CN105915304A - System-level simulation demonstration verification method facing satellite mobile communication - Google Patents

System-level simulation demonstration verification method facing satellite mobile communication Download PDF

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Publication number
CN105915304A
CN105915304A CN201610378531.3A CN201610378531A CN105915304A CN 105915304 A CN105915304 A CN 105915304A CN 201610378531 A CN201610378531 A CN 201610378531A CN 105915304 A CN105915304 A CN 105915304A
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satellite
mobile communication
simulation
link
satellite mobile
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CN105915304B (en
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吕刚明
王晓杰
任品毅
李雄飞
楼大年
孙垂强
李国兵
杜清河
朱浩
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Xian Jiaotong University
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Xian Jiaotong University
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B17/00Monitoring; Testing
    • H04B17/30Monitoring; Testing of propagation channels
    • H04B17/391Modelling the propagation channel
    • H04B17/3912Simulation models
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/06Testing, supervising or monitoring using simulated traffic

Abstract

The invention provides a system-level simulation demonstration verification method facing satellite mobile communication. A simulation scene is configured, wireless transmission simulation and protocol transmission simulation of satellite mobile communication are created and completed, the communication performance of a single link and the global system is obtained by means of statistics, and the assessment on satellite mobile communication design and satellite communication key technologies is completed. The required node models, channel models and protocol models are created by the storage of model data, and simulation models are further formed, so that the simulation process is good in expandability and repeatability, complex simulation basic models are packaged, data and positions are changed according to requirement, the establishment of the simulation models is simpler, and the universal adaptation is improved; in addition, simulation is carried out according to the successive networks, links and protocols, and different satellite protocols, different satellite network topologies, different satellite system configurations and different satellite communication-related technologies are simulated, so that the assessment related to satellite communication system design and satellite communication technologies is realized.

Description

A kind of system integration project demonstration and verification method towards satellite mobile communication
Technical field
The present invention relates to satellite mobile communication emulation field, a kind of towards satellite mobile communication be Irrespective of size simulation demo verification method.
Background technology
In the last few years, along with the progress of satellite technology, satellite mobile communication was in national defense construction, economic development And the aspect such as social life all plays the most important effect.When communication technology of satellite is faced with high Prolong, high decline etc. has a different and GCS Ground Communication System communication difficult problem, simultaneously compared to ground system, satellite Communication system cost is high, structure complexity, and is difficult to transformation.
Similar with GCS Ground Communication System, the development of communication technology of satellite also be unable to do without propping up of simulation test platform Support, system-level simulating, verifying can quickly, low cost assess system schema and the performance of algorithm, On quantitative analysis star, payload algorithm and framework improve the impact on system-wide performance, thus reduce wind Danger, it is to avoid just bury problem and risk in design level, will become the future meeting payload design and development Gesture.Meanwhile, demonstrated the transmission performance of satellite-ground link intuitively by simulation software, business provides ability Deng, thus the advance of the vivider scheme of display technique intuitively.
Current more popular following four sections of network simulators are as follows:
1.NS2:NS2 (Network Simulator version 2) network simulator is a kind of OO Network simulator.NS2 software is furnished with simulation process dynamic watcher, can terminate in simulation run After, dynamically watch the running of emulation, observe the data followed the tracks of.NS2 is powerful, extensibility By force, execution efficiency is high, is widely used to LAN, wide area network, wireless mobile network and satellite network Emulation.
2.OMNeT++:OMNeT++ is a kind of Discrete Event Simulator, possesses in insertion type emulation Core and powerful graphical interfaces interface, can run on multiple operating system platform, possesses programming, debugging and with The functions such as track support also support parallel-distributed processing.
3.DTNsim:DTNsim is the discrete event simulator write with Java language, uses Simulate in DTN (Distributed Transient Network, the transient network of distribution) Transmission or Message storage during failure forwards.DTNsim also supports the burst transmission of message.If a message passes Encounter connection closed during sending, and had the success of message burst to be received by node, then this node will The arrival of remaining message burst can be waited.
