CN105611654A - Multi-hop networking transmission equipment applicable to multiple-connection marshalling of heavy-load locomotives - Google Patents
Multi-hop networking transmission equipment applicable to multiple-connection marshalling of heavy-load locomotives Download PDFInfo
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- CN105611654A CN105611654A CN201511005959.5A CN201511005959A CN105611654A CN 105611654 A CN105611654 A CN 105611654A CN 201511005959 A CN201511005959 A CN 201511005959A CN 105611654 A CN105611654 A CN 105611654A
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- transmission equipment
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- signal processor
- networking transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Abstract
The invention discloses multi-hop networking transmission equipment applicable to multiple-connection marshalling of heavy-load locomotives. The multi-hop networking transmission equipment comprises a bottom plate, a radio-frequency module, a field programmable gate array, a digital signal processor and a micro-processor, wherein the bottom plate is provided with a digital-to-analogue converter and an analogue-to-digital converter and used for realizing conversion and inter-layer connection between an analogue signal and a digital signal; the radio-frequency module is used for receiving and transmitting a radio-frequency signal; the field programmable gate array is used for realizing baseband processing of a physical layer based on orthogonal frequency division multiplexing and transmitting a processing result to the digital signal processor; the digital signal processor is used for performing resource scheduling, link maintenance, routing searching and routing maintenance according to the processing result; and the micro-processor is used for sending data to be transmitted to the digital signal processor and performing application plane management and network management. By means of the invention, automatic network formation for multiple-connection marshalling, automatic network maintenance, collision-free data transmission and robust networking under the condition of a sudden failure can be realized; the maneuverability and the availability for multiple-connection marshalling are improved; the marshalling efficiency is increased; and the reliability and the survivability for multiple-connection marshalling are ensured.
Description
Technical field
The present invention relates to the multi-hop transmission technical field of heavily binding group of heavy loading locomotive, relate in particular to a kind of being suitable forIn the multi-hop networking transmission equipment of heavily binding group of heavy loading locomotive.
Background technology
Along with the heavy loading of railway freight, only depend on the organizational systems of single locomotive traction train to have limitationProperty: the tractive force of single locomotive is not enough to the train of the larger marshalling of traction, and train marshalling list length lengthens in additionThe safety coefficient of rear train operation reduces. Therefore heavy haul railway adopts Multiple driver communications within the same train to start and grow up heavily loaded groupClose train and be the direction of development, first need to solve locomotive double heading marshalling and ask and start heavy-load combined trainTopic.
Locomotive double heading heavily joins and heavily joins at a distance by heavily joining apart from being divided into zero distance. Zero distance heavily joinsRefer to multiple locomotives directly to link together, between locomotive and locomotive, do not hang together other vehicles. Remote heavyConnection can be distributed power train by multiple locomotive networkings, makes train obtain better pulling figure and braking spyProperty.
The general employing of communication between multi-locomotive at present heavily joins cable and realizes, and this mode reliabilityHeight, but there is significant limitation: heavily join cable and break and damage because vibration is easy the in service of locomotiveBad, affect the reliability of transfer of data, be not especially suitable for remote locomotive double heading; In addition at vehicleConnect above and fixed-interlock cable or dismantled is all wasted time and energy, cause maintenance department labour's waveTake.
Adopt wireless mode to realize the networking of multimachine car, more wired heavy easy operating, need not dismantle heavily connectionLine, causes extensive concern gradually. Wireless heavy binding group can be utilized cellular network at present(GSM-R/WCDMA/LTE network etc.) or complete based on radio station. Based on the nothing of cellular networkLine heavily joins grouping method and depends on static infrastructure, is subject to such environmental effects larger, once base station occursFault, whole marshalling network will be paralysed. Wireless heavy linked method based on radio station adopts concentrated substantiallyThe networking of formula single-hop, is set up and communicates by letter respectively with each slave controller car by master control locomotive, and master control locomotive sends to be compiledGroup command, slave controller car carries out corresponding operating according to marshalling order. The hidden danger that this kind of mode exists is when mainWhen control locomotive breaks down, whole marshalling process all will be difficult to carry out.
