CN111224885B - Node order marking method, node order marking system and vehicle-mounted keyless system - Google Patents
Node order marking method, node order marking system and vehicle-mounted keyless system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/34—Flow control; Congestion control ensuring sequence integrity, e.g. using sequence numbers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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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
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40234—Local Interconnect Network LIN
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a node sequence marking method, a node sequence marking system and a vehicle-mounted keyless system, wherein each node stores a sequence number label in a received message after receiving a message from a previous node, and further takes the sum of the sequence number label and a preset value as a new sequence number label to send the message with the updated sequence number label to the next node. Therefore, the first node can adopt a single path to be sequentially connected with other nodes in series without supporting multi-path driving, so that on one hand, the cost is reduced, on the other hand, as each node is sequentially connected, the sequence is marked by adopting an incremental sequence number label, the Bluetooth signal intensity is not depended, and the reliability of the sequence is high.
Description
Technical Field
The invention relates to the technical field of intelligent keys, in particular to a node sequence marking method, a node sequence marking system and a vehicle-mounted keyless system.
Background
In a vehicle-mounted keyless system, a plurality of BLE-PEPS sub-nodes are arranged on each part of a vehicle body, and Bluetooth keys are positioned through signal intensities measured by different BLE-PEPS sub-nodes. Therefore, multiple BLE-PEPS sub-nodes need to be ordered to determine where they are located. The existing common BLE-PEPS node sequencing methods mainly comprise two methods: the first method is to adopt a star structure, namely, a main control supports multi-path LIN driving, and sub-nodes are respectively controlled through multi-path LIN lines, so that a standard sequence is formed; this approach requires the master control to support multiple LIN drives, which would greatly increase the cost of the overall sequencing scheme. The second method is to locate the sequence by adopting Bluetooth signals, the method is performed by relying on the strength of the Bluetooth signals when the sequence is marked by the nodes, and when Bluetooth interference exists in a marked area (such as a factory), the problem of lower reliability of the sequence can occur.
Disclosure of Invention
The invention aims to provide a node sequence marking method, a node sequence marking system and a vehicle-mounted keyless system, so as to solve the problems of high cost and low reliability of the existing node sequence marking system.
In order to solve the technical problems, the invention provides a node sequencing method, which is used in a system in which a plurality of sub-nodes are connected in turn, and comprises the following steps:
the nodes sequentially send messages with sequence number labels, wherein each node except the first node and the last node stores the sequence number label in the received message after receiving the message from the previous node, and further takes the sum of the sequence number label and a preset value as a new sequence number label to send the message with the new sequence number label to the next node;
after receiving a message from a previous node, the last node stores a sequence number label in the received message, and further sends a sequencing notice to the first node;
and after receiving the ordering notification, the first node confirms that ordering calibration of all the nodes is completed.
Optionally, in the method for ordering nodes, after the first node receives the ordering notification, sending an inspection command to all other nodes, after all other nodes receive the inspection command sent by the first node, reporting corresponding sequence number labels to the first node, and after the first node receives the sequence number labels of all other nodes, confirming that ordering calibration of all the nodes is completed.
Optionally, in the node sequence marking method, when all other nodes report corresponding sequence number labels to the first node, reporting sending time is delayed according to the stored sequence number labels.
Optionally, in the node sequence marking method, if the first node fails to receive all other sequence numbers of the nodes and the current retry sequence number is smaller than N, the retry node sequence marking is returned, and one is added to the current retry sequence number; wherein the preset initial value of the retry sequence number is 0, and N is a natural number.
Optionally, in the node ordering method, the ordering notification and/or the inspection command is a CAN message.
Optionally, in the node ordering method, the message further includes: the command feature and the check code are used for checking the sequence number tag and the command feature.
In order to solve the technical problem, the invention also provides a node order system, which comprises a plurality of nodes connected in sequence, wherein a first child node is connected with the main node;
the node ordering system is configured to:
the nodes sequentially send messages with sequence number labels, wherein each node except the first node and the last node stores the sequence number label in the received message after receiving the message from the previous node, and further takes the sum of the sequence number label and a preset value as a new sequence number label to send the message with the new sequence number label to the next node; after receiving a message from a previous node, the last node stores a sequence number label in the received message, and further sends a sequencing notice to the first node; and after receiving the ordering notification, the first node confirms that ordering calibration of all the nodes is completed.
