CN100544363C - A kind of performance simulation system that is used for OPNET 1090MHz ADS-B system - Google Patents
A kind of performance simulation system that is used for OPNET 1090MHz ADS-B system Download PDFInfo
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Abstract
A kind of performance simulation system that is used for OPNET 1090MHz ADS-B system, be divided into network layer, node layer and process level, network layer is used for customizing the network context environment that is fit to whole communication system, comprises the aircraft nodal analysis method and the ground station's nodal analysis method that are arranged in node layer; The aircraft nodal analysis method is used for broadcasting ADS-B message and the secondary radar of ground tiny node model replied, and it comprises and is arranged in process level: secondary radar responder module, 1090 data source modules, aircraft node are destroyed module, 1090MHz transmitter module, 1030MHz receiver module and aircraft MAC module; Ground station's nodal analysis method is used for receiving the ADS-B broadcast and to the inquiry of aircraft nodal analysis method secondary radar, and it comprises and is arranged in process level: 1090MHz receiver module, 1030MHz transmitter module, ground station's node are destroyed module, secondary radar data source module and the MAC of ground station module.This model of the present invention is applicable in 1090MHz ADS-B system and carries out hierarchical design and modeling and simulating in OPNET, for subsequent user use and upgrading facilitates.
Description
Technical field
The present invention relates to the analogue system of a kind of 1090MHz ADS-B system,, belong to the air communications field as expansion for the original java standard library of emulation tool OPNET.
Background technology
The basic goal of air traffic control is to make aircraft safety on the course line, effective and plannedly fly in the spatial domain, and the controller need dynamically carry out real time monitoring to the flight of aircraft in the control zone.
Traditional radar surveillance means adopt interrogator-responder system to target acquisition.In the long run, radar system self has a lot of limitation, has limited the raising of monitor performance.The straightline propagation of radar beam has formed a large amount of radar shadown, can't cover areas such as ocean and desert; The radar swing circle has limited the raising of data updating rate, thereby has limited the raising that monitors precision; The situation data such as plan air route, speed of aircraft be can't obtain, the raising of tracking accuracy and the ability that short-term collision detects alarm STCA limited.Therefore, need the new supervision means of exploitation.
Automatic dependent surveillance broadcast ADS-B utilizes airborne vehicle to broadcast the precise location information that is generated by airborne satellite-based navigation and navigation system automatically, ground installation and other airborne vehicles receive this information by aeronautical data chain, and satellite system, aircraft and ground based system are realized the integrative coordinated supervision in the empty world by the high-speed data chain.ADS-B has not only overcome some problems of traditional radar surveillance means, and has advantages such as precision height, turnover rate height, applied range, ground installation construction and maintenance cost are low.
Data link is the important component part of ADS-B, and with important monitor messages such as broadcast mode transmission aircraft state, position, speed, the optional data chainning technology of ADS-B has following three kinds at present: Mode S 1090 ES, VDL MODE4 and UAT.The 1090ES data chainning of ICAO, IATA, FAA, S isotype is EUROCONTROL etc. by agreeing unanimously that decision is as the data chainning of implementing ADS-B in the recent period after research such as big quantitative analysis, demonstration and the test." 1090 " are meant that system uses 1090MHz as the downlink transfer frequency, and " ES " is extended squitter, refers to that information format is the expansion text message of Mode S, and expansion is meant that the extension of message with 56bit arrives in the bag of 112bit.It uses S pattern answering machine to send and receives ADS-B message, and the downstream frequency of S pattern answering machine (being Mode S Transponder) is 1090MHz, and the coded format of information is simple pulse position coding.
OPNET provides some master patterns about cordless communication network, comprise data link layer, network layer, Routing Protocol, transport layer protocol, physical layer, utility program, comprehensive simulating target, application layer, no line model, vendor equipment model etc., but can be directly used in the then less of ADS-B system.
