CN116708311A - Rail transit train message transmission method and device - Google Patents
Rail transit train message transmission method and device 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
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0823—Errors, e.g. transmission errors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
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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
Abstract
The application discloses a method and equipment for transmitting a rail transit train message, which solve the problem of low reliability and safety of train-to-train multilink communication. The method for transmitting the rail transit train message comprises the following steps: the method is used for a transmitting end and comprises the following steps: the edge computing node unit receives a message sent by a vehicle-mounted application network; determining a transmission type according to the message; and responding to the messages between vehicles, and generating a forwarding strategy according to the transmission type value set by the messages. The method is used for a receiving end and comprises the following steps: the edge computing node unit receives and judges a first message source; acquiring message sending strategy information; if the transmission is real-time transmission, the transmission is timely forwarded to a vehicle-mounted application network; if the transmission is safe, waiting for a second message in the waiting time; receiving a second message, and comparing the first message with the second message; and (5) discarding all the messages due to inconsistent comparison. And discarding the first message without receiving other channel messages. The application enhances the reliability and safety of message transmission and improves the safety and integrity level of the vehicle-to-vehicle communication function.
Description
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a method and an apparatus for transmitting a rail transit train message.
Background
Along with the next generation of urban rail intelligent development demand, train operation control is moving from system automatic control to train autonomous operation control, the main communication demand of the traditional train operation control system based on communication is between the vehicles and the ground, the train autonomous operation control system is in addition to the vehicle-to-ground communication demand, the application of the vehicle-to-ground wireless communication system WLAN, LTE-M and the like is mature at present, the demand of vehicle-to-ground communication is met, the communication message between the vehicles of the autonomous operation system at the present stage is forwarded from the vehicle to the ground firstly, then from the ground to the vehicle, the message forwarding path is long, the time delay is relatively large, aiming at the problem, the currently disclosed patent CN 114071413A provides a networking mode of MESH communication between the vehicles and the side of the rail, the CN 114670904A provides a solution of mutual backup switching between a plurality of communication links between the vehicles, the two proposed solutions can solve the communication demands between the vehicles in a certain degree of theory, but the vehicle-to-vehicle direct communication network is not applied in the actual track traffic, and the reliability based on single channel transmission can not meet the demand of the communication industry, and the reliability of the switching between the links is a plurality of time delay and the problem is a problem of communication.
In summary, there may be a plurality of data forwarding channels between vehicles in the present stage, as shown in fig. 1, including a mature and reliable vehicle-ground vehicle channel, and various direct communication channels between vehicles possibly applied in the future. How to fully utilize the ground transmission channel of the traditional ground wireless system and combine the new channel built by the new technology of the vehicle-to-vehicle communication, so that a practical and feasible method is needed for improving the safety integrity level of the next-generation train control system communication system while the related new technology can be applied to the early maturity of the rail transit.
Disclosure of Invention
The embodiment of the application provides a method and equipment for transmitting a rail transit train message, which solve the problem of low reliability and safety of train-to-train multilink communication.
In a first aspect, an embodiment of the present application provides a method for transmitting a rail transit train message, which is used for a transmitting end, and includes the steps of:
the edge computing node unit receives a message sent by a vehicle-mounted application network;
determining a transmission type according to the message;
and responding to the messages between vehicles, and generating a forwarding strategy according to the transmission type value set by the messages.
Further, the method further comprises the steps of:
determining a channel list according to the target IP of the message;
in response to the result of the undetermined IP tunnel, the tunnel list increases the tunnel record for the target IP.
Further, the method further comprises the steps of:
and carrying out channel detection on the IP channel.
The channel detection comprises at least one of the following modes:
determining an initial service priority P0 and a serviceable delay threshold D0 of a channel; in response to the service priority being greater than P0, recognizing that the service is not available; in response to the channel delay being greater than D0, it is determined that the message cannot be sent.
