Dual-network dual-link routing method and system based on HPLC (High Performance Liquid Chromatography) and HRF (High Performance Radio Frequency)

Abstract

The invention provides a dual-network dual-link routing method and system based on HPLC (High Performance Liquid Chromatography) and HRF (High Frequency Radio Frequency). The system comprises dual-network dual links consisting of an HPLC network branch and an HRF network branch; the HPLC network branch comprises a CCO node, at least two PCO nodes and at least one STA node; the CCO node is in communication connection with at least one PCO node based on HPLC; at least one PCO node is in communication connection with other PCO nodes and at least one STA node based on HPLC; the HRF network branch comprises a CCO node, at least two PCO nodes and at least one STA node; the CCO node is in communication connection with at least one PCO node based on the HRF; and the at least one PCO node is in communication connection with other PCO nodes and the at least one STA node based on the HRF. The method has the advantages of double networks and double links while improving the overall stability of the network.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power communication, and in particular to a dual-network dual-link routing method and a system thereof based on HPLC+HRF. Background Art

[0002] At present, HPLC+HRF communication technology is widely used in power grid data collection. Its high-speed dual-link advantage greatly increases the communication bandwidth, making more high-speed and large-data volume services possible.

[0003] The existing dual-receive and dual-transmit solution can release the hardware performance of HPLC+HRF dual links to a certain extent, but its communication network routing structure, such as Figure 1 As shown in the figure, the HPLC link and HRF link of the node both point to the same proxy PCO node, that is, the node that has been connected to the network has one and only one proxy PCO node (parent node). In other words, its HPLC and HRF links are completely in the same network. Once the proxy PCO node fails or the dual link between the proxy node and the CCO node is affected by multiple interferences and fails at the same time, the proxy PCO node and its affiliated nodes will have a large-scale network anomaly, and recovery will take a long time. HPLC+HRF communication technology still has room for improvement in terms of the stability of the dual-receive and dual-transmit network and how to give full play to the advantages of dual links. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a dual-network dual-link routing method and system based on HPLC+HRF, which can improve the overall stability of the network without increasing the hardware cost while also having the advantages of dual-network dual-link.

[0005] In order to solve the above technical problems, the first technical solution adopted by the present invention is: A dual-network dual-link routing method based on HPLC+HRF, comprising a dual-network dual-link consisting of an HPLC network branch and an HRF network branch; The HPLC network branch includes a CCO node, at least two PCO nodes and at least one STA node; the CCO node is connected to the at least one PCO node for communication based on HPLC; the at least one PCO node is connected to other PCO nodes and at least one STA node for communication based on HPLC; The HRF network branch includes the CCO node, the at least two PCO nodes and the at least one STA node; the CCO node is connected to the at least one PCO node for communication based on HRF; the at least one PCO node is connected to the other PCO nodes and the at least one STA node for communication based on HRF; When an abnormality occurs in the HPLC network branch or the HRF network branch, another normal network branch is used for communication interaction, and the abnormal network branch is repaired through the other normal network branch.

[0006] Optionally, when an abnormality occurs in the HPLC network branch or the HRF network branch, another normal network branch is used for communication interaction, including: When a PCO node in the HPLC network branch or the HRF network branch fails or its communication link fails, the STA node connected to the one PCO node uses another PCO node connected to it in another normal network branch to upload data, and the CCO node uses the other PCO node to send data to the STA node.

[0007] Optionally, repairing the abnormal network branch by using another normal network branch includes: If a STA node in the HPLC network branch or the HRF network branch cannot receive data from the CCO node, the STA node uses another normal network branch to initiate an agent change request message to the CCO node; the CCO node sends a corresponding agent change request confirmation message to the STA node through the other normal network branch based on the received agent change request message; the STA node changes the PCO node connected to it in the network branch that cannot receive data from the CCO node based on the received agent change request confirmation message; If the CCO node cannot receive data sent by a STA node through the HPLC network branch or the HRF network branch, the CCO node sends a routing repair request message to the STA node through another normal network branch; the STA node sends a corresponding routing repair request reply message to the CCO node through another normal network branch; the CCO node sends a routing repair response message to the STA node through another normal network branch; the STA node changes the PCO node connected to it in the abnormal network branch according to the routing repair response message.

[0008] Optionally, in the routing table entry of each node, the highest bit of TEI corresponds to different values ​​for the HPLC network branch and the HRF network branch, and the lower 11 bits of TEI are the actual TEI in the HPLC+HRF network.

[0009] Another technical solution provided by the present invention is: A dual-network dual-link routing system based on HPLC+HRF, including a dual-network dual-link consisting of an HPLC network branch and an HRF network branch; The HPLC network branch includes a CCO node, at least two PCO nodes and at least one STA node; the CCO node is connected to the at least one PCO node for communication based on HPLC; the at least one PCO node is connected to other PCO nodes and at least one STA node for communication based on HPLC; The HRF network branch includes the CCO node, the at least two PCO nodes and the at least one STA node; the CCO node is communicatively connected with at least one PCO node based on HRF; and the at least one PCO node is communicatively connected with other PCO nodes and at least one STA node based on HRF.

[0010] Optionally, the HPLC network branch is configured to use the HRF network branch for communication interaction when an abnormality occurs, and repair the HPLC network branch through the HRF network branch; The HRF network branch is configured to use the HPLC network branch for communication interaction when an abnormality occurs, and to repair the HRF network branch through the HPLC network branch.

