Reporting channel state information

1. A method, comprising:

configuring one or more parameters, including reporting periodicity, subframe offset and channel state information mode, relating to periodic reporting of channel state information by a user equipment;

generating a resource allocation message including a flag to enable or disable the reporting of the channel state information in a subframe configured for periodic reporting or aperiodic reporting; and

initiating transmission of the resource allocation message to the user equipment, wherein configuration information for the one or more parameters is transmitted using a higher layer signaling protocol including radio resource control.

2. The method of claim 1 , wherein the one or more parameters include reporting mode; and wherein the configuration information for the one or more parameters is transmitted using a higher layer signaling protocol including medium access control.

3. The method of claim 2 , wherein lack of the configuration information for the one or more parameters configures the user equipment for aperiodic reporting of the channel state information.

4. The method of claim 1 , wherein presence of the flag to enable the reporting of channel state information in the resource allocation message indicates presence of the channel state information in a data transmission using resources specified in the resource allocation message.

5. The method of claim 1 , further comprising:

modifying or removing the configuration information for the one or more parameters;

generating a second resource allocation message including a flag to enable or disable the reporting of the channel state information in a subframe configured for periodic reporting; and

initiating transmission of the second resource allocation message to the user equipment.

6. An apparatus comprising a processor and a memory storing executable instructions that if executed cause the apparatus to at least perform the following:

configuring one or more parameters, including reporting periodicity, subframe offset and channel state information mode, relating to periodic reporting of channel state information by a user equipment;

generating a resource allocation message including a flag to enable or disable the reporting of the channel state information in a subframe configured for periodic reporting or aperiodic reporting; and

initiating transmission of the resource allocation message to the user equipment, wherein configuration information for the one or more parameters is transmitted using a higher layer signaling protocol including radio resource control.

7. An apparatus according to claim 6 , wherein the processor and the memory are caused to further perform the following:

modifying or removing the configuration information for the one or more parameters;

generating a second resource allocation message including a flag to enable or disable the reporting of the channel state information in a subframe configured for periodic reporting; and

initiating transmission of the second resource allocation message to the user equipment.

8. An apparatus according to claim 6 , wherein the apparatus is part of a system further comprising:

a base station configured to allocate resources to the user equipment and receive channel state information.

9. A method, comprising:

receiving configuration information, from a base station, for one or more parameters, including reporting periodicity, subframe offset and channel state information mode, relating to periodic reporting of channel state information;

receiving a resource allocation message including a flag to enable or disable the reporting of the channel state information in a subframe configured for periodic reporting or aperiodic reporting;

determining the channel state information according to the configuration information; and

initiating reporting of the channel state information to the base station according to the flag, wherein configuration information for the one or more parameters is received via a higher layer signaling protocol including radio resource control.

10. The method of claim 9 , wherein the one or more parameters include reporting mode; and wherein the configuration information for the one or more parameters is received via a higher layer signaling protocol including medium access control.

11. The method of claim 9 , wherein lack of the configuration information for the one or more parameters indicates aperiodic reporting of the channel state information.

12. The method of claim 9 , wherein the channel state information is reported in a data transmission using resources specified in the resource allocation message.

13. The method of claim 9 , further comprising:

receiving revised configuration information for the one or more parameters;

receiving a second resource allocation message including a flag to enable or disable the reporting of the channel state information in a subframe configured for periodic reporting;

determining the channel state information according to the revised configuration information; and

initiating reporting of the channel state information to the base station according to the flag in the second resource allocation message.

14. An apparatus comprising a processor and a memory storing executable instructions that if executed cause the apparatus to at least perform the following:

receiving configuration information, from a base station, for one or more parameters, including reporting periodicity, subframe offset and channel state information mode, relating to periodic reporting of channel state information;

receiving a resource allocation message including a flag to enable or disable the reporting of the channel state information in a subframe configured for periodic reporting or aperiodic reporting;

determining the channel state information according to the configuration information; and

initiating reporting of the channel state information to the base station according to the flag, wherein configuration information for the one or more parameters is received via a higher layer signaling protocol including radio resource control.

15. The apparatus of claim 14 , wherein the processor and the memory are caused to further perform the following:

receiving revised configuration information for the one or more parameters;

receiving a second resource allocation message including a flag to enable or disable the reporting of the channel state information in a subframe configured for periodic reporting;

determining the channel state information according to the revised configuration information; and

initiating reporting of the channel state information to the base station according to the flag in the second resource allocation message.

16. The apparatus of claim 14 , wherein the apparatus is a mobile phone further comprising:

user interface circuitry and user interface software configured to facilitate user control of at least some functions of the mobile phone through use of a display and configured to respond to user input; and

a display and display circuitry configured to display at least a portion of a user interface of the mobile phone, the display and display circuitry configured to facilitate user control of at least some functions of the mobile phone.

17. An apparatus comprising:

means for receiving configuration information, from a base station, for one or more parameters, including reporting periodicity, subframe offset and channel state information mode, relating to periodic reporting of channel state information;

means for receiving a resource allocation message including a flag to enable or disable the reporting of the channel state information in a subframe configured for periodic reporting or aperiodic reporting;

means for determining the channel state information according to the configuration information; and

means for initiating reporting of the channel state information to the base station according to the flag, wherein configuration information for the one or more parameters is received via a higher layer signaling protocol including radio resource control.

18. An apparatus according to claim 17 , further comprising:

means for receiving revised configuration information for the one or more parameters;

means for receiving a second resource allocation message including a flag to enable or disable the reporting of the channel state information in a subframe configured for periodic reporting;

means for determining the channel state information according to the revised configuration information; and

means for initiating reporting of the channel state information to the base station according to the flag in the second resource allocation message.