CN114584506A - Satellite network topology measuring method and device, electronic equipment and storage medium - Google Patents
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Abstract
The invention provides a satellite network topology measurement method, a device, electronic equipment and a storage medium, which comprises the steps of firstly sending node detection data and path detection data to nodes in a satellite network, and receiving first feedback data, second feedback data and satellite data of the satellite network, wherein the first feedback data, the second feedback data and the satellite data are returned by the nodes; then, performing node association analysis on the satellite network based on the first feedback data, the second feedback data and the satellite data, and performing topology link analysis based on the association analysis result; and then carrying out interface alias detection analysis on the topological links, and determining the topological structure of the satellite network. The method realizes the measurement of the topological structure of the satellite network by actively sending node detection data and path detection data to nodes in the satellite network and receiving first feedback data, second feedback data and satellite data of the satellite network, thereby perfecting a network topology discovery, identification and management scheme under a satellite network scene.
Description
Technical Field
The invention relates to the technical field of satellite network topology measurement, in particular to a satellite network topology measurement method and device, electronic equipment and a storage medium.
Background
The satellite network is used as an extension and supplement of a land network, and has the characteristics of wide coverage area, flexible network configuration, good broadcast performance and the like, so that powerful transmission guarantee is provided for various information, and the satellite network is closely concerned by people in the industry in recent years.
In order to know the topology change of the satellite network and the network condition, the topology measurement of the satellite network is required. However, because the satellite nodes in the satellite network move at a high speed along a given orbit, the link length and the on-off relationship change dynamically with time, so that the traditional topology measurement method applied to the ground wireless network is not suitable for the satellite network any more.
Therefore, it is urgently needed to provide a satellite network topology measurement method.
Disclosure of Invention
The invention provides a satellite network topology measuring method, a satellite network topology measuring device, electronic equipment and a storage medium, which are used for overcoming the defects in the prior art.
The invention provides a satellite network topology measuring method, which comprises the following steps:
sending node detection data and path detection data to nodes in a satellite network, and receiving first feedback data returned by the nodes responding to the node detection data, second feedback data returned by the nodes responding to the path detection data and satellite data of the satellite network;
analyzing the topological links of the satellite network based on the first feedback data, the second feedback data and the satellite data to obtain a plurality of topological links;
performing interface alias detection analysis on the plurality of topological links to obtain an interface alias detection analysis result;
and determining the topological structure of the satellite network based on the interface alias detection analysis result.
According to the method for measuring the satellite network topology provided by the invention, the performing interface alias detection analysis on the plurality of topology links to obtain an interface alias detection analysis result comprises the following steps:
determining a node position relationship in the plurality of topological links based on the survival time of the data packets in the plurality of topological links and the network segment information of the nodes in the plurality of topological links, wherein the node position relationship comprises nodes on the same layer and nodes across links;
determining the result of the interface alias detection analysis based on a determination result obtained by determining whether at least one of the following conditions is satisfied:
whether the same-layer nodes belong to the same node or not;
whether the cross-link nodes belong to the same type of node;
whether the cross-link nodes belong to the same node;
whether the cross-link nodes belong to the same network segment.
According to the satellite network topology measurement method provided by the invention, the analyzing the topology links of the satellite network based on the first feedback data, the second feedback data and the satellite data to obtain a plurality of topology links comprises:
performing node analysis on the satellite network based on the first feedback data to determine node information of the satellite network;
performing node association analysis on the satellite network based on the second feedback data to determine path information of the satellite network;
performing satellite analysis on the satellite network based on the satellite data to determine satellite information and networking information of the satellite network;
and analyzing the topological links of the satellite network based on the node information, the path information, the satellite information and the networking information to obtain the plurality of topological links.
According to the method for measuring the topology of the satellite network provided by the invention, the determining the node information of the satellite network based on the first feedback data comprises the following steps:
and analyzing the first feedback data based on a communication protocol applied in the satellite network, and determining the node information.
According to the method for measuring the topology of the satellite network provided by the invention, the analyzing the first feedback data based on the communication protocol applied in the satellite network to determine the node information comprises the following steps:
and performing application layer analysis, transmission layer analysis, network layer analysis and connection layer analysis on the first feedback data to determine the node information.
According to the method for measuring the topology of the satellite network provided by the invention, the step of determining the topology structure of the satellite network based on the detection and analysis result of the alias of the interface comprises the following steps:
if the interface alias detection analysis result comprises node pairs belonging to the same node in the two topological links, aggregating the node pairs to obtain a first aggregation result;
if the interface alias detection analysis result comprises that two nodes belong to the same node in one topological link, aggregating the two nodes to obtain a second aggregation result;
determining the topology based on the first aggregation result and the second aggregation result.
According to the satellite network topology measuring method provided by the invention, the satellite network comprises a satellite network satellite section and a satellite network ground section, the satellite network satellite section comprises a satellite, and the satellite network ground section comprises ground equipment;
the satellite comprises a backbone satellite, an access satellite and a relay satellite, the ground equipment comprises a gateway station, ground internet equipment and ground mobile network equipment, and the gateway station is in communication connection with a ground control center.
