CN114937370A - Vehicle searching method and device for underground garage - Google Patents
Vehicle searching method and device for underground garage Download PDFInfo
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- G08G1/00—Traffic control systems for road vehicles
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- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
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- G—PHYSICS
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- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/14—Traffic control systems for road vehicles indicating individual free spaces in parking areas
- G08G1/141—Traffic control systems for road vehicles indicating individual free spaces in parking areas with means giving the indication of available parking spaces
- G08G1/144—Traffic control systems for road vehicles indicating individual free spaces in parking areas with means giving the indication of available parking spaces on portable or mobile units, e.g. personal digital assistant [PDA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
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Abstract
The application discloses a vehicle searching method and device for an underground garage, which are used for solving the technical problems of weak signals and high vehicle searching cost of the underground garage. The method comprises the following steps: the vehicle owner terminal accesses a wireless network created by the network equipment and accesses a vehicle searching service of the SDN controller; the SDN controller determines an MAC address of the vehicle owner terminal and inquires a preset database based on the MAC address to determine a parking space number associated with the MAC address; the SDN controller allocates a terminal IP address to the vehicle owner terminal and determines a parking space IP address based on the parking space number; the SDN controller determines first network equipment with direct routing information of the MAC address, and searches the parking space IP address hop by hop through the terminal IP address from the first network equipment; and after finding the parking space IP address, the SDN controller connects network equipment passed by the hop-by-hop process to generate a vehicle searching path.
Description
Technical Field
The application relates to the technical field of software defined networks, in particular to a vehicle searching method and device for an underground garage.
Background
With the development of the times and the improvement of the living standard of people, a personal automobile enters thousands of households, and even a single household purchases new energy automobiles, traditional oil trucks, small and medium-sized trucks and the like according to different scenes and different requirements of travel, so that the situations of multiple automobiles in one household are more and more. The need for parking is also growing. Meanwhile, the scale of the underground parking lot is gradually increased, the structure is gradually complicated, the number of layers is increased, and the internal environment of the parking lot is gradually complicated. Network signals of base stations and GPS signals built by general operators are difficult to penetrate through the walls of floors, so that the condition that the network signals of underground garages are poor or even no network signals exist is caused. It is therefore difficult to record finding their own vehicle using common positioning software.
In order to achieve the purpose of searching vehicles, the current parking space vehicle searching scheme is almost required to obtain the current position of a vehicle owner, the position of a searched vehicle, each walkable road of a parking lot and a corresponding road searching algorithm, and display the calculated and obtained path and other elements. However, in these schemes, data transmission needs strong network signal support, and the vehicle-searching cost is greatly increased.
Disclosure of Invention
The embodiment of the application provides a vehicle searching method and device for an underground garage, and aims to solve the technical problems that strong network signal support is needed and the cost is high in the existing vehicle searching scheme of the underground garage.
In one aspect, the embodiment of the application provides a vehicle searching method for an underground garage, and the method comprises the following steps: the vehicle owner terminal accesses a wireless network created by the network equipment and accesses a vehicle searching service of the SDN controller; the network equipment is arranged above each intersection of the underground garage and has the function of establishing a wireless network; the SDN controller determines an MAC address of the vehicle owner terminal, and queries a preset database based on the MAC address to determine a parking space number associated with the MAC address; the SDN controller allocates a terminal IP address to the vehicle owner terminal and determines a parking space IP address based on the parking space number; the SDN controller determines first network equipment with direct routing information of the MAC address, and searches the parking space IP address hop by hop through the terminal IP address from the first network equipment; and after finding the parking space IP address, the SDN controller connects network equipment passed by the hop-by-hop process to generate a vehicle searching path.
In one possible implementation manner of the embodiment of the present application, before the vehicle owner terminal accesses a vehicle finding service of an SDN controller, the method further includes: the method comprises the steps that an owner terminal accesses a wireless network created by network equipment and accesses a parking service of an SDN controller; the SDN controller records the MAC address corresponding to the vehicle owner terminal and receives the license plate number and the parking space number corresponding to the vehicle owner terminal; and the SDN controller associates and binds the license plate number and the parking space number with the MAC address and then stores the license plate number and the parking space number into the preset database.