[0011] Optionally, the HPLC network branch is specifically configured such that when one of the PCO nodes fails or its communication link fails, the STA node connected to the one PCO node uses another PCO node connected to it in the HRF network branch to upload data, and the CCO node uses the other PCO node to send data to the STA node; The HRF network branch is specifically configured such that when one of the PCO nodes fails or its communication link fails, the STA node connected to the one PCO node uses another PCO node connected to it in the HPLC network branch to upload data, and the CCO node uses the other PCO node to send data to the STA node.

[0012] Optionally, the HPLC network branch is specifically configured such that if one of the STA nodes cannot receive data from the CCO node, the STA node uses the HRF network branch to initiate a proxy change request message to the CCO node; the CCO node sends a corresponding proxy change request confirmation message to the STA node through the HRF network branch based on the received proxy change request message; the STA node changes the PCO node connected to it in the HPLC network branch based on the received proxy change request confirmation message; The HRF network branch is specifically configured such that if one of the STA nodes cannot receive data from the CCO node, the STA node uses the HPLC network branch to initiate a proxy change request message to the CCO node; the CCO node sends a corresponding proxy change request confirmation message to the STA node through the HPLC network branch based on the received proxy change request message; the STA node changes the PCO node to which it is connected in the HRF network branch based on the received proxy change request confirmation message.

[0013] Optionally, the HPLC network branch is specifically configured such that if the CCO node cannot receive data sent by a STA node through it, the CCO node sends a route repair request message to the STA node through the HRF network branch; the STA node sends a corresponding route repair request reply message to the CCO node through the HRF network branch; the CCO node sends a route repair response message to the STA node through the HRF network branch; the STA node changes the PCO node connected to it in the HPLC network branch according to the route repair response message; The HRF network branch is specifically configured such that if the CCO node cannot receive data sent by a STA node through it, the CCO node sends a route repair request message to the STA node through the HPLC network branch; the STA node sends a corresponding route repair request reply message to the CCO node through the HPLC network branch; the CCO node sends a route repair response message to the STA node through the HPLC network branch; and the STA node changes the PCO node connected to it in the HRF network branch according to the route repair response message.

[0014] Optionally, in the routing table entry of each node, the highest bit of TEI corresponds to different values ​​for the HPLC network branch and the HRF network branch, and the lower 11 bits of TEI are the actual TEI in the HPLC+HRF network.

[0015] The beneficial effect of the present invention is that the dual-network dual-link based on HPLC+HRF constructed by the present invention includes an HPLC network branch and an HRF network branch with different routes but can be alternatives to each other. When an abnormality occurs in one of the network branches, another normal network branch can be used to replace it to complete data transmission; the abnormal network branch can also be repaired by another normal network branch. Therefore, the dual-network dual-link structure based on HPLC+HRF of the present invention can not only improve the stability of the overall network, but also fully possess the complementary advantages of dual networks and dual links. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A topological diagram of a dual network dual link in the prior art; Figure 2 A topological diagram of a dual network dual link based on HPLC+HRF provided in an embodiment of the present invention; Figure 3 HPLC+HRF dual-network dual-link routing structure and routing table entries in the embodiment of the present invention; Figure 4 Schematic diagram of route repair from STA to CCO in an embodiment of the present invention; Figure 5 The figure is a schematic diagram of route repair from CCO to STA in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0018] The key concept of the present invention is to construct a dual network dual link based on HPLC+HRF, including an HPLC network branch and an HRF network branch with different routes but which can serve as alternatives to each other.

[0019] The technical terms involved in the present invention are explained in Table 1: Embodiment 1

[0020] Please refer to Figure 2 , Figure 2 A topological diagram of a dual-network dual-link based on HPLC+HRF provided in an embodiment of the present invention.

[0021] This embodiment provides a dual-network dual-link routing method based on HPLC+HRF, which is implemented based on a dual-network dual-link routing structure based on HPLC+HRF.

[0022] like Figure 2 As shown, the construction of the dual-network dual-link routing structure of HPLC+HRF follows the network branch principle. The network branch consists of nodes directly connected to the CCO node and all affiliated nodes, specifically including the HPLC network branch and the HRF network branch: The HPLC network branch includes a CCO node, at least two PCO nodes and at least one STA node; the CCO node is connected to the at least one PCO node for communication based on HPLC; the at least one PCO node is connected to other PCO nodes and at least one STA node for communication based on HPLC; The HRF network branch includes the CCO node, the at least two PCO nodes and the at least one STA node; the CCO node is communicatively connected with at least one PCO node based on HRF; and the at least one PCO node is communicatively connected with other PCO nodes and at least one STA node based on HRF.

[0023] The network branching principle stipulates that in a dual-network dual-link routing structure, the link type of the network access node that the network branch can accept depends on the type of the network branch. Therefore, in the HPLC network branch described in this embodiment, the node type directly connected to the CCO node is an HPLC link, and only network access requests of the HPLC link type are accepted; in the HRF network branch, the node link type directly connected to the CCO node is an HRF link, and only network access requests of the HRF link type are accepted. It can be seen that the HPLC network constructed by the HPLC network branch and the HRF network constructed by the HRF network branch are completely independent network structures; but since the nodes contained in the two are exactly the same, the two can cooperate with each other and can also become alternatives to each other, and jointly complete communication services through dual links.