Existing another kind of mode is based on Alley Oop communication mechanism, and master control locomotive is by space relay sideFormula travels through all slave controller vehicle radio data, thereby ensures the correctness of marshalling. What this mode adopted isCentralized multihop network, along with the increase of marshalling number of locomotives, jumping figure increases, the speed that realizes of this networkCan be very slow, once and a certain locomotive break down, whole marshalling process will be paralysed.
Summary of the invention
The object of the present invention is to provide a kind of multi-hop networking transmission that is applicable to heavily binding group of heavy loading locomotive to establishStandby, to realize efficient, the reliable communication between multi-locomotive.
For achieving the above object, the present invention adopts following technical proposals:
A multi-hop networking transmission equipment that is applicable to heavily binding group of heavy loading locomotive, comprising:
Base plate, is provided with digital to analog converter and analog-digital converter on described base plate, for realizing analog signalAnd conversion and interlayer between data signal are connected;
Radio-frequency module, is connected with described digital to analog converter and described analog-digital converter, for receiving and transmittingRadiofrequency signal;
Field programmable gate array, is connected with described digital to analog converter and described analog-digital converter, for realityThe now physical layer Base-Band Processing based on OFDM, and send result to Digital Signal ProcessingDevice;
Digital signal processor, is connected with described field programmable gate array, for tying according to described processingFruit carries out scheduling of resource, link maintenance, path finding and route maintenance;
Microprocessor, is connected with described digital signal processor, for the data of needs transmission are sent toDescribed digital signal processor, carries out application surface management and network management.
Preferably, described field programmable gate array provides interlayer scheduling interface, described interlayer scheduling interfaceBe connected with described digital signal processor by external memory interface.
Preferably, described digital signal processor provides primitive signaling interface and business datum interface, described inPrimitive signaling interface is connected with described microprocessor by HPI with described business datum interface.
Preferably, described radio-frequency module comprises AD9361 integrated chip and power amplifier.
Preferably, described digital to analog converter and described analog-digital converter adopt IF bandpass sampling structure.
Preferably, described field programmable gate array is for realizing the two of OFDM based on burstTo transmission Base-Band Processing.
Preferably, the long burst of described field programmable gate array support and two kinds of structures of short burst, described lengthBurst comprises 12 OFDM symbols, and for transmit data message, described short burst comprises 4OFDM symbol, for transmitting Data Control message.
Preferably, described microprocessor is the microprocessor based on Linux.
Preferably, the management of described application surface comprise that business datum access, priority are determined, subnet resolve withAnd multicast group maintenance, described network management comprises that display network topological sum shows the whole network distributing slot resources feelingsCondition.
Preferably, multiple indicator lamps are also set on described base plate, described indicator lamp comprise networking indicator lamp andNetworking indicator lamp.
The present invention has following beneficial effect:
The present invention passes through to adopt field programmable gate array, digital signal processor, microprocessor, and joinsClose radio-frequency module, digital to analog converter and analog-digital converter, formed multi-hop networking transmission equipment. Described in inciting somebody to actionMulti-hop networking transmission equipment is arranged on heavy loading locomotive, can realize the automatic one-tenth net, the network that reconnect marshallingAutomatically the robust networking in maintenance, collisionless transfer of data and catastrophic failure situation, effectively strengthens locomotiveThe mobility of heavily binding group and availability, improve marshalling efficiency, ensures the reliable of locomotive double heading marshalling simultaneouslyProperty and survivability.
Brief description of the drawings
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is the structural representation of the multi-hop networking transmission equipment that provides of the embodiment of the present invention.
Detailed description of the invention
In order to be illustrated more clearly in the present invention, below in conjunction with preferred embodiments and drawings, the present invention is done into oneThe explanation of step. Parts similar in accompanying drawing represent with identical Reference numeral. Those skilled in the artShould be appreciated that specifically described content is illustrative and nonrestrictive below, should not limit with thisProtection scope of the present invention.