The invention also provides a satellite network topology measuring device, comprising:
the wireless signal transceiving module is used for sending node detection data and path detection data to a node in a satellite network, and receiving first feedback data returned by the node responding to the node detection data, second feedback data returned by the node responding to the path detection data and satellite data of the satellite network;
a link analysis module, configured to perform topology link analysis on the satellite network based on the first feedback data, the second feedback data, and the satellite data to obtain multiple topology links;
the alias detection analysis module is used for carrying out interface alias detection analysis on the nodes on the plurality of topological links to obtain an interface alias detection analysis result;
and the topology measurement module is used for determining the topology structure of the satellite network based on the detection and analysis result of the interface alias.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the satellite network topology measuring method.
The invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a satellite network topology measurement method as described in any of the above.
The invention also provides a computer program product comprising a computer program which, when executed by a processor, implements a method of satellite network topology measurement as described in any one of the above.
The invention provides a satellite network topology measurement method, a device, electronic equipment and a storage medium, which are characterized in that node detection data and path detection data are sent to nodes in a satellite network, and first feedback data, second feedback data and satellite data of the satellite network returned by the nodes are received; then, performing node association analysis on the satellite network based on the first feedback data, the second feedback data and the satellite data to obtain an association analysis result, and performing topology link analysis based on the association analysis result to obtain a plurality of topology links; then, performing interface alias detection analysis on the nodes on the plurality of topological links to obtain an interface alias detection analysis result; and finally, determining the topological structure of the satellite network based on the detection and analysis result of the interface alias. The measurement of the topological structure of the satellite network is realized by actively sending node detection data and path detection data to nodes in the satellite network and receiving the first feedback data, the second feedback data and the satellite data of the satellite network, so that a network topology discovery, identification and management scheme in a satellite network scene is perfected.
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In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic flow chart of a method for measuring a topology of a satellite network according to the present invention;
FIG. 2 is a schematic diagram of a satellite network provided by the present invention;
FIG. 3 is a schematic diagram of topological links in a satellite network provided by the present invention;
FIG. 4 is a second flowchart of a method for measuring a satellite network topology according to the present invention;
FIG. 5 is a schematic structural diagram of a satellite network topology measuring device provided by the present invention;
fig. 6 is a schematic structural diagram of an electronic device provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Since a topology measurement method for a satellite network does not exist in the prior art, subsequent research on the satellite network and processing of capacity expansion and load balancing of the satellite network are not facilitated. Therefore, the embodiment of the invention provides a satellite network topology measurement method.
Fig. 1 is a schematic flowchart of a method for measuring a topology of a satellite network according to an embodiment of the present invention, where as shown in fig. 1, the method includes:
s1, sending node detection data and path detection data to nodes in a satellite network, and receiving first feedback data returned by the nodes responding to the node detection data, second feedback data returned by the nodes responding to the path detection data and satellite data of the satellite network;
s2, analyzing the topological links of the satellite network based on the first feedback data, the second feedback data and the satellite data to obtain a plurality of topological links;
s3, performing interface alias detection analysis on the plurality of topological links to obtain an interface alias detection analysis result;
s4, determining the topological structure of the satellite network based on the result of the interface alias detection analysis.
Specifically, an execution subject of the satellite network topology measurement method provided in the embodiment of the present invention is a satellite network topology measurement device, the device may be configured in a server, the server may be a local server or a cloud server, the local server may specifically be a computer, and the like, which is not specifically limited in the embodiment of the present invention.
Step S1 is executed first, and node probe data and path probe data are sent to nodes in the satellite network, and first feedback data returned by the nodes in response to the node probe data, second feedback data returned by the nodes in response to the path probe data, and satellite data of the satellite network are received. It will be appreciated that the satellite network may provide targeted services to user equipment. The satellite network topology measurement device may send node probe data as well as path probe data to nodes in the satellite network. The node in the satellite network refers to a network device in the satellite network, and the network device may be a communication device for implementing communication, or an application device that transmits information using the satellite network, such as a satellite, a ground device, and the like, which is not limited specifically herein. The node probe data refers to data for probing node information, and the path probe data refers to data for probing a path. Both the node probe data and the path probe data may be in the form of packets.
In the embodiment of the invention, when the satellite network topology measuring device sends the node detection data and the path detection data to the nodes in the satellite network, the connection between the satellite network topology measuring device and the satellite network can be established or not. When the connection is established, the satellite network topology measuring device sends node detection data and path detection data by a Transmission Control Protocol (TCP); when the connection is not established, the satellite network topology measuring device transmits node detection data and path detection data by using a User Datagram Protocol (UDP).
After receiving the node detection data and the path detection data, the node respectively responds to the node detection data and the path detection data to obtain and respectively return first feedback data and second feedback data to the satellite network topology measuring device, wherein the first feedback data corresponds to the node detection data, and the second feedback data corresponds to the path detection data. The first feedback data may represent information about nodes in the satellite network and the second feedback data may represent path information between nodes in the satellite network.
The satellite network topology measuring device may receive the first feedback data and the second feedback data returned by the nodes, and may also receive satellite data of the satellite network, in which the satellite data is data transmitted by a satellite or data that needs to be transmitted to the satellite, and the satellite data may be in the form of data packets, because the nodes in the satellite network perform data transmission in a broadcast manner.
