JP4838851B2 - Resource management apparatus, resource management method, resource management program, and computer-readable recording medium - Google Patents

Description

  The present invention relates to a resource management apparatus, a resource management method, a resource management program, and a computer-readable recording medium for managing resources used for executing functions related to vehicle travel. However, the use of the present invention is not limited to the above-described resource management apparatus, resource management method, resource management program, and computer-readable recording medium.

  Conventionally, navigation devices have come to adopt various functions in addition to normal functions such as route search and route guidance, and one of them includes a safety support function. Many navigation safety support functions and car safety support functions are implemented by signal processing by a CPU or DSP. In recent years, functions that require processing with a high signal processing load using images and videos have been increasing. If dedicated hardware resources are installed for each of these functions, the functions can be implemented without interrupting the process, but in order to make effective use of hard resources, resources are often shared with other functions ( For example, see the following Patent Document 1.)

JP 2004-61228 A

  However, when resources are shared and used by using a CPU or DSP that is common to other functions, when many functions are operated simultaneously, each function places a load on the resources. Therefore, in some cases, there may be a shortage of resources. In particular, even when trying to operate the safety support function, there will be a shortage of resources, the safety support function will not be able to operate, and it may be in a dangerous state during driving. Is given as an example.

  The resource management apparatus according to the first aspect of the present invention includes a selection unit that selects a function related to traveling of a vehicle, which is executed by using one or more devices, and a function selected by the selection unit. A change unit that changes a function selected by the selection unit to another alternative function when the amount of resources used when executing a plurality of functions exceeds a limit range in any device. The changing means determines a function to be canceled according to a predetermined priority when the resource amount exceeds a limit range in any device regardless of which alternative function is used.

  In addition, the resource management method according to the invention of claim 8 is performed by using one or a plurality of devices, and is selected by a selection step of selecting a function related to traveling of the vehicle, and the selection step. A change step of changing the function selected by the selection step to another alternative function when the amount of resources used when executing a plurality of functions including the function exceeds a limit range in any device; And the changing step determines a function to be canceled in accordance with a predetermined priority when the resource amount exceeds a limit range in any device regardless of which alternative function is used.

  According to a ninth aspect of the present invention, a resource management program causes a computer to execute the resource management method according to the eighth aspect.

  According to a tenth aspect of the present invention, a computer-readable recording medium records the resource management program according to the ninth aspect.

It is a block diagram which shows the functional structure of the resource management apparatus concerning embodiment of this invention. It is a flowchart which shows the process of the resource management method concerning embodiment of this invention. It is a block diagram which shows the hardware constitutions of a navigation apparatus. It is explanatory drawing explaining the resource amount of each device in the case of using an alternative function. It is explanatory drawing explaining the resource amount of each device in the case of using each function. It is a flowchart explaining a resource management process.

  Exemplary embodiments of a resource management device, a resource management method, a resource management program, and a computer-readable recording medium according to the present invention will be explained below in detail with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing a functional configuration of a resource management apparatus according to an embodiment of the present invention. The resource management apparatus according to this embodiment includes a selection unit 101, a change unit 102, a setting unit 103, and a re-change unit 104. Each of these configurations is realized by using a CPU 301, a ROM 302, and a RAM 303, which will be described later with reference to FIG. That is, it is realized by the CPU 301 described later reading a program from the ROM 302 and using the RAM 303 as a work area. Further, the selection unit 101 is realized by each processing of step S601 in FIG. 6 described later, the changing unit 102 is executed by step S609, and the re-changing unit 104 is realized by step S611. The setting unit 103 is realized by associating with an alternative B and an alternative C for the function A described later with reference to FIG.

  The selection part 101 selects the function relevant to driving | running | working of a vehicle performed by using a 1 or several device. Specifically, the function A detects an obstacle located in the vicinity of the outside of the vehicle using a radio wave radar, and is captured using a function for supporting the safety of the vehicle or an image compression codec with a compression ratio P. Each function is selected to execute a function such as a function for recording a video around the host vehicle and a function for recording a video around the host vehicle imaged using the low compression codec P.

  The change unit 102 selects the function selected by the selection unit 101 when the amount of resources used when executing a plurality of functions including the function selected by the selection unit 101 exceeds the limit range in any device. Change to another alternative function. For example, the function A can be changed to an alternative B or an alternative C. The change unit 102 can also determine a function to be canceled according to a predetermined priority when the resource amount exceeds the limit range in any device regardless of which alternative function is used.

