CN104868958A - Data transmission test method based on time division multiple access spatial dynamic network - Google Patents
Data transmission test method based on time division multiple access spatial dynamic network Download PDFInfo
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Abstract
The invention discloses a data transmission test method based on a time division multiple access spatial dynamic network. The technical proposal of the invention is characterized by establishing a test environment which is composed of a network data semi-object test device and a measured satellite, performing test configuration and task planning to a test scene with the network data semi-object test device to judge whether the measured satellite is in orbit, calculating orbital data of a virtually directive star if the measured satellite is in orbit, otherwise, directly generating testing data, and distributing the data to each software of the network data semi-object test device; determining a goal node connected with each time slot with chain establishing directive software of the measured satellite, and calculating a link directivity; finally evaluating testing performance of the data transmission of the measured satellite. The test method of the invention can be used for finishing network protocol testing of the time division multiple access spatial dynamic network at ground test stage and satellite on-orbit stage on one set of hardware equipment under the premise that the satellite does not need to change self state.
Description
Technical field
The present invention relates generally to a kind of data transmission testing method based on time division multiple access access Spatial distributions network.The method utilizes time division multiple access to access the feature of Spatial distributions network, adopt a set of hardware device, realize the network protocol stack process of full constellation satellite node, for satellite is in the development stage or the non-networking stage provides a kind of method of testing of network data transfer protocol in-orbit.
Background technology
Network data transmission between satellite is a new direction of satellite technology development, and time division multiple access access Spatial distributions network is the abstract model of network between existing satellite.The feature of time division multiple access access Spatial distributions network is: do not connect between network node always, but regular connection and disconnection; Transfer of data is semiduplex, namely a certain section of time data can only uniaxially from a node-node transmission to another node; The memory capacity of network node is limited; The data-handling capacity of network node is limited; Network data transmission has certain reliability requirement, and namely significant data requires that receiving node returns to sending node answer signal, replys if do not received in certain hour, and data need to retransmit; The transmission of data is sorted according to data priority, the high priority data transmission that priority is high; Network is planar structure, and back end is equal, does not have master slave relation between node.
For the feature of time division multiple access access Spatial distributions network, the specialized designs network transmission protocol, guarantees that data can under the condition of processing node resource-constrained precise and high efficiency transmission, prevents network congestion phenomenon from occurring.
Set up physical connection and transfer of data between the satellite node participating in networking to be controlled by link setup planning table and routing table (according to 201510004471.4: a kind of reliable data transmission method accessing Spatial distributions network based on time division multiple access), wherein link setup planning table regulation satellite in what moment is connected with target satellite, the via node that routing table specified data transmits between sending node and destination node, i.e. data transfer path.
If application number is 201510004471.4 as described in patent (a kind of reliable data transmission method based on time division multiple access access Spatial distributions network), link setup planning table specifies the annexation of each data transmission nodal at particular moment and particular data transmission node in seasonal effect in time series mode, this annexation is with time slot (a period of time gap) for unit, and in a time slot, annexation is constant.
Link setup planning table has 2, is respectively gauge outfit and table body.
Gauge outfit is made up of initial time and end time two territories, and initial time refers to that the moment that affiliated link setup planning table comes into force, end time refer to the moment that affiliated link setup planning table lost efficacy.
Table body has P item, P=(end time-initial time)/time slot, and namely link setup planning table length effective time is P time slot.Table body is made up of 3 territories, and 3 territories are respectively time-gap number, the linking objective node of current time slots, the reiving/transmitting state of current time slots.Time slot refers to the time period between initial time and end time.Table the bodily form as:
1) time-gap number: be initial with 1, order increases, and maximum is P.
2) destination node number: notebook data transmission node is at the connection data transmission node of this time slot.
3) reiving/transmitting state: the destination node corresponding to destination node number, in the state of this time slot, has and receives and send two states.
Routing table defines data are sent to receiving node transmission path from sending node.
Routing table has 2, is respectively routing table gauge outfit and routing table table body.
Routing table gauge outfit is made up of routing table initial time and routing table end time two territories, and routing table initial time refers to the moment that affiliated routing table comes into force, and routing table end time refers to the moment that affiliated routing table lost efficacy.
Table body has N item, and every comprises 2 territories, is respectively:
1) routing table destination node number: the data transmission nodal in data transmission environments.
2) forward node number: head-end site.
Routing table specifies total data transmission node as forward node during transfer of data final goal node, arranges according to the number order of data transmission nodal.
For all satellite nodes participated in the planning of same scene, although it follows unified link order, its link setup planning table of each specific satellite node and routing table are different.
Due to the half-duplex characteristic of time division multiple access access Spatial distributions network, for each node in this network, the network node be connected with it in the specific time only has one, namely there will not be a node interior situation about being connected with two or more nodes at one time.According to the These characteristics of time division multiple access access Spatial distributions network, minimum hardware costs can be adopted, realize transmittability between simulation full constellation node star, thus the real satellite node for having existed, a kind of complete network protocol testing means are provided.
For the satellite possessing data-handling capacity and signal emissivities, no matter its on ground still stage in-orbit, fully test complete all need whether possess Constellation Network data transmission capabilities to it.
After single satellier injection, before full constellation satellite is not entered the orbit, namely before satellite does not complete networking, how carrying out test fully to corresponding network data transfer protocol is an important problem.
In test process, there is the requirement that some are special.The state of first tested satellite must be consistent with normal operating condition, comprises software and hardware state.This just needs to explore new experimental technique and demo plant, for a satellite node of time division multiple access access Spatial distributions network, in the ground test stage with whether the stage possesses procotol disposal ability to satellite, whether possesses networking capability and comprehensively test in-orbit.Due to the network that time division multiple access access Spatial distributions network is a kind of innovation, also without any the method for testing the transfer of data based on time division multiple access access Spatial distributions network in current document.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of data transmission testing method based on time division multiple access access Spatial distributions network, in ground test stage and satellite stage in-orbit, and test time division multiple access access Spatial distributions network of network status transmission.
Technical scheme of the present invention is:
According to the feature of time division multiple access access Spatial distributions network, a set of equipment realizes the network data transmission characteristic of multi-satellite, this complete equipment, for testing satellite, in ground test stage or stage in-orbit, does not change the normal operating conditions of satellite.
