Multi-vehicle short-range wireless ad hoc network method and vehicle-mounted device

Abstract

The application discloses a multi-vehicle short-distance wireless ad hoc network method. After discovering connectable vehicle-mounted devices, if no routing device exists in the vehicle-mounted device and the connectable vehicle-mounted devices, the vehicle-mounted device negotiates with the connectable vehicle-mounted devices, and converts one of the two into a routing device to form an ad hoc network. It can be seen that the application converts the vehicle-mounted devices of part of vehicles into routing devices, thereby realizing the ad hoc network between vehicles, and does not need to set fixed routers on roads, realizes long-distance information interaction of vehicles, and improves driving safety of vehicles on roads.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle communication technology, in particular to a multi-vehicle short-range wireless ad hoc network method and a vehicle-mounted device. BACKGROUND

[0002] With the rapid development of national economy, cars are increasingly involved in people's daily life. The rapid increase of vehicles has caused a series of social problems, such as traffic congestion, parking difficulty, frequent traffic accidents, etc. Therefore, the safe driving of vehicles, traffic management and information exchange between vehicles (such as automatic brake information, danger warning, collision warning, position information, speed information) have attracted more and more attention. The application of ad hoc network technology to vehicle-to-vehicle communication enables drivers to obtain the status information (such as speed, direction, position, brake plate pressure, etc.) of other vehicles and real-time road condition information in the beyond-visual-range, which makes the behavior judgment in the vehicle driving process more accurate and fast.

[0003] However, the existing vehicle-to-vehicle networking technology usually needs to set a center node, and the current scheme usually sets the center node on the roadside. Vehicles interact through the center node, which is limited by the setting of the road center node. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a multi-vehicle short-range wireless ad hoc network method and a vehicle-mounted device, which can realize networking communication between vehicles in a wider range.

[0005] In order to solve the above technical problems, the technical scheme adopted by the present application is:

[0006] A multi-vehicle short-range wireless ad hoc network method, after the vehicle-mounted device discovers a connectable vehicle-mounted device, if there is no routing device in the vehicle-mounted device and the connectable vehicle-mounted device, the two devices negotiate to convert one of them into a routing device to form an ad hoc network.

[0007] In order to solve the above technical problems, another technical scheme adopted by the present application is:

[0008] A multi-vehicle short-range wireless ad hoc network vehicle-mounted device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the following when executing the computer program:

[0009] After the vehicle-mounted device discovers a connectable vehicle-mounted device, if there is no routing device in the vehicle-mounted device and the connectable vehicle-mounted device, the two devices negotiate to convert one of them into a routing device to form an ad hoc network.

[0010] The beneficial effect of the present application is that: by converting part of the vehicle-mounted equipment of vehicles into routing equipment, inter-vehicle ad hoc network is realized, fixed routers do not need to be set on the road, long-distance information interaction of vehicles is realized, and driving safety of vehicles on the road is improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 A flowchart of a multi-vehicle short-range wireless ad hoc network method of an embodiment of the present application;

[0012] Fig. 2 A network diagram of inter-vehicle ad hoc network related to an embodiment of the present application;

[0013] Fig. 3 A structural diagram of a multi-vehicle short-range wireless ad hoc network vehicle-mounted equipment of an embodiment of the present application.

[0014] REFERENCE NUMERALS:

[0015] 1. A multi-vehicle short-range wireless ad hoc network vehicle-mounted equipment; 2. a processor; 3. a memory. DETAILED DESCRIPTION

[0016] To explain the technical content, the achieved purposes and effects of the present application in detail, the following will be explained in combination with embodiments and the accompanying drawings.

[0017] Please refer to Figs. 1-2 A multi-vehicle short-range wireless ad hoc network method, after the vehicle-mounted equipment discovers connectable vehicle-mounted equipment, if there is no routing equipment in the vehicle-mounted equipment and the connectable vehicle-mounted equipment, the vehicle-mounted equipment negotiates with the connectable vehicle-mounted equipment, and converts one of the two into a routing equipment to form an ad hoc network.

[0018] From the above description, the beneficial effect of the present application is that: by converting part of the vehicle-mounted equipment of vehicles into routing equipment, inter-vehicle ad hoc network is realized, fixed routers do not need to be set on the road, long-distance information interaction of vehicles is realized, and driving safety of vehicles on the road is improved.

