CN102333003B - Simulation test system of data casting distribution network - Google Patents
Simulation test system of data casting distribution network Download PDFInfo
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- CN102333003B CN102333003B CN201010223707.0A CN201010223707A CN102333003B CN 102333003 B CN102333003 B CN 102333003B CN 201010223707 A CN201010223707 A CN 201010223707A CN 102333003 B CN102333003 B CN 102333003B
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Abstract
The invention discloses a simulation test system of a data casting distribution network, which comprises a computer, a network card and a serial communication server, wherein the computer is communicated with the serial communication server through the network card. The serial communication server simulates a multipath serial device. The computer simulates a channel simulation module and an earth station simulation module through programming; and the channel simulation module and the earth station simulation module are connected to a network control center through the multipath serial device for implementing system tests on the network control center. The simulation test system simulates a multi-serial port parallel technology of the multipath serial device by adopting a network device, is compatible with unified package and unwrapping algorithms of multiple kinds of serial devices for carrying out cache processing on residual data, can realize automatic sending and receiving through configuration because quantity of simulation station types can be expanded, realizes a wireless channel simulation function, and is used for simulating transmission quality of various wireless channels and monitoring all serial data as well we analyzing and displaying all signaling messages by layers and classes with selectable display contents.
Description
Technical field
The invention belongs to the system testing scheme in a kind of satellite communication system, specifically a kind of simulation test system of data casting distribution network.
Background technology
Satellite data broadcasting distribution networks is single, double quantitatively sharply to be increased in utilization field and utilization to site type equipment, increased new application demand simultaneously, network control systems face upgrade maintenance, the aspect such as in internal data, process, network control parameter is controlled, man-machine interface is mutual and had new higher requirement, and in the process of network control upgrading, in the situation that installing equipment is difficult on deck for the moment, has produced and will set up and stablize real test run environment by analogue system.
In order to coordinate the needs of the network control system testing of data broadcast distribution networks and upgrading, accelerate the process of establishing of fixing, long-term debugging enironment, the in the situation that of being difficult to for the moment carry out on deck the tests such as function, performance, load, reliability at actual load site type equipment, need to develop analog simulation test macro, complete the test of network control system upgrade.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention is by the means of software programming, at computer, network interface card, under the hardware supports that tri-equipment of NPORT5610 connect at netting twine, the many serial equipments that simulate by NPORT5610, communicate the interconnection and interflow of system, propose a kind of simulation test system of data casting distribution network, concrete technical scheme is as follows:
An emulation test system, comprises computer, network interface card and serial communication server, and computer communicates by network interface card and serial communication server;
By described serial communication server Multipexer serial equipment, for carrying out parallel communications with each equipment of measurand network control center;
By described computer, pass through programming analog channel emulation module and earth station emulation module; Channel simulator module and earth station emulation module, be connected to described network control center by described many serial equipments, implements the system testing to network control center;
A) earth station emulation module: emulation earth station data transmit-receive, realize reception and the transmission of short message, and the control class signaling of network control center and earth station is mutual:
B) channel simulator module: realize the emulation of two kinds of channels, the stream mode of data is depended in such emulation; These two kinds of channels are earth station channel and network control center channel; Channel is realized the transmission from information source to the stay of two nights of data;
Described many serial equipments directly connect by cable, the transmitting procedure of emulation wireless link, and the connection of specific implementation comprises: collection of letters road, the collection of letters road of earth station and the posting a letter of network control center of posting a letter with network control center of earth station;
C) network control center: the information content is carried out to relaying transmitting-receiving; Network control center is divided into two modules, and receiver module and regular forwarding module, connect respectively receive channel and transmitting channel;
Signal trend:
Earth station emulation module, first edits generation information, after encapsulating, enters channel simulator module by format;
Channel simulator module, is first used transmission form again to encapsulate, and then uses the simulative serial port of the multi-channel serial port equipment in this channel simulator module that is connected to carry out the transmission of data; The receive channel that is connected to the network control center of this serial ports is received this data content, after this receive channel is processed data, data is sent to the receiver module of network control center;
The receiver module of ，You network control center, network control center first parses information to data, then connects by network, information is passed to the regular forwarding module of network control center; The regular forwarding module of network control center is stored and forward process; Forwarding is that the transmitting channel by being connected on regular forwarding module is realized, and this channel connects the reception analog channel emulation module of earth station; This analog channel emulation module, by after Data Analysis, is submitted to earth station emulation module, the processing such as shows, reply;
So far process completes whole communication process once mutual of this system.
