CN111083666B - Network node sequencing method, network node and network system - Google Patents
Network node sequencing method, network node and network system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Abstract
The invention provides a network node sequence marking method, a network node and a network system, wherein corresponding I/O interfaces for node sequence marking are reserved on each network node in a network, each I/O interface has at least two level connection states, and therefore, the independent sequence marking of the sequence number of the network node is realized based on the level connection state combination result of the I/O interfaces of each network node, and the network node sequence marking method has the advantages of high reliability and low cost.
Description
Technical Field
The present invention relates to the field of network communications technologies, and in particular, to a network node ordering method, a network node, and a network system.
Background
Keyless Entry and Start (PEPS) system based on intelligent terminals is an important development direction of next-generation automobiles. Bluetooth (BLE) devices are widely used in PEPS systems due to their low cost, low power consumption, short latency, and high reliability. The Bluetooth PEPS (BLE-PEPS) system uses the intelligent terminal as a vehicle virtual key, so that a special vehicle key is omitted, and keyless entry and starting are realized.
The existing common BLE-PEPS network node sequencing method mainly comprises the following two steps:
first, the main controller controls the network sub-nodes through the multi-path LIN buses respectively to form the standard sequence. The LIN bus is a low-cost serial communication network defined for the distributed electronic system of the automobile, is a supplement to other automobile multipath networks such as a main Controller Area Network (CAN), and is suitable for application without excessively high requirements on the bandwidth, performance or fault tolerance function of the network. The LIN bus is based on SCI (UART) data format, with a single master/multiple slave mode, a special case in UART. Obviously, the sequencing method needs the main controller to support the multi-path LIN driving, and the cost of the whole sequencing scheme is greatly increased.
Second, bluetooth signals are positioned relative to each other to form a sequence. The sequence identification method is performed by depending on Bluetooth signal intensity, and when Bluetooth interference exists in the environment of any child node, the reliability of the formed sequence identification result is affected.
Therefore, a network node order marking scheme is needed, which can realize network node order marking with high reliability and low cost so as to be suitable for BLE-PEPS network node order marking.
Disclosure of Invention
The invention aims to provide a network node sequence marking method, a network node and a network system, which can realize high-reliability and low-cost network node sequence marking.
In order to achieve the above object, the present invention provides a method for ordering network nodes, comprising:
reserving corresponding I/O interfaces for node sequence on each network node in a network, wherein each I/O interface has at least two level connection states;
placing the reserved I/O interfaces on each network node on corresponding level connection states to form an I/O interface level connection state combination result of each network node, wherein the I/O interface level connection state combination results of any two network nodes in the network are different; the method comprises the steps of,
and configuring corresponding labels for the network nodes according to the combination result of the I/O interface level connection states of the network nodes so as to sequence the network nodes in the network.
Optionally, at least two I/O interfaces for node sequence are reserved on each network node in the network, and the number of the I/O interfaces reserved on each network node is the same.
Optionally, at least two level connection states of each I/O interface are selected from two or three of three level connection states of power connection, ground connection and suspension; and when the number of the I/O interfaces reserved by each network node is N, N is more than or equal to 2, and each I/O interface has two level connection states, the network can support 2 N A node number, wherein when the number of the I/O interfaces reserved by each network node is N, N is more than or equal to 2, and each I/O interface has three level connection states, the network can support 3 N The individual nodes are numbered.
Optionally, the labels of all the network nodes in the network are arranged in order from small to large and without repetition, and when the total number of network nodes in the network is smaller than the number of node labels supportable by the network, the number of I/O interfaces in suspension in the network node with the smaller label is greater than the number of I/O interfaces in suspension in the network node with the larger label.
Optionally, the I/O interface level connection status combination result of each network node is detected by the internal circuit of the network node through an analog-to-digital conversion manner, or is detected by the internal circuit of the network node through a combination level detection manner.
Based on the same inventive concept, the invention also provides a network node for implementing the network node order method of the invention, corresponding I/O interfaces for node order are reserved on the network node, each I/O interface on the network node has at least two level connection states, each I/O interface on the network node is placed in a corresponding level connection state to form an I/O interface level connection state combination result of the network node, and the label of the network node in the network accessed by the network node is determined by the I/O interface level connection state combination result of the network node.
Optionally, the network node further has an analog-to-digital converter or a combined level detection circuit connected to all the I/O interfaces of the network node, where the analog-to-digital converter is configured to detect, by means of analog-to-digital conversion, a combined result of I/O interface level connection states of the network node, and the combined level detection circuit is configured to detect, by means of combined level detection, a combined result of I/O interface level connection states of the network node.