Fig. 1 is the structural representation of the multi-hop networking transmission equipment that provides of the embodiment of the present invention, as Fig. 1Shown in, described multi-hop networking transmission equipment comprises:
Base plate 1, is provided with digital to analog converter (DAC) 11 and analog-digital converter (ADC) on base plate 112, be connected for conversion and the interlayer realized between analog signal and data signal;
Radio-frequency module 2, is connected with digital to analog converter 11 and analog-digital converter 12, for receiving and penetratingFrequently signal;
Field programmable gate array (FPGA) 3, is connected with digital to analog converter 11 and analog-digital converter 12,For realizing the physical layer Base-Band Processing based on OFDM (OFDM), and result is passedGive digital signal processor 4;
Digital signal processor (DSP) 4, is connected with field programmable gate array 3, described in basisResult is carried out scheduling of resource, link maintenance, path finding and route maintenance;
Microprocessor (ARM) 5, is connected with digital signal processor 4, for the data that needs are transmittedSend to digital signal processor 4, carry out application surface management and network management.
The workflow of the multi-hop networking transmission equipment that the above embodiment of the present invention provides is as follows:
Each heavy loading locomotive is all equipped with multiple multi-hop networking transmission equipments, the start of multi-hop networking transmission equipmentAfter, scanning channel, now:
1) when the signal power of exporting when radio-frequency module 2 is greater than the threshold value that analog-digital converter 12 arranges, rightSignal carries out analog-to-digital conversion, and obtains data signal, the numeral of obtaining through synchronous, smart synchronizing process slightlySignal is sent into and in field programmable gate array 3, is carried out Base-Band Processing, the processing of field programmable gate array 3Result is given digital signal processor 4, is that NCFG disappears if digital signal processor 4 identifies this signalBreath (NCFG message is sent by the node in network, for adjacent node provides the basic communication information,Node in network all should be broadcasted NCFG message according to certain way), obtain in this message and compriseThe information such as network number, device number, and by above-mentioned information cache in digital signal processor 4, continueWait for a period of time (can control by timer during this period of time), now:
101) if during this period of time receive again NCFG message and the network number comprising and device numberIdentical with network number and device number in the front NCFG message once receiving, by this device number correspondenceEquipment as the patronage equipment of self and send NENT message to it (NENT message is to be new nodeObtain synchronous, initialize, add network to provide); Patronage equipment through analog-to-digital conversion, thick synchronous,Essence synchronously realizes signal acquisition, and the signal obtaining is given digital signal processor 4 after Base-Band Processing, numberAfter word signal processor 4 identifies and is NENT message, obtain patronage device number information wherein, if withEquipment of itself number is consistent, and digital signal processor 4 generates networking License Info, and adds NCFG toIn message, send to networking locomotive; Networking locomotive receives after this message, the NCFG message of going on the air,Networking indicator lamp can be set on base plate 1, and the indicator lamp that now networks is bright, shows to network successfully;
102) disappear if during this period of time again do not receive NCFG message or received NCFGCease the information such as network number, device number still wherein comprising from front once different, now think and network unsuccessfully,The message that the last time can be received is deleted, and restarts scanning channel;
2), if equipment does not receive all the time any useful signal within a period of time, think in network and do not haveOther equipment, now equipment is using the device number of self as network number, and by network number, equipment of itself numberAdd in NCFG message, NCFG message is carried out to periodic broadcast, can on base plate 1, arrangeNetworking indicator lamp, now networking indicator lamp is bright, shows networking success.
After each multi-hop networking transmission equipment successfully networks, its digital signal processor 4 is safeguarded an informationTable, this information table comprise network number, equipment of itself number, neighbor device number, available time slot number, selfThe information such as the distance apart from the distance of networking locomotive, other locomotives apart from networking locomotive, and this table is added toIn NCFG message, periodic broadcast. Equipment receives that the NCFG message of other equipment set it as oneHop neighbor safeguards, and from its NCFG message, obtains a hop neighbor information of other equipment, thereby completesThe two-hop neighbors of self is safeguarded.
Equipment carries out resource negotiation alternately by distributed three-way handshake after networking, and specified data message sendsOn opportunity, can carry out data communication. Microprocessor 5 (comprises locomotive marshalling prison by the data of needs transmissionMeasurement information etc.) send to digital signal processor 4, digital signal processor 4 is added to data-messageIn, data-message after field programmable gate array 3 and digital to analog converter 11 through the antenna of radio-frequency module 2Launch; After the signal that object equipment receives, through analog-digital converter 12, process is thick synchronous, smart sameStep and field programmable gate array 3 Base-Band Processing send to digital signal processor 4, Digital Signal ProcessingDevice 4 therefrom extracts data message and sends to microprocessor 5, thus transfer of data between finishing equipment.
