METHOD AND DEVICE FOR PREDICTING A SWITCHING STATE AND/OR A SWITCHING TIME OF A SIGNALING SYSTEM FOR TRAFFIC CONTROL

Abstract

A method predicts a switch state and/or a switch time point of a signaling system. The method includes collecting first and second state data, the first and second state data influencing the switch state and/or switch time point. The collection of the first state data includes reading of state data from a signaling system control device of the signaling system by a signaling system interface. The collection of the second state data includes reading in of the state data. A prediction model is provided and configured to make a prediction of the switch time point and/or the switch state of the signaling system based on first and second state data. The switch state and/or the switch time point of the signaling system is predicted via the prediction model using the first and second state data. The predicted switch state and/or switch time point of the signaling system is outputted.

Claims

1-25. (canceled)

26. A method for predicting a switching state and/or a switching time of a signaling system for traffic control, which comprises the following method steps of: acquiring first state data and second state data, wherein the first state data and second state data influence the switching state and/or the switching time of the signaling system, wherein acquiring the first state data includes reading out state data of a signaling system controller of the signaling system by means of a signaling system interface, wherein acquiring the second state data includes reading in state data provided via a communication interface; providing a prediction model configured to make a prediction of the switching time and/or the switching state of the signaling system depending on the first state data and second state data; predicting the switching state and/or the switching time of the signaling system by means of the prediction model on a basis of the first state data and second state data; and outputting a predicted switching state and/or switching time of the signaling system.

27. The method according to claim 26, wherein the first state data includes control data of the signaling system.

28. The method according to claim 26, which further comprises: determining a control recommendation for the signaling system on a basis of the predicted switching state and/or switching time; and outputting the control recommendation to the signaling system via the signaling system interface.

29. The method according to claim 26, which further comprises carrying out remote maintenance of the signaling system controller via the signaling system interface.

30. The method according to claim 26, wherein a second state data read in via the communication interface includes data from external sensors and/or data from internet-based third-party providers and/or data from roadside units for obtaining vehicle data.

31. The method according to claim 26, which further comprises outputting the predicted switching state and/or switching time to vehicles.

32. The method according to claim 26, which further comprises outputting a confidence interval for the predicted switching state and/or switching time.

33. The method according to claim 26, which further comprising repeating the acquiring of the first state data and/or of the second state data after a predefined time duration, wherein the predefined time duration is a maximum of five seconds.

34. The method according to claim 26, which further comprises effecting the providing of the prediction model via a central computing unit via a cloud interface.

35. The method according to claim 34, which further comprise outputting the first state data and/or the second state data to the central computing unit via the cloud interface.

36. The method according to claim 34, which further comprises receiving a termination command via the cloud interface and the outputting of the predicted switching state and/or switching time of the signaling system is ended after the termination command has been received.

37. The method according to claim 36, wherein after the termination command has been received, a resumption command is received via the cloud interface, and after the resumption command has been received, the outputting of the predicted switching state and/or switching time of the signaling system is resumed.

38. The method according to claim 26, which further comprises training the prediction model by means of the first state data and/or the second state data.

39. The method according to claim 26, wherein the prediction model is data-driven.

40. The method according to claim 26, which further comprises controlling a vehicle on a basis of the predicted switching state and/or switching time.

41. A device, comprising: a signaling system interface; a communication interface; and a computing unit configured to carry out the method according to claim 26.

42. A computer program product having computer-executable code, wherein executing the computer-executable code on a computing unit having a non-transitory computer-readable medium causes the computing unit to carry out the method according to claim 26.

43. A non-transitory computer-readable storage medium, comprising: said computer program product according to claim 42.

44. A system, comprising: said device according to claim 41; and a vehicle configured to receive the predicted switching state and/or switching time, said vehicle having a vehicle controller configured to control a vehicle movement of said vehicle on a basis of the switching state and/or switching time.

45. A method for evaluating a prediction model, which comprises the following steps of: providing a previous prediction model, the previous prediction model being output to a device via a computing unit interface; reading first state data and/or second state data into a central computing unit via the computing unit interface; comparing a switching state and/or a switching time calculated by means of the previous prediction model with an actual switching state and/or an actual switching time; and outputting a termination command via the computing unit interface if a calculated switching state and/or a calculated switching time deviates from the actual switching state and/or the actual switching time to a given extent.