[0024] It can be understood that based on the above-mentioned routing structure characteristics, the HPLC network and the HRF network corresponding to the HPLC network branch and the HRF network branch are independent of each other and can cooperate with each other to jointly complete the communication service through the dual link. That is, based on the routing method of the dual-network dual-link routing structure, the HPLC network can be used for data transmission while the HRF network is used for data transmission, and the HRF network can be used for data transmission while the HPLC network is used for data transmission.

[0025] In addition, the two are alternatives to each other. When an abnormality occurs in one of the HPLC network branch and the HRF network branch, the abnormal network branch will not affect the other network branch, and the other network branch can still perform data transmission and network maintenance normally; and the abnormal network branch can also be quickly repaired through the normal network branch.

[0026] Specifically, the HPLC network described in this embodiment is completely composed of HPLC communication links and is independent of the HRF network. Even if the HPLC network node fails, other nodes in the HRF network are not affected, and the HRF network can still perform data transmission and network maintenance normally, and the abnormal HPLC network can also be quickly repaired through the HRF network. The HRF network is completely composed of HRF communication links and is independent of the HPLC network. Even if the HRF network node fails, other nodes in the HPLC network are not affected, and the HPLC network can still perform data transmission and network maintenance normally, and the abnormal HRF network can be quickly repaired through the HPLC network.

[0027] For example, the same message can be sent through the HPLC network and the HRF network respectively, and the received same message can be filtered at the receiving end. During the communication process, the message is transmitted in the HPLC network and the HRF network respectively, which are independent of each other. Even if one of the networks is disturbed or a proxy node fails, the other network can complete the transmission normally and inform the CCO node of the abnormal situation. After the CCO node perceives the network failure, it can perform real-time routing repair through the normal working network.

[0028] Different business messages are transmitted through the HPLC network and the HRF network respectively, and the overall bandwidth utilization is improved by utilizing the characteristics of dual networks and dual links. During the communication process, different business messages are transmitted in the HPLC network and the HRF network respectively, and arrive at the receiving end independently of each other. Even if one of the networks is disturbed or a proxy node fails, the other network can complete the transmission of the remaining data normally and inform the CCO network node of the abnormal situation. After the transmission is completed, the CCO node immediately repairs the faulty network through the normal network.

[0029] Of course, you can also designate one network to be dedicated to data transmission and the other network to be dedicated to network maintenance, so as to improve the overall real-time performance of the HPLC+HRF network.

[0030] As can be seen from the above, the dual-network dual-link routing structure based on HPLC+HRF provided in this embodiment has an HPLC network and an HRF network corresponding to the HPLC network branch and the HRF network branch, which are independent of each other but can cooperate with each other and can also serve as alternatives to each other. The routing method based on the dual-network dual-link routing structure can reduce the impact of the simultaneous failure of dual links caused by failure of proxy nodes or multiple interferences, thereby improving the stability of the HPLC+HRF network as a whole; in addition, it also has the advantages of HPLC+HRF dual links.

[0031] In some specific implementations of this embodiment, Figure 2The networking process of dual network dual link based on HPLC+HRF is shown as follows: In the early stage of networking, PCO1 and PCO2 nodes are connected to the CCO node through HPLC link and HRF link respectively, forming HPLC network branch and HRF network branch respectively. Each network branch includes the node directly connected to the CCO node link and all the subordinate nodes under the node, that is, the CCO node and PCO1 node constitute the HPLC network branch; the CCO node and PCO2 node constitute the HRF network branch.

[0032] Since the dual-network dual-link routing structure of HPLC+HRF follows the network branch principle, the network branch principle stipulates that the link type of the access node that the network branch can accept depends on the type of network branch. Therefore, the HPLC network branch only accepts the access application of the HPLC link, that is, the HRF link of the PCO1 node can only be accessed by applying for the HRF network. Figure 2 As shown, the PCO1 node has been connected to the network through the HPLC link to form an HPLC network branch, and its HRF link needs to be connected to the network for the second time through the PCO2 node on the HRF network branch. Similarly, the PCO2 node is connected to the network through the HRF link to form an HRF network branch, and its HPLC link needs to be connected to the network for the second time through the PCO1 node on the HPLC network branch. It is necessary to explain that the secondary network access means that in the dual-network dual-link network of HPLC+HRF, the node to be connected to the network accesses the network through one link (HPLC link or HRF link), which is called the first network access; after the first network access is successful, the node applies for network access again through another link, which is called the second network access, thereby forming a dual network.

[0033] Furthermore, if the STA3 node to be connected to the network is connected to the PCO1 node on the HPLC network branch through the HPLC link, then its HRF link should be connected to the network through other HRF network branches. Figure 2 As shown, the HRF link of the STA3 node can select the PCO2 node on the HRF network branch for secondary network access.

[0034] After the network is established, the following Figure 2 The topology of the dual network dual link based on HPLC+HRF is shown in FIG. Figure 2 The HPLC network topology and HRF network topology shown are independent of each other but can cooperate with and complement each other. Embodiment 2

[0035] See also Figure 2 and Figure 3 .in, Figure 3 HPLC+HRF dual-network dual-link routing structure and routing table entries in the embodiment of the present invention.

[0036] This embodiment is further expanded on the above embodiment, and provides a detailed description of the communication interaction process of the dual-network dual-link routing structure based on HPLC+HRF.

[0037] According to the HPLC+HRF dual-mode protocol, combined Figure 2 The HPLC+HRF dual-network dual-link network topology can be obtained Figure 3 The HPLC+HRF dual-network dual-link routing structure and routing table entries are shown.

