CN103327652B - A kind of double radio station redundancy system of satellite-borne ZigBee network coordinator - Google Patents
A kind of double radio station redundancy system of satellite-borne ZigBee network coordinator Download PDFInfo
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- CN103327652B CN103327652B CN201310247492.XA CN201310247492A CN103327652B CN 103327652 B CN103327652 B CN 103327652B CN 201310247492 A CN201310247492 A CN 201310247492A CN 103327652 B CN103327652 B CN 103327652B
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Abstract
A kind of double radio station redundancy system of satellite-borne ZigBee network coordinator, comprises telegon radio station A, telegon radio station B, relay A, relay B, power supply, signal amplification circuit A, signal amplification circuit B, central processing unit, SPI-A bus, SPI-B bus.Present system adopts the mode of poll response, network coordinator timing sends telemetry command to network-termination device, network-termination device replys telemetry to network coordinator after receiving telemetry command, if network coordinator does not repeatedly receive terminal equipment telemetry, the central processing unit of network coordinator sends handoff radio signal, handoff radio signal is transferred to relay through signal amplifier, relay completing circuit switches, start the new radio station of telegon, complete re-establishing of ZigBee-network, recover network failure.
Description
Technical field
The invention belongs to computer communication field, relate to a kind of radio station of spaceborne ZigBee bus network.
Background technology
For there is the problems such as cable is many, electrical system annexation complicated, Test integration holding time is long, equipment room ad hoc networking difficulty in present satellites, present various countries' space flight circle is radio network technique in a kind of star adopting radio network technique replacement conventional bus to carry out satellite electrical interconnect system of concern all.
ZigBee technology is a kind of short-distance wireless communication technology that latest developments are got up, and is thought by industry the wireless mode being most possibly applied in industry control occasion.ZigBee-network has the advantages such as reliability is high, real-time good, antijamming capability is strong, communication mode is flexible, networking is simple, be subject to being absorbed in of domestic and international aerospace expert, surray university of Britain has successfully used ZigBee as information transmission network between on-board equipment on moonlet.
The radio station of ZigBee-network node is made up of the chip of ZigBee and antenna, and the chip of ZigBee is communicated with central processing unit by SPI or UART interface usually.On star, the reliability requirement of electronic system to ZigBee bus network node communication is very high, and the design in this single radio station exists the single-point problem of ZigBee chip and antenna.Because the ZigBee chip adopted at present does not have aerospace level discharge capacity; satellite-borne ZigBee network node can only be realized by non-aerospace level chip; easily be subject to the impact of space environment (especially Space Particle) in-orbit in situation and occur that logic is abnormal, causes communication abnormality or interruption.
Summary of the invention
Technology of the present invention is dealt with problems and is: for eliminating network node failure to the impact of network service, provide a kind of satellite-borne ZigBee network telegon two radio station redundancy cold standby system, when breaking down in a radio station of telegon, the fault in telegon CPU Timeliness coverage radio station, switched by signal amplifier and relay and restart another radio station, reinitialize satellite-borne ZigBee network, make network recovery normal, thus solve the single-point problem of ZigBee bus network single channel design, ensure the communication security of satellite-borne ZigBee network.
Technical solution of the present invention is: a kind of double radio station redundancy system of satellite-borne ZigBee network coordinator, comprises telegon radio station A, telegon radio station B, relay A, relay B, power supply, signal amplification circuit A, signal amplification circuit B, central processing unit, SPI-A bus, SPI-B bus, wherein, the power end of telegon radio station A connects 2 pins of relay A and 2 pins of relay B simultaneously, the power end of telegon radio station B connects 3 pins of relay A and 3 pins of relay B simultaneously, 1 pin of relay A is the output of connection signal amplifying circuit A and power supply simultaneously, 1 pin of relay B is the output of connection signal amplifying circuit B and power supply simultaneously, the signal input part of signal amplification circuit A and the signal input part of signal amplification circuit B all connect central processing unit, telegon radio station A is communicated with central processing unit by SPI-A bus simultaneously, telegon radio station B is communicated with central processing unit by SPI-B bus, during work, telegon radio station A and telegon radio station B cold standby each other, have and only have one in running order,
If in running order telegon radio station fault-free, then this in running order telegon radio station timed sending telemetry command timing receipt telemetry, central processing unit counting telemetry frame, interpretation network is normal, and the pin connection status of central processing unit latching relay A and relay B is constant; If break down in running order telegon radio station, then this in running order telegon radio station cannot timing receipt telemetry, central processing unit telemetry frame counter data do not increase for a long time, interpretation Network Abnormal, central processing unit changes the pin connection status of relay A and relay B simultaneously, switch telegon radio station, the new telegon radio station switched re-establishes ZigBee-network and initialization.
