Method and apparatus for multi-mode control information on uplink channel

1. A method comprising:

selecting, by a mobile unit, one of a plurality of control information reporting modes for transmitting one or more control information reports based on at least one of a payload size of the one or more control information reports, a payload size of data multiplexed with the one or more control information reports and an amount of resources used for multiplexing the one or more control information reports with the data;

constructing, by the mobile unit, a message based on the selected one of the plurality of control information reporting modes, the message including the one or more control information reports and the data, the selected one of the plurality of control information reporting modes determining a payload size of the message; and

transmitting the message periodically or aperiodically, by the mobile unit, to a base station using the selected one of the plurality of control information reporting modes.

2. The method of claim 1 , further comprising:

determining whether one or more control information need to be reported; and

constructing the one or more control information report(s) to be transmitted to the base station upon determining that the one or more control information need to be reported.

3. The method of claim 2 , wherein the control information is at least one of channel state information (CSI) and acknowledgement information.

4. The method of claim 1 , wherein the selecting further selects the one of the plurality of control information reporting modes based on control information transmission type, the control information transmission type being the one or more control information report(s) being multiplexed with uplink (UL) data.

5. The method of claim 4 , wherein the selecting selects as the one of the plurality of control information reporting modes, a control information reporting mode with a smaller payload size compared to at least one other control information reporting mode with a larger payload size, upon the one or more control information being multiplexed with the UL data.

6. The method of claim 4 , wherein the selecting selects as the one of the plurality of control information reporting modes, a control information reporting mode with a smaller payload size compared to at least one other control information reporting mode with a larger payload size, only if the payload size of the control information reporting mode with the smaller payload size multiplexed with the UL data exceeds a first threshold.

7. The method of claim 4 , wherein the selecting selects as the one of the plurality of control information reporting modes, a control information reporting mode with a smaller payload size compared to at least one other control information reporting mode with a larger payload size, if an amount of data with which the control information according to the control information reporting mode with the smaller payload size is multiplexed, is larger than a first threshold.

8. The method of claim 4 , wherein

the selecting selects as the one of the plurality of control information reporting modes, a control information reporting mode with a smaller payload size compared to at least one other control information reporting mode with a larger payload size, if an amount of resource used for multiplexing the one or more control information report(s) with the UL data is less than a first threshold, and

the selecting selects as the one of the control information reporting modes, the at least one other control information reporting mode with the larger payload size if the amount of resource used for multiplexing the one or more control information report(s) with the UL data is greater than the first threshold.

9. The method of claim 8 , wherein the amount of resources used is a number of physical resource blocks (PRBs), and

the third threshold is equal to 1 PRB.

10. The method of claim 1 , wherein the one or more control information report(s) is transmitted over a UL data channel.

11. A method comprising:

determining, by a base station, one of a plurality of control information reporting modes based on at least one of a payload size of one or more control information reports, a payload size of data multiplexed with the one or more control information reports and an amount of resources used for multiplexing the one or more control information reports with the data;

receiving, by the base station, a message over an uplink (UL) data channel, the message including the one or more control information reports and the data, the message having been constructed based on the determined one of the plurality of control information reporting modes, the determined one of the plurality of control information reporting modes determining a payload size of the message, the message having been transmitted to the base station based on at least one of a periodic and aperiodic transmission; and

processing, by the base station, the one or more control information report(s) from the received message using the determined one of the plurality of control information reporting modes.

12. The method of claim 11 , further comprising:

determining whether the received message includes one or more control information, wherein

the processing is carried out upon determining that the received message includes the one or more control information.

13. The method of claim 12 , wherein the control information is at least one of channel state information (CSI) and acknowledgement information.

14. The method of claim 11 , wherein the UL data channel is at least one of a channel for Broadcast Control Channel (BCCH), a Physical Uplink Control Channel (PUCCH), a Physical Uplink Shared Channel (PUSCH), a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Shared Channel (PDSCH).

15. A mobile device comprising:

a processor configured to,

select one of a plurality of control information reporting modes for transmitting one or more control information reports based on at least one of a payload size of the one or more control information reports, a payload size of data multiplexed with the one or more control information reports and an amount of resources used for multiplexing the one or more control information reports with the data;

construct a message based on the selected one of the plurality of control information reporting modes, the message including the one or more control information reports and the data, the selected one of the plurality of control information reporting modes determining a payload size of the message; and

transmit the message periodically or aperiodically, to a base station using the selected one of the plurality of control information reporting modes.

16. The mobile device of claim 15 , wherein the processor is further configured to,

determine whether one or more control information need to be reported; and

construct the one or more control information report(s) to be transmitted to the base station upon determining that the one or more control information need to be reported.

17. A base station comprising:

a processor configured to,

determine one of a plurality of control information reporting modes based on at least one of a payload size of one or more control information reports, a payload size of data multiplexed with the one or more control information reports and an amount of resources used for multiplexing the one or more control information reports with the data;

receive a message over an uplink (UL) data channel, the message including the one or more control information reports and the data, a message over an uplink (UL) data channel, the message including the one or more control information reports and the data, the message having been constructed based on the determined one of the plurality of control information reporting modes, the determined one of the plurality of control information reporting modes determining a payload size of the message, the message having been transmitted to the base station based on at least one of a periodic and aperiodic transmission; and

process the one or more control information report(s) from the received message using the determined one of the plurality of control information reporting modes.

18. The base station of claim 17 , wherein the processor is further configured to:

determine whether the received message includes one or more control information, wherein

the processing is carried out upon determining that the received message includes one or more control information report(s).