Performing channel detection and setting system aging time Td; and deleting the channel from the list in response to not receiving the channel transmission message within the Td time.
Calculating the service priority of the single index; and comprehensively calculating the service quality priority of the channel according to the service priority of each single index.
Further, in response to the service priority of more than one channel being less than P0 and the channel delay being greater than D0, the forwarding strategy changes from dual channel reliable delivery to dual channel real-time delivery. In response to the service priority of only one channel being less than P0, the forwarding strategy changes from dual channel reliable delivery to single channel real-time delivery; in response to only one channel having a service priority less than P0, the forwarding strategy changes from dual channel real-time delivery to single channel real-time delivery. And responding to the service priority of all channels being greater than P0, and transmitting the forwarding strategy for single-channel real-time transmission.
Further, in response to the IP being in the channel list, the method further comprises the steps of:
responding to the sending strategy of the message to be single-channel real-time transmission, and taking a channel with the minimum service priority and less than or equal to P0 as a forwarding channel;
responding to the sending strategy of the message to be double-channel real-time transmission, and simultaneously sending two channels with minimum service priority which is less than or equal to P0;
and responding to the sending strategy of the message to reliably transmit the message in a double-channel mode, taking the minimum service priority, and simultaneously sending the message in the two channels with the channel delay less than D0.
Further, adding an attribute to the header attribute of the forwarded packet IP packet includes: this forwarding policy, sending timestamp, message sequence number, and safe transmission waiting time.
In a second aspect, an embodiment of the present application further provides a method for transmitting a rail transit train packet, where the method is used by a receiving end, and includes the steps of:
the edge computing node unit receives a first message;
judging the source of the first message;
responding to messages between vehicles, and acquiring sending strategy information of the messages;
responding to the real-time transmission of the sending strategy, and forwarding the real-time transmission to the vehicle-mounted application network in time;
responding to the sending strategy as safe transmission, and waiting for a second message in the set safe transmission waiting time; the second message is a message sent by other channels;
responding to the second message received in the safe transmission waiting time, and comparing the first message with the second message;
discarding the first message and the second message in response to inconsistent message comparison;
and discarding the first message in response to the fact that no other channel messages are received within the safe transmission waiting time.
Further, the method comprises the steps of:
and responding to the consistency of the message comparison, and sending a first message and a second message.
In a third aspect, an embodiment of the present application further provides a sending end edge computing unit, configured to implement the method according to any one of the embodiments of the first aspect of the present application, where at least one module of the sending end edge computing unit is configured to at least one function of:
and receiving a message sent by the vehicle-mounted application network. And determining the transmission type according to the message. And responding to the messages between vehicles, and generating a forwarding strategy according to the transmission type value set by the messages.
In a fourth aspect, an embodiment of the present application further provides a receiving-end edge computing unit, configured to implement the method according to any one of the embodiments of the second aspect of the present application, where at least one module of the receiving-end edge computing unit is configured to implement at least one of the following functions:
and receiving a first message. Judging the source of the first message. And responding to the messages between the vehicles, and acquiring the sending strategy information of the messages. And responding to the real-time transmission of the sending strategy, and forwarding the real-time transmission to the vehicle-mounted application network in time. Responding to the sending strategy as safe transmission, and waiting for a second message in the set safe transmission waiting time; the second message is a message sent by other channels. And responding to the second message received in the safe transmission waiting time, and comparing the first message with the second message. And discarding the first message and the second message in response to inconsistent message comparison. And discarding the first message in response to the fact that no other channel messages are received within the safe transmission waiting time.
In a fifth aspect, an embodiment of the present application further provides a rail transit train message transmission system, configured to implement the rail transit train message transmission method according to any one of the foregoing embodiments, where the rail transit train message transmission system includes a vehicle application network, a sending end edge computing node unit, and a receiving end edge computing node unit. The vehicle-mounted application network is communicated with the vehicle-mounted wireless communication network through the transmitting end edge computing node unit, and is communicated with another vehicle-mounted application network through the receiving end edge computing node unit.
