CN214480674U - Bridge and combined network - Google Patents
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- CN214480674U CN214480674U CN202023183614.8U CN202023183614U CN214480674U CN 214480674 U CN214480674 U CN 214480674U CN 202023183614 U CN202023183614 U CN 202023183614U CN 214480674 U CN214480674 U CN 214480674U
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Abstract
The embodiment of the utility model provides a bridge and combination formula network, this bridge includes: a first NT node for connecting FC switches in a switched network; a data cache unit for connecting the first NT node; the first NC node is used for connecting the data cache unit and the optical splitter in the bus type network; the first NT node is used for transmitting downlink data to the first NC node; the first NC node is used for transmitting uplink data to the first NT node; and the data caching unit is used for caching the data and the transmission address corresponding table. Any two nodes in the combined network can communicate with each other, the communication between the nodes in different bus networks and the communication between the node in the bus network and the node in the switching network are forwarded through the bridge, and therefore the defects existing in the two network modes are overcome.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to a bridge and combination formula network.
Background
The FC-AE-1553 protocol network comprises an exchange type and a bus type, and the two networking modes have respective advantages and disadvantages and can be applied according to different scene requirements.
Switched network topology as shown in fig. 1, devices in a network include NC nodes, NT nodes, and FC switches. The NC node is used as a network controller to control data transmission among all nodes in the whole network, and the FC switch is used as a transfer device for data transmission among all nodes. The NC node can simultaneously operate data transmission among the plurality of NT nodes through concurrent message configuration, and the data transmission among the plurality of NT nodes can be carried out without blocking through the FC switch.
The bus type network topology is shown in fig. 2, and the devices in the network include an NC node, an NT node, and an optical splitter. The role of the NC node and the NT node in the network is the same as that of a switched network. The NC node and the NT node are connected through an optical splitter, and the NT nodes are combined into one path through the optical splitter to be communicated with the NC node. Each NT node needs to initiate communication in a time-sharing manner, so that the total communication bandwidth of the network is equal to one FC communication bandwidth.
From the above, the switch network is analyzed as follows:
because concurrent communication design of each node can be carried out, the utilization rate of the whole network bandwidth is high; because the network must be built and used FC switch, the design cost is high, and the equipment occupation volume is large.
The bus network is analyzed as follows:
because each NT node needs time-sharing communication, the whole communication bandwidth is limited and is only equivalent to one FC communication bandwidth; compared with the switch, the optical branching device has small volume and low cost, and is beneficial to reducing the network construction cost; since the optical fiber is attenuated after being split, the number of optical splitters is limited, and the scale of network expansion is limited.
If the network construction needs to hope to expand the number of network nodes with low cost and ensure the communication bandwidth as much as possible, the switching network and the bus network can not independently meet the requirements.
Disclosure of Invention
To the problem that prior art exists, the embodiment of the utility model provides a bridge and combination formula network.
In a first aspect, an embodiment of the present invention provides a bridge, including:
a first NT node for connecting FC switches in a switched network;
a data caching unit for connecting the first NT node;
the first NC node is used for connecting the data cache unit and the optical splitter in the bus type network;
the first NT node is configured to transmit downlink data to the first NC node;
the first NC node is configured to transmit uplink data to the first NT node;
the data cache unit is used for caching data and a transmission address corresponding table.
Further, the first NT node is configured with a FIFO buffer unit.
Further, the first NC node is configured with a FIFO buffer unit.
In a second aspect, the embodiments of the present invention provide a combined network, including a network controller and an FC switch belonging to a switched network, a plurality of optical splitters belonging to a bus network and respective network terminals located under each optical splitter, and a plurality of bridges as described above, wherein:
the network controller is connected with an FC switch, and the FC switch is connected with a first NT node of a plurality of bridges;
each network terminal under each optical splitter is respectively connected with the corresponding optical splitter, and each optical splitter is respectively connected with the first NC node of one bridge;
the first NT node, the FC switch and the network controller in each bridge form a switched network; and the first NC node in each bridge, the optical splitter and each network terminal under the optical splitter form a bus network.
