CN101854258A - Implementation method and device for eliminating communication chip failures - Google Patents
Implementation method and device for eliminating communication chip failures Download PDFInfo
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- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0659—Management of faults, events, alarms or notifications using network fault recovery by isolating or reconfiguring faulty entities
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- H—ELECTRICITY
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Abstract
The invention discloses an implementation method and device for eliminating PROFIBUS-DP protocol communication chip failures. The method comprises the following steps: acquiring the working state of a communication chip; when the working state is data transmitting state, judging whether the hold time of the data transmitting state exceeds the preset time threshold, and if so, determining that the communication chip goes wrong; and setting the current data transmitting state of a bus transceiver connected with the communication chip as data transmitting state. When the communication chip goes wrong and occupies the communication bus, the invention can quickly cut off the occupation of the failure chip in the communication bus.
Description
Technical field
The present invention relates to the industrial automation technical field, more particularly, relate to a kind of PROFIBUS-DP agreement communication chip fault and eliminate implementation method and device.
Background technology
Fieldbus is to be used to manufacture on-the-spot lowermost layer communication network, and it has realized the in-site measurement control instrument of microcomputerization or the bidirectional linked list multinode digital communication between the equipment.PROFIBUS-DP is the bottom control network, aims at automatic control system and device level and disperses design of communication between the I/O, is widely used in dcs (Distributed Control System, high speed data transfer DCS).Central controller communicates with the field apparatus (as I/O, driver etc.) that disperses by the high speed serialization line.
In the prior art, PROFIBUS-DP adopts the RS485 transmission technology, the communication module of respectively forming by PROFIBUS-DP agreement communication special chip SPC3, CPLD (but complexity editorial logic device) and RS485 bus from control station in the DCS system and the data flow transmission function of parsing of main control station communications protocol and physical layer, concrete modular circuit as shown in Figure 1.
When being in the transmission data mode from control station, the data that the SPC3 chip will transmit single-chip microcomputer are converted to the message of PROFIBUS-DP agreement regulation, regulation according to the PROFIBUS-DP agreement is converted to corresponding serial BIT (bit) stream, by the TXD pin on the SPC3 chip data are sent, by CPLD one circuit-switched data signal is divided into two paths of signals, offers two-way RS485 bus and carry out transfer of data respectively.RS485 is responsible for converting the BIT sign indicating number to differential level, to satisfy the requirement of bus transfer.
When being in the reception data mode from control station, the SPC3 chip is in accepting state, receives the data that send on the bus.RS485 interface transceiver module is responsible for the differential signal on the bus is converted to level signal, and by the A/B selection logic of CPLD, the SPC3 selective reception is the signal of one tunnel bus transmission wherein, and BIT stream to receiving, resolve, be combined into message, offer single-chip microcomputer.
But, by discovering of inventor, still exist following shortcoming in the prior art:
When certain communication module from control station breaks down, the RS485 bus interface circuit is in transmit status always, then cause this communication module to occupy bus from control station always, when on the bus other from the communication module of control station when sending data, with the data corruption that causes on the data/address bus, other of system be from the communication module of control station transceive data normally, thereby cause the whole system can't operate as normal.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of communication chip fault to eliminate implementation method and device, when communication chip breaks down when taking communication bus, and can fast shut-off failure chip taking to communication bus.
The embodiment of the invention provides a kind of PROFIBUS-DP agreement communication chip fault to eliminate implementation method, and described method comprises:
Obtain the operating state of communication chip;
When described operating state is the data transmit status, judge whether holding time of described data transmit status surpasses the preset time threshold value, if determine that then described communication chip breaks down;
The current data transmit status of bus transceiver that connects described communication chip is set to data receiving state.
Preferably, describedly judge that whether holding time of described data transmit status surpass the preset time threshold value, comprising:
Obtain the level signal of the transmission FPDP output of described communication chip;
Whether judgement has level to change in the level signal of each byte of described transmission FPDP output in first preset time, if not, determines that then holding time of described data transmit status surpasses described preset time threshold value.