In a possible implementation manner of the embodiment of the present application, the SDN controller receives a license plate number and a parking space number corresponding to the vehicle owner terminal, and specifically includes: the SDN controller receives a license plate number and a parking space number which are determined by the owner terminal based on information manually input by an owner; or the SDN controller receives the parking lot number and the license plate number collected by a camera corresponding to the network device; the camera is installed above the parking place corresponding to the parking place number.
In a possible implementation manner of the embodiment of the present application, before the SDN controller receives the license plate number and the parking space number corresponding to the owner terminal, the method further includes: the SDN controller determines a parking space number corresponding to the vehicle owner terminal, and specifically includes: the SDN controller determines second network equipment with the MAC address direct routing information according to the MAC address; the SDN controller traverses the parking space IP address without routing information by taking the second network equipment as a starting point to determine a parking space number closest to the second network equipment; and sending the parking space number closest to the parking space number to the vehicle owner terminal.
In one possible implementation manner of the embodiment of the present application, before the vehicle owner terminal accesses the vehicle searching service of the SDN controller, the method further includes: the SDN controller allocates different address fields for different parking space areas of the underground garage, allocates parking space IP addresses for parking spaces in the parking space area based on the address fields, and specifically comprises the following steps: and allocating parking space IP addresses for the parking spaces according to the parking space numbers, wherein the smaller the parking space number is, the smaller the number of the allocated parking space IP address is.
In a possible implementation manner of the embodiment of the present application, the generating, by the SDN controller, a vehicle finding path specifically includes: the SDN controller determines a plurality of network devices passing through a hop-by-hop process and starts display screens corresponding to the network devices respectively; the license plate number indicating area is arranged on the left side of the display screen, the arrow indicating area is arranged on the right side of the display screen, and the arrow indicating area comprises an upper arrow, a lower arrow, a left arrow and a right arrow; the SDN controller connects the network devices to form a network path, and the network path is mapped into a vehicle searching path through the display screen; the license plate number indication area of the display screen displays a license plate number, and the arrow indication area of the display screen displays the vehicle seeking path direction.
In a possible implementation manner of the embodiment of the present application, the mapping, by the SDN controller, the network path to a vehicle finding path through the display screen specifically includes: determining that an equal cost path exists in the network paths; wherein the equivalence path is used to indicate a bifurcation existing in the network path; selecting the equivalence path by the following formula:
L＝R+H+1/(M-RN)
wherein, L is the weight of the equal cost path, R is the number of network devices passed by the equal cost path, H is the number of overlapping equal cost paths in a preset time period, and is used for indicating the number of times of passing the equal cost path in the preset time period, RN is a network device identification number, and M is a preset adjustment parameter; and mapping the selected equivalent path into a vehicle searching path through the display screen.
In one possible implementation manner of the embodiment of the present application, after the generating the car-finding path, the method further includes: the owner terminal accesses a routing service of the SDN controller; the SDN controller determines a garage exit closest to the parking space number according to the parking space number, and acquires an exit IP address corresponding to the garage exit; the SDN controller determines third network equipment with direct connection routing information of the vehicle owner MAC address, and searches the exit IP address hop by hop through the parking space IP address from the third network equipment; and connecting the network equipment passed by the hop-by-hop process to generate an ex-warehouse path.
In a possible implementation manner of the embodiment of the present application, the network device has a routing function, and can run a dynamic routing protocol; the SDN controller can interact with the network device through an OpenFlow protocol.
On the other hand, this application embodiment still provides a car equipment of seeking in underground garage, includes: the system comprises a processor and a memory, wherein the memory stores an executable program, and when the executable program is executed, the processor executes the vehicle searching method of the underground garage.