In the time that networking locomotive breaks down, locomotive is all inquired about the information table of self maintained, and equipment of itself is number littleBe less than every other locomotive in all neighbor devices number and self apart from the distance of networking locomotive apart from networking locomotiveThe locomotive of distance keeps former network constant, still periodically sends NCFG message; Other locomotives fall net, enterNet indicator lamp goes out, and reopens into network process.
Can find out, the present invention propose multi-hop networking transmission equipment can realize heavy loading locomotive automatically become net,Network safeguards automatically, robust networking in instant transfer of data and catastrophic failure situation, thereby effectively increasesMobility, the flexibility of strong locomotive double heading marshalling, improve marshalling efficiency, ensures locomotive double heading marshalling simultaneouslyReliability and survivability.
Preferably, as shown in Figure 1, field programmable gate array 3 provides interlayer scheduling interface 31, interlayerDispatch interface 31 is connected with digital signal processor 4 by external memory interface (EMIF) 6. OutsideMemory interface 6 is realized the dispatch between field programmable gate array 3 and digital signal processor 4With transfer of data.
Digital signal processor 4 provides primitive signaling interface 41 and business datum interface 42, and primitive signaling connectsMouth 41 is connected with microprocessor 5 by HPI 7 with business datum interface 42. HPI 7 is realSignaling and business data transmission between existing digital signal processor 4 and microprocessor 5.
Preferably, in the multi-hop networking transmission equipment providing at embodiments of the invention, radio-frequency module 2Comprise AD9361 integrated chip and power amplifier. The digital to analog converter 11 and the analog-digital converter that on base plate 1, arrange12 can adopt IF bandpass sampling structure.
In addition, the function that base plate 1 also connects for realizing interlayer, can also arrange on base plate 1 meanwhileMultiple indicator lamps, these indicator lamps include but not limited to network indicator lamp and networking indicator lamp. Wherein, whenWhile networking successfully, networking indicator lamp amount, in the time of networking success, networking indicator lamp is bright, to remind operatorMember carries out corresponding operating.
Preferably, field programmable gate array 3 is for realizing OFDM two-way based on burstTransmission Base-Band Processing. And, in the present invention, field programmable gate array 3 support long burst structure andTwo kinds of structures of short burst structure, described long burst structure comprises 12 OFDM symbols, for passingTransmission of data message, described short burst structure comprises 4 OFDM symbols, for transmitting data controlMessage processed.
Preferably, microprocessor 5 adopts the microprocessor based on Linux, with provide application surface management andThe function of network management. Wherein, the management of described application surface comprise business datum access, priority determine,The contents such as subnet parsing and multicast group, described network management comprises when display network topological sum shows the whole networkThe contents such as gap resource allocation conditions.
The present invention passes through to adopt field programmable gate array 3, digital signal processor 4, microprocessor 5,And coordinate radio-frequency module 2, be arranged on digital to analog converter 11 and analog-digital converter 12 on base plate 1, formMulti-hop networking transmission equipment. Wherein field programmable gate array 3 completes physical layer OFDM Base-Band Processing,Digital signal processor 4 completes the functions such as scheduling of resource, link maintenance, path finding, route maintenance,Microprocessor 5 is realized application surface management function and network management function, and base plate 1 realizes digital-to-analogue conversion and interlayer connectsConnect.
The multi-hop networking transmission equipment that the present invention proposes adopts the MAC layer design based on time slot reservation schedulingOFDM transmitted in both directions physical layer design with based on burst, can realize automatic one-tenth net, network is tieed up automaticallyProtect, robust networking in collisionless transfer of data and catastrophic failure situation, effectively enhanced machine car weight bindingMobility and the availability of group, improve marshalling efficiency, ensures that the reliability of locomotive double heading marshalling is with anti-simultaneouslyRuining property.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, andNot the restriction to embodiments of the present invention, for those of ordinary skill in the field,On the basis of above-mentioned explanation, can also make other changes in different forms, here cannot be to allEmbodiment give exhaustively, everyly belong to the apparent change that technical scheme of the present invention is extended outChange or the still row in protection scope of the present invention of variation.