[0038] In this embodiment, based on the HPLC+HRF dual-mode protocol, the highest bit 11 of TEI (12 bits in total) is used as a mark to distinguish the HPLC link from the HRF link; when the highest bit 11 of TEI is 0, it indicates the HPLC link, and when it is 1, it indicates the HRF link. Here, TEI is usually expressed in hexadecimal, such as Figure 3 In the CCO routing table entry, when STA3's TEI is 804 (in hexadecimal), it represents its HRF link, and the corresponding highest bit 11 is 1, that is, 100000000100 (hexadecimal 804 is expanded to binary, the leftmost is bit 11, and the rightmost is bit 0); and the lower 11 bits of TEI represent its actual TEI in the HPLC+HRF dual-network dual-link routing. It can be understood that the above-mentioned specific values ​​of the TEI bits are only used to show the HPLC+HRF dual-network dual-link routing structure and routing table entries of this embodiment. The method of constructing the HPLC+HRF dual-network dual-link routing structure and routing table entries is not limited to this.

[0039] like Figure 3 As shown, each node in the HPLC+HRF dual-network dual-link routing structure has its own TEI. For the convenience of analysis, the HPLC+HRF dual-network dual-link routing structure is split into HPLC network routing and HRF network routing. Among them, the HPLC network routing, that is, the HPLC network branch, corresponds to the HPLC link, so the highest bit of TEI of each node in the HPLC network is always 0. The HRF network, that is, the HRF network branch, corresponds to the HRF link, so the highest bit of TEI in the HRF network is always 1. Therefore, according to the HPLC+HRF dual-mode protocol routing table item construction rules, the following can be obtained: Figure 3 As shown, the "routing table entry of CCO", "routing table entry of PCO1", "routing table entry of PCO2" and "routing table entry of STA3" in the HPLC+HRF dual-network dual-link routing structure.

[0040] Here, it is assumed that the CCO node needs to send a message to the STA3 node. As mentioned above, the highest bit 11 is used to mark the link type, so the actual TEI of the STA3 node in the HPLC+HRF dual network is 4, corresponding to the TEI of the HPLC link = 004 and the TEI of the HRF link = 804. The CCO node finds by querying its own routing table that the target delivery node STA3 node corresponds to the TEI of the HPLC link = 004 and the TEI of the HRF link = 804; if the CCO node wants to access nodes with TEI = 004 and TEI = 804, it can be forwarded through the relay node with TEI = 002 in the HPLC link; it can also be forwarded through the relay node with TEI = 803 in the HRF link (corresponding to the HRF network and HRF link). Of course, whether to forward the message through the relay node with TEI=002 or the relay node with TEI=803, or even through the relay node with TEI=002 and the relay node with TEI=803 at the same time, all depends on the decision of the CCO node. This is the advantage brought by the dual-network dual-link routing structure of HPLC+HRF. After the CCO node sends the message to the relay node with TEI=002 and / or the relay node with TEI=803, the relay node with TEI=002 queries its own routing table entry, and the target delivery node TEI=004 determines the TEI=004 of the next node, so the message is forwarded to the node with TEI=004, thereby completing the CCO node sending the message to the STA3 node through the HPLC link. The relay node with TEI=803 queries its own routing table entry to send the message. The target delivery node TEI=804 determines the next node's TEI=804, so it forwards the message to the node with TEI=804, thereby completing the CCO node sending the message to the STA3 node through the HRF link.

[0041] It can be understood that the route from the CCO node to any node can pass through the HPLC network branch (HPLC link) and the HRF network branch (HRF link) at the same time, and has the characteristics of dual networks and dual links. Therefore, the HPLC+HRF dual network and dual link routing structure provided in this embodiment can not only improve the overall network stability, but also fully have the advantages of dual networks and dual links.

[0042] Below, we will combine several simple application examples of dual networks and dual links to help you understand.

[0043] Example 1: The same message is sent through the HPLC network and the HRF network. The receiving node filters the received identical messages. This dual-link transmission method has high stability. Figure 2 and Figure 3There are dual networks and dual links between the CCO node and the STA3 node, which are the HPLC link CCO-PCO1-STA3 in the HPLC network branch and the HRF link CCO-PCO2-STA3 in the HRF network branch. The same message is transmitted between the CCO node and the STA3 node through these two paths, and the receiving node filters the same message. During the transmission process, the intermediate nodes on the HPLC link path are different from the intermediate nodes on the HRF link, that is, the relay nodes on the HPLC link path are different from the relay nodes on the HRF link path. Therefore, during the transmission process, if the intermediate nodes on one of the links are abnormal, it will not affect the intermediate nodes on the other link, which makes it very stable when sending the same message through the HPLC network and the HRF network.

[0044] Example 2: Use dual networks to transmit different service messages respectively, and use the dual-network dual-link feature to improve overall bandwidth utilization. Figure 2 and Figure 3 There are two networks and two links between the CCO node and the STA3 node, namely the HPLC link CCO-PCO1-STA3 in the HPLC network and the HRF link CCO-PCO2-STA3 in the HRF network. When multiple business data need to be transmitted quickly, different business data can be sent simultaneously through the HPLC link and the HRF link, which can significantly improve bandwidth utilization compared to single-link transmission.

[0045] Example 3: One network can be used for data transmission, and the other network can be used for network maintenance. Since the HPLC network and the HRF network in the HPLC+HRF dual-network dual-link network topology are independent of each other, using different networks for data transmission and network maintenance is also a feasible solution. Embodiment 3

[0046] Please refer to Figure 2 , Figure 4 and Figure 5 .in, Figure 4 Schematic diagram of route repair from STA to CCO in an embodiment of the present invention; Figure 5 The figure is a schematic diagram of route repair from CCO to STA in an embodiment of the present invention.

