CN106059876A - Mode switching control method, device and system for unidirectional serial bus network - Google Patents

Mode switching control method, device and system for unidirectional serial bus network Download PDF

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Publication number
CN106059876A
CN106059876A CN201610456960.8A CN201610456960A CN106059876A CN 106059876 A CN106059876 A CN 106059876A CN 201610456960 A CN201610456960 A CN 201610456960A CN 106059876 A CN106059876 A CN 106059876A
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node device
mode
message
switching command
command message
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CN201610456960.8A
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CN106059876B (en
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龙祥均
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Light Scientific And Technical Industry Co Ltd In Chongqing Century
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Light Scientific And Technical Industry Co Ltd In Chongqing Century
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H04L12/40013—Details regarding a bus controller
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

The invention provides a mode switching control method, a mode switching method, a device and a system for a unidirectional serial bus network. Master node equipment determines a working mode required by slave node equipment, and instructs the slave node equipment by virtue of a first mode switching instruction message or a second mode switching instruction message to switch into the required working mode; the slave node equipment is configured with two types of working modes: a receiving and forwarding working mode and a receiving and transparent transferring working mode; when the working mode is the receiving and forwarding working mode, received service messages are processed, and whether to send the processed service messages or not is judged; and when the working mode is the receiving and transparent transferring working mode, the received service messages are processed, and the service messages are sent at the same time. Thus, in the embodiments of the invention, the slave node equipment can perform switching of the working mode according to instructions from the master node equipment so as to adapt to different types of service requirements.

Description

Mode switch control method, equipment and the system of a kind of unidirectional serial bus network
Technical field
The present invention relates to communication technical field, particularly relate to the pattern switching control side of a kind of unidirectional serial bus network Method, equipment and system.
Background technology
At present, the unidirectional serial bus applications such as RS485 copies the networks such as instrument in remote industrial control, long-distance intelligent；Wherein, This network generally connects in the way of unidirectional looped network or unidirectional looped network are socketed unidirectional looped network, specifically includes the following two kinds networking side Formula: mode one, concentrator directly constitute unidirectional looped network by unidirectional universal serial bus with some intelligence instruments；Mode two, concentrator Forming backbone network with harvester by unidirectional looped network, each harvester is the most respectively by unidirectional universal serial bus and some intelligence instruments Constitute unidirectional ring net.In above-mentioned networking mode, due to the unidirectional restriction by the unidirectional universal serial bus of RS485, harvester and intelligence Instrument can only support to receive transparent transmission mode of operation, under this reception transparent transmission mode of operation, the data message received processed, It is sent to this data message send port simultaneously, and this reception transparent transmission mode of operation is only applicable to, and data traffic is big and time delay is little The transmission of general service message and response, be not particularly suited for that data traffic is little and the control class service message of time delay no requirement (NR) Send and response；Therefore, how to make the different types of business demand of network-adaptive built by above-mentioned networking mode, become one Individual technical problem urgently to be resolved hurrily.
Summary of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of unidirectional serial bus network Mode switch control method, mode switching method, Apparatus and system, the first mould sent according to host node device from node device The instruction of formula switching command message or the second pattern switching command message is operated the switching of pattern, different types of to adapt to Business demand.
For achieving the above object and other relevant purposes, the embodiment of the present invention provides the mould of a kind of unidirectional serial bus network Formula method for handover control, described unidirectional serial bus network includes host node device, at least one is from node device；Wherein, institute Stating host node device and constitute unidirectional looped network with at least one from node device by unidirectional universal serial bus, the method includes:
Described host node device determines the described mode of operation needed from node device；
Determine when the mode of operation of needs forwards mode of operation for receiving, send first mode switching command message, described First mode switching command message is used for indicating the described reception forwarding mode of operation that mode of operation switched to from node device, same Time, from during as centre from node device, described first mode switching command message is being transmitted to the down hop of self from node Equipment；Described first mode switching command message is being returned to described host node setting from during as final jump from node device Standby；
When determining the mode of operation of needs for receiving transparent transmission mode of operation, send the second pattern switching command message, described Second pattern switching command message is used for indicating described mode of operation being switched to from node device to receive transparent transmission mode of operation also Judge whether to forward described second pattern switching command message；When judging to forward described second pattern switching command message, From during as centre from node device by described second pattern switching command message forward down hop from node device, from as Described first mode switching command message is returned to described host node device when node device by final jump；
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether Service message after processing sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, Described service message is sent simultaneously.
Preferably, the method also includes:
Described host node device receives the first mode switching command message returned；
Described host node device determines described from the work of node device according to the first mode switching command message returned Pattern switches to reception to forward mode of operation.
Preferably, the method also includes:
Described host node device determines described after the mode of operation of node device switches to reception to forward mode of operation, sends out Topology learning instruction message, described topology learning instruction message is sent to be used for indicating and described read described topology learning from node device From the nodes of node device in instruction message, after described nodes is added 1, update described nodes, by update nodes, Self address or equipment of itself ID add in described topology learning instruction message, and from as centre from node device time, Topology learning instruction message after interpolation being completed is transmitted to the down hop of self from node device；From as final jump from During node device, the topology learning instruction message after interpolation being completed returns to described host node device；
Described host node device receives the topology learning instruction message returned, according in the topology learning instruction message returned Nodes, determine the topological structure of described unidirectional looped network from node device address or ID.
Preferably, described host node device sends topology learning instruction message, including:
Described host node device sends topology learning instruction message according to setting time interval or command triggers mode.
The embodiment of the present invention also provides for the mode switching method of a kind of unidirectional serial bus network, described unidirectional universal serial bus Network includes host node device, at least one is from node device；Wherein, described host node device by unidirectional universal serial bus with extremely Few one constitutes unidirectional looped network from node device, and the method includes:
Described when node device receives first mode switching command message, according to described first mode switching command report Literary composition instruction mode of operation is switched to reception forward mode of operation, meanwhile, from as centre from node device time, by described First mode switching command message is transmitted to the down hop of self from node device；At oneself as final jump from node device Time, described first mode switching command message is returned to described host node device；
Described when node device receives the second pattern switching command message, according to described second pattern switching command report Mode of operation is switched to reception transparent transmission mode of operation by the instruction of literary composition, and judges whether to forward described second pattern switching command Message；Judge forward described second pattern switching command message time, from as centre from node device time by described second Pattern switching command message forward down hop from node device, from as final jump from node device time by described first mould Formula switching command message returns to described host node device；
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether Service message after processing sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, Described service message is sent simultaneously.