Further, the vehicle-mounted application network and the edge computing node unit are connected through a vehicle-mounted access unit. The edge computing node units and the vehicle-mounted access units are interconnected through an IP network.
In a sixth aspect, embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method as in any of the embodiments described above.
In a seventh aspect, an embodiment of the present application further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and capable of being executed by the processor, where the processor executes the computer program to implement the method according to any one of the embodiments above.
The above at least one technical scheme adopted by the embodiment of the application can achieve the following beneficial effects:
the application provides a differential transmission method for message multi-channel transmission between vehicles, which enhances the reliability and safety of message transmission and improves the safety integrity level of the vehicle-to-vehicle communication function.
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 specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of a prior art vehicle-to-vehicle communication multi-channel;
fig. 2 is a flowchart of a transmitting end of a message transmitting method of a rail transit train according to an embodiment of the present application;
FIG. 3 is a flowchart of a transmitting end of another method for transmitting a message of a rail transit train according to an embodiment of the present application;
fig. 4 is a flowchart of a third method for transmitting a message of a rail transit train according to an embodiment of the present application;
FIG. 5 is a schematic diagram of sending policy degradation according to an embodiment of the present application;
fig. 6 is a flowchart of a transmitting end of a fourth method for transmitting a rail transit train message according to an embodiment of the present application;
FIG. 7 is a flow chart of a receiving end of a message transmission method of a rail transit train according to an embodiment of the application;
FIG. 8 is a diagram illustrating a structure of a transmitting-end edge computing unit according to an embodiment of the present application;
FIG. 9 is a block diagram of a receiving-end edge computation unit according to an embodiment of the present application;
FIG. 10 is a block diagram of a message transmission system for rail transit trains according to an embodiment of the present application;
FIG. 11 is a schematic diagram of a vehicle access unit deployment in accordance with an embodiment of the present application;
FIG. 12 is a schematic diagram of another vehicle access unit deployment in accordance with an embodiment of the present application;
fig. 13 is a schematic diagram of a third vehicle access unit deployment in 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 clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
Fig. 2 is a flowchart of a method for transmitting a track traffic train message according to an embodiment of the present application.
The embodiment of the application provides a method for transmitting a rail transit train message, which is used for a transmitting end and comprises the following steps:
step 110, an edge computing node unit receives a message sent by a vehicle-mounted application network;
the edge computing node unit receives messages from the vehicle-mounted application network, and the messages need to be forwarded to other vehicle-mounted systems.
Step 120, determining the transmission type according to the message;
and analyzing the service type of the IPV4 message header or the transmission type of the IPV6 message.
And the vehicle-mounted application network carries relevant indicated values when transmitting.
And 130, responding to the messages between vehicles, and generating a forwarding strategy according to the transmission type value set by the messages.
Generating a forwarding strategy for the message between vehicles according to the service type (transmission type) value, wherein a default value system can be configured:
minimum delay position "1": two-channel real-time transmission;
highest reliable position "1": two-channel safe transmission;
the minimum cost position of 1 is transmitted in single channel in real time;
default: and (5) single-channel real-time transmission.
It should be noted that, according to the different messages, all "transmission types" in the present application may also be "service types".
When the edge computing node receives a message sent by a vehicle-mounted system network, the edge computing node analyzes the IP of the message, if the message is sent to a ground equipment network and is directly sent through a vehicle-to-ground channel, if the message is a vehicle-to-vehicle communication message of other vehicle-mounted networks, the service quality requirement of a service type is analyzed, a corresponding transmission channel sending strategy is selected according to the analyzed service quality requirement, the transmission strategy comprises single-channel real-time transmission, double-channel real-time transmission and double-channel safe transmission, corresponding indication information is added in a message header sent to indicate the sending strategy of a sending end, a sending time stamp, a message serial number and safe waiting time.