The concrete steps of the method are:
The first step: build a test environment:
Test environment is made up of network data half object test device and tested satellite (being called for short tested satellite).Tested satellite has ground test and Orbital detection two states, completely the same when the state of tested satellite and normal operation, tested satellite is connected by data transmission link or management control link with network data half object test device, transmit time division multiple access by data transmission link and access various test datas in Spatial distributions network, test data refers to N number of virtual satellite and tested intersatellite link Network analogue data, observation data, remote control, telemetry between constellation orbital and star.The transmission of management control link is normal runs necessary secondary parameter information, comprises: link setup planning table, routing table, link setup initiate joint movements track, destination node (link-attached node) tracks, system time.In order to ensure the correctness of test result, require that the state of tested satellite when adopting network data half physical varification device to test is completely the same with the state in-orbit of this satellite.
The virtual satellite of tested satellite and network data half object test unit simulation forms a time division multiple access access Spatial distributions network jointly, each satellite participating in test, comprise tested satellite and virtual satellite, all form a node of time division multiple access access Spatial distributions network, each node can receive data, send data, namely as sending node and receiving node.Suppose that the quantity of virtual satellite node is N, the number of nodes of this time division multiple access access Spatial distributions network is N+1.Virtual satellite refer to by network data half object test unit simulation complete time division multiple access access Spatial distributions network data transmission function time and the identical satellite of real satellite function.These virtual satellites are together with tested satellite, node in common composition time division multiple access access Spatial distributions network, be called virtual satellite node and tested satellite node, the data-transformation facility of these two kinds of nodes in time division multiple access access Spatial distributions network is identical, and just the location of node is different.
Hardware on tested satellite is divided into satellite RF subsystem and satellite control subsystem, is connected between satellite control subsystem and satellite RF subsystem by data/address bus.Spaceborne computer in satellite control subsystem is provided with link setup and points to software, communication protocol stack process software.Satellite RF subsystem is modulated the data in time division multiple access access Spatial distributions network, digital-to-analogue conversion, frequency up-conversion operation, by antenna by the emission of radio frequency signals after modulation.Passing of satelline satellite RF subsystem is connected with network data half physical varification device.
The link setup of tested satellite points to software calculates current time slots satellite RF subsystem link setup sensing according to the secondary parameter information obtained from network data half object test device.Because the radio frequency beam of time division multiple access access Spatial distributions network is narrow beam, and node (comprise link setup and initiate node and the destination node) direction of motion in time division multiple access access Spatial distributions network can be predicted, therefore, joint movements track can be initiated by link setup, destination node tracks, current time, calculate current time slots satellite RF subsystem link setup point to (circular is shown in document: Liang Junming, the design studies of satellite communication system inter-satellite link, 2006, National University of Defense Technology's Master's thesis, 3.1.2 the track of satellite on celestial sphere is saved, P16-P17), the link setup time can be shortened like this, increase link setup efficiency.
The communication protocol stack process software of tested satellite is 201510004471.4 patents of invention according to application number: a kind of data transmission method accessed based on time division multiple access in the reliable data transmission method of Spatial distributions network described in the 4th step carries out data receiver, forwarding and transmission.
Network data half object test device is the device tested tested satellite transit time division multiple access access Spatial distributions network data transmission mode correctness, be made up of testing apparatus Radio Frequency Subsystem and testing apparatus control subsystem, connected by data/address bus between testing apparatus control subsystem and testing apparatus Radio Frequency Subsystem.Testing apparatus control subsystem produces software, test data interactive controlling software, virtual satellite communication protocol stack process software, test event Performance Analysis Software, time synchronized software, test configurations by supervision test software, test configurations and planning software, test data and planning software parameter configuration files, test data produce software parameter configuration file, supervision test software parameter configuration files forms.
Testing apparatus Radio Frequency Subsystem is the same with satellite RF subsystem structure, be responsible for that the data accessed in Spatial distributions network by time division multiple access carry out modulating, digital-to-analogue conversion, frequency up-conversion operation, by antenna, the emission of radio frequency signals after modulation is gone out.Testing apparatus Radio Frequency Subsystem is connected by wireless link with tested satellite RF subsystem.
Test configurations and planning software parameter configuration files have 1,2 territories.Be respectively:
1) the virtual satellite quantity of testing: the concrete quantity namely forming time division multiple access access Spatial distributions network node, the i.e. numerical value of N;
2) the virtual satellite numbering of test is participated in: the concrete virtual satellite numbering participating in test.
Test data produces software parameter configuration file has Q item, wherein Q≤N × (N-1)/2, and each has 6 territories, is respectively:
1) sending node of data: the start node of test data transmission;
2) receiving node of data: the destination node of test data transmission;
3) data class: remote-control data or telemetry;
4) number of data frames: the test data number of frames of transmission, in units of Frame;
5) send priority: the number between 0-15,15 priority are the highest;
6) whether retransmit: 0 for retransmitting, and 1 for not retransmit;
Supervision test software parameter configuration files totally 1,3 territories, are respectively:
1) in-orbit whether tested satellite: be 0 in-orbit, is not 1 in-orbit;
2) tested satellite orbit: the track of tested satellite;
3) position of network data half object test device: the physical coordinates of network data half object test device.
Test configurations and planning software carry out test configurations and mission planning to the test scene of tested satellite.Test configurations and planning software determine the virtual satellite quantity N that participates in testing and numbering according to test configurations and planning software parameter configuration files, with tested satellite together, generate link setup planning table, routing table, test mode allocation list, link setup planning table, routing table, test mode allocation list are sent to supervision test software.Although follow same sequential annexation, the link setup planning table of each virtual satellite and routing table are different, and testing results configuration all generates the link setup planning table corresponding with this virtual satellite and routing table to planning software to the virtual satellite that each participates in testing.The time division multiple access that simultaneously generates test configurations and planning software access Spatial distributions nodes perfect condition information (namely test configurations and planning software each node of deducing out according to the flow process of virtual satellite communication protocol stack process software different time slots test data kind, quantity, reception data bulk, send the information such as data bulk, forwarding data quantity), and node perfect condition information is exported to supervision test software.
