CN115884128B - Train cross-core network communication method, device, equipment and storage medium - Google Patents
Train cross-core network communication method, device, equipment and storage medium Download PDFInfo
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Abstract
The invention discloses a method, a device, equipment and a storage medium for communication of trains across core networks. The method comprises the following steps: according to the equipment identifiers of the head-of-train communication equipment and the tail-of-train communication equipment, respectively determining a first head-of-train communication IP and a first tail-of-train communication IP distributed by the head-of-train communication equipment and the tail-of-train communication equipment in a first domain name server; the first domain name server is a domain name server of a first core network; determining whether the head-of-line communication device enters a second core network; if the train head communication equipment enters the second core network, establishing communication connection between the train tail communication equipment in the first core network and the train head communication equipment in the second core network through the second train head communication IP of the second core network and the first train tail communication IP. The embodiment of the invention can realize the non-perception switching of the service in the switching of the cross-core network and ensure the smooth operation of the service.
Description
Technical Field
The present invention relates to the field of train communications technologies, and in particular, to a method, an apparatus, a device, and a storage medium for cross-core network communications of a train.
Background
The safety protection system at the tail of the train is designed for ensuring the running safety of the train, replaces the early manual train guard, and has important functions of ensuring the running safety of the railway and improving the transportation operation efficiency. The system mainly comprises a train tail machine platform, a train tail host and other auxiliary equipment, wherein the train tail machine platform is arranged at the head of the locomotive, and the train tail host is arranged at the tail of the train and is connected with a train air pipe. The train driver realizes the monitoring of the wind pressure at the tail of the train and the control of the train tail host to carry out auxiliary exhaust braking and other services by operating the train tail machine platform.
Under normal conditions, the head-of-train communication equipment and the tail-of-train communication equipment can normally communicate under the core network of the same local group company. However, if the situation of crossing the road exists in the running process of the train, the head communication equipment is connected with a new core network in a crossing way, the tail communication equipment is connected with the new core network in a crossing way, at the moment, the head communication equipment and the tail communication equipment are respectively attached to the core networks of different group companies, and communication barriers can be caused by inconsistent steps of switching the head communication equipment and the tail communication equipment to the new core network. Because most of trains of train tail service are trucks with longer train bodies, long-time communication barriers are often caused, and the safe operation of the safety protection system at the tail of the train is seriously influenced.
Disclosure of Invention
The invention provides a method, a device, equipment and a storage medium for communication across a core network of a train, which are used for realizing non-perception switching of services during switching across the core network and ensuring smooth operation of the services.
According to an aspect of the present invention, there is provided a communication method of a train across a core network, including:
according to the equipment identifiers of the head-of-train communication equipment and the tail-of-train communication equipment, respectively determining a first head-of-train communication IP and a first tail-of-train communication IP distributed by the head-of-train communication equipment and the tail-of-train communication equipment in a first domain name server; the first domain name server is a domain name server of a first core network;
determining whether the head-of-line communication device enters a second core network;
if the train head communication equipment enters the second core network, establishing communication connection between the train tail communication equipment in the first core network and the train head communication equipment in the second core network through the second train head communication IP of the second core network and the first train tail communication IP.
According to another aspect of the present invention, there is provided a train cross-core network communication apparatus comprising:
the communication establishing module is used for respectively determining a first head-of-train communication IP and a first tail-of-train communication IP distributed by the head-of-train communication equipment and the tail-of-train communication equipment in a first domain name server according to equipment identifiers of the head-of-train communication equipment and the tail-of-train communication equipment; the first domain name server is a domain name server of a first core network;
the cross-office monitoring module is used for determining whether the head-of-line communication equipment enters a second core network;
and the communication reconnection module is used for establishing communication connection between the train tail communication equipment in the first core network and the train head communication equipment in the second core network through the train communication equipment in the second train head communication IP and the first train tail communication IP of the second core network if the train head communication equipment is determined to enter the second core network.
According to another aspect of the present invention, there is provided an electronic apparatus including:
at least one processor;
a memory communicatively coupled to the at least one processor;
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of train cross-core network communication of any of the embodiments of the present invention.
According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to implement the method of train cross-core network communication according to any of the embodiments of the present invention when executed.
