Radio parameter control apparatus, radio base station, radio parameter control method, and non-transitory computer readable medium

1. A radio parameter control apparatus comprising:

a radio quality prediction unit that predicts radio quality of a radio terminal due to change of a radio parameter of a radio cell, wherein the radio quality prediction unit predicts the radio quality of the radio terminal due to the change of the radio parameter using measurement results of the radio quality reported from the radio terminal before the change of the radio parameter is carried out;

a resource-allocated number-of-communications prediction unit that predicts the number of communications considered as allocation targets of radio resources in a radio cell due to the change of the radio parameter;

a communication quality prediction unit that predicts communication quality due to the change of the radio parameter based on a prediction result of the radio quality and a prediction result of the number of communications; and

a radio parameter decision unit that decides a radio parameter by which improvement of communication quality is predicted based on the predicted communication quality.

2. The radio parameter control apparatus according to claim 1 , wherein the communication quality prediction unit carries out prediction of the communication quality using at least one of the measurement results of the radio quality.

3. The radio parameter control apparatus according to claim 1 , wherein the communication quality prediction unit predicts that a radio cell to which a radio terminal connects is changed by the change of the radio parameter.

4. The radio parameter control apparatus according to claim 1 , wherein the number of communications considered as the allocation targets of the radio resources is the number of radio terminals considered as allocation targets of radio resources.

5. The radio parameter control apparatus according to claim 1 , wherein the number of communications considered as the allocation targets of the radio resources is the number of bearers considered as allocation targets of radio resources.

6. The radio parameter control apparatus according to claim 1 , wherein the resource-allocated number-of-communications prediction unit predicts the number of communications considered as the allocation targets of the radio resources based on the number of communications in a previously set timing.

7. The radio parameter control apparatus according to claim 6 , wherein the resource-allocated number-of-communications prediction unit averages the number of communications in a plurality of the previously set timings collected for a predetermined period, and predicts the number of communications considered as the allocation targets of the radio resources based on the averaged number of communications.

8. The radio parameter control apparatus according to claim 7 , wherein a period when there does not exist any communications considered as the allocation targets of the radio resources is excluded from targets of average processing in the number of communications in the previously set timings being averaged.

9. The radio parameter control apparatus according to claim 1 , wherein the radio parameter is a transmission power.

10. The radio parameter control apparatus according to claim 1 , wherein the communication quality is a throughput.

11. The radio parameter control apparatus according to claim 10 , wherein

the radio quality prediction unit predicts an SINR measured by the radio terminal due to the change of the radio parameter, and

the communication quality prediction unit predicts a throughput using the SINR, and a correspondence table of the SINR and the throughput or the SINR and Shannon's formula.

12. The radio parameter control apparatus according to claim 1 , wherein the radio parameter decision unit selects a radio parameter by which at least either one of an average value of a plurality of the communication quality and a specific communication quality value extracted from a plurality of the communication quality is improved.

13. The radio parameter control apparatus according to claim 1 , further comprising quality deterioration detection unit for detecting quality deterioration of a radio cell, wherein the radio parameter decision unit decides the radio parameter after detection of the quality deterioration.

14. The radio parameter control apparatus according to claim 13 , wherein when the quality deterioration is detected after applying the decided radio parameter, the radio parameter decision unit resets the decided radio parameter to a radio parameter applied before, or applies another radio parameter by which improvement of communication quality is predicted.

15. The radio parameter control apparatus according to claim 1 , wherein the radio parameters are decided regarding a plurality of radio cells, and a radio cell by which the predicted communication quality is improved is selected as a target radio cell for which a radio parameter is changed.

16. A radio base station comprising:

a radio quality prediction unit that predicts radio quality of a radio terminal due to change of a radio parameter of a radio cell, wherein the radio quality prediction unit predicts the radio quality of the radio terminal due to the change of the radio parameter using measurement results of the radio quality reported from the radio terminal before the change of the radio parameter is carried out;

a resource-allocated number-of-communications prediction unit that predicts the number of communications considered as allocation targets of radio resources in a radio cell due to the change of the radio parameter;

a communication quality prediction unit that predicts communication quality due to the change of the radio parameter based on a prediction result of the radio quality and a prediction result of the number of communications; and

a radio parameter decision unit that decides a radio parameter by which improvement of communication quality is predicted based on the predicted communication quality.

17. The radio base station according to claim 16 , wherein the communication quality prediction unit carries out prediction of the communication quality using at least one of the measurement results of the radio quality.

18. The radio base station according to claim 16 , wherein the communication quality prediction unit predicts that a radio cell to which a radio terminal connects is changed by the change of the radio parameter.

19. The radio base station according to claim 16 , wherein the number of communications considered as the allocation targets of the radio resources is the number of radio terminals considered as allocation targets of radio resources.

20. The radio base station according to claim 16 , wherein the number of communications considered as the allocation targets of the radio resources is the number of bearers considered as allocation targets of radio resources.

21. The radio base station according to claim 16 , wherein the resource-allocated number-of-communications prediction unit predicts the number of communications considered as the allocation targets of the radio resources based on the number of communications in a previously set timing.

22. The radio base station according to claim 21 , wherein the resource-allocated number-of-communications prediction unit averages the number of communications in a plurality of the previously set timings collected for a predetermined period, and predicts the number of communications considered as the allocation targets of the radio resources based on the averaged number of communications.

