COMMUNICATING INFORMATION RELATING TO IN-DEVICE COEXISTENCE INTERFERENCE

1 . A method comprising:

calculating, by a user equipment, a parameter based on a power of in-device coexistence (IDC) interference; and

sending, by the user equipment to a network node, the parameter for use in configuring a threshold relating to the IDC interference.

2 . The method of claim 1 , wherein calculating the parameter is triggered by the user equipment or the network node.

3 . The method of claim 1 , further comprising:

calculating, by the user equipment, a second, different parameter based on the power of IDC interference; and

sending, by the user equipment to the network node, the second parameter for use in configuring the threshold.

4 . The method of claim 1 , wherein calculating the parameter comprises calculating a parameter based on a ratio between the power of IDC interference and a desired signal power.

5 . The method of claim 1 , wherein calculating the parameter comprises calculating a differential parameter that is based on a signal to interference and noise ratio (SINR) without IDC interference and a ratio between the power of IDC interference and a desired signal power.

6 . The method of claim 5 , further comprising sending, by the user equipment to the wireless access network node, a difference between an SINR without IDC interference and an end value of a range of SINR values for a corresponding adaptive modulation and coding scheme,

wherein the difference is useable by the wireless access network node to determine the ratio between the power of IDC interference and the desired signal power.

7 . The method of claim 5 , wherein the differential parameter and an end value of a range of SINR values for a corresponding modulation and coding scheme are useable by the wireless access network node to determine the ratio between the power of IDC interference and the desired signal power.

8 . The method of claim 1 , wherein calculating the parameter comprises calculating a threshold based on a difference between an SINR with IDC interference and an SINR without IDC interference.

9 . The method of claim 1 , wherein calculating the parameter comprises calculating a threshold based on a difference between an SINR without IDC interference and a ratio between the power of the IDC interference and a desired signal power.

10 . The method of claim 1 , wherein calculating the parameter comprises calculating a parameter based on a ratio between the power of the IDC interference and an aggregate of neighbor cell interference power and noise power.

11 . The method of claim 1 , wherein calculating the parameter comprises calculating a first value of the parameter, and wherein sending the parameter is in response to the first value having a predefined relationship with respect to a feedback reporting threshold.

12 . The method of claim 11 , further comprising:

calculating a second value of the parameter;

determining that the second value of the parameter does not have the predefined relationship with respect to the feedback reporting threshold; and

sending an IDC indication in response to determining that the second value of the parameter does not have the predefined relationship with respect to the feedback reporting threshold.

13 . A user equipment comprising:

a wireless interface configured to communicate with a wireless access network node; and

at least one processor configured to:

identify a traffic pattern from among a plurality of traffic patterns that cause in-device coexistence (IDC) interference; and

trigger transmission of an indication of IDC interference using a criterion selected from among different criteria for the corresponding traffic patterns.

14 . The user equipment of claim 13 , wherein the at least one processor is configured to trigger the transmission of the indication in response to the IDC interference being greater than a threshold for IDC interference mitigation, if the identified traffic pattern is uniform.

15 . The user equipment of claim 14 , wherein the at least one processor is configured to trigger the transmission of the indication at a beginning of the uniform traffic pattern.

16 . The user equipment of claim 14 , wherein the threshold is constant over a duration of the uniform traffic pattern.

17 . The user equipment of claim 14 , wherein the threshold is variable with respective modulation and coding schemes used by the user equipment.

18 . The user equipment of claim 13 , wherein the identified traffic pattern is a non-uniform traffic pattern, and wherein the at least one processor is configured to trigger the transmission of the indication in response to determining that an amount of time that the IDC interference is greater than a threshold for IDC interference mitigation exceeds a time duration threshold.

19 . The user equipment of claim 18 , wherein the time duration threshold is based on a configurable fraction parameter.

20 . The user equipment of claim 19 , wherein the time duration threshold is further based on a configurable reference time duration.

21 . The user equipment of claim 20 , wherein the fraction parameter and the reference time duration are configurable by the user equipment or the wireless access network node.

22 . The user equipment of claim 13 , wherein the transmission of the indication of IDC interference is based at least in part on determining that the IDC interference exceeds a threshold for IDC interference mitigation, and wherein the determining of whether the IDC interference exceeds the threshold is performed in time intervals that exclude time durations due to time selectivity of wireless channels.

23 . A network node comprising:

a wireless interface configured to communicate with a user equipment; and

at least one processor configured to:

receive a feedback parameter from the user equipment, wherein the feedback parameter is based on a signal to interference and noise ratio (SINR) measurement;

derive a threshold for in-device coexistence (IDC) interference mitigation based on the feedback parameter; and

send the threshold to the user equipment.

24 . The network node of claim 23 , wherein the threshold is an exact threshold to be used by the user equipment.

25 . The network node of claim 23 , wherein the threshold is a threshold guideline useable by the user equipment to set a threshold to use.

26 . The network node of claim 25 , wherein the threshold guideline includes a range of thresholds.

27 . The network node of claim 25 , wherein the threshold guideline includes a collection of candidate thresholds.

28 . The network node of claim 23 , wherein the at least one processor is further configured to send a request to trigger derivation of the feedback parameter at the user equipment.