According to the method and the device for searching the vehicle in the underground garage, the network device with the wireless function is laid, a wireless network is created, communication between main devices/terminals can be borne, the problem that signals of the underground garage are weak can be solved, meanwhile, the addressing technology of the dynamic routing protocol is applied to the field of vehicle searching, extra cost is not consumed, a routing algorithm is researched and developed, the routing algorithm of the relatively mature dynamic routing protocol is directly multiplexed, the algorithm cost is reduced, in addition, the IP and the parking space IP of the main terminal of the vehicle are communicated through the PIN, the passing network device is recorded, a vehicle searching path is formed, the vehicle to be searched can be accurately positioned, the vehicle owner does not need to additionally increase a handheld module/vehicle-mounted module, and the installation and maintenance cost of the device is further reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flowchart of a vehicle searching method for an underground garage according to an embodiment of the present application;
fig. 2 is a schematic view of parking space distribution of an underground garage provided in an embodiment of the present application;
fig. 3 is a schematic diagram illustrating an installation location of a network device in an underground garage according to an embodiment of the present application;
fig. 4 is a schematic diagram of a display screen indicating a car-finding path according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a vehicle searching device of an underground garage according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions proposed in the embodiments of the present application are explained in detail below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a vehicle searching method for an underground garage according to an embodiment of the present application. As shown in fig. 1, the method for searching a vehicle in an underground garage provided by the embodiment of the application at least includes the following steps:
In the embodiment of the application, the vehicle owner terminal is a mobile phone, a tablet, a computer and other terminal equipment which can be carried by a vehicle owner and can be connected with the internet. The network equipment is ceiling network equipment with a wireless network establishing function and a routing function and can be installed on the roof of the underground garage. The SDN controller is a core processor, communicates with the network equipment and the vehicle owner terminal, gives a vehicle searching path and realizes a final vehicle searching function.
After the vehicle owner terminal enters the underground garage along with a vehicle owner, the vehicle owner terminal can access the wireless network created by the network equipment under the operation of the vehicle owner, and if the vehicle owner terminal enters the underground garage before, the vehicle owner terminal can directly access the wireless network created by the network equipment without the control of the vehicle owner terminal after entering the underground garage again.
Furthermore, after the vehicle owner terminal is connected to the wireless network, the vehicle owner terminal can automatically jump to the vehicle searching interface and can also search the vehicle interface under the control of the vehicle owner. And accessing the vehicle searching service of the SDN controller after entering the vehicle searching interface. The access service here may be triggered based on a clicking operation of the owner.
After the vehicle owner terminal accesses the vehicle searching service of the SDN controller, the SDN controller starts a vehicle searching program. Firstly, the MAC address of the owner terminal is obtained, so that a preset database is inquired based on the MAC address, and the parking space number associated/bound with the MAC address is found in the preset database. It should be noted that the MAC address of the vehicle owner terminal and the information such as the parking space number and the license plate number bound to the MAC address are stored in the preset database, and the specific storage process is described in the following relevant parts, which is not described herein again in the embodiments of the present application.
103, the SDN controller allocates a terminal IP address to the vehicle owner terminal and determines a parking space IP address based on the parking space number.
And after finding the parking space number bound with the MAC address of the vehicle owner terminal, acquiring a parking space IP address corresponding to the parking space number. It should be noted that the SDN controller may perform IP address allocation on each parking space, and specific allocation principles and allocation processes are described in the following relevant parts, which are not described herein again.
Further, since the MAC address cannot be used for addressing service of the SDN controller, the SDN controller may also create an IP address for the owner terminal to PIN with the parking space IP address. The specific creation/assignment process may be implemented by an existing method or algorithm.
And step 104, the SDN controller searches the parking space IP address hop by hop from the first network device through the terminal IP address.
Because the vehicle owner terminal accesses the wireless network created by the network equipment, and the network equipment has a routing function, a first network equipment with the direct connection routing information of the vehicle owner terminal exists in the network equipment, and after the SDN controller determines the first network equipment, the SDN controller searches the parking space IP address hop by hop from the first network equipment through the terminal IP address, namely the PIN communication is carried out on the terminal IP address and the parking space IP address.
And 105, after finding the parking space IP address, the SDN controller connects network devices passing through the hop-by-hop process to generate a vehicle searching path.
After the terminal IP address and the parking space IP address PIN are communicated, the SDN controller finds the parking space IP address, at the moment, the SDN controller records the network equipment passing through the hop-by-hop process and connects the network equipment to form a network path, and then a vehicle searching path is generated according to the network path.