According to the embodiment of the invention, the communication IP is distributed for the head-of-column and the tail-of-column communication equipment when the head-of-column communication equipment does not cross the office, and when the head-of-column communication equipment has switched the core network and the tail-of-column communication equipment has not switched the core network, the communication connection between the head-of-column communication equipment and the second head-of-column communication IP which is newly distributed and the first tail-of-column communication IP which is still effective is established based on the head-of-column communication equipment, so that the problem of communication failure caused by inconsistent steps of switching the head-of-column communication equipment and the tail-of-column communication equipment to the new core network is solved, the non-perception switching of the business when the head-of-column and the tail-of-column communication equipment cross the core network is realized, and the smooth proceeding of the business is ensured.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for communication between trains across a core network according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for communication of trains across a core network according to a further embodiment of the present invention;
fig. 3 is a schematic structural diagram of a communication device of a train crossing a core network according to still another embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device implementing an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The related art of the present invention will be described herein in order to further determine the scope of the present invention.
The 450MHz analog train tail system applies a radio intercom technology, and the train tail machine platform and the train tail host carry out analog data transmission through point-to-point communication in the 450MHz frequency band, so as to complete the train tail operation business flow.
Two communication modes of the GSM-R and 400MHz digital dual-mode type column tail system work simultaneously to form wireless channel redundant communication. When the IP address is not acquired, the train tail equipment works in a 400MHz digital mode, and train tail information transmission is carried out in a digital intercom mode; after the IP address is acquired, the equipment automatically enters a dual-mode, the train tail information is simultaneously transmitted in a GSM-R mode and a 400MHz digital mode, and the receivers respectively respond in a corresponding mode of receiving the information.
The 5G-R and 400MHz digital dual-mode train tail system has two communication modes of 5G-R and 400 MHz. In a 5G-R communication mode, the train tail communication is carried by a 5G-R network; under the 400MHz digital communication mode, the column tail communication adopts a digital intercom direct communication mode.
And redundant communication is formed by two communication modes, so that the stability and reliability of column tail communication are ensured. The system has two working modes, namely a 400MHz digital mode and a dual-mode, wherein when an IP address is not acquired, the train tail equipment works in the 400MHz digital mode; after the IP address is acquired, the wireless communication system automatically enters a dual-mode, and simultaneously carries out wireless communication in a 5G-R mode and a 400MHz digital mode. The embodiment of the invention is mainly related to the tail-list communication service in a 5G-R mode.
Fig. 1 is a flowchart of a communication method across a core network of a train according to an embodiment of the present invention, where the present embodiment is applicable to a case where a head-of-train communication device and a tail-of-train communication device cannot communicate due to being located in different core networks, the method may be performed by a communication device across a core network of a train, the device may be implemented in a form of hardware and/or software, and the device may be configured in an electronic device having corresponding data processing capability. As shown in fig. 1, the method includes:
s110, respectively determining a first head-of-train communication IP and a first tail-of-train communication IP distributed by the head-of-train communication equipment and the tail-of-train communication equipment in a first domain name server according to equipment identifiers of the head-of-train communication equipment and the tail-of-train communication equipment; the first domain name server is a domain name server of a first core network.
The train head communication equipment can be composed of a train tail machine platform, a train tail control box and a matched antenna feed system, which are positioned at the head part of the locomotive, and the train tail communication equipment can be composed of a train tail host and a matched antenna feed system, which are positioned at the tail part of the locomotive.
Specifically, when the head-of-train communication device and the tail-of-train communication device are both connected to the same core network, the "locomotive number" of the tail-of-train locomotive platform is used as the device identifier of the head-of-train communication device, the "tail-of-train host ID" of the tail-of-train host is used as the device identifier of the tail-of-train communication device, the head-of-train/tail-of-train first communication IP is respectively allocated to the head-of-train/tail-of-train first communication device and the tail-of-train first communication IP according to the device identifier of the head-of-train/tail-of-train communication device, and the head-of-train/tail-of-train communication device can query the communication IP of the opposite party at the first domain name server according to the device identifier of the head-of-train/tail-of-train communication device, so as to establish communication connection with the opposite party. After the communication connection is established, the functions of manually inquiring the wind pressure at the tail of the train, dynamically displaying the wind pressure, assisting in exhausting and braking, alarming that the wind pressure of the main air pipe is lower than a set value, alarming that the battery of the main air pipe is insufficient, timing the system and the like can be realized.