As a kind of new technology, need before practical application, assess checking to its performance.And the assessment engineering cost that is used for the civil aviaton field is very high and have certain risk, and some conditions and environment that is used to assess is difficult to reach requirement, so before place assessment, need to carry out earlier analog simulation, remedy the not enough of place assessment and provide certain foundation for the place assessment.
At present, a lot of countries are all relevant for the simulation model of 1090MHzADS-B systematic function, RTCA as the U.S., just appear ADS-B TLAT (Technical Link Assessment Team) Report as far back as March calendar year 2001), but because above research all is civil aviaton's present situation and local geographical environment based on the U.S., to China civil aviaton and incompatible, and there are not to announce relevant ins and outs.And the not research of related fields at home.
Summary of the invention
Technology of the present invention is dealt with problems: overcome the deficiencies in the prior art, the performance simulation system of a kind of OPNET of being used for 1090MHzADS-B system is provided, this system is applicable in 1090MHz ADS-B system and carries out hierarchical design and modeling and simulating in OPNET, for subsequent user use and upgrading facilitates.
Technical solution of the present invention: a kind of performance simulation system that is used for OPNET 1090MHz ADS-B system is characterized in that comprising: network layer, node layer and process level, wherein:
Network layer is used for customizing the network context environment of a suitable whole communication system, and described network layer is made of network model, and described network model comprises n aircraft nodal analysis method and ground station's nodal analysis method, wherein n 〉=1 that is arranged in node layer;
Described aircraft nodal analysis method is used for broadcasting ADS-B message and the secondary radar apply for information from ground station's nodal analysis method is replied, it comprises and is arranged in process level: the secondary radar responder module, 1090 data source modules, the aircraft node is destroyed module, the 1090MHz transmitter module, 1030MHz receiver module and the aircraft MAC module of controlling as the center, the secondary radar responder module, the output message of 1090 data source modules and 1030MHz receiver module inputs to respectively in the aircraft MAC module, judge by aircraft MAC module, if the ADS-B message that secondary radar response message that the secondary radar responder module produces and 1090 data source modules produce, then aircraft MAC module acknowledges message to ground station's nodal analysis method by 1090MHz transmitter module broadcasting ADS-B message and secondary radar, if the secondary radar apply for information from ground station's nodal analysis method that the reception of 1030MHz receiver module comes, aircraft MAC module is then delivered to the above-mentioned secondary radar apply for information that receives aircraft node destruction module and is destroyed;
Described ground station nodal analysis method is used to receive the ADS-B broadcast and sends the secondary radar apply for information to the aircraft nodal analysis method, it comprises and is arranged in process level: the 1090MHz receiver module, the 1030MHz transmitter module, ground station's node is destroyed module, secondary radar data source module and as the MAC of the ground station module of Central Control Module, the message of secondary radar data source module and the output of 1090MHz receiver module is delivered to respectively in the MAC of the ground station module, judge by the described MAC of ground station module, if the secondary radar apply for information that secondary radar data source module produces, the MAC of ground station module is then broadcasted the secondary radar apply for information to the aircraft nodal analysis method by the 1030MHz transmitter module, if the ADS-B message from the broadcasting of aircraft nodal analysis method that the 1090MHz receiver module receives, the MAC of ground station module is then delivered to the above-mentioned ADS-B message that receives ground station's node destruction module and is destroyed.
The present invention's advantage compared with prior art is: the present invention is owing to comprise network layer, node layer and process level, wherein network layer comprises network model and aircraft nodal analysis method, network model comprises n aircraft nodal analysis method being arranged in node layer and ground station's nodal analysis method etc. again, aircraft nodal analysis method and ground station's nodal analysis method design according to 1090MHz ADS-B system again, therefore be specially adapted in OPNET, carry out hierarchical design and modeling and simulating in 1090MHz ADS-B system, for subsequent user use and upgrading facilitates.