4.ONE:ONE is applicable to Routing Protocol and the simulation of applied research analysis of DTN network environment Device, has discrete event control system, object-oriented and the feature of simulation real network environment.ONE will move Movable model, DTN route and visual graphical interfaces integrate, and are very easy to be extended, And substantial amounts of analysis model and result report can be provided.
Although there are the most outstanding simulation performance in these four sections of simulation softwares, but move logical at emulation satellite During letter scheme, there is the shortcoming that cannot go beyond: NS2 and lack DTN network environment is well propped up Hold.Meanwhile, when NS2 carries out multinode emulation, it is impossible to enough transmitting real data, this causes entering The transmission of row truthful data.OMNET++ needs user oneself to realize specific function.DTNsim is special Door is the simulator of DTN Environment Design.But, it simply merely pays close attention to the imitative of route Very.Meanwhile, when multinode emulates, it is impossible to carry out the transmission of truthful data.ONE network simulator Only achieve the BP part of DTN agreement, when carrying out multinode emulation, simply transmit virtual data (information of data message), can not realize truthful data transmission and can not embody data flow.
In sum, DTN network environment is well propped up by NS2 and OMNET++ network simulator shortage Hold, need user specifically to develop.Although and DTNsim and ONE network simulator be exclusively for The simulator of DTN Environment Design, but there is respective defect.And emulate at multinode Time, it all can only simulate virtual data transmission, it is impossible to carries out truthful data transmission, it is impossible to meets satellite and moves The requirement of dynamic communication simulation.
Summary of the invention
For problems of the prior art, the present invention provides a kind of system towards satellite mobile communication Level simulation demo verification method, is configured by simulating scenes, creates and complete the wireless of satellite mobile communication Propagation Simulation and protocol transmission emulation, statistics obtains single link and the communication performance of the system overall situation, thus Complete satellite mobile communication system design and the assessment of satellite communication key technology.
The present invention is to be achieved through the following technical solutions:
A kind of system integration project demonstration and verification method towards satellite mobile communication, comprises the steps,
Step 1, the step of model creation, according to the demand of the system integration project of satellite mobile communication, complete Become the establishment of satellite mobile communication phantom;Described satellite mobile communication phantom includes supporting to expand The phantom opened up and the phantom not supporting extension, support that the phantom of extension includes that satellite moves Communication node phantom and satellite communication channel phantom;
Step 2, the step of network creation, according to satellite mobile communication node phantom, create required The satellite mobile communication node of quantity, and revise the configuration parameter of satellite mobile communication node;According to emulation The demand amendment satellite mobile communication node position in artificial network topology of network topology;Joined by determining The satellite mobile communication node putting parameter and position builds the artificial network topology obtaining correspondence;
Step 3, the step of network simulation, artificial network topology is carried out service condition renewal and position more Newly, several new service request and handover request are obtained;By the nothing to service request and handover request Line resource management obtains satellite mobile communication link, and stores all nodes of respective links in units of link Business information, positional information and wireless resource information;
Step 4, the step of link simulation, all satellite mobile communication links are carried out link calculation successively With link level to system-level mapping, obtain carrier-to-noise ratio corresponding to each link, physical layer time delay and physics Layer Packet Error Ratio;The carrier-to-noise ratio of respective links, physical layer time delay and physical layer bag by mistake is stored in units of link Rate;
Step 5, the step of protocol emulation, the physical layer time delay corresponding according to each link and physical layer Packet Error Ratio carries out protocol emulation successively to all links, obtains cutting off rate corresponding to each link, Internet Packet loss, Internet Packet Error Ratio and Internet time delay;The Internet of respective links is stored in units of link Packet loss, Internet Packet Error Ratio and Internet time delay;
Step 6, performs step 3 to 5 with protocol frame as step-length circulation in the simulation time set, complete In pairs towards the system integration project demonstration and verification of satellite mobile communication.