The satellite network topology measuring device may be provided with a built-in wireless signal transceiver module, and the wireless signal transceiver module may be used to transmit the node detection data and the path detection data and receive the first feedback data, the second feedback data, and the satellite data. In addition, a modem can be further built in the satellite network topology measuring device, and the modem can modulate the transmitted node detection data and path detection data so as to transmit the modulated node detection data and path detection data to the satellite network through the wireless signal transceiver module. The modem can also demodulate the received first feedback data, the second feedback data and the satellite data, so that the satellite network topology measuring device can analyze the demodulated first feedback data, the demodulated second feedback data and the satellite data.
In the embodiment of the invention, the modem can be configured in the wireless signal receiving and transmitting module so as to realize the miniaturization design of the satellite network topology measuring device. In this case, the wireless signal transceiving module may include an outdoor unit, which may be a unit for receiving and transmitting the related data, and an indoor unit, which may be a unit for modulating and demodulating the related data. The outdoor unit may be an antenna and the indoor unit may be a modem, a router, etc.
Then, step S2 is executed, the satellite network topology measuring apparatus may analyze the topology links of the satellite network through the first feedback data, the second feedback data, and the satellite data and by combining with a communication protocol applied in the satellite network, so as to obtain a plurality of topology links, where each topology link may include an association relationship between nodes in the satellite network obtained by one feedback data or one satellite data. I.e. the number of topological links equals the number of received data.
When the topology link analysis is performed on the satellite network, the topology link analysis may be performed by analyzing the first feedback data, the second feedback data, and related information of each communication layer when the satellite data is transmitted, which is not specifically limited herein. The communication layers may include an application layer, a transport layer, a network layer, a connection layer, and the like. Here, the application layer functions to exchange application-specific information using the infrastructure network in cooperation with the application. The role of the transport layer is to resolve the type of service required. The network layer is used for resolving the IP address, and the purpose of the network layer is to realize transparent data transmission between two end systems, and the specific functions include addressing and routing, connection establishment, maintenance, termination and the like. It provides services that do not require the transport layer to be aware of the data transport and switching technology in the network. The connection layer is the ethernet layer. At the connection layer, information is transmitted in units of frames (frames). The frame is a finite sequence of 0/1.
Then, step S3 is executed to perform interface alias detection analysis on the plurality of topology links, that is, to determine whether the interface on each topology link belongs to the same node, whether the interfaces on each two topology links belong to the same node, and only the interface names are different, so as to obtain an interface alias detection analysis result, where the interface alias detection analysis result is whether the same node exists in any one or two topology links.
And finally, executing a step S4, determining the topology structure of the satellite network according to the result of the interface alias detection analysis, that is, determining whether the same node exists in different topology links according to the result of the interface alias detection analysis, so as to associate the topology links, thereby implementing the construction of the topology structure of the satellite network.
The determination process of the topological structure of the satellite network is a process of drawing the topological structure, each network device is used as a node of the topological structure, the device information and the position information of each network device are used as node information, and each node is connected through the relationship between each network device, namely the topological structure of the satellite network is generated.
It can be understood that, in order to prevent the phenomenon that the existing network devices are not timely accessed to the satellite network or new network devices are added to the satellite network and are not timely monitored, which further causes the phenomenon that the topology structure of the satellite network is inaccurate, a preset time interval can be set, and the satellite network topology measuring device can send network measurement data to each communication device in the satellite network at intervals of the preset time interval and continue to execute the subsequent steps. In order to reduce the load of the satellite network, the satellite network topology measuring device may disconnect from the satellite network after each execution of the satellite network topology measuring method.
The method for measuring the satellite network topology, provided by the embodiment of the invention, comprises the steps of firstly sending node detection data and path detection data to nodes in a satellite network, and receiving first feedback data, second feedback data and satellite data of the satellite network, which are returned by the nodes; then, performing node association analysis on the satellite network based on the first feedback data, the second feedback data and the satellite data to obtain an association analysis result, and performing topology link analysis based on the association analysis result to obtain a plurality of topology links; then, performing interface alias detection analysis on any two topological links to obtain an interface alias detection analysis result; and finally, determining the topological structure of the satellite network based on the interface alias detection analysis result. The measurement of the topological structure of the satellite network is realized by actively sending node detection data and path detection data to nodes in the satellite network and receiving the first feedback data, the second feedback data and the satellite data of the satellite network, so that a network topology discovery, identification and management scheme in a satellite network scene is perfected.
As shown in fig. 2, on the basis of the foregoing embodiment, the satellite network topology measuring method provided in the embodiment of the present invention includes a satellite network satellite segment 1 and a satellite network ground segment 2, where the satellite network satellite segment 1 includes a satellite and the satellite network ground segment 2 includes ground equipment;
the satellite comprises a backbone satellite, an access satellite and a relay satellite, the ground equipment comprises a gateway station, ground internet equipment and ground mobile network equipment, and the gateway station is in communication connection with a ground control center.