S120, determining whether the head-of-line communication equipment enters a second core network.
The second core network is a core network for the head-of-row equipment to establish a new communication connection due to movement.
In particular, the lines on the train track often belong to different group companies, which all have their own core network. In the process of running the train on the line, the situation that the core network connected with the train at the moment is different from the core network in front of the running line is difficult to avoid passing through different core networks. When the head-of-column device enters a new core network, the tail-of-column device is still located in the original core network, and at this time, the head-of-column device and the tail-of-column device are located in different core networks, so that effective communication may not be possible. The invention monitors the core network connected with the head-of-train communication equipment, and when determining that the head-of-train equipment enters a new core network due to movement of a train, determines the new core network as a second core network.
And S130, if the train head communication equipment enters the second core network, establishing communication connection between the train tail communication equipment positioned in the first core network and the train head communication equipment positioned in the second core network through the second train head communication IP and the first train tail communication IP of the second core network.
Specifically, when the head-of-line communication device enters the second core network, the second core network allocates a second head-of-line communication IP for the head-of-line communication device according to the communication requirement, acquires the newly allocated second head-of-line communication IP of the head-of-line communication device, and establishes temporary communication between the head-of-line communication device and the new core network in a transition time period when the head-of-line communication device is still valid because the head-of-line communication device is still located in the first core network and the tail-of-line communication device is not yet entering the new core network.
According to the embodiment of the invention, the communication IP is distributed for the head-of-column and the tail-of-column communication equipment when the head-of-column communication equipment does not cross the central office, and when the head-of-column communication equipment has switched the core network and the tail-of-column communication equipment does not cross the core network, the communication connection between the head-of-column communication equipment and the second head-of-column communication IP which is newly distributed and the first tail-of-column communication IP which is still effective is established based on the head-of-column communication equipment, so that the problem of communication failure caused by inconsistent steps of switching the head-of-column communication equipment and the tail-of-column communication equipment to the new core network is solved, the non-perception switching of the service when the head-of-column and the tail-of-column communication equipment cross the core network is realized, and the smooth proceeding of the service is ensured.
Fig. 2 is a flowchart of a communication method of trains crossing a core network according to another embodiment of the present invention, and the present embodiment is optimized and improved based on the foregoing embodiment. As shown in fig. 2, the method includes:
s211, in a first protocol data unit session established by a first access management network element and a first session management network element, performing communication authentication on the head-of-train communication equipment and the tail-of-train communication equipment according to equipment identifiers of the head-of-train communication equipment and the tail-of-train communication equipment; the first access management network element and the first session management network element are respectively an access management module and a session management module in the first core network;
and S212, if the communication authentication is successful, distributing a first head-of-train communication IP and a first tail-of-train communication IP for the head-of-train communication equipment and the tail-of-train communication equipment in a first domain name server.
The embodiment of the invention is suitable for a core network constructed by a 5G-R mode, wherein the 5G-R core network is formed by networking according to group companies, and the dual-mode tail-listed service relates to network elements such as AMF (access management function), SMF (session management function) and RADIUS (remote dial-in user authentication service) and DNS (domain name server) in GC equipment of the core network 5.
Specifically, after the head-to-tail communication equipment is started, 5G-R network attachment is performed through a first AMF network element, a first PDU (protocol data unit) session is established through a first SMF network element, AAA (a tail locomotive station in the head-to-tail communication equipment can use a "locomotive number" as a user name and a password) is performed through a first RADUIS network element, a tail host in the tail communication equipment can use a "tail host ID" as a user name and a password), after authentication is successful, the first RADIUS network element allocates a dynamic IP address to the head-to-tail communication equipment, determines the dynamic IP allocated to the head-to-tail communication equipment as a first head-to-tail communication IP, and determines the dynamic IP allocated to the tail communication equipment as a first tail communication IP. By performing communication authentication before the allocation of the IP address, it is ensured that the allocated IP address is truly valid, and communication between the head-to-head/tail communication devices can be effectively established.