Preferably, also include the artificial intelligence of storage in units of link is saved as figure or file shape Formula, and the step shown;Described artificial intelligence includes the business information of all nodes of respective links, position Confidence breath and wireless resource information, carrier-to-noise ratio, physical layer time delay and physical layer Packet Error Ratio, and Internet Packet loss, Internet Packet Error Ratio and Internet time delay.
Preferably, when step 1 creates phantom, use object oriented designing, build and include defending Star communication node module, the satellite mobile communication of satellite communication channel module and satellite communication protocols module is imitated True basic module;Satellite mobile communication Math module is carried out model specialization storage and obtains phantom Database data, is stored in phantom library module, according to the need of the system integration project of satellite mobile communication Asking, the simulation model library data creation choosing correspondence obtains satellite mobile communication phantom.
Preferably, in step 3, RRM includes route querying, and call admission is adjudicated, wireless Resource distribution and handover management.
Compared with prior art, the present invention has a following useful technique effect:
The method of the invention is by nodal analysis method, channel model and the association needed for storage model data establishment View model forms phantom so that simulation process has excellent extensibility and repeatability, and by numerous Miscellaneous Math model encapsulation, revises its data and position as required so that the foundation of phantom More simple and clear, improve its universality adapted to;Imitated by the network carried out successively, link and agreement Very, it is achieved emulate different satellite protocol, different satellite network satellite system topological, different configures, no Same satellite communication correlation technique, thus realize Satellite Communication System Design, the phase of communication technology of satellite Close assessment.
Further, by the artificial intelligence of storage in units of link is saved as figure or file shape Formula, and show, preferably provide the user and accessed and the entrance of operation, it is possible to managed emulation easily Model library, configuration simulating scenes, control simulation process, tracking simulation parameter are followed the tracks of, are shown that emulation is tied Really, simulating scenes is shown so that emulation platform has good interactivity.
Further, phantom is obtained by satellite mobile communication Math modular model specialization storage Database data, provides operation to support for self-defined phantom, it is possible to preferably create the satellite needed for user Mobile communication scene.
Accompanying drawing explanation
When Fig. 1 is that described in present example, method implements, the system integration project of satellite mobile communication is drilled Show the structure chart of checking system.
Satellite mobile communication emulation platform mutual boundary when Fig. 2 is that described in present example, method implements Face module diagram.
Fig. 3 is the overall simulation flow of method described in present example.
Satellite mobile communication emulation platform emulation mould when Fig. 4 is that described in present example, method implements Type storehouse pie graph.
The artificial intelligence schematic diagram of graphic form when method implements described in Fig. 5 present example.
Method described in Fig. 6 present example realizes the end-to-end simulation contact surface of satellite mobile communication.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, described in be to the present invention Explanation rather than restriction.
A kind of system integration project demonstration and verification method towards satellite mobile communication of the present invention, including as follows Step,
The first step, according to the demand of the system integration project demonstration and verification of satellite mobile communication, completes satellite The establishment of mobile communication phantom, satellite mobile communication node is imitated to support the phantom of extension to include True mode, satellite communication channel phantom.Wherein satellite communication nodal analysis method includes satellite repeater Model, antenna model, terminal model, earth station's model and dummy satellite;Satellite communication channel is imitated True mode includes that large scale fading model and multipath fading model, large scale decline module include that cloud and mist declines Subtract model, Rain fade modes, atmospheric attenuation model, tropospheric attenuation model.
Second step, calls the simulation node model created in the first step, the emulation net needed for establishment Network topology;By calling the simulated channel model created in the first step, determine the letter of analogue system Road environment;And configure simulation parameter, need the simulation parameter of configuration to include: to emulate the time started, imitate True statistical interval, emulation duration;Connect by the satellite mobile communication core algorithm of amendment designated module Mouthful, self-defined satellite communication core algorithm.By above four aspects, create complete satellite and move Communication simulation scene.