Specifically, in the embodiment of the present invention, the satellite segment 1 of the satellite network refers to a network that implements communication through a satellite, the ground segment 2 of the satellite network refers to a network that implements communication through ground equipment, and the user equipment refers to application equipment that implements information transmission by communicating through the satellite network. Wherein, the satellite section 1 of the satellite network is connected with the ground section 2 of the satellite network in a communication way.
Both satellite and terrestrial devices belong to communication devices. The satellites may include backbone satellites 11, access satellites 12, and relay satellites 13, and the ground equipment includes gateway stations 21, ground internetwork equipment 22, and ground mobile network equipment 23, and the gateway stations 21 are communicatively coupled to a ground control center 24.
The satellite network satellite segment 1 may include a plurality of access satellites 12 and a plurality of backbone satellites 11. The plurality of access satellites 12 may form a single-orbit networking 25, the plurality of backbone satellites 11 and the single-orbit networking 25 may form a multi-orbit satellite networking 26, the multi-orbit networking 26 being part of a satellite segment 27 of a satellite network.
The satellite network ground segment 2 may include a plurality of gateway stations 21, each gateway station 21 being connected to a ground control center 24.
The satellite network topology measuring device 0 can directly enter the satellite segment 1 of the satellite network, and can also be connected with the gateway station 21 through the ground internet equipment 22 and the ground mobile network equipment 23 so as to access the ground segment 2 of the satellite network.
The user equipment 3 may comprise a space-based user equipment 31, a space-based user equipment 32, a sea-based user equipment 33 and a land-based user equipment 34. The space-based user equipment 31 refers to user equipment operating on the sky, such as satellites, beidous and the like, the space-based user equipment 32 refers to user equipment operating in the air, such as space shuttles, spacecrafts, missiles, rockets and the like, the sea-based user equipment 33 refers to user equipment operating on the sea, such as ships and the like, and the land-based user equipment 34 refers to user equipment operating on the ground, such as mobile phones, computers, servers and the like. Therefore, due to the fact that the types of the related user equipment are wide, the satellite network topology result under the terrestrial, sea, air and sky scenes can be improved, and a foundation is laid for topology surveying and mapping of the satellite network.
Both space based user equipment 31 and space based user equipment 32 may have direct access to the satellite network satellite segment 1 through the backbone satellite 11. The sea-based user equipment 33 can be directly connected to the satellite network satellite segment 1 through the backbone satellite 11, and can also be directly connected to the satellite network satellite segment 1 through the access satellite 12. The roadbed user equipment 34 can be directly connected to the satellite network satellite segment 1 through the access satellite 12 and the backbone satellite 11, can also be directly connected to the satellite network ground segment 2 through a gateway, and can also be directly connected to the satellite network ground segment 2 through a ground network.
Therefore, when the satellite network topology measuring device is connected with the satellite network, the satellite network can be accessed by adopting a satellite access mode and a ground equipment access mode based on a satellite network access protocol. It is understood that the satellite access mode refers to a mode of accessing the satellite network through the backbone satellite, the access satellite and the relay satellite in the satellite segment 1 of the satellite network, and the ground equipment access refers to a mode of accessing the satellite network through the gateway station 21, the ground internet equipment 22 and the ground mobile network equipment 23 in the ground segment 2 of the satellite network. In addition, ground equipment access can also be achieved through a small station, and the small station can be composed of a small-caliber antenna, an outdoor unit and an indoor unit.
In the embodiment of the invention, the specific structure of the satellite network and the access mode of the satellite network are provided, so that the satellite network topology measuring device can be ensured to be smoothly accessed into the satellite network, and the practicability of the satellite network topology measuring method is improved.
On the basis of the foregoing embodiment, the method for measuring a satellite network topology according to an embodiment of the present invention, where performing interface alias detection analysis on the plurality of topology links to obtain an interface alias detection analysis result, includes:
determining a node position relationship in the plurality of topological links based on the survival time of the data packets in the plurality of topological links and the network segment information of the nodes in the plurality of topological links, wherein the node position relationship comprises nodes on the same layer and nodes across links;
determining the result of the interface alias detection analysis based on a determination result obtained by determining whether at least one of the following conditions is satisfied:
whether the same-layer nodes belong to the same node or not;
whether the cross-link nodes belong to the same type of node;
whether the cross-link nodes belong to the same node;
whether the cross-link nodes belong to the same network segment.
Specifically, in the embodiment of the present invention, when performing interface alias detection analysis on a node, a node position relationship in all topology links may be determined according To Time To Live (TTL) of a data packet in each topology link and network segment information of the node in each topology link, where the node position relationship may include a peer node and a cross-link node, the peer node refers To a node in the same layer in a satellite network, and the cross-link node refers To a node having an association in different topology links.
Fig. 3 is a schematic diagram of topology links in a satellite network, and as shown in fig. 3, a satellite network topology measurement apparatus sends node probe data and path probe data to the satellite network, where each topology link may be measured in a different manner, for example, the topology link 1 may be in a TCP manner, and the topology link 2 may be in a UDP manner, which is not limited herein.
