CN114697326A - Multilateral communication method in edge calculation scene - Google Patents
Multilateral communication method in edge calculation scene Download PDFInfo
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- CN114697326A CN114697326A CN202210262148.7A CN202210262148A CN114697326A CN 114697326 A CN114697326 A CN 114697326A CN 202210262148 A CN202210262148 A CN 202210262148A CN 114697326 A CN114697326 A CN 114697326A
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- 238000004891 communication Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000004044 response Effects 0.000 claims abstract description 45
- 230000007246 mechanism Effects 0.000 claims description 11
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 101000652292 Homo sapiens Serotonin N-acetyltransferase Proteins 0.000 description 6
- 102100030547 Serotonin N-acetyltransferase Human genes 0.000 description 6
- 230000007175 bidirectional communication Effects 0.000 description 5
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/256—NAT traversal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
Abstract
The invention discloses a method for multilateral communication in an edge calculation scene, which relates to the technical field of communication in the edge calculation scene; the method comprises the steps of establishing tunnels with each side end through a cloud warehouse registry, obtaining ip and port information of the end nodes of each side end, informing the ip and port information of the end nodes of the corresponding side end according to side end communication requirements, allowing an ingress-egress response packet to enter a request packet according to a side end firewall, and communicating between the end nodes of the side ends in a manner of utilizing the ingress-egress request packet and the ingress-egress response packet according to the ip and port information.
Description
Technical Field
The invention discloses a method, relates to the technical field of communication in an edge computing scene, and particularly relates to a multi-edge communication method in the edge computing scene.
Background
As the technology in the field of edge computing continues to mature, more and more edge computing scenarios begin to emerge, in a general scenario, each edge node is located under a private network, and devices in the edge node access each other using a private ip, each edge node can access the cloud service by configuring one NAT device, the NAT device can carry out SNAT on all outgoing flows in the edge node, the original private ip is converted into the public network ip through the SNAT and then is sent to the cloud, therefore, the connection with the cloud is established, which is the process of cloud-edge interconnection, but in some scenes, besides the cloud-edge interconnection, all edge nodes are required to be communicated with each other, for the firewall of the NAT device, all outgoing requests are generally allowed, and all incoming requests are prohibited, so that two devices of the edge node network behind the NAT device cannot realize bidirectional communication through the NAT device.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a multilateral communication method under an edge computing scene, which can enable edge-side equipment under different private networks to achieve the effect of end-to-end bidirectional communication.
The specific scheme provided by the invention is as follows:
a multi-edge communication method in an edge computing scene is characterized in that tunnels are respectively established with each edge end through a cloud warehouse registry, ip and port information of terminal nodes endpoint of each edge end are obtained, the ip and port information of the terminal nodes endpoint of the corresponding edge end is informed according to the edge end communication requirement,
according to a mechanism that the firewall of the edge allows the entry of the outbound request packet and the inbound response packet, the terminal nodes of the edge communicate with each other by means of the outbound request packet and the inbound response packet according to the ip and the port information.
Further, in the method for multi-edge communication in an edge computing scenario, the informing of ip and port information of an endpoint of a corresponding edge according to an edge communication requirement includes:
and the terminal node endpoint of a certain edge end initiates a query request to the cloud end to acquire the ip and port information of the terminal node endpoint of the target edge end requiring communication.
Further, in the method for multi-edge communication in an edge computing scene, communication between terminal nodes endpoint of the edge end is performed by using an outbound request packet and an inbound response packet according to ip and port information, and the method includes:
and recording an outgoing request packet sent according to the ip and the port information by using a firewall of NAT equipment between the end nodes of the side end, and carrying out communication by receiving an incoming response packet of the outgoing request packet.
Further, the method for multilateral communication in an edge calculation scene includes the following specific steps:
the terminal node endpoint of a certain edge end sends an outbound request packet to the terminal nodes endpoint of other edge ends according to the ip and the port information, the NAT equipment firewall of the certain edge end records the outbound request packet sent by the terminal node endpoint of the certain edge end,
the terminal nodes endpoint of other side end sends out the incoming response packet of the outgoing request packet sent to the request packet as the terminal node endpoint of the certain side end to the terminal node endpoint of the certain side end according to the ip and the port information, and records the outgoing request packet sent by the terminal nodes endpoint of other side end through the firewall of NAT equipment of other side end,
and the terminal node endpoint of one side end sends a response data packet to the terminal nodes endpoint of other side ends according to the incoming response packet as the incoming response packet of the outgoing request packet sent by the terminal nodes endpoint of other side ends.