46. The method according to claim 45, which further comprises subsequently training the prediction model on a basis of the first state data and/or the second state data, wherein after the prediction model has been trained, a newly trained prediction model is stored in a memory.

47. The method according to claim 46, which further comprises: performing a check to ascertain whether the newly trained prediction model is better suited to predicting the switching state and/or the switching time than the previous prediction model; outputting the newly trained prediction model and a resumption command via the computing unit interface if the newly trained prediction model is better suited to predicting the switching state and/or the switching time than the previous prediction model; and outputting the resumption command via the computing unit interface if the newly trained prediction model is worse suited to predicting the switching state and/or the switching time than the previous prediction model.

48. A central computing unit configured to carry out the method according to claim 45.

49. A computer program product, comprising program code, wherein executing the program code on a central computing unit causes said central computing unit to carry out the method according to claim 45.

50. A non-transitory computer-readable storage medium, comprising the computer program product according to claim 49.

Description

[0042] The above-described properties, features and advantages of this invention and the way in which they are achieved will become clearer and more clearly understood from the explanations of the following, greatly simplified, schematic illustrations of preferred exemplary embodiments. Here in a schematic illustration in each case:

[0043] FIG. 1 shows a flow diagram of a method according to the invention;

[0044] FIG. 2 shows a device for carrying out the method according to the invention;

[0045] FIG. 3 shows a vehicle; and

[0046] FIG. 4 shows a flow diagram of an evaluation method.

[0047] FIG. 1 shows a flow diagram 100 of a method according to the invention for predicting a switching state and/or a switching time of a signaling system. In an acquisition step 101, first state data and second state data are acquired, wherein the first state data and the second state data acquired in the acquisition step 101 influence the switching state and/or the switching time. Acquiring the first state data comprises reading out state data of a signaling system controller of the signaling system by means of a signaling system interface. Acquiring the second state data comprises reading in state data provided via a communication interface. In a subsequent provision step 102, a prediction model is provided, said prediction model being configured to make a prediction of the switching time and/or the switching state of the signaling system depending on the first state data and second state data. In a prediction step 103 subsequent thereto, the switching state and/or the switching time of the signaling system are/is predicted by means of the prediction model on the basis of the first state data and second state data. In an outputting step 104 subsequent thereto, the predicted switching state and/or switching time of the signaling system is output. FIG. 1 likewise illustrates three further optional method steps 105, 106, 107. In a control step 106, a vehicle is controlled on the basis of the predicted switching state and/or switching time of the signaling system. In a training step 105, the prediction model is trained on the basis of the acquired first state data and/or second state data. In this case, provision can be made for always carrying out this training, such that the training step 105 is carried out directly after the outputting step 104. This is indicated by means of a dashed arrow from the outputting step 104 to the training step 105. In the training step, the first state data and second state data acquired in the acquisition step 101 can be used for training the prediction model. The newly trained prediction model can then be provided in the provision step 102. Alternatively, as illustrated by means of solid arrows in FIG. 1, firstly an evaluation step 107 can be carried out, which involves evaluating whether a switching state and/or switching time calculated by means of the previous prediction model corresponds to an actual switching state and/or switching time, and the training step 105 is carried out only if this is not the case. Provision can be made here either for comparing one actual switching state and/or switching time with one calculated switching state and/or switching time or for comparing a plurality of actual switching states and/or switching times with a plurality of calculated switching states and/or switching times. For this purpose, it is possible to have recourse to the first state data and second state data acquired in the acquisition step 101.