The satellite network comprises a plurality of topological links, each topological link comprises a plurality of nodes, for example, the topological link 1 can comprise a node 1-a node 3-a node P-a node M and a node 1-a node 3-a node P-a node Q-a node N, and the topological link 2 can comprise a node 2-a node Q-a node N and a node 2-a node Q-a node P-a node M. Each layer in the topological link corresponds to the same TTL. As can be seen from fig. 3, node 1 and node 2 are nodes on the same layer, and node P and node Q are cross-link nodes.
Then, by adopting an alias detection technology, whether at least one of the following conditions is satisfied is judged to obtain a judgment result, and the judgment result can be used as an interface alias detection analysis result:
the first condition is as follows: whether the nodes on the same layer belong to the same node or not can be judged by judging whether the interfaces used by the nodes on the same layer belong to different interfaces of the same node or not.
And a second condition: whether the cross-link nodes belong to the same type of node;
and (3) carrying out a third condition: whether the cross-link nodes belong to the same node or not can be judged by judging whether the interfaces used by the cross-link nodes belong to different interfaces of the same node or not.
And a fourth condition: whether the cross-link nodes belong to the same network segment can be judged by comparing the network segment information of the cross-link nodes.
In the embodiment of the invention, alias detection is introduced, so that the finally determined topological structure of the satellite network is more accurate.
On the basis of the foregoing embodiment, the method for measuring a topology of a satellite network according to an embodiment of the present invention, where the analyzing a topology link of the satellite network based on the first feedback data, the second feedback data, and the satellite data to obtain a plurality of topology links includes:
performing node analysis on the satellite network based on the first feedback data to determine node information of the satellite network;
performing node association analysis on the satellite network based on the second feedback data to determine path information of the satellite network;
performing satellite analysis on the satellite network based on the satellite data to determine satellite information and networking information of the satellite network;
and analyzing the topological links of the satellite network based on the node information, the path information, the satellite information and the networking information to obtain the plurality of topological links.
Specifically, in the embodiment of the present invention, when performing topology link analysis on a satellite network to obtain multiple topology links, node analysis may be performed on the satellite network through the first feedback data to determine node information of the satellite network. That is, node information may be analyzed from the first feedback data by using an application Layer Protocol such as a hypertext Transfer Protocol (HTTP), a hypertext Transfer Protocol over secure session Layer (HTTPs) targeted for security, a Simple Network Management Protocol (SNMP), a routing Protocol, and a communication Protocol of other satellite networks, where the node information may include information such as a node ID and a node type.
And performing node correlation analysis on the satellite network through the second feedback data to determine path information of the satellite network. That is, the path information is analyzed from the second feedback data through the communication protocol of the satellite network, and the path information includes the association relationship between the nodes, that is, for a certain node, the upper and lower nodes of the node are determined.
And satellite analysis is carried out on the satellite network through satellite data, and satellite information and networking information of the satellite network are determined. That is, satellite information and networking information are analyzed from satellite data through a communication protocol of a satellite network. The satellite information refers to information on satellites included in the satellite network and their IDs, types, locations, affiliations, and the like. As in fig. 3, node 1 and node 2 are both satellites comprised in the satellite network.
And finally, analyzing the topological links of the satellite network by combining the node information, the path information, the satellite information and the networking information to obtain a plurality of topological links.
In the embodiment of the invention, the node analysis, the node association analysis and the satellite analysis are respectively carried out on the satellite network, and the related information in the satellite network is obtained from different angles, thereby providing help for accurately determining the topological structure of the satellite network.
On the basis of the foregoing embodiment, the method for measuring a topology of a satellite network according to the present invention, where the performing node analysis on the satellite network based on the first feedback data to determine node information of the satellite network includes:
and analyzing the first feedback data based on a communication protocol applied in the satellite network, and determining the node information.
Specifically, in the embodiment of the present invention, when determining the node information, the node information may be determined by analyzing the first feedback data through a communication protocol applied in the satellite network.
The communication protocols applied in the satellite network include application layer protocols, transport layer protocols, network layer protocols, and connection layer protocols. Wherein,
application layer protocols may include Domain Name System (DSN) protocols, hypertext Transfer Protocol (HTTP), File Transfer Protocol (FTP), Simple Mail Transfer Protocol (SMTP), Simple Network Management Protocol (SNMP), and TELNET Protocol (TELNET). The DSN protocol enables mapping of domain names to ip. HTTP is a simple request-response protocol that specifies what messages a client can send to a server and what responses it can get. FTP can allow a user to communicate with another host in a file-operated manner (i.e., file transfer). SMTP is used for realizing the function of transmitting the electronic mailbox. SNMP is used to manage and monitor network devices (i.e., the functionality of routers). The TELNET protocol is used to implement TELNET functionality.
Transport layer protocols include Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). TCP is a connection-oriented, reliable, byte stream-based transport layer communication protocol; UDP is a connectionless transport layer protocol in the OSI reference model. Both TCP and UDP are concerned about how messages are handled at the Host or Application layer, such as out-of-order, loss, retransmission, etc.
The network layer Protocol includes an Address Resolution Protocol (ARP), an Internet Protocol (IP), an Internet Control Message Protocol (ICMP), and an Internet Group Management Protocol (IGMP). ARP serves IP, which serves ICMP, which serves IGMP.