Optionally, the allocating, in the first domain name server, a first head-of-column communication IP and a first tail-of-column communication IP for the head-of-column communication device and the tail-of-column communication device respectively includes:
respectively distributing dynamic first head-of-train communication IP and first tail-of-train communication IP for the head-of-train communication equipment and the tail-of-train communication equipment; generating a first head-of-train communication domain name and a first tail-of-train communication domain name according to the device identifiers of the head-of-train communication device and the tail-of-train communication device respectively; associating the first head-to-head communication IP with a first head-to-head communication domain name to obtain a first head-to-head association relationship, and associating the first tail-to-tail communication IP with a first tail-to-tail communication domain name to obtain a first tail-to-tail association relationship; and sending the first head-column association relationship and the first tail-column association relationship to a first domain name server for inquiring the communication IP according to the communication domain name of the communication equipment.
Specifically, the first RADIUS network element generates a domain name based on the identifier of the head-to-tail communication device, corresponds to the corresponding first head-to-tail communication IP, and sends the mapping relationship (i.e., association relationship) between the domain name and the IP address to the first domain name server, so that the opposite-end communication device can conveniently query the IP address according to the domain name. For example, the tail-in-row machine platform is communicated with the tail-in-row host, the IP address of the tail-in-row host needs to be acquired, the tail-in-row machine platform can inquire in a first domain name server of the first 5G-R core network through the domain name of the tail-in-row host ID, and the domain name server returns a first tail-in-row communication IP address corresponding to the domain name of the tail-in-row host ID, so that the tail-in-row machine platform and the tail-in-row host can communicate based on the 5G-R network according to the allocated IP address. The communication between the head-of-train and tail-of-train communication equipment is realized by storing the association relation between the domain name and the IP address to the domain name server, and the communication is safer and more stable.
S220, if a core network switching notification sent by a second access management module in the second core network is received, determining that the head communication equipment enters the second core network; the core network handover notification is generated after the head of line communication device is connected to a communication base station of a second core network.
Specifically, after entering the second core network, the first communication device establishes communication connection with a base station of the second core network, and a second SMF network element in the second core network establishes a second PDU session with the first communication device, and notifies the second RADIUS network element in the second core network that the first communication device is switched from the core network of which office. After the second RADIUS network element determines that the train communication device is switched from the first core network, the second RADIUS network element informs the first RADIUS network element of the first core network of the information that the train communication device is connected to the second core network, and at the moment, the first RADIUS network element determines that the train communication device enters the second core network. The message of switching the core network of the head-of-train communication equipment is actively notified to the first core network through the second core network, so that the first core network can quickly find the cross-office situation, and long-time communication barriers caused by untimely detection of the cross-office of the head-of-train communication equipment are avoided.
S230, writing a second head-of-line communication IP allocated by the head-of-line communication equipment in a second domain name server into the first domain name server, so that the tail-of-line communication equipment adopts the second head-of-line communication IP in the first domain name server to establish communication connection with the head-of-line communication equipment; the second domain name server is a domain name server of a second core network.
Specifically, the second RADIUS network element of the second core network allocates a new second head-of-train communication IP to the head-of-train communication device newly entering the second core network, and stores the second head-of-train communication IP in the second domain name server. The second head-of-line communication IP is acquired from the second domain name server, the second head-of-line communication IP is written into the first domain name server, and the tail-of-line communication equipment can still acquire a valid new second head-of-line communication IP by accessing the first domain name server instead of the old first head-of-line communication IP which is invalid after hysteresis, so that valid communication with the head-of-line communication equipment crossing the core network is suggested.
Optionally, the writing the second head of line communication IP allocated by the head of line communication device at the second domain name server to the first domain name server includes:
acquiring a second head-of-train communication IP distributed in a second domain name server by the head-of-train communication equipment through a main domain name server; the main domain name server is a superior domain name server of the first domain name server and the second domain name server; and writing the second head-of-line communication IP into a first domain name server.