3rd step, emulation carries out being divided into four steps: during simulation run, to the emulation net created Network carries out network renewal, updates the position of all nodes, service condition, terminal in network renewal process Node and ground juncture station node can initiating business requests;With post analysis service request, carry out routeing, Call admission, if call admission allows, then carries out resource distribution, switching judging and process, establishment Communication link, if call admission is rejected, then points out user, and shows related causes;Communication chain After road creates, the communication node parameter needed for link calculation and mapping block extraction, channel parameter, enter The calculating of uplink transmission process, obtains the carrier-to-noise ratio of current ink, then uses mapping model to carry Make an uproar than the Packet Error Ratio becoming physical layer packet;After mapping completes, protocol emulation module utilizes physical layer The Packet Error Ratio of bag and the mode of generation random number, adjudicate the transmission of this physical layer packet the most correctly, and with This maps to MAC layer, rlc layer, PDCP layer, obtains the performance statistics of this link transmission.Imitative True process, before service ending or emulation terminate, constantly carries out business renewal according to above-mentioned flow process, The distribution of route, call admission, resource, handover management, then carry out link calculation and mapping, finally Carry out protocol transmission emulation and statistics.Emulation time-out is to emulate to suspend emulation after this emulation terminates, When emulation terminates, emulate and terminate after this emulation terminates, and remove whole analogue system.
During simulating scenes configuration and simulation run, user can check emulation field at any time The composition of scape, and check link parameter and the node parameter of current time.Link parameter includes each bar chain The link number on road, initiation node, receiving node, middle collection node, type of service, residual time length, Node parameter includes the numbering of each node, node type, positional information, business information, is used Antenna model.
After terminating with emulation during simulation run, support that user is with curve chart or the shape of block diagram Formula checks the emulation statistical information of given link or the overall situation, supports that user is by cache file simultaneously Form checks simulation result.
Wherein, the establishment of phantom, satellite mobile communication topological network are completed by simulation interactive interface Network and the establishment of channel circumstance, define satellite mobile communication technology core by the way of amendment specified interface Center algorithm.Self-defining satellite communication core algorithm interface can be carried out include: routing algorithm interface, Call admission algorithm interface, resource allocation algorithm interface, handoff algorithms interface, link circuit self-adapting algorithm Interface, adaptive coding algorithm interface, speed matching algorithm interface.Simulation result is different according to type It is divided into and is wirelessly transferred statistical result, protocol transmission statistical result.Wherein it is wirelessly transferred statistical result bag Include: carrier-to-noise ratio, link between total carrier-to-noise ratio of link, link overall delay, each node of link respectively save Under time delay between point, interference size, multipath fading are big;Protocol transmission statistical result includes: network Layer handling capacity, MAC layer handling capacity, bag due in, arrival bag size, bag propagation delay time, by mistake bag Rate, cutting off rate.
The present invention system-level realization of system integration project demonstration and verification by satellite mobile communication, comprises imitative True basic module, phantom library module, copying realize module, collection of network management module and Five layer architectures that simulation interactive interface module is constituted.Concrete simulation process includes that satellite mobile communication is imitated True mode establishment, the establishment of satellite mobile communication simulating scenes, satellite mobile communication simulation run, emulation Five parts are checked in platform scene display and parameter tracking, emulation statistical result, and its system have employed five Layer realizes framework and object oriented designing, has excellent extensibility and operability easily, Specific implementation is as follows.
Use object oriented designing, build satellite mobile communication Math module.Satellite moves logical Letter Math module is divided into three major types: satellite communication node module, including satellite repeater module, sky Wire module, terminal module, ground station module and satellite mould;Satellite communication channel module, including big Yardstick decline module and multipath fading module, large scale decline module includes that cloud and mist attenuation module, rain decline Module, atmospheric attenuation module, tropospheric attenuation module and multipath module;Satellite communication protocols module, Comprise the protocol package mould of PDCP layer, rlc layer, MAC layer, PHY layer protocol module and correspondence Block.