Preferably, the method also includes:
Described mode of operation switches to from node device reception forward after mode of operation, receive described host node device and send out The topology learning instruction message sent；
Described read described topology learning instruction message from the nodes of node device from node device, by described node Number updates described nodes after adding 1, and adds the nodes of renewal, Self address or equipment of itself ID to described topology learning In instruction message；
Described from node device from as centre from node device time, the topology learning instruction message after interpolation is completed It is transmitted to the down hop of self from node device；From as final jump from node device time, the topology after interpolation is completed Study instruction message returns to described host node device.
According to said method, embodiments provide a kind of master node device, be applied to include host node device, extremely A few host node device from the unidirectional serial bus network of node device；Wherein, described host node device is by unidirectional Universal serial bus constitutes unidirectional looped network with at least one from node device, and this device comprises determining that module, sending module；Wherein,
Described determine module, for determining the described mode of operation needed from node device；
Described, described sending module, for determining that module determines that the mode of operation of needs forwards mode of operation for receiving Time, send first mode switching command message, described first mode switching command message be used for indicating described will from node device Mode of operation switches to reception to forward mode of operation, from during as centre from node device, is cut by described first mode meanwhile Change instruction message and be transmitted to the down hop of self from node device；From during as final jump from node device, by described the One pattern switching command message returns to described host node device；
And described determine that module determines the mode of operation of needs for receiving transparent transmission mode of operation time, second pattern that sends is cut Changing instruction message, described second pattern switching command message is used for indicating and described from node device, mode of operation is switched to reception Transparent transmission mode of operation also judges whether to forward described second pattern switching command message；Judging the described second pattern switching of forwarding During instruction message, from as centre from node device time by described second pattern switching command message forward down hop from joint Point device, sets from described first mode switching command message being returned to described host node during as final jump from node device Standby；
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether Service message after processing sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, Described service message is sent simultaneously.
Preferably, this device also includes:
Receiver module, for receiving the first mode switching command message of return；
Described determine module, be additionally operable to determine according to the first mode switching command message returned described from node device Mode of operation switches to reception to forward mode of operation.
Preferably, described sending module, it is additionally operable to described that to determine that module determines described from the mode of operation of node device After switching to reception to forward mode of operation, sending topology learning instruction message, described topology learning instruction message is used for indicating institute State and read described topology learning instruction message from the nodes of node device from node device, after described nodes is added 1 more New described nodes, adds to the nodes of renewal, Self address or equipment of itself ID in described topology learning instruction message； And from during as centre from node device, the topology learning instruction message after interpolation is completed be transmitted to self down hop from Node device, from during as final jump from node device, the topology learning instruction message after interpolation being completed returns to institute State host node device；
Described determine module, be additionally operable to when described receiver module receives the topology learning instruction message of return, according to Return topology learning instruction message in nodes, determine from node device address or ID described unidirectional looped network topology knot Structure.
Preferably, described sending module, it is additionally operable to send topology learning according to setting time interval or command triggers mode Instruction message.
According to said method, embodiments provide a kind of from node apparatus, be applied to include host node device, extremely Few one from the unidirectional serial bus network of node device from node device；Wherein, described host node device is by unidirectional Universal serial bus with at least one from node device constitute unidirectional looped network, this device includes: receiver module, mode switch module, send out Send module；Wherein,
Described receiver module, is used for receiving first mode switching command message and the second pattern switching command message；
Described mode switch module, is used for when described receiver module receives first mode switching command message, according to The instruction of described first mode switching command message mode of operation is switched to reception forward mode of operation, meanwhile, from as Middle when node device, indicate described sending module that described first mode switching command message is transmitted to the down hop of self From node device；From during as final jump from node device, described sending module is indicated the switching of described first mode to be referred to Message is made to return to described host node device；
Described mode switch module, is additionally operable to when described receiver module receives the second pattern switching command message, root According to the instruction of described second pattern switching command message, mode of operation switched to reception transparent transmission mode of operation, and judge whether to turn Send out the second pattern switching command message described；When judging to forward described second pattern switching command message, from as centre When node device, described sending module is indicated the down hop that described second pattern switching command message forwards to be set from node Standby, from during as final jump from node device, indicate described sending module to be returned by described first mode switching command message Back to described host node device；
Described sending module, is used for the instruction according to described mode switch module by described first mode switching command message It is transmitted to self down hop from node device or described first mode switching command message is returned to described host node set Standby；And, according to the instruction of described mode switch module described second pattern switching command message is transmitted to self next Jump from node device or described second pattern switching command message is returned to described host node device；
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether Service message after processing sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, Described service message is sent simultaneously.
Preferably, described receiver module, it is additionally operable to switch to reception to forward mode of operation in described mode switch module After mode of operation, receive the topology learning instruction message that described host node device sends；
Described device also includes:
More new module, for reading from the nodes of node device in described topology learning instruction message, by described node Number updates described nodes after adding 1, and adds the nodes of renewal, Self address or equipment of itself ID to described topology learning In instruction message；And from as centre from node device time, the topology learning after indicating described sending module interpolation to be completed Instruction message is transmitted to self down hop from node device, and from during as final jump from node device, instruction is described to be sent out Topology learning instruction message after sending module interpolation to be completed returns to described host node device.
Described sending module, is additionally operable to the instruction report of the topology learning after interpolation is completed by the instruction according to described more new module Literary composition is transmitted to the down hop of self from node device；Or, the topology after interpolation being completed according to the instruction of described more new module Study instruction message returns to described host node device.
According to said method, the embodiment of the present invention additionally provides the communication system of a kind of unidirectional serial bus network, and this is System includes: concentrator, at least one harvester, at least one intelligence instrument；Described concentrator includes above-mentioned master node device, Described harvester includes above-mentioned master node device and above-mentioned from node apparatus, and described intelligence instrument includes above-mentioned from node Device；Wherein, described concentrator constitutes unidirectional looped network by unidirectional universal serial bus and at least one described harvester, each described Harvester constitutes unidirectional ring net by unidirectional universal serial bus with at least one described intelligence instrument respectively.
According to said method, the embodiment of the present invention additionally provides the communication system of a kind of unidirectional serial bus network, and this is System includes: concentrator, at least one intelligence instrument, and described concentrator includes above-mentioned master node device, described intelligence instrument bag Include above-mentioned from node apparatus；Wherein, described concentrator is consisted of with at least one described intelligence instrument unidirectional universal serial bus Unidirectional looped network.