The single-channel real-time transmission selects the message to be transmitted on a channel of a communication link with the best channel service quality, the communication system has low cost, and the message is transmitted in best effort.
The two-channel real-time transmission selects the message to be sent simultaneously on the two communication links with the best channel service quality, the receiving end takes the message which arrives first and discards the message which arrives after the first, so that the packet loss rate of the communication system is reduced, and compared with the mode of transmitting the message by switching the main channel fault into the standby channel, the real-time performance and the reliability of transmission are improved.
The dual-channel secure transmission is to select the message to be simultaneously transmitted on two communication links with the best channel service quality, and the receiving end is to simultaneously receive two messages within the secure transmission time indicated by the header and detect that the message is not damaged in the transmission process, so as to improve the security integrity of the communication system.
Fig. 3 is a flowchart of another method for transmitting a rail transit train message according to an embodiment of the present application.
Further, the method further comprises the steps of:
step 140, determining a channel list according to the target IP of the message;
the edge computing node receives the message sent by the vehicle-mounted application network in real time, analyzes the target IP of the message to be forwarded, and judges whether the message is the message between vehicles, namely the message which is required to be forwarded to other vehicle-mounted networks. If the message to be forwarded between the vehicles is the message to be forwarded, searching a channel list according to the target IP.
And step 150, in response to the result that the IP channel is not determined, the channel list increases the channel record of the target IP.
If the relevant channel of the IP is not found, the channel relevant record of the destination IP is added in a channel list maintained by the system, and the channel receiving message time stamp is updated and recorded: ts and triggers detection of the channel.
Further, the method further comprises the steps of:
step 160, the received messages are uniformly forwarded according to the dual-channel real-time transmission strategy.
When the edge computing node receives a message sent to a certain destination network for the first time, the channel quality is not included in channel monitoring, and if multiple communication links exist, a two-channel real-time transmission strategy is adopted.
And a degradation and early warning mechanism of the transmission strategy is supported. When the service quality of the second channel to be transmitted does not meet the preset requirement, the dual-channel safe transmission mode is degraded to dual-channel real-time transmission, the dual-channel real-time transmission can be degraded to single-channel real-time transmission, and channel service quality alarm information is given.
Further, the method further comprises the steps of:
step 170, performing channel detection on the IP channel.
Fig. 4 is a flowchart of a third method for transmitting a message of a rail transit train according to an embodiment of the present application.
Further, the channel detection comprises the steps of:
step 171, determining an initial service priority P0 and a serviceable delay threshold D0 of the channel; in response to the service priority being greater than P0, recognizing that the service is not available; in response to the channel delay being greater than D0, it is determined that the message cannot be sent.
For example, when starting a channel detection, the channel initial service priority is set to an initial value: p0 and serviceable latency threshold: D0. p0 is a serviceable threshold value configured by the system, is larger than P0, and is determined to be incapable of providing service, D0 is an acceptable time delay under the condition that the system configures the safe transmission strategy, and if the time delay of a certain channel is larger than D0, the channel cannot be used for sending the message of the safe transmission strategy.
Further, the channel detection comprises the steps of:
step 172, performing channel detection, and setting a system aging time Td; and deleting the channel from the list in response to not receiving the channel transmission message within the Td time.
For example, the channel detection is performed, the detection period T, the detection packet loss rate L (x), the time delay D (x), and the like, and the current time T-Ts > Td, where Td is the aging time set by the system, that is, the Td time does not receive any message to be sent from the channel, and the relevant channel is deleted from the management list.
Further, the channel detection comprises the steps of:
step 173, calculating the service priority of the single index;
and 174, comprehensively calculating the service quality priority of the channel according to the service priority of each single index.
For example, the system cycle timing calculates the serviceable priority and the time delay index of the channel, wherein the serviceable priority is comprehensively calculated by adopting the packet loss rate L (x), the time delay D (x) and other evaluable indexes O (x), and the formula is as follows
Further, the method further comprises the steps of:
step 175, the edge computing node unit gives an early warning prompt for the channel.