On the basis of Math module, build simulation model library.Model library is by all types of bases Module carries out specialization storage, and sets up the access of correspondence, additions and deletions, editor, offline storage interface, uses Family realizes the access to simulation model library and management by above-mentioned interface.Simulation model library support extension Satellite communication nodal analysis method includes satellite repeater model, antenna model, terminal model, earth station's mould Type and dummy satellite;The satellite communication channel phantom of simulation model library support extension includes big chi Degree fading model and multipath fading model, large scale decline module includes that cloud and mist attenuation model, rain decline mould Type, atmospheric attenuation model, tropospheric attenuation model.
Three copying modules are built, including network topology management mould on the basis of simulation model library Block, link calculation and mapping block and protocol emulation module, modularly realize simulation process.Network Topology Management module is responsible for realizing network node and the management of channel model, determines satellite modules, pass Mouthful station module and the quantity of terminal module, type, position and service condition, and determine and currently emulate field The channel model used under scape;Link calculation and mapping block are carried by network topology management module The interface of confession, obtains the link information required for link calculation, completes link calculation and returns carrier-to-noise ratio, And complete link level to system-level mapping, the mistake of this emulation moment physical layer is determined by carrier-to-noise ratio Bag rate;Protocol emulation module is responsible for emulating the function of satellite mobile communication agreement, by link calculation and reflect Penetrating the physical layer Packet Error Ratio obtained, map to agreement upper strata, the agreement finally counting each layer protocol passes Defeated performance parameter also stores, and the satellite communication core technology that simulation protocol transmission simultaneously is relevant, including chain Road adaptive algorithm, adaptive coding algorithm, speed matching algorithm.
Three copyings are realized module and have combined by the way of combination by collection of network management module Coming, it is achieved emulation overall process, and realize the collection to simulation result, analyze and process, satellite moves Communication routing algorithm, call admission algorithm, resource allocation algorithm, handover management algorithm are also at this mould Block realizes by the way of interface.Collection of network management module realizes three nucleus modules and emulation The Reseal of model library module interface, provides emulation for simulation interactive module and controls other modules Interface.
Simulation interactive module call collection of network management relevant interface, it is achieved simulation model library show with Manage, control simulation process, configuration simulating scenes, tracking simulation parameter, simulation performance displaying, imitate True six functions of scene display.
Wherein, platform preferably can use C++ code to realize, and link calculation module is according to international electricity Letter federation protocol is write, and Math module uses Qt to write and forms.
Under above-mentioned emulation platform framework, the simulation flow of method described in this preferred embodiment is as follows.
(1) phantom creates: user judges whether to need to create new phantom, the need to Then utilize the model database management function of interactive interface, carry out the extension of phantom;If it is not needed, The most directly carry out simulating scenes configuration.
(2) simulating scenes creates: user uses the simulating scenes configuration feature of interactive interface to arrange emulation Parameter, configuration artificial network topology, channel model and protocol parameter are set.And according to simulating scenes, The amendment routing algorithm of bottom, call admission algorithm, resource allocation algorithm, handover management algorithm are corresponding Interface, complete the establishment of simulating scenes.
(3) simulation run and control: after simulating scenes is set up, user passes through simulation interactive module control Making the beginning of emulation, suspend and terminate, the operation of analogue system is managed module coordination three by collection of network Individual copying realizes module and completes.During simulation run, network topology management module is to having created Artificial network carries out network renewal, updates the position of all nodes, service condition, network renewal process Middle terminal node and ground juncture station node can initiating business requests;Network topology management module is divided subsequently Analysis service request, carries out routeing, call admission, if call admission allows, then carries out resource and divides Join, switching judging and process, establishment communication link, if call admission is rejected, then by emulation Interface prompt user, and show related causes;After communication link creation, link calculation and mapping block From network topology management module, extract required communication node parameter, channel parameter, carry out link biography The calculating of defeated process, obtains the carrier-to-noise ratio of current ink, then uses mapping model carrier-to-noise ratio to be mapped Become the Packet Error Ratio of physical layer packet;After mapping completes, protocol emulation module utilizes the mistake bag of physical layer packet Rate and the mode of generation random number, adjudicate the transmission of this physical layer packet the most correctly, and with this to MAC Layer, rlc layer, PDCP layer map, and obtain the performance statistics of this link transmission.Simulation process exists Before service ending or emulation terminate, constantly carry out business renewal according to above-mentioned flow process, route, exhale It is the distribution of access, resource, handover management, then carries out link calculation and mapping, finally carry out agreement Propagation Simulation and statistics, emulation time-out is, emulates and suspends emulation after this emulation terminates, and emulation is eventually Time only, analogue system terminates emulation after this emulation terminates, and removes whole analogue system.Emulation Statistical result is divided into according to type difference and is wirelessly transferred statistical result, protocol transmission statistical result, wherein It is wirelessly transferred statistical result to include: between total carrier-to-noise ratio of link, link overall delay, each node of link Carrier-to-noise ratio, the time delay between each node of link, interference size, multipath fading big under;Protocol transmission Statistical result includes: Internet handling capacity, MAC layer handling capacity, bag due in, arrival bag are big Little, bag propagation delay time, Packet Error Ratio, cutting off rate.