The function of described earth station emulation module also comprises: the editor of message generates, transceiver channel switches, report GPS information.
The feasibility of described channel simulator depends on that system itself, for the shared model of channel resource, completes the transmission of information by the parsing of the information content.
The regular forwarding module of described network control center is to be the flag information of source, object according to the information content, stores and forward process.
Each device data of the measurand network control center that described multi-channel serial port equipment receives is used unified encapsulation and unpacks algorithm, and remaining data is carried out to caching process; Concrete grammar is as follows:
By the flag bit effect of fixed byte and the escape effect of this flag bit, realize the sign of message content integrality; By receiving thread function, carry out the buffer memory of data in internal memory, then by unpacking thread function, this internal storage data is processed, in these two thread function, increase the write operation of this section of internal memory is locked, guarantee its safety simultaneously;
In unpacking thread function, data content is carried out to byte-by-byte comparison, find out qualified message content, and residue content is carried out to buffer memory, under the fields such as effect, length auxiliary, do not lose qualified data, also avoid wrong frame to produce harmful effect to system.
Described earth station emulation module simulates one or more earth stations, configures as follows:
Message edit box: the message content this time sending;
Transmitter station address: the identity of simulation dispatching station, network control receipt is used;
Address, point of destination: the identity of point of destination, network control forwards to be used;
Send interval: the interval that each station sends, this parameter is not strict, mainly for the overall process ability of test macro, can send by level second, can control the normally operation in performance index of this satellite system;
Circulation sample: by the variation capable of circulation of transmitter station address and address, point of destination, complete the object of simulation multistation, this range of the sample maximum is 65535, simulates the hand-held station of this quantity.
Cycle-index: the object of this parameter is in order to realize automatic transmission message, the cycle period of circulation sample is taken advantage of to the object that reaches overall control of number of times; This parameter is for controlling the demand of detecting large volume;
By being used in conjunction with of above parameter, can complete the function of the operation of emulation list station and multistation operation.
Flow data to each equipment of the described measurand network control center receiving carries out segmentation restructuring, is reduced to original Access Layer and network layer segment data, then processes.
Native system has been simulated the concept of replying probability, and simulation is owing to losing the situation of number, wrong number, bottom pour ladle, Cuo Bao, conflict, saturated and other abnormal Frame mistakes that produce, and the fault-tolerant processing of network control center etc. is carried out to emulation;
Network control center, when various abnormal generation, to extremely not processing, but is not had influence on proper communication next time by it; The concept of for this reason replying probability can realize on request, and the fault-tolerant rule of checking network control center rule forwarding module and delay disposal rule and delayed recovery rule are verified;
Random factor: by the input of random factor, reply the Accurate Design of probability;
Reply probability: by replying the input of probability, the severe degree of Reality simulation environment.
Native system:
1) adopt by many serial ports concurrent technique of network equipment Multipexer serial equipment;
2) compatible multiple serial equipment is used unified encapsulation and unpacks algorithm, and remaining data is carried out to caching process;
3) emulation site type quantity can be expanded, and can automatically send by Configuration, receive;
4) realize wireless channel simulation function, simulate various wireless channel transmission qualities (containing packet loss, wrong bag etc.);
5) monitor all serial datas, layering, classification are resolved and show all signaling messages, and displaying contents can be selected.
Beneficial effect:
The major function that satellite data broadcasting distribution networks emulation test system is realized:
1) simulated dual, to small station, station end, realizes the message sending and receiving of site type in enormous quantities, webmaster order application is entered to application transmission and the processing to the acknowledgement command that it is replied of logout, completes the transmission of GPS map message, forms the message source that upper figure shows.