23. The radio base station according to claim 22 , wherein a period when there does not exist any communications considered as the allocation targets of the radio resources is excluded from targets of average processing in the number of communications in the previously set timings being averaged.

24. The radio base station according to claim 16 , wherein the radio parameter is a transmission power.

25. The radio base station according to claim 16 , wherein the communication quality is a throughput.

26. The radio base station according to claim 25 , wherein

the radio quality prediction unit predicts an SINR measured by the radio terminal due to the change of the radio parameter, and

the communication quality prediction unit predicts a throughput using the SINR, and a correspondence table of the SINR and the throughput or the SINR and Shannon's formula.

27. The radio base station according to claim 16 , wherein the radio parameter decision unit selects a radio parameter by which at least either one of an average value of a plurality of the communication quality and a specific communication quality value extracted from a plurality of the communication quality is improved.

28. The radio base station according to claim 16 , further comprising quality deterioration detection unit for detecting quality deterioration of a radio cell, wherein the radio parameter decision unit decides the radio parameter after detection of the quality deterioration.

29. The radio base station according to claim 28 , wherein when the quality deterioration is detected after applying the decided radio parameter, the radio parameter decision unit resets the decided radio parameter to a radio parameter applied before, or applies another radio parameter by which improvement of communication quality is predicted.

30. The radio base station according to claim 16 , wherein the radio parameters are decided regarding a plurality of radio cells, and a radio cell by which the predicted communication quality is improved is selected as a target radio cell for which a radio parameter is changed.

31. A radio parameter control method, wherein

predicting radio quality of a radio terminal due to change of a radio parameter of a radio cell wherein the radio quality of the radio terminal due to the change of the radio parameter is predicted using measurement results of the radio quality reported from the radio terminal before the change of the radio parameter is carried out,

predicting the number of communications considered as allocation targets of radio resources in a radio cell due to the change of the radio parameter,

predicting communication quality due to the change of the radio parameter based on a prediction result of the radio quality and a prediction result of the number of communications, and

deciding a radio parameter by which improvement of communication quality is predicted based on the predicted communication quality.

32. The radio parameter control method according to claim 31 , wherein the prediction of the communication quality is carried out using at least one of the measurement results of the radio quality.

33. The radio parameter control method according to claim 31 , wherein in the prediction of the communication quality, it is predicted that a radio cell to which a radio terminal connects is changed by the change of the radio parameter.

34. The radio parameter control method according to claim 31 , wherein the number of communications considered as the allocation targets of the radio resources is the number of radio terminals considered as the allocation targets of radio resources.

35. The radio parameter control method according to claim 31 , wherein the number of communications considered as the allocation targets of the radio resources is the number of bearers considered as allocation targets of radio resources.

36. The radio parameter control method according to claim 31 , wherein in the prediction of the number of communications, the number of communications considered as the allocation targets of the radio resources is predicted based on the number of communications in a previously set timing.

37. The radio parameter control method according to claim 36 , wherein in the prediction of the number of communications, the number of communications in a plurality of the previously set timings collected for a predetermined period is averaged, and the number of communications considered as the allocation targets of the radio resources is predicted based on the averaged number of communications.

38. The radio parameter control method according to claim 37 , wherein a period when there do not exist any communications considered as the allocation targets of the radio resources is excluded from targets of average processing in the number of communications in the previously set timings being averaged.

39. The radio parameter control method according to claim 31 , wherein the radio parameter is a transmission power.

40. The radio parameter control method according to claim 31 , wherein the communication quality is a throughput.

41. The radio parameter control method according to claim 40 , wherein

in the prediction of the radio quality, predicting an SINR measured by the radio terminal due to the change of the radio parameter, and

in the prediction of the communication quality, predicting a throughput using the SINR, and a correspondence table of the SINR and the throughput or the SINR and Shannon's formula.

42. The radio parameter control method according to claim 31 , wherein in the decision of the radio parameter, selecting a radio parameter by which at least either one of an average value of a plurality of the communication quality and a specific communication quality value extracted from a plurality of the communication quality is improved.

43. The radio parameter control method according to claim 31 , wherein before the radio quality is predicted, quality deterioration of a radio cell is detected, and the radio parameter is decided in after the detection of the quality deterioration.

44. The radio parameter control method according to claim 31 , wherein when quality deterioration of a radio cell is detected after the decided radio parameter is applied and the quality deterioration is detected, the decided radio parameter is reseted to a radio parameter applied before, or another radio parameter is applied by which improvement of communication quality is predicted.

45. The radio parameter control method according to claim 31 , wherein the radio parameters are decided regarding a plurality of radio cells, and a radio cell by which the predicted communication quality is improved is selected as a target radio cell for which a radio parameter is changed.

46. A non-transitory computer readable medium having stored therein a program that makes a computer execute the steps of:

predicting radio quality of a radio terminal due to change of a radio parameter of a radio cell, wherein the radio quality of the radio terminal due to the change of the radio parameter is predicted using measurement results of the radio quality reported from the radio terminal before the change of the radio parameter is carried out;

predicting the number of communications considered as allocation targets of radio resources in a radio cell due to the change of the radio parameter;

predicting communication quality due to the change of the radio parameter based on a prediction result of the radio quality and a prediction result of the number of communications; and

deciding a radio parameter by which improvement of communication quality is predicted is decided based on the predicted communication quality.