Test data produces software and produces test data according to test data generation software parameter configuration file (having 6 territories), and test data is sent to supervision test software.
The link setup planning table of the virtual satellite received from test configurations and planning software, routing table, test mode allocation list are issued to test data interactive controlling software by supervision test software, by the link setup planning table of tested satellite and routing table by Satellite Management link being noted (upper note: data are transported to satellite by radio channel by satellite ground equipment) to tested satellite.The node perfect condition information received from test configurations and planning software is sent to test event Performance Evaluation and analysis software.
Supervision test software distributes independently memory block for each virtual satellite, namely distributes N number of memory block.
Each virtual satellite node data buffering area, according to the time-gap number in link setup planning table, stores the reception data of each node, sends data, forwarding data, when node receives data, claims node to be in accepting state; When node sends data, node is claimed to be in transmission state; When node for data forwarding, node is claimed to be in forwarding state.
According to supervision test software parameter configuration files, supervision test software determines whether in-orbit tested satellite, if in-orbit, calculate " virtual sensing star " track, otherwise do not calculate." virtual sensing star " is present on the extended line of tested satellite and network data half object test device connecting line, and and tested satellite divide and be in earth two ends, when tested satellite points to " virtual sensing star ", link is blocked by the earth certainly, the network data half object test device being physically located in the sensing of its link receives wireless signal, and sets up wireless link with tested satellite.The reason calculating " virtual sensing star " track is that tested satellite needs link setup planning table and the satellite orbit prestored to carry out link and points to calculating, in order to prevent the sensing of tested satellite aerial and non-existent virtual satellite node, can, under this tests scene, " virtual sensing star " track be all used to substitute all virtual satellite node orbital datas participating in test.The tested satellite orbit obtained from outside is noted to tested satellite by management control link by supervision test software together with " virtual sensing star " track.
Test data interactive controlling software distributes the test data received from supervision test software and transmits between network data half object test device and tested satellite, and test data is stored, for virtual satellite communication protocol stack process software.Test data interactive controlling software is according to the link setup planning table of the test mode allocation list received from supervision test software, each virtual satellite and the annexation between routing table determination virtual satellite node and tested satellite and data transmission relations; The test data that the virtual satellite node run in network data half object test device sends is sent to tested satellite; Receive the test data that tested satellite sends simultaneously.In test data interactive controlling software collection test process, each node is in test data kind, quantity, reception data bulk, the information such as transmission data bulk, forwarding data quantity etc. of different time slots, form node virtual condition information, node virtual condition information is sent to supervision test software.Node virtual condition information is sent to test event Performance Evaluation software by supervision test software.
The data buffer zone that virtual satellite communication protocol stack process software is different to each virtual satellite node maintenance, the order of connection determined according to link setup planning table and routing table and data transmitting channel receive the test data that a upper connected node sends and test data are sent to next connected node, ensure that virtual satellite node is consistent with tested satellite in data protocol execution.
Test event Performance Evaluation and analysis software are to the overall test Performance Evaluation of tested satellite and analysis.The node perfect condition information node virtual condition information that test performance evaluation and analysis software receives from supervision test software.Each virtual satellite node state, node perfect condition information are contrasted, conclusion is provided to the data transmission capabilities whether tested satellite possesses based on time division multiple access access Spatial distributions network.
Time synchronized software provides unified time slot for each software participating in test, keeps the time synchronized between each hardware-software.
Second step: testing apparatus control subsystem carries out test configurations and mission planning to the test scene of tested satellite, and method is:
2.1 test configurations and planning software determine according to test configurations and planning software parameter configuration files the quantity N and the virtual satellite quantity that participate in the virtual satellite that this is tested.
2.2 test configurations and planning software adopt the computational methods in patent the 3rd step of application number 201510004471.4 described in 3.1 steps, for test scene, linking relationship between satellite and data transfer path is calculated according to satellite orbit, build link setup planning table, routing table, and build test mode allocation list according to virtual satellite quantity, numbering, annexation.Test mode allocation list defines the simulation type of network data half object test device in particular moment, strict corresponding relation is had with link setup planning table, routing table, determine state when network data half object test device radio frequency sends, be made up of gauge outfit and table body.
Gauge outfit is made up of initial time and end time two territories, and initial time refers to that the moment that test mode allocation list comes into force, end time refer to the moment that affiliated test mode allocation list lost efficacy.
Table body has P item, P=(end time-initial time)/time slot, and namely link setup planning table length effective time is P time slot.Table body is made up of 5 territories, and 5 territories are respectively time-gap number, the simulation node number of current time slots, the reiving/transmitting state of current time slots, link data rates, link code mode.Time slot refers to the time period between initial time and end time.Table the bodily form as:
1) time-gap number: be initial with 1, order increases, and maximum is P.
2) simulation node number: the virtual satellite numbering that network data half object test device emulates at this time slot.
3) reiving/transmitting state: the virtual satellite node corresponding to virtual satellite numbering, in the state of this time slot, has and receives and send two states.
4) link data rates: virtual satellite and message transmission rate corresponding to tested satellite RF link.
5) link code mode: virtual satellite and modulation coding mode corresponding to tested satellite RF link.
2.3 test configurations and planning software according to the handling process of virtual satellite communication protocol stack process software deduce out each node different time slots test data kind, quantity, reception data bulk, send the information such as data bulk, forwarding data quantity, generate node perfect condition information, node perfect condition information is sent to supervision test software.
Test mode allocation list, link setup planning table, routing table, node perfect condition information are exported to supervision test software by 2.4 test configurations and planning software.
3rd step: test data produces software and produces test data:
3.1 test datas produce softwares and produce software parameter configuration file from test data and read the sending node of data, receiving node, data class, number of data frames, transmission priority, whether retransmission parameter.
3.2 test datas produce software and produce according to test data the test data that software parameter configuration file produces N number of virtual satellite and tested satellite node, and test data is stored in test data file.
3.3 test datas produce software and test data file are sent to supervision test software by data/address bus.
4th step: according to " the whether in-orbit tested satellite " territory in supervision test software parameter configuration files, supervision test software judges whether in-orbit tested satellite, if in-orbit, perform the 5th step (needing to calculate link setup in-orbit to point to), otherwise perform the 6th step (not needing to calculate link setup time not in-orbit to point to).