Preferably, describedly judge that whether holding time of described data transmit status surpass the preset time threshold value, comprising:
Obtain the level signal of the port output of sign chip operation state on the described communication chip;
Whether judgement has level to change in the level signal of the port of described identification chip operating state output in second preset time, if not, determines that then holding time of described data transmit status surpasses described preset time threshold value.
Preferably, the described current data transmit status of bus transceiver that the connects described communication chip implementation that is set to data receiving state is:
By the transmitting-receiving control port that described bus transceiver is set is low level, and described transceiver is set to data receiving state.
A kind of PROFIBUS-DP agreement communication chip fault is eliminated implement device, and described device comprises:
The communication chip state acquisition module is used to obtain the operating state of communication chip;
The fault judgement module is used for when described operating state is the data transmit status, judges whether holding time of described data transmit status surpasses the preset time threshold value, if determine that then described communication chip breaks down;
The fault cancellation module, the current data transmit status of bus transceiver that is used for connecting described communication chip is set to data receiving state.
Preferably, described fault judgement module comprises:
First port signal obtains submodule, is used to obtain the level signal of the transmission FPDP output of described communication chip;
First judges submodule, and whether be used for judging has level to change in the level signal of each byte of described transmission FPDP output in first preset time, if not, determines that then holding time of described data transmit status surpasses described preset time threshold value.
Preferably, described fault judgement module comprises:
Second port signal obtains submodule, is used to obtain the level signal of the port output of sign chip operation state on the described communication chip;
Second judges submodule, and whether be used for judging has level to change in the level signal of the port of described identification chip operating state output in second preset time, if not, determines that then holding time of described data transmit status surpasses described preset time threshold value.
Preferably, described fault cancellation module is a low level by the transmitting-receiving control port that described bus transceiver is set, and described transceiver is set to data receiving state.
Compare with prior art, in the technical scheme provided by the invention, operating state to communication chip is monitored, when definite communication chip current working state is the data transmit status, then the time that the current data transmit status is continued monitors, when the duration surpasses the preset time threshold value, determine that then this communication chip breaks down, the current data transmit status that connects the bus transceiver of described communication chip by change is a data receiving state, thereby avoid failure chip to take data/address bus for a long time, and cause when other communication modules on the data/address bus send data, causing the appearance of the situation of data corruption on the data/address bus.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is from the modular circuit schematic diagram of control station in the prior art;
A kind of PROFIBUS-DP agreement communication chip fault that Fig. 2 provides for the embodiment of the invention is eliminated implementation method steps flow chart schematic diagram;
The modular circuit schematic diagram that Fig. 3 provides for the embodiment of the invention from control station;
Fig. 4 is the pin schematic diagram of the packaged chip of fault judgement logic among Fig. 3;
A kind of PROFIBUS-DP agreement communication chip fault that Fig. 5 provides for the embodiment of the invention is eliminated the structural representation of implement device.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
At first PROFIBUS-DP agreement communication chip fault provided by the invention is eliminated implementation method below and describe, with reference to shown in Figure 2, described method comprises:
In the embodiment of the invention, monitor by operating state communication chip, when definite communication chip current working state is the data transmit status, then the time that the current data transmit status is continued monitors, and when the duration surpasses the preset time threshold value, determines that then this communication chip breaks down, at this moment, communication chip takies data/address bus for a long time, when other communication modules on the data/address bus send data, will cause data generation confusion on the data/address bus.When communication chip broke down, the current state that connects the bus transceiver of described communication chip was the data transmit status.Appearance for fear of said circumstances, state by the change bus transceiver is a data receiving state, make failure chip discharge, thereby guarantee that other communication modules on the data/address bus can normal communication, improve the stability of whole system the taking of data bus.
In a preferred embodiment of the invention, the specific implementation that whether surpasses the preset time threshold value of holding time of judging described data transmit status can have following two kinds:
In first kind of implementation, the level signal of the transmission FPDP output by obtaining described communication chip; Whether judgement has level to change in the level signal of each byte of described transmission FPDP output in first preset time, if not, determines that then holding time of described data transmit status surpasses described preset time threshold value.