Based on the same inventive concept, the invention also provides a network system, which comprises a plurality of network nodes, all the network nodes are connected to the same network and are numbered orderly, the I/O interface level connection state combinations of any two network nodes in the network are different, and the numbers of the network nodes depend on the I/O interface level connection state combination results of the network nodes.
Optionally, at least two I/O interfaces for node sequence are reserved on each network node in the network system, and the number of the I/O interfaces reserved on each network node is the same.
Optionally, at least two level connection states of each I/O interface are selected from two or three of three level connection states of power connection, ground connection and suspension; when the number of the I/O interfaces reserved by each network node is N, N is more than or equal to 2, and each I/O interface has two level connection states, the network system can support 2 N The number of the nodes is equal to or greater than 2, and when the number of the I/O interfaces reserved by each network node is N and each I/O interface has three level connection states, the network system can support 3 N The individual nodes are numbered.
Optionally, the labels of all the network nodes are arranged in order from small to large without repetition, and when the total number of the network nodes is smaller than the number of the labels of the nodes that can be supported by the network system, the number of the I/O interfaces in suspension in the network node with the smaller label is greater than the number of the I/O interfaces in suspension in the network node with the larger label.
Optionally, the network node is a bluetooth node, and the network system is a bluetooth network system.
Optionally, the network system is an automobile Bluetooth keyless entry and starting system, and the network nodes are distributed on an automobile; or the network system is an intelligent home system, and the network nodes are distributed in a home environment.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
according to the technical scheme, corresponding I/O interfaces for node sequence identification are reserved on each network node in a network, each I/O interface has at least two level connection states, and each reserved I/O interface on each network node is further placed on the corresponding level connection state, so that the I/O interface level connection state combination results of any two network nodes in the network are different, and therefore corresponding labels are configured for each network node according to the I/O interface level connection state combination results of each network node, so that each network node sequence identification in the network is realized. The technical scheme of the invention realizes the sequence number division of all network nodes in the network based on the level connection state combination (namely input level state combination) result of the I/O interfaces of all network nodes, and can realize rapid, high-reliability and lower-cost node distinction. The technical scheme of the invention is suitable for network node sequence identification in network systems such as an automobile Bluetooth keyless entry and start system, an intelligent home system and the like.
Furthermore, each I/O interface has three level connection states of power supply, suspension and ground, and compared with each I/O interface which has two level connection states of power supply and ground, the I/O interface utilization rate of the network node can be greatly increased, so that the network can relatively support more network node access, and the capacity of the network is relatively increased.
Further, when the number of network nodes is small, the suspended state does not need to be connected, so that the more level connection states of the suspended state can be configured on the network node position with the small number, the wire harness is saved, and the wire harness cost is minimized.
Drawings
Fig. 1 is a flow chart of a network node ordering method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a network node according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a network system according to an embodiment of the present invention.
Detailed Description
The technical scheme provided by the invention is further described in detail below with reference to the attached drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. In addition, the network node in the present application is a module or a device capable of accessing a corresponding network, and may include a radio frequency transmitter and a radio frequency receiver for wirelessly communicating with a main controller in the network, and a node controller connected with the radio frequency transmitter and the radio frequency receiver, where the node controllers in the two network nodes may be connected to each other by hand. Each network node may also contain other functional modules such as a display screen, indicator lights, etc. Depending on the nature and functionality of the network, these network nodes in the network may be workstations, intelligent mobile terminals, personal computers, servers, printers and other network-connectable devices, etc. that have their own unique labels. The whole network is composed of a plurality of network nodes, and the network nodes are connected by communication lines to form a certain geometrical relationship, namely the network topology.
Referring to fig. 1, an embodiment of the present invention provides a network node ordering method, which includes:
s1, reserving corresponding I/O interfaces for node sequence on each network node in a network, wherein each I/O interface has at least two level connection states;
s2, placing each I/O interface reserved on each network node on a corresponding level connection state to form an I/O interface level connection state combination result of each network node, wherein the I/O interface level connection state combination results of any two network nodes in the network are different;
s3, according to the combination result of the I/O interface level connection state of each network node, configuring corresponding labels for each network node so as to sequence each network node in the network.