In the embodiment of the present invention, described unidirectional serial bus network includes host node device, at least one is from node device； Wherein, described host node device constitutes unidirectional looped network with at least one from node device by unidirectional universal serial bus；Described main joint Point device determines the described mode of operation needed from node device, determines that the mode of operation of needs forwards mode of operation for receiving Time, send first mode switching command message, described first mode switching command message be used for indicating described will from node device Mode of operation switches to reception to forward mode of operation, is being cut by described first mode from during as centre from node device meanwhile Change instruction message and be transmitted to the down hop of self from node device；From as final jump from node device time by described first Pattern switching command message returns to described host node device；When determining the mode of operation of needs for receiving transparent transmission mode of operation, Send the second pattern switching command message, described second pattern switching command message be used for indicating described from node device by work Pattern switches to reception transparent transmission mode of operation, and judges whether to forward described second pattern switching command message；Judging forwarding During described second pattern switching command message, from as centre from node device time by described second pattern switching command message Described first mode switching command message, from node device, is returned by the down hop forwarded from during as final jump from node device Back to described host node device；Wherein, when mode of operation forwards mode of operation for receiving, at the service message received Reason, and judge whether that the service message after processing sends；When mode of operation is for receiving transparent transmission mode of operation, to the business received Message processes, and is sent by described service message simultaneously.So, host node device described in the embodiment of the present invention determines described The mode of operation needed from node device, and by described first mode switching command message or the second pattern switching command message The described mode of operation being switched to from node device need of instruction, can adapt to different types of industry so that described from node device Business demand.
In the embodiment of the present invention, described when node device receives the second pattern switching command message, according to described Mode of operation is switched to reception transparent transmission mode of operation by the instruction of two modes switching command message, and judges whether to forward described the Two modes switching command message；When judging to forward described second pattern switching command message, jumping from node from as centre The down hop forwarded by described second pattern switching command message during equipment is from node device, from setting from node as final jump Time standby, described first mode switching command message is returned to described host node device；Wherein, mode of operation forwards work for receiving During operation mode, the service message received is processed, and judge whether that the service message after processing sends；Mode of operation is When receiving transparent transmission mode of operation, the service message received is processed, described service message is sent simultaneously.So, this Bright embodiment configures two kinds of mode of operations from node device, and pattern can be operated according to the instruction of host node device Switching, to adapt to different types of business demand.
Accompanying drawing explanation
Fig. 1 is shown as the schematic flow sheet of the mode switch control method of the unidirectional serial bus network of the present invention；
Fig. 2 is shown as the schematic flow sheet of the mode switching method of another unidirectional serial bus network of the present invention；
Fig. 3 is shown as the composition structural representation of the master node device of the present invention；
Fig. 4 is shown as the composition structural representation from node apparatus of the present invention；
Fig. 5 is shown as the composition structural representation from node device of the present invention；
Fig. 6 is shown as the composition structural representation of the communication system of the unidirectional serial bus network of the present invention；
Fig. 7 is shown as the composition structural representation of the communication system of another unidirectional serial bus network of the present invention.
Detailed description of the invention
The embodiment of the present invention is applied to unidirectional serial bus network, and described unidirectional serial bus network includes that host node sets Standby, at least one is from node device；Wherein, by unidirectional universal serial bus and at least one is from node device for described host node device Constituting unidirectional looped network, therefore, described unidirectional serial bus network includes described unidirectional looped network；In actual applications, described main joint Point device can use the device such as concentrator or harvester to realize, and described the device such as intelligence instrument can be used real from node device Existing, such as, the device such as intelligent electric meter, Intellectual Heat Meter, intellectual water meter, intelligence gas meter.Based on the above-mentioned network architecture, the present invention implements The pattern switching control process of the unidirectional serial bus network that example provides is as follows:
Described host node device determines the described mode of operation needed from node device, determines that the mode of operation of needs is for connecing When receiving forwarding mode of operation, send first mode switching command message to described from node device；
Described when node device receives first mode switching command message, according to described first mode switching command report Literary composition instruction mode of operation is switched to reception forward mode of operation, meanwhile, from as centre from node device time by described First mode switching command message is transmitted to the down hop of self from node device；From during as final jump from node device Described first mode switching command message is returned to described host node device；
Described host node receives the first mode switching command message returned, according to the first mode switching command report returned Literary composition determines that described switching to from the mode of operation of node device receives forwarding mode of operation；
When described host node device determines the mode of operation of needs for receiving transparent transmission mode of operation, to described from node device Send the second pattern switching command message；
Described when node device receives the second pattern switching command message, according to described second pattern switching command report Mode of operation is switched to reception transparent transmission mode of operation by the instruction of literary composition, and judges whether to forward described second pattern switching command report Literary composition；Judge forward described second pattern switching command message time, from as centre from node device time by described second mould Formula switching command message forward down hop from node device, from as final jump from node device time by described first mode Switching command message returns to described host node device；
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether Service message after processing sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, Described service message is sent simultaneously.
Further, for realizing the automatic study of network topology structure, described host node device determine described from node After the mode of operation of equipment switches to reception to forward mode of operation, send open up according to setting time interval or command triggers mode Flutter study instruction message；
Described when node device receives described topology learning instruction message, read in described topology learning instruction message From the nodes of node device, after described nodes is added 1, update described nodes, and by the nodes updated, Self address Or equipment of itself ID adds in described topology learning instruction message；After interpolation being completed during as centre from node device Topology learning instruction message be transmitted to the down hop of self from node device；To from during as final jump from node device Topology learning instruction message after having added returns to described host node device；
Described host node device receives the topology learning instruction message returned, according in the topology learning instruction message returned Nodes, determine the topological structure of described unidirectional looped network from node device address or ID, with realize network topology structure from Dynamic study.
In the embodiment of the present invention, host node device determines the described mode of operation needed from node device, as required The described switching being operated pattern from node device of mode of operation instruction, can adapt to difference so that described from node device The business demand of type；Further, described host node device switches to reception to turn from the mode of operation of node device described in determining After sending out mode of operation, send topology learning instruction message to described from node device, be described open up from the renewal of node device hop-by-hop Flutter the nodes in study instruction message, and constantly Self address or equipment of itself ID are appended to the instruction of described topology learning In message, and returned to described host node by final jump topology learning instruction message after interpolation is completed by node device and set Standby；Described host node device according to return topology learning instruction message in nodes, determine from node device address or ID The topological structure of described unidirectional looped network, thus realize the automatic study of network topology structure rapidly, tie with sensing network topology The change of structure.
Below in conjunction with the accompanying drawings and specific embodiment the present invention will be further described in detail.
As it is shown in figure 1, the pattern switching control flow process of the unidirectional serial bus network of embodiment of the present invention offer, it is applied to In host node device, implement step and include:
Step S100: described host node device determines the described mode of operation needed from node device, determines the work of needs When operation mode forwards mode of operation for receiving, proceed to step S101；Determine that the mode of operation of needs is for receiving transparent transmission mode of operation Time, proceed to step S102；
Step S101: sending first mode switching command message, described first mode switching command message is used for indicating institute State and from node device, mode of operation switches to reception forward mode of operation, meanwhile, from will during as centre from node device Described first mode switching command message is transmitted to the down hop of self from node device；From setting from node as final jump Time standby, described first mode switching command message is returned to described host node device, terminate this handling process；
Step S102: send the second pattern switching command message, described second pattern switching command message is used for indicating institute State and from node device, mode of operation switched to reception transparent transmission mode of operation and judge whether to forward described second pattern switching to refer to Make message；When judging to forward described second pattern switching command message, from during as centre from node device by described the The down hop that two modes switching command message forwards from node device, from during as final jump from node device by described the One pattern switching command message returns to described host node device；
Here, when judging to forward described second pattern switching command message, need not forward described second mould in judgement During formula switching command message, stop forwarding described second pattern switching command message.
