually exclusive for each symbol.
31. The non-transitory computer-readable memory medium of claim 28 wherein a received CQI signal is spread by one of the mobile stations of the plurality with a sequence defined by one of the set of CQI cyclic shift values, and a received ACK/NACK signal is spread by one of the mobile stations of the plurality with a sequence defined by one of the set of ACK/NACK cyclic shift values.