The present invention's advantage is compared with prior art:
(1) present system adopts two radio station Redundancy Design, has effectively evaded the single-point problem of single channel design, has ensured the communication security of satellite-borne ZigBee network.If present communications passage exists fault when can not normally receive and send data, CPU is independently produced by interpretation and cuts machine order, and switches communication channels timely makes network recovery communicate normally;
(2) present system adopts the pattern of two radio station cold standby, a telegon is remained in satellite-borne ZigBee network, the managerial confusion that the common supervising the network of the multiple telegons brought by Hot Spare produces can not be produced, the pattern of cold standby effectively can reduce the power consumption of network node simultaneously, reduces the consumption of the energy on satellite;
(3) present system have employed the commutation circuit of double copies, CPU sends two by two pins and cuts machine instruction, cut machine instruction for two and send relay A and relay B to respectively by signal amplification circuit A and signal amplification circuit B, relay A and relay B receives that cut after machine instruction all can the path of commutation circuit.Even if signal amplification circuit A and relay A fault, as long as signal amplification circuit B and relay B normally works, the machine instruction of cutting will normally be performed, otherwise, even if signal amplification circuit B and relay B fault, as long as signal amplification circuit A and relay A normally works, the machine instruction of cutting will normally be performed.The commutation circuit of double copies has heightened the reliability of system.
Accompanying drawing explanation
Fig. 1 is the satellite-borne ZigBee network topological diagram that the present invention is based on two radio station telegon;
Fig. 2 is the theory diagram of double radio station redundancy system of satellite-borne ZigBee network coordinator of the present invention.
Embodiment
From network configuration, in ZigBee-network, there is the equipment of two types: ZigBee telegon, ZigBee terminal equipment.ZigBee telegon is in a network as the administrative center of whole network, and it is responsible for initiating setting up collecting of node in new network, setting network parameter, supervising the network and the network information.ZigBee terminal node as information terminal, responsible node self configuration, add or exit network, the collection of facility information, the reception of the transmission of facility information and order and execution.
As shown in Figure 1, for the present invention is based on the satellite-borne ZigBee network topological diagram of two radio station telegon, a telegon and n terminal node is had in satellite-borne ZigBee network, each terminal node has the function of route, can realize the forwarding of information, telegon adopts the mode of operation of two radio station cold standby, and two radio station include transmit antenna and Zigbee protocol chip, two radio station share a processor, and each radio station re-powers to be needed to reinitialize network.Zigbee protocol chip can adopt the realization such as the individual chips CC2420 of TI company, SOC CC2430, the CC2530 of CC2520 or TI company.
Fig. 2 is the theory diagram of double radio station redundancy system of satellite-borne ZigBee network coordinator of the present invention, comprises telegon radio station A, telegon radio station B, relay A, relay B, power supply, signal amplification circuit A, signal amplification circuit B, central processing unit, SPI-A bus, SPI-B bus.
Telegon radio station A connects 2 pins of relay A and 2 pins of relay B, telegon radio station B connects 3 pins of relay A and 3 pins of relay B, the 1 pin connection signal amplifying circuit A of relay A, 1 pin of relay A connects power supply simultaneously, the 1 pin connection signal amplifying circuit B of relay B, 1 pin of relay B connects power supply simultaneously, signal amplification circuit A connects the P1 pin of central processing unit, signal amplification circuit B connects the P2 pin of central processing unit, telegon radio station A is connected with central processing unit by SPI-A bus simultaneously, telegon radio station B is connected with central processing unit by SPI-B bus.Central processing unit processor can adopt the chip such as single-chip microcomputer, ARM, DSP, FPGA, and P1 pin, P2 pin can be set to any two I/O pins of processor.
In satellite-borne ZigBee network, adopt conventional message polling pattern, send telemetry command, after each network-termination device receives telemetry command namely by telegon timing to each network-termination device, answer corresponding telemetry, in moonlet design, the general poll cycle is set to 1S.If network coordinator does not repeatedly receive terminal equipment telemetry, the central processing unit interpretation ZigBee-network now of network coordinator is abnormal, now send handoff radio signal, handoff radio signal is transferred to relay through signal amplifier, relay completing circuit switches, start the new radio station of telegon, complete re-establishing of ZigBee-network, recover network failure.
(1) when telegon radio station A is in running order, when telegon radio station B is in non operating state, if ZigBee-network fault-free, then telegon radio station A timed sending telemetry command, and timing receipt telemetry, central processing unit counting telemetry frame, interpretation network is normal, central authorities' process P1 pin and P2 pin is kept to keep low level signal, low level signal sends to 1 pin of relay A and 1 pin of relay B respectively through signal amplification circuit A and signal amplification circuit B, relay A keeps pin 1 and pin 2 path, relay B keeps pin 1 and pin 2 path, telegon radio station A powers normally, telegon radio station A normally works.