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether Service message after processing sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, Described service message is sent simultaneously.
Concrete, described when node device is operated in reception forwarding mode of operation, the service message received is solved Analysis processes, and judges whether described service message is sent to equipment of itself, the most then process described service message and stop forwarding Described data message；Otherwise, from during as centre from node device, the down hop that described service message forwards is being set from node Standby, from during as final jump from node device, described service message is returned to described host node device；Described set from node For when being operated in reception transparent transmission mode of operation, the service message received is carried out dissection process, described service message is sent out simultaneously Send.
Further, described host node device receives the first mode switching command message returned；
Described host node device determines described from the work of node device according to the first mode switching command message returned Pattern switches to reception to forward mode of operation.
Here, the described first mode switching command message that described host node device sends carries source address and purpose Address, described source address and destination address are described host node device Self address；Or, described first mode switching command Message carries source device ID and purpose device id, and described source device ID and purpose device id are described host node device self Device id；Due to described from node device before receiving described first mode switching command message, be operated in reception transparent transmission Mode of operation, therefore, described from node device when receiving described first mode switching command message, according to described first mould Mode of operation is switched to reception to forward mode of operation, simultaneously, it is not necessary to described first mould by the instruction of formula switching command message Formula switching command message judges, directly described first mode switching command message is transmitted to the down hop of self from node Equipment, by final jump from node device time described first mode switching command message is returned to described host node device；By This, described host node device will receive the described first mode switching command message returned from node device, described return The first mode switching command message returned determines that all mode of operations from node device in described unidirectional looped network switch to and connects Receive and forward mode of operation.
Further, described host node device, when sending first mode switching command message, starts intervalometer timing, if Intervalometer arrives the first mode switching command message also not receiving return when setting response time, it is determined that pattern switching rings Should be failed, at this point it is possible to resend described first mode switching command message, again carry out from node device described in instruction Pattern switches.
Further, described host node device receives the second pattern switching command message returned；
Described host node device determines described from the work of node device according to the second pattern switching command message returned Pattern switches to reception transparent transmission mode of operation.
Here, the described second pattern switching command message that described host node device sends carries source address and purpose Address, described source address and destination address are described host node device Self address；Or, described second pattern switching command Message carries source device ID and purpose device id, and described source device ID and purpose device id are described host node device self Device id；Due to described from node device before receiving described second pattern switching command message, be operated in reception forward Mode of operation, therefore, described from node device when receiving described second pattern switching command message, according to described second mould Mode of operation is switched to reception transparent transmission mode of operation by the instruction of formula switching command message, and to described second pattern switching command Message carries out dissection process, it may be judged whether forward described second pattern switching command message, due to from described second pattern switching The destination address parsed in instruction message is not Self address, therefore, described is cut by described first mode from node device Change instruction message and be transmitted to self down hop from node device, by final jump from node device time described first mode is cut Change instruction message and return to described host node device；Thus, described host node device will receive and described return from node device The the second pattern switching command message returned, determines in described unidirectional looped network according to the second pattern switching command message of described return All mode of operations from node device switch to reception transparent transmission mode of operation.
Further, described host node device, when sending the second pattern switching command message, starts intervalometer timing, if Intervalometer arrives the second pattern switching command message also not receiving return when setting response time, it is determined that pattern switching rings Should be failed, at this point it is possible to resend described second pattern switching command message, again carry out from node device described in instruction Pattern switches.
Here, described being operated in reception transparent transmission mode of operation from node device acquiescence, to adapt to, data traffic is big and time delay The transmission of little general service message and response；If in order to reduce forward delay time to improve forward efficiency, then described According to the instruction of the first mode switching command message that described host node device sends, mode of operation can be cut from node device It is changed to receive and forwards mode of operation, to adapt to that data traffic is little and the transmission of the control class service message of time delay no requirement (NR) and sound Should, such as, the transmission of topology learning instruction message and response.
Further, in order to automatically learn and the change of sensing network topological structure, described host node device determines described After the mode of operation of node device switches to reception to forward mode of operation, send topology learning instruction to described from node device Message, described topology learning instruction message is used for indicating and described reads described topology learning instruction message from joint from node device The nodes of point device, updates described nodes after adding 1 by described nodes, by update nodes, Self address or self Device id adds in described topology learning instruction message, and from as centre from node device time, after interpolation is completed Topology learning instruction message is transmitted to the down hop of self from node device；From during as final jump from node device, incite somebody to action Topology learning instruction message after having added returns to described host node device；
Described host node device receives the topology learning instruction message returned, according in the topology learning instruction message returned Nodes, determine the topological structure of described unidirectional looped network from node device address or ID.
Here, described topology learning instruction message falls within data message.
Concrete, described host node device can send topology learning instruction message in the following way:
(1) according to setting time-interval system transmission
When described host node device sends topology learning instruction message, start intervalometer timing, set when intervalometer arrives During the time, send next topology learning instruction message, say, that use this mode can be according to intervalometer property time-count cycle Ground sends topology learning instruction message, to realize the study automatically of network topology structure and to update.
(2) send according to command triggers mode
Concrete triggering mode is it may be that set user or the far-end network monitoring management that is connected with described host node device During the automatic learning network topological structure of standby needs, trigger described host node device and send topology learning instruction message.
Concrete, described topology learning instruction message carries source address and destination address, described source address and destination Location is described host node device Self address；Or, described topology learning instruction message carries source device ID and purpose sets Standby ID, described source device ID and purpose device id are described host node device equipment of itself ID；Due to now described from node Equipment be operated in reception forward mode of operation, therefore, described from node device when receiving described topology learning instruction message Hop-by-hop updates the nodes in topology learning instruction message, and opens up described in constantly Self address or equipment of itself ID being appended to Flutter in study instruction message, and described topology learning instruction message is judged, due in described topology learning instruction message The destination address carried is not Self address, therefore, and described topology learning instruction message after interpolation is completed by node device It is transmitted to self down hop from node device, by final jump topology learning instruction report after interpolation is completed by node device Literary composition returns to described host node device, and described topology learning instruction message is as shown in table 1:
Table 1
Wherein, described host node device send topology learning instruction message in from the nodes of node device be zero, The nodes from node device is read by described certain position from node device from the topology learning instruction message received, After adding 1 by described nodes, write-back covers the nodes at origin-location, then calculates in institute according to the nodes after updating State and topology learning instruction message adds Self address or the position of equipment of itself ID, and in the position write calculated self Address or equipment of itself ID；Keeping source address and destination address, or, source device ID and the constant situation of purpose device id Under, the topology learning instruction message after interpolation being completed is transmitted to the down hop of self from node device, by final jump from joint After point device nodes after updating and Self address or equipment of itself ID add described topology learning instruction message to, will Topology learning instruction message after having added returns to described host node device.