5th step: supervision test software calculates " virtual sensing star " orbital data.
5.1 supervision test softwares read tested satellite orbit from supervision test software parameter configuration files.
5.2 supervision test softwares read the position of network data half object test device from supervision test software parameter configuration files.
5.3 supervision test softwares calculate " virtual sensing star " orbital data, and method is: the position calculation according to tested satellite orbit and network data half object test device goes out the sensing of tested satellite link setup; The extended line pointed to according to link setup again calculates the position of " virtual sensing star " and simulates " virtual sensing star " track.
" virtual sensing star " track is sent to tested satellite by management control link by 5.4 supervision test softwares.
6th step: other software in supervision test software distributing data file to network data half object test device.
The link setup planning table of test mode allocation list, virtual satellite and routing table, test data file are sent to test data interactive controlling software by data/address bus by 6.1 supervision test softwares;
6.2 supervision test softwares according to the virtual satellite quantity N taken one's test, in testing apparatus control subsystem for each virtual satellite distributes independently memory block (size is arranged according to P × M × every frame byte number, and unit is byte); A rf data process buffering area (size is arranged according to N × P × M × every frame byte number, and unit is byte) is set at testing apparatus Radio Frequency Subsystem simultaneously, sends relevant test data in order to process with radio frequency.M is the maximum data frame number of every slot transmission.
The link setup planning table of tested satellite, routing table, tested satellite orbit are sent to tested satellite by management control link by 6.3 supervision test softwares.
Node perfect condition information is sent to test performance analysis and assessment software by 6.4 supervision test softwares.
7th step: the time synchronized software of network data half object test device provides time beat, keeps star ground time synchronized.
7.1 time synchronized softwares obtain UTC (Coordinated Universal Time Coordinated Universal Time(UTC), UTC is the abbreviation of the French) time that outside sends.
The UTC time is broadcast other software of tested satellite and network data half object test device by 7.2 time synchronized softwares, ensure tested satellite and network data half object test setup time synchronous, thus ensure that the software time that each software of operating in network data half object test device and tested satellite run is synchronous, and provide the time slot set up required for beat.
8th step: network data half object test device carries out interactive controlling to the virtual satellite in network data half object test device and tested satellite:
Test data interactive controlling software is according to test mode allocation list, link setup planning table and routing table, according to the time slot that time synchronized software provides, determine that each time slot and tested satellite have the virtual satellite node of linking relationship, the data before and after the process of storing virtual satellite communication protocols stack process software.The link setup planning table of each virtual satellite node reading oneself and routing table, be connected with tested satellite successively.Due to time division multiple access access Spatial distributions network, although have N virtual satellite in network data half object test device, a certain particular moment be connected with tested satellite only have a virtual satellite, be referred to as current virtual satellite.
8.1 test data interactive controlling softwares read the time slot that time synchronized software provides.
According to " simulation node number " item of test mode allocation list, 8.2 test data interactive controlling softwares determine that this time slot and tested satellite node have the virtual satellite node of linking relationship.
8.3 test data interactive controlling softwares read link setup planning table and the routing table of current virtual satellite node, determine the annexation between virtual satellite node and tested satellite and data transmission relations; Test data interactive controlling software is according to " simulation node number " of test mode allocation list, in the test data that the 3rd step produces, determine the test data that current virtual satellite node sends as sending node, current virtual satellite node refers to the virtual satellite be connected with tested satellite in a certain particular moment;
8.4 virtual satellite communication protocol stack process softwares press the reliable data transmission method first step of number of patent application 201510004471.4 1 kinds based on time division multiple access access Spatial distributions network to the transmission method reception described in the 4th step, transmission or transmitted test data, and the test data needing to send are sent to the test data interactive controlling software of network data half object test device by internal bus.
8.5 supervision test softwares by the transmission data distributing of current virtual satellite node to testing apparatus Radio Frequency Subsystem.
8.6 testing apparatus Radio Frequency Subsystems, by after the test data modulation that needs to send, are set up link in the mode of radiofrequency signal by antenna or wired mode and tested satellite, the transmission data of current virtual satellite node are sent to tested satellite.
Node virtual condition information is sent to supervision test software by 8.7 test data interactive controlling softwares.
Node virtual condition information is sent to test performance evaluation and analysis software by 8.8 supervision test softwares.
9th step: the link setup of tested satellite points to software and reads link setup planning table and routing table, determine the destination node that each time slot connects, and according to tested satellite orbit, (computational methods are shown in Liang Junming with the sensing of " virtual sensing star " ephemeris computation link, the design studies of satellite communication system inter-satellite link, 2006, National University of Defense Technology's Master's thesis, 3.1.2 saves the track of satellite on celestial sphere, P16-P17); Satellite communication protocols stack process software points to data, the data of this node forwarding, the data of this node reception determining this node and send according to ephemeris computation link.And data are sent to satellite RF subsystem, by Radio Frequency Subsystem, data are sent to network data half object test device.
Tenth step: test performance evaluation and analysis software carries out test performance evaluation and analysis to the transfer of data of tested satellite in time division multiple access access Spatial distributions network.
Test performance evaluation and analysis software reads node perfect condition information, node virtual condition information, the virtual condition information of each node and perfect condition information in more same time slot; If have the virtual condition information of any one node and perfect condition information inconsistent, can judge that tested satellite TDMA access Spatial distributions data transmission in network is incorrect; If the virtual condition information of all nodes and perfect condition information completely the same, can judge that tested satellite TDMA access Spatial distributions data transmission in network is correct, and show that tested satellite accesses the correct conclusion of Spatial distributions data transmission in network in time division multiple access.
Adopt the present invention can reach following technique effect:
1, for the single satellite node added in time division multiple access access Spatial distributions network, use the present invention to test, a set of hardware device can realize the satellite data transmission protocol test under multinode condition.
The time division multiple access access Spatial distributions network of network test transmission in 2, can be implemented in ground test stage and satellite stage in-orbit.