[0047] This embodiment is further expanded based on any of the above embodiments, and specifically describes in detail the solution adopted when facing the problem of simultaneous failure of dual links caused by failure of the proxy node or multiple interferences.

[0048] It can be seen from the above embodiments that the HPLC network branch only has HPLC links; the HRF network branch only has HRF links; at the same time, the relay nodes on the path to the CCO node for the same node in the HPLC network branch and the HRF network branch are different. Therefore, when any relay node or its communication link in any network branch fails, another network branch can be used to transmit data through other relay nodes to ensure that the data is transmitted to the destination without error.

[0049] In this embodiment, when an abnormality occurs in the HPLC network branch or the HRF network branch, another normal network branch is used for communication interaction. Figure 2 Understand, including: When a PCO node in the HPLC network branch or the HRF network branch fails or its communication link fails, the STA node connected to the PCO node uses another PCO node connected to it in another normal network branch to upload data, and the CCO node sends data to the STA node through the other PCO node.

[0050] For example, Figure 2 When the PCO1 node in the HPLC network branch or the HPLC link between it and the CCO node is disturbed and fails, although the HPLC link between the PCO1 node and the STA3 node in the HPLC network branch is affected. However, other nodes in the HRF network branch except the PCO1 node will not be affected, especially the HRF link between the PCO1 node and the STA3 node is normal. Therefore, the STA3 node can use another proxy node connected to it in the normal HRF network branch, namely the PCO2 node, to upload data to the CCO node through the unaffected HRF link between the STA3 node and PCO2. Correspondingly, the CCO node will also use the normal HRF network branch to send data to the STA3 node through the PCO2 node.

[0051] At the same time, when any relay node or its communication link in any network branch fails, another normally working network branch can be used to repair the abnormal network branch in real time, realizing real-time routing repair of dual networks.

[0052] In this embodiment, when an abnormality occurs in the HPLC network branch or the HRF network branch, the abnormal network branch is repaired through another normal network branch, specifically including route repair in two directions: (1) Route repair from STA to CCO If any STA node in the HPLC network branch or the HRF network branch cannot receive the ACK data of the CCO node, it can be considered that the corresponding network branch is abnormal.

[0053] It can be understood that during the communication interaction between nodes, assuming that node A sends data to the CCO node via the proxy node B, if the proxy node B successfully receives the data, it will reply to node A, and the CCO node will successfully receive the data and will also reply to node A. Therefore, if node A does not receive a reply from the proxy node B, it means that the proxy node B is faulty or the communication link between node B and node A is faulty; or if it does not receive a reply from the CCO node, it means that the communication link between the proxy node B and the CCO node is faulty.

[0054] In the face of the above situation, the STA node that fails to receive ACK data in this embodiment will use another normal network branch to initiate an agent change request message to the CCO node; after the CCO node receives the agent change request message, it will send a corresponding agent change request confirmation message to the STA node through the other normal network branch; the STA node changes the PCO node connected to it in the network branch that cannot receive data from the CCO node (that is, the network branch where the abnormality is confirmed) based on the received agent change request confirmation message.

[0055] like Figure 4 As shown in the figure, assuming that the PCO3 node fails, when the STA2 node uploads data to the CCO node through the HPLC network branch, the STA2 node will not be able to receive the response data replied by PCO3; then the STA2 node will use the normal HRF network branch to initiate a proxy change request message to the CCO node via the PCO2 node; the CCO node sends the corresponding proxy change request confirmation message through the PCO2 node; accordingly, the STA2 node changes its directly connected proxy node in the HPLC network branch from the abnormal PCO3 node to the normal PCO1 node, thereby removing the abnormal PCO3 node from the HPLC network branch, thereby achieving the purpose of repairing the HPLC network branch routing.

[0056] It can be understood that based on the dual-network dual-link routing structure based on HPLC+HRF provided in this embodiment, the route repair in the STA to CCO direction only requires one round trip (one proxy change request and one proxy change confirmation) to achieve route repair, which has the advantages of fast and efficient repair speed.

[0057] (2) Route repair from CCO to STA If the CCO node cannot receive the data sent by the designated STA node through the HPLC network branch or the HRF network branch, it is considered that the corresponding network branch is abnormal.

[0058] When faced with the above situation, the CCO node that fails to receive the reply message in this embodiment will send a route repair request message to the designated STA node through another normal network branch; the STA node sends the corresponding route repair request reply message to the CCO node through the other normal network branch; the CCO node sends a route repair response message to the STA node through the other normal network branch; the STA node changes the PCO node connected to it in the network branch that cannot send data to the CCO node (i.e., the network branch where the abnormality is confirmed to have occurred) based on the route repair response message.

[0059] like Figure 5 As shown in the figure, assuming that the PCO3 node fails, when the CCO node sends data to the STA2 node through the HPLC network branch, the CCO node will not be able to receive the reply message from the STA2 node, specifically, it will not be able to receive the reply message from the PCO3 node during the transmission process. Then the CCO node will use the normal HRF network branch to send a route repair response message to the STA2 node via the PCO2 node; the STA2 node sends the corresponding route repair request reply message to the CCO node through the PCO2 node; the CCO node then sends a route repair response message to the STA2 node through the PCO2 node; the STA2 node changes its directly connected proxy node in the HPLC network branch from the abnormal PCO3 node to the normal PCO1 node, thereby removing the abnormal PCO3 node from the HPLC network branch, and achieving the purpose of repairing the HPLC network branch route.