2) simulate the operation of a plurality of TDM and ALOHA control channel, to parsing and the demonstration that the complete order of its transmission is classified, layering is detailed, its order is carried out from dynamic response simultaneously, and data are retained and carry out controlling configuration; Running status is controlled.
3) offered load is controlled, and small station quantity can be expanded, and communication object is configurable; Message content can manually be controlled separately also can add transmission interval on this basis, and the automatic control message that circulation sample and cycle-index are carried out automatic controlled both sides address sends; The automatic monitoring of webmaster acknowledgement messaging is processed;
4) realize wireless channel simulation function, can control random probability and reply, simulate various probabilities and complete replying of small station, probability is controlled by random factor and random probability, can prepare;
5) GPS can send by content of edit, to both sides address, and additional content, dispatching station title, type of alarm, dangerous situation pattern, the factors such as dispatching station longitude and latitude can be changed;
6) the sending and receiving flow of each TDM and ALOHA control channel is added up respectively to, the byte number of transmitting-receiving and flow are carried out respectively real-time statistics and refresh demonstration.
Accompanying drawing explanation
Fig. 1 is data broadcast distribution emulation test system schematic diagram.
Fig. 2 is the main interface of analogue system function schematic diagram.
Fig. 3 is analogue system site type operation interface schematic diagram.
Fig. 4 is each channel data of analogue system total amount statistics schematic diagram of receiving and sending messages.
Embodiment
Below in conjunction with accompanying drawing and embodiment, native system is further described.
An emulation test system, comprises computer, network interface card and serial communication server, and computer communicates by network interface card and serial communication server;
By described serial communication server Multipexer serial equipment (can be specifically multi-channel serial port card), for carrying out parallel communications with each equipment of measurand network control center;
By described computer, pass through programming analog channel emulation module and earth station emulation module;
Channel simulator module and earth station emulation module, be connected to described network control center by described many serial equipments, implements the system testing to network control center.
1, earth station emulation module, main emulation earth station data transmit-receive, realizes reception and the transmission of short message, and the control class signaling of network control center and earth station is mutual.Other functions comprise: editor's systematic function of message, transceiver channel handoff functionality, report GPS informational function etc.
2, channel simulator module, mainly realizes the emulation of two kinds of channels, and the stream mode of data is depended in such emulation, and two kinds of channels refer to earth station channel and network control center channel.The main purpose of channel is to realize the transmission from information source to the stay of two nights of data, this analogue system is used multi-channel serial port card to realize following connection: collection of letters road, the collection of letters road of earth station and the posting a letter of network control center of posting a letter with network control center of earth station, by cable, directly connect the transmitting procedure of emulation wireless link.The feasibility of channel simulator depends on that system itself is for the shared model of channel resource, the transmission of the parsing by the information content rather than the information of having monopolized by channel.
3, network control center, a control centre that the information content is carried out to relaying transmitting-receiving.Due to the restriction of the reasons such as transmitted power and waveform frequency, lower powered hand-held station must be realized communication by the transmitting-receiving relaying of major station.Network control center is divided into two modules, and receiver module and regular forwarding module, connect respectively receive channel and transmitting channel.
4, signal trend: earth station emulation module, editor's generation information, after encapsulating by format, enter channel simulator module, channel simulator module is used transmission form again to encapsulate, then use the simulative serial port that is connected to the multi-channel serial port card in this channel simulator module to carry out the transmission of data, the receive channel that is connected to the network control center of this serial ports is received this data content, after receive channel is processed data, data are sent to the receiver module of network control center, network control center receiver module parses information to data analysis later, by network, connect, information is passed to network control center rule forwarding module.Network control center rule forwarding module is stored and forward process according to the information content (comprising the flag informations such as source, object), forwarding is that the transmitting channel by being connected on regular forwarding module is realized, and this channel connects earth station and receives analog channel emulation module.Analog channel emulation module, by after Data Analysis, is submitted to earth station emulation module, the processing such as shows, reply.This process completes whole communication process once mutual of this system.