If telegon radio station A has fault, telegon radio station A can not timing receipt telemetry, central processing unit telemetry frame counter data do not increase for a long time, central processing unit interpretation Network Abnormal, central authorities' process P1 pin and P2 pin export high level signal, high level signal sends to 1 pin of relay A and 1 pin of relay B respectively through signal amplification circuit A and signal amplification circuit B, relay A keeps pin 1 and pin 3 path, relay B keeps pin 1 and pin 3 path, the A power down of telegon radio station, telegon radio station B normal power supply, telegon radio station B initiates to set up new network, reinitialize network.
(2) when telegon radio station B is in running order, when telegon radio station A is in non operating state, if ZigBee-network fault-free, then telegon radio station B timed sending telemetry command, and timing receipt telemetry, central processing unit counting telemetry frame, interpretation network is normal, central authorities' process P1 pin and P2 pin is kept to keep low level signal, low level signal sends to 1 pin of relay A and 1 pin of relay B respectively through signal amplification circuit A and signal amplification circuit B, relay A keeps pin 1 and pin 2 path, relay B keeps pin 1 and pin 2 path, telegon radio station B powers normally, telegon radio station B normally works.
If telegon radio station B has fault, telegon radio station B can not timing receipt telemetry, central processing unit telemetry frame counter data do not increase for a long time, central processing unit interpretation Network Abnormal, central authorities' process P1 pin and P2 pin export high level signal, high level signal sends to 1 pin of relay A and 1 pin of relay B respectively through signal amplification circuit A and signal amplification circuit B, relay A keeps pin 1 and pin 3 path, relay B keeps pin 1 and pin 3 path, the B power down of telegon radio station, telegon radio station A normal power supply, telegon radio station A initiates to set up new network, reinitialize network.
The content be not described in detail in specification of the present invention belongs to the known technology of those skilled in the art.
Claims (1)
1. a double radio station redundancy system of satellite-borne ZigBee network coordinator, is characterized in that comprising: telegon radio station A, telegon radio station B, relay A, relay B, power supply, signal amplification circuit A, signal amplification circuit B, central processing unit, SPI-A bus, SPI-B bus, wherein, the power end of telegon radio station A connects 2 pins of relay A and 2 pins of relay B simultaneously, the power end of telegon radio station B connects 3 pins of relay A and 3 pins of relay B simultaneously, 1 pin of relay A is the output of connection signal amplifying circuit A and power supply simultaneously, 1 pin of relay B is the output of connection signal amplifying circuit B and power supply simultaneously, the signal input part of signal amplification circuit A and the signal input part of signal amplification circuit B all connect central processing unit, telegon radio station A is communicated with central processing unit by SPI-A bus simultaneously, telegon radio station B is communicated with central processing unit by SPI-B bus, during work, telegon radio station A and telegon radio station B cold standby each other, have and only have one in running order,
If in running order telegon radio station fault-free, then this in running order telegon radio station timed sending telemetry command timing receipt telemetry, central processing unit counting telemetry frame, interpretation network is normal, central processing unit P1 pin and P2 pin keep low level signal, and low level signal sends to 1 pin of relay A and 1 pin of relay B respectively through signal amplification circuit A and signal amplification circuit B; If break down in running order telegon radio station, then this in running order telegon radio station cannot timing receipt telemetry, central processing unit telemetry frame counter data do not increase for a long time, interpretation Network Abnormal, central processing unit P1 pin and P2 pin export high level signal, high level signal sends to 1 pin of relay A and 1 pin of relay B respectively through signal amplification circuit A and signal amplification circuit B, switch telegon radio station, the new telegon radio station switched re-establishes ZigBee-network and initialization; Described P1 pin, P2 pin are any two I/O pins of central processing unit.
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| CN201310247492.XA CN103327652B (en) | 2013-06-20 | 2013-06-20 | A kind of double radio station redundancy system of satellite-borne ZigBee network coordinator |
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| CN201310247492.XA CN103327652B (en) | 2013-06-20 | 2013-06-20 | A kind of double radio station redundancy system of satellite-borne ZigBee network coordinator |
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| CN103327652B true CN103327652B (en) | 2015-10-21 |
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| US6965756B2 (en) * | 2001-10-05 | 2005-11-15 | Adtran, Inc. | RF loopback test apparatus for data radio transceiver |
| CN202334506U (en) * | 2011-11-22 | 2012-07-11 | 成都航天通信设备有限责任公司 | Switching box with function of automatically switching radio stations |
| CN102421205A (en) * | 2011-12-09 | 2012-04-18 | 佛山科学技术学院 | Zigbee network coordinator |
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