CN104954166B - A kind of hardware based network (WSN) emulation system and emulation mode - Google Patents
A kind of hardware based network (WSN) emulation system and emulation mode Download PDFInfo
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- CN104954166B CN104954166B CN201510206210.0A CN201510206210A CN104954166B CN 104954166 B CN104954166 B CN 104954166B CN 201510206210 A CN201510206210 A CN 201510206210A CN 104954166 B CN104954166 B CN 104954166B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/14—Network analysis or design
- H04L41/145—Network analysis or design involving simulating, designing, planning or modelling of a network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/24—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks using dedicated network management hardware
Abstract
The invention discloses a kind of hardware based network (WSN) emulation system, which includes a network analog unit, for adjusting the topological diagram of simulation node in artificial network according to user, and is configured to the emulation link characteristic parameters connecting with simulation node；Multiple simulation nodes, the link characteristic parameters based on network topological diagram adjusted and configuration carry out the emulation experiment of network protocol or business procedure using emulation link.The present invention further discloses a kind of emulation modes based on above-mentioned network (WSN) emulation system.Technical solution of the present invention is connected by a network simulator computer (or embedded device) with several simulation node computers compared with traditional network experimental platform, network topology change and emulation link characteristic parameters configuration are realized by the analog control system operated on network simulator computer, realize the experimental verification fairly large under heterogeneous networks topology, link characteristic parameters to network protocol of a small amount of common computer.
Description
Technical field
The present invention relates to computer networking technologies, more particularly to a kind of hardware based network (WSN) emulation system and emulation side
Method.
Background technique
In the design of Internet agreement, experimental verification is one of them critically important link.In the prophesy stage
In early-stage study, the deployment experiment for carrying out large area is infeasible, thus using simulation means to communication protocol or Routing Protocol into
Row heterogeneous networks topology is necessary with the performance test under link property.
Currently, the emulation for the performance of network protocol mainly has a software emulation and the methods of simple demo system is built.
Wherein network software emulation is statistical model by establishing the network equipment and network link, and the transmission of analog network flow,
To obtain network design or optimize the emulation technology of required network performance data.Since software emulation is not based on mathematics
It calculates, but is based on statistical model, therefore, the randomness of statistic multiplexing is accurately reproduced, but since calculation amount is huge, is difficult
Realize real-time, while software emulation cannot achieve actual physical interface, simulation result and reality there may be certain gap；Letter
The method that single demo system is built is to build fixed topological environmental by preparatory topology design in laboratory environment, this is imitative
True mode is true, credible, some problems of energy reaction network agreement, but tests topology and fix, and the configuration of network link characteristic is stranded
Difficulty, operating flexibility are poor, it is difficult to realize fairly large emulation experiment.
Therefore, it is necessary to construct a kind of network (WSN) emulation system, leads to too small amount of common computer and realize to network protocol not
Fairly large experimental verification under same network topology, link characteristic parameters.
Summary of the invention
In order to solve the above technical problems, the specific technical solution of the present invention is hardware based network (WSN) emulation system by one
Network simulator and several simulation nodes form.Network simulator is a multiport computer or embedded device, is transported thereon
Row have Topology g eneration software, link property configuration software, manage simulation node software server end, can by user interface into
The configuration of row Local or Remote；Simulation node is entity computer or virtual machine, runs the network protocol journey of test in need
Sequence or business procedure.
Network simulator is mainly responsible for the parameter configuration of Topology g eneration, each emulation link；
1) artificial network topological diagram, connection topological generation: are generated according to the Connectivity matrix of user configuration first
Property matrix indicate network topology in Connectivity situation, network simulator go control node by Connectivity matrix two-by-two
Between connectivity；
2) link characteristic parameters configure: in the present invention, to make full use of computer resource, each mould of network simulator
Quasi- physical port is invented multiple virtual ports, the corresponding virtual link of each virtual port, every virtual link root
There are the characteristics such as corresponding bandwidth, time delay, shake, the bit error rate according to emulation demand, each virtual link characterisitic parameter uses link
Software configuration is controlled, linux system TC (Traffic Control) tool such as can be used and configured, a virtual link pair
A channel under respective physical ether port is answered, configures difference by configuring under TC tool queue discipline, class and filter
Virtual link characterisitic parameter.