  In addition, the change unit 102 is selected by the selection unit 101 when any alternative function is used, specifically, when the resource amount exceeds the limit range in any of the alternative B and alternative C in any device. The selection of the selected function can be canceled by the selection unit 101. In this case, the changing unit 102 performs any function other than the function selected by the selecting unit 101, specifically, for the function E and the function F that are scheduled to be executed together with the function A. Even when the alternative function is used, the selection of the function selected by the selection unit 101 can be canceled by the selection unit 101 when the resource amount exceeds the limit range in any device.

  The changing unit 102 replaces any function to be executed other than the function selected by the selecting unit 101 with another substitute when the resource amount exceeds the limit range in any device even when any substitute function is used. It can also be changed to a function. That is, the above-described function E and function F can be changed to other alternative functions. In this case, the changing unit 102, when any alternative function is used for any of the functions to be executed other than the function selected by the selecting unit 101, when the resource amount exceeds the limit range in any device, It is also possible to determine a function to be canceled according to a predetermined priority order.

  The setting unit 103 associates a plurality of functions in advance. Specifically, an alternative B and an alternative C, which are functions that can be used alternatively, can be associated with the function A that is originally used. This association is not limited to a single direction. For example, the function A and the alternative C can be used as alternative functions for the use of the alternative B. Then, the changing unit 102 changes the associated function as an alternative function. That is, the alternative B or the alternative C associated as the alternative function is changed in place of the function A.

  When the execution of any one of the functions selected by the selection unit 101 is completed, the re-changing unit 104 returns the alternative function to the original function. Specifically, the substitute C is executed in place of the function A, and when the substitute process becomes unnecessary, the function A is returned to the original function A and the process is continued.

  FIG. 2 is a flowchart showing processing of the resource management method according to the embodiment of the present invention. First, the selection unit 101 selects a function related to traveling of the vehicle, which is executed by using one or a plurality of devices (step S201). Next, the changing unit 102 determines whether or not the amount of resources used when executing a plurality of functions including the function selected by the selecting unit 101 exceeds the limit range in any device (step). S202).

  If it is determined that it does not exceed (step S202: No), the series of processes is terminated. When it is determined that the number exceeds (step S202: Yes), the function selected by the selection unit 101 is changed to another alternative function (step S203). Here, even if any alternative function is used, if the resource amount exceeds the limit range in any device, the selection unit 101 can cancel the selection of the function selected by the selection unit 101. In this case, the change unit 102 selects the resource when the resource amount exceeds the limit range in any device even when any alternative function is used for any function to be executed other than the function selected by the selection unit 101. The selection of the function selected by the unit 101 can be canceled by the selection unit 101.

  Even if any of the alternative functions is used, if the resource amount exceeds the limit range of any of the devices, any function to be executed other than the function selected by the selection unit 101 is changed to another alternative function. You can also In this case, the changing unit 102, when any alternative function is used for any of the functions to be executed other than the function selected by the selecting unit 101, when the resource amount exceeds the limit range in any device, It is also possible to determine a function to be canceled according to a predetermined priority order. Then, a series of processing ends.

  According to the embodiment described above, for example, even when many functions are selected and the amount of resources used is increased, the functions can be replaced with alternative functions and executed. By adopting an alternative function, the amount of resources can be optimized, so that the selected function can be executed together with other functions without canceling. Thereby, for example, even when a function related to safety is selected, it is appropriately executed without being canceled, and safety during driving can be ensured.

  FIG. 3 is a block diagram illustrating a hardware configuration of the navigation apparatus. As shown in FIG. 3, the navigation apparatus 300 to which the resource management apparatus of the embodiment is applied includes a CPU 301, a ROM 302, a RAM (memory) 303, a magnetic disk drive 304, a magnetic disk 305, and an optical disk drive 306. , Optical disk 307, audio I / F (interface) 308, microphone 309, speaker 310, input device 311, video I / F 312, camera 313, display 314, communication I / F 315, GPS unit 316 and various sensors 317 are provided. In addition, the constituent units 301 to 317 are connected to each other by a bus 320.

  First, the CPU 301 governs overall control of the navigation device. The ROM 302 records programs such as a boot program and a navigation program. The RAM 303 is used as a work area for the CPU 301.

  The magnetic disk drive 304 controls the reading / writing of the data with respect to the magnetic disk 305 according to control of CPU301. The magnetic disk 305 records data written under the control of the magnetic disk drive 304. As the magnetic disk 305, for example, an HD (hard disk) or an FD (flexible disk) can be used.