For example, if P (x) > P0, D (x) > D0, the edge compute node unit gives an early warning prompt for the channel.
Fig. 5 is a schematic diagram of sending policy degradation according to an embodiment of the present application.
Further, in response to the service priority of more than one channel being less than P0 and the channel delay being greater than D0, the forwarding strategy changes from dual channel reliable delivery to dual channel real-time delivery.
For example, when two channels are required to be reliably transmitted, if the two channels P (x) < P0 are greater than or equal to the two channels P (x) < P0 and meet the serviceable requirement, but the D (x) index of the channel is greater than D0 and does not meet the safety requirement, the forwarding strategy is degraded to two-channel real-time transmission; for application scenarios with high security integrity level requirements, the system can be controlled to not degrade, discard processing.
In response to only one channel having a service priority less than P0, the forwarding strategy changes from dual channel reliable delivery to single channel real-time delivery.
For example, when dual channel reliable delivery is required, if only one channel P (x) < P0 meets the serviceable requirement, the forwarding strategy is degraded to single channel real-time delivery.
In response to the service priority of only one channel being less than P0, the forwarding strategy changes from dual channel real-time delivery to single channel real-time delivery;
for example, when dual channel real-time delivery is required, if only one channel P (x) < P0 meets the serviceable requirement, the forwarding strategy is downgraded to single channel real-time delivery.
And responding to the service priority of all channels being greater than P0, and transmitting the forwarding strategy for single-channel real-time transmission.
For example, when single channel real-time delivery is required, if no channel P (x) meets the requirements, the forwarding policy is degraded to single channel real-time delivery.
Fig. 6 is a flowchart of a fourth method for transmitting a message of a rail transit train according to an embodiment of the present application.
Further, in response to the IP being in the channel list, the method further comprises the steps of:
step 180, responding to the sending strategy of the message to be single-channel real-time transmission, and taking a channel with the minimum service priority and less than or equal to P0 as a forwarding channel;
step 190, responding to the sending strategy of the message to be double-channel real-time transmission, and sending two channels with minimum service priority and less than or equal to P0 at the same time;
step 1100, responding to the sending strategy of the message to reliably transmit the message in two channels, taking the minimum service priority, and simultaneously sending the message in two channels with the channel delay less than D0.
For example, after receiving a message from the vehicle-mounted application network, the edge computing node unit selects a corresponding channel and a corresponding policy for forwarding the message according to the corresponding generated policy. The edge computing node unit receives the message from the vehicle-mounted application network and judges that the message is the message directly forwarded to other vehicles. And judging that the forwarded destination IP is in the managed channel list, and updating the latest time Ts of the received message.
If a message requiring a single-channel real-time transmission strategy is required to be sent, taking a channel with the minimum P (x) and P (x) <=P0 as a forwarding channel, otherwise, discarding the message;
if the message of the dual-channel real-time transmission strategy is required to be transmitted, the message with the minimum P (x) is taken, and two channels P (x) <=P0 are transmitted simultaneously, and the number of channels meeting the requirement is less than 2, the message is forwarded according to the degradation strategy;
if the message with the two-channel reliable transmission strategy is required to be transmitted, the message with the minimum P (x) is taken, and two channels with the minimum D (x) and the minimum D0 are simultaneously transmitted, and if the number of the channels is less than 2, the message is forwarded according to the degradation strategy;
further, adding an attribute to the header attribute of the forwarded packet IP packet includes: this forwarding policy, sending timestamp, message sequence number, and safe transmission waiting time. Adding attributes to the header attributes of the IP packet of the message to be forwarded comprises the following steps: this forwarding policy, sending timestamp, message sequence number, and safe transmission waiting time. And completing the message transmission on the selected channel.
Fig. 7 is a flowchart of a receiving end of a method for transmitting a message of a rail transit train according to an embodiment of the present application.