Further, in the method for multilateral communication in the edge computing scenario, a retransmission mechanism is enabled during communication, so that the loss of the outbound request packet or the inbound response packet is avoided.
The invention also provides a multilateral communication system under the edge computing scene, which comprises an information acquisition module and a communication module,
the information acquisition module receives ip and port information of the end node endpoint of the corresponding side end informed by the cloud according to the side end communication requirement, the ip and the port information of the end node endpoint of the side end are acquired by respectively establishing a tunnel with each side end through the cloud warehouse registry,
and the communication module enables the terminal nodes end point of the side end to communicate by using the way of the outgoing request packet and the incoming response packet according to the ip and the port information according to the mechanism that the firewall of the side end allows the incoming response packet of the outgoing request packet to enter.
Further, in the system for multilateral communication in an edge computing scene, the receiving, by the information obtaining module, ip and port information of an endpoint of a terminal node of a corresponding edge notified by the cloud according to an edge communication requirement includes:
and initiating a query request to the cloud end through the terminal node endpoint of a certain edge end, and acquiring the ip and port information of the terminal node endpoint of the target edge end requiring communication.
Further, in the system for multi-edge communication in an edge computing scene, the communication module enables the end nodes of the edge ends to communicate with each other by using an outbound request packet and an inbound response packet according to ip and port information, and includes:
and enabling the terminal nodes end of the side ends to record outgoing request packets sent according to the ip and port information by using a firewall of NAT equipment, and carrying out communication by receiving incoming response packets of the outgoing request packets.
Further, in the system for multi-edge communication in an edge computing scene, the specific steps of enabling the communication module to enable the end nodes of the edge end to communicate with each other include:
sending an outbound request packet to the end node of other side end by the end node of a certain side end according to the ip and the port information, recording the outbound request packet sent by the end node of the certain side end by the NAT equipment firewall of the certain side end,
the terminal nodes endpoint of other edge ends send out the incoming response packet of the outgoing request packet sent to the request packet as the terminal node endpoint of the certain edge end to the terminal node endpoint of the certain edge end according to the ip and the port information, and record the outgoing request packet sent by the terminal nodes endpoint of other edge ends through the NAT equipment firewalls of other edge ends,
and enabling the terminal node endpoint of the certain side end to send a response data packet to the terminal nodes endpoint of the other side end according to the incoming response packet to serve as the incoming response packet of the outgoing request packet sent by the terminal nodes endpoint of the other side end.
Further, when the communication module in the system for multilateral communication in the edge computing scenario performs communication, a retransmission mechanism is enabled, and the loss of the outbound request packet or the inbound response packet is avoided.
The invention has the advantages that:
the invention provides a multi-edge communication method in an edge calculation scene, which solves the problem that edge ends in different private networks cannot be directly communicated in the edge calculation scene, and realizes the multi-edge communication capability by means of firewall penetration and cloud registration.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a timing diagram illustrating the method of the present invention.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
The invention provides a multilateral communication method under an edge computing scene, which respectively establishes tunnels with each edge end through a cloud warehouse registry, acquires ip and port information of a terminal node endpoint of each edge end, informs the ip and the port information of the terminal node endpoint of the corresponding edge end according to the communication requirement of the edge end,
according to a mechanism that the firewall of the edge allows the entry of the outbound request packet and the inbound response packet, the terminal nodes of the edge communicate with each other by means of the outbound request packet and the inbound response packet according to the ip and the port information.
The method solves the problem that the edge ends in different private networks can not directly communicate in an edge computing scene, the cloud end registry is introduced and all the edge ends establish a tunnel with the cloud end registry, so that the cloud end registry maintains the endpoints behind the SNAT of all the edge ends, the firewall of the edge ends records the request information after the edge ends send request packets to the cloud end registry, all data packets sent to the endpoints are allowed to pass through, and the other edge ends can realize the bidirectional communication of all the edge ends only by inquiring the endpoints from the cloud end registry and sending the data packets to the endpoints.