(4) simulating scenes is shown and parameter tracking: during simulating scenes configuration and simulation run, User can be transferred through the scene display window at simulation interactive interface at any time and checks the structure of simulating scenes Become, and link parameter and the node ginseng of current time checked by the parameter tracking window at logical simulation interactive interface Number.Link parameter includes the link number of each bar link, initiates node, receiving node, middle collection joint Point, type of service, residual time length, node parameter includes the numbering of each node, node type, position Information, business information, the antenna model that used.
(5), after terminating with emulation during simulation run, support user by Simulation Interface with curve The form of figure or block diagram checks the emulation statistical information of given link or the overall situation, supports to use simultaneously Simulation result is checked by the form of cache file in family.
When the method for the invention implements, the system integration project demonstration and verification system of satellite mobile communication Being monolithically fabricated as it is shown in figure 1, preferably whole system all uses C++ to realize of system.Interactive interface mould Block is as in figure 2 it is shown, use Qt to realize.
The simulation process of the method for the invention is as it is shown on figure 3, user is it is first determined whether create new mould Type, creates new phantom if necessary;Model preparation is complete, user use interactive interface and Amendment bottom module two ways, configures oneself required simulating scenes, and arranges simulation parameter;With After emulate, the artificial network that is divided into of simulation process updates, including route, call admission, resource Distribution and the RRM of handover management, link transmission emulation and simulation result add up four step structures Become;System determination whether service ending or emulation subsequently terminates, if emulation continues, repeats above Process.Concrete link transmission simulation process as shown in Figure 6, in single simulation process, link meter Calculate module from network topology management module, obtain link calculation desired parameters, be calculated carrier-to-noise ratio, Time delay, utilizes carrier-to-noise ratio to carry out link level to system-level mapping, gets the mistake bag of current ink Rate;Protocol emulation module utilizes calculated Packet Error Ratio subsequently, maps to upper strata, it is thus achieved that MAC The performance statistics such as layer, rlc layer, the Packet Error Ratio of PDCP layer, handling capacity.
Use object oriented designing, build the Math class of satellite mobile communication.Math class It is divided into three major types: satellite communication node class, including satellite repeater class, antenna class, terminal class, ground Class of standing and satellite class;Satellite communication channel class, including large scale decline class and multipath fading class, its Middle large scale decline class include cloud and mist decay class, rain decline class, atmospheric attenuation class, tropospheric attenuation class, Multipath class etc.;Satellite communication protocols class, comprises PDCP layer, rlc layer, MAC layer, PHY layer The protocol package class of protocol class and correspondence.