3, by judging the virtual satellite node state be connected with tested satellite, can at satellite under the prerequisite not changing oneself state, complete time division multiple access access Spatial distributions network of network protocol test, and determine that tested satellite performs the correctness of time division multiple access access Spatial distributions network of network agreement.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the test environment that the first step of the present invention builds;
Fig. 2 is the physical structure schematic diagram of network data half object test device in test environment of the present invention;
Fig. 3 is the data flow figure of each software in network data half object test device in test environment of the present invention;
Fig. 4 is the physical structure schematic diagram of tested satellite;
Fig. 5 is overall flow figure of the present invention;
Fig. 6 is the virtual sensing star principle schematic described in the first step of the present invention.
Embodiment
Below with reference to specific embodiment and Figure of description, the present invention is described in further details.
Fig. 1 is the schematic diagram of the test environment that the first step of the present invention builds;
Participate in based on time division multiple access access Spatial distributions network data transmission test have tested satellite and network data half object test device.The virtual satellite of tested satellite and network data half object test unit simulation forms a time division multiple access access Spatial distributions network jointly, each satellite participating in test, comprise tested satellite and virtual satellite, all form a node of time division multiple access access Spatial distributions network, virtual satellite is called virtual satellite node, tested satellite is called tested satellite node, the data-transformation facility of these two kinds of nodes in time division multiple access access Spatial distributions network is identical, and just the location of node is different.Each node can receive data, send data, namely as sending node and receiving node.Suppose that the quantity of virtual satellite node is N, the number of nodes of this time division multiple access access Spatial distributions network is N+1.Virtual satellite refer to by network data half object test unit simulation complete time division multiple access access Spatial distributions network data transmission function time and the identical satellite of real satellite function.
Fig. 2 is the physical structure of network data half object test device
Network data half object test device hardware is divided into Radio Frequency Subsystem and control subsystem, and the computer for controlling wherein in control subsystem is provided with testing results configuration and produces software, test data interactive controlling software, test event Performance Evaluation and analysis software, time synchronized software, supervision test software, virtual satellite communication protocol stack process software with planning software, test data.Connected by data/address bus between testing apparatus control subsystem and testing apparatus Radio Frequency Subsystem.
Fig. 3 is the data flow figure of each software in network data half object test device
Test configurations and planning software carry out test configurations and mission planning to the test scene of tested satellite.Test configurations and planning software determine the virtual satellite quantity N that participates in testing and numbering according to test configurations and planning software parameter configuration files, with tested satellite together, generate link setup planning table, routing table, test mode allocation list, and link setup planning table, routing table, test mode allocation list are sent to supervision test software.The time division multiple access that simultaneously generates test configurations and planning software accesses Spatial distributions nodes perfect condition information, and perfect condition information is exported to supervision test software.
Test data produces software and produces test data, and test data produces software and produces the indispensable time division multiple access access Spatial distributions network testing data of software parameter configuration file generation test according to test data, and test data is sent to supervision test software.
The link setup planning table of the virtual satellite received from test configurations and planning software, routing table, test mode allocation list are issued to test data interactive controlling software by supervision test software, the link setup planning table of tested satellite and routing table are noted to tested satellite by Satellite Management link.The node perfect condition information received from test configurations and planning software is sent to test event Performance Evaluation and analysis software.
Supervision test software according to the virtual satellite quantity taken one's test for each virtual satellite distributes independently memory block.
According to supervision test software parameter configuration files, supervision test software determines whether in-orbit tested satellite, if in-orbit, calculate " virtual sensing star " track, otherwise do not calculate.Supervision test software obtains tested satellite orbit (known) from outside and " virtual sensing star " track is noted to tested satellite by management control link together.
Test data interactive controlling software distributes the test data received from supervision test software and transmits between network data half object test device and tested satellite, and test data is stored, for virtual satellite communication protocol stack process software.Test data interactive controlling software is according to the link setup planning table of the test mode allocation list received from supervision test software, each virtual satellite and the annexation between routing table determination virtual satellite node and tested satellite and data transmission relations; The test data that the virtual satellite node run in network data half object test device sends is sent to tested satellite simultaneously; Receive the test data that tested satellite sends simultaneously.Test data interactive controlling software is by node virtual condition information, namely in test process each node at the test data kind of different time slots, quantity, reception data bulk, send the information such as data bulk, forwarding data quantity, be sent to supervision test software, node virtual condition information is sent to test event Performance Evaluation and analysis software by supervision test software.
The data buffer zone that virtual satellite communication protocol stack process software is different to each virtual satellite node maintenance, the order of connection determined according to link setup planning table core road sign and data transmitting channel receive the test data that a upper connected node sends and test data are sent to next connected node, ensure that virtual satellite node is consistent with tested satellite in data protocol execution.
Test event Performance Evaluation and analysis software are to the overall test Performance Evaluation of tested satellite and analysis.The node perfect condition information that test performance evaluation and analysis software receives from test configurations and planning software, from the test data of test data interactive controlling software, obtain each virtual satellite node virtual condition from virtual satellite communication protocol stack process software, each node namely after the process of virtual satellite communication protocol stack process software is in test data kind, quantity, reception data bulk, the information such as transmission data bulk, forwarding data quantity etc. of different time slots.Each virtual satellite node virtual condition and node perfect condition information are contrasted, the overall test performance of tested satellite is analyzed, conclusion is provided to the data transmission capabilities whether tested satellite possesses based on time division multiple access access Spatial distributions network.
Time synchronized software provides unified time slot for each software participating in test, keeps the time synchronized between each hardware-software.
Fig. 4 is the physical structure of tested satellite.
Hardware on tested satellite is divided into satellite RF subsystem and satellite control subsystem, is connected between satellite control subsystem and satellite RF subsystem by data/address bus.Spaceborne computer in satellite control subsystem is provided with link setup and points to software, communication protocol stack process software.Satellite RF subsystem is modulated the data in time division multiple access access Spatial distributions network, digital-to-analogue conversion, frequency up-conversion operation, by antenna by the emission of radio frequency signals after modulation.Passing of satelline satellite RF subsystem is connected with network data half physical varification device.
Fig. 5 is overall flow figure of the present invention
Handling process of the present invention is:
The first step: build a test environment.
Second step: testing apparatus control subsystem carries out test configurations and mission planning to the test scene of tested satellite.
3rd step: test data produces that software produces N number of virtual satellite and tested intersatellite link Network analogue data, the test data such as observation data between constellation orbital and star.