Network layer protocols also include routing protocols that operate primarily on routers, which are used to determine paths to reach. The routing protocol is one of the important members in the TCP/IP protocol family, and the efficiency of the whole Internet network is affected by the implementation quality of the routing process. Routing protocols can be divided into two categories, depending on the application: in an AS (Autonomous System, an Autonomous System, refers to an interconnection network, that is, the whole Internet is divided into a plurality of smaller network units, and these smaller networks have the right to autonomously determine what routing protocol should be used in the System), a routing protocol within the AS is called an interior gateway protocol (interior gateway protocol), and a routing protocol between the ASs is called an exterior gateway protocol (exterior gateway protocol). Where the gateway is the old term for a router. The interior gateway routing protocols in use are the following: RIP-1, RIP-2, IGRP, EIGRP, IS-IS and OSPF. The first 3 routing protocols adopt a distance vector algorithm, the IS-IS and OSPF adopt a link state algorithm, and the EIGRP IS a Cisco private routing protocol combining a link state and a distance vector type routing protocol. For a small network, a routing protocol based on a distance vector algorithm is easy to configure and manage and is widely applied, but when the routing protocol faces a large network, not only the inherent loop problem becomes more difficult to solve, but also the occupied bandwidth rapidly increases, so that the network cannot bear the problem. Therefore, for large networks, IS-IS and OSPF using link-state algorithms are more efficient and widely used. IS-IS IS not as different in quality and performance from OSPF, but OSPF IS more applicable to IP and more viable than IS-IS. The IETF IS always working on an improvement of OSPF, which modifies the cadence much faster than IS-IS. This makes OSPF a widely used routing protocol. OSPF is considered the indispensable routing protocol, both in traditional router design and in MPLS (multi-protocol label switching) which is becoming standard.
The connection layer protocol Ethernet (Ethernet) protocol and the WiFi protocol.
In addition, when the path information, the satellite information and the networking information are determined, the second feedback data and the satellite data can be analyzed through a communication protocol applied in a satellite network, and the path information, the satellite information and the networking information are respectively determined.
On the basis of the foregoing embodiment, the method for measuring a topology of a satellite network according to the present invention, where the analyzing the first feedback data based on a communication protocol applied in the satellite network to determine the node information includes:
and performing application layer analysis, transmission layer analysis, network layer analysis and connection layer analysis on the first feedback data to determine the node information.
Specifically, in the embodiment of the present invention, the analysis processes of the first feedback data, the second feedback data and the satellite data are consistent, and the first feedback data is taken as an example here. The first feedback data is analyzed, that is, the first feedback data is subjected to application layer analysis, transmission layer analysis, network layer analysis and connection layer analysis, so that analysis results corresponding to each layer can be obtained. And by combining the analysis results, the node information can be comprehensively analyzed and determined.
In the embodiment of the invention, the node information in the satellite network can be quickly determined by performing application layer analysis, transmission layer analysis, network layer analysis and connection layer analysis on the feedback data, so that the topology measurement efficiency of the satellite network is improved.
On the basis of the foregoing embodiment, the method for measuring a topology of a satellite network according to an embodiment of the present invention, where determining a topology structure of the satellite network based on the result of the interface alias detection analysis includes:
if the interface alias detection analysis result comprises node pairs belonging to the same node in the two topological links, aggregating the node pairs to obtain a first aggregation result;
if the interface alias detection analysis result comprises that two nodes belong to the same node in one topological link, aggregating the two nodes to obtain a second aggregation result;
determining the topology based on the first aggregation result and the second aggregation result.
Specifically, in the embodiment of the present invention, when determining the topology structure of the satellite network according to the result of the interface alias detection analysis, the result of the interface alias detection analysis may include that a node pair belonging to the same node exists in two topology links, that two nodes belong to the same node exist in one topology link, and that two nodes belonging to the same node do not exist in all topology links.
When the result of the detection and analysis of the alias of the interface includes that a node pair belonging to the same node exists in the two topological links, the two topological links need to be aggregated, that is, a node pair belonging to the same node in the two topological links is aggregated, so that the two topological links share different interfaces of the same node, and a first aggregation result is obtained.
When the result of the interface alias detection analysis includes that two nodes in one topology link belong to the same node, the two nodes need to be aggregated, so that only one node belonging to the same node exists on the topology link, and a second aggregation result is obtained.
And then, integrating the first aggregation results or the second aggregation results corresponding to all the topological links, namely associating all the topological links by using the nodes shared among all the topological links to finally obtain the topological structure of the satellite network.
Fig. 4 is a schematic diagram of a complete flow of a satellite network topology measurement method provided in an embodiment of the present invention, as shown in fig. 4, the method includes:
receiving node detection data and path detection data returned by the nodes, and acquiring satellite data;
performing node analysis on the satellite network through the node detection data to obtain node information;
performing node association analysis on the satellite network through the path detection data to obtain path information;
satellite analysis is carried out on a satellite network through satellite data to obtain satellite information and networking information;
analyzing topological links of the satellite network by combining the node information, the path information, the satellite information and the networking information to obtain a plurality of topological links;
performing alias detection analysis on the plurality of topological links to obtain an interface alias detection analysis result;
if the interface alias detection analysis result comprises node pairs belonging to the same node in the two topological links, aggregating the node pairs to obtain a first aggregation result;
if the interface alias detection analysis result comprises that two nodes belong to the same node in one topological link, aggregating the two nodes to obtain a second aggregation result;
based on the first aggregation result and the second aggregation result, a topology of the satellite network is determined.