In second kind of implementation, by obtaining the level signal of the port output of sign chip operation state on the described communication chip; Whether judgement has level to change in the level signal of the port of described identification chip operating state output in second preset time, if not, determines that then holding time of described data transmit status surpasses described preset time threshold value.
Need to prove, above-mentioned two kinds of implementations can be used separately, also can use simultaneously, promptly monitor the level signal of the port of the transmission FPDP of communication chip and identification chip operating state simultaneously, it is more accurate for the fault judgement of communication chip to make.
Wherein, for the port that sends FPDP and identification chip operating state, according to the PROFIBUS-DP agreement, the duration threshold value of predefined port working state is not necessarily identical, therefore, distinguish with first preset time and second preset time respectively for the duration threshold value of the operating state of two ports.
When definite communication chip breaks down, when communication chip takies data/address bus for a long time, in a preferred embodiment of the invention, be low level by the transmitting-receiving control port that described bus transceiver is set, described transceiver is set to data receiving state.When transceiver is set to accepting state, can be so that failure chip discharge the taking of data bus, thus guarantee that other communication modules on the data/address bus can normal communication, improve the stability of whole system.
Below by an instantiation to the explanation that makes an explanation of the technical scheme of the embodiment of the invention.
The SPC3 chip is a PROFIBUS-DP agreement communication special chip, is arranged at from control station usually.Do not setting up before communication is connected with main control station from control station, the RTS pin of the SPC3 chip from control station is maintained the low level signal output state all the time; And when setting up from control station and main control station after communication is connected, the outputs level signals state of the RTS pin of the SPC3 chip from control station is then by the communication state decision from control station and main control station.For the SPC3 chip, can judge the operating state of this chip by the level signal of RTS pin output: when the SPC3 chip was in transmit status, the RTS pin outputs level signals on this chip was a high level signal; At this moment, RS485 interface transceiver module is in transmit status, sends data by it on bus.When SPC3 was in accepting state, the RTS pin outputs level signals on this chip was a low level signal; RS485 interface transceiver module is in accepting state, receives the data that issued by main control station on the bus by it.
In addition, TXD pin on the SPC3 chip is to send data terminal, stipulate according to the PROFIBUS-DP agreement, if chip functions is normal, when transmit status, the TXD pin exists level to change in official hour, this be because: the PROFIBUS-DP agreement adopts NRZ (NRZ) coded system, in lasting period on the throne, binary signal 0 or 1 does not change.For a character, on the PROFIBUS data/address bus, utilize 11 BIT to represent usually, in the transmission course, the presentation format of character is as follows:
Table 1
As seen, in these 11 BIT, exist a level signal at least by 0 to 1 saltus step.
Thus, can by the level signal of corresponding port output, judge and determine whether communication chip breaks down by the port of transmission FPDP on the PROFIBUS-DP agreement communication chip or identification chip operating state is monitored.
As shown in Figure 3, in the embodiment of the invention from control station communication module circuit connection diagram.In Fig. 3, the fault judgement logic is used to monitor the operating state of SPC3 chip, thereby judges whether the SPC3 chip breaks down.The input of fault judgement logic connects the transmission FPDP TXD of SPC3 chip and the port RTS of identification chip operating state respectively, the output of fault judgement logic connects the transmitting-receiving control end (RE, DE) of two-way RS485 transceiver respectively, the fault judgement logic is by the control to RE, DE end level signal, thereby realization is to the control of RS485 transceiver operating state.When the SPC3 chip breaks down, need be set to accepting state by the RS485 transceiver, state by change RS485 transceiver is a data receiving state, make fault SPC3 chip discharge taking to the RS485 data/address bus, thereby guarantee that other communication modules on the RS485 data/address bus can normal communication, improve the stability of whole system.When state that need the RS485 transceiver is set to data receiving state, will receives and dispatches control end (RE, DE) usually and be changed to low level.
