CN110234154B - Outdoor team communication system supporting ad hoc network - Google Patents
Outdoor team communication system supporting ad hoc network Download PDFInfo
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- CN110234154B CN110234154B CN201910522550.2A CN201910522550A CN110234154B CN 110234154 B CN110234154 B CN 110234154B CN 201910522550 A CN201910522550 A CN 201910522550A CN 110234154 B CN110234154 B CN 110234154B
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/12—Discovery or management of network topologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- 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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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Abstract
The invention discloses an outdoor team communication system supporting ad hoc networks, which comprises a plurality of communication nodes, wherein the communication nodes are in a mesh topology structure, and each communication node is in two-way communication with adjacent communication nodes. The invention realizes team outdoor communication by communication between communication nodes through communication node ad hoc network, overcomes the defect that the traditional team outdoor communication depends on a global positioning system and a mobile communication network, and overcomes the defects of limited communication networking range and communication distance of the traditional outdoor team communication by utilizing a mesh topology structure and two-way communication formed by the communication nodes.
Description
Technical Field
The invention relates to the field of local area network communication, in particular to an outdoor team communication system supporting ad hoc networks.
Background
With the increasing of the outgoing demands of people, the demands of people on outdoor outgoing equipment are rapidly increased no matter in the form of tourist groups or by self-help tourism of groups or outdoor exploration of groups. Most outdoor travel equipment on the market at present are tour guide equipment for outdoor tourism, and the outdoor travel equipment basically depends on a global positioning navigation system, a mobile communication network, a built-in map and the like for tour guide and navigation, and is large in size and high in cost. As disclosed in publication No.: the tour guide device of CN206040183U not only uses traditional microprocessor, mobile network communication and global positioning system, but also adds ZigBee wireless communication module for communication between devices, and also has emergency help function. However, the tour guide equipment is highly dependent on a global positioning system and a mobile communication network, signals of remote places in the open air are poor, the signals are easy to lose, and the reliability is general. In addition, the network connection mode of the host and the slave adopts a star network structure, the networking range is limited, the expansion is difficult, and the communication distance is limited.
Disclosure of Invention
The invention provides an outdoor team communication system supporting ad hoc network, aiming at overcoming the defects that the team outdoor communication depends on a global positioning system and a mobile communication network and the networking range and the communication distance are limited in the prior art.
The technical scheme of the invention is as follows:
an outdoor team communication system supporting ad hoc network comprises a plurality of communication nodes, wherein the communication nodes are of a mesh topology structure, each communication node is in two-way communication with adjacent communication nodes, the communication address of each communication node in the communication system is unique, when a new communication node is added to a network where the communication system is located, the new communication node sends a network access request to the communication node closest to the new communication node, the closest communication node distributes a network address to the new communication node and broadcasts and sends network access information of the new communication node to all the communication nodes in the communication system, all the communication nodes in the communication system send the address of the communication node to the new communication node after receiving the network access information of the new communication node, and the new communication node establishes a network address table of all the communication nodes in the network, broadcasting and sending successful network access information;
and after other communication nodes receive the network access information, comparing the network address of the newly added communication node with the existing network address table, if the network address of the newly added communication node does not exist, adding the network address of the newly added communication node into the network address table of the communication node, and if the network address of the newly added communication node does not exist, adding the network address of the newly added communication node into the network address table.
In the scheme, the maximum communication distance between two adjacent communication nodes is a preset fixed value.
In the scheme, the network addresses are sorted according to the signal strength of the received message of each communication node, each communication node only forwards and stores the received broadcast message once, and the message is not forwarded when the same broadcast message is received again.
In this scheme, each communication node is a communication device, the device includes: the system comprises a singlechip module, a signal positioning module, a function key module, a network communication module, a loudspeaker module, a display module and a power supply module;
network communication module, signal positioning module all with single chip module communication connection, the output of function button with single chip module's input is connected, the input of module of raising one's voice, display module's input all are connected with single chip module's output, power module does single chip module, signal positioning module, function button module, network communication module, the module of raising one's voice, display module power supply.
