Method, apparatuses and computer program for reporting in-device coexistence information

1. A method, comprising

performing operations for a device with coexisting radios, wherein for carrier aggregation one radio connects to a primary cell and another radio connects to a secondary cell, the operations comprising:

determining a change in the activation status of the secondary cell,

determining interference information to be reported in response to the determined change in the activation status of the secondary cell, wherein the interference information comprises in-device coexistence interference information,

comparing the determined interference information to be reported to interference information reported previously for a similar change in the activation status of the secondary cell,

deciding whether to send the determined interference information based on the comparison, and

deciding to send and sending the determined interference information in response to the change in the activation status only when there is different information content to be reported compared to previous reporting for a similar change, wherein the determined interference information is for use by the network element for control of the device for carrier aggregation.

2. A method as claimed in claim 1 , wherein the change in activation status comprises activation or deactivation of the secondary cell.

3. A method as claimed in claim 1 , wherein the device communicates via at least one of a long-term evolution of the Universal Mobile Telecommunications System radio, an Industrial, Scientific and Medical radio, a local wireless access radio, short range link radio, a satellite system radio, and a positioning system radio.

4. A method, comprising

performing operations in a network entity for control for carrier aggregation of at least one device with coexisting radios, wherein for carrier aggregation one radio of

the at least one device connects to a primary cell corresponding to the network entity and another radio of the at least one device connects to a secondary cell, the operations comprising

storing interference information received from the at least one device in response to a changed activation status of a secondary cell, wherein the interference information comprises in-device coexistence interference information,

determining, after the storing, a new change in the activation status of the secondary cell,

determining whether new interference information is received in response to the new change in the activation status of the secondary cell, and

using the stored interference information in the control of the at least one device for carrier aggregation in response to a determination that no new interference information is received subsequent to the new change in the activation status of the secondary cell, and wherein interference information is reported in response to the change in the activation status only when there is different information content to be reported compared to previous reporting for similar change.

5. A method as claimed in claim 4 , wherein the change in activation status comprises activation or deactivation of the secondary cell.

6. A method as claimed in claim 4 , wherein the at least one device communicates via at least one of a long-term evolution of the Universal Mobile Telecommunications System radio, an Industrial, Scientific and Medical radio, a local wireless access radio, short range link radio, a satellite system radio, and a positioning system radio.

7. An apparatus comprising at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to

perform operations for a device with coexisting radios, wherein for carrier aggregation one radio connects to a primary cell and another radio connects to a secondary cell, the operations comprising:

determine a change in the activation status of the secondary cell,

determine interference information to be reported in response to the determined change in the activation status of the secondary cell, wherein the interference information comprises in-device coexistence interference information,

compare the determined interference information to be reported to interference information reported previously for a similar change in the activation status of the secondary cell,

decide whether to send the determined interference information based on the comparison, and

decide to send and send the determined interference information in response to the change in the activation status only when there is different information content to be reported compared to previous reporting for a similar change, wherein the determined interference information is for use by the network element for control of the device for carrier aggregation.

8. An apparatus as claimed in claim 7 , wherein the change in activation status comprises activation or deactivation of the secondary cell.

9. An apparatus as claimed in claim 7 , wherein the device is adapted to communicate via at least one of a long-term evolution of the Universal Mobile Telecommunications System radio, an Industrial, Scientific and Medical radio, a local wireless access radio, short range link radio, a satellite system radio, and a positioning system radio.

10. A user equipment comprising an apparatus as claimed in claim 7 .

11. An apparatus comprising at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to

perform operations in a network entity for control for carrier aggregation of at least one device with coexisting radios, wherein for carrier aggregation one radio of the at least one device connects to a primary cell and another radio of the at least one device connects to a secondary cell, the operations comprising

store interference information received from the at least one device in response to a change in the activation status of a secondary cell, wherein the interference information comprises in-device coexistence interference information,

determine, after the storing, a new change in the activation status of the secondary cell,

determine whether new interference information is reported in response to the new change in the activation status of the secondary cell, and

use the stored interference information in the control of the at least one device for carrier aggregation in response to a determination that no new interference information is received subsequent to the new change in the activation status of the secondary cell, and wherein interference information is reported in response to the change in the activation status only when there is different information content to be reported compared to previous reporting for similar change.

12. A base station comprising an apparatus according claim 11 .

13. A base station as claimed in claim 12 , comprising an evolved Node B.

14. A computer program product comprising a non-transitory computer medium comprising program code adapted to cause a data processing apparatus to perform the method of claim 1 when the program is run on the data processing apparatus.

15. A computer program product comprising a non-transitory computer medium comprising program code adapted to cause a data processing apparatus to perform the method of claim 4 when the program is run on the data processing apparatus.