Simulation node, operation have experimental network agreement or business procedure, can be used as source, destination node, routing node etc..Often
A simulation node has a control port and an analog port: control port connect interchanger, for remotely managing and configuring；
Analog port connects network simulator, is used for emulation experiment.Meanwhile in order to improve the simplification of simulation operations, simulation node is also
The client-side program of operational management simulation node software.To save computer resource, one physics is imitated using virtual machine technique
True node virtual is several virtual emulation nodes.Dummy node and physical node are without any difference.
The overall technical architecture that the present invention uses is as follows:
A kind of hardware based network (WSN) emulation system, the system include
One network analog unit, the simulation node connectivity matrix based on user configuration generate artificial network topological diagram,
And emulation link characteristic parameters are configured；
Multiple simulation nodes carry out network protocol based on the link characteristic parameters of the artificial network topological diagram and configuration
Or the emulation experiment of business procedure.
Preferably, the network analog unit includes
Topology g eneration module generates artificial network topological diagram according to the Connectivity matrix；
Link configuration module emulates demand according to user and carries out parameter configuration to emulation link；
Node control module is controlled substantially based on simulation node in control link pair network.
Preferably, the network analog unit includes
Node administration server obtains the emulation link topology letter of simulation node in artificial network by control link in real time
Breath and simulation node experimental data, and node control information is sent to simulation node by controlling link；
Topology Discovery module, for periodically transferring simulation node topology information from node administration server, and
Pass through user interface real-time display.
Preferably, the network analog unit includes
Database, for storing the topological diagram information and link configuration information of user configuration；
General module, for establishing the information exchange of network analog unit and user, based on user instruction in database
Data carry out format check, insertion, modification and delete operation.
Preferably, the simulation node includes node administration client, for by the experimental data of current simulation node
The node control information for being collected management and being issued based on the node administration server controls simulation node.
Preferably, the simulation node includes
The control port connecting with the interchanger of remote terminal is used to form control link, realizes long-range management and configuration；
The analog port connecting with network analog unit is used to form emulation link, executes emulation experiment.
A kind of the step of emulation mode based on network (WSN) emulation system described in claim 1, this method includes
The IP address of each emulated port of user configuration simulation node and network analog unit, and in network analog unit
In simulation node information is registered；
Connectivity matrix based on user configuration generates artificial network topological diagram, and to emulation link characteristic parameters into
Row configuration；
Simulation node carries out emulation in fact using the artificial network topological diagram and link characteristic parameters as experiment simulation environment
It tests；
Experimental data is collected, obtains the simulation experiment result through analysis.
Preferably, the configuration step of the simulation node includes
According to the IP address information of the emulation each emulated port of demand Configuration network simulator, it such as can configure different emulation ends
Mouth IP address network number is different, does not configure to its gateway with DNS；
Corresponding virtual port is configured according to the number of the corresponding simulation node of network analog unit emulation physical port,
Configuration method according to demand depending on, it is different such as to can configure each virtual port IP address network number；
The IP address of the emulated port of simulation node is configured, configuration method is imitative because such as can configure each simulation node depending on demand
The network number of the coupled network simulator emulated port IP address of true port IP address network number is identical, and gateway is corresponding net
The IP address of network analogue unit port, while the IP address including its virtual port, do not configure simulation node emulated port
DNS。
Preferably, the step of this method further comprises the artificial network topological diagram that will be adjusted every time, simulation node connection
Property and link characteristic parameters deposit database in, restart matching for post-simulation network topology and link characteristic parameters for simulation system
It sets and restores.
Preferably, the step of this method further comprises
Use the topological diagram at method configuration emulation experiment each moment that predetermined file importing or user interface directly input
With link property；
System, which is periodically detected, obtains artificial network topological diagram or the situation of change of link property different moments；
Dynamic configuration is carried out to emulation link according to the topological diagram of acquisition or link property situation of change.
The present invention builds fairly large, topological dynamically configurable, link property using a small amount of common computer
The network protocol experimental situation that parameter can match.For example, network simulator is done using the common computer of 10 ports, in 9
Common computer Deng configuration, 2 ports do physical simulation node, it can be achieved that 81 nodes simulation scale, and 81 nodes
The network topology of composition can pass through Simulation Platform Software system arbitrary disposition with corresponding link characteristic parameters.