Specifically, according to the 5G-R network design, each core network has its own dedicated secondary domain name server, and in order to facilitate management of IP and domain names, a primary domain name server is set as an upper domain name server (i.e., primary domain name server) of the secondary domain name servers in each core network, where the primary domain name server may be interconnected with the secondary domain name servers and RADIUS network elements in each office core network. When the train crossing the core network causes that the effective communication IP of the train head communication equipment cannot be obtained from the first domain name server, the first RADIUS network element inquires the main domain name server, the main domain name server can communicate with the second RADIUS network element and the second domain name server in the second core network to inquire the second train head communication IP, the inquired second train head communication IP is fed back to the first RADIUS network element and the first domain name server in the first core network, and the first RADIUS network element writes the second train head communication IP into the first domain name server. The head-of-train communication IP distributed by other core networks is acquired through the main domain name server, so that the acquisition efficiency and the safety of the new IP of the head-of-train communication equipment are improved.
S240, releasing the first head-of-line communication IP allocated by the head-of-line communication equipment at the first domain name server.
Specifically, when the first RADIUS network element knows that the first row number communication device has entered the second core network, the first row number communication IP allocated before in the first domain name server is released, that is, the first row number/the second row number communication device once entering the new core network, the original core network immediately releases the original IP allocated before, and the new core network allocates the new IP. After the communication equipment enters the new core network, the original core network releases the IP allocated before, so that the data processing pressure of the domain name server is reduced, and the phenomenon that the normal communication is influenced by two communication IPs of the same communication equipment in a domain name server is avoided.
According to the embodiment of the invention, the message of switching the core network of the head-of-line communication equipment is actively notified to the first core network through the second core network, so that the first core network can quickly find the cross-office situation, and long-time communication barriers caused by untimely detection of the cross-office of the head-of-line communication equipment are avoided; after the communication equipment enters the new core network, the original core network releases the IP allocated before, so that the data processing pressure of the domain name server is reduced, and the phenomenon that the normal communication is influenced by two communication IPs of the same communication equipment in a domain name server is avoided.
Fig. 3 is a schematic structural diagram of a communication device across a core network of a train according to still another embodiment of the present invention. As shown in fig. 3, the apparatus includes:
a communication establishing module 310, configured to determine a first head-of-column communication IP and a first tail-of-column communication IP allocated by the head-of-column communication device and the tail-of-column communication device in a first domain name server according to device identifiers of the head-of-column communication device and the tail-of-column communication device, respectively; the first domain name server is a domain name server of a first core network;
a cross office monitoring module 320, configured to determine whether the head of line communication device enters a second core network;
and the communication reconnection module 330 is configured to establish, if it is determined that the head-of-train communication device enters the second core network, a communication connection between the tail-of-train communication device located in the first core network and the head-of-train communication device located in the second core network through the second head-of-train communication IP of the train communication device in the second core network and the first tail-of-train communication IP.
The train cross-core network communication device provided by the embodiment of the invention can execute the train cross-core network communication method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Optionally, the communication reconnection module 330 includes a second IP writing unit for:
writing a second head-of-line communication IP allocated by the head-of-line communication equipment in a second domain name server into a first domain name server, so that the tail-of-line communication equipment adopts the second head-of-line communication IP in the first domain name server to establish communication connection with the head-of-line communication equipment; the second domain name server is a domain name server of a second core network.
Optionally, the second IP writing unit is specifically configured to:
acquiring a second head-of-train communication IP distributed in a second domain name server by the head-of-train communication equipment through a main domain name server; the main domain name server is a superior domain name server of the first domain name server and the second domain name server; and writing the second head-of-line communication IP into a first domain name server.
Optionally, the cross office monitoring module 320 is specifically configured to:
if a core network switching notification sent by a second access management module in a second core network is received, determining that the head communication equipment enters the second core network; the core network handover notification is generated after the head of line communication device is connected to a communication base station of a second core network.
Optionally, the communication establishment module 310 includes:
a communication authentication unit, configured to perform communication authentication on the head-of-train communication device and the tail-of-train communication device according to device identifiers of the head-of-train communication device and the tail-of-train communication device in a first protocol data unit session established by the first access management network element and the first session management network element; the first access management network element and the first session management network element are respectively an access management module and a session management module in the first core network;
and the IP distribution unit is used for distributing a first head-of-train communication IP and a first tail-of-train communication IP for the head-of-train communication equipment and the tail-of-train communication equipment in a first domain name server if the communication authentication is successful.
