CN115474163B - Anti-interference tunnel real-time communication method and system based on MESH technology - Google Patents
Anti-interference tunnel real-time communication method and system based on MESH technology Download PDFInfo
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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Abstract
The application discloses an anti-interference tunnel real-time communication method and system based on an MESH technology, and relates to the technical field of network communication. It comprises the following steps: numbering and grouping all MESH nodes arranged in the tunnel; when the links are associated, the nearest sub-node group from the communication equipment B selects the sub-node with the largest number in the node group as a root node, and the root node receives the broadcast sent by all the sub-nodes of the node group and compares the broadcast information and sends the broadcast information to the communication equipment B; when information is transmitted, the associated links transmit information through the sub-node groups, and each sub-node in the sub-node groups transmits the information to the sub-node of the corresponding number of the next sub-node group in a directional manner until reaching the sub-node group where the root node is located; the information propagation frequency between the child nodes is different from the information propagation frequency between the root node and the communication equipment. The application can realize the quick, lossless and anti-interference propagation of information in a long tunnel through the MESH network.
Description
Technical Field
The application relates to the technical field of network communication, in particular to an anti-interference tunnel real-time communication method and system based on an MESH technology.
Background
Conventional mine communication is mainly performed by a wired communication mode, and with the development of network technology and the increase of application requirements, underground wireless mobile communication is showing more and more advantages.
Currently, the underground wireless mobile communication generally adopts a leaky communication or an underground Personal Handyphone System (PHS) technology. Leakage communication is mainly limited by wiring conditions, and cannot cover a mining work surface without wiring conditions; the underground PHS is mainly applied to coal mines, the signal of the underground PHS is seriously influenced in the environment with interference (such as electric arcs for transporting electric locomotives), and the transmission rate of PHS is only 64 Kb/s-128 Kb/s, so that the requirement of novel real-time broadband communication cannot be met.
However, the real-time multimedia service requires that the tunnel communication system must be capable of providing high-speed image and data transmission rates (in the order of 1 Mb/s) and good communication performance guarantee, but the existing leaky communication technology or the underground Personal Handyphone System (PHS) technology cannot realize high-speed, lossless and anti-interference tunnel communication.
Disclosure of Invention
Based on the technical problems that the direct transmission type wireless network communication process provided in the background art can not achieve the purposes of high-speed, nondestructive and interference propagation of information in a long tunnel, the embodiment of the application provides an anti-interference tunnel real-time communication method and system based on the MESH technology.
The embodiment of the application provides an anti-interference tunnel real-time communication method based on an MESH technology, which comprises the following steps:
the communication equipment A broadcasts a link request packet, the communication equipment B confirms the interface state of the communication equipment A after receiving the broadcast link request packet and replies a link response packet, the communication equipment A confirms the interface state of the communication equipment B after receiving the link response packet, and sends a link confirmation packet, and the interface states of the communication equipment A and the communication equipment B are updated and associated with each other; the method also comprises the following steps:
uniformly numbering all MESH nodes arranged in a tunnel, grouping all the MESH nodes according to the numbering sequence, taking the MESH nodes divided into a group as a sub-node group, and numbering all the sub-node groups;
when the links are associated, the nearest sub-node group from the communication equipment B selects the sub-node with the largest number in the node group as a root node, and the root node receives the broadcast sent by all the sub-nodes of the node group and compares the broadcast information and sends the broadcast information to the communication equipment B;
when information is transmitted, the associated links transmit information through the sub-node groups, and each sub-node in the sub-node groups transmits the information to the sub-node of the corresponding number of the next sub-node group in a directional manner until reaching the sub-node group where the root node is located;
wherein the information propagation frequency between the child nodes is different from the information propagation frequency between the root node and the communication equipment; and information transmission between the sub-nodes adopts a 5.8GHz channel, and information transmission between the root node and the communication equipment adopts a 2.4GHz channel.