4th step: according to " the whether in-orbit tested satellite " territory in supervision test software parameter configuration files, supervision test software judges whether in-orbit tested satellite, if in-orbit, performs the 5th step, otherwise performs the 6th step.
5th step: supervision test software calculates " virtual sensing star " orbital data.6th step: other software in supervision test software distributing data file to network data half object test device.
7th step: the time synchronized software of network data half object test device provides time beat, keeps star ground time synchronized.
8th step: the test data interactive controlling software of network data half object test device carries out interactive controlling to the virtual satellite in network data half object test device and tested satellite.
9th step: tested satellite determination destination node, calculates link and points to, and determines that this node sends, forwards, receives data, and by Radio Frequency Subsystem, data are sent to network data half object test device.
Tenth step: test performance evaluation and analysis software carries out test performance evaluation and analysis to the transfer of data of tested satellite in time division multiple access access Spatial distributions network.
Fig. 6 is the virtual directive property principle schematic of the present invention the 4th step;
Under test scene of the present invention, only has tested satellite in-orbit, the normal program operation of tested satellite, therefore, if do not changed the link setup target satellite ephemeris that satellite stores, then there is not actual satellite in the orientation of satellite aerial directing, and tested satellite cannot complete the test of network performance, therefore needs all virtual satellite node orbital datas participating in test all to use " virtual sensing star " track to substitute.This " virtual sensing star " is present on the extended line of tested satellite and network data half object test device connecting line, and and tested satellite divide and be in earth two ends, that is, when tested satellite points to " virtual sensing star ", link is blocked by the earth certainly, the network data half object test device being physically located in the sensing of its link receives wireless signal, and sets up wireless link with tested satellite." virtual sensing star " orbital data needs to be stored in before test mission starts on tested satellite.
Claims (9)
1., based on a data transmission testing method for time division multiple access access Spatial distributions network, it is characterized in that comprising the following steps:
The first step: build a test environment:
Test environment is made up of network data half object test device and tested satellite, tested satellite is connected by data transmission link or management control link with network data half object test device, various test datas in data transmission link transmission time division multiple access access Spatial distributions network, management control link transmission secondary parameter information; The state of tested satellite when adopting network data half physical varification device to test is completely the same with the state in-orbit of this satellite;
The virtual satellite of tested satellite and network data half object test unit simulation forms a time division multiple access access Spatial distributions network jointly, the tested satellite of each participation test and virtual satellite form the node in time division multiple access access Spatial distributions network jointly, be called tested satellite node and virtual satellite node, the data-transformation facility of these two kinds of nodes in time division multiple access access Spatial distributions network is identical, and just the location of node is different; Virtual satellite refer to by network data half object test unit simulation complete time division multiple access access Spatial distributions network data transmission function time and the identical satellite of real satellite function; The quantity of the number of nodes of time division multiple access access Spatial distributions network to be N+1, N be virtual satellite node;
Hardware on tested satellite is divided into satellite RF subsystem and satellite control subsystem, is connected between satellite control subsystem and satellite RF subsystem by data/address bus; Spaceborne computer in satellite control subsystem is provided with link setup and points to software, communication protocol stack process software; Satellite RF subsystem is modulated the data in time division multiple access access Spatial distributions network, digital-to-analogue conversion, frequency up-conversion operation, by antenna by the emission of radio frequency signals after modulation, tested passing of satelline satellite RF subsystem is connected with network data half physical varification device; The link setup of tested satellite points to software and initiates joint movements track, destination node tracks, current time according to the link setup in the secondary parameter information obtained from network data half object test device, and the link setup calculating current time slots satellite RF subsystem points to; The communication protocol stack process software of tested satellite receives test data, forwards and sends;
Network data half object test device is the device tested tested satellite transit time division multiple access access Spatial distributions network data transmission mode correctness, be made up of testing apparatus Radio Frequency Subsystem and testing apparatus control subsystem, connected by data/address bus between testing apparatus control subsystem and testing apparatus Radio Frequency Subsystem; Testing apparatus control subsystem produces software, test data interactive controlling software, virtual satellite communication protocol stack process software, test event Performance Analysis Software, time synchronized software, test configurations by supervision test software, test configurations and planning software, test data and planning software parameter configuration files, test data produce software parameter configuration file, supervision test software parameter configuration files forms.
Testing apparatus Radio Frequency Subsystem is the same with satellite RF subsystem structure, be responsible for that the data accessed in Spatial distributions network by time division multiple access carry out modulating, digital-to-analogue conversion, frequency up-conversion operation, by antenna, the emission of radio frequency signals after modulation is gone out; Testing apparatus Radio Frequency Subsystem is connected by wireless link with tested satellite RF subsystem;
Test configurations and planning software parameter configuration files have 1,2 territories, are respectively the virtual satellite quantity of test, participate in the virtual satellite numbering of test;
Test data produces software parameter configuration file has Q item, wherein Q≤N × (N-1)/2, and each has 6 territories, be respectively the sending node of data, data receiving node, data class, number of data frames, transmission priority, whether retransmit;
Supervision test software parameter configuration files totally 1,3 territories, be respectively tested satellite whether in-orbit, the position of tested satellite orbit, network data half object test device;
Test configurations and planning software determine the virtual satellite quantity N that participates in testing and numbering according to test configurations and planning software parameter configuration files, with tested satellite together, generate link setup planning table, routing table, test mode allocation list, link setup planning table, routing table, test mode allocation list are sent to supervision test software; The time division multiple access that simultaneously generates test configurations and planning software accesses Spatial distributions nodes perfect condition information, and node perfect condition information is exported to supervision test software, described perfect condition information refer to each node that test configurations and planning software deduce out according to the flow process of virtual satellite communication protocol stack process software different time slots test data kind, quantity, reception data bulk, send data bulk, forwarding data quantity;
Test data produces software and produces software parameter configuration file generation test data according to test data, and test data is sent to supervision test software;
The link setup planning table of the virtual satellite received from test configurations and planning software, routing table, test mode allocation list are issued to test data interactive controlling software by supervision test software, the node perfect condition information received from test configurations and planning software to tested satellite, is sent to test event Performance Evaluation and analysis software by note on Satellite Management link by the link setup planning table of tested satellite and routing table;
Supervision test software distributes independently memory block for each virtual satellite; Each virtual satellite node data buffering area, according to the time-gap number in link setup planning table, stores the reception data of each node, sends data, forwarding data, when node receives data, claims node to be in accepting state; When node sends data, node is claimed to be in transmission state; When node for data forwarding, node is claimed to be in forwarding state;
According to supervision test software parameter configuration files, supervision test software determines whether in-orbit tested satellite, if in-orbit, calculate " virtual sensing star " track, otherwise do not calculate; " virtual sensing star " is present on the extended line of tested satellite and network data half object test device connecting line, and and tested satellite divide and be in earth two ends, when tested satellite points to " virtual sensing star ", link is blocked by the earth, the network data half object test device being physically located in the sensing of its link receives wireless signal, and sets up wireless link with tested satellite; The tested satellite orbit obtained from outside is noted to tested satellite by management control link by supervision test software together with " virtual sensing star " track;