Optionally, the IP allocation unit is specifically configured to:
respectively distributing dynamic first head-of-train communication IP and first tail-of-train communication IP for the head-of-train communication equipment and the tail-of-train communication equipment; generating a first head-of-train communication domain name and a first tail-of-train communication domain name according to the device identifiers of the head-of-train communication device and the tail-of-train communication device respectively; associating the first head-to-head communication IP with a first head-to-head communication domain name to obtain a first head-to-head association relationship, and associating the first tail-to-tail communication IP with a first tail-to-tail communication domain name to obtain a first tail-to-tail association relationship; and sending the first head-column association relationship and the first tail-column association relationship to a first domain name server for inquiring the communication IP according to the communication domain name of the communication equipment.
The further explained communication device of the train crossing core network can also execute the communication method of the train crossing core network provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Fig. 4 shows a schematic diagram of an electronic device 40 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 4, the electronic device 40 includes at least one processor 41, and a memory communicatively connected to the at least one processor 41, such as a Read Only Memory (ROM) 42, a Random Access Memory (RAM) 43, etc., in which the memory stores a computer program executable by the at least one processor, and the processor 41 may perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM) 42 or the computer program loaded from the storage unit 48 into the Random Access Memory (RAM) 43. In the RAM 43, various programs and data required for the operation of the electronic device 40 may also be stored. The processor 41, the ROM 42 and the RAM 43 are connected to each other via a bus 44. An input/output (I/O) interface 45 is also connected to bus 44.
Various components in electronic device 40 are connected to I/O interface 45, including: an input unit 46 such as a keyboard, a mouse, etc.; an output unit 47 such as various types of displays, speakers, and the like; a storage unit 48 such as a magnetic disk, an optical disk, or the like; and a communication unit 49 such as a network card, modem, wireless communication transceiver, etc. The communication unit 49 allows the electronic device 40 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 41 may be various general and/or special purpose processing components with processing and computing capabilities. Some examples of processor 41 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 41 performs the various methods and processes described above, such as the train cross-core network communication method.
In some embodiments, the train cross-core network communication method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 48. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 40 via the ROM 42 and/or the communication unit 49. When the computer program is loaded into RAM 43 and executed by processor 41, one or more steps of the train cross-core network communication method described above may be performed. Alternatively, in other embodiments, the processor 41 may be configured to perform the train cross-core network communication method in any other suitable manner (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method of communication across a core network for a train, the method comprising:
according to the equipment identifiers of the head-of-train communication equipment and the tail-of-train communication equipment, respectively determining a first head-of-train communication IP and a first tail-of-train communication IP distributed by the head-of-train communication equipment and the tail-of-train communication equipment in a first domain name server; the first domain name server is a domain name server of a first core network;
determining whether the head-of-line communication device enters a second core network;
if the train head communication equipment enters the second core network, establishing communication connection between train tail communication equipment in the first core network and train head communication equipment in the second core network through a second train head communication IP of the second core network and the first train tail communication IP;
wherein the second head-of-line communication IP is assigned by a second domain name server of the second core network.
2. The method of claim 1, wherein establishing, by the train communication device, a communication connection between the tail communication device in the first core network and the head communication device in the second core network at the second head communication IP and the first tail communication IP, comprises:
writing a second head-of-line communication IP allocated by the head-of-line communication equipment in a second domain name server into a first domain name server, so that the tail-of-line communication equipment adopts the second head-of-line communication IP in the first domain name server to establish communication connection with the head-of-line communication equipment; the second domain name server is a domain name server of a second core network.
3. The method according to claim 2, wherein writing the second head of line communication IP allocated by the head of line communication device at the second domain name server to the first domain name server comprises:
acquiring a second head-of-train communication IP distributed in a second domain name server by the head-of-train communication equipment through a main domain name server; the main domain name server is a superior domain name server of the first domain name server and the second domain name server;
and writing the second head-of-line communication IP into a first domain name server.