[0019] Further, after the vehicle-mounted equipment discovers connectable vehicle-mounted equipment, if there is no routing equipment in the vehicle-mounted equipment and the connectable vehicle-mounted equipment, the vehicle-mounted equipment negotiates with the connectable vehicle-mounted equipment, and converts one of the two into a routing equipment to form an ad hoc network, which specifically includes the following steps:

[0020] S1. periodically sending a broadcast packet, and after receiving a response packet of a device in the range, executing step S2;

[0021] S2. judging whether the device sending the response packet is a child device or a routing device, if it is a routing device, becoming a child device of the device sending the response packet, and if it is a child device, executing step S3;

[0022] S3, negotiating with the device sending the reply packet who becomes the routing device, if the device sending the reply packet becomes the routing device, becoming the child device of the device sending the reply packet, if the device becomes the routing device, executing step S4;

[0023] S4, continuously periodically broadcasting the routing table information.

[0024] From the above description, it is known that part of the vehicle-mounted devices is converted into routing devices.

[0025] Further, the step S4 further comprises:

[0026] and during the period, polling whether the child device is online, if the child device is not online for more than a set time, deleting the child device information in the routing table, if the routing table is empty, executing step S1.

[0027] From the above description, it is known that when the routing table is empty, the vehicle-mounted device automatically exits the routing device state and re-negotiates with a new device.

[0028] Further, the step S4 further comprises: during the period, if the networking information of the routing device formed by the connectable vehicle-mounted device is received, interconnecting with the routing device formed by the connectable vehicle-mounted device.

[0029] From the above description, it is known that the vehicle-mounted device interconnects with other vehicle-mounted devices as routing devices, so that the ad hoc network can be established in a wider range.

[0030] Please refer to Fig. 3 A multi-vehicle short-range wireless ad hoc network vehicle-mounted device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the following steps when executing the computer program:

[0031] After discovering the connectable vehicle-mounted device, if there is no routing device in the vehicle-mounted device and the connectable vehicle-mounted device, negotiating with the connectable vehicle-mounted device, converting one of the two into a routing device to form an ad hoc network.

[0032] From the above description, it is known that the vehicle-mounted device of part of the vehicle is converted into a routing device, so that the ad hoc network between vehicles is realized, without the need to set a fixed router on the road, realizing long-distance information interaction between vehicles and improving the driving safety of vehicles on the road.

[0033] Further, after discovering the connectable vehicle-mounted device, if there is no routing device in the vehicle-mounted device and the connectable vehicle-mounted device, negotiating with the connectable vehicle-mounted device, converting one of the two into a routing device to form an ad hoc network, specifically comprising the following steps:

[0034] S1, periodically send a broadcast packet until receiving a response packet of a device in the range, and then execute step S2;

[0035] S2, determine whether the device sending the response packet is a sub-device or a routing device, if it is a routing device, then become a sub-device of the device sending the response packet, if it is a sub-device, then execute step S3;

[0036] S3, negotiate with the device sending the response packet who becomes the routing device, if the device sending the response packet becomes the routing device, then become a sub-device of the device sending the response packet, if the device becomes the routing device, then execute step S4;

[0037] S4, continuously periodically broadcast routing table information.

[0038] From the above description, it is known that part of the vehicle-mounted devices is converted into a routing device.

[0039] Further, the step S4 further comprises:

[0040] and during the period, periodically poll the sub-device whether it is online, if the sub-device is not online for more than a set time, then delete the sub-device information in the routing table, if the routing table is empty, then execute step S1.

[0041] From the above description, it is known that when the routing table is empty, the vehicle-mounted device automatically exits the routing device state and re-negotiates with a new device.

[0042] Further, the step S4 further comprises: during the period, if the networking information of the routing device formed by the connectable vehicle-mounted device is received, then interconnect with the routing device formed by the connectable vehicle-mounted device.

[0043] From the above description, it is known that the routing device formed by the connectable vehicle-mounted device is interconnected with other vehicle-mounted devices as routing devices, so that the ad hoc network can be established in a wider range.

[0044] The application is applied to the ad hoc network between vehicles on the road to communicate with each other, so as to improve the safety of vehicles on the road, and can also be used in the field of automatic driving of unmanned vehicles, and is mainly applied to a car equipped with a CC1101 wireless transmission chip. The CC1101 of TI is a design below 1GHz, which is designed to be used in extremely low power consumption RF applications. It is mainly aimed at industrial, scientific and medical (ISM) and short-range wireless communication devices (SRD). The CC1101 can provide extensive hardware support for data packet processing, data buffering, burst transmission, received signal strength indication (RSSI), clear channel assessment (CCA), link quality indication and wireless wake-up (WOR).

[0045] The CC1101 internally implements a self-organizing network protocol, enabling self-organizing networks, serial port pass-through, point-to-point star mesh networking, collision prevention, and data encryption. Based on its cascadable characteristics, it can obtain the status of vehicles over a wider range, not only judging the status information of surrounding vehicles but also judging the information of vehicles further ahead.