In the scheme, the network communication module receives information sent by other communication devices in the communication system and then sends the information to the single chip microcomputer module for processing, and the single chip microcomputer module correspondingly sends the information to the loudspeaker module or the display module according to the information type of the information; if the information is positioning request information, the single chip microcomputer module sends the information to the signal positioning module for processing, the information is forwarded to the single chip microcomputer module after the processing is finished, the information processed by the signal positioning module is sent to the display module by the single chip microcomputer module, and the distance and the direction of nearby communication are displayed on the display module;
the function key module is used for generating instruction information through direct operation of a user, the instruction information is transmitted to the single chip microcomputer module, the single chip microcomputer module processes the instruction information according to the type of the instruction information and then transmits the instruction information to the network communication module, and the network communication module transmits the information processed by the single chip microcomputer module to other communication devices except the communication device in the communication system;
the instruction message generated by the functional keys comprises a team personnel checking instruction, a team gathering instruction and an emergency help seeking instruction;
the loudspeaking module is used for notification of team management messages, the team management messages including: the method comprises the following steps of (1) carrying out dequeue reminding, checking team personnel and gathering teams;
the network communication module is used for communication and networking among the communication devices;
the display module is used for displaying the electric quantity of the power supply module, the quantity of other communication devices around the communication device and corresponding distances and directions;
the signal positioning module comprises a magnetic sensor and a direction sensor and is used for calculating the distance and the direction of the communication device around the current communication device.
In the scheme, the dequeue reminding is that a signal is lost when the communication device is disconnected from a network where the communication system is located, the current communication device is judged not to be in the network range where the communication system is located through the detection of the time for receiving messages at regular time, other communication devices in the communication system send the dequeue reminding through the loudspeaker module, the current communication device disconnected from the network where the communication system is located detects that the communication device is in an off-network state and sends the dequeue reminding, and when only one communication device is connected with any communication device in the communication system, the dequeue reminding is generated if the network connection is interrupted.
In this scheme, team personnel check through function button module and speaker module realize, when a certain user sends team personnel check signal to team member, team personnel check signal transmission to communication system's each communication device, each team member is reminded to each team member to count by each communication device's speaker module, each team member sends signal response to the user of reminding the sending through function button module, remind the user that sends to accomplish signal statistics on communication device, realize team personnel check function, ensure team's completeness, prevent that team member from wandering away and breaking away from.
In the scheme, the team set instruction is completed through the functional key module and the loud speaker module, when a user sends the team set instruction through a key, each communication device of the communication system sends a set prompt and a team member sets through the loud speaker module and the display module after receiving the team set instruction information.
In the scheme, the emergency help-seeking instruction is that a user sends an emergency help-seeking signal to surrounding communication devices through the function key module, and the communication devices which receive the emergency help-seeking signal in the communication system all send the emergency help-seeking signal through the loudspeaker module, so that a team is motivated to search and rescue rapidly in time.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention realizes team outdoor communication by communication between communication nodes through communication node ad hoc network, overcomes the defect that the traditional team outdoor communication depends on a global positioning system and a mobile communication network, and overcomes the defects of limited communication networking range and communication distance of the traditional outdoor team communication by utilizing a mesh topology structure and two-way communication formed by the communication nodes.
Drawings
Fig. 1 is a schematic diagram of network connection of the communication system of the present invention.
Fig. 2 is a schematic diagram of network communication distance augmentation.
Fig. 3 is a schematic diagram of a communication device.
FIG. 4 is a schematic view of the positioning display.
Fig. 5 is a flowchart of a specific algorithm for unknown node location.
Fig. 6 is a diagram of multi-channel communication.
FIG. 7 is a diagram of a dequeue reminder.
FIG. 8 is a flow chart of the dequeue reminder process.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, an outdoor team communication system supporting ad hoc networking comprises a plurality of communication nodes, the plurality of communication nodes are in a mesh topology structure, each communication node is in bidirectional communication with an adjacent communication node, the communication address of each communication node in the communication system is unique, when a network where the communication system is located is added with a new communication node, the new communication node sends a network access request to the communication node nearest to the new communication node, the nearest communication node allocates a network address to the new communication node and broadcasts and sends network access information of the new communication node to all the communication nodes in the communication system, all the communication nodes in the communication system send their addresses to the new communication node after receiving the network access information of the new communication node, the new communication node establishes a network address table of all the communication nodes in the network, broadcasting and sending successful network access information;
and after other communication nodes receive the network access information, comparing the network address of the newly added communication node with the existing network address table, if the network address of the newly added communication node does not exist, adding the network address of the newly added communication node into the network address table of the communication node, and if the network address of the newly added communication node does not exist, adding the network address of the newly added communication node into the network address table. It should be noted that when any communication node in the communication system is disconnected and then is connected again, at this time, because the network address of the communication node is added into the network address table when the current node is accessed into the communication system for the first time, the network address table retains the address of the communication node and cannot be added any more.
In the scheme, the maximum communication distance between two adjacent communication nodes is a preset fixed value. In this embodiment, the maximum communication distance between two adjacent communication nodes is 100 meters.