In step S1, please refer to fig. 2, N I/O interfaces for node sequence (i.e. I/O interfaces for signal input and output, which may also be referred to as PINs PIN) may be reserved on each network node in the network, denoted as I/o_1-I/o_n, where N is greater than or equal to 2, and the number of I/O interfaces reserved on each network node in the network is the same. At least two level connection states of each I/O interface are selected from two or three of power connection, grounding and suspending. When the number of the I/O interfaces reserved by each network node is N, N is more than or equal to 2, and each I/O interface has two level connection states, the network can support 2 N A node number, wherein when the number of the I/O interfaces reserved by each network node is N, N is more than or equal to 2, and each I/O interface has three level connection states, the network can support 3 N The number of each node is equal to that of each I/O interface, namely, each I/O interface has three level connection states of power supply, suspension and ground, compared with the situation that each I/O interface has two level connection states of power supply and ground, the I/O interface utilization rate of the network node can be greatly increased on the one hand, and on the other hand, the network can relatively support more network node access, and the capacity of the network is relatively increased.
In step S2, the I/O interfaces reserved on each network node in the network for node sequence are connected to a corresponding power supply, or put in a suspended state, or grounded, so that the I/O interfaces reserved on each network node for node sequence are put in a corresponding level connection state, and further, the internal circuit of each network node can detect the level connection state combination result of the I/O interfaces reserved by the internal circuit of each network node and formed by the level connection state of the I/O interfaces reserved by the internal circuit of each network node for node sequence in an analog-to-digital conversion mode or a combined level detection mode. Wherein each network node has a specific I/O interface level connection status combination result, and the I/O interface level connection status combination results of any two network nodes in the network are different.
In step S3, the labels of all the network nodes in the network may be arranged in order from small to large and without repetition, and when the total number of network nodes in the network is smaller than the number of node labels supportable by the network, the number of I/O interfaces in suspension in the network node with the smaller label is greater than the number of I/O interfaces in suspension in the network node with the larger label.
With 9 network nodes in the network, each network node has two I/O interfaces I/o_1 and I/o_2 for node sequencing, each I/O interface has three level connection states of power connection, ground connection and suspension, and the results in step S2 and step S3 of the network node sequencing method of the implementation are shown in table 1 below.
Table 1, sequence case when there are 9 network nodes in the network
| Level connection state of I/O_1 interface | Level connection state of I/O_2 interface | Node sequence number |
| Grounded (earth) | Grounded (earth) | 1 |
| Grounded (earth) | Suspended in air | 2 |
| Grounded (earth) | Connecting power supply | 3 |
| Suspended in air | Grounded (earth) | 4 |
| Suspended in air | Suspended in air | 5 |
| Suspended in air | Connecting power supply | 6 |
| Connecting power supply | Grounded (earth) | 7 |
| Connecting power supply | Suspended in air | 8 |
| Connecting power supply | Connecting power supply | 9 |
In addition, because the suspended state does not need to be connected, when the number of nodes is small, in order to minimize the cost of the wire harness, more suspended states can be configured at the position with smaller reference numbers, so that the wire harness can be saved by arranging more I/O interfaces in the suspended state. For example, when there are only 5 nodes, as shown in table 2 below, two I/O interfaces of network node No. 1 are all suspended, and network nodes No. 2 to 5 are only suspended with one I/O interface, i.e. the number of I/O interfaces suspended in network node No. 1 is greater than the number of I/O interfaces suspended in other network nodes with larger labels. In this case, the lower harness cost can be realized only by grounding the I/O interface I/O_2 of the No. 2 network, the I/O interface I/O_1 of the No. 3 network node, the I/O interface I/O_2 of the No. 4 network node and the I/O interface I/O_1 of the No. 5 network node.
Table 2, sequence case when there are 5 network nodes in the network
| Level connection state of I/O_1 interface | Level connection state of I/O_2 interface | Node sequence number |
| Suspended in air | Suspended in air | 1 |
| Suspended in air | Grounded (earth) | 2 |
| Grounded (earth) | Suspended in air | 3 |
| Suspended in air | Power supply | 4 |
| Power supply | Suspended in air | 5 |
It should be noted that, in this embodiment, when the I/O interfaces of the network nodes are connected to the power supply, the power supply connected to the I/O interfaces of the network nodes is the same high level or the same low level, so that the corresponding power supply can be provided to the I/O interfaces of the network nodes by the same power supply device, so that the manufacturing cost of the power supply device is reduced, and the sequencing cost is further reduced. In other embodiments of the present invention, in the case of diversified power supply devices and sufficient power supply device capabilities, the level of the power source connected to the I/O interface of each network node may also be different, and each I/O interface may also switch between multiple power source connections with different levels, so that the network may support more node labels.