Further, the combined network is also configured with a backup FC switch that functions the same as the FC switch.
Further, the combined network is also provided with a standby optical splitter which has the same function as the optical splitter.
The embodiment of the utility model provides a bridge and combination formula network can realize carrying out the data interaction through the mode of sharing data cache. Any two nodes in the combined network can communicate with each other, the communication between the nodes in different bus networks and the communication between the node in the bus network and the node in the switching network are forwarded through the bridge, and therefore the defects existing in the two network modes are overcome.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a block diagram of a conventional switched network;
FIG. 2 is a block diagram of a prior art bus-based network;
fig. 3 is a block diagram of the bridge according to the present invention;
FIG. 4 is a block diagram of the combined network of the present invention;
fig. 5 is a flow chart of downlink data transmission in the combined network of the present invention;
fig. 6 is a flow chart of the upload data transmission in the combined network of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Fig. 3 shows a schematic structural diagram of a bridge according to an embodiment of the present invention, referring to fig. 3, the bridge includes a first NT node, a data caching unit, and a first NC node, where:
a first NT node for connecting FC switches in a switched network;
a data cache unit for connecting the first NT node;
the first NC node is used for connecting the data cache unit and the optical splitter in the bus type network;
the first NT node is used for transmitting downlink data to the first NC node;
the first NC node is used for transmitting uplink data to the first NT node;
and the data cache unit is used for caching the data for transmission and transmitting the address corresponding table.
In this regard, it should be noted that, in this embodiment, the first NT node is a network terminal, which is a network terminal used by the bridge to construct a switched network. The first NC node is a network controller, which is a network terminal used by the bridge to construct a bus-type network. The network is suitable for FC-AE-1553 protocols.
The data buffer unit is respectively connected with the first NT node and the first NC node and is used for storing uplink data and downlink data and storing a transmission address corresponding table.
For downlink data, the transmission address correspondence table records the one-to-one correspondence relationship between the subaddress of the NT node of the switch network and the subaddress of the NT node of the bus network.
For the uplink data, the transmission address correspondence table records the one-to-one correspondence relationship between the subaddress of the NT node of the bus network and the subaddress of the NT node of the switching network.
Therefore, the bridge of the embodiment is used for establishing a combined network with a switched network and a bus network, and can realize data interaction in a mode of sharing a data cache. Any two nodes in the combined network can communicate with each other, the communication between the nodes in different bus networks and the communication between the node in the bus network and the node in the switching network are forwarded through the bridge, and therefore the defects existing in the two network modes are overcome.
After the bridge is used for establishing the combined network, in the data transmission process, in order to prevent the condition of cache data coverage in the bridge caused by untimely arrangement of bus type network messages, an FIFO cache unit is configured for each first NT node, an FIFO cache unit is configured for each first NC node, and the size of the FIFO cache unit calculates the possible maximum congestion value setting according to the arrangement condition of two levels of network messages.
Fig. 4 shows a block diagram of a combined network provided by an embodiment of the present invention, referring to fig. 4, the combined network includes a network controller and an FC switch belonging to a switching network, a plurality of optical splitters belonging to a bus network and network terminals located below each optical splitter, and a plurality of bridges provided by the above embodiments, wherein:
the network controller is coupled to an FC switch coupled to a first NT node of the plurality of bridges.
And each network terminal under each optical splitter is respectively connected with the corresponding optical splitter, and each optical splitter is respectively connected with the first NC node of one bridge.
The first NT node, the FC switch and the network controller in each bridge form a switched network; and the first NC node in each bridge, the optical splitter and each network terminal under the optical splitter form a bus network. That is, a bus network is hung from the NT node under a switched network.