In specific applications, in some embodiments of the method of the present invention, communication between multiple edge nodes in an edge computing scenario is further described, and by using the method, devices located in private networks of different edge nodes can pass through a NAT device to implement end-to-end direct communication, which can refer to fig. 1.
The cloud registration is responsible for acquiring the ip and the port behind the SNAT of each edge and informing each edge. Firstly, each edge communicates with the cloud registration, when the edge accesses the public network server after passing through the NAT device SNAT, the public network ip of the NAT device is observed from the server side, the cloud registration also knows the ip of the firewall SNAT of each edge, the port address, the ip and port information of the edge with communication requirements can be informed to the corresponding edge from the cloud server,
the edge terminals with communication requirements mutually acquire the ip: port information used by the opposite side, can start to mutually send UDP data packets, and carry out communication by using an outgoing request packet and an incoming response packet, such as two edge terminals of an edge terminal A (3.3.3.3) and an edge terminal B (4.4.4.4), when carrying out communication, the edge terminal A firstly sends a first outgoing request packet, 3.3.3:1234- > 4.4.4:5678, the data packet passes through the firewall of the edge terminal A to enter the public network, the outgoing request is recorded on the firewall of the edge terminal A, then the firewall of the edge terminal A opens a port, all incoming data packets accessing 3.3.3.3:1234 are allowed to pass through,
and the other side end B knows the outgoing address of the side end A is 3.3.3.3:1234, the side end B also sends out a first outgoing request packet, 4.4.4:5678- > 3.3.3:1234, the data packet passes through the firewall of the side end B and also reaches the public network, when the data packet reaches the side of the side end A, the record is already recorded on the firewall of the side end A, the firewall of the side end A considers that the data packet is the incoming response packet of the outgoing request packet sent by the side end A, therefore, the data packet is released, the data packet sent by the side end B to the side end A successfully passes through the firewall of the side end A, meanwhile, the firewall of the side end B also opens an opening to allow the corresponding incoming data packet to pass through, when the data packet sent by the side end B is received, the side end A also sends out a data packet as a response after the processing is finished, and the sent-out response data packet can also successfully pass through the firewall of the side end B, the edge terminal A and the edge terminal B successfully establish a bidirectional communication connection which can penetrate through two firewalls, and finally the two edge terminals successfully realize communication. The complete process with reference to fig. 1 is: the method comprises the steps that a tunnel is established between an edge end A and an edge end B and a cloud end registry respectively, the cloud end registry records endpoint information of the edge end A and the edge end B, the edge end A wants to communicate with the edge end B and sends a query request to the cloud end registry, the cloud end registry returns the endpoint information of the edge end B to the edge end A, the edge end A can directly send the query request to the endpoint of the edge end B after obtaining the endpoint information of the edge end B, and finally the edge end A and the edge end B successfully complete bidirectional communication.
Furthermore, when two side terminals send UDP packets to each other, for some important information, the side terminals may start a retransmission mechanism, so as to avoid the situation that some packets are lost.
Meanwhile, the invention also provides a multilateral communication system in an edge calculation scene, which comprises an information acquisition module and a communication module,
the information acquisition module receives ip and port information of the end node endpoint of the corresponding side end informed by the cloud according to the side end communication requirement, the ip and the port information of the end node endpoint of the side end are acquired by respectively establishing a tunnel with each side end through the cloud warehouse registry,
and the communication module enables the terminal nodes end point of the side end to communicate by using the way of the outgoing request packet and the incoming response packet according to the ip and the port information according to the mechanism that the firewall of the side end allows the incoming response packet of the outgoing request packet to enter.
The information interaction, execution process and other contents between the modules in the system are based on the same concept as the method embodiment of the present invention, and specific contents can be referred to the description in the method embodiment of the present invention, and are not described herein again.
Similarly, the system solves the problem that the edge terminals in different private networks cannot directly communicate in the edge computing scene, and realizes the multi-edge communication capability by means of firewall penetration and cloud registration.
It should be noted that not all steps and modules in the above flows and system structures are necessary, and some steps or modules may be omitted according to actual needs. The execution order of the steps is not fixed and can be adjusted as required. The system structure described in the above embodiments may be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by a plurality of physical entities, or some components in a plurality of independent devices may be implemented together.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A multilateral communication method in an edge computing scene is characterized in that tunnels are respectively established with each edge end through a cloud warehouse registry to obtain ip and port information of a terminal node endpoint of each edge end, the ip and port information of the terminal node endpoint of the corresponding edge end is informed according to the communication requirement of the edge end,
according to a mechanism that the firewall of the edge allows the entry of the outbound request packet and the inbound response packet, the terminal nodes of the edge communicate with each other by means of the outbound request packet and the inbound response packet according to the ip and the port information.