[0048] FIG. 2 shows a device 200 for carrying out the method illustrated in FIG. 1. The device 200 comprises a computing unit 201. Furthermore, the device 200 comprises a signaling system interface 202, by which the device 200 is connected to a signaling system controller 111 of a signaling system 110. Furthermore, the device 200 comprises a plurality of communication interfaces 203. One communication interface 203 is connected to an external sensor 210. A further communication interface 203 is connected to an internet-based third-party provider 211. A further communication interface 203 is connected to a roadside unit 230. The device 200 is connected to an external central computing unit 220 via a cloud interface 204. For this purpose, the central computing unit 220 has a computing unit interface 223 and also a processor 221 and a memory 222. The connection of the communication interface 203 to the external sensor 210 is illustrated as a wired connection, as is the connection of the communication interface 203 to the roadside unit 230. The connection to the internet-based third-party provider 211 is illustrated as a radio connection. Alternatively, the communication connections of the communication interfaces 203 can each be wired or wireless, and both variants are intended in each case to be covered by the scope of protection of the invention. The communication interfaces 203 can also be embodied jointly as one communication interface, for example to the internet. The cloud interface 204 and one or more of the communication interfaces 203 can likewise be embodied as one physical interface. The roadside unit 230 is connected to a vehicle 240 by means of radio connection. Vehicle data of the vehicle 240 can thereby be forwarded to the roadside unit 230 and via the communication interface 203 to the device 200.

[0049] Acquiring the first state data in the acquisition step 101 includes reading out the first state data of the signaling system controller 111 by means of the signaling system interface 202. As a result, first state data which are available to the signaling system controller 111 for controlling the signaling system 110 can be used for predicting the switching state and/or switching time. In this case, the first state data can comprise control data of the signaling system 110 and include for example data of a signaling system detector 112 connected to the signaling system controller 111. In this case, the signaling system detector 112 can be configured to capture a traffic flow, to detect vehicles or to acquire other data in the region of the signaling system 110. The signaling system controller 111 can be configured to alter switching cycles, switching states and/or switching times of the signaling system 110 on the basis of these data of the signaling system detector 112. The control data can additionally comprise further data available to the signaling system controller 111, for example data that are provided to the signaling system controller 111 via the internet. Furthermore, the signaling system control data can also include output data such as, for example, the switching states of the signaling system 110.

[0050] Acquiring the second state data in the acquisition step 101 includes reading in second state data provided via one of the communication interfaces 203, for example from an external sensor 210 and/or the internet-based third-party provider 211 and/or the roadside unit 230.

[0051] In one exemplary embodiment, a control recommendation for the signaling system 110 is determined on the basis of the predicted switching state and/or switching time and the control recommendation is output to the signaling system 110 via the signaling system interface 202 and in particular the signaling system controller 111.

[0052] In one exemplary embodiment, remote maintenance of the signaling system controller 111 can be carried out via the signaling system interface 202.

[0053] Overall, provision can be made here for incorporating into the prediction model of the device 200 the first state data and second state data provided via the signaling system interface 202 and/or the communication interfaces 203 and for determining the predicted switching state and/or switching time on the basis of said first state data and second state data. In this case, it can be provided that the prediction model has been correspondingly trained on the basis of first state data and second state data recorded earlier or acquired earlier.

[0054] Providing the prediction model in the provision step 102 can be effected by the central computing unit 220 by means of transfer via the cloud interface 204. In this case, provision can be made for the first state data and second state data determined in the acquisition step 101 to be transferred to the central computing unit 220 via the cloud interface 204 and for the training of the prediction model to be carried out on the central computing unit 220. This makes it possible in particular to make available a lower computing power to the computing unit 220 assigned to the device 200 and to equip the central computing unit 220 with a powerful processor 221. Alternatively, the prediction model can also be trained by the computing unit 201 of the device 200.

[0055] In one exemplary embodiment, by means of the device 200, a termination command is received via the cloud interface 204 and the outputting of the predicted switching state and/or switching time of the signaling system 110 is ended after the termination command has been received. In one exemplary embodiment, after the termination command has been received, a resumption command is received via the cloud interface 204, and after the resumption command has been received, the outputting of the predicted switching state and/or switching time of the signaling system 110 is resumed.

[0056] In one exemplary embodiment, the predicted switching state and/or switching time is output to a vehicle 240 in the outputting step 104. This can be effected for example via the roadside unit 230, but also via other communication paths.

[0057] In one exemplary embodiment, a confidence interval for the predicted switching state and/or switching time is likewise concomitantly output in the outputting step 104, as a result of which additional information about the prediction quality is available.