It should be understood that above-mentioned table 1 is merely illustrative, it is not intended that limitation of the present invention.
As in figure 2 it is shown, the pattern switching flow of the unidirectional serial bus network of embodiment of the present invention offer, it is applied to from joint In point device, implement step and include:
Step S200: described when node device receives first mode switching command message, proceeds to step S201；Receive During to the second pattern switching command message, proceed to step S202；
Step S201: described mode of operation is cut according to the instruction of described first mode switching command message from node device Be changed to receive forward mode of operation, meanwhile, from as centre from node device time, by described first mode switching command message It is transmitted to the down hop of self from node device；From during as final jump from node device, described first mode is switched Instruction message returns to described host node device；
Here, the described first mode switching command message that described host node device sends carries source address and purpose Address, described source address and destination address are described host node device Self address；Or, described first mode switching command Message carries source device ID and purpose device id, and described source device ID and purpose device id are described host node device self Device id；Due to described from node device before receiving described first mode switching command message, be operated in reception transparent transmission Mode of operation, therefore, described from node device when receiving described first mode switching command message, according to described first mould Mode of operation is switched to reception to forward mode of operation, simultaneously, it is not necessary to described first mould by the instruction of formula switching command message Formula switching command message judges, directly described first mode switching command message is transmitted to the down hop of self from node Equipment, by final jump from node device time described first mode switching command message is returned to described host node device.
Step S202: described when node device receives the second pattern switching command message, according to described second pattern Mode of operation is switched to reception transparent transmission mode of operation by the instruction of switching command message, and judges whether to forward described second pattern Switching command message；When judging to forward described second pattern switching command message, proceed to step S203；Need not turn in judgement When sending out the second pattern switching command message described, proceed to step S204；
Step S203: described from node device from as centre from node device time by described second pattern switching command Message is transmitted to down hop from node device, from during as final jump from node device by described first mode switching command report Literary composition returns to described host node device, terminates this handling process；
Step S204: stop forwarding described second pattern switching command message, terminate this handling process；
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether Service message after processing sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, Described service message is sent simultaneously.
Here, described second pattern switching command message carries source address and destination address, described source address and mesh Address be described host node device Self address；Or, described second pattern switching command message carries source device ID And purpose device id, described source device ID and purpose device id are described host node device equipment of itself ID；Due to described from Node device, before receiving described second pattern switching command message, is operated in reception and forwards mode of operation, therefore, institute State from node device when receiving described second pattern switching command message, according to described second pattern switching command message Mode of operation is switched to reception transparent transmission mode of operation by instruction, and carries out described second pattern switching command message at parsing Reason, it may be judged whether forward described second pattern switching command message, owing to resolving from described second pattern switching command message The destination address gone out not is Self address, therefore, described is forwarded by described first mode switching command message from node device To the down hop of self from node device, by final jump from node device time described first mode switching command message is returned To described host node device.
Further, for realizing the automatic study of network topology structure, described switching to from node device mode of operation connects Receive after forwarding mode of operation, receive the topology learning instruction message that host node device sends；
Read from the nodes of node device in described topology learning instruction message, after described nodes is added 1, update institute State nodes, and the nodes of renewal, Self address or equipment of itself ID are added in described topology learning instruction message；
From during as centre from node device, topology learning instruction message interpolation completed is transmitted to next of self Jump from node device；From during as final jump from node device, topology learning instruction message interpolation completed returns to Described host node device.
For realizing said method, the embodiment of the present invention additionally provides a kind of master node device, from node apparatus, owing to this is main Node apparatus, the principle solving problem from node apparatus are similar to method, therefore, and the implementation process of device and enforcement principle To see the implementation process of preceding method and to implement principles illustrated, repeat no more in place of repetition.
See Fig. 3, embodiments provide a kind of master node device, be applied to include host node device, at least one Individual host node device from the unidirectional serial bus network of node device；Wherein, described host node device is by unidirectional serial Bus constitutes unidirectional looped network with at least one from node device, and described device comprises determining that module 300, sending module 301；Its In,
Described determine module 300, for determining the described mode of operation needed from node device；
Described, described sending module 301, for determining that module 300 determines that the mode of operation of needs forwards work for receiving During pattern, sending first mode switching command message, described first mode switching command message is used for indicating and described sets from node Standby mode of operation switch to reception forward mode of operation, meanwhile, from during as centre from node device, by described first mould Formula switching command message is transmitted to the down hop of self from node device；From as final jump from node device time, by institute State first mode switching command message and return to described host node device；
And described determine that module 300 determines the mode of operation of needs for receiving transparent transmission mode of operation time, send the second mould Formula switching command message, described second pattern switching command message is used for indicating and described mode of operation is switched to from node device Receive transparent transmission mode of operation and judge whether to forward described second pattern switching command message；Judging described second pattern of forwarding During switching command message, from down hop during as centre from node device, described second pattern switching command message forwarded From node device, from during as final jump from node device, described first mode switching command message is returned to described main joint Point device；
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether Service message after processing sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, Described service message is sent simultaneously.
In being embodied as, described device also includes:
Receiver module 302, for receiving the first mode switching command message of return；
Described determine module 300, be additionally operable to determine according to the first mode switching command message returned and described set from node Standby mode of operation switches to reception to forward mode of operation.
In being embodied as, described sending module 301, it is additionally operable to described that to determine that module 300 determines described from node device Mode of operation switch to reception to forward after mode of operation, send topology learning instruction message, described topology learning instruction message For indicating described reading described topology learning instruction message from the nodes of node device, by described node from node device Number updates described nodes after adding 1, adds the nodes of renewal, Self address or equipment of itself ID to described topology learning and refers to Make in message；And from during as centre from node device, the topology learning instruction message after interpolation being completed is transmitted to self Down hop from node device, from topology learning instruction report during as final jump from node device, after interpolation is completed Literary composition returns to described host node device；
Described determine module 300, be additionally operable to receive at described receiver module 302 the topology learning instruction message of return Time, according to the nodes in the topology learning instruction message returned, determine described unidirectional looped network from node device address or ID Topological structure.
In being embodied as, described sending module 301, specifically for sending according to setting time interval or command triggers mode Topology learning instruction message.