The embodiment of the application also provides a method for transmitting the rail transit train message, which is used for the receiving end and comprises the following steps:
step 210, the edge computing node unit receives a first message;
edge computing node units receive messages from connected communication network channels
Step 220, judging the source of the first message;
judging that the received message comes from other vehicle application networks;
step 230, responding to the messages between vehicles and acquiring the sending strategy information of the messages;
and analyzing and receiving messages from the application network packet heads of other vehicles, and acquiring the sending strategy type, the sending time stamp, the message sequence number and the safe transmission waiting time of the sending end filler.
Step 240, responding to the real-time transmission of the sending strategy, and forwarding the real-time transmission to the vehicle-mounted application network in time;
the sending strategy is single-channel or double-channel real-time transmission, and is timely forwarded to the vehicle-mounted application network.
Step 250, in response to the sending policy being safe transmission, waiting for a second message within the set safe transmission waiting time; the second message is a message sent by other channels;
and if the sending strategy is double-channel safe transmission, waiting for a second message sent by other channel messages in the safe transmission waiting time.
Step 260, in response to receiving the second message within the safe transmission waiting time, comparing the first message with the second message;
step 270, discarding the first message and the second message in response to inconsistent message comparison;
and taking the safe transmission waiting time as the waiting time, receiving other channels to send messages in the waiting time, analyzing the content of the message header and the data packet, sending after the sending time stamp, the message serial number and the content are consistent, otherwise discarding the messages.
Step 280, discarding the first message in response to not receiving other channel messages within the safe transmission waiting time.
And if no other channel messages are received within the waiting time, discarding the messages.
Further, the method comprises the steps of:
step 290, the first message and the second message are sent in response to the consistency of the message comparison.
The embodiment of the application also provides a sending end edge computing unit, which is used for realizing the method according to any one of the embodiments of the application, and is used for:
and receiving a message sent by the vehicle-mounted application network. And determining the transmission type according to the message. And responding to the messages between vehicles, and generating a forwarding strategy according to the transmission type value set by the messages.
Fig. 8 is a diagram illustrating a structure of a transmitting-end edge computing unit according to an embodiment of the present application.
In order to implement the above technical solution, the transmitting end edge calculating unit 400 provided by the present application includes a transmitting end transmitting module 401, a transmitting end determining module 402, and a transmitting end receiving module 403 that are connected to each other.
The transmitting end receiving module is used for receiving the message transmitted by the vehicle-mounted application network.
The transmitting end determining module is used for determining the transmission type according to the message. And responding to the messages between vehicles, and generating a forwarding strategy according to the transmission type value set by the messages.
The sending end sending module is used for sending the forwarding strategy.
Specific methods for implementing the functions of the sending end sending module, the sending end determining module and the sending end receiving module are described in the method embodiments of the present application, and are not described herein again.
Fig. 9 is a block diagram of a receiving-end edge computing unit according to an embodiment of the present application.
The embodiment of the application also provides a receiving end edge computing unit, which is used for implementing the method according to any one of the embodiments of the application, and is used for:
and receiving a first message. Judging the source of the first message. And responding to the messages between the vehicles, and acquiring the sending strategy information of the messages. And responding to the real-time transmission of the sending strategy, and forwarding the real-time transmission to the vehicle-mounted application network in time. Responding to the sending strategy as safe transmission, and waiting for a second message in the set safe transmission waiting time; the second message is a message sent by other channels. And responding to the second message received in the safe transmission waiting time, and comparing the first message with the second message. And discarding the first message and the second message in response to inconsistent message comparison. And discarding the first message in response to the fact that no other channel messages are received within the safe transmission waiting time.
In order to implement the above technical solution, the receiving end edge calculating unit 500 provided by the present application includes a receiving end transmitting module 501, a receiving end determining module 502, and a receiving end receiving module 503 that are connected to each other.
The receiving terminal receiving module is used for receiving the first message.