In summary, the satellite network topology measurement method provided in the embodiment of the present invention can implement measurement of the topology structure of the satellite network, and ensure accuracy and integrity of the obtained topology structure.
As shown in fig. 5, on the basis of the above embodiment, an embodiment of the present invention provides a satellite network topology measuring apparatus, including:
a wireless signal transceiver module 51, configured to send node probe data and path probe data to a node in a satellite network, and receive first feedback data returned by the node in response to the node probe data, second feedback data returned by the node in response to the path probe data, and satellite data of the satellite network;
a link analysis module 52, configured to perform topology link analysis on the satellite network based on the first feedback data, the second feedback data, and the satellite data to obtain multiple topology links;
an alias detection and analysis module 53, configured to perform interface alias detection and analysis on the plurality of topology links to obtain an interface alias detection and analysis result;
a topology measurement module 54, configured to determine a topology structure of the satellite network based on the result of the interface alias detection analysis.
On the basis of the above embodiment, the satellite network topology measuring apparatus provided in the embodiment of the present invention includes a satellite network satellite segment and a satellite network ground segment, where the satellite network satellite segment includes a satellite and the satellite network ground segment includes ground equipment;
the satellite comprises a backbone satellite, an access satellite and a relay satellite, the ground equipment comprises a gateway station, ground internet equipment and ground mobile network equipment, and the gateway station is in communication connection with a ground control center.
On the basis of the foregoing embodiment, in the satellite network topology measuring apparatus provided in the embodiment of the present invention, the alias detection analysis module is specifically configured to:
determining a node position relationship in the plurality of topological links based on the survival time of the data packets in the plurality of topological links and the network segment information of the nodes in the plurality of topological links, wherein the node position relationship comprises nodes on the same layer and nodes across links;
determining the result of the interface alias detection analysis based on a determination result obtained by determining whether at least one of the following conditions is satisfied:
whether the same-layer nodes belong to the same node or not;
whether the cross-link nodes belong to the same type of node;
whether the cross-link nodes belong to the same node;
whether the cross-link nodes belong to the same network segment.
On the basis of the foregoing embodiment, in the satellite network topology measuring apparatus provided in the embodiment of the present invention, the link analysis module is specifically configured to:
performing node analysis on the satellite network based on the first feedback data to determine node information of the satellite network;
performing node association analysis on the satellite network based on the second feedback data to determine path information of the satellite network;
performing satellite analysis on the satellite network based on the satellite data to determine satellite information and networking information of the satellite network;
and analyzing the topological links of the satellite network based on the node information, the path information, the satellite information and the networking information to obtain the plurality of topological links.
On the basis of the foregoing embodiment, in the satellite network topology measuring apparatus provided in the embodiment of the present invention, the link analysis module is further specifically configured to:
and analyzing the first feedback data based on a communication protocol applied in the satellite network, and determining the node information.
On the basis of the foregoing embodiment, in the satellite network topology measuring apparatus provided in the embodiment of the present invention, the link analysis module is further specifically configured to:
and performing application layer analysis, transmission layer analysis, network layer analysis and connection layer analysis on the first feedback data to determine the node information.
On the basis of the foregoing embodiment, in the satellite network topology measurement apparatus provided in the embodiment of the present invention, the topology measurement module is specifically configured to:
if the interface alias detection analysis result comprises node pairs belonging to the same node in the two topological links, aggregating the node pairs to obtain a first aggregation result;
if the interface alias detection analysis result comprises that two nodes belong to the same node in one topological link, aggregating the two nodes to obtain a second aggregation result;
determining the topology based on the first aggregation result and the second aggregation result.
On the basis of the foregoing embodiment, in the satellite network topology measurement apparatus provided in the embodiment of the present invention, the communication protocol applied in the satellite network includes an application layer protocol, a transport layer protocol, a network layer protocol, and a connection layer protocol.
Specifically, the functions of the modules in the satellite network topology measuring apparatus provided in the embodiment of the present invention correspond to the operation flows of the steps in the method embodiments one to one, and the implementation effect is also consistent.
Fig. 6 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 6: a Processor (Processor) 610, a communication Interface (Communications Interface) 620, a Memory (Memory) 630 and a communication bus 640, wherein the Processor 610, the communication Interface 620 and the Memory 630 communicate with each other via the communication bus 640. The processor 610 may invoke logic instructions in the memory 630 to perform the satellite network topology measurement method provided in the embodiments described above, the method comprising: sending node detection data and path detection data to nodes in a satellite network, and receiving first feedback data returned by the nodes responding to the node detection data, second feedback data returned by the nodes responding to the path detection data and satellite data of the satellite network; analyzing the topological links of the satellite network based on the first feedback data, the second feedback data and the satellite data to obtain a plurality of topological links; performing interface alias detection analysis on the plurality of topological links to obtain an interface alias detection analysis result; and determining the topological structure of the satellite network based on the interface alias detection analysis result.