Claims (10)
1. a multi-hop networking transmission equipment that is applicable to heavily binding group of heavy loading locomotive, is characterized in that, bagDraw together:
Base plate, is provided with digital to analog converter and analog-digital converter on described base plate, for realizing analog signalAnd conversion and interlayer between data signal are connected;
Radio-frequency module, is connected with described digital to analog converter and described analog-digital converter, for receiving and transmittingRadiofrequency signal;
Field programmable gate array, is connected with described digital to analog converter and described analog-digital converter, for realityThe now physical layer Base-Band Processing based on OFDM, and send result to Digital Signal ProcessingDevice;
Digital signal processor, is connected with described field programmable gate array, for tying according to described processingFruit carries out scheduling of resource, link maintenance, path finding and route maintenance;
Microprocessor, is connected with described digital signal processor, for the data of needs transmission are sent toDescribed digital signal processor, carries out application surface management and network management.
2. multi-hop networking transmission equipment according to claim 1, is characterized in that, described scene canProgramming gate array provides interlayer scheduling interface, and described interlayer scheduling interface is by external memory interface and instituteStating digital signal processor is connected.
3. multi-hop networking transmission equipment according to claim 1, is characterized in that, described numeral letterNumber processor provides primitive signaling interface and business datum interface, described primitive signaling interface and described businessData-interface is connected with described microprocessor by HPI.
4. according to the multi-hop networking transmission equipment described in any one in claims 1 to 3, its feature existsIn, described radio-frequency module comprises AD9361 integrated chip and power amplifier.
5. according to the multi-hop networking transmission equipment described in any one in claims 1 to 3, its feature existsIn, described digital to analog converter and described analog-digital converter adopt IF bandpass sampling structure.
6. according to the multi-hop networking transmission equipment described in any one in claims 1 to 3, its feature existsIn, described field programmable gate array is for realizing the transmitted in both directions base of the OFDM based on burstTape handling.
7. multi-hop networking transmission equipment according to claim 6, is characterized in that, described scene canThe long burst structure of programming gate array support and short burst structure, described long burst structure comprises 12 orthogonal frequencyDivide multiplexed symbols, for transmit data message, described short burst structure comprises 4 OFDMs symbolsNumber, for transmitting Data Control message.
8. according to the multi-hop networking transmission equipment described in any one in claims 1 to 3, its feature existsIn, described microprocessor adopts the microprocessor based on Linux.
9. according to the multi-hop networking transmission equipment described in any one in claims 1 to 3, its feature existsIn, described application surface management comprises that business datum access, priority are determined, subnet is resolved and multicast groupSafeguard, described network management comprises that display network topological sum shows the whole network distributing slot resources situation.
10. according to the multi-hop networking transmission equipment described in any one in claims 1 to 3, its featureBe, multiple indicator lamps are also set on described base plate, and described indicator lamp comprises that networking indicator lamp and networking refer toShow lamp.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511005959.5A CN105611654A (en) | 2015-12-29 | 2015-12-29 | Multi-hop networking transmission equipment applicable to multiple-connection marshalling of heavy-load locomotives |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511005959.5A CN105611654A (en) | 2015-12-29 | 2015-12-29 | Multi-hop networking transmission equipment applicable to multiple-connection marshalling of heavy-load locomotives |
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| CN111328095A (en) * | 2018-12-14 | 2020-06-23 | 株洲中车时代电气股份有限公司 | Wireless reconnection test board and method |
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| US7817609B2 (en) * | 2006-03-27 | 2010-10-19 | Ka Lun Eddie Law | Multi-channel wireless networks |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111328095A (en) * | 2018-12-14 | 2020-06-23 | 株洲中车时代电气股份有限公司 | Wireless reconnection test board and method |
| CN110276945A (en) * | 2019-07-19 | 2019-09-24 | 东北大学 | A kind of automatic driving vehicle grouping method |
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Application publication date: 20160525 |