A kind of preferred implementation that the dividing mode of the function above module only embodiment of the present invention is given, functional module Dividing mode be not construed as limiting the invention.For convenience of description, each several part of apparatus described above is divided into function Various modules or unit are respectively described.Certainly, when implementing the present invention can the function of each module or unit same or Multiple softwares or hardware realize.
See Fig. 4, embodiments provide a kind of from node apparatus, be applied to include host node device, at least one Individual from the unidirectional serial bus network of node device from node device；Wherein, described host node device is by unidirectional serial Bus constitutes unidirectional looped network with at least one from node device, it is characterised in that described device includes: receiver module 400, pattern Handover module 401, sending module 402；Wherein,
Described receiver module 400, is used for receiving first mode switching command message and the second pattern switching command message；
Described mode switch module 401, for receiving first mode switching command message at described receiver module 400 Time, according to the instruction of described first mode switching command message, mode of operation switch to reception forward mode of operation, meanwhile, From during as centre from node device, described sending module 402 is indicated to be transmitted to by described first mode switching command message certainly The down hop of body is from node device；From during as final jump from node device, indicate described sending module 402 by described the One pattern switching command message returns to described host node device；
Described mode switch module 401, is additionally operable to receive the second pattern switching command message at described receiver module 400 Time, according to the instruction of described second pattern switching command message, mode of operation switched to reception transparent transmission mode of operation, and judge Whether forward described second pattern switching command message；When judging to forward described second pattern switching command message, at self For centre from node device time, indicate described sending module 402 by described second pattern switching command message forward down hop From node device, from during as final jump from node device, described sending module 402 is indicated to be switched by described first mode Instruction message returns to described host node device；
Described sending module 402, refers to the switching of described first mode for the instruction according to described mode switch module 401 Make message be transmitted to the down hop of self and return to described master from node device or by described first mode switching command message Node device；And, according to the instruction of described mode switch module 401, described second pattern switching command message is transmitted to certainly The down hop of body returns to described host node device from node device or by described second pattern switching command message；
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether Service message after processing sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, Described service message is sent simultaneously.
In being embodied as, described receiver module 400, it is additionally operable to mode of operation be switched in described mode switch module 401 After receiving forwarding mode of operation, receive the topology learning instruction message that described host node device sends；
Described device also includes:
More new module 403, for reading from the nodes of node device in described topology learning instruction message, by described joint Count and after adding 1, update described nodes, and add the nodes of renewal, Self address or equipment of itself ID to described topology Practise in instruction message；And from as centre from node device time, the topology after indicating described sending module 402 interpolation to be completed Study instruction message is transmitted to self down hop from node device, from during as final jump from node device, indicates institute State the topology learning instruction message after interpolation is completed by sending module 402 and return to described host node device.
Described sending module 402, is additionally operable to the topology learning after interpolation is completed by the instruction according to described more new module 403 Instruction message is transmitted to the down hop of self from node device；Or, according to the instruction of described more new module 403, interpolation is completed After topology learning instruction message return to described host node device.
A kind of preferred implementation that the dividing mode of the function above module only embodiment of the present invention is given, functional module Dividing mode be not construed as limiting the invention.For convenience of description, each several part of apparatus described above is divided into function Various modules or unit are respectively described.Certainly, when implementing the present invention can the function of each module or unit same or Multiple softwares or hardware realize.
Based on above-mentioned from node apparatus, embodiments provide a kind of from node device, described from node device bag Include above-mentioned from node apparatus, below in conjunction with Fig. 5, the described particular make-up structure from node device be described in detail:
As it is shown in figure 5, should include from node device: processor 500, mode controller 501, signal processing controller 502, Inbound port 503, go out port 504；Wherein, the input of described processor 500 is connected with described inbound port, described processor 500 Signal end be connected with the signal end of described mode controller 501；The input of described mode controller 501 and described inbound port 503 connect, and the outfan of described mode controller 501 is connected with the input of described signal processing controller 502, described signal The outfan of processing controller 502 with described go out port 504 be connected.
Here, two kinds of mode of operations of the communication device configured of this changeable mode of operation: described mode controller 501 basis The instruction of the control information that described processor 500 sends turns on self input path to outfan；Mode of operation switches to When receiving forwarding mode of operation, the instruction of the control information that described mode controller 501 sends according to described processor 500 disconnects Self input is to the path of outfan, and the outfan of described processor 500 is connected to described signal processing controller 501 Input.
In the embodiment of the present invention, configure two kinds of mode of operations, when mode of operation is for receiving transparent transmission mode of operation, by business report Literary composition is sent in described processor 500 process, simultaneously by this service message by described mode controller 501 and described letter Number processing controller 502 is sent to out port 504；When mode of operation forwards mode of operation for receiving, described service message is passed Deliver to processor 500 processes, then judged whether that the service message after processing is sent to institute by described processor 500 Stating signal processing controller 502, the service message after described processor 500 will process is sent to described signal processing controller After 502, described signal processing controller 502 service message after processing is sent to out port 504；And it is capable of above-mentioned The switching of two kinds of mode of operations, thus adapt to different types of business demand.
In actual applications, described signal processing controller 502 includes: the first resistance, the second resistance, the first power supply, Two power supplys and gate logic device；Described mode controller 501 uses bus buffer to realize；During described processor 500 can use Central processor (Central Processing Unit, CPU), microprocessor (Micro Processor Unit, MPU), numeral Signal processor (Digital signal Processor, DSP), field programmable gate array (Field Programmable Gate Array, FPGA) or the device such as IC chip realize.
It should be understood that due to described include from node device above-mentioned from node apparatus, therefore, described receiver module 400 can be realized by described inbound port 503 from node device, described sending module 402 can be by described from node device Going out port 504 to realize, described mode switch module 401, described more new module 403 can be by described processors from node device 500, mode controller 501 and signal processing controller 502 realize.
In sum, in the embodiment of the present invention, when mode of operation is for receiving transparent transmission mode of operation, to the data message received Process, this data message is sent to out port simultaneously；When mode of operation forwards mode of operation for receiving, first to reception Data message process, then judge whether will process after data message be sent to out port；Further, two kinds of work Pattern can carry out pattern switching according to instruction, to adapt to different types of business demand, such as, and the big and time delay for adaptation flow The transmission of little general service data message and response, need to switch to mode of operation reception transparent transmission mode；For adapting to flow The transmission of the control class business datum message of little and time delay no requirement (NR) and response, need mode of operation switches to reception forward mould Formula.
The embodiment of the present invention additionally provides a kind of long-distance intelligent and copies instrument system, and as shown in Figure 6, this system includes concentrator 600, at least one harvester 601, at least one intelligence instrument 602；Described concentrator 600 includes above-mentioned master node device, Described harvester 601 includes above-mentioned master node device and from node apparatus, and described intelligence instrument includes above-mentioned filling from node Put；Wherein, described concentrator 600 constitutes unidirectional looped network by unidirectional universal serial bus and at least one described harvester 601, each Described harvester 601 constitutes unidirectional ring net by unidirectional universal serial bus and at least one described intelligence instrument 602 respectively.