Optionally, in the node sequence system, all the nodes are sequentially connected through LIN lines or hard wires attached with private communication protocols respectively.
Optionally, in the node sequence system, a first node includes a master port, a last node includes a slave port, and the other nodes except for the first node and the last node include a master port and a slave port; the master ports of the other nodes except the last node are connected with the slave ports of the next node, so as to sequentially transmit the messages.
Optionally, in the node sequence system, a first node is a master node, and other nodes are child nodes; alternatively, all of the nodes are child nodes.
In order to solve the technical problems, the invention also provides a vehicle-mounted keyless system which comprises a plurality of BLE-PEPS nodes which are sequentially connected, and all the BLE-PEPS nodes realize sequencing calibration by using the node sequencing method.
In summary, in the node sequence marking method, the node sequence marking system and the vehicle-mounted keyless system provided by the invention, after each node receives a message from a previous node, the sequence number label in the received message is stored, and then the sum of the sequence number label and a preset value is used as a new sequence number label, and the message with the updated sequence number label is sent to the next node. Therefore, the first node can adopt a single path to be sequentially connected with other nodes in series without supporting multi-path driving, so that on one hand, the cost is reduced, on the other hand, as each node is sequentially connected, the sequence is marked by adopting an incremental sequence number label, the Bluetooth signal intensity is not depended, and the reliability of the sequence is high.
Drawings
Those of ordinary skill in the art will appreciate that the figures are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention. Wherein:
fig. 1 is a schematic diagram of a node ordering system according to an embodiment of the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific embodiments thereof in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are not drawn to scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments.
As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification and the appended claims, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.
The invention provides a node sequence marking method, a node sequence marking system and a vehicle-mounted keyless system, which are used for solving the problems of high cost and low reliability of the existing node sequence marking system. The node sequence marking method and the node sequence marking system provided by the invention are described below with reference to the accompanying drawings. Fig. 1 is a schematic diagram of a node ordering system according to an embodiment of the present invention.
Referring to fig. 1, the present invention provides a node ordering system, which includes: a plurality of nodes (a master node 100 and child nodes 101 to 109) connected in sequence. In an exemplary embodiment, the node marking system includes 1 main node 100 and 9 sub-nodes 101-109, the main node 100 is connected with a first sub-node 101 through a LIN line, and all the sub-nodes 101 are sequentially connected through LIN lines.
Based on the node order marking system, the invention provides a node order marking method, which comprises the following steps:
step S1: the nodes sequentially send messages with sequence number labels, wherein each node (sub-node 101-108) except the first node and the last node (main node 100 and sub-node 109) stores the sequence number label in the received message after receiving the message from the previous node, and further takes the sum of the sequence number label and a preset value as a new sequence number label to send the message with the new sequence number label (namely the updated sequence number label) to the next node;
step two S2: after receiving a message from a previous node (child node 108), the last node (child node 109) stores a sequence number tag in the received message, and sends a ranking notification to the first node (master node 100);
step three S3: the first of the nodes (master node 100) confirms that the ordering calibration of all the nodes is completed after receiving the ordering notification.
In one example, in step S1, the preset initial value of the sequence number tag is 1, and the preset value is 1. So configured, the sequence number tag in the message sent by the master node 100 to the second node (the child node 101) is 1, the second node (the child node 101) records the value 1 of the sequence number tag to the EEPROM after receiving the message of the master node 100, then adds one on the basis of the original sequence number tag, and then adds the updated sequence number tag (2) to the message sent by the third node (the child node 102).