In order to better describe the vehicle searching method of the underground garage provided by the embodiment of the application, the embodiment of the application also provides the following technical contents.
In one or more embodiments of the present application, before the vehicle owner performs vehicle searching, the vehicle is definitely stored in the underground garage, and therefore, the vehicle owner terminal must access the parking service of the SDN controller before accessing the vehicle searching service of the SDN controller. Specifically, after the vehicle owner opens the vehicle into the underground garage, the vehicle owner terminal accesses the wireless network created by the network device and then accesses the parking service of the SDN server, and the access and access processes are the same as or similar to the foregoing processes, and are not described in detail herein. And then, the vehicle owner manually inputs the parking space number and the license plate number based on the page displayed by the vehicle owner terminal, and after the input, the SDN controller binds the MAC address of the vehicle owner terminal with the license plate number and the parking space number together, stores the MAC address and the license plate number and stores the MAC address and the license plate number in a preset database.
What need explain, can install equipment such as camera, sensor in some underground garage, for the convenience car owner uses, increase car owner's convenience, the process that the license plate number, parking stall number were received to the SDN controller can also realize through equipment such as camera, sensor, specifically, the camera is installed in the oblique top of parking stall, makes it can gather the license plate number of parking the vehicle on parking stall number and this parking stall of treating the parking stall, the camera passes to the SDN controller on with the parking stall number and the license plate number of gathering.
And at this point, the vehicle storage is completed, namely the vehicle owner terminal completes the access of the parking service.
In one or more embodiments of the present application, it is generally unclear to the owner of the vehicle where there are free slots after the owner has entered the garage, at which point, the service of searching for the idle parking space can be accessed by the vehicle owner terminal to the SDN controller, and the idle parking space can be found more quickly, specifically, after the vehicle owner terminal accesses the wireless network created by the network device, the SDN controller may determine a second network device having direct routing information for the owner terminal MAC address, then, the second network device is taken as a starting point, the parking space IP address is traversed, the parking space IP address without the routing information is determined, and then determining the parking space closest to the second network equipment, namely the parking space closest to the vehicle owner terminal, based on the address number of the parking space IP address without the routing information, and finally sending the parking space number to the vehicle owner terminal so that the vehicle owner can find the nearest free parking space. It should be noted that the second network device and the first network device may be the same network device or different network devices, because the owner of the vehicle is in different locations of the underground garage, and the wireless network created by different network devices is accessed, so that different network devices have direct connection routing information of the owner's terminal. It can be understood that, when the vehicle owner terminal accesses the wireless network created by which network device, which network device will have the direct connection routing information of the vehicle owner terminal in the first time.
In one or more embodiments of the present application, the SDN controller may first create a parking space IP address for each parking space in the underground garage. According to the actual building structure of the garage, ceiling network equipment with a routing function is laid above each passageway intersection and all outlets. Fig. 2 is a schematic diagram of parking space distribution in an underground garage provided by the embodiment of the application, and as shown in fig. 2, the garage has 4 exits, namely north 1 exit, north 2 exit, south 1 exit and south 2 exit, and the garage has 6 total parking space partitions, namely a-F partitions. When the SDN server allocates IP addresses to the parking spaces in the parking garage, the address sections are matched with the parking space partitions, for example, an area A corresponds to a network segment 1 of the IP addresses, and parking spaces 0 to 10 in the area A respectively correspond to addresses 1 to 10 in the network segment 1. Meanwhile, road sections exist between the areas A and F, and intersections exist at the positions where the road sections are connected, wherein the intersections are the positions where network equipment needs to be installed. Fig. 3 is a schematic view of installation positions of network devices in an underground garage according to an embodiment of the present application, where as shown in fig. 3, (corresponding to the positions in fig. 2) the network devices are installed at positions of an exit of the garage and at intersections in the garage.