Further, the step of uniformly numbering all the MESH nodes arranged in the tunnel and grouping all the MESH nodes according to the numbering sequence specifically includes:
numbering all MESH nodes which are linearly arranged in the tunnel according to the front-back sequence;
for the numbered MESH nodes, starting from the first MESH node, every four MESH nodes are grouped.
Preferably, the method for anti-interference tunnel real-time communication based on the MESH technology provided by the embodiment of the application further comprises the following steps:
and if detecting that a new or damaged MESH node exists in the MESH network, recoding and grouping all the MESH nodes.
Preferably, the method for anti-interference tunnel real-time communication based on the MESH technology provided by the embodiment of the application further comprises the following steps:
after the request of link association is sent, if no reply is received within 10 milliseconds, the link association fails, and the communication equipment A does not update the interface state; otherwise, the link is successfully associated, and whether the link is disconnected or updated is detected every 3 seconds.
Further, the root node receives the broadcast sent by all the child nodes of the node group and compares the broadcast information and sends the compared broadcast information to the communication equipment B, which specifically includes:
the communication module of the root node extracts the data with the same corresponding bit and the maximum data duty ratio in the broadcast information codes sent by all the child nodes, combines the extracted bit data to form a new broadcast information code, and sends the new broadcast information code to the communication equipment B.
Preferably, each sub-node in the sub-node group directionally propagates information to the sub-node of the corresponding number of the next sub-node group, specifically including:
when the communication equipment broadcasts the link request packet to the nearest sub-node group, the sub-node group identifies the node type as the communication equipment, the propagation direction information in the link request packet is not modified, and the sub-node groups corresponding to the two sides of the sub-node group can both receive the link request packet;
after the child node groups on two sides identify that the node type is a MESH node, detecting that the propagation direction information in the link request packet is not initialized, comparing the number of the child node group with the number of the last node group, and modifying the propagation direction information in the link request packet;
the latter sub-node group preferentially detects whether the propagation direction is consistent with the variation of the number of the sub-node, and if so, the information is received and broadcast.
Preferably, the method for anti-interference tunnel real-time communication based on the MESH technology provided by the embodiment of the application further comprises the following steps:
after receiving the link request packet, the communication equipment B changes the interface state and does not receive other request packets;
and after receiving the link request packet, the communication equipment B transmits a link response packet to a corresponding sub-node group transmitting the link request packet, and after receiving a root node enabling signal of the link response packet, the sub-node state of the sub-node group with the largest number is changed into a root node, and the root node enabling signal, the root node number and the propagation direction are updated.
Preferably, the method for anti-interference tunnel real-time communication based on the MESH technology provided by the embodiment of the application further comprises the following steps:
after receiving the link response packet, the communication equipment A changes the interface state and does not receive other request packets;
after receiving the link response packet, the communication equipment A transmits a link acknowledgement packet to a corresponding sub-node group transmitting the link response packet, and after receiving a root node enabling signal of the link acknowledgement packet, the sub-node state with the largest number of the sub-node group is changed into a root node, and the root node enabling signal, the root node number and the propagation direction are updated.
Preferably, the method for anti-interference tunnel real-time communication based on the MESH technology provided by the embodiment of the application further comprises the following steps:
after receiving the link confirmation packet, the communication equipment B updates the interface state, establishes the link, and determines two root nodes in the link.