Description of drawings
Fig. 1 is the The general frame of analogue system of the present invention;
Fig. 2 is a network model schematic diagram of the present invention;
Fig. 3 is the correspondence schematic diagram between aircraft nodal analysis method of the present invention and the ground station's nodal analysis method;
Fig. 4 is the composition frame chart of aircraft nodal analysis method of the present invention;
Fig. 5 is the composition frame chart of ground station of the present invention nodal analysis method;
Fig. 6 is the workflow diagram of aircraft MAC module of the present invention;
Fig. 7 is the workflow diagram of the MAC of ground station module of the present invention.
Embodiment
As shown in Figure 1, the present invention comprises from top to bottom: network layer, node layer and process level.Network layer comprises network model, is mainly used to customize the network context environment of a suitable whole communication system, and the implementation procedure of network model is:
(1) in OPNET, selects topology of networks according to actual airport situation, configuration network scale and background map;
(2) create a subnet model that is arranged in node layer, this subnet model is placed into certain of map, and the attributes such as geographic range of subnet are set;
(3) in this subnet model, place a plurality of aircraft nodal analysis methods and ground station's nodal analysis method, and respective attributes is set, as height, track etc.
Specific to implementation procedure of the present invention can for: the map of building a Beijing-centered with drive the scene that aircraft is communicated by letter with a ground station more.Respective attributes be provided with as: the map size is 1500*1000km, and the aircraft height of node is 9000feet, and ground station's height of node is 30feet etc., as shown in Figure 2.
2. aircraft nodal analysis method and ground station's nodal analysis method communicates by letter
As shown in Figure 3, aircraft nodal analysis method of the present invention and ground station's communication system functionality, be equipped with the receiver of Mode S transmitter and ATCRBS (secondary radar) on the aircraft nodal analysis method, ground station's nodal analysis method is equipped with the transmitter of Mode S receiver and ATCRBS (secondary radar).
Communication system mainly comprises two parts function:
(a) broadcasting ADS-B message: the aircraft nodal analysis method finishes broadcast by the 1090ES data link protocol, has the terminal of suitable equipment can receive ADS-B message.
(b) secondary radar SSR: ground station's nodal analysis method after the aircraft nodal analysis method successfully receives, sends SSR answer signal by 1090MHz by 1030MHz emission SSR request signal.
3. the composition and the realization thereof of the model of aircraft node and ground node model
(1) model of aircraft node
The function of aircraft nodal analysis method comprises broadcasting ADS-B message and the SSR on ground is replied.The aircraft nodal analysis method comprises and is arranged in process level: the secondary radar responder module, and 1090 data source modules, the aircraft node is destroyed module, 1090MHz transmitter module, 1030MHz receiver module and aircraft MAC module.
Aircraft MAC module is in the center, finishes the task of other each module data stream translation;
The input module of aircraft MAC module comprises: secondary radar responder module, 1090 data source modules and 1030MHz receiver module;
The output module of aircraft MAC module comprises: 1090MHz transmitter module and aircraft node are destroyed module.
Each functions of modules is as follows:
Secondary radar responder module: to replying of ground secondary radar.
1090 data source modules: simulation produces the data source module of Mode S ADS-B message.
Aircraft is destroyed module: destroy the information that all aircraft nodes receive.
1030MHz receiver module: receive request signal from the SSR of ground station.
1090MHz transmitter module: broadcasting ADS-B information.
Each module implementation is as follows:
Secondary radar responder module: adopt a simple data source generation module to come the secondary radar response message of simulated aircraft, and relevant parameter is set as wrapping size, transmission rate etc. to ground station.
1090 data source modules: adopt a simple data source generation module, being provided with as message format is the packet format of 1090 data chainnings regulation, and the bag size is 112bit, sends and is spaced apart 0.5 second.
The aircraft node is destroyed module: adopt the destruction module simulation of giving tacit consent among the OPNET to destroy process.
1030MHz receiver module: adopt the wireless receiver module among the OPNET, relevant configuration such as operating frequency, transmission rate, modulation system, power etc.