In this system, described concentrator 600 constitutes unidirectional by unidirectional universal serial bus with harvester at least one described 601 Looped network, each described harvester 601 constitutes unidirectional ring by unidirectional universal serial bus and at least one described intelligence instrument 602 respectively Subnet, described concentrator 600 as the host node device of this unidirectional looped network, described harvester 601 as this unidirectional looped network from Node device, and the host node device as the unidirectional ring net constituted with self, described intelligence instrument 602 is unidirectional as this Ring net from node device；In this system, described harvester 601 and described intelligence instrument 602 all configure reception transparent transmission work Pattern and reception forward two kinds of mode of operations of mode of operation, described harvester 601 and described intelligence instrument 602 acquiescence to be operated in and connect Receive transparent transmission mode of operation, to adapt to transmission and the response of the general service message that data traffic is big and time delay is little；If in order to drop Low forward delay time is to improve forward efficiency, then the first mode that described harvester 601 can send according to concentrator 600 Mode of operation is switched to reception to forward mode of operation by the instruction of switching command message, and, described intelligence instrument 602 can root According to the instruction of the second pattern switching command message of described harvester 601 transmission, mode of operation switch to reception forward work equally Operation mode, to adapt to that data traffic is little and the transmission of the control class service message of time delay no requirement (NR) and response, such as, topology learning The transmission of instruction message and response.
The embodiment of the present invention additionally provides a kind of long-distance intelligent and copies instrument system, as it is shown in fig. 7, this system includes concentrator 700, at least one intelligence instrument 701；Described concentrator includes that above-mentioned master node device, described intelligence instrument 700 include State from node apparatus；Wherein, described concentrator 700 is by unidirectional universal serial bus and at least one described intelligence instrument 701 structure Become unidirectional looped network.
In this system, described concentrator 700 constitutes list by unidirectional universal serial bus and at least one described intelligence instrument 701 To looped network, described concentrator 700 is as the host node device of this unidirectional looped network, and described intelligence instrument 701 is as this unidirectional looped network From node device；In this system, the configuration of described intelligence instrument 701 receives transparent transmission mode of operation and receives forwarding mode of operation two Plant mode of operation, it is possible to mutually switching according to the instruction of described concentrator 700, work given tacit consent to by described intelligence instrument 701 Receiving transparent transmission mode of operation, to adapt to transmission and the response of the general service data message that data traffic is big and time delay is little；As Fruit is in order to reduce forward delay time to improve forward efficiency, then described intelligence instrument 701 can be according to described concentrator Mode of operation is switched to reception to forward mode of operation by the instruction of the 700 first mode switching command messages sent, to adapt to number The transmission of the control class service message of and time delay no requirement (NR) little according to flow and response, such as, the transmission of topology learning instruction message And response.
In sum, the present invention provides.So, the present invention effectively overcomes various shortcoming of the prior art and has height Degree industrial utilization.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Any ripe Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by the personage knowing this technology.Cause This, have usually intellectual such as complete with institute under technological thought without departing from disclosed spirit in art All equivalences become are modified or change, and must be contained by the claim of the present invention.

Claims (14)

1. a mode switch control method for unidirectional serial bus network, described unidirectional serial bus network includes that host node sets Standby, at least one is from node device；Wherein, by unidirectional universal serial bus and at least one is from node device for described host node device Constitute unidirectional looped network, it is characterised in that described method includes:
Described host node device determines the described mode of operation needed from node device；
Determine when the mode of operation of needs forwards mode of operation for receiving, send first mode switching command message, described first Pattern switching command message is used for indicating described mode of operation being switched to from node device to receive forwarding mode of operation, meanwhile, Setting from node from the down hop that during as centre from node device, described first mode switching command message is transmitted to self Standby；Described first mode switching command message is being returned to described host node setting from during as final jump from node device Standby；
When determining the mode of operation of needs for receiving transparent transmission mode of operation, send the second pattern switching command message, described second Pattern switching command message is used for indicating described mode of operation being switched to from node device receive transparent transmission mode of operation and judge Whether forward described second pattern switching command message；When judging to forward described second pattern switching command message, at self For centre from node device time down hop that described second pattern switching command message is forwarded from node device, from as finally Described first mode switching command message is returned to described host node device when node device by one jumping；
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether to locate Service message after reason sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, simultaneously Described service message is sent.
Method the most according to claim 1, it is characterised in that described method also includes:
Described host node device receives the first mode switching command message returned；
Described host node device determines described from the mode of operation of node device according to the first mode switching command message returned Reception is switched to forward mode of operation.
Method the most according to claim 2, it is characterised in that described method also includes:
Described host node device determines described after the mode of operation of node device switches to reception to forward mode of operation, and transmission is opened up Flutterring study instruction message, described topology learning instruction message is used for indicating and described reads the instruction of described topology learning from node device From the nodes of node device in message, after described nodes is added 1, update described nodes, by update nodes, self Address or equipment of itself ID add in described topology learning instruction message, and from during as centre from node device, will add Topology learning instruction message after having added is transmitted to the down hop of self from node device；At oneself as final jump from node During equipment, the topology learning instruction message after interpolation being completed returns to described host node device；
Described host node device receives the topology learning instruction message returned, according to the joint in the topology learning instruction message returned Count, determine from node device address or ID the topological structure of described unidirectional looped network.
Method the most according to claim 3, it is characterised in that described host node device sends topology learning instruction message, Including:
Described host node device sends topology learning instruction message according to setting time interval or command triggers mode.
5. a mode switching method for unidirectional serial bus network, described unidirectional serial bus network include host node device, At least one is from node device；Wherein, by unidirectional universal serial bus and at least one is from node device structure for described host node device Become unidirectional looped network, it is characterised in that described method includes:
Described when node device receives first mode switching command message, according to described first mode switching command message Mode of operation is switched to reception to forward mode of operation by instruction, meanwhile, from during as centre from node device, by described first Pattern switching command message is transmitted to the down hop of self from node device；From during as final jump from node device, incite somebody to action Described first mode switching command message returns to described host node device；
Described when node device receives the second pattern switching command message, according to described second pattern switching command message Mode of operation is switched to reception transparent transmission mode of operation by instruction, and judges whether to forward described second pattern switching command message； When judging to forward described second pattern switching command message, from during as centre from node device, described second pattern is being cut Change instruction message and be transmitted to down hop from node device, from during as final jump from node device, described first mode is switched Instruction message returns to described host node device；
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether to locate Service message after reason sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, simultaneously Described service message is sent.