Network control center rule forwarding module is stored and forward process according to the information content (comprising the flag informations such as source, object).
Each device data of the measurand network control center that described multi-channel serial port equipment receives is used same encapsulation and unpacks algorithm, and remaining data is carried out to caching process; Encapsulate and unpack algorithm and need unified reason:
Common multi-channel serial port card is strict pattern of traffic data, and the transmitting-receiving of data may have to be interrupted and postpones; This routine NPORT series serial port board is a kind of data transfer equipment that transfers serial ports from network to, and the transmitting-receiving of data postpones and interrupts almost not having, and for the reception of serial data, can, by after appropriate time delay, as UDP message, be processed into frame data.For making the reception & disposal of data not be subject to the restriction of serial port board, therefore data have been carried out to the unification of algorithm.
By the flag bit effect of fixed byte and the escape effect of this flag bit, realize the sign of message content integrality.By receiving thread function, carry out the buffer memory of data in internal memory, then by unpacking thread function, this internal storage data is processed, in these two thread function, increase the write operation of this section of internal memory is locked, guarantee its safety simultaneously.
In unpacking thread function, data content is carried out to byte-by-byte comparison, find out qualified message content, and residue content is carried out to buffer memory, under the fields such as effect, length auxiliary, reach and do not lose the qualified data of a frame, also not because other wrong frame produces harmful effect to system.
Described earth station emulation module simulates one or more earth stations, and earth station emulation module has mainly been simulated earth station transmission-receiving function, in order to make system carry out pressure test from function and performance, therefore need the large-scale earth station data transmit-receive of simulation.Concrete configuration is as follows:
Message edit box: the message content this time sending;
Transmitter station address: the identity of simulation dispatching station, network control receipt is used;
Address, point of destination: the identity of point of destination, network control forwards to be used;
Send interval: the interval that each station sends, this parameter is not strict, mainly for the overall process ability of test macro, can send by level second, can control the normally operation in performance index of this satellite system;
Circulation sample: by the variation capable of circulation of transmitter station address and address, point of destination, complete the object of simulation multistation, this range of the sample maximum can reach 65535, simulates the hand-held station of this quantity;
Cycle-index: the object of this parameter is in order to realize automatic transmission message, the cycle period of circulation sample is taken advantage of to the object that reaches overall control of number of times.This parameter is for controlling the demand of detecting large volume;
By being used in conjunction with of above parameter, can complete the function of the operation of emulation list station and multistation operation.
Key algorithm and description of equipment:
Data distributing broadcasting system emulation test system as shown in Figure 1, is comprised of channel simulator and 2 modules of earth station emulation, by access server, is connected to measurand network control center, implements the system testing to network control center.
The key algorithm that system relates to comprises:
1) flow data staged and layered is processed
In data distributing broadcasting system, channel access layer and network layer all adopt segment data format protocol, but be all to adopt successive byte or bit stream mode in actual physics channel interface and transmission, this just requires to want stream data to carry out segmentation restructuring at receiving terminal, be reduced to original Access Layer and network layer segment data, then process.In flow data restructuring, to consider the factors such as the time delay of data, saturated, mistake, take suitable abandoning or cycle calculations measure.
In order to meet information in the transmission of network layer and utilization layer, must carry out to information the encapsulation of data, the technical program is mainly for adapting to transmission and the parsing of data in channel and in network control center and in earth station terminal, and the Meaning transfer carrying out, verification, assembling etc.Involve the mutual format understanding in three kinds of modules to the realization of concrete function and data of concrete data.
2) wireless channel simulation model
For approaching to reality environmental testing network control systematic function more, reliable, fault-tolerant ability, require the channel simulator module can be with multiple mode analog channel transmission, comprise lose number, wrong number, bottom pour ladle, Cuo Bao, conflict, saturated etc. various extremely can emulation.Every kind of abnormal model can comprehensively distribute, also can independent allocation, and distribution can be injected on multiple layer module, and every kind of abnormal probability capable of dynamic is adjusted.Through multiple model in a large number, test for a long time, the reliability of network control system just can be guaranteed, and embodies the value of emulation test system.