An anti-interference tunnel real-time communication system based on the MESH technology, comprising:
basic link association module: the communication equipment A broadcasts a link request packet, the communication equipment B confirms the interface state of the communication equipment A after receiving the broadcast link request packet and replies a link response packet, the communication equipment A confirms the interface state of the communication equipment B after receiving the link response packet, and sends a link confirmation packet, and the interface states of the communication equipment A and the communication equipment B are updated and associated with each other;
the numbering module is used for uniformly numbering all the MESH nodes arranged in the tunnel, grouping all the MESH nodes according to the numbering sequence, taking the MESH nodes divided into a group as a sub-node group, and numbering all the sub-node groups;
the link association module is used for selecting the child node with the largest number in the node group as a root node from the nearest child node group of the communication equipment B when the links are associated, and the root node receives the broadcast sent by all the child nodes of the node group and compares the broadcast information and sends the broadcast information to the communication equipment B;
the communication module is used for transmitting information through the sub-node groups by the associated links when information is transmitted, and each sub-node in the sub-node groups transmits the information to the sub-node of the corresponding number of the next sub-node group in a directional manner until reaching the sub-node group where the root node is located;
wherein the information propagation frequency between the child nodes is different from the information propagation frequency between the root node and the communication equipment; and information transmission between the sub-nodes adopts a 5.8GHz channel, and information transmission between the root node and the communication equipment adopts a 2.4GHz channel.
Compared with the prior art, the anti-interference tunnel real-time communication method and system based on the MESH technology provided by the embodiment of the application have the following beneficial effects:
in the embodiment of the application, when links are associated, the nearest sub-node group from the communication equipment B selects the sub-node with the largest number in the node group as a root node, and the root node receives the broadcast sent by all the sub-nodes of the node group and compares the broadcast information and sends the broadcast information to the communication equipment B; the error rate of information transmission is greatly reduced through the comparison of the root node to the information. Meanwhile, when information is transmitted, the associated links transmit information through the sub-node groups, and each sub-node in the sub-node groups transmits the information to the sub-node of the corresponding number of the next sub-node group in a directional manner until reaching the sub-node group where the root node is located; the mesh network is introduced and divided into a plurality of sub-node groups, and the purpose of realizing rapid and lossless information propagation in a long tunnel can be achieved in a mode that the sub-node groups are directionally propagated to the next sub-node group. And the information propagation frequency between the child nodes is different from the information propagation frequency between the root node and the communication equipment, namely, the return and access of signals are mutually independent through the multi-frequency networking, so that the method has stronger independence and anti-interference capability.
Drawings
FIG. 1 is a schematic diagram of an anti-interference tunnel real-time communication structure based on MESH technology according to an embodiment;
fig. 2 is a flowchart of an anti-interference tunnel real-time communication method based on the MESH technology according to an embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Currently, a general communication method for link association between two communication devices includes: the communication equipment A broadcasts a link request packet, the communication equipment B confirms the interface state of the communication equipment A after receiving the broadcast link request packet and replies a link response packet, the communication equipment A confirms the interface state of the communication equipment B after receiving the link response packet, and sends a link confirmation packet, and the interface states of the communication equipment A and the communication equipment B are updated and associated with each other.
Referring to fig. 1-2, an anti-interference tunnel real-time communication method based on the MESH technology provided by the embodiment of the application specifically includes:
1) The nodes are linearly arranged in the tunnel, and all the nodes are numbered according to the sequence; and if detecting that the newly added or damaged nodes exist in the network, recoding all the nodes.
2) The numbered nodes are grouped, and every four nodes are grouped from the first node to form a node group.
3) The associated links propagate information through the cluster of children, and each child in the cluster of nodes sends out a broadcast to the child corresponding to the next cluster of nodes until the cluster of nodes where the root node is located (propagation between children) is reached. The node group where the root node in the link is located sends information to the root node, the root node compares the information and then sends the information to the communication equipment, and the error rate of information transmission is greatly reduced through the comparison of the root node to the information, so that the purpose of lossless transmission is realized.
4) When the links are associated, the sub-node group near the communication equipment B selects the sub-node with the largest number in the node group as the root node, and the root node receives the broadcast sent by all the sub-nodes of the node group and compares the information and sends the information to the communication equipment B (the determination and the action of the root node). Specifically, the communication module of the root node extracts data with the same corresponding bit and the largest data duty ratio in the broadcast information codes sent by all the child nodes, combines the extracted bit data to form a new broadcast information code, and sends the new broadcast information code to the communication equipment B, so that real-time error correction aiming at link noise, crosstalk or transmission caused error code is realized at a software level, and the reliability of link transmission is improved.