[0060] In some specific implementations of this embodiment, if both the HPLC network branch and the HRF network branch fail, they can be repaired in the following manner: The node searched by the routing request message is searched through the routing request message. The searched node needs to reply with the routing repair reply message within the predetermined time. When forwarding the routing reply message, the node can use the link confirmation request message to initiate a link evaluation to confirm the next destination site. After forwarding the confirmed link multiple times, the routing repair reply is finally completed. The CCO sends a routing repair response message to complete the routing change.

[0061] As can be seen from the above, the dual-network dual-link routing structure and routing method based on HPLC+HRF provided in this embodiment are compared with the dual-receive dual-transmit network topology structure and routing method in the prior art. When the link at the same position in the link fails or the proxy node fails, the proxy node and its subsidiary nodes of the existing dual-receive dual-transmit network topology structure will be affected; while the HPLC+HRF dual-network dual-link network topology structure of this embodiment forms a dual network branch, and the dual network branches are independent of each other. When they are affected in the same way, only the proxy node and its subsidiary nodes of one of the network branches are affected, and only the proxy node or even no node of the other network branch is affected. This embodiment can reduce the scope of the network affected, and at the same time, it can also perform real-time repair of another abnormal network branch through a normally working network branch, that is, to achieve real-time routing repair of the dual network, thereby improving the stability of the HPLC+HRF communication network as a whole. Embodiment 4

[0062] See also Figure 4 and Figure 5 Based on the above embodiments, this embodiment provides a specific application example, which fully describes the process from route establishment to how to perform real-time dual network route repair to restore communication when a fault occurs.

[0063] S1: The CCO node and STA node are powered on, the STA node enters the listening state, and the CCO node starts to send central beacons periodically after initialization. S2: After the STA node monitors the central beacon, it starts to initiate association requests one after another. Here, it is assumed that both the PCO1 node and the PCO2 node monitor the central beacon of the CCO node. The PCO1 node initiates an association request message to the CCO node through the HPLC link. After the CCO node sends an association confirmation message, the PCO1 node successfully accesses the network for the first time. Similarly, the PCO2 node successfully accesses the network for the first time through the HRF link. S3: While the CCO node distributes proxy beacons to the PCO1 node and the PCO2 node, the CCO node continues to send central beacons, and arranges the PCO1 node to send HPLC proxy beacons and arranges the PCO2 node to send HRF proxy beacons; S4: The PCO1 node monitors the HRF proxy beacon of the PCO2 node and attempts to send an association request message to the PCO2 node through the HRF link. The PCO2 node further forwards the association request message of the PCO1 node to the CCO node, and the CCO node replies with an association confirmation message. Finally, the PCO2 node successfully accesses the network for the second time through the HRF link, and the PCO1 node forms a dual-network dual-link routing structure. S5: After the PCO2 node monitors the HPLC proxy beacon of the PCO1 node, it attempts to send an association request message to the PCO1 node through the HPLC link. The PCO1 node further forwards the association request message of the PCO2 node to the CCO node, and the CCO node replies with an association confirmation message. Finally, the PCO2 node successfully accesses the network for the second time through the HPLC link, and the PCO2 node forms a dual-network dual-link routing structure; S6: Similarly, the PCO3 node uses the PCO1 node as the HPLC proxy node and the PCO2 node as the HRF proxy node to form a dual-network dual-link routing structure, and is arranged by the CCO node to send HPLC proxy beacons; S7: After listening to the proxy beacon, STA2 and STA3 nodes respectively enter the network for the second time and join the dual network structure to form Figure 4 The dual network dual link topology shown; S8: The route from STA to CCO is repaired as follows Figure 4 , Taking the STA2 node as an example, CCO-PCO1-PCO3-STA2 is its HPLC link in the HPLC network, and CCO-PCO2-STA2 is its HRF link in the HRF network. The STA2 node and the CCO node can transmit data through these two links without affecting each other; S9: Figure 4 As shown in the left figure, when the PCO3 node communication is suddenly damaged, the CCO-PCO1-PCO3-STA2 link of the STA2 node, that is, the HPLC link, becomes abnormal. The STA2 node does not receive the ACK from the CCO node, which can be judged as the link failure. At this time, the proxy change request message is initiated to the CCO node through the HRF link CCO-PCO2-STA2. After the CCO node replies to the proxy change request confirmation message, the route repair is completed (the route structure after the repair is as shown in the figure below). Figure 4 as shown in the right figure); S10: After the route is repaired, Figure 4 As shown in the right figure, a new HPLC link CCO-PCO1-STA2 will be formed. It can be understood that the HPLC network is repaired through the HRF network, and the HRF network can also be repaired through the HPLC network.