Beneficial effects of the present invention are as follows:
Traditional network experimental platform topology fixation, small scale, configuration are cumbersome, and the corresponding network of a computer is imitative
True node, serious waste computer resource.Technical solution of the present invention passes through (or the insertion of network simulator computer
Formula equipment) it is connected with several simulation node computers, it is real by the analog control system operated on network simulator computer
Existing network topology change and link characteristic parameters configure, and realize that a small amount of common computer opens up network protocol in heterogeneous networks
It flutters, experimental verification fairly large under link characteristic parameters.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing；
Fig. 1 shows the schematic diagram of simple network topological diagram in the embodiment of the present invention；
Fig. 2 shows the schematic diagrames of the corresponding connection matrix of simple network topological diagram in the embodiment of the present invention；
Fig. 3 shows the schematic diagram of link characteristic parameters allocation plan one in the embodiment of the present invention；
Fig. 4 shows the schematic diagram of link characteristic parameters allocation plan two in the embodiment of the present invention；
Fig. 5 shows the schematic diagram of network (WSN) emulation system of the present invention；
Fig. 6 shows the schematic diagram of complex simulation network topological diagram in the embodiment of the present invention；
Fig. 7 shows the structure chart of network (WSN) emulation system of the present invention.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further below with reference to preferred embodiments and drawings
It is bright.Similar component is indicated in attached drawing with identical appended drawing reference.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
As shown in Figure 1 it is a simple example network topology, illustrates the specific of Topology g eneration in the present invention with it herein
Method.Topology g eneration is based on such a principle, i.e., no matter more complicated topological diagrams can use the connection of node between any two
Property indicates.In the present invention, in order to meet the needs of some ad hoc network agreement researchs, such as network protocol in mobile ad hoc network
Research, connection have directionality: it is assumed that node H1, H2, H1- > H2 connection do not represent H2- > H1 connection.Such as, if H1 node can only
H2 is sent messages to, and the message of H2 node cannot be received, then connection implementations at this time are H1- > H2 connections, and H2- > H1 does not connect
It is logical.
As shown in Fig. 2, the matrix for above-mentioned simple network topology connectivity indicates.Wherein, the row and column of matrix successively table
Show node H1, H2, H3, in matrix corresponding position be 0 expression the two nodes between be not connected to, 1 indicate the two nodes it
Between be connected to, between node and node itself be connected relation.Topology g eneration software reads the connectivity of matrix with behavior unit, figure
In 2 the first row of matrix represent node H1 to other nodes connection implementations: H1- > H1 connection, H1- > H2 connection, H1- > H3
It is not connected to.This matrix is generated or is imported by the Web User Interface manual configuration of simulator software control system by user and configured
File generated, and it is stored in database, it is finally called by Topology g eneration module and generates artificial network topological diagram.
The present embodiment does link characteristic parameters configuration based on the TC tool of (SuSE) Linux OS, TC mainly by queue discipline,
This 3 component compositions of class, filter.As shown in figure 3, round indicate queue discipline, rectangle indicates class, and filter is according to voluntarily fixed
The filtering rule (such as source, destination IP to) of justice is divided into data packet different classes.A class expression one is virtual in the present invention
Link, link property have directionality, the number of virtual link is determined by specific network topology as Connectivity
Fixed, a simulation node may have multiple virtual links.The agreement of emulation is different, and the method for determination of virtual link may not
Together；Herein, we are with the source of direct-link node, purpose IP address in emulation topology to determining virtual link.
The solution of two kinds of virtual links configuration is provided in the present embodiment:
Scheme one configures virtual link parameter using queue discipline priority-based (Priority, PRIO).Due to
PRIO priority number is limited, and maximum is classified as 10 grades or so, therefore this scheme is only adapted to that artificial network topology is fairly simple, net
In the case of the corresponding virtual link number of each physical port of network simulator little (being no more than 10).The link property of this scheme
Parameter configuration structure is classified as shown in figure 3, establishing 10 PRIO using TC tool first, and token is then used in each classification
Bucket (Tocken Bucket Filter, TBF) queue discipline and network analog (Network Emulation, Netem) queue are advised
It is fixed, since Netem cannot connect other queues again, so placing it in the last of each classification.TBF queue discipline is used to configure void
The bandwidth (rate) of quasi- link, Netem queue discipline are used to the parameters such as time delay, the bit error rate of configuration link.Each classification is by source
It is determined with destination IP, represents a virtual link, it is in PRIO in use, we divide data packet using filter
Class, the function of not classified using PRIO according to packet priority field.Because TC tool can only control port outlet stream
Flow characteristic, so when configuring virtual link in network simulator, it should which link parameter is configured at the corresponding net of destination host
At network simulator physical port.Therefore, the virtual link of direct-link node different directions should be configured in simulator in network topology
Different port.