In summary, in the network node ordering method of this embodiment, a corresponding I/O interface for node ordering is reserved on each network node in the network, and each I/O interface has at least two level connection states, and each I/O interface reserved on each network node is further placed on a corresponding level connection state, so that the I/O interface level connection state combination results of any two network nodes in the network are different, and therefore, corresponding reference numerals are configured for each network node according to the I/O interface level connection state combination results of each network node, so as to order each network node in the network. The method of the embodiment can realize rapid, high-reliability and lower-cost node distinguishing, and can be suitable for network node sequencing in a network system such as an automobile Bluetooth keyless entry and starting system, an intelligent home system and the like.
Referring to fig. 2, the present embodiment further provides a network node for implementing the network node ordering method of the present embodiment, where N corresponding I/O interfaces for node ordering are reserved on the network node, denoted as I/o_1, I/o_ …, and I/o_n, where N is an integer and N is greater than or equal to 2. Each of the I/O interfaces I/o_1, I/o_ …, I/o_n on the network node has at least two level connection states, and each of the I/O interfaces has at least two level connection states selected from two or three of a power-on, a ground, and a suspended level connection state. Each of the I/O interfaces I/o_1, I/o_2, …, I/o_n on the network node is placed in a respective level connection state to constitute a unique I/O interface level connection state combination result for the network node, and the number of the network node in the network to which it is connected is determined by the I/O interface level connection state combination result for the network node.
Optionally, the network node further has an analog-to-digital converter (not shown) or a combined level detection circuit (not shown) connected to all the I/O interfaces I/o_1, I/o_2, … and I/o_n of the network node, where the analog-to-digital converter (not shown) is configured to detect, by means of analog-to-digital conversion, an I/O interface level connection status combination result of the network node, and the combined level detection circuit is configured to detect, by means of combined level detection, the I/O interface level connection status combination result of the network node.
Referring to fig. 3, the present embodiment also provides a network system, which includes M network nodes as described in the present embodiment, where the M network nodes are accessed to the same network and are numbered sequentially. In this embodiment, the numbers of M network nodes are arranged in order from small to large and no repetition, and are denoted as network node 1, network nodes 2 and … …, and network node M, where M is greater than or equal to 2.
The network system of the embodiment further includes a master node 0, where the network node 1, the network nodes 2, … …, and the network node M are all sub-nodes of the network system, and may be communicatively connected to the master node 0 through a wireless communication manner such as bluetooth, or may be communicatively connected to the master node 0 through a communication bus such as a CAN bus or a LIN bus, so as to receive data from the master node 0 and transmit data to the master node 0.
The I/O interfaces of the network nodes in the network system of this embodiment are placed in specific level connection states (such as ground, power connection or floating), so as to form I/O interface level connection state combination results of the network nodes, where the I/O interface level connection state combination results of any two network nodes are different, and the labels of the network nodes depend on the I/O interface level connection state combination results of the network nodes.
Referring to fig. 2, at least two I/O interfaces for node sequence are reserved on each network node in the network system of the present embodiment, and the number of the I/O interfaces reserved on each network node is the same. Each I/O interface has at least two level connection states, and is selected from two or three of three level connection states of power connection, grounding and suspension. When the number of the I/O interfaces reserved by each network node is N, N is more than or equal to 2, and each I/O interface has two level connection states, the network system can support 2 N The number of the nodes is equal to or greater than 2, and when the number of the I/O interfaces reserved by each network node is N and each I/O interface has three level connection states, the network system can support 3 N The individual nodes are numbered.
Optionally, when the total number of network nodes of the network system of the embodiment is smaller than the number of node labels that can be supported by the network system, the number of I/O interfaces in suspension in the network node with the smaller label is greater than the number of I/O interfaces in suspension in the network node with the larger label.
The network system of the embodiment may be various bluetooth network systems, for example, an automobile bluetooth keyless entry and startup system or an intelligent home system, and the network nodes and the master node are bluetooth nodes. When the network system of the embodiment is an automobile Bluetooth keyless entry and start system, the network nodes are distributed at different positions of an automobile, and when the network system of the embodiment is an intelligent home system, the network nodes are distributed at different positions of a home environment.
