Adaptation of mobility parameters based on user equipment measurement availability

1. A method, comprising:

determining at least one of measurement rate or measurement availability; and

adapting at least one of an event triggering or a measurement filtering, depending on at least one of the measurement rate or the measurement availability,

wherein the determining comprises monitoring availability based on at least one of previously observed measurement activity, known or predicted near-future measurement availability, a number of measurement opportunities during a certain time window, a number of active subframes the user equipment has had during at least one previous discontinuous reception cycle or predetermined time window and configured discontinuous reception parameters.

2. The method of claim 1 , wherein the adapting is performed when the measurement rate is at least one of above a first threshold and below a second threshold, when the measurement availability is at least one of above a first threshold and below a second threshold, or when both the measurement rate and the measurement availability are at least one of above a first threshold and below a second threshold.

3. The method of claim 1 , wherein the determining comprises at least one of: determining a number of a plurality of measurements available for making a handover decision and determining a number of a plurality of measurements available for evaluating an event triggering condition that may cause a report to be sent from a user equipment.

4. The method of claim 1 , further comprising:

measuring the number of the plurality of measurements available over at least one of a fixed time duration or one or more discontinuous reception cycles.

5. The method of claim 1 , wherein the adapting comprises adapting at least one of a filtering value, a filter length, a filter coefficient, a measurement report trigger value, a threshold time to trigger value, or a hysteresis value.

6. The method of claim 1 , wherein the adapting comprises at least one of: adapting autonomously; adapting under guidance of a network, selecting between predetermined sets of parameters and adapting the event triggering depending on a currently applied discontinuous reception status or configuration.

7. The method of claims 1 , wherein the event triggering comprises at least one of: triggering a handover and sending from a user equipment a measurement report or other signaling based on an event condition being fulfilled.

8. The method of claim 1 , wherein the adapting the event triggering is further be based on at least one of the user equipment having a lower number of measurements available for mobility evaluation per time period than a given threshold, the user equipment applying discontinuous reception longer than a given threshold, the user equipment being in a low mobility state, the user equipment being in a high mobility, the user equipment being slow moving and the user equipment being fast moving.

9. A method, comprising:

adapting one or more mobility parameters based on measurement availability or measurement rate; and

communicating the rules or adaptations to the rules to a user equipment,

wherein the adapting one or more mobility parameters based on measurement availability or measurement rate comprises adapting at least one mobility parameter by selecting between predetermined sets of parameters.

10. The method of claim 9 , further comprising at least one of:

configuring the rules by which the adaptation is done at least one of monitoring, predicting measurement availability and measurement rate for the user equipment; and receiving measurement information from the user equipment.

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 to, with the at least one processor, cause the apparatus at least to

determine at least one of measurement rate and measurement availability; and

adapt at least one of an event triggering and a measurement filtering depending on at least one of the measurement rate and the measurement availability,

wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to determine the at least one of measurement rate and measurement availability by at least monitoring availability based on at least one of previously observed measurement activity, known or predicted near-future measurement availability, a number of measurement opportunities during a certain time window, a number of active subframes the user equipment has had during at least one previous discontinuous reception cycle or predetermined time window and configured discontinuous reception parameters.

12. The apparatus of claim 11 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform the adapting when at least one of the measurement rate and the measurement availability is at least one of above a first threshold and below a second threshold.

13. The apparatus of claim 11 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to determine a number of a plurality of measurements available for at least one of making a handover decision and evaluating an event triggering condition that may cause a report to be sent from a user equipment.

14. The apparatus of claim 11 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to measure the number of the plurality of measurements available over at least one of a fixed time duration and at least one discontinuous reception cycle.

15. The apparatus of claim 11 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to filter measurements depending on the amount of available measurements per time window.

16. 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 to, with the at least one processor, cause the apparatus at least to

adapt one or more mobility parameters based on measurement availability or measurement rate; and

communicate the rules or adaptations to the rules to a user equipment,

wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to adapt at least one mobility parameter by selecting between predetermined sets of parameters.

17. A non-transitory computer-readable medium encoded with instructions that, when executed in hardware, perform a process, the process comprising the method of claim 1 .

18. A system comprising:

a first apparatus comprising adapting means for adapting one or more mobility parameters based on measurement availability or measurement rate and communicating means for communicating the rules or adaptations to the rules to a second apparatus, wherein the adapting one or more mobility parameters based on measurement availability or measurement rate comprises adapting at least one mobility parameter by selecting between predetermined sets of parameters; and

the second apparatus comprising determining means for determining at least one of measurement rate or measurement availability and adapting means for adapting at least one of an event triggering or a measurement filtering depending on at least one of the measurement rate or the measurement availability, wherein the determining comprises monitoring availability based on at least one of previously observed measurement activity, known or predicted near-future measurement availability, a number of measurement opportunities during a certain time window, a number of active subframes the user equipment has had during at least one previous discontinuous reception cycle or predetermined time window and configured discontinuous reception parameters.