Throughput Estimation Device

1. A throughput estimation device comprising: a wireless link quality information acquisition unit for acquiring wireless link quality information denoting a quality of a wireless link established between a mobile station and a base station on a mobile communication network; a throughput estimation unit for estimating a throughput which is the amount for the mobile station to receive per unit time a data sent by a transmitting device connected communicably with the mobile station via the wireless link, based on the acquired wireless link quality information; wherein the throughput estimation unit is configured to estimate the throughput based on a mathematical model denoting a relationship between the throughput and the wireless link quality information, and on the acquired wireless link quality information; and wherein the mathematical model is constructed by assuming equality between the throughput and a polynomial function with the wireless link quality information as a variable.

2. The throughput estimation device according to claim 1 , wherein the mathematical model is constructed by assuming equality between the throughput and a linear function with the wireless link quality information as a variable.

3. The throughput estimation device according to claim 1 , further comprising a transmission rate acquisition unit for acquiring a transmission rate which is the amount of the data sent by the transmitting device to the mobile station per unit time, wherein the throughput estimation unit is configured to estimate the throughput based on the mathematical model denoting the relationship between the throughput, the wireless link quality information and the transmission rate, on the acquired transmission rate, and on the acquired wireless link quality information.

4. The throughput estimation device according to claim 3 , wherein the mathematical model is expressed by an ordinary differential equation for the throughput with an inhomogeneous term of a function taking each of the transmission rate and the wireless link quality information as its variable.

5. The throughput estimation device according to claim 4 , wherein the inhomogeneous term is a product of the transmission rate and the polynomial function with the wireless link quality information as a variable.

6. The throughput estimation device according to claim 5 , wherein the inhomogeneous term is a product of the transmission rate and the linear function with the wireless link quality information as a variable.

7. The throughput estimation device according to claim 3 , wherein the mathematical model is constructed by expressing the relationship between the throughput, the wireless link quality information and the transmission rate based on a dynamic model.

8. The throughput estimation device according to claim 7 , wherein the dynamic model comprises a mobile body movable in a preset moving direction; and at least one of an elastic body deforming in the moving direction as much as the displacement of the mobile body in the moving direction, and a viscous body delaying the movement of the mobile body in the moving direction.

9. The throughput estimation device according to claim 8 , wherein the mathematical model is constructed by assuming that an external force applied to the mobile body in the moving direction is as great as in accordance with the transmission rate and the wireless link quality information, and by assuming that the throughput is the distance in the moving direction between a preset reference position and the position of the mobile body.

10. The throughput estimation device according to claim 9 , wherein the mathematical model is constructed to let the inhomogeneous term express the external force.

11. The throughput estimation device according to claim 8 , wherein the mathematical model is constructed by assuming that an elastic force generated by the elastic body is as great as the value of the displacement of the mobile body from a force-free position which is the position of the mobile body with the elastic force being zero, multiplied by an elastic coefficient which is a proportionality coefficient, and the elastic force acts in the opposite direction to the direction in which the mobile body has moved from the force-free position.

12. The throughput estimation device according to claim 8 , wherein the mathematical model is constructed by assuming that a resisting force generated by the viscous body is as great as the velocity of the mobile body moving in the moving direction, multiplied by a viscosity coefficient which is another proportionality coefficient, and the resisting force acts in the opposite direction to the direction in which the mobile body moves.

13. The throughput estimation device according to claim 1 , further comprising: a throughput acquisition unit for acquiring the throughout, and a model parameter estimation unit for estimating a model parameter for specifying the mathematical model, based on the acquired throughput and the acquired wireless link quality information.

14. The throughput estimation device according to claim 1 , wherein the wireless link quality information is a value based on a channel quality indicator (CQI).

15. The throughput estimation device according to claim 14 , wherein the wireless link quality information is a value of having put the channel quality indicator through a smoothing process.

16. A throughput estimation method comprising: acquiring wireless link quality information denoting a quality of a wireless link established between a mobile station and a base station on a mobile communication network; and estimating a throughput which is the amount for the mobile station to receive per unit time a data sent by a transmitting device connected communicably with the mobile station via the wireless link, based on the acquired wireless link quality information; wherein the throughput estimation unit is configured to estimate the throughput based on a mathematical model denoting a relationship between the throughput and the wireless link quality information, and on the acquired wireless link quality information; and wherein the mathematical model is constructed by assuming equality between the throughput and a polynomial function with the wireless link quality information as a variable.

17. The throughput estimation method according to claim 16 , wherein the throughput is estimated based on a mathematical model denoting a relationship between the throughput and the wireless link quality information, and on the acquired wireless link quality information.

18. The throughput estimation method according to claim 17 , wherein the mathematical model is constructed by assuming equality between the throughput and a polynomial function with the wireless link quality information as a variable.

19. The throughput estimation method according to claim 17 , further comprising acquiring a transmission rate which is the amount of the data sent by the transmitting device to the mobile station per unit time, wherein the throughput is estimated based on the mathematical model denoting the relationship between the throughput, the wireless link quality information and the transmission rate, on the acquired transmission rate, and on the acquired wireless link quality information.

20. A non-transitory computer-readable medium storing a throughput estimation computer program comprising instructions for causing an information processing device to carry out a process comprising the steps of: acquiring wireless link quality information denoting a quality of a wireless link established between a mobile station and a base station on a mobile communication network; and estimating a throughput which is the amount for the mobile station to receive per unit time a data sent by a transmitting device connected communicably with the mobile station via the wireless link, based on the acquired wireless link quality information; wherein the throughput estimation unit is configured to estimate the throughput based on a mathematical model denoting a relationship between the throughput and the wireless link quality information, and on the acquired wireless link quality information; and wherein the mathematical model is constructed by assuming equality between the throughput and a polynomial function with the wireless link quality information as a variable.

21. The non-transitory computer-readable medium storing the throughput estimation computer program according to claim 20 , wherein it is configured to cause the information processing device to carry out the process of estimating the throughput based on a mathematical model denoting a relationship between the throughput and the wireless link quality information, and on the acquired wireless link quality information.

22. The non-transitory computer-readable medium storing the throughput estimation computer program according to claim 21 , wherein the mathematical model is constructed by assuming equality between the throughput and a polynomial function with the wireless link quality information as a variable.

23. The non-transitory computer-readable medium storing the throughput estimation computer program according to claim 21 , wherein it is configured to cause the information processing device to carry out the process further comprising the step of acquiring a transmission rate which is the amount of the data sent by the transmitting device to the mobile station per unit time, and estimating the throughput based on the mathematical model denoting the relationship between the throughput, the wireless link quality information and the transmission rate, on the acquired transmission rate, and on the acquired wireless link quality information.