1090MHz transmitter module: adopt the wireless receiver module among the OPNET, relevant configuration such as operating frequency, transmission rate, modulation system, power etc.
Implementation procedure as Fig. 6 aircraft MAC module: come the division state according to the function that the MAC module will be finished, comprise initial condition, various message status (position class message status, speed class message status, state class message status, sign class message status), secondary radar response status, secondary radar accepting state and idle condition.
Initial condition: data initially enter the mouth, and finish the initial work of parameter and various statistical variables, and enter idle condition immediately.
Idle condition: program is waited for up to having and is interrupted producing under this state, and carries out Interrupt Process.
Various message status: comprise position class message status, speed class message status, state class message status, sign class message status four classes.Have no progeny in the procedure triggers, judge dissimilar message, and set different delays, be sent to the 1090MHz transmitter module at last and broadcast according to the difference of message rate according to different interruptions.
Secondary radar response status: receive data, and be sent to the 1090MHz transmitter module from the secondary radar responder module.
The secondary radar accepting state: receive request signal from the node SSR of ground station, i.e. the data of the 1030MHz of ground station transmitter module, and be sent to the aircraft node and destroy module and carry out data destroying.
(2) model of ground station's node
The function of ground station's nodal analysis method comprises and receives ADS-B message and to the SSR inquiry of aircraft nodal analysis method.Ground station's nodal analysis method comprises and is arranged in process level: the 1090MHz receiver module, and the 1030MHz receiver module, ground station's node is destroyed module, secondary radar data source module, the MAC of ground station module.
Ground station's MAC module is in the center, finishes the task of other each module data stream translation.
The input module of the MAC of ground station module: 1090MHz receiver module and secondary radar data source module.
The output module of the MAC of ground station module: 1030MHz receiver module and ground station's node are destroyed module.
Above-mentioned each module implementation is as follows:
Secondary radar data source module: adopt a simple data source generation module to come the secondary radar response message of simulated aircraft, and relevant parameter is set as wrapping size, transmission rate etc. to ground station.
Ground station's node is destroyed module: adopt the destruction module simulation of giving tacit consent among the OPNET to destroy process.
1090MHz receiver module: adopt the wireless receiver module among the OPNET, the pipeline model that modification can the reception group, relevant configuration such as operating frequency, transmission rate, modulation system, power etc.
1030MHz transmitter module: adopt the wireless receiver module among the OPNET, relevant configuration such as operating frequency, transmission rate, modulation system, power etc.
Implementation procedure as the MAC of Fig. 7 ground station module: come the division state according to the function that the MAC module will be finished, comprise initial condition, secondary radar transmit status, ADS-B message sink state and idle condition.
Initial condition: data initially enter the mouth, and finish the initial work of parameter and various statistical variables, and enter idle condition immediately.
Idle condition: program is waited for up to having and is interrupted producing under this state, and carries out Interrupt Process.
Secondary radar transmit status: receive data, and be sent to the 1030MHz transmitter module from secondary radar data source module.
ADS-B message sink state: receive ADS-B signal from the aircraft node, i.e. the data of aircraft 1090MHz transmitter, and be sent to ground station's node and destroy module and carry out data destroying.
As shown in Figure 7, the implementation procedure of the MAC of ground station module: come the division state according to the function that the MAC module will be finished, comprise initial condition, secondary radar transmit status, ADS-B message sink state and idle condition.Initial condition: data initially enter the mouth, and finish the initial work of parameter and various statistical variables, and enter idle condition immediately.Idle condition: program is waited for up to having and is interrupted producing under this state, and carries out Interrupt Process.Secondary radar transmit status: receive data, and be sent to the 1030MHz transmitter from secondary radar data source module.ADS-B message sink state: receive ADS-B message from the aircraft node, i.e. the data of aircraft 1090MHz transmitter, and be sent to ground station's node and destroy module and carry out data destroying.