The network system of the embodiment is built by the network nodes of the embodiment, so that the autonomous sequence of the sequence numbers of the network nodes can be realized based on the level connection state of the I/O interfaces of each network node, and the sequence numbers of the network nodes in networks with different network node numbers can be met by reserving the required number of the I/O interfaces on each network node. And for the network system with only 9 nodes and below, only two I/O interfaces are reserved on each network node, so that the autonomous sequence of the sequence numbers of the network nodes can be realized, and the method has the advantages of high reliability and low cost.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (12)
1. The network node sequencing method is characterized by being used for a Bluetooth keyless entry and starting system, and comprises the following steps of:
reserving corresponding I/O interfaces for node sequence on each network node in a network, wherein each I/O interface has at least two level connection states;
placing the reserved I/O interfaces on each network node on corresponding level connection states to form an I/O interface level connection state combination result of each network node, wherein the I/O interface level connection state combination results of any two network nodes in the network are different; the method comprises the steps of,
according to the combination result of the I/O interface level connection states of the network nodes, the serial numbers of all the network nodes in the network are divided, and corresponding labels are configured for the network nodes so as to realize the autonomous sequence of the serial numbers of the network nodes in the network.
2. The method of claim 1, wherein at least two I/O interfaces for node ordering are reserved on each network node in the network, and the number of I/O interfaces reserved on each network node is the same.
3. The network node ordering method of claim 2, wherein each I/O interface has at least two level connection states selected from two or three of three level connection states of power, ground and suspended; and when the number of the I/O interfaces reserved by each network node is N, N is more than or equal to 2, and each I/O interface has two level connection states, the network can support 2 N A node number, wherein when the number of the I/O interfaces reserved by each network node is N, N is more than or equal to 2, and each I/O interface has three level connection states, the network can support 3 N The individual nodes are numbered.
4. A network node ordering method according to claim 2 or 3, characterized in that the labels of all the network nodes in the network are arranged in a small to large and non-repeating order, and when the total number of network nodes in the network is smaller than the number of node labels that the network can support, the number of I/O interfaces in suspension in a network node with a smaller label is larger than the number of I/O interfaces in suspension in a network node with a larger label.
5. The method of claim 1, wherein the I/O interface level connection status combination result of each network node is detected by an internal circuit of the network node through analog-to-digital conversion or by an internal circuit of the network node through combination level detection.
6. A network node for implementing the network node ordering method according to any one of claims 1-5, characterized in that a corresponding I/O interface for node ordering is reserved on the network node, each I/O interface on the network node has at least two level connection states, each I/O interface on the network node is placed in a corresponding level connection state to form an I/O interface level connection state combination result of the network node, and a label of the network node in the network to which the network node is connected is determined by the I/O interface level connection state combination result of the network node.
7. The network node of claim 6, wherein the network node further has an analog-to-digital converter or a combined level detection circuit connected to all of the I/O interfaces of the network node, the analog-to-digital converter being configured to detect an I/O interface level connection status combination result of the network node by analog-to-digital conversion, the combined level detection circuit being configured to detect an I/O interface level connection status combination result of the network node by combined level detection.
8. A network system, characterized in that the network system is a bluetooth keyless entry and start network system and comprises a plurality of network nodes according to claim 6 or 7, all the network nodes are accessed to the same network and are numbered sequentially, the I/O interface level connection state combinations of any two network nodes in the network system are different, and the number of each network node depends on the I/O interface level connection state combination result of each network node.
9. The network system of claim 8, wherein at least two I/O interfaces for node ordering are reserved on each network node in the network system, and the number of I/O interfaces reserved on each network node is the same.
10. The network system of claim 8, wherein each of the I/O interfaces has at least two level connection states selected from two or three of a power-on, a ground, and a floating level connection state; and when the number of the I/O interfaces reserved by each network node is N, N is more than or equal to 2, and each I/O interface has two typesIn the level connection state, the network system can support 2 N The number of the nodes is equal to or greater than 2, and when the number of the I/O interfaces reserved by each network node is N and each I/O interface has three level connection states, the network system can support 3 N The individual nodes are numbered.
11. The network system of claim 10, wherein the labels of all of the network nodes are arranged in a small to large order without repetition, and wherein when the total number of network nodes is less than the number of node labels supportable by the network system, the number of I/O interfaces in suspension in a network node with a smaller label is greater than the number of I/O interfaces in suspension in a network node with a larger label.
12. The network system of claim 8, wherein the network system is a bluetooth keyless entry and start system for an automobile, the network nodes being distributed on the automobile; or the network system is an intelligent home system, and the network nodes are distributed in a home environment.
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