[0064] S11: The route from CCO to STA is repaired as follows Figure 5 As shown, taking the STA2 node as an example, CCO-PCO1-PCO3-STA2 is its HPLC link in the HPLC network, and CCO-PCO2-STA2 is its HRF link in the HRF network. The STA2 node and the CCO node can transmit data through these two links without affecting each other. S12: Figure 5 As shown in the left figure, when the PCO3 communication is suddenly damaged, the CCO-PCO1-PCO3-STA2 link of the STA2 node, that is, the HPLC link, becomes abnormal. The CCO node cannot receive the reply message from STA and can determine that the link is faulty. At this time, a routing repair request message is initiated to STA through the HRF link CCO-PCO2-STA2. S13: After receiving the route repair request message from the CCO node, the STA2 node replies with a route repair request reply message to the CCO node through the HRF link CCO-PCO2-STA2; S14: After receiving the route repair request reply message from the STA2 node, the CCO node sends a route repair response message to the STA2 node through the HRF link CCO-PCO2-STA2 to inform the STA2 node of the route change information; S15: After receiving the route repair response message sent by the CCO node, the STA2 node changes its own route information, and the repair is completed (the route structure after repair is as follows Figure 5 as shown in the right figure); S16: After the route is repaired, Figure 5 As shown in the right figure, a new HPLC link CCO-PCO1-STA2 will be formed. It can be understood that the HPLC network is repaired through the HRF network, and the HRF network can also be repaired through the HPLC network. Embodiment 5

[0065] This embodiment is based on any of the above embodiments and provides a dual-network dual-link routing system based on HPLC+HRF, including a dual-network dual-link consisting of an HPLC network branch and an HRF network branch; The HPLC network branch includes a CCO node, at least two PCO nodes and at least one STA node; the CCO node is connected to the at least one PCO node for communication based on HPLC; the at least one PCO node is connected to other PCO nodes and at least one STA node for communication based on HPLC; The HRF network branch includes the CCO node, the at least two PCO nodes and the at least one STA node; the CCO node is communicatively connected with at least one PCO node based on HRF; and the at least one PCO node is communicatively connected with other PCO nodes and at least one STA node based on HRF.

[0066] In this embodiment, the HPLC network branch is configured to use the HRF network branch for communication interaction when an abnormality occurs, and repair the HPLC network branch through the HRF network branch; The HRF network branch is configured to use the HPLC network branch for communication interaction when an abnormality occurs, and to repair the HRF network branch through the HPLC network branch.

[0067] In this embodiment, the HPLC network branch is specifically configured such that when one of the PCO nodes fails or its communication link fails, the STA node connected to the one PCO node uses another PCO node connected to it in the HRF network branch to upload data, and the CCO node uses the other PCO node to send data to the STA node; The HRF network branch is specifically configured such that when one of the PCO nodes fails or its communication link fails, the STA node connected to the one PCO node uses another PCO node connected to it in the HPLC network branch to upload data, and the CCO node uses the other PCO node to send data to the STA node.

[0068] In this embodiment, the HPLC network branch is specifically configured such that if one of the STA nodes cannot receive data from the CCO node, the STA node uses the HRF network branch to initiate an agent change request message to the CCO node; the CCO node sends a corresponding agent change request confirmation message to the STA node through the HRF network branch based on the received agent change request message; the STA node changes the PCO node connected to it in the HPLC network branch based on the received agent change request confirmation message; The HRF network branch is specifically configured such that if one of the STA nodes cannot receive data from the CCO node, the STA node uses the HPLC network branch to initiate a proxy change request message to the CCO node; the CCO node sends a corresponding proxy change request confirmation message to the STA node through the HPLC network branch based on the received proxy change request message; the STA node changes the PCO node to which it is connected in the HRF network branch based on the received proxy change request confirmation message.

[0069] In this embodiment, the HPLC network branch is specifically configured such that if the CCO node cannot receive data sent by a STA node through it, the CCO node sends a route repair request message to the STA node through the HRF network branch; the STA node sends a corresponding route repair request reply message to the CCO node through the HRF network branch; the CCO node sends a route repair response message to the STA node through the HRF network branch; the STA node changes the PCO node connected to it in the HPLC network branch according to the route repair response message; The HRF network branch is specifically configured such that if the CCO node cannot receive data sent by a STA node through it, the CCO node sends a route repair request message to the STA node through the HPLC network branch; the STA node sends a corresponding route repair request reply message to the CCO node through the HPLC network branch; the CCO node sends a route repair response message to the STA node through the HPLC network branch; and the STA node changes the PCO node connected to it in the HRF network branch according to the route repair response message.

[0070] In this embodiment, in the routing table entry of each node, the highest bit of TEI corresponds to different values ​​for the HPLC network branch and the HRF network branch, and the lower 11 bits of TEI are the actual TEI in the HPLC+HRF network.

[0071] The dual-network dual-link routing system based on HPLC+HRF provided in this embodiment includes an HPLC network branch and an HRF network branch with different routes but can be alternatives to each other. When an abnormality occurs in one of the network branches, another normal network branch can be used to replace it to complete data transmission; the abnormal network branch can also be repaired by another normal network branch. Therefore, the dual-network dual-link structure based on HPLC+HRF can not only improve the stability of the overall network, but also fully possess the complementary advantages of dual networks and dual links.

[0072] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A dual-network dual-link routing method based on HPLC+HRF, characterized in that: It includes a dual network dual link consisting of an HPLC network branch and an HRF network branch; The HPLC network branch includes a CCO node, at least two PCO nodes and at least one STA node; the CCO node is connected to the at least one PCO node for communication based on HPLC; the at least one PCO node is connected to other PCO nodes and at least one STA node for communication based on HPLC; The HRF network branch includes the CCO node, the at least two PCO nodes and the at least one STA node; the CCO node is connected to the at least one PCO node for communication based on HRF; the at least one PCO node is connected to the other PCO nodes and the at least one STA node for communication based on HRF; When an abnormality occurs in the HPLC network branch or the HRF network branch, another normal network branch is used for communication interaction, and the abnormal network branch is repaired through the other normal network branch.