As shown in fig. 4, the combined network is divided into two levels for management, the first level is a switching network, and the second level is a bus network. Only one switched NC node (i.e. the network controller belonging to the switched network described above) in the switched network is used as a master scheduling node for network communication, and concurrent data transmission can be realized between the switched NT nodes through message configuration of the switched NC node. The bus network can be a plurality of networks, each bus network is mounted on a switching NT node through a bridge, and the bus network and the switching NT node perform data interaction in a mode of sharing a data cache. Any two nodes in the combined network can communicate with each other, the communication between the nodes in different bus networks and the communication between the node in the bus network and the node in the switching network are forwarded through the bridge, and therefore the defects existing in the two network modes are overcome.
In the combined network, the equipment with low data transmission rate requirement can be used as a bus type NT node, the equipment with high data transmission rate requirement can be used as a switching type NT node, and the number of the bus type NT node and the switching type NT node in the network is determined according to the whole construction requirement of the network.
The combined network is also configured with a backup FC switch that functions the same as the FC switch.
The combined network is also provided with a standby optical splitter which has the same function as the optical splitter.
For convenience of description, the data transmission directions in the network are classified into the following:
downlink data transmission, wherein data are transmitted from the switching type NT node to the bus type NC node in the bridge;
and (4) uplink data transmission, wherein data is transmitted from the bus type NC node to the switching type NT node in the bridge.
For downlink data, the transmission address correspondence table records the one-to-one correspondence relationship between the subaddress of the NT node of the switch network and the subaddress of the NT node of the bus network.
For the uplink data, the transmission address correspondence table records the one-to-one correspondence relationship between the subaddress of the NT node of the bus network and the subaddress of the NT node of the switching network.
The downlink data transmission process is shown in fig. 5, taking the case that the switching NC node sends data to the bus NT node as an example.
The flow of uplink data transmission is shown in fig. 6, taking the case that the switching NC node sends data to the bus NT node as an example.
The establishment of the combined network with the switched network and the bus network in this embodiment can realize data interaction in a manner of sharing a data cache. Any two nodes in the combined network can communicate with each other, the communication between the nodes in different bus networks and the communication between the node in the bus network and the node in the switching network are forwarded through the bridge, and therefore the defects existing in the two network modes are overcome.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (6)
1. A bridge, comprising:
a first NT node for connecting FC switches in a switched network;
a data caching unit for connecting the first NT node;
the first NC node is used for connecting the data cache unit and the optical splitter in the bus type network;
the first NT node is configured to transmit downlink data to the first NC node;
the first NC node is configured to transmit uplink data to the first NT node;
the data cache unit is used for caching data and a transmission address corresponding table.
2. The bridge of claim 1, wherein the first NT node is configured with a FIFO buffer unit.
3. The bridge of claim 1, wherein the first NC node is configured with a FIFO buffer unit.
4. A combined network comprising a network controller and an FC switch belonging to a switched network, a plurality of optical splitters belonging to a bus network and respective network terminals located under each optical splitter, and a plurality of bridges according to any one of claims 1-2, wherein:
the network controller is connected with an FC switch, and the FC switch is connected with a first NT node of a plurality of bridges;
each network terminal under each optical splitter is respectively connected with the corresponding optical splitter, and each optical splitter is respectively connected with the first NC node of one bridge;
the first NT node, the FC switch and the network controller in each bridge form a switched network; and the first NC node in each bridge, the optical splitter and each network terminal under the optical splitter form a bus network.
5. The combined network of claim 4, further configured with a backup FC switch that functions the same as an FC switch.
6. A combined network according to claim 4, characterised in that the combined network is also provided with a backup optical splitter functioning as an optical splitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023183614.8U CN214480674U (en) | 2020-12-25 | 2020-12-25 | Bridge and combined network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023183614.8U CN214480674U (en) | 2020-12-25 | 2020-12-25 | Bridge and combined network |
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| CN214480674U true CN214480674U (en) | 2021-10-22 |
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| CN202023183614.8U Expired - Fee Related CN214480674U (en) | 2020-12-25 | 2020-12-25 | Bridge and combined network |
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