As shown in Figure 3, need to prove, in the embodiment of the invention, utilize single-chip microcomputer to obtain communication baud rate from the SPC3 chip, offer the fault judgement logic, the different baud rate of fault judgement logical foundation is set the parameter of bag data transmission timer and byte data transmission timer.Bag data transmission timer is used to be provided with the duration threshold value that sends FPDP (TXD) operating state; The byte data transmission timer is used to be provided with the duration threshold value of port (RTS) operating state of identification chip operating state.
Shown in Fig. 4 is the pin schematic diagram of realizing the packaged chip of fault judgement logic among Fig. 3.Behind the power-up initializing, single-chip microcomputer obtains communication baud rate from SPC3, according to different baud rates, single-chip microcomputer passes through RDBAUD_CS with baud rate information in the mode of parameter, RDDATALEN_CS, DB[07..00] pin is written in the fault judgement logic, fault judgement logical foundation baud rate parameter configuration, set bag data transmission timer, the parameter of byte data transmission timer, afterwards, the fault judgement logic begins to detect the level signal of the TXD pin and the RTS pin of SPC3 chip, if note abnormalities, that is: there is any one generation overtime in two timers, then fault judgement data are in logic sent Enable Pin T_EN pin and be changed to 0, thereby the shutoff transmit button, the RS485 transceiver that the T_EN pin is connected is set to accepting state.Here, data send the control signal of Enable Pin T_EN control by the control RS485 transceiver operating state of communication chip SPC3 output, if the T_EN pin is output as high level (putting 1), then can to control normally and receive the RS485 transceiver be the data transmit status to the control signal of the control RS485 transceiver of SPC3 chip output; If T_EN pin output low level (putting 0), then the RS485 transceiver is forced to be set to data receiving state, no longer accepts the control of the control signal of SPC3 chip output.
Need to prove, when the outputs level signals of the TXD pin of SPC3 chip and RTS pin is all monitored, then behind the SPC3 chip power, the different baud rate of fault judgement logical foundation is carried out the configuration of baud rate parameter, and startup byte data transmission timer, whether the transmission data that detect the SPC3 chip exist the saltus step of level in the time span of each byte (serial ports is 11bit), if not, think that then there is fault in SPC3 chip serial ports output pin, then cut off data and send Enable Pin T_EN, thereby guarantee when the SPC3 chip sends fault, can be set to accepting state by the RS485 transceiver.
When above-mentioned observation process carried out, whether fault judgement logic determines reseting pin RST_L produced the reset level signal, if produce the reset level signal, then carried out the initialization of register in the fault judgement logic again; If do not produce the reset level signal, then bag data transmission timer is configured, start bag data transmission timer, the bag data of after correct transmission data, reloading transmission timer, after if the transmission data are finished, data send Enable Pin T_EN and still do not reset, then wrap the data transmission timer and cut off data transmission Enable Pin T_EN, when being polled to this slave station data transmission beginning next time, start bag data transmission timer function once more, thereby guarantee when the SPC3 chip sends fault, can be set to accepting state by the RS485 transceiver.
As seen, in the foregoing description, monitor by the operating state to communication chip, when definite communication chip current working state was the data transmit status, then the time that the current data transmit status is continued monitored, when the duration surpasses the preset time threshold value, determine that then this communication chip breaks down, at this moment, communication chip takies data/address bus for a long time, when other communication modules on the data/address bus send data, will cause data generation confusion on the data/address bus.When communication chip broke down, the current state that connects the bus transceiver of described communication chip was the data transmit status.Appearance for fear of said circumstances, state by the change bus transceiver is a data receiving state, make failure chip discharge, thereby guarantee that other communication modules on the data/address bus can normal communication, improve the stability of whole system the taking of data bus.
The foregoing description is an example with the SPC3 chip only, certainly, if other the chip that can realize the PROFIBUS-DP agreement is arranged, because chip need be followed the PROFIBUS-DP agreement, promptly utilizes 11 BIT to represent on the PROFIBUS bus for a character, form is similar with the method for expressing of character in the SPC3 chip, therefore, also can adopt embodiment of the invention technical scheme, to this, the present invention no longer gives unnecessary details.