Claims (10)
1, a kind of performance simulation system that is used for OPNET 1090MHz ADS-B system is characterized in that comprising: network layer, node layer and process level, wherein:
Network layer is used for customizing the network context environment of a suitable whole communication system, and described network layer is made of network model, and described network model comprises n aircraft nodal analysis method and ground station's nodal analysis method, wherein n 〉=1 that is arranged in node layer:
Described aircraft nodal analysis method is used for broadcasting ADS-B message and the secondary radar apply for information from ground station's nodal analysis method is replied, it comprises and is arranged in process level: the secondary radar responder module, 1090 data source modules, the aircraft node is destroyed module, the 1090MHz transmitter module, 1030MHz receiver module and the aircraft MAC module of controlling as the center, the secondary radar responder module, the output message of 1090 data source modules and 1030MHz receiver module inputs to respectively in the aircraft MAC module, judge by aircraft MAC module, if the ADS-B message that secondary radar response message that the secondary radar responder module produces and 1090 data source modules produce, then aircraft MAC module acknowledges message to ground station's nodal analysis method by 1090MHz transmitter module broadcasting ADS-B message and secondary radar, if the secondary radar apply for information from ground station's nodal analysis method that the reception of 1030MHz receiver module comes, aircraft MAC module is then delivered to the above-mentioned secondary radar apply for information that receives aircraft node destruction module and is destroyed;
Described ground station nodal analysis method is used to receive ADS-B message and sends the secondary radar apply for information to the aircraft nodal analysis method, it comprises and is arranged in process level: the 1090MHz receiver module, the 1030MHz transmitter module, ground station's node is destroyed module, secondary radar data source module and as the MAC of the ground station module of Central Control Module, the message of secondary radar data source module and the output of 1090MHz receiver module is delivered to respectively in the MAC of the ground station module, judge by the described MAC of ground station module, if the secondary radar apply for information that secondary radar data source module produces, the MAC of ground station module is then broadcasted the secondary radar apply for information to the aircraft nodal analysis method by the 1030MHz transmitter module, if the ADS-B message from the broadcasting of aircraft nodal analysis method that the 1090MHz receiver module receives, the MAC of ground station module is then delivered to the above-mentioned ADS-B message that receives ground station's node destruction module and is destroyed.
2, the performance simulation system that is used for OPNET 1090MHz ADS-B system according to claim 1 is characterized in that: the implementation procedure of described aircraft MAC module:
(1) initial condition: data initially enter the mouth, and finish the initial work of parameter and various statistical variables, and enter idle condition immediately;
(2) idle condition: this state is waited for down up to there being data interruption to produce, and interrupt type is judged;
(3) if what receive is the ADS-B message that 1090 data source modules send, then further judge it is speed class message transfer request or position class message transfer request or state class message transfer request or sign class message transfer request, carry out the processing of speed class message status or position class message status or state class message status or sign class message status after the judgement respectively, set different delays according to the difference of each message rate, be sent to the 1090MHz transmitter module at last and broadcast;
(4) if what receive is the secondary radar response message that the secondary radar responder module produces, then carries out the processing of secondary radar response message, and be sent to the 1090MHz transmitter module;
(5) if what receive is secondary radar apply for information in ground station's nodal analysis method of producing of 1030MHz receiver module, then carry out the processing of secondary radar apply for information, and be sent to the aircraft node and destroy module and carry out data destroying.
3, the performance simulation system that is used for OPNET 1090MHz ADS-B system according to claim 1, it is characterized in that: secondary radar responder module in the described aircraft nodal analysis method adopts the message that the default data source module produces among the OPNET to come the secondary radar response message of simulated aircraft to ground station, and the bag size is set and transmission rate realizes.