Scheme two is configured empty using token bucket (Hierarchical Token Bucket, the HTB) queue discipline of layering
Quasi- link characteristic parameters.HTB queue discipline is limited unlike PRIO queue discipline classification number by priority number, as long as being theoretically
Uniting, memory is sufficiently large, and HTB can add countless multiple classification, therefore it is able to satisfy in complex topology the demand more than virtual link.
The structure chart of virtual link characterisitic parameter configuration is carried out as shown in figure 4, built-in TBF queue discipline in each HTB class using HTB,
Therefore in Fig. 4, each HTB classification adds circle to indicate with a rectangle；Speed limiting function built in HTB queue discipline, so
A Netem queue discipline, which need to be only added, after each HTB classification carries out the configuration of virtual link other parameters.Scheme two other
Situation is identical as scheme one.
Fig. 5 is hardware based network (WSN) emulation system overall construction drawing, and the present embodiment is using control link and emulation link
Isolated thought, each simulation node have both links: one is control link, for researcher or runs on network simulator
On simulation node management software to simulation node configuration, monitoring and management, control link can to node carry out node dormancy,
The basic control such as shutdown；One is emulation link, the experiment simulation for network protocol.In Fig. 4, the dotted line of no arrow is control
Link processed connects interchanger and simulation node；Solid line with four-headed arrow and dotted line are emulation link, connect network analog
Device and simulation node.By controlling link, researcher can be used remote terminal to any one simulation node and net in platform
Network simulator is controlled.As shown in figure 5, being designated as H0-H4:H0 has 10 for selection has 5 common computers in the present embodiment
A ether port eth0-eth9, as network simulator, Fig. 5 shows the connection of its port eth0 to eth4, other termination
Mouth connection is omitted.H1-H4 is emulation computer, is respectively virtually 6,5,6,4 virtual sections by it according to configuration height
Point, each dummy node run linux system, and to save device resource, system operates in command mode.
Network File System (Network File System, NFS) server is installed on network simulator computer,
Then simulation system ease for operation is improved to simulation node by control link shared file.Simulation node and network simulator
The control port of computer connects internet, facilitates installation and downloading software, convenient for researcher's telnet management node.It is imitative
The emulated port of true node saves the work of configuration routing table using the IP address of the corresponding port of network simulator as gateway.Net
Network simulator computer is equipped with Apache, PHP, MYSQL server, for supporting the operation of the programs such as Web User Interface.
As shown in fig. 6, being complex simulation network topological diagram, wherein there are 18 simulation nodes, Fig. 5 institute is used in the present embodiment
The hardware based network (WSN) emulation system shown is emulated, each simulation node title in the serial number of 18 nodes and Fig. 5 in Fig. 6
Numerical portion is corresponding, such as corresponding No. 1 node of H1, corresponding No. 18 nodes of V18.According to topological diagram, our available network analogs
The number of the corresponding analog link of each physical port of device.For example, the port eth1 of network analog is corresponding imitative in Fig. 5
True node has H1, and V5-V9 six, the node number for corresponding to Fig. 6 is 1,5-9；In Fig. 6, purpose is the virtual of node 1 or 5-9
Link has 4,5,7,2,1,1 respectively, is added to obtain the corresponding virtual link item number 20 of network simulator port eth1, is greater than 10,
Therefore its configuration for needing the progress virtual link characterisitic parameter of operational version two.Using same method, our available nets
The number of the corresponding virtual link in other ports of network simulator.Before system operation, we pass through link configuration module analysis net
Network topological matrix and link parameter information carry out automatic configuration link characteristic.