Corresponding above-mentioned PROFIBUS-DP agreement communication chip fault is eliminated implementation method, the embodiment of the invention also provides a kind of PROFIBUS-DP agreement communication chip fault to eliminate implement device, as shown in Figure 5, be the structural representation of this device, this device specifically can comprise:
Communication chip state acquisition module 501 is used to obtain the operating state of communication chip;
In a preferred embodiment of the invention, described fault judgement module comprises:
First port signal obtains submodule, is used to obtain the level signal of the transmission FPDP output of described communication chip;
First judges submodule, and whether be used for judging has level to change in the level signal of each byte of described transmission FPDP output in first preset time, if not, determines that then holding time of described data transmit status surpasses described preset time threshold value.
In another preferred embodiment of the present invention, described fault judgement module comprises:
Second port signal obtains submodule, is used to obtain the level signal of the port output of sign chip operation state on the described communication chip;
Second judges submodule, and whether be used for judging has level to change in the level signal of the port of described identification chip operating state output in second preset time, if not, determines that then holding time of described data transmit status surpasses described preset time threshold value.
Wherein, described fault cancellation module is a low level by the transmitting-receiving control port that described bus transceiver is set, and described transceiver is set to data receiving state.
Monitor by operating state communication chip, when definite communication chip current working state is the data transmit status, then the time that the current data transmit status is continued monitors, when the duration surpasses the preset time threshold value, determine that then this communication chip breaks down, at this moment, communication chip takies data/address bus for a long time, when other communication modules on the data/address bus send data, will cause data generation confusion on the data/address bus.When communication chip broke down, the current state that connects the bus transceiver of described communication chip was the data transmit status.Appearance for fear of said circumstances, state by the change bus transceiver is a data receiving state, make failure chip discharge, thereby guarantee that other communication modules on the data/address bus can normal communication, improve the stability of whole system the taking of data bus.
For device embodiment, because it is substantially corresponding to method embodiment, so describe fairly simplely, relevant part gets final product referring to the part explanation of method embodiment.Device embodiment described above only is schematic, wherein said unit as the separating component explanation can or can not be physically to separate also, the parts that show as the unit can be or can not be physical locations also, promptly can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select wherein some or all of module to realize the purpose of present embodiment scheme according to the actual needs.Those of ordinary skills promptly can understand and implement under the situation of not paying creative work.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-OnlyMemory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation of the spirit or scope that do not break away from the embodiment of the invention in other embodiments.Therefore, the embodiment of the invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (8)
1. a PROFIBUS-DP agreement communication chip fault is eliminated implementation method, it is characterized in that described method comprises:
Obtain the operating state of communication chip;
When described operating state is the data transmit status, judge whether holding time of described data transmit status surpasses the preset time threshold value, if determine that then described communication chip breaks down;
The current data transmit status of bus transceiver that connects described communication chip is set to data receiving state.
2. PROFIBUS-DP agreement communication chip fault according to claim 1 is eliminated implementation method, it is characterized in that, describedly judges that whether holding time of described data transmit status surpasses the preset time threshold value, comprising:
Obtain the level signal of the transmission FPDP output of described communication chip;
Whether judgement has level to change in the level signal of each byte of described transmission FPDP output in first preset time, if not, determines that then holding time of described data transmit status surpasses described preset time threshold value.
3. PROFIBUS-DP agreement communication chip fault according to claim 1 is eliminated implementation method, it is characterized in that, describedly judges that whether holding time of described data transmit status surpasses the preset time threshold value, comprising:
Obtain the level signal of the port output of sign chip operation state on the described communication chip;
Whether judgement has level to change in the level signal of the port of described identification chip operating state output in second preset time, if not, determines that then holding time of described data transmit status surpasses described preset time threshold value.