It should be noted that the communication system constructed by the present invention is a peer-to-peer network, does not need a central node,
fig. 2 is a schematic diagram of network communication distance expansion, and it should be noted that node 1, node 2, node 3, and node 4 correspond to communication device 1, communication device 2, communication device 3, and communication device 4, respectively; the maximum communication distance between the node 1 and the node 2 is 100m, and when the node 3 and the node 4 are newly added to access the node 2, the information of the node 1 can be retransmitted to the node 3 through the node 2 and retransmitted to the node 4 through the node 3 due to the adoption of a bidirectional communication mode. The maximum communication distance of the communication system is expanded from the original single-hop of 100m of double nodes to three-hop of 400m of four nodes. By adding nodes continuously, the scale and communication distance of the network can be continuously enlarged, and each node in the network can receive the same message. When the nodes form a network with a network structure, if one channel is blocked or interrupted, the transmission can be continued by other channels.
In the embodiment, the ZigBee technology is used, so that the networking of the nodes and the networking process of the unknown nodes can be automatically realized by utilizing the self-carried characteristics of the ZigBee.
In the scheme, the network addresses are sorted according to the signal strength of the received message of each communication node, each communication node only forwards and stores the received broadcast message once, and the message is not forwarded when the same broadcast message is received again.
Fig. 3 is a schematic diagram of the communication device structure. In this scheme, each communication node is a communication device, the communication device includes: the system comprises a singlechip module, a signal positioning module, a function key module, a network communication module, a loudspeaker module, a display module and a power supply module;
network communication module, signal positioning module all with single chip module communication connection, the output of function button with single chip module's input is connected, the input of module of raising one's voice, display module's input all are connected with single chip module's output, power module does single chip module, signal positioning module, function button module, network communication module, the module of raising one's voice, display module power supply. And the power module adopts a fifth dry battery or a rechargeable battery.
In the scheme, the network communication module receives information sent by other communication devices in the communication system and then sends the information to the single chip microcomputer module for processing, and the single chip microcomputer module correspondingly sends the information to the loudspeaker module or the display module according to the information type of the information; if the information is positioning request information, the single chip microcomputer module sends the information to the signal positioning module for processing, the information is forwarded to the single chip microcomputer module after the processing is finished, the information processed by the signal positioning module is sent to the display module by the single chip microcomputer module, and the distance and the direction of nearby communication are displayed on the display module;
the function key module is used for generating instruction information through direct operation of a user, the instruction information is transmitted to the single chip microcomputer module, the single chip microcomputer module processes the instruction information according to the type of the instruction information and then transmits the instruction information to the network communication module, and the network communication module transmits the information processed by the single chip microcomputer module to other communication devices except the communication device in the communication system;
the instruction message generated by the functional keys comprises a team personnel checking instruction, a team gathering instruction and an emergency help seeking instruction;
the loudspeaking module is used for notification of team management messages, the team management messages including: the method comprises the following steps of (1) carrying out dequeue reminding, checking team personnel and gathering teams;
the network communication module is used for communication and networking among the communication devices;
the display module is used for displaying the electric quantity of the power supply module, the quantity of other communication devices around the communication device and corresponding distances and directions;
the signal positioning module comprises a magnetic sensor and a direction sensor and is used for calculating the distance and the direction of the communication device around the current communication device;
in this embodiment, the positioning function of the communication device utilizes the magnetic sensor to convert the signal strength between the communication devices into a distance, the direction sensor identifies the direction, and the distance and the direction of the communication devices around the current communication device are displayed on the display module.
As shown in fig. 4, the positioning display diagram is a current location of the user in the middle, and the other three points are the directions and distances of the three communication devices scanned around. The positioning distance between the communication devices is within one hundred meters, the voice of people can be easily transmitted to the position at the distance, the other party can be conveniently found, and the positioning function can sufficiently meet the use condition under the condition of outdoor travel.
It should be noted that the present invention uses the rssi (received Signal Strength indication) algorithm to convert the Signal Strength into the distance.
After the distances from the three surrounding communication devices to the central point (i.e. the current communication device) are obtained, the existing trilateration algorithm is used for relative positioning.
A plurality of groups of positioning units can be arranged in the relative positioning, three nearest beacon nodes form one positioning unit, the single-hop unknown nodes at the nearby positions are positioned, and the information of the positioning units is integrated to obtain the topological structure of the whole communication system. And the direction sensor arranged on the communication device (node) can display the distance and direction information of all nodes in the nearby communication range. In order to improve the positioning accuracy, the unknown node can be set to continuously transmit positioning information for ten times in a short time, and the distance calculation is carried out after the average value of the RSSI is obtained. The specific algorithm flow of the unknown node location is shown in fig. 5.