As shown in fig. 7, being simulation system software architecture diagram, software agent part is operated on network simulator, only
" node administration client " operates in each simulation node, is used for management node, collector node artificial intelligence.Simulation system software
Main part include WEB user interface, general module, Topology g eneration module, link configuration module, Topology Discovery module, section
Point control module, node administration server end and database.Entire software uses MVC frame, and the full name of MVC is Model View
Controller is the abbreviation of model (model)-view (view)-controller (controller), a kind of software design allusion quotation
A kind of model, the method tissue code separated with service logic, data, interface display, service logic is gathered in a component
Face does not need to rewrite service logic while improvement and personalized customization interface and user's interaction.General module is responsible for
The interaction of bottom module and upper layer module is completed at the same time the operation to database, as data be inserted into modify when format check, insert
The operation such as enter, modify, deleting data.Another task can also be performed in general module in the present invention: being exactly according to database
Record complete simulation system and restart the configurations etc. of post-simulation network topology and link characteristic parameters to resume work.Topology g eneration mould
The connectivity of link in the Connectivity matrix configuration network simulator that block passes through user configuration generates artificial network topology
Figure.Link configuration module configures each of the links delay, shake, the bit error rate, data according to configuration information of the user to link property
It resets and the link properties such as duplication.Node administration server end collects artificial network topology information, topology hair by control link
The artificial network topology information of existing module periodically invoked node administration module server end mobile phone, Topology Discovery module will be current
Profile information in artificial network is come out by WEB interface real-time display, and simulation status is observed in simulation process for researcher,
Judgement system is whether normal operation etc..Node control module is responsible for the addition, modification, delete operation of simulation node, passes through simultaneously
User interface interaction, which is realized, operates the booting of virtual emulation node, suspend mode, shutdown, forced shutdown, abnormality processing etc..In addition, section
Point management module server end is also responsible for collecting each node experiment delivered by node administration module client by control link
Data, convenient for researcher to the statistical analysis of experimental result.
It is as follows using hardware based network (WSN) emulation system simulation process:
Step 1, IP address is configured.According to each emulated port of emulation purpose configuration simulation node and network simulator.
A kind of allocation plan reference for allowing simulation node to be in all-pass state between any two is as follows: the 1. each emulation of Configuration network simulator
The IP address of port, different emulated port IP address network numbers are different, do not configure to its gateway with DNS；2. according to network mould
The number of the quasi- corresponding simulation node of device physical port configures corresponding virtual port, such as network simulator port eth1 in Fig. 5
Corresponding 5 virtual emulation nodes, it is therefore desirable to configure 5 virtual ports, and each virtual port IP address network number is different；
3. configuring the IP address of the emulated port of simulation node, the coupled network of each simulation node emulated port IP address network number
The network number of simulator emulated port IP address is identical, and gateway is that (including it is virtual for the IP address of corresponding network simulator port
The IP address of port), the DNS of simulation node emulated port is not configured.
Step 2, register node information.Simulation node information, including emulation section are added in network simulator software systems
It calls the roll, be subordinate to simulation node name, control port IP address, analog port IP address, if virtual emulation node, simulation node name
It is identical as corresponding virtual machine name parallel.Nodal information is saved in the database by general module.
Step 3, topological diagram is generated.According to emulation topology in user interface drawing topological graph or addition Connectivity item
Mesh, then general module generates topological matrix, saves in the database.General module is generated according to topological matrix simultaneously needs to match
The virtual link entry set, is shown in user interface, is convenient for user configuration virtual link.
Step 4, virtual link is configured.The virtual link entry that above-mentioned steps generate is configured, is arrived by general module storage
Database.
Step 5, topology and link property are generated.After all link entries, which configure, to be completed, general module calls topology
Generation module and link characteristic parameters configuration module generate experiment simulation environment.In addition, periodically becoming to meet some topologys
The emulation demand (such as satellite simulation experiment) of the experiment scene of change, simulation softward system also provide topological diagram and link property dynamic
The function of variation, system can be imported by file or directly be manually imported by user the topological diagram at emulation experiment each moment with
Link property, general module are periodically detected the file information, if topological diagram or link property change, carry out dynamic and match
It sets.
Step 6, simulated program is opened.Using node control module or remote terminal control simulation node in network protocol or
Business procedure operation.Topology Discovery module detects topology information simultaneously, and real-time display is in user interface.
Step 5, experimental data is collected.In experimentation, node administration module (including server end and client) is collected
Experimental data；After experiment, the experimental data that researcher's analysis system is collected obtains experiment conclusion.