4, the performance simulation system that is used for OPNET 1090MHz ADS-B system according to claim 1, it is characterized in that: 1090 data source modules in the described aircraft nodal analysis method adopt default data source module among the OPNET, it is the packet format of 1090 data chainnings regulation that message format is set, the bag size is 112bit, and transmission is spaced apart 0.5 second and realizes.
5, the performance simulation system that is used for OPNET 1090MHz ADS-B system according to claim 1 is characterized in that: ground station's node that the aircraft node in the described aircraft nodal analysis method is destroyed in module and the ground station's nodal analysis method is destroyed the destruction module simulation destruction process realization of giving tacit consent among the module employing OPNET.
6, the performance simulation system that is used for OPNET 1090MHz ADS-B system according to claim 1, it is characterized in that: 1030MHz receiver module in the described aircraft nodal analysis method adopts the wireless receiver module among the OPNET, and the configuration of carrying out operating frequency, transmission rate, modulation system and power-related parameter realizes.
7, the performance simulation system that is used for OPNET 1090MHz ADS-B system according to claim 1, it is characterized in that: the implementation procedure of the described MAC of ground station module: comprise initial condition, secondary radar transmit status, ADS-B message data accepting state and idle condition, wherein:
(1) initial condition: data initially enter the mouth, and finish the initial work of parameter and various statistical variables, and enter idle condition immediately;
(2) idle condition: program is waited for up to having and is interrupted producing under this state, and carries out Interrupt Process;
(3) secondary radar transmit status: receive the secondary radar apply for information that produces from secondary radar data source module, and be sent to the 1030MHz transmitter module;
(4) ADS-B message data accepting state: receive the ADS-B message that sends from 1090MHz transmitter module in the aircraft nodal analysis method, and be sent to ground station's node and destroy module and carry out data destroying.
8, the performance simulation system that is used for OPNET 1090MHz ADS-B system according to claim 1, it is characterized in that: the 1090MHz receiver module in the described ground station nodal analysis method adopts the wireless receiver module among the OPNET, revise the pipeline model of reception group, and the configuration of carrying out operating frequency, transmission rate, modulation system and power-related parameter realizes.
9, the performance simulation system that is used for OPNET 1090MHz ADS-B system according to claim 1, it is characterized in that: the 1030MHz transmitter module adopts the transmitting set module among the OPNET in the described ground station nodal analysis method, and the configuration of carrying out operating frequency, transmission rate, modulation system and power-related parameter realizes.
10, the performance simulation system that is used for OPNET 1090MHz ADS-B system according to claim 1, it is characterized in that: secondary radar data source module adopts the message that the default data source module produces among the OPNET to simulate the secondary radar apply for information of ground station to aircraft in the described ground station nodal analysis method, and the bag size is set and transmission rate realizes.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102226838B (en) * | 2011-03-30 | 2012-12-05 | 安徽四创电子股份有限公司 | S-mode secondary radar coding and decoding system with ADS-B function |
| US9407638B2 (en) * | 2013-08-26 | 2016-08-02 | The Boeing Company | System and method for trusted mobile communications |
| CN104202080A (en) * | 2014-09-09 | 2014-12-10 | 安徽四创电子股份有限公司 | 60M radar data transmission device |
| CN104316911B (en) * | 2014-10-21 | 2016-08-17 | 中国航空无线电电子研究所 | A kind of multi-mode air-control signal simulation excitation machine |
| CN104777464B (en) * | 2015-04-20 | 2017-03-29 | 中国民航大学 | The method that many radar data HWIL simulations are realized using ADS B datas |
| CN104865939A (en) * | 2015-04-22 | 2015-08-26 | 中国民用航空总局第二研究所 | Ground monitoring device, method and system |
| CN105160118B (en) * | 2015-09-14 | 2018-04-06 | 电子科技大学 | A kind of 1090MHz signal environment assessment systems based on Computer Simulation |
| CN109525335B (en) * | 2018-12-28 | 2020-12-11 | 四川九洲空管科技有限责任公司 | ADS-B ground equipment receiving performance evaluation method |
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