Test data interactive controlling software distributes the test data received from supervision test software and transmits between network data half object test device and tested satellite, and test data is stored, for virtual satellite communication protocol stack process software; Test data interactive controlling software is according to the link setup planning table of the test mode allocation list received from supervision test software, each virtual satellite and the annexation between routing table determination virtual satellite node and tested satellite and data transmission relations; And the test data that the virtual satellite node run in network data half object test device sends is sent to tested satellite, receive the test data that tested satellite sends simultaneously; Test data interactive controlling software collect each node in test process different time slots test data kind, quantity, reception data bulk, send data bulk, these information of forwarding data quantity, form node virtual condition information, node virtual condition information is sent to supervision test software, and node virtual condition information is sent to test event Performance Evaluation software by supervision test software;
The data buffer zone that virtual satellite communication protocol stack process software is different to each virtual satellite node maintenance, the order of connection determined according to link setup planning table and routing table and data transmitting channel receive the test data that a upper connected node sends and test data are sent to next connected node, ensure that virtual satellite node is consistent with tested satellite in data protocol execution;
Test event Performance Evaluation and analysis software are to the overall test Performance Evaluation of tested satellite and analysis, the node perfect condition information that test performance evaluation and analysis software receives from test configurations and planning software, from the test data of test data interactive controlling software, obtain each virtual satellite node virtual condition from virtual satellite communication protocol stack process software; Each virtual satellite node state, test data and node perfect condition information are contrasted, conclusion is provided to the data transmission capabilities whether tested satellite possesses based on time division multiple access access Spatial distributions network;
Time synchronized software provides unified time slot for each software participating in test, keeps the time synchronized between each hardware-software;
Second step: testing apparatus control subsystem carries out test configurations and mission planning to the test scene of tested satellite, and method is:
2.1 test configurations and planning software are determined to participate in the quantity N of the virtual satellite that this is tested and the numbering of virtual satellite according to test configurations and planning software parameter configuration files;
2.2 test configurations and planning software are for testing scene, linking relationship between satellite and data transfer path is calculated according to satellite orbit, build link setup planning table, routing table, and build test mode allocation list according to virtual satellite quantity, numbering, annexation; Test mode allocation list is made up of gauge outfit and table body: gauge outfit is made up of initial time and end time two territories, and initial time refers to that the moment that test mode allocation list comes into force, end time refer to the moment that affiliated test mode allocation list lost efficacy; Table body has P item, P=(end time-initial time)/time slot, and namely link setup planning table length effective time is P time slot; Table body is made up of 5 territories, and 5 territories are respectively time-gap number, the simulation node number of current time slots, the reiving/transmitting state of current time slots, link data rates, link code mode; Time slot refers to the time period between initial time and end time;
2.3 test configurations and planning software according to the flow process of virtual satellite communication protocol stack process software deduce out each node different time slots test data kind, quantity, reception data bulk, send the information such as data bulk, forwarding data quantity, generate node perfect condition information, node perfect condition information is sent to supervision test software;
Test mode allocation list, link setup planning table, routing table, node perfect condition information are exported to supervision test software by 2.4 test configurations and planning software; 3rd step: test data produces software and produces test data, and test data is sent to supervision test software;
4th step: according to " the whether in-orbit tested satellite " territory in supervision test software parameter configuration files, supervision test software judges whether in-orbit tested satellite, if in-orbit, performs the 5th step, otherwise performs the 6th step;
5th step: supervision test software calculates " virtual sensing star " orbital data, and " virtual sensing star " orbital data is sent to tested satellite;
6th step: other software in supervision test software distributing data file to network data half object test device:
The link setup planning table of test mode allocation list, virtual satellite and routing table, test data file are sent to test data interactive controlling software by data/address bus by 6.1 supervision test softwares;
6.2 supervision test softwares, according to the virtual satellite quantity N taken one's test, in testing apparatus control subsystem for each virtual satellite distributes independently memory block, arrange a rf data process buffering area at testing apparatus Radio Frequency Subsystem simultaneously;
The link setup planning table of tested satellite, routing table, tested satellite orbit are sent to tested satellite by management control link by 6.3 supervision test softwares;
Node perfect condition information is sent to test performance analysis and assessment software by 6.4 supervision test softwares;
7th step: the time synchronized software of network data half object test device provides time beat, keeps star ground time synchronized, and provides the time slot set up required for beat; 8th step: network data half object test device carries out interactive controlling to the virtual satellite in network data half object test device and tested satellite:
8.1 test data interactive controlling softwares read the time slot that time synchronized software provides;
According to " simulation node number " item of test mode allocation list, 8.2 test data interactive controlling softwares determine that this time slot and tested satellite node have the virtual satellite node of linking relationship;
8.3 test data interactive controlling softwares read link setup planning table and the routing table of current virtual satellite node, determine the annexation between virtual satellite node and tested satellite and data transmission relations; Test data interactive controlling software is according to " simulation node number " of test mode allocation list, in the test data that the 3rd step produces, determine the test data that current virtual satellite node sends as sending node, current virtual satellite node refers to the virtual satellite be connected with tested satellite in a certain particular moment;
8.4 virtual satellite communication protocol stack process softwares receptions, transmission or transmitted test data, and the test data needing to send is sent to the test data interactive controlling software of network data half object test device by internal bus;
8.5 supervision test softwares by the transmission data distributing of current virtual satellite node to testing apparatus Radio Frequency Subsystem;
8.6 testing apparatus Radio Frequency Subsystems, by after the test data modulation that needs to send, are set up link in the mode of radiofrequency signal by antenna or wired mode and tested satellite, the transmission data of current virtual satellite node are sent to tested satellite;
Node virtual condition information is sent to supervision test software by 8.7 test data interactive controlling softwares;
Node virtual condition information is sent to test performance evaluation and analysis software by 8.8 supervision test softwares;
9th step: the link setup of tested satellite points to software and reads link setup planning table and routing table, determines the destination node that each time slot connects, and points to according to tested satellite orbit and " virtual sensing star " ephemeris computation link; Satellite communication protocols stack process software points to data, the data of this node forwarding, the data of this node reception determining this node and send according to ephemeris computation link, and data are sent to satellite RF subsystem, by Radio Frequency Subsystem, data are sent to network data half object test device;
Tenth step: test performance evaluation and analysis software carries out test performance evaluation and analysis to the transfer of data of tested satellite in time division multiple access access Spatial distributions network: test performance evaluation and analysis software reads node perfect condition information, node virtual condition information, the virtual condition information of each node and perfect condition information in more same time slot; If have the virtual condition information of any one node and perfect condition information inconsistent, can judge that tested satellite TDMA access Spatial distributions data transmission in network is incorrect; If the virtual condition information of all nodes and perfect condition information completely the same, can judge that tested satellite TDMA access Spatial distributions data transmission in network is correct, and show that tested satellite accesses the correct conclusion of Spatial distributions data transmission in network in time division multiple access.