In the scheme, the dequeue reminding is that a signal is lost when the communication device is disconnected from a network where the communication system is located, the current communication device is judged not to be in the network range where the communication system is located through the detection of the time for receiving messages at regular time, other communication devices in the communication system send the dequeue reminding through the loudspeaker module, the current communication device disconnected from the network where the communication system is located detects that the communication device is in an off-network state and sends the dequeue reminding, and when only one communication device is connected with any communication device in the communication system, the dequeue reminding is generated if the network connection is interrupted.
As shown in fig. 6, if the communication device 1 is disconnected from the communication device 2 due to a channel problem, the message broadcasting function can maintain communication with the communication device 2 through other nodes (e.g., through the communication device 4) to ensure reliable communication, and at this time, no dequeue reminding signal is sent.
As shown in fig. 7, if the communication device 7 loses contact with the communication device 3, the communication device in the network sends out the dequeue alert because the communication device cannot access the network through other nodes.
The dequeue reminder processing flow is shown in fig. 8.
In this scheme, team personnel check through function button module and speaker module realize, when a certain user sends team personnel check signal to team member, team personnel check signal transmission to communication system's each communication device, each team member is reminded to each team member to count by each communication device's speaker module, each team member sends signal response to the user of reminding the sending through function button module, remind the user that sends to accomplish signal statistics on communication device, realize team personnel check function, ensure team's completeness, prevent that team member from wandering away and breaking away from.
In the scheme, the team set instruction is completed through the functional key module and the loud speaker module, when a user sends the team set instruction through a key, each communication device of the communication system sends a set prompt and a team member sets through the loud speaker module and the display module after receiving the team set instruction information.
In the scheme, the emergency help-seeking instruction is that a user sends an emergency help-seeking signal to surrounding communication devices through the function key module, and the communication devices which receive the emergency help-seeking signal in the communication system all send the emergency help-seeking signal through the loudspeaker module, so that a team is motivated to search and rescue rapidly in time.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. An outdoor team communication system supporting ad hoc network is characterized in that the communication system comprises a plurality of communication nodes,
the communication nodes are of a mesh topology structure, each communication node is in two-way communication with an adjacent communication node, the communication address of each communication node in the communication system is unique, when a new communication node is added to a network where the communication system is located, the newly-added communication node sends a network access request to the communication node closest to the newly-added communication node, the closest communication node distributes a network address to the new communication node and broadcasts and sends network access information of the newly-added communication node to all the communication nodes in the communication system, all the communication nodes in the communication system send the addresses of the newly-added communication node to the newly-added communication node after receiving the network access information of the newly-added communication node, the newly-added communication node establishes a network address table of all the communication nodes in the communication system, and broadcasts and sends the network access information successfully;
after other communication nodes receive the network access information, comparing the network address of the newly added communication node with the existing network address table, if the network address of the newly added communication node does not exist, adding the network address of the newly added communication node into the network address table of the other communication node, and if the network address of the newly added communication node does not exist, adding the network address of the newly added communication node into the network address table;
the maximum communication distance between two adjacent communication nodes is a preset fixed value;
the network address sorting mode is that sorting is carried out according to the signal intensity of the received message of each communication node, each communication node only forwards and stores the received broadcast message once, and the message is not forwarded when the same broadcast message is received again;
each communication node is a communication device, the device comprising: the system comprises a singlechip module, a signal positioning module, a function key module, a network communication module, a loudspeaker module, a display module and a power supply module;
network communication module, signal positioning module all with single chip module communication connection, the output of function button with single chip module's input is connected, the input of module of raising one's voice, display module's input all are connected with single chip module's output, power module does single chip module, signal positioning module, function button module, network communication module, the module of raising one's voice, display module power supply.
2. The outdoor team communication system supporting the ad hoc network according to claim 1, wherein the network communication module receives information sent by other communication devices in the communication system and then sends the information to the single chip microcomputer module for processing, and the single chip microcomputer module correspondingly sends the information to the speaker module or the display module according to the information type of the information; if the information is positioning request information, the single chip microcomputer module sends the information to the signal positioning module for processing, the information is forwarded to the single chip microcomputer module after the processing is finished, and the information processed by the signal positioning module is sent to the display module by the single chip microcomputer module;
the function key module is used for generating instruction information through direct operation of a user, the instruction information is transmitted to the single chip microcomputer module, the single chip microcomputer module processes the instruction information according to the type of the instruction information and then transmits the instruction information to the network communication module, and the network communication module transmits the information processed by the single chip microcomputer module to other communication devices except the communication device in the communication system;
the instruction message generated by the functional keys comprises a team personnel checking instruction, a team gathering instruction and an emergency help seeking instruction;
the loudspeaking module is used for