5) After sending the request of link association, if no reply is received within 10 ms, the link association fails, and the communication device a does not update the interface state. After successful link association, it is checked whether the link is broken or updated every 3 seconds.
6) After receiving the link request packet, the communication device B changes the interface state, and no other request packets are received.
7) After receiving the link request packet, the communication device B transmits a link response packet to a corresponding node group transmitting the link request packet, and after receiving a root node enabling signal of the link response packet, the node state of the node group with the largest number is changed into a root node, and the root node enabling signal, the root node number and the propagation direction are updated.
8) After receiving the link response packet, the communication device a changes the interface state, and no other request packets are received. Transmitting a link acknowledgement packet to a corresponding node group transmitting a link response packet, and after the node group receives a root node enabling signal of the link acknowledgement packet, changing the node state of the node group with the largest number into a root node, and updating the root node enabling signal, the root node number and the propagation direction.
9) After receiving the link confirmation packet, the communication equipment B updates the interface state, establishes the link, and determines two root nodes in the link.
The above sequence number is not limited to the order of execution of the methods.
For the above 3) and 4), the node in the embodiment of the present application has two functions of relay and forwarding, and the relay nodes adopt a 5.8GHz transmission mode to take charge of the transmission of the whole communication link; the forwarding node (i.e. the selected root node) adopts a mode of combining 2.4GHz and 5.8GHz, the front end is connected with the handheld communication equipment, and the rear end is accessed to the MESH network. In addition, the information transmission between the sub-nodes adopts a 5.8GHz channel, and the information transmission between the root node and the communication equipment adopts a 2.4GHz channel. The multi-frequency networking enables the back transmission and the access of signals to be mutually independent, has stronger independence and anti-interference capability, and the use of the 5G network improves the speed of information transmission.
For 4) above, the following qualitative propagation method is provided in the examples of the present application:
41 When the communication device broadcasts the link request packet to the nearest node group, the node group identifies the node type as the communication device, the propagation direction information in the link request packet is not modified, and the node groups corresponding to the two sides of the node group can all receive the link request packet.
42 After the node group identification node type at two sides is the MESH node, detecting that the propagation direction information in the link request packet is not initialized, comparing the number of the node group with the number of the last node group, and modifying the propagation direction information in the link request packet.
43 The following node group will preferentially detect whether the propagation direction is consistent with the change of the node number size, and if so, the information is received and broadcast. After the propagation direction is determined, the information broadcast by each node can only be received by the nodes consistent with the propagation direction, so that unidirectional propagation of the information is realized. (if the propagation direction is negative after the broadcast is sent out by the node numbered 16, the information can only be received by the node numbered 12).
In the embodiment of the application, the link request packet comprises the current equipment interface information, the current node type, the current node number and the propagation direction; the link response packet comprises current equipment interface information, a root node enabling signal, a root node number, a current node number and a propagation direction; the link confirmation packet includes current device interface information, a root node enable signal, a root node number, a current node number, and a propagation direction.
Based on the same inventive concept, referring to fig. 1-2, the embodiment of the application further provides an anti-interference tunnel real-time communication system based on the MESH technology, which specifically comprises:
basic link association module: the communication equipment A broadcasts a link request packet, the communication equipment B confirms the interface state of the communication equipment A after receiving the broadcast link request packet and replies a link response packet, the communication equipment A confirms the interface state of the communication equipment B after receiving the link response packet, and sends a link confirmation packet, and the interface states of the communication equipment A and the communication equipment B are updated and associated with each other.
The numbering module is used for uniformly numbering all the MESH nodes arranged in the tunnel, grouping all the MESH nodes according to the numbering sequence, taking the MESH nodes divided into a group as a sub-node group, and numbering all the sub-node groups.