2. The method according to claim 1, wherein the informing of ip and port information of end node endpoint of a corresponding edge according to the edge communication requirement comprises:
and the terminal node endpoint of a certain edge end initiates a query request to the cloud end to acquire the ip and port information of the terminal node endpoint of the target edge end requiring communication.
3. The method according to claim 1 or 2, wherein the communication between the end nodes end of the edge end is performed by using an outbound request packet and an inbound response packet according to ip and port information, and the method comprises:
and an outgoing request packet sent according to the ip and port information is recorded between the terminal nodes end points of the side ends by using a firewall of the NAT equipment, and communication is carried out by receiving an incoming response packet of the outgoing request packet.
4. The method of claim 3, wherein the method comprises the following steps:
the terminal node endpoint of a certain edge end sends an outbound request packet to the terminal nodes endpoint of other edge ends according to the ip and the port information, the NAT equipment firewall of the certain edge end records the outbound request packet sent by the terminal node endpoint of the certain edge end,
the terminal nodes endpoint of other side end sends out the incoming response packet of the outgoing request packet sent to the request packet as the terminal node endpoint of the certain side end to the terminal node endpoint of the certain side end according to the ip and the port information, and records the outgoing request packet sent by the terminal nodes endpoint of other side end through the firewall of NAT equipment of other side end,
and the terminal node endpoint of one side end sends a response data packet to the terminal nodes endpoint of other side ends according to the incoming response packet as the incoming response packet of the outgoing request packet sent by the terminal nodes endpoint of other side ends.
5. The method of claim 1, wherein a retransmission mechanism is enabled to avoid missing outgoing request packets or incoming response packets during the communication.
6. A multilateral communication system under an edge computing scene is characterized by comprising an information acquisition module and a communication module,
the information acquisition module receives ip and port information of the end node endpoint of the corresponding side end informed by the cloud according to the side end communication requirement, the ip and the port information of the end node endpoint of the side end are acquired by respectively establishing a tunnel with each side end through the cloud warehouse registry,
the communication module enables the terminal nodes endpoint of the side end to communicate by using the way of the outgoing request packet and the incoming response packet according to the ip and the port information according to the mechanism that the firewall allows the incoming response packet of the outgoing request packet to enter.
7. The system according to claim 6, wherein the information obtaining module receives ip and port information of an endpoint of a corresponding edge notified by a cloud according to edge communication requirements, and includes:
and initiating a query request to the cloud end through the terminal node endpoint of a certain edge end, and acquiring the ip and port information of the terminal node endpoint of the target edge end requiring communication.
8. The system according to claim 6 or 7, wherein the communication module enables end nodes at edge ends to communicate with each other by using an outbound request packet and an inbound response packet according to ip and port information, and comprises:
and enabling the terminal nodes end of the side ends to record outgoing request packets sent according to the ip and port information by using a firewall of NAT equipment, and carrying out communication by receiving incoming response packets of the outgoing request packets.
9. The system according to claim 8, wherein the communication module enables end nodes at the edge end to communicate with each other, and the communication module further comprises:
sending an outbound request packet to the end node of other side end by the end node of a certain side end according to the ip and the port information, recording the outbound request packet sent by the end node of the certain side end by the NAT equipment firewall of the certain side end,
sending an outbound request packet to the end node endpoint of the certain edge end according to the ip and the port information, recording the outbound request packet sent by the end node endpoint of the other edge end through the firewall of the NAT equipment of the other edge end,
and enabling the terminal node endpoint of the certain side end to send a response data packet to the terminal nodes endpoint of the other side end according to the incoming response packet to serve as the incoming response packet of the outgoing request packet sent by the terminal nodes endpoint of the other side end.
10. The system according to claim 6, wherein the communication module enables a retransmission mechanism to avoid losing outgoing request packets or incoming response packets during communication.
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| CN202210262148.7A CN114697326B (en) | 2022-03-17 | Method for polygonal communication in edge computing scene |
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