Further, the network device in the embodiment of the present application may be a single device having a function of running a dynamic routing protocol and a wireless function; or a combination of the two functions. All network devices are managed by the SDN controller in a unified way, a network segment A is divided to be special for basic intercommunication of the network devices, and all the network devices run a dynamic routing protocol. Meanwhile, the network equipment can be connected with a router to perform nat conversion and communicate with an external network. Furthermore, each parking space is represented by a determined parking space IP address, and the address fields of the same parking space area are the same and represent the area. When the vehicle is parked in the parking space, the SDN controller interacts with the network device through an OpenFlow protocol to create a loopback interface, and configures a parking space IP address predefined by the parking space. And all network equipment runs the dynamic routing protocol, so that the whole network intercommunication is achieved, and therefore all network equipment can learn the routing information. The network device has not only a function of creating a wireless network but also a routing function, and can run a dynamic routing protocol.
Further, the principle of creating the parking space IP address is as follows: different address sections are distributed for different parking space areas of an underground garage, and parking space IP addresses are distributed for all parking spaces in the parking space area based on the address sections, specifically, the parking space IP addresses are distributed for all the parking spaces according to the number of the parking spaces, and the smaller the number of the parking spaces is, the smaller the number of the allocated parking space IP addresses is.
In one or more embodiments of the present application, in order to facilitate a car owner to find a car according to a car-finding path, an on-line map display and an actual physical environment indication board are used as a display mode of the car-finding path, the on-line map display is to display a garage map on a car owner terminal and provide a path prompt on the map, and the actual physical environment indication is to simultaneously install a display screen at an installation position of each network device, and then to display a license plate number and a path indication through the display screen to guide the car owner to arrive at a corresponding parking space. Specifically, the SDN controller determines a plurality of network devices that pass through in a hop-by-hop process, and starts up display screens corresponding to the plurality of network devices, respectively; the left side of the display screen is a license plate number indicating area, the right side of the display screen is an arrow indicating area, and the arrow indicating area comprises an upper arrow, a lower arrow, a left arrow and a right arrow, and the specific form is shown in fig. 4 (C); the method comprises the steps of connecting a plurality of network devices to form a network path, and mapping the network path into a car-seeking path through a display screen, namely enabling a license plate number indication area of the display screen to display a license plate number, and enabling an arrow indication area of the display screen to display the direction of the car-seeking path.
Fig. 4 is a schematic diagram of a display screen indicating a car-seeking path provided by an embodiment of the present application, assuming that a car owner's route needs to turn at a crossing between areas a and B, as shown in fig. 4(a), at this time, the display content of a sign 1 is shown in fig. 4(B), and the display content of a sign 2 is shown in fig. 4 (c). The vehicle owner can walk according to the lighted arrow on the indication board to reach the position of the vehicle.
In one or more embodiments of the present application, if there are multiple equal cost paths in the vehicle finding path, the equal cost paths are used to indicate a bifurcation existing in the network path, that is, there is a bifurcation in the vehicle finding path, and two paths corresponding to the bifurcation can both reach the vehicle position, at this time, the SDN controller selects a path according to the following algorithm:
L＝R+H+1/(M-RN)
wherein L represents a path weight value, and the smaller the path weight value, the higher the priority. R represents the number of network devices needing to pass through, and the smaller the R represents the closer the route. H represents the number of overlapping user routes in the current time period, and a smaller one represents that fewer people will pass through the route at the moment. The RN represents the network device identification number, and generally, the number increases from the entrance to the depth of the parking lot, i.e., the farther away from the entrance, the larger the value of the network device identification number. M is a preset adjusting parameter, and the value of the parameter is large enough.
In the above process, if the weight of the path selected by the dynamic routing protocol is not the minimum, the SDN controller automatically modifies the delay or bandwidth of the path of the network device or other factors affecting the dynamic routing protocol through the OpenFlow protocol or the SSH protocol to change the routing information of the dynamic routing protocol, so that a suboptimal path on the network is obtained, but a more optimal path is actually selected as the optimal path on the physical line.