And the link association module is used for selecting the child node with the largest number in the node group as a root node from the nearest child node group of the communication equipment B during link association, and the root node receives the broadcast sent by all the child nodes of the node group and compares the broadcast information and sends the broadcast information to the communication equipment B.
And the communication module is used for transmitting information through the sub-node groups by the associated links when information is transmitted, and each sub-node in the sub-node groups transmits the information to the sub-node of the corresponding number of the next sub-node group in a directional manner until the sub-node group where the root node is located is reached.
Wherein, the information propagation frequency between the child nodes is different from the information propagation frequency between the root node and the communication equipment; information transmission between the sub-nodes adopts a 5.8GHz channel, and information transmission between the root node and the communication equipment adopts a 2.4GHz channel.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (9)
1. An anti-interference tunnel real-time communication method based on MESH technology comprises the following steps:
the communication equipment A broadcasts a link request packet, the communication equipment B confirms the interface state of the communication equipment A after receiving the broadcast link request packet and replies a link response packet, the communication equipment A confirms the interface state of the communication equipment B after receiving the link response packet, and sends a link confirmation packet, and the interface states of the communication equipment A and the communication equipment B are updated and associated with each other; it is characterized in that the method comprises the steps of,
the method further comprises the steps of:
uniformly numbering all MESH nodes arranged in a tunnel, grouping all the MESH nodes according to the numbering sequence, taking the MESH nodes divided into a group as a sub-node group, and numbering all the sub-node groups;
when the links are associated, the nearest sub-node group from the communication equipment B selects the sub-node with the largest number in the node group as a root node, and the root node receives the broadcast sent by all the sub-nodes of the node group and compares the broadcast information and sends the broadcast information to the communication equipment B;
when information is transmitted, the associated links transmit information through the sub-node groups, and each sub-node in the sub-node groups transmits the information to the sub-node of the corresponding number of the next sub-node group in a directional manner until reaching the sub-node group where the root node is located;
the information propagation frequency between the child nodes is different from the information propagation frequency between the root node and the communication equipment; the information transmission between the sub-nodes adopts a 5.8GHz channel, and the information transmission between the root node and the communication equipment adopts a 2.4GHz channel;
each sub-node in the sub-node group directionally propagates information to the sub-node of the corresponding number of the next sub-node group, and specifically comprises the following steps:
when the communication equipment broadcasts the link request packet to the nearest sub-node group, the sub-node group identifies the node type as the communication equipment, the propagation direction information in the link request packet is not modified, and the sub-node groups corresponding to the two sides of the sub-node group can both receive the link request packet;
after the child node groups on two sides identify that the node type is a MESH node, detecting that the propagation direction information in the link request packet is not initialized, comparing the number of the child node group with the number of the last node group, and modifying the propagation direction information in the link request packet;
the latter sub-node group preferentially detects whether the propagation direction is consistent with the variation of the number of the sub-node, and if so, the information is received and broadcast.
2. The method for real-time communication of anti-interference tunnel based on MESH technology as claimed in claim 1, wherein said uniformly numbering all MESH nodes arranged in the tunnel, grouping all MESH nodes according to the numbering sequence, specifically comprises:
numbering all MESH nodes which are linearly arranged in the tunnel according to the front-back sequence;
for the numbered MESH nodes, starting from the first MESH node, every four MESH nodes are grouped.
3. The method for anti-interference tunnel real-time communication based on the MESH technology as claimed in claim 1, further comprising:
and if detecting that a new or damaged MESH node exists in the MESH network, recoding and grouping all the MESH nodes.
4. The method for anti-interference tunnel real-time communication based on the MESH technology as claimed in claim 1, further comprising:
after the request of link association is sent, if no reply is received within 10 milliseconds, the link association fails, and the communication equipment A does not update the interface state; otherwise, the link is successfully associated, and whether the link is disconnected or updated is detected every 3 seconds.