Simulation model library class, as shown in Figure 4 phantom is built on the basis of above-mentioned Math class Storehouse is made up of model memory module and model library interface.Write simulation model library memory module, by being wanted The satellite communication phantom of extension creates storage queue, and writes corresponding queue search method, mould Type access method;Followed by above-mentioned interface, compile for each satellite communication phantom to be extended Write and increase model, case-deleted models interface accordingly, and emulate mould for each satellite communication to be extended The offline storage interface of correspondence write by type.The effect of offline storage interface is when user creates phantom Time, specific bit be set to phantom generate file backup, when model be deleted be that it is right also to delete The file backup answered.When simulation model library system reboot, model library reads file backup, so that Obtain user-defined phantom can not lose by off-line.Call the emulation that simulation model library is provided Foundation class, builds three emulation core classes, including network topology management class, chain by the way of combination Road calculates and mapping class and protocol emulation class.Network topology management class is responsible for realizing network node and letter The management of road model, determines quantity and the position of simulating scenes Satellite, juncture station and terminal, and really The channel model used under settled front simulating scenes;Link calculation and mapping class are by network topology pipe The interface that reason class is provided, obtains the information required for link calculation, completes link calculation return load and makes an uproar Than, time delay, and complete link level to system-level mapping, determine this emulation moment by carrier-to-noise ratio The transmission of physical layer packet is corrected errors;Protocol emulation class realizes the emulation of protocol transmission process, and realizes adaptive Should encode, the protocol-dependent satellite mobile communication core technology interface such as rate-matched, be responsible for system simultaneously Count out related protocol transmission performance parameter and store.Particular content is as described below:
A) the satellite repeater model definition new model by following parameter: saturation flux density;Equivalence Noise temperature;Input/output rollback;Saturation output power;Mode of operation (transparent forwarding, nontransparent Forward).
B) antenna model is by following parameter definition new model: maximum gain;Directional diagram, directional diagram is adopted Add the pattern definition of directional diagram with unified feed, input with document form;Antenna diameter;Antenna product Prime factor;Polarizing angle antenna efficiency;Antenna radiated power.
C) terminal model, earth station's model are by choosing the antenna model of correspondence, arranging quality factor in fact Existing self-defined.
D) dummy satellite by choose correspondence transponder model and antenna model define, arrange quality because of Number realizes self-defined.
E) wireless transmission model, declines including cloud and mist decay, rain, atmospheric attenuation, tropospheric attenuation, many Footpath model etc., multipath model support path number can set, by UI arrange the time delay in every footpath, decay, The parameters such as distribution, the amendment of multipath computational methods needs by amendment code.The amendment of remaining model, Need also exist for carrying out by the way of amendment code.
F) protocol transmission model, including PDCP layer model, rlc layer model, MAC layer model, PHY layer model, Service creation model and for packet and protocol package model.
Three core classes are combined by the way of combination by collection of network management class, call three classes Interface realize emulation overall process, and realize the storage to simulation result, analyze and process.At network Aggregate apoplexy due to endogenous wind, calculates for routing algorithm, call admission algorithm, resource allocation algorithm, handover management Method writes corresponding interface, and later stage user realizes different core technology calculations by revising these interfaces Method.Meanwhile, collection of network management class realizes three cores emulation classes and simulation model library class interface Reseal.
Interactive interface module support Simulation Control, model library show and management, scene configuration, parameter with Track, performance are shown, simulating scenes shows six functions.
Pass through Simulation Control, it is achieved to the beginning of simulation process, suspend, terminate and Output simulation report The control accused.
Model library is shown and management, it is possible to classification is shown different models and deletes and increase, the end Layer deletes corresponding model and offline backup file by model name.By the operations of Simulation Interface with Corresponding physical layer interface docking is got up, it is achieved interactive interface is to the displaying in underlying model storehouse and management.Logical Cross aforesaid way, can extend by implementation model easily, and realize offline backup, when system is at this During startup, the model that user creates will not be lost.
It is self-defined that scene configuration is capable of simulation parameter, transmission environment and network topology, thus Define oneself required simulating scenes.
Parameter tracking can essential information in real-time exhibition system operation, help user to understand the end The running status of layer system and the change of key parameter.Division of teaching contents according to parameter is the relevant ginseng of link Number and node relevant parameter.Can show that in current system, the basic condition of all links is with all in real time The information of node.