  The optical disk drive 306 controls the reading / writing of the data with respect to the optical disk 307 according to control of CPU301. The optical disk 307 is a detachable recording medium from which data is read according to the control of the optical disk drive 306. As the optical disc 307, a writable recording medium can be used. In addition to the optical disk 307, the removable recording medium may be an MO, a memory card, or the like.

  Another example of information recorded on the magnetic disk 305 or the optical disk 307 is map data used for route search / route guidance. The map data includes background data representing features (features) such as buildings, rivers, and the ground surface, and road shape data representing the shape of the road. The map data can be displayed two-dimensionally or three-dimensionally on the display screen of the display 314. Drawn. When the navigation device is in the route guidance, the map data and the current location of the vehicle acquired by the CPU 301 are displayed in an overlapping manner.

  The audio I / F 308 is connected to a microphone 309 for audio input and a speaker 310 for audio output. The sound received by the microphone 309 is A / D converted in the sound I / F 308. In addition, sound is output from the speaker 310. Note that the sound input from the microphone 309 can be recorded on the magnetic disk 305 or the optical disk 307 as sound data.

  Examples of the input device 311 include a remote controller having a plurality of keys for inputting characters, numerical values, various instructions, a keyboard, a mouse, a touch panel, and the like. Further, the input device 311 can be connected to another information processing terminal such as a digital camera or a mobile phone terminal to input / output data.

  The video I / F 312 is connected to a camera 313 for video input and a display 314 for video output. Specifically, the video I / F 312 includes, for example, a graphic controller that controls the entire display 314, a buffer memory such as a VRAM (Video RAM) that temporarily records image information that can be displayed immediately, and a graphic controller. Based on the output image data, the display 314 is configured by a control IC or the like.

  The camera 313 captures images inside and outside the vehicle and outputs them as image data. Note that the video imaged by the camera 313 is overwritten and recorded in a memory or the like (not shown), and the overwritten video is stored when an obstacle is detected in the vicinity of the vehicle. In addition, detection of obstacles in the vicinity of the vehicle is not limited to detection by the camera 313, but detection by an infrared sensor, detection using a radio wave radar, and the like can be considered. In this hardware configuration, a configuration for detecting these obstacles is also possible. It is equipped.

  An image captured by the camera 313 can be recorded as image data on the magnetic disk 305 or the optical disk 307. The display 314 displays icons, cursors, menus, windows, or various data such as characters and images. As the display 314, for example, a CRT, a TFT liquid crystal display, a plasma display, or the like can be adopted.

  The communication I / F 315 is connected to a network via wireless and functions as an interface between the navigation device and the CPU 301. The communication I / F 315 is further connected to a communication network such as the Internet via wireless, and also functions as an interface between the communication network and the CPU 301.

  Communication networks include LANs, WANs, public line networks and mobile phone networks. Specifically, the communication I / F 315 includes, for example, an FM tuner, a VICS / beacon receiver, a wireless navigation device, and other navigation devices. The communication I / F 315 receives road traffic information such as traffic congestion and traffic regulations distributed from the VICS center. get. VICS is a registered trademark.

  The GPS unit 316 receives radio waves from GPS satellites and outputs information related to the position of the vehicle on which the navigation device is mounted. The output information of the GPS unit 316 is used when the CPU 301 calculates the current location of the vehicle together with output values of various sensors 317 described later. The information indicating the current location is information for specifying one point on the map data, such as latitude / longitude and altitude.

  The various sensors 317 output information for determining the position and behavior of the vehicle, such as a vehicle speed sensor and an angular velocity sensor. The output values of the various sensors 317 are used for the calculation of the current position of the vehicle by the CPU 301 and the measurement of the change in speed and direction. In the above block diagram, one CPU 301 that controls the entire navigation apparatus is described. However, for example, two CPUs may be provided, and the CPU to be used may be switched depending on the function.

  Although not shown in the above block diagram, a DSP that performs predetermined compression processing on audio signals and image signals, a memory that records data subjected to compression processing, and the like are provided. It may be provided and used depending on the function. In addition, these devices include devices that process a plurality of functions at the same time, and assign a resource amount to be used for each function to the device, and control necessary to execute each function according to the resource amount, Or process. In the category of the navigation device, the plurality of functions include, for example, a route search function that searches for a route to the destination, a drive recorder function that stores video captured by the camera 313 at a predetermined timing, and the like. .