The receiving end determining module is used for judging the source of the first message. And responding to the messages between the vehicles, and acquiring the sending strategy information of the messages. And determining a forwarding mode and a message processing mode according to the sending strategy information.
The receiving end sending module is used for sending the sending strategy and the message.
Specific methods for implementing the functions of the receiving end sending module, the receiving end determining module and the receiving end receiving module are described in the embodiments of the methods of the present application, and are not described herein again.
Fig. 10 is a block diagram of a message transmission system of a rail transit train according to an embodiment of the present application.
The embodiment of the application also provides a rail transit train message transmission system, which is used for the rail transit train message transmission method according to any one of the embodiments, and comprises a vehicle-mounted application network 601, a transmitting end edge computing node unit 602 and a receiving end edge computing node unit 603.
The vehicle-mounted application network is communicated with the vehicle-mounted wireless communication network through the transmitting end edge computing node unit, and is communicated with another vehicle-mounted application network through the receiving end edge computing node unit.
Further, the vehicle-mounted application network and the edge computing node unit are connected through a vehicle-mounted access unit. The edge computing node units and the vehicle-mounted access units are interconnected through an IP network.
The edge computing node unit is responsible for message forwarding and receiving strategies of the vehicle-to-vehicle communication messages in multiple channels of the vehicle-to-vehicle, and high-efficiency and reliable transmission of the vehicle-to-vehicle messages is guaranteed. The edge computing node unit is positioned between the vehicle-mounted application network and the vehicle-mounted wireless communication network, and the edge computing node unit is connected with the vehicle-mounted application network through an Ethernet.
Fig. 11 to 13 are schematic views of deployment of three vehicle-mounted access units according to an embodiment of the present application.
The edge computing node unit can be deployed together with a certain vehicle-mounted access unit of the wireless network, as shown by 702 in fig. 12, or can be deployed independently, as shown by 701 in fig. 11, and the edge computing node unit and the vehicle-mounted access unit are interconnected through an IP network; when the vehicle access unit adopts the fusion mode, the edge computing node unit can also be deployed together with the vehicle access unit in the fusion mode, as shown by 703 in fig. 13.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The application therefore also proposes a computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, implements a method according to any of the embodiments of the application.
Furthermore, the application also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of being run by the processor, wherein the processor executes the computer program to realize the method according to any embodiment of the application.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory. The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.
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 one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (15)
1. The rail transit train message transmission method is used for a transmitting end and is characterized by comprising the following steps of:
the edge computing node unit receives a message sent by a vehicle-mounted application network;
determining a transmission type according to the message;
and responding to the messages between vehicles, and generating a forwarding strategy according to the transmission type value set by the messages.
2. The rail transit train messaging method of claim 1, further comprising the step of:
determining a channel list according to the target IP of the message;
in response to the result of the undetermined IP tunnel, the tunnel list increases the tunnel record for the target IP.
3. The rail transit train messaging method of claim 2, further comprising the step of:
and carrying out channel detection on the IP channel.
4. A rail transit train messaging method according to claim 3, wherein said channel detection comprises at least one of:
determining an initial service priority P0 and a serviceable delay threshold D0 of a channel; in response to the service priority being greater than P0, recognizing that the service is not available; in response to the channel delay being greater than D0, determining that the message cannot be sent;
performing channel detection and setting system aging time Td; deleting the channel from the list in response to not receiving the channel send message within the Td time;
calculating the service priority of the single index; and comprehensively calculating the service quality priority of the channel according to the service priority of each single index.
5. The rail transit train message transmission method of claim 1, wherein the forwarding strategy is changed from dual-channel reliable transmission to dual-channel real-time transmission in response to service priority of more than one channel being less than P0 and channel delay being greater than D0;
in response to the service priority of only one channel being less than P0, the forwarding strategy changes from dual channel reliable delivery to single channel real-time delivery;
in response to the service priority of only one channel being less than P0, the forwarding strategy changes from dual channel real-time delivery to single channel real-time delivery;
and responding to the service priority of all channels being greater than P0, and transmitting the forwarding strategy for single-channel real-time transmission.