By above step, can be realized lead to too small amount of common computer carry out it is fairly large, topology flexibly variation
, the network experiment that link property can match.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (9)
1. a kind of hardware based network (WSN) emulation system, which is characterized in that the system includes
One network analog unit, the simulation node connectivity matrix based on user configuration generate artificial network topological diagram, and right
Emulation link characteristic parameters are configured；
Multiple simulation nodes carry out network protocol or industry based on the link characteristic parameters of the artificial network topological diagram and configuration
The emulation experiment for program of being engaged in；
Use the topological diagram and chain at method configuration artificial network each moment that predetermined file importing or user interface directly input
Road characteristic；
System, which is periodically detected, obtains artificial network topological diagram or the situation of change of link property different moments；
Dynamic configuration is carried out to emulation link according to the topological diagram of acquisition or link property situation of change.
2. network (WSN) emulation system according to claim 1, which is characterized in that the network analog unit includes
Topology g eneration module generates artificial network topological diagram according to the Connectivity matrix；
Link configuration module emulates demand according to user and carries out parameter configuration to link；
Node control module is controlled substantially based on simulation node in control link pair network.
3. network (WSN) emulation system according to claim 2, which is characterized in that the network analog unit includes
Node administration server obtains the topology information of simulation node and simulation node in artificial network by link in real time and tests
Data, and node control information is sent to simulation node；
Topology Discovery module for periodically transferring simulation node topology information from node administration server, and passes through
User interface real-time display.
4. according to claim 1 to network (WSN) emulation system described in 3 any one, which is characterized in that the network analog unit
Including
Database, for storing the topological diagram information and link configuration information of user configuration；
General module, for establishing the information exchange of network analog unit and user, based on user instruction to the number in database
According to the format check of progress, insertion, modification and delete operation.
5. network (WSN) emulation system according to claim 3, which is characterized in that the simulation node includes node administration client
End, for the section that the experimental data of current simulation node is collected management and is issued based on the node administration server
Point control information controls simulation node.
6. network (WSN) emulation system according to claim 5, which is characterized in that the simulation node includes
The control port connecting with the interchanger of remote terminal is used to form control link, realizes long-range management and configuration；
The analog port connecting with network analog unit is used to form emulation link, executes emulation experiment.
7. a kind of emulation mode based on network (WSN) emulation system described in claim 1, which is characterized in that the step of this method includes
The IP address of each emulated port of user configuration simulation node and network analog unit, and it is right in network analog unit
Simulation node information is registered；
Connectivity matrix based on user configuration generates artificial network topological diagram, and matches to emulation link characteristic parameters
It sets；
Simulation node carries out emulation in fact using the artificial network topological diagram and emulation link characteristic parameters as experiment simulation environment
It tests；
Experimental data is collected, obtains the simulation experiment result through analysis；
Use the topological diagram and chain at method configuration artificial network each moment that predetermined file importing or user interface directly input
Road characteristic；
System, which is periodically detected, obtains artificial network topological diagram or the situation of change of link property different moments；
Dynamic configuration is carried out to emulation link according to the topological diagram of acquisition or link property situation of change.
8. emulation mode according to claim 7, which is characterized in that the configuration step of the simulation node includes
According to the IP address information of the emulation each emulated port of demand Configuration network simulator, it such as can configure different emulated port IP
Address network difference does not configure its gateway with DNS；
Corresponding virtual port, configuration method root are configured according to the number of the corresponding simulation node of network analog unit physical port
Depending on demand, it is different such as to can configure each virtual port IP address network number；
The IP address of the emulated port of simulation node is configured, configuration method is because such as can configure each simulation node emulation end depending on demand
The network number of the coupled network simulator emulated port IP address of mouth IP address network number is identical, and gateway is corresponding network mould
The IP address of quasi-simple member port, while the IP address including its virtual port, do not configure the DNS of simulation node emulated port.
9. emulation mode according to claim 7, which is characterized in that the step of this method further comprises will adjustment every time
Artificial network topological diagram, simulation node connectivity and emulation link characteristic parameters deposit database in, be used for simulation system weight
It opens post-simulation network topology and emulates the configuration and recovery of link characteristic parameters.
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| CN105357039B (en) * | 2015-10-27 | 2019-01-18 | 中国船舶重工集团公司第七二二研究所 | A kind of emulation mode and device of time delay tolerant network |
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