4. The method of claim 1, wherein the determining whether the head of line communication device enters a second core network comprises:
if a core network switching notification sent by a second access management module in a second core network is received, determining that the head communication equipment enters the second core network; the core network handover notification is generated after the head of line communication device is connected to a communication base station of a second core network.
5. The method of claim 1, wherein after determining that the head of line communication device enters the second core network, further comprising:
and releasing the first head-of-list communication IP allocated by the head-of-list communication equipment at the first domain name server.
6. The method according to claim 1, wherein the determining the first head-of-column communication IP and the first tail-of-column communication IP allocated by the head-of-column communication device and the tail-of-column communication device in the first domain name server according to the device identifications of the head-of-column communication device and the tail-of-column communication device, respectively, comprises:
in a first protocol data unit session established by a first access management network element and a first session management network element, performing communication authentication on the head-of-train communication equipment and the tail-of-train communication equipment according to equipment identifiers of the head-of-train communication equipment and the tail-of-train communication equipment; the first access management network element and the first session management network element are respectively an access management module and a session management module in the first core network;
and if the communication authentication is successful, distributing a first head-of-train communication IP and a first tail-of-train communication IP for the head-of-train communication equipment and the tail-of-train communication equipment in a first domain name server.
7. The method according to claim 6, wherein assigning, in the first domain name server, the first head-of-column communication IP and the first tail-of-column communication IP to the head-of-column communication device and the tail-of-column communication device, respectively, comprises:
respectively distributing dynamic first head-of-train communication IP and first tail-of-train communication IP for the head-of-train communication equipment and the tail-of-train communication equipment;
generating a first head-of-train communication domain name and a first tail-of-train communication domain name according to the device identifiers of the head-of-train communication device and the tail-of-train communication device respectively;
associating the first head-to-head communication IP with a first head-to-head communication domain name to obtain a first head-to-head association relationship, and associating the first tail-to-tail communication IP with a first tail-to-tail communication domain name to obtain a first tail-to-tail association relationship;
and sending the first head-column association relationship and the first tail-column association relationship to a first domain name server for inquiring the communication IP according to the communication domain name of the communication equipment.
8. A train cross-core network communication device, the device comprising:
the communication establishing module is used for respectively determining a first head-of-train communication IP and a first tail-of-train communication IP distributed by the head-of-train communication equipment and the tail-of-train communication equipment in a first domain name server according to equipment identifiers of the head-of-train communication equipment and the tail-of-train communication equipment; the first domain name server is a domain name server of a first core network;
the cross-office monitoring module is used for determining whether the head-of-line communication equipment enters a second core network;
a communication reconnection module, configured to establish a communication connection between a train tail communication device located in a first core network and a train head communication device located in a second core network through a second train head communication IP of the train communication device in the second core network and the first train tail communication IP if it is determined that the train head communication device enters the second core network;
wherein the second head-of-line communication IP is assigned by a second domain name server of the second core network.
9. An electronic device, the electronic device comprising:
at least one processor;
a memory communicatively coupled to the at least one processor;
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of train cross-core network communication of any of claims 1-7.
10. A computer readable storage medium storing computer instructions for causing a processor to perform the method of train cross core network communication of any of claims 1-7 when executed.
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| CN102158829A (en) * | 2010-12-15 | 2011-08-17 | 中国神华能源股份有限公司 | Train tail information transmission system for train |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112550364A (en) * | 2020-12-10 | 2021-03-26 | 卡斯柯信号有限公司 | Train integrity detection system based on Beidou short message communication |
| CN112590861A (en) * | 2020-12-15 | 2021-04-02 | 中国国家铁路集团有限公司 | Be applied to safe train tail equipment of train integrality inspection |
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| CN102158829A (en) * | 2010-12-15 | 2011-08-17 | 中国神华能源股份有限公司 | Train tail information transmission system for train |
| WO2019096627A1 (en) * | 2017-11-20 | 2019-05-23 | Ntt Docomo, Inc. | Methods and devices for establishing a communication connection |
| CN111741132A (en) * | 2020-08-14 | 2020-10-02 | 北京全路通信信号研究设计院集团有限公司 | Column head-column tail pairing method and system suitable for IP communication |
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