Performance displaying realizes the statistics to simulation result and displaying, and performance statistics realizes in bottom dependence Energy statistics system, showing of upper strata is mainly realized by the form of curve, as shown in Figure 5.In emulation The bottom of platform, system relies on performance statistics system to carry out the collection of simulation result, process and store, Emulation platform often runs a dummy spacings, the useful artificial intelligence tegillum that performance statistics system will produce Layer is collected, and pools together and is analyzed and stores.On emulation platform upper strata, it is necessary first to analyze not Same simulation result, choose suitable exhibition method, such as, simulation result classification is shown there will be contrast The curve of meaning is aggregated in the same coordinate system as far as possible, it is allowed to user sets the modes such as statistical interval, Facilitate user to be analyzed contrast, thus realize to bottom storage result integration with efficiently show.
Simulating scenes shows that the difform figure of use represents different types of node, uses different face The service condition of the other node in zone, uses the line between node to represent satellite mobile communication link.

Claims (4)

1. the system integration project demonstration and verification method towards satellite mobile communication, it is characterised in that bag Include following steps,
Step 1, according to the demand of the system integration project of satellite mobile communication, completes satellite mobile communication and imitates The establishment of true mode;Described satellite mobile communication phantom includes the phantom and not supporting extension Support the phantom of extension, support that the phantom of extension includes satellite mobile communication node phantom With satellite communication channel phantom;
Step 2, according to satellite mobile communication node phantom, the satellite creating requirement moves logical Letter node, and revise the configuration parameter of satellite mobile communication node;Demand according to artificial network topology is repaiied Change satellite mobile communication node position in artificial network topology;By determining defending of configuration parameter and position Star mobile communications nodes builds the artificial network topology obtaining correspondence;
Step 3, carries out service condition renewal and location updating to artificial network topology, obtains several new Service request and handover request;By the RRM of service request and handover request is defended Star mobile communication link, and in units of link, store the business information of all nodes of respective links, position Information and wireless resource information;
All satellite mobile communication links are carried out link calculation and link level to system-level by step 4 successively Mapping, obtain carrier-to-noise ratio corresponding to each link, physical layer time delay and physical layer Packet Error Ratio;With link For the unit storage carrier-to-noise ratio of respective links, physical layer time delay and physical layer Packet Error Ratio;
Step 5, the physical layer time delay corresponding according to each link and the Packet Error Ratio of physical layer are to all links Carry out protocol emulation successively, obtain cutting off rate corresponding to each link, Internet packet loss, Internet by mistake Bag rate and Internet time delay;The Internet packet loss of respective links, Internet is stored by mistake in units of link Bag rate and Internet time delay;
Step 6, performs step 3 to 5 with protocol frame as step-length circulation in the simulation time set, complete In pairs towards the system integration project demonstration and verification of satellite mobile communication.
A kind of system integration project demonstration and verification towards satellite mobile communication the most according to claim 1 Method, it is characterised in that also include the artificial intelligence of storage in units of link is saved as figure or literary composition Part form, and the step shown;Described artificial intelligence includes the business letter of all nodes of respective links Breath, positional information and wireless resource information, carrier-to-noise ratio, physical layer time delay and physical layer Packet Error Ratio, and Internet packet loss, Internet Packet Error Ratio and Internet time delay.
A kind of system integration project demonstration and verification towards satellite mobile communication the most according to claim 1 Method, it is characterised in that when creating phantom in step 1, uses object oriented designing, builds Including satellite communication node module, the satellite of satellite communication channel module and satellite communication protocols module moves Communication simulation basic module;Satellite mobile communication Math module is carried out model specialization storage imitated True mode database data, according to the demand of the system integration project of satellite mobile communication, chooses the emulation mould of correspondence Type database data creates and obtains satellite mobile communication phantom.
A kind of system integration project demonstration and verification towards satellite mobile communication the most according to claim 1 Method, it is characterised in that in step 3, RRM includes that route querying, call admission are sentenced Certainly, Radio Resource distribution and handover management.
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