2. The dual-network dual-link routing method based on HPLC+HRF as claimed in claim 1, characterized in that: When an abnormality occurs in the HPLC network branch or the HRF network branch, another normal network branch is used for communication interaction, including: When a PCO node in the HPLC network branch or the HRF network branch fails or its communication link fails, the STA node connected to the one PCO node uses another PCO node connected to it in another normal network branch to upload data, and the CCO node uses the other PCO node to send data to the STA node.

3. The dual-network dual-link routing method based on HPLC+HRF as claimed in claim 1, characterized in that, The repairing of the abnormal network branch by using another normal network branch includes: If a STA node in the HPLC network branch or the HRF network branch cannot receive data from the CCO node, the STA node uses another normal network branch to initiate an agent change request message to the CCO node; the CCO node sends a corresponding agent change request confirmation message to the STA node through the other normal network branch based on the received agent change request message; the STA node changes the PCO node connected to it in the network branch that cannot receive data from the CCO node based on the received agent change request confirmation message; If the CCO node cannot receive data sent by a STA node through the HPLC network branch or the HRF network branch, the CCO node sends a routing repair request message to the STA node through another normal network branch; the STA node sends a corresponding routing repair request reply message to the CCO node through another normal network branch; the CCO node sends a routing repair response message to the STA node through another normal network branch; the STA node changes the PCO node connected to it in the abnormal network branch according to the routing repair response message.

4. The dual-network dual-link routing method based on HPLC+HRF as claimed in claim 1, characterized in that: In the routing table entry of each node, the highest bit of TEI corresponds to different values ​​for the HPLC network branch and the HRF network branch, and the lower 11 bits of TEI are the actual TEI in the HPLC+HRF network.

5. A dual-network dual-link routing system based on HPLC+HRF, characterized in that: It includes a dual network dual link consisting of an HPLC network branch and an HRF network branch; The HPLC network branch includes a CCO node, at least two PCO nodes and at least one STA node; the CCO node is connected to the at least one PCO node for communication based on HPLC; the at least one PCO node is connected to other PCO nodes and at least one STA node for communication based on HPLC; The HRF network branch includes the CCO node, the at least two PCO nodes and the at least one STA node; the CCO node is communicatively connected with at least one PCO node based on HRF; and the at least one PCO node is communicatively connected with other PCO nodes and at least one STA node based on HRF.

6. The dual-network dual-link routing system based on HPLC+HRF as claimed in claim 5, characterized in that: The HPLC network branch is configured to use the HRF network branch for communication interaction when an abnormality occurs, and repair the HPLC network branch through the HRF network branch; The HRF network branch is configured to use the HPLC network branch for communication interaction when an abnormality occurs, and to repair the HRF network branch through the HPLC network branch.

7. The dual-network dual-link routing system based on HPLC+HRF as claimed in claim 6, characterized in that: The HPLC network branch is specifically configured such that when one of the PCO nodes fails or its communication link fails, the STA node connected to the one PCO node uses another PCO node connected to it in the HRF network branch to upload data, and the CCO node uses the other PCO node to send data to the STA node; The HRF network branch is specifically configured such that when one of the PCO nodes fails or its communication link fails, the STA node connected to the one PCO node uses another PCO node connected to it in the HPLC network branch to upload data, and the CCO node uses the other PCO node to send data to the STA node.

8. The dual-network dual-link routing system based on HPLC+HRF as claimed in claim 6, characterized in that: The HPLC network branch is specifically configured such that if one of the STA nodes cannot receive data from the CCO node, the STA node uses the HRF network branch to initiate a proxy change request message to the CCO node; the CCO node sends a corresponding proxy change request confirmation message to the STA node through the HRF network branch based on the received proxy change request message; the STA node changes the PCO node connected to it in the HPLC network branch based on the received proxy change request confirmation message; The HRF network branch is specifically configured such that if one of the STA nodes cannot receive data from the CCO node, the STA node uses the HPLC network branch to initiate a proxy change request message to the CCO node; the CCO node sends a corresponding proxy change request confirmation message to the STA node through the HPLC network branch based on the received proxy change request message; the STA node changes the PCO node to which it is connected in the HRF network branch based on the received proxy change request confirmation message.

9. The dual-network dual-link routing system based on HPLC+HRF as claimed in claim 6, characterized in that: The HPLC network branch is specifically configured such that if the CCO node cannot receive data sent by a STA node through it, the CCO node sends a route repair request message to the STA node through the HRF network branch; the STA node sends a corresponding route repair request reply message to the CCO node through the HRF network branch; The CCO node sends a route repair response message to the one STA node through the HRF network branch; the one STA node changes the PCO node connected to it in the HPLC network branch according to the route repair response message; The HRF network branch is specifically configured such that if the CCO node cannot receive data sent by a STA node through it, the CCO node sends a route repair request message to the STA node through the HPLC network branch; the STA node sends a corresponding route repair request reply message to the CCO node through the HPLC network branch; The CCO node sends a route repair response message to the one STA node through the HPLC network branch; the one STA node changes the PCO node connected to it in the HRF network branch according to the route repair response message.

10. The dual-network dual-link routing system based on HPLC+HRF as claimed in claim 6, characterized in that: In the routing table entry of each node, the highest bit of TEI corresponds to different values ​​for the HPLC network branch and the HRF network branch, and the lower 11 bits of TEI are the actual TEI in the HPLC+HRF network.

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