After receiving the message of the second node (sub node 101), the third node (sub node 102) records the value 2 of the sequence number label into the EEPROM, then adds one on the basis of the original sequence number label, and then adds the updated sequence number label (3) … to the message sent to the fourth node (sub node 103), and so on until the tenth node (namely the last sub node 109) receives the message of the ninth node (sub node 108), records the value 9 of the sequence number label into the EEPROM, and then sends the sorting notification to the main node 100. Alternatively, the configuration of the child node 109 may be identical to that of the child nodes 101 to 108, after the child node 109 receives the message of the child node 108, the value of the sequence number label is recorded to be 9 to the EEPROM, then one is added on the basis of the original sequence number label, and then the message is sent to the next node in advance, however, since the child node 109 is the last node and is not connected with other nodes afterwards, the sending of the node 109 cannot be successful, after a certain time, namely, the pre-sending step is stopped overtime, and then a sorting notification is sent to the master node 100, preferably, the sorting notification is a CAN message. In some embodiments, the master node 100 may confirm that the ordering calibration of all the nodes is complete after receiving the ordering notification.
Preferably, in some other embodiments, in step S3, after receiving the ordering notification, the master node 100 sends an inspection command to all other nodes (child nodes 101 to 109), and after receiving the inspection command sent by the master node 100, all other nodes report corresponding sequence numbers to the master node 100, respectively, and after receiving the sequence numbers of all other nodes, the master node 100 confirms that ordering calibration of all the nodes is completed. Preferably, the inspection command is a CAN message. Preferably, when all other nodes report corresponding sequence number labels to the master node 100, reporting transmission time is delayed according to the stored sequence number labels. It can be understood that, in step S1, the sequence number label is not limited to 1, and the preset value is not limited to 1, for example, the initial value of the sequence number label may be 100, and the preset value is 20, and after the master node 100 sends the message, the sequence number labels sequentially stored by each child node are respectively: 100. 120, 140, …, 260. Based on this, each child node delays according to the stored sequence number label, for example, 100ms, 120ms, 140ms … ms, and then reports the corresponding sequence number to the master node 100. After receiving the serial numbers of all other nodes, the master node 100 can confirm that the ordering calibration of all the nodes is completed.
Optionally, if the master node 100 fails to receive all other sequence numbers of the nodes and the current retry sequence number is less than N, returning a retry node sequence number, and adding one to the current retry sequence number; the retry node sequence is to return to the execution of step one S1 to step three S3, wherein the preset initial value of the retry sequence is 0, and n is a natural number. When there is a fault or other problems in the node ordering system, the master node 100 fails to receive the serial numbers of all the child nodes, and tries to retry at this time, the retry serial number is initially 0, if the first execution of the ordering calibration process of the first to third steps S1 to S3 fails, after the retry execution of the first to third steps S1 to S3 is returned, one is added to the retry serial number, if the retry fails again, the retry execution of the first to third steps S1 to S3 … is returned again, and so on until the retry serial number is equal to N, that is, the retry is not tried any more. Alternatively, N is 3, i.e. the process of attempting a retry is retried a maximum of 3 times. Of course, those skilled in the art can also select different values of N according to practical situations.
Optionally, the message further includes: the command feature and the check code are used for checking the sequence number tag and the command feature. The whole message is specially defined for the sub-node sequence, and other components (such as NFC) cannot recognize the message, so that the message is ignored.
Optionally, in the node ordering system, a first node (master node 100) includes a master port M, a last node (child node 109) includes a slave port S, and the nodes except for the first and last two nodes each include a master port M and a slave port S; the master ports M of all the other nodes except the last one (child node 109) are connected to the slave ports S of the next one for transmitting the messages in turn. Of course, the master node 100 may also include a slave port S, and the last node (child node 109) may also include a master port M, that is, all nodes include a master port M and a slave port S, so all nodes are configured identically, and the nodes are convenient for replacement.
Furthermore, the invention also provides a vehicle-mounted keyless system which comprises a plurality of BLE-PEPS nodes which are connected in sequence, and all the BLE-PEPS nodes realize sequencing calibration by using the node sequencing method.