In one or more embodiments of the present application, after the vehicle owner finds the parking space, the vehicle owner may connect to the wireless network through the vehicle owner terminal, and access the route finding service of the SDN controller to find the nearest relatively idle garage exit. Similarly, the SDN controller determines a garage exit closest to the parking space number according to the parking space number, and acquires an exit IP address corresponding to the garage exit; then determining third network equipment with the direct connection routing information of the vehicle owner MAC address, and searching for an exit IP address hop by hop through the parking space IP address from the third network equipment; and finally, connecting the network equipment passed by the hop-by-hop process to generate an ex-warehouse path.
The above embodiments of the method in the embodiment of the present application are based on the same inventive concept, and the embodiment of the present application further provides a vehicle searching device for an underground garage, and the structure of the vehicle searching device is shown in fig. 5.
Fig. 5 is a schematic structural diagram of a vehicle searching apparatus of an underground garage according to an embodiment of the present application, and as shown in fig. 5, the apparatus includes a processor and a memory, where executable instructions are stored, and when the executable instructions are executed, the processor is enabled to substantially perform a vehicle searching method of the underground garage as described above.
In one or more embodiments of the present application, the executable instructions are configured to:
determining an MAC address of a vehicle owner terminal, and inquiring a preset database based on the MAC address to determine a parking space number associated with the MAC address;
allocating a terminal IP address to the vehicle owner terminal, and determining a parking space IP address based on the parking space number;
determining first network equipment with direct routing information of the MAC address, and searching the parking space IP address hop by hop from the first network equipment through the terminal IP address;
and after the parking space IP address is found, connecting the network equipment passing through the hop-by-hop process to generate a vehicle searching path.
The vehicle searching method and device for the underground garage provided by the embodiment of the application have the following beneficial effects:
1. the method is realized based on the SDN controller, so that the characteristics of the SDN controller can be utilized, the programming characteristics of north direction can be further strengthened in the future, a more friendly visual interface is connected and interacted, and new functions are expanded according to the development of the future technology. Or according to the self-demand, developing software, increasing safety certification function, realizing online payment function by butting bank system, and the like
2. The SDN controller is used for carrying out unified management on the network equipment components, the network of the components can be configured in a unified and centralized mode, and the equipment can be deployed more conveniently, the equipment state can be detected timely, and damaged network equipment can be replaced.
3. Meanwhile, the method in the embodiment of the application does not need to additionally invest in research and development cost to research and develop the routing algorithm, can multiplex the relatively mature routing algorithm of the dynamic routing protocol, and reduces the research and development cost.
4. This application realizes online off-line cooperative localization, can more accurate location to the vehicle position.
5. In the application, the idle parking spaces can be inquired in advance, and the paths are given to guide the idle parking spaces.
6. The method and the device can provide a better ex-warehouse route to a certain extent according to the traffic flow.
7. The cost range is controllable, the route searching precision can be increased according to the requirement, the cost is improved along with the convenience, part of the route searching precision can be sacrificed, the cost is reduced, and meanwhile, the operation and maintenance cost and the replacement cost are reduced.
8. The IP address is used, and the IP address is bound and identified with internet-enabled terminal equipment such as a mobile phone of an owner of the vehicle and the vehicle, so that the owner of the vehicle does not need to additionally participate in a maintenance module, and the cost is reduced.
The embodiments in the present application are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (10)
1. A vehicle searching method of an underground garage is characterized by comprising the following steps:
the vehicle owner terminal accesses a wireless network created by the network equipment and accesses a vehicle searching service of the SDN controller; the network equipment is arranged above each intersection of the underground garage and has the function of establishing a wireless network;
the SDN controller determines an MAC address of the vehicle owner terminal and inquires a preset database based on the MAC address to determine a parking space number associated with the MAC address;
the SDN controller allocates a terminal IP address to the vehicle owner terminal and determines a parking space IP address based on the parking space number;
the SDN controller determines first network equipment with direct routing information of the MAC address, and searches the parking space IP address hop by hop through the terminal IP address from the first network equipment;
and after finding the parking space IP address, the SDN controller connects network equipment passing through the hop-by-hop process to generate a vehicle searching path.