In order to realize the simulation to above-mentioned true environment, simulated the concept of replying probability, simulation is due to the situation of the Frame mistake of above reason generation, and the fault-tolerant processing of network control center etc. is carried out to emulation.Network control center, can be to extremely not processing when various abnormal generation, but can not be had influence on proper communication next time by it, the index to network control center system service requirement on this.The concept of for this reason replying probability can realize on request, and the fault-tolerant rule of checking network control center rule forwarding module and delay disposal rule and delayed recovery rule are verified.
Random factor: by the input of random factor, reply the Accurate Design of probability.
Reply probability: by replying the input of probability, the severe degree of Reality simulation environment.
The main interface of analogue system, as Fig. 2: in receiving information list and sending information list, show that respectively TDM and ALOHA organize the message that channel is received more, and replying these message.The configurable preservation of data in list.In two-way station information shows, show the data message relevant to single-direction and dual-direction station, and the single-direction and dual-direction station of simulation is to receiving the later information such as receipt of message and call information and the content information of initiatively initiating.In the information flow of lower left corner shows in real time, constantly refresh the current 16 system bit streams of receiving, lower right corner is presented at the bit stream of all information in three list boxes above and detailed protocols is resolved and information content parsing.
Site type operation interface, as Fig. 3: mainly realize the simulation that site type operates in practice, be divided into: message content, network management request, wireless network are replied probability setting, GPS information reporting, five functional modules of test data set.
As Fig. 4, flow system flow monitoring: this module shows the average discharge sum test statistics of each serial data in real time.According to the mode of operation that can observe each serial ports that refreshes at interface, each physical serial interface is carried out to the statistics of performance and the policy of selection.
Extendible execution mode
1) on control strategy, can customize and more improve data and send opportunity, sending strategy, send content, strengthen the controllable configuration item of automation of these processes, reach automatic test, statistics storage automatically, for checking.
2) increase much information statistical function, the flow indicator in work, operational indicator, forwarding success rate, buffer memory rate, retransmission failure rate, the expired rate of information etc. are added up, by these statistical information time segment statistics storages, for analyzing.
3) consideration memory mechanism, to all data with time tag, band string slogan, with content and the former data of Preliminary Analysis classify, the storage of timesharing.With daemon software, analyze ready-made data, carry out information playback, fault recurrence, positioning problems.
Claims (7)
1. a data distributing broadcasting system emulation test system, is characterized in that comprising computer, network interface card and serial communication server, and computer communicates by network interface card and serial communication server;
By described serial communication server Multipexer serial equipment, for carrying out parallel communications with each equipment of measurand network control center;
By described computer, pass through programming analog channel emulation module and earth station emulation module; Channel simulator module and earth station emulation module, to described network control center, implement the system testing to network control center by described multi-channel serial port equipment connection;
A) earth station emulation module: emulation earth station data transmit-receive, realize reception and the transmission of short message, and the control class signaling of network control center and earth station is mutual;
B) channel simulator module: realize the emulation of two kinds of channels, the stream mode of data is depended in such emulation; These two kinds of channels are earth station channel and network control center channel; Channel is realized the transmission from information source to the stay of two nights of data;
Described multi-channel serial port equipment is directly connected to described network control center by cable, the transmitting procedure of emulation wireless link, and the connection of specific implementation comprises: collection of letters road, the collection of letters road of earth station and the posting a letter of network control center of posting a letter with network control center of earth station;
C) network control center: the information content is carried out to relaying transmitting-receiving; Network control center is divided into two modules, and receiver module and regular forwarding module connect respectively the collection of letters road of network control center and posting a letter of network control center;
Signal trend:
Earth station emulation module, first edits generation information, after encapsulating, enters channel simulator module by format;
Channel simulator module, is first used transmission form again to encapsulate, and then uses the simulative serial port of the multi-channel serial port equipment in this channel simulator module that is connected to carry out the transmission of data; The content of these data is received in the collection of letters road that is connected to the network control center of this serial ports, after the collection of letters road of the network control center of this serial ports is processed data, data is sent to the receiver module of network control center;