  In the above block diagram, the hardware configuration of the navigation device is described, but the hardware configuration of the recording medium playback device that plays back music information and video information recorded on the recording medium as well as the navigation device is added. It is good also as an apparatus as a system. In that case, the devices such as the CPU, DSP, and memory described above may perform control and processing in the navigation apparatus and perform control and processing in the recording medium playback apparatus in common.

  In the above navigation apparatus, resource management is executed. Here, each function including the safety support function is listed, and each resource has a necessary resource amount. The resource amount for each function is shown in FIG. This list-up can be set in advance when the device is shipped, but can be set by the user. The necessary resource amount may be input with data at the time of shipment, or the device can investigate the necessary amount each time.

  And the place which wants to mainly operate the above safety support function is set. The location can be set in advance when the device is shipped, but can be set by the user. The device is provided with a resource monitor, and the amount of resources currently used by each device for processing is monitored for each used amount and each function being operated.

  FIG. 4 is an explanatory diagram for explaining the resource amount of each device when the alternative function is used. Here, the function A and the alternative functions B and C will be described. Each function uses one or more of CPU (1), CPU (2), DSP (1), and DSP (2) and a memory. MIPS is used for the amount of resources used. The device upper limit is 200 MIPS, 200 MIPS, 500 MIPS, and 500 MIPS, and each device can be used by selecting each function up to this resource amount.

  The functions A, B, and C are functions that support the safety of the host vehicle by detecting an obstacle located near the outside of the host vehicle using the radio wave radar. Is a function that detects obstacles by capturing images of the surroundings of the vehicle with a camera and supports the safety of the vehicle, and the alternative C is an obstacle located near the outside of the vehicle using infrared rays. It can be exemplified as a function of detecting an object and supporting the safety of the host vehicle.

  In addition, the function A is a function for recording the video around the host vehicle imaged using the image compression codec with the compression ratio P, and the alternative B uses the image compression codec with the compression ratio Q different from the compression ratio P. This is a function for recording the video around the subject vehicle, and the alternative C records the image around the subject vehicle taken using an image compression codec having a compression rate R different from the compression rates P and Q. Function.

  Furthermore, the function A is a function for recording an image around the own vehicle imaged using the low compression codec, and the alternative B is a function for recording an image around the own vehicle imaged using the medium compression codec, In addition, the alternative C has a function of recording the video around the host vehicle imaged using the high compression codec (low, medium, and high indicate that the amount of memory used for recording varies depending on the compression rate, for example, If it is low, the compression rate is lowered and the amount of memory used for recording is increased. The function A corresponds to the function related to traveling in the present embodiment.

  As described above, the alternative B and the alternative C are prepared in addition to the function A. However, as described above, the alternative B and the alternative C are highly related to the function A. If the function A is replaced with an unrelated function, the original purpose cannot be realized. Therefore, the function to be replaced needs to be set in advance. Therefore, the alternative B and the alternative C are associated with the function A in advance by the setting function of the setting unit 103 in advance. These alternative B and alternative C can be used as other alternative functions instead of using the function A.

  The function A uses the CPU (1), and the used resource amount is 100 MIPS. On the other hand, CPU (2) is not used. Also, DSP (1) is used, and the amount of resources used is 400 MIPS. On the other hand, DSP (2) is not used. Note that 50 MB of memory is used. Alternative B does not use any of CPU (1), CPU (2), and DSP (1). Also, DSP (2) is used, and the amount of resources used is 400 MIPS. Note that 100 MB of memory is used. The alternative C does not use the CPU (1). On the other hand, the CPU (2) is used and the amount of resources used is 200 MIPS. Also, DSP (1) is used, and the amount of resources used is 200 MIPS. On the other hand, DSP (2) is not used. The memory uses 0 MB.

  FIG. 5 is an explanatory diagram for explaining the resource amount of each device when each function is used. Here, function A, function E, and function F will be described. Each function uses one or more of CPU (1), CPU (2), DSP (1), and DSP (2) and a memory. MIPS is used for the amount of resources used. The upper limit of the device is 200 MIPS, 400 MIPS, 500 MIPS, and 500 MIPS, and each device can be used by selecting each function up to this resource amount.

  The function E is a function related to travel such as route search and point search, and the function F is a function that reads out and outputs music information recorded on a recording medium, that is, a function that is not related to travel, for example. Can be illustrated. Note that, as the alternative B and the alternative C are associated with the function A, the alternative function can be similarly associated with the function E and the function F. By the way, for functions E and F, for example, priorities are set depending on whether or not they are related to driving, the resource amount of any of the above-mentioned devices exceeds the upper limit, and further, functions B and C are substituted for function A. If the upper limit value is still exceeded, the execution of the corresponding function may be canceled according to the priority order.