2. The vehicle searching method of the underground garage according to claim 1, wherein before the vehicle owner terminal accesses a vehicle searching service of an SDN controller, the method further comprises:
the method comprises the steps that a vehicle owner terminal accesses a wireless network established by network equipment and accesses a parking service of an SDN controller;
the SDN controller records the MAC address corresponding to the vehicle owner terminal and receives the license plate number and the parking space number corresponding to the vehicle owner terminal;
and the SDN controller associates and binds the license plate number and the parking space number with the MAC address, and then stores the license plate number and the parking space number into the preset database.
3. The method of claim 2, wherein the SDN controller receives a license plate number and a parking space number corresponding to the vehicle owner terminal, and specifically comprises:
the SDN controller receives a license plate number and a parking space number which are determined by the owner terminal based on information manually input by an owner; alternatively, the first and second electrodes may be,
the SDN controller receives a parking space number and a license plate number which are collected by a camera corresponding to the network equipment; the camera is installed above the corresponding parking space of the parking space number.
4. The method of claim 2, wherein before the SDN controller receives the license plate number and the parking space number corresponding to the owner terminal, the method further comprises:
the SDN controller determines a parking space number corresponding to the vehicle owner terminal, and specifically includes:
the SDN controller determines second network equipment with the MAC address direct routing information according to the MAC address;
traversing, by the SDN controller, the parking space IP address without routing information with the second network device as a starting point to determine a parking space number closest to the second network device;
and sending the parking space number closest to the parking space number to the vehicle owner terminal.
5. The vehicle searching method of the underground garage according to claim 1, wherein before the vehicle owner terminal accesses the vehicle searching service of the SDN controller, the method further comprises:
the SDN controller allocates different address sections for different parking space areas of an underground garage, and allocates parking space IP addresses for parking spaces in the parking space area based on the address sections, and the SDN controller specifically comprises the following steps:
and allocating parking space IP addresses for the parking spaces according to the parking space numbers, wherein the smaller the parking space number is, the smaller the allocated parking space IP address number is.
6. The vehicle searching method of the underground garage according to claim 1, wherein the SDN controller generates the vehicle searching path, and specifically comprises:
the SDN controller determines a plurality of network devices passing through a hop-by-hop process and starts display screens corresponding to the network devices respectively; the left side of the display screen is a license plate number indicating area, the right side of the display screen is an arrow indicating area, and the arrow indicating area comprises an upper arrow, a lower arrow, a left arrow and a right arrow;
the SDN controller connects the network devices to form a network path, and the network path is mapped into a vehicle searching path through the display screen;
the license plate number indication area of the display screen displays the license plate number, and the arrow indication area of the display screen displays the car seeking path direction.
7. The vehicle searching method of the underground garage of claim 6, wherein the SDN controller maps the network path to the vehicle searching path through the display screen, and specifically comprises:
determining that an equal cost path exists in the network paths; wherein the equal cost path is used for indicating a bifurcation existing in the network path;
selecting the equal cost path by the following formula:
L＝R+H+1/(M-RN)
wherein, L is the weight of the equal cost path, R is the number of network devices passed by the equal cost path, H is the number of overlapping equal cost paths in a preset time period, and is used for indicating the number of times of passing the equal cost path in the preset time period, RN is a network device identification number, and M is a preset adjustment parameter;
and mapping the selected equivalent path into a vehicle searching path through the display screen.
8. The method of claim 1, wherein after the generating the vehicle-seeking path, the method further comprises:
the owner terminal accesses a routing service of the SDN controller;
the SDN controller determines a garage exit closest to the parking space number according to the parking space number and acquires an exit IP address corresponding to the garage exit;
the SDN controller determines third network equipment with direct connection routing information of the vehicle owner MAC address, and searches the exit IP address hop by hop through the parking space IP address from the third network equipment;
and connecting the network equipment passed by the hop-by-hop process to generate an ex-warehouse path.
9. The method of claim 1, wherein the method comprises the steps of,
the network equipment has a routing function and can run a dynamic routing protocol;
the SDN controller can interact with the network device through an OpenFlow protocol.
10. An underground garage's equipment of seeking car, its characterized in that, equipment includes:
a processor, and,
a memory having stored thereon an executable program that, when executed, causes the processor to perform a method of locating a vehicle in an underground garage as claimed in any one of claims 1 to 9.
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