[0058] In one exemplary embodiment, acquiring the first state data and/or second state data is effected in the acquisition step 101 and is repeated after a predefined time duration. In this case, provision can be made for the predefined time duration to be a maximum of five seconds, preferably a maximum of one second, and in particular preferably a maximum of one tenth of a second. As a result, sufficiently accurate state data, or state data with a sufficiently good temporal resolution, are available and can be used to carry out the prediction step 103. Furthermore, the good temporal resolution of the state data can be helpful during the training of the prediction model.

[0059] In one exemplary embodiment, the prediction model is data-driven. In this case, the data-driven prediction model can be embodied in particular as a neural network.

[0060] A computer program, comprising program code, runs on the computing unit 201 of the device 200, wherein executing the program code causes the computing unit 201 to carry out the method according to the invention.

[0061] The signaling system interface 202, the communication interfaces 203 and the cloud interface 204 are illustrated as individual interfaces in each case in FIG. 2, but can be embodied as a single interface. It can be provided that the signaling system interface 202 serves to assign the device 200 to the signaling system controller 111 of an existing signaling system 110 and thus constitutes a cost-effective possibility for assigning a device for making a switching time and/or switching state prediction to the signaling system 110. As a result, existing road infrastructure can be adapted to the existing communication requirements in a cost-effective manner.

[0062] FIG. 3 shows a vehicle 240 having a vehicle communication interface 241, a vehicle computing unit 242 and also a device for performing a driving function 243 in an automated manner, and a display device 244. In this case, the device for performing a driving function 243 in an automated manner and the display device 244 can both be provided or provision can be made for omitting one of the two devices. The predicted switching state and/or switching time can be output via the display device 244 and thus made available to a driver of the vehicle 240. A vehicle movement of the vehicle 240 can be controlled by way of the device for performing a driving function 243 in an automated manner, wherein the vehicle movement can comprise a steering movement and/or an acceleration of the vehicle 240. In this case, acceleration once again encompasses an increase but also a decrease in a vehicle velocity of the vehicle 240.

[0063] The invention likewise comprises a system consisting of the device 200 from FIG. 2 and the vehicle 240 from FIG. 3.

[0064] FIG. 4 shows a flow diagram 300 of a method for evaluating a prediction model. In a provision step 301, a previous prediction model is provided, wherein the previous prediction model is output to a device 200 via a computing unit interface 223. In a read-in step 302 subsequent thereto, first state data and/or second state data are read into a central computing unit 220 via the computing unit interface 223. In a subsequent comparison step 303, a switching state and/or switching time calculated by the means of the previous prediction model is compared with an actual switching state and/or switching time. Subsequently thereto, in an outputting step 304, a termination command is output via the computing unit interface 223 if the calculated switching state and/or switching time deviates from the actual switching state and/or switching time to an excessively great extent.

[0065] In one exemplary embodiment, not just one calculated switching state and/or switching time is compared with one actual switching state and/or switching time, rather a plurality of actual switching states and/or switching times are compared with a plurality of calculated switching states and/or switching times.

[0066] FIG. 4 likewise illustrates an optional training step 305. In the training step 305, the prediction model is trained on the basis of the first state data and/or second state data, wherein after the prediction model has been trained, a newly trained prediction model is stored in the memory 222. An optional checking step 306 is additionally provided, in which a check is made to ascertain whether the newly trained prediction model is better suited to predicting the switching state and/or switching time than the previous prediction model. Subsequently, in the checking step, either the newly trained prediction model and a resumption command are output via the computing unit interface 223 if the trained prediction model is better suited to predicting the switching state and/or switching time than the previous prediction model, or a resumption command is output via the computing unit interface 223 if the trained prediction model is worse suited to predicting the switching state and/or switching time than the previous prediction model.

[0067] A computer program, comprising program code, runs on the central computing unit 220, wherein executing the program code causes the computing unit 220 to carry out the method illustrated in FIG. 4.

[0068] Although the invention has been explained in greater detail on the basis of preferred exemplary embodiments, it is not restricted to them. In particular, a person skilled in the art can effect combinations of the features shown, without departing from the scope of protection of the invention.