5. The method for real-time communication of anti-interference tunnel based on MESH technology as claimed in claim 1, wherein said root node receives the broadcast from all child nodes of the node group and compares the broadcast information and sends it to the communication device B, specifically comprising:
the communication module of the root node extracts the data with the same corresponding bit and the maximum data duty ratio in the broadcast information codes sent by all the child nodes, combines the extracted bit data to form a new broadcast information code, and sends the new broadcast information code to the communication equipment B.
6. The method for anti-interference tunnel real-time communication based on the MESH technology as claimed in claim 1, further comprising:
after receiving the link request packet, the communication equipment B changes the interface state and does not receive other request packets;
and after receiving the link request packet, the communication equipment B transmits a link response packet to a corresponding sub-node group transmitting the link request packet, and after receiving a root node enabling signal of the link response packet, the sub-node state of the sub-node group with the largest number is changed into a root node, and the root node enabling signal, the root node number and the propagation direction are updated.
7. The method for anti-interference tunnel real-time communication based on the MESH technology as claimed in claim 1, further comprising:
after receiving the link response packet, the communication equipment A changes the interface state and does not receive other request packets;
after receiving the link response packet, the communication equipment A transmits a link acknowledgement packet to a corresponding sub-node group transmitting the link response packet, and after receiving a root node enabling signal of the link acknowledgement packet, the sub-node state with the largest number of the sub-node group is changed into a root node, and the root node enabling signal, the root node number and the propagation direction are updated.
8. The method for anti-interference tunnel real-time communication based on the MESH technology as claimed in claim 1, further comprising:
after receiving the link confirmation packet, the communication equipment B updates the interface state, establishes the link, and determines two root nodes in the link.
9. An anti-interference tunnel real-time communication system based on the MESH technology, comprising:
basic link association module: the communication equipment A broadcasts a link request packet, the communication equipment B confirms the interface state of the communication equipment A after receiving the broadcast link request packet and replies a link response packet, the communication equipment A confirms the interface state of the communication equipment B after receiving the link response packet, and sends a link confirmation packet, and the interface states of the communication equipment A and the communication equipment B are updated and associated with each other; it is characterized in that the method comprises the steps of,
the system further comprises:
the numbering module is used for uniformly numbering all the MESH nodes arranged in the tunnel, grouping all the MESH nodes according to the numbering sequence, taking the MESH nodes divided into a group as a sub-node group, and numbering all the sub-node groups;
the link association module is used for selecting the child node with the largest number in the node group as a root node from the nearest child node group of the communication equipment B when the links are associated, and the root node receives the broadcast sent by all the child nodes of the node group and compares the broadcast information and sends the broadcast information to the communication equipment B;
the communication module is used for transmitting information through the sub-node groups by the associated links when information is transmitted, and each sub-node in the sub-node groups transmits the information to the sub-node of the corresponding number of the next sub-node group in a directional manner until reaching the sub-node group where the root node is located;
the information propagation frequency between the child nodes is different from the information propagation frequency between the root node and the communication equipment; the information transmission between the sub-nodes adopts a 5.8GHz channel, and the information transmission between the root node and the communication equipment adopts a 2.4GHz channel;
the communication module is specifically configured to:
when the communication equipment broadcasts the link request packet to the nearest sub-node group, the sub-node group identifies the node type as the communication equipment, the propagation direction information in the link request packet is not modified, and the sub-node groups corresponding to the two sides of the sub-node group can both receive the link request packet;
after the child node groups on two sides identify that the node type is a MESH node, detecting that the propagation direction information in the link request packet is not initialized, comparing the number of the child node group with the number of the last node group, and modifying the propagation direction information in the link request packet;
the latter sub-node group preferentially detects whether the propagation direction is consistent with the variation of the number of the sub-node, and if so, the information is received and broadcast.
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