4. eliminate implementation method according to each described PROFIBUS-DP agreement communication chip fault in the claim 1～3, it is characterized in that the implementation that the described current data transmit status of bus transceiver that connects described communication chip is set to data receiving state is:
By the transmitting-receiving control port that described bus transceiver is set is low level, and described transceiver is set to data receiving state.
5. a PROFIBUS-DP agreement communication chip fault is eliminated implement device, it is characterized in that described device comprises:
The communication chip state acquisition module is used to obtain the operating state of communication chip;
The fault judgement module is used for when described operating state is the data transmit status, judges whether holding time of described data transmit status surpasses the preset time threshold value, if determine that then described communication chip breaks down;
The fault cancellation module, the current data transmit status of bus transceiver that is used for connecting described communication chip is set to data receiving state.
6. PROFIBUS-DP agreement communication chip fault according to claim 5 is eliminated implement device, it is characterized in that described fault judgement module comprises:
First port signal obtains submodule, is used to obtain the level signal of the transmission FPDP output of described communication chip;
First judges submodule, and whether be used for judging has level to change in the level signal of each byte of described transmission FPDP output in first preset time, if not, determines that then holding time of described data transmit status surpasses described preset time threshold value.
7. PROFIBUS-DP agreement communication chip fault according to claim 5 is eliminated implement device, it is characterized in that described fault judgement module comprises:
Second port signal obtains submodule, is used to obtain the level signal of the port output of sign chip operation state on the described communication chip;
Second judges submodule, and whether be used for judging has level to change in the level signal of the port of described identification chip operating state output in second preset time, if not, determines that then holding time of described data transmit status surpasses described preset time threshold value.
8. eliminate implement device according to each described PROFIBUS-DP agreement communication chip fault in the claim 5～7, it is characterized in that, described fault cancellation module is a low level by the transmitting-receiving control port that described bus transceiver is set, and described transceiver is set to data receiving state.
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| PCT/CN2011/072359 WO2011150717A1 (en) | 2010-06-01 | 2011-03-31 | Implementation method and device for eliminating a communication chip fault |
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| WO2011150717A1 (en) * | 2010-06-01 | 2011-12-08 | 杭州和利时自动化有限公司 | Implementation method and device for eliminating a communication chip fault |
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| CN110119111A (en) * | 2019-02-26 | 2019-08-13 | 北京龙鼎源科技股份有限公司 | Communication means and device, storage medium, electronic device |
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| CN111274168A (en) * | 2018-12-05 | 2020-06-12 | 新唐科技股份有限公司 | Processing device and method for changing pin function |
| CN111557652A (en) * | 2020-03-23 | 2020-08-21 | 广东艾诗凯奇智能科技有限公司 | Human health data transmission method and related equipment and storage device thereof |
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| WO2011150717A1 (en) * | 2010-06-01 | 2011-12-08 | 杭州和利时自动化有限公司 | Implementation method and device for eliminating a communication chip fault |
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| CN110119111A (en) * | 2019-02-26 | 2019-08-13 | 北京龙鼎源科技股份有限公司 | Communication means and device, storage medium, electronic device |
| CN110119111B (en) * | 2019-02-26 | 2021-04-16 | 北京龙鼎源科技股份有限公司 | Communication method and device, storage medium, and electronic device |
| CN110825062A (en) * | 2019-11-29 | 2020-02-21 | 北京首钢冷轧薄板有限公司 | Emergency processing system and method for strip steel cleaning section signals |
| CN111557652A (en) * | 2020-03-23 | 2020-08-21 | 广东艾诗凯奇智能科技有限公司 | Human health data transmission method and related equipment and storage device thereof |
| CN112615761A (en) * | 2020-12-18 | 2021-04-06 | 杭州和利时自动化有限公司 | Bus monitoring system |
| CN112615761B (en) * | 2020-12-18 | 2022-05-31 | 杭州和利时自动化有限公司 | Bus monitoring system |
Also Published As
| Publication number | Publication date |
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| CN101854258B (en) | 2013-01-23 |
| WO2011150717A1 (en) | 2011-12-08 |
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