The receiver module of ，You network control center, network control center first parses information to data, then connects by network, information is passed to the regular forwarding module of network control center; The regular forwarding module of network control center is stored and forward process; Forwarding is that the transmitting channel by being connected on regular forwarding module is realized, and this channel connects the receipts channel simulator module of earth station; This channel simulator module, by after Data Analysis, is submitted to earth station emulation module, shows, reply process;
So far process completes whole communication process once mutual of this system;
Each device data of the measurand network control center that described multi-channel serial port equipment receives is used unified encapsulation and unpacks algorithm, and remaining data is carried out to caching process; Concrete grammar is as follows:
By the flag bit effect of fixed byte and the escape effect of this flag bit, realize the sign of message content integrality; By receiving thread function, carry out the buffer memory of data in internal memory, then by unpacking thread function, this internal storage data is processed, in these two thread function, increase the write operation of this section of internal memory is locked, guarantee its safety simultaneously;
In unpacking thread function, data content is carried out to byte-by-byte comparison, find out qualified message content, and residue content is carried out to buffer memory, under effect, length field auxiliary, do not lose qualified data, also avoid wrong frame to produce harmful effect to system.
2. data distributing broadcasting system emulation test system according to claim 1, is characterized in that the function of described earth station emulation module also comprises: the editor of message generates, transceiver channel switches, report GPS information.
3. data distributing broadcasting system emulation test system according to claim 1, is characterized in that the feasibility of channel simulator depends on that system itself, for the shared model of channel resource, completes the transmission of information by the parsing of the information content.
4. data distributing broadcasting system emulation test system according to claim 1, the regular forwarding module that it is characterized in that described network control center is to be the flag information of source, object according to the information content, stores and forward process.
5. data distributing broadcasting system emulation test system according to claim 1, is characterized in that described earth station emulation module simulates one or more earth stations, configures as follows:
Message edit box: the message content this time sending;
Transmitter station address: the identity of simulation dispatching station, network control receipt is used;
Address, point of destination: the identity of point of destination, network control forwards to be used;
Send interval: the interval that each station sends, this parameter is not strict, mainly for the overall process ability of test macro, can send by level second, can control the normally operation in performance index of this satellite system;
Circulation sample: by the variation capable of circulation of transmitter station address and address, point of destination, complete the object of simulation multistation, this range of the sample maximum is 65535, simulates the hand-held station of this quantity;
Cycle-index: the object of this parameter is in order to realize automatic transmission message, the cycle period of circulation sample is taken advantage of to the object that reaches overall control of number of times; This parameter is for controlling the demand of detecting large volume;
By being used in conjunction with of above parameter, can complete the function of the operation of emulation list station and multistation operation.
6. data distributing broadcasting system emulation test system according to claim 1, it is characterized in that the flow data of each equipment of the described measurand network control center receiving to carry out segmentation restructuring, be reduced to original Access Layer and network layer segment data, then process.
7. data distributing broadcasting system emulation test system according to claim 1, it is characterized in that native system simulated the concept of replying probability, simulation, owing to losing the situation of number, wrong number, bottom pour ladle, Cuo Bao, conflict, saturated and other Frame mistakes that extremely produce, is carried out emulation to the fault-tolerant processing of network control center;
Network control center, when various abnormal generation, to extremely not processing, but is not had influence on proper communication next time by it; The concept of for this reason replying probability realizes on request, and the fault-tolerant rule of checking network control center rule forwarding module and delay disposal rule and delayed recovery rule are verified;
Random factor: by the input of random factor, reply the Accurate Design of probability;
Reply probability: by replying the input of probability, the severe degree of Reality simulation environment.
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| US7432981B1 (en) * | 2004-12-13 | 2008-10-07 | Nvidia Corporation | Apparatus, system, and method for processing digital audio/video signals |
| CN101764809A (en) * | 2009-12-18 | 2010-06-30 | 航天东方红卫星有限公司 | Satellite test data collection framework system |
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