6. The rail transit train messaging method of any of claims 1-5, wherein the response IP is in a channel list, further comprising at least 1 of the steps of:
responding to the sending strategy of the message to be single-channel real-time transmission, and taking a channel with the minimum service priority and less than or equal to P0 as a forwarding channel;
responding to the sending strategy of the message to be double-channel real-time transmission, and simultaneously sending two channels with minimum service priority which is less than or equal to P0;
and responding to the sending strategy of the message to reliably transmit the message in a double-channel mode, wherein the service priority is the minimum, and the two channels with response channel delay less than D0 are sent simultaneously.
7. The method for transmitting rail transit train messages according to claim 6, wherein adding an attribute to a header attribute of a forwarded message IP packet comprises: this forwarding policy, sending timestamp, message sequence number, and safe transmission waiting time.
8. The rail transit train message transmission method is used for a receiving end and is characterized by comprising the following steps:
the edge computing node unit receives a first message;
judging the source of the first message;
responding to messages between vehicles, and acquiring sending strategy information of the messages;
responding to the real-time transmission of the sending strategy, and forwarding the real-time transmission to the vehicle-mounted application network in time;
responding to the sending strategy as safe transmission, and waiting for a second message in the set safe transmission waiting time; the second message is a message sent by other channels;
responding to the second message received in the safe transmission waiting time, and comparing the first message with the second message;
discarding the first message and the second message in response to inconsistent message comparison;
and discarding the first message in response to the fact that no other channel messages are received within the safe transmission waiting time.
9. The method for transmitting rail transit train messages according to claim 8, comprising the steps of:
and responding to the consistency of the message comparison, and sending a first message and a second message.
10. A sender edge calculation unit for implementing the method of any one of claims 1-7, characterized in that the sender edge calculation unit comprises at least one module for at least one of the following functions:
receiving a message sent by a vehicle-mounted application network;
determining a transmission type according to the message;
and responding to the messages between vehicles, and generating a forwarding strategy according to the transmission type value set by the messages.
11. A receiver edge calculation unit for implementing the method of claim 8 or 9, characterized in that the receiver edge calculation unit comprises at least one module for at least one of the following functions:
receiving a first message;
judging the source of the first message;
responding to messages between vehicles, and acquiring sending strategy information of the messages;
responding to the real-time transmission of the sending strategy, and forwarding the real-time transmission to the vehicle-mounted application network in time;
responding to the sending strategy as safe transmission, and waiting for a second message in the set safe transmission waiting time; the second message is a message sent by other channels;
responding to the second message received in the safe transmission waiting time, and comparing the first message with the second message;
discarding the first message and the second message in response to inconsistent message comparison;
and discarding the first message in response to the fact that no other channel messages are received within the safe transmission waiting time.
12. A rail transit train message transmission system, comprising at least 1 transmitting end edge computing unit according to claim 10, at least 1 receiving end edge computing unit according to claim 11, and an on-board application network;
the vehicle-mounted application network is communicated with the vehicle-mounted wireless communication network through the transmitting end edge computing node unit, and is communicated with another vehicle-mounted application network through the receiving end edge computing node unit.
13. The rail transit train messaging system of claim 12, wherein the on-board application network and the edge computing node unit are connected by an on-board access unit;
the edge computing node units and the vehicle-mounted access units are interconnected through an IP network.
14. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any one of claims 1-9.
15. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any of claims 1-9 when executing the computer program.
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| CN202310620963.0A CN116708311A (en) | 2023-05-29 | 2023-05-29 | Rail transit train message transmission method and device |
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| CN202310620963.0A CN116708311A (en) | 2023-05-29 | 2023-05-29 | Rail transit train message transmission method and device |
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