  In the above example, when the functions A, E, and F are to be executed at the same time, the resource amount of either DSP (1) or DSP (2) that is commonly used for the execution has the upper limit value. Even if alternatives B and C are assigned to function A, if the resource amount still exceeds the upper limit value, execution of function F not related to traveling is given priority and its execution is canceled. Also good. Regardless of whether the priority to cancel is a function related to driving or not, the priority is increased for the function having a large amount of resources of the device used in common, and the function to be canceled is determined according to the priority. May be.

  The function A uses the CPU (1), and the used resource amount is 100 MIPS. On the other hand, CPU (2) is not used. Also, DSP (1) is used, and the amount of resources used is 400 MIPS. On the other hand, DSP (2) is not used. Note that 50 MB of memory is used. Function E does not use any of CPU (1), CPU (2), and DSP (1). Also, DSP (2) is used, and the amount of resources used is 400 MIPS. Note that the memory uses 30 MB. Function F does not use CPU (1). On the other hand, the CPU (2) is used and the amount of resources used is 200 MIPS. Also, DSP (1) is used, and the amount of resources used is 200 MIPS. On the other hand, DSP (2) is not used. Note that 150 MB of memory is used.

  FIG. 6 is a flowchart for explaining resource management processing. In this flowchart, the function A is a function for recording video using an image compression codec with a compression ratio P, the alternative B is a function for recording video using an image compression codec with a compression ratio Q, and the alternative C is a compression ratio R. This will be described as a function of recording video using the image compression codec. First, the image compression codec P is used (step S601). The image compression codec P is the function A described with reference to FIG. 4 and has functions B and C as alternative functions. That is, the function A is selected and used by the selection unit 101. Next, it is determined whether or not use of another function is instructed (step S602). This instruction to use another function is an instruction to use one of the functions E and F described in FIG. 5, or an instruction to use both.

  If it is determined that no instruction has been given (step S602: No), the process proceeds to step S612. If it is determined that an instruction has been issued (step S602: Yes), it is determined whether or not the resource upper limit has been exceeded for any device (step S603). When the upper limit is not exceeded (step S603: No), the other function instructed to be used is used as it is (step S604), and the process proceeds to step S612.

  When the upper limit is exceeded (step S603: Yes), for example, when function A, function E, and function F are to be executed simultaneously, CPU (1) is 100 MIPS, CPU (2) is 200 MIPS, DSP (1) is 600 MIPS, DSP (2) is 400 MIPS, and commonly used DSP (2) is 400 MIPS and does not exceed the upper limit value 500 MIPS, but DSP (1) is 600 MIPS and exceeds the upper limit value 500 MIPS and exceeds the upper limit.

  Therefore, processing of an alternative function of the image compression codec P is executed. First, an alternative function candidate is selected (step S605). That is, the alternative B in FIG. 4 is selected. Then, the resource amount of each device when another function instructed to be used, that is, the functions E and F are used as they are, is checked to determine whether any device has exceeded the resource upper limit (step S606).

  When the upper limit is exceeded (step S606: Yes), for example, when function A is replaced with B, CPU (1) is 0, CPU (2) is 200 MIPS, DSP (1) is 200 MIPS, and DSP (2) is 800 MIPS. The DSP (1) used in common does not exceed the upper limit value 500 MIPS at 200 MIPS, but the DSP (2) exceeds 800 MIPS and exceeds the upper limit value 500 MIPS.

  In this case, it is determined whether there are other alternative function candidates (step S607). If there is another alternative candidate (step S607: Yes), specifically, if there is a substitute C in addition to the alternative B, the process returns to step S605 to check the other alternative candidates. If there is no other alternative candidate (step S607: No), a cancel process is executed (step S608). Specifically, when the alternative C is not provided, or when the function A is changed to the alternative C, the resource amount of the DPU (2) does not fall within the upper limit of 500 MIPS, and other than the alternative B and the alternative C If there is no alternative function, the function A is canceled or the function to be canceled is determined and canceled according to the priority order. Here, the case where the function A, the function E, and the function F are canceled after the alternative B and the alternative C are tried has been described, but it is determined in step S603 that the resource upper limit has been exceeded in any device. At that time, the function A can be canceled.