In summary, the node sequence marking method, the node sequence marking system and the vehicle-mounted keyless system provided by the invention can directly realize the node sequence marking in the module with two paths of LINs (namely a main port and a slave port), and the possibility of error sequence marking caused by interference when the Bluetooth signal is used for node sequence marking is avoided. The method has the advantages that the child nodes are combined with the vehicle body arrangement information, the main controller can recognize the position of each child node in the system, and the child nodes are located at the positions of the vehicle body, so that the Bluetooth signals received by the specific child nodes are classified in position, and the position of the Bluetooth key is judged. It will be appreciated that in some alternative node order systems, it is not limited that the nodes must be connected by LIN lines, and those skilled in the art may also directly use other connection lines, such as hard lines with a private communication protocol, and use a private protocol (or simulate LIN protocol), and implement the node order by using a similar method, which is not limited in this regard.
Of course, it will be understood by those skilled in the art that the above-mentioned node ordering method, node ordering system and vehicle-mounted keyless system using the main node and the sub-node are only an application example of the node ordering method, the node ordering system and the vehicle-mounted keyless system provided in this embodiment, but not limited to the node, and the node ordering method, the node ordering system and the vehicle-mounted keyless system provided in this embodiment may also be applied to the case that all the nodes are sub-nodes. If the first node sending the message with the sequence number label is not limited to the master node, it may be a child node, and other child nodes are sequentially connected with the first child node, and the master node 100 in the steps one S1 to three S3 is replaced by a child node, so that the sequence of the child nodes may also be implemented.
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 (10)
1. The node order marking method is used in a system with a plurality of nodes connected in sequence, and is characterized by comprising the following steps:
the nodes sequentially send messages with sequence number labels, wherein each node except the first node and the last node stores the sequence number label in the received message after receiving the message from the previous node, and further takes the sum of the sequence number label and a preset value as a new sequence number label to send the message with the new sequence number label to the next node;
after receiving a message from a previous node, the last node stores a sequence number label in the received message, and further sends a sequencing notice to the first node;
and after receiving the ordering notification, the first node confirms that ordering calibration of all the nodes is completed.
2. The method for ordering nodes according to claim 1, wherein after receiving the ordering notification, a first one of the nodes sends an inspection command to all other nodes, all other nodes report corresponding sequence number labels to the first one of the nodes after receiving the inspection command sent by the first one of the nodes, and the first one of the nodes confirms that ordering calibration of all the nodes is completed after receiving the sequence number labels of all the other nodes.
3. The method according to claim 2, wherein when reporting the corresponding sequence number label to the first node, reporting the sending time of all other nodes is delayed according to the stored sequence number label.
4. The method of claim 2, wherein if a first one of the nodes fails to receive all other sequence numbers of the nodes and the current retry sequence number is less than N, then returning a retry node sequence and adding one to the current retry sequence number; wherein the preset initial value of the retry sequence number is 0, and N is a natural number.
5. The node ordering method according to claim 2, characterized in that the ordering notification and/or the inspection command is a CAN message.
6. The node ordering method of claim 1, wherein the message further comprises: the command feature and the check code are used for checking the sequence number tag and the command feature.
7. A node ordering system, comprising: a plurality of nodes connected in sequence;
the node ordering system is configured to:
the nodes sequentially send messages with sequence number labels, wherein each node except the first node and the last node stores the sequence number label in the received message after receiving the message from the previous node, and further takes the sum of the sequence number label and a preset value as a new sequence number label to send the message with the new sequence number label to the next node; after receiving a message from a previous node, the last node stores a sequence number label in the received message, and further sends a sequencing notice to the first node; and after receiving the ordering notification, the first node confirms that ordering calibration of all the nodes is completed.
8. The node ordering system of claim 7, wherein all the nodes are sequentially connected by LIN lines or hard wires with proprietary communication protocols.
9. The node ordering system of claim 7, wherein a first of the nodes includes a master port, a last of the nodes includes a slave port, and the nodes except for the first and last of the nodes each include a master port and a slave port; the master ports of the other nodes except the last node are connected with the slave ports of the next node, so as to sequentially transmit the messages.
10. A vehicle-mounted keyless system, characterized by comprising a plurality of BLE-PEPS nodes connected in sequence, all of the BLE-PEPS nodes implementing sequencing calibration using the node sequencing method according to any one of claims 1-6.
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