In addition, the logic instructions in the memory 630 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
In another aspect, the present invention also provides a computer program product comprising a computer program, the computer program being storable on a non-transitory computer readable storage medium, the computer program, when executed by a processor, being capable of performing a satellite network topology measurement method, the method comprising: sending node detection data and path detection data to nodes in a satellite network, and receiving first feedback data returned by the nodes responding to the node detection data, second feedback data returned by the nodes responding to the path detection data and satellite data of the satellite network; analyzing the topological links of the satellite network based on the first feedback data, the second feedback data and the satellite data to obtain a plurality of topological links; performing interface alias detection analysis on the plurality of topological links to obtain an interface alias detection analysis result; and determining the topological structure of the satellite network based on the interface alias detection analysis result.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program that, when executed by a processor, is implemented to perform a method of satellite network topology measurement, the method comprising: sending node detection data and path detection data to nodes in a satellite network, and receiving first feedback data returned by the nodes responding to the node detection data, second feedback data returned by the nodes responding to the path detection data and satellite data of the satellite network; analyzing the topological links of the satellite network based on the first feedback data, the second feedback data and the satellite data to obtain a plurality of topological links; performing interface alias detection analysis on the plurality of topological links to obtain an interface alias detection analysis result; and determining the topological structure of the satellite network based on the interface alias detection analysis result.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for measuring topology of a satellite network is characterized by comprising the following steps:
sending node detection data and path detection data to nodes in a satellite network, and receiving first feedback data returned by the nodes responding to the node detection data, second feedback data returned by the nodes responding to the path detection data and satellite data of the satellite network;
analyzing the topological links of the satellite network based on the first feedback data, the second feedback data and the satellite data to obtain a plurality of topological links;
performing interface alias detection analysis on the plurality of topological links to obtain an interface alias detection analysis result;
and determining the topological structure of the satellite network based on the interface alias detection analysis result.
2. The method according to claim 1, wherein the performing interface alias detection analysis on the plurality of topology links to obtain an interface alias detection analysis result comprises:
determining a node position relationship in the plurality of topological links based on the survival time of the data packets in the plurality of topological links and the network segment information of the nodes in the plurality of topological links, wherein the node position relationship comprises nodes on the same layer and nodes across links;
determining the result of the interface alias detection analysis based on a determination result obtained by determining whether at least one of the following conditions is satisfied:
whether the nodes on the same layer belong to the same node or not;
whether the cross-link nodes belong to the same type of node;
whether the cross-link nodes belong to the same node;
whether the cross-link nodes belong to the same network segment.
3. The method of claim 1, wherein the analyzing the topology links of the satellite network based on the first feedback data, the second feedback data and the satellite data to obtain a plurality of topology links comprises:
performing node analysis on the satellite network based on the first feedback data to determine node information of the satellite network;
performing node association analysis on the satellite network based on the second feedback data to determine path information of the satellite network;
performing satellite analysis on the satellite network based on the satellite data to determine satellite information and networking information of the satellite network;
and analyzing the topological links of the satellite network based on the node information, the path information, the satellite information and the networking information to obtain the plurality of topological links.
4. The method according to claim 3, wherein the performing node analysis on the satellite network based on the first feedback data to determine node information of the satellite network comprises:
and analyzing the first feedback data based on a communication protocol applied in the satellite network, and determining the node information.
5. The method according to claim 4, wherein the analyzing the first feedback data based on a communication protocol applied in the satellite network to determine the node information comprises:
and performing application layer analysis, transmission layer analysis, network layer analysis and connection layer analysis on the first feedback data to determine the node information.
6. The method according to claim 1, wherein the determining the topology structure of the satellite network based on the result of the interface alias detection analysis comprises:
if the interface alias detection analysis result comprises node pairs belonging to the same node in the two topological links, aggregating the node pairs to obtain a first aggregation result;
if the interface alias detection analysis result comprises that two nodes belong to the same node in one topological link, aggregating the two nodes to obtain a second aggregation result;
determining the topology based on the first aggregation result and the second aggregation result.
7. The method of any of claims 1-6, wherein the satellite network comprises a satellite network satellite segment comprising satellites and a satellite network ground segment comprising ground equipment;
the satellite comprises a backbone satellite, an access satellite and a relay satellite, the ground equipment comprises a gateway station, ground internet equipment and ground mobile network equipment, and the gateway station is in communication connection with a ground control center.
8. A satellite network topology measurement device, comprising:
the wireless signal transceiving module is used for sending node detection data and path detection data to a node in a satellite network, and receiving first feedback data returned by the node responding to the node detection data, second feedback data returned by the node responding to the path detection data and satellite data of the satellite network;
a link analysis module, configured to perform topology link analysis on the satellite network based on the first feedback data, the second feedback data, and the satellite data to obtain multiple topology links;
the alias detection analysis module is used for carrying out interface alias detection analysis on the nodes on the plurality of topological links to obtain an interface alias detection analysis result;
and the topology measurement module is used for determining the topology structure of the satellite network based on the detection and analysis result of the interface alias.
9. 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 satellite network topology measurement method according to any one of claims 1 to 7 when executing the program.
10. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the satellite network topology measurement method of any of claims 1 to 7.
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