Controlling transfer of data

1. An apparatus for controlling transfer of data to and from a vehicle, the apparatus comprising a control means configured to:

determine a state of charge of an energy storage means of the vehicle that is required at the end of a period in which charging of the energy storage means by a charging means external to the vehicle is performable;

predict a state of charge of the energy storage means at the end of the period if a transfer of data were to be performed;

enable the transfer of data to be performed during the period based on the predicted state of charge of the energy storage means at the end of the period being greater than or equal to the state of charge required at the end of the period;

determine an estimate of an increase in the state of charge of the energy storage means by charging the energy storage means during the period in which charging from an external charging device means is performable;

receive a signal indicative of the current state of charge of the energy storage means;

determine a delay period in dependence on the estimated increase in the state of charge of the energy storage means by charging; and

postpone, by the delay period, the start of the required data transfer.

2. The apparatus according to claim 1 , wherein the control means is further configured to determine an estimate of charge required to perform a transfer of data, and predict the state of charge based on the estimate of charge required to perform a transfer of data.

3. The apparatus according to claim 1 , wherein the control means is further configured to enable a transfer of a portion of data awaiting transfer based on a predicted state of charge of the energy storage means at the end of the period, if a transfer of all data awaiting transfer were performed, being less than the determined state of charge required at the end of the period.

4. The apparatus according to claim 1 , wherein the control means is further configured to:

control transfer of data that comprises a plurality of sets of data, an estimated charge being associated with each said set for transferring the data of that set; and

cause the required transfer of data to be performed by causing one or more of the sets to be transferred based on the estimated charge required to transfer the data of the one or more sets.

5. The apparatus according to claim 1 , wherein the control means is further configured to:

control transfer of data comprising a plurality of sets of data, an estimated charge for transferring the data of a set being associated with each said set, and a priority rating being associated with each said set; and

cause the required transfer of data to be performed by causing one or more of the sets to be transferred based on the estimated charge required to transfer the data of the one or more sets and the priority rating of the one or more sets.

6. The apparatus according to claim 1 , wherein the control means is further configured to determine a predicted duration of the period in which charging of an energy storage means of the vehicle by an external charging means is performable.

7. The apparatus according to claim 1 , wherein the control means is further configured to:

determine a delay period based on the required state of charge; and

postpone, by the delay period, the start of the required data transfer.

8. The apparatus according to claim 1 , wherein the control means is further configured to determine the estimated charge required to perform the transfer of data based on either or both the quantity of data to be transferred and a rate of data transfer.

9. The apparatus according to claim 1 , wherein the control means is further configured to determine the estimated charge required to perform the transfer of data based on a known power consumption of one or more electronic units required to be active during the transfer.

10. The apparatus according to claim 1 , wherein the predicted state of charge of the energy storage means at the end of the period is based on an estimate of increase in charge by charging the energy storage means during the period.

11. The apparatus according to claim 1 , wherein the control means comprises at least one electronic processor and at least one electronic memory device coupled to the electronic processor and having instructions stored therein.

12. A system comprising the apparatus of claim 1 and a communication means for transmitting and receiving a signal comprising the data.

13. A vehicle comprising the apparatus of claim 1 .

14. A vehicle comprising the system of claim 12 .

15. A method of transferring data, the method comprising:

determining a state of charge of an energy storage means of a vehicle that is required at the end of a period in which charging of the energy storage means by a charging means external to the vehicle is performable;

predicting a state of charge of the energy storage means at the end of the period if a transfer of data were to be performed;

enabling the transfer of data to be performed during the period based on the predicted state of charge of the energy storage means at the end of the period being greater than or equal to the state of charge required at the end of the period;

determining an estimate of an increase in the state of charge of the energy storage means by charging the energy storage means during the period in which charging from an external charging device means is performable;

receiving a signal indicative of the current state of charge of the energy storage means;

determining a delay period in dependence on the estimated increase in the state of charge of the energy storage means by charging; and

postponing, by the delay period, the start of the required data transfer until.

16. The method according to claim 15 , comprising determining an estimate of charge required to perform the transfer of data; and predicting the state of charge at the end of the period in dependence on the estimate of charge required to perform the transfer of data.

17. The method according to claim 15 , wherein data required to be transferred comprises a plurality of sets of data, an estimated charge being associated with each said set for transferring the data of that set, and said enabling the required transfer of data to be performed comprises causing one or more of the sets to be transferred based on the estimated charge required to transfer the data of the one or more sets.

18. The method according to claim 15 , further comprising determining a predicted duration of the period in which charging of an energy storage means of the vehicle by an external charging means is performable, wherein the predicted state of charge of the energy storage means at the end of the period is based on an estimate of increase in charge by charging the energy storage means during the period.

19. A computer program which when executed on a processor causes the processor to perform the method of claim 15 .

20. A non-transitory computer-readable storage medium having instructions stored therein which when executed on a processor cause the processor to perform the method of claim 15 .