[0046] Please refer to Figs. 1-2 Embodiment 1 of the present invention is as follows:

[0047] A method for a multi-vehicle short-range wireless ad hoc network includes the following steps:

[0048] S1. Periodically send broadcast packets until a response packet is received from a device within range, then proceed to step S2.

[0049] S2. Determine whether the device sending the response packet is a sub-device or a routing device. If it is a routing device, then it becomes a sub-device of the device sending the response packet. If it is a sub-device, then proceed to step S3.

[0050] S3. Negotiate with the device that sent the response packet to determine which device will become the routing device. If the device that sent the response packet becomes the routing device, then the device becomes a sub-device of the device that sent the response packet. If this device becomes the routing device, then proceed to step S4.

[0051] S4. Continuously broadcast routing table information periodically. If network information of routing devices that can be connected to vehicle-mounted devices is received during this period, the routing relay of the routing devices that can be connected to vehicle-mounted devices will be interconnected. During this period, the online status of sub-devices will be polled periodically. If a sub-device is offline for more than a set time, the sub-device information will be deleted from the routing table. If the routing table is empty, step S1 will be executed.

[0052] The above method is used to form as follows Fig. 2 The network shown allows routers to communicate with each other, and each sub-device enters the network through a router.

[0053] Please refer to Fig. 3 Embodiment two of the present invention is as follows:

[0054] A vehicle-mounted device 1 for multi-vehicle short-range wireless ad hoc networking includes a memory 3, a processor 2, and a computer program stored in the memory 3 and executable on the processor 2. When the processor 2 executes the computer program, it implements the steps of the above embodiment 1.

[0055] In summary, the present invention provides a method and vehicle-mounted device for multi-vehicle short-range wireless ad hoc networking. By converting the vehicle-mounted devices of some vehicles into routing devices, ad hoc networking between vehicles is realized without the need to set up fixed routers on the road. This enables long-distance information exchange between vehicles and improves driving safety on the road.

[0056] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for a multi-vehicle short-range wireless ad hoc network, characterized in that, After discovering a connectable vehicle device, if neither the vehicle device nor the connectable vehicle device has a routing device, the vehicle device will negotiate with the connectable vehicle device to convert one of them into a routing device to form a self-organizing network. The specific steps include: S1. Periodically send broadcast packets until a response packet is received from a device within range, then proceed to step S2. S2. Determine whether the device sending the response packet is a sub-device or a routing device. If it is a routing device, then it becomes a sub-device of the device sending the response packet. If it is a sub-device, then proceed to step S3. S3. Negotiate with the device that sent the response packet to determine which device will become the routing device. If the device that sent the response packet becomes the routing device, then the device becomes a sub-device of the device that sent the response packet. If this device becomes the routing device, then proceed to step S4. S4. Continuously broadcast routing table information periodically; Step S4 further includes: if networking information of a routing device that can be connected to the vehicle-mounted device is received during the process, then the routing relay of the routing device that can be connected to the vehicle-mounted device is interconnected.

2. The method for a multi-vehicle short-range wireless ad hoc network according to claim 1, characterized in that, Step S4 further includes: During the period, the system polls whether the sub-devices are online. If a sub-device is offline for more than the set time, the sub-device information is deleted from the routing table. If the routing table is empty, step S1 is executed.

3. A vehicle-mounted device for a multi-vehicle short-range wireless ad hoc network, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it achieves the following: After discovering a connectable vehicle device, if neither the vehicle device nor the connectable vehicle device has a routing device, the vehicle device will negotiate with the connectable vehicle device to convert one of them into a routing device to form a self-organizing network. The specific steps include: S1. Periodically send broadcast packets until a response packet is received from a device within range, then proceed to step S2. S2. Determine whether the device sending the response packet is a sub-device or a routing device. If it is a routing device, then it becomes a sub-device of the device sending the response packet. If it is a sub-device, then proceed to step S3. S3. Negotiate with the device that sent the response packet to determine which device will become the routing device. If the device that sent the response packet becomes the routing device, then the device becomes a sub-device of the device that sent the response packet. If this device becomes the routing device, then proceed to step S4. S4. Continuously broadcast routing table information periodically; Step S4 further includes: if networking information of a routing device that can be connected to the vehicle-mounted device is received during the process, then the routing relay of the routing device that can be connected to the vehicle-mounted device is interconnected.

4. A vehicle-mounted device for a multi-vehicle short-range wireless ad hoc network according to claim 3, characterized in that, Step S4 further includes: During the period, the system polls whether the sub-devices are online. If a sub-device is offline for more than the set time, the sub-device information is deleted from the routing table. If the routing table is empty, step S1 is executed.

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