2. a kind of data transmission testing method based on time division multiple access access Spatial distributions network as claimed in claim 1, is characterized in that described test data refers to N number of virtual satellite and tested intersatellite link Network analogue data, observation data, remote control, telemetry between constellation orbital and star; Described secondary parameter information, secondary parameter information comprises: link setup planning table, routing table, link setup initiate joint movements track, destination node tracks, system time.
3. a kind of data transmission testing method based on time division multiple access access Spatial distributions network as claimed in claim 1, is characterized in that the numerical value of virtual satellite quantity and the N tested in test configurations described in the first step and planning software parameter configuration files; The sending node of the data that test data produces in software parameter configuration file refers to the start node that test data is transmitted, the receiving node of data refers to the destination node that test data is transmitted, data class refers to remote-control data or telemetry, number of data frames refers to the test data number of frames transmitted, in units of Frame, transmission priority is the number between 0-15, and 15 priority are the highest, whether retransmitting territory is that 0 expression retransmits, and is that 1 expression does not retransmit; The tested satellite of supervision test software parameter configuration files whether orbital be 0 expression in-orbit, be 1 expression not in-orbit, the position of network data half object test device refers to the physical coordinates of network data half object test device.
4. a kind of data transmission testing method based on time division multiple access access Spatial distributions network as claimed in claim 1, it is characterized in that the table bodily form of test mode allocation list described in second step as:
1) time-gap number: be initial with 1, order increases, and maximum is P;
2) simulation node number: the virtual satellite numbering that network data half object test device emulates at this time slot;
3) reiving/transmitting state: the virtual satellite node corresponding to virtual satellite numbering, in the state of this time slot, has and receives and send two states;
4) link data rates: virtual satellite and message transmission rate corresponding to tested satellite RF link;
5) link code mode: virtual satellite and modulation coding mode corresponding to tested satellite RF link.
5. a kind of data transmission testing method based on time division multiple access access Spatial distributions network as claimed in claim 1, it is characterized in that test data described in the 3rd step produces software and produces test data, and method test data being sent to supervision test software is:
3.1 test datas produce softwares and produce software parameter configuration file from test data and read the sending node of data, receiving node, data class, number of data frames, transmission priority, whether retransmission parameter;
3.2 test datas produce software and produce according to test data the test data that software parameter configuration file produces N number of virtual satellite and tested satellite node, and test data is stored in test data file;
3.3 test datas produce software and test data file are sent to supervision test software by data/address bus.
6. a kind of data transmission testing method based on time division multiple access access Spatial distributions network as claimed in claim 1, it is characterized in that supervision test software described in the 5th step calculates " virtual sensing star " orbital data, and the method " virtual sensing star " orbital data being sent to tested satellite is;
5.1 supervision test softwares read tested satellite orbit from supervision test software parameter configuration files;
5.2 supervision test softwares read the position of network data half object test device from supervision test software parameter configuration files;
5.3 supervision test softwares calculate " virtual sensing star " orbital data: the position calculation according to tested satellite orbit and network data half object test device goes out the sensing of tested satellite link setup; The extended line pointed to according to link setup again calculates the position of " virtual sensing star " and simulates " virtual sensing star " track;
" virtual sensing star " track is sent to tested satellite by management control link by 5.4 supervision test softwares.
7. a kind of data transmission testing method based on time division multiple access access Spatial distributions network as claimed in claim 1, it is characterized in that arranging according to P × M × every frame byte number for each virtual satellite distributes independently memory block size described in the 6.2nd step, unit is byte; The rf data process buffer size arranged at testing apparatus Radio Frequency Subsystem is arranged according to N × P × M × every frame byte number, and unit is byte, and M is the maximum data frame number of every slot transmission.
8. a kind of data transmission testing method based on time division multiple access access Spatial distributions network as claimed in claim 1, is characterized in that the time synchronized software of network data half object test device described in the 7th step provides the method for time beat to be:
7.1 time synchronized softwares obtain Coordinated Universal Time(UTC) that outside sends and UTC time;
The UTC time is broadcast other software of tested satellite and network data half object test device by 7.2 time synchronized softwares.
9. a kind of data transmission testing method based on time division multiple access access Spatial distributions network as claimed in claim 1, is characterized in that virtual satellite communication protocol stack process software described in the 8th step receives, send or transmitted test data adopt number of patent application 201510004471.4 1 kinds based on the reliable data transmission method first step of time division multiple access access Spatial distributions network to the transmission method described in the 4th step.
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