Method the most according to claim 5, it is characterised in that described method also includes:
Described mode of operation switches to from node device reception forward after mode of operation, receive what described host node device sent Topology learning instruction message；
Described read described topology learning instruction message from the nodes of node device from node device, described nodes is added Update described nodes after 1, and the nodes of renewal, Self address or equipment of itself ID are added to the instruction of described topology learning In message；
Described from node device from during as centre from node device, topology learning instruction message after interpolation being completed forwards To the down hop of self from node device；From as final jump from node device time, the topology learning after interpolation is completed Instruction message returns to described host node device.
7. a master node device, is applied to include host node device, at least one is from the unidirectional universal serial bus net of node device Host node device in network；Wherein, described host node device is consisted of from node device with at least one unidirectional universal serial bus Unidirectional looped network, it is characterised in that described device comprises determining that module, sending module；Wherein,
Described determine module, for determining the described mode of operation needed from node device；
Described sending module, for described determine that module determines that the mode of operation of needs forwards mode of operation for receiving time, send out Send first mode switching command message, described first mode switching command message be used for indicating described from node device by Working mould Formula switch to reception forward mode of operation, meanwhile, from as centre from node device time, by described first mode switching command Message is transmitted to the down hop of self from node device；From as final jump from node device time, by described first mode Switching command message returns to described host node device；
And described determine that module determines the mode of operation of needs for receiving transparent transmission mode of operation time, send the second pattern switching and refer to Message, described second pattern switching command message is made to be used for indicating and described mode of operation switches to from node device reception transparent transmission Mode of operation also judges whether to forward described second pattern switching command message；Judging the described second pattern switching command of forwarding During message, from during as centre from node device, the down hop that described second pattern switching command message forwards is being set from node Standby, from during as final jump from node device, described first mode switching command message is returned to described host node device；
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether to locate Service message after reason sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, simultaneously Described service message is sent.
Device the most according to claim 7, it is characterised in that described device also includes:
Receiver module, for receiving the first mode switching command message of return；
Described determine module, be additionally operable to determine according to the first mode switching command message returned described from the work of node device Pattern switches to reception to forward mode of operation.
Device the most according to claim 8, it is characterised in that described sending module, is additionally operable to determine that module is true described Fixed described after the mode of operation of node device switches to reception to forward mode of operation, send topology learning instruction message, described Topology learning instruction message is for reading described topology learning instruction message from node device from node device described in indicating Nodes, updates described nodes after adding 1 by described nodes, the nodes of renewal, Self address or equipment of itself ID are added It is added in described topology learning instruction message；And from as centre from node device time, the topology learning after interpolation is completed Instruction message is transmitted to self down hop from node device, from during as final jump from node device, interpolation is completed After topology learning instruction message return to described host node device；
Described determine module, be additionally operable to when described receiver module receives the topology learning instruction message of return, according to return Topology learning instruction message in nodes, determine the topological structure of described unidirectional looped network from node device address or ID.
Device the most according to claim 9, it is characterised in that described sending module, is additionally operable to according to setting time interval Or command triggers mode sends topology learning instruction message.
11. 1 kinds, from node apparatus, are applied to include host node device, at least one is from the unidirectional universal serial bus net of node device In network from node device；Wherein, described host node device is consisted of from node device with at least one unidirectional universal serial bus Unidirectional looped network, it is characterised in that described device includes: receiver module, mode switch module, sending module；Wherein,
Described receiver module, is used for receiving first mode switching command message and the second pattern switching command message；
Described mode switch module, for when described receiver module receives first mode switching command message, according to described Mode of operation is switched to reception to forward mode of operation, meanwhile, from as centre by the instruction of first mode switching command message When node device, indicate described sending module that described first mode switching command message is transmitted to the down hop of self from joint Point device；From during as final jump from node device, indicate described sending module by described first mode switching command report Literary composition returns to described host node device；
Described mode switch module, is additionally operable to when described receiver module receives the second pattern switching command message, according to institute Mode of operation is switched to reception transparent transmission mode of operation by the instruction stating the second pattern switching command message, and judges whether to forward institute State the second pattern switching command message；When judging to forward described second pattern switching command message, at oneself as centre from joint During point device, indicate the down hop that described second pattern switching command message is forwarded by described sending module from node device, From during as final jump from node device, indicate described sending module that described first mode switching command message is returned to institute State host node device；
Described sending module, for forwarding described first mode switching command message according to the instruction of described mode switch module Described host node device is returned to from node device or by described first mode switching command message to the down hop of self；With And, according to the instruction of described mode switch module, described second pattern switching command message is transmitted to the down hop of self from joint Point device or described second pattern switching command message is returned to described host node device；
Wherein, when mode of operation forwards mode of operation for receiving, the service message received is processed, and judges whether to locate Service message after reason sends；When mode of operation is for receiving transparent transmission mode of operation, the service message received is processed, simultaneously Described service message is sent.
12. devices according to claim 11, it is characterised in that described receiver module, are additionally operable to switch in described pattern After mode of operation is switched to reception to forward mode of operation by module, receive the topology learning instruction report that described host node device sends Literary composition；
Described device also includes:
More new module, for reading in described topology learning instruction message from the nodes of node device, adds 1 by described nodes The described nodes of rear renewal, and the nodes of renewal, Self address or equipment of itself ID are added to the instruction of described topology learning In message；And from topology learning instruction during as centre from node device, after indicating described sending module interpolation to be completed Message is transmitted to self down hop from node device, from during as final jump from node device, indicates described transmission mould Topology learning instruction message after interpolation is completed by block returns to described host node device.
Described sending module, is additionally operable to the topology learning instruction message after interpolation is completed by the instruction according to described more new module and turns Issue the down hop of self from node device；Or, the topology learning after interpolation being completed according to the instruction of described more new module Instruction message returns to described host node device.
The communication system of 13. 1 kinds of unidirectional serial bus networks, it is characterised in that described system includes: concentrator, at least one Harvester, at least one intelligence instrument；Described concentrator includes the master node device as described in any one of claim 7 to 10, Described harvester include the master node device as described in any one of claim 7 to 10 and as described in claim 11 or 12 from Node apparatus, described intelligence instrument include as described in claim 11 or 12 from node apparatus；Wherein, described concentrator passes through Unidirectional universal serial bus constitutes unidirectional looped network with at least one described harvester, and each described harvester is total by unidirectional serial respectively Line constitutes unidirectional ring net with at least one described intelligence instrument.
The communication system of 14. 1 kinds of unidirectional serial bus networks, it is characterised in that described system includes: concentrator, at least one Intelligence instrument, described concentrator includes that the master node device as described in any one of claim 7 to 10, described intelligence instrument include As described in claim 11 or 12 from node apparatus；Wherein, described concentrator is by unidirectional universal serial bus and at least one institute State intelligence instrument and constitute unidirectional looped network.
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