  If the upper limit is not exceeded (step S606: No), for example, the alternative C may be selected as an alternative function candidate in step S605, and the resource amount of each device may be examined when the function A is set as the alternative C in step S606. Can be mentioned. Specifically, when the alternative C is used, the resource amount of each device is 0 for the CPU (1), 400 MIPS for the CPU (2), 400 MIPS for the DSP (1), and 400 MIPS for the DSP (2). CPU (2) does not exceed the upper limit of 400 MIPS at 400 MIPS, DSP (1) does not exceed the upper limit of 500 MIPS at 400 MIPS, and DSP (2) does not exceed the upper limit of 500 MIPS at 400 MIPS. .

  Therefore, the function A is changed to the alternative C and the process is executed (step S609). That is, the processing of the image compression codec P is changed to the processing of the image compression codec R. That is, the change unit 102 changes the function to an alternative function and executes it. Then, another function is used (step S610). That is, the alternative C, function E, and function F are executed simultaneously.

  Then, the alternative function of the image compression codec P is returned (step S611). That is, the function is returned from the alternative function C to the function A. That is, when execution of the functions E and F is completed, it is no longer necessary to replace the process with the alternative C, so that the re-changing unit 104 executes the process of re-changing to the original function A. Then, the process proceeds to step S612.

  Then, it is determined whether or not the travel is finished (step S612). When the travel is finished (step S612: Yes), the series of processes is finished. If it is not the end of travel (step S612: No), the process returns to step S602. In the above description, the case where the alternative B or the alternative C is used for the function A has been described. However, when the alternative function is set for the function E or the function F instead of the function A, the function E or Alternative processing can also be performed for the function F. Here, for example, when the substitute process is performed for the function E instead of the function A, the processes from step S605 to step S611 described for the function A can be replaced with, for example, the description of the function E and the substitute function. After confirming that the upper limit of the resource is not exceeded even if the substitute function of the function E is used, the function A can be used as it is without being replaced by changing the function E to the substitute function.

  According to the above-described embodiment, when various functions are operated by sharing resources and the resource amount exceeds the upper limit, each function is realized within the limit amount by replacing it with an alternative function. be able to. For example, even when resources are over in the safety priority area, an alternative function equivalent to the safety support function is selected, and a necessary function can be executed within the range of normal resource allocation. Thereby, safety during driving can be ensured.

  The resource management method described in this embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. The program may be a transmission medium that can be distributed via a network such as the Internet.

101 selection unit 102 change unit 103 setting unit 104 re-change unit

Claims (10)

Selection means for selecting a function related to the running of the vehicle, which is performed by using one or more devices;
When the amount of resources used when executing a plurality of functions including the function selected by the selection unit exceeds the limit range in any device, the function selected by the selection unit is replaced with another alternative function. Change means to change to,
With
The changing unit determines a function to be canceled according to a predetermined priority when the resource amount exceeds a limit range in any device regardless of which alternative function is used. It has setting means to associate multiple functions in advance,
The resource management apparatus according to claim 1, wherein the changing unit uses a function associated with the function selected by the selecting unit as an alternative function.   The changing unit causes the selection unit to cancel the selection of the function selected by the selection unit when the resource amount exceeds the limit range in any device regardless of which alternative function is used. The resource management apparatus according to claim 1 or 2.   The changing means performs any of the functions to be executed other than the function selected by the selecting means when the resource amount exceeds the limit range in any of the devices even when any of the alternative functions is used. The resource management apparatus according to claim 1, wherein the resource management apparatus is changed to an alternative function.   The changing means has a predetermined priority when the resource amount exceeds the limit range in any device even when any alternative function is used for any of the functions to be executed other than the function selected by the selection means. The resource management apparatus according to claim 4, wherein a function to be canceled is determined according to an order.   When the resource amount exceeds the limit range in any device even when any alternative function is used for any of the functions to be executed other than the function selected by the selection means, the changing means is the selection means. The resource management apparatus according to claim 3, wherein the selection unit cancels the selection of the function selected by the selection unit.   5. The re-changing means for returning the substitute function to the original function when execution of any one of the functions selected by the selecting means is completed. The resource management device according to any one of the above. A selection step of selecting a function related to the running of the vehicle, which is performed by using one or more devices;
When the amount of resources used when executing a plurality of functions including the function selected by the selection process exceeds the limit range in any device, the function selected by the selection process is replaced with another alternative function. Change process to change to,
Including
In the resource management method, the changing step determines a function to be canceled according to a predetermined priority when the resource amount exceeds a limit range in any device regardless of which alternative function is used.   A resource management program for causing a computer to execute the resource management method according to claim 8.   10. A computer-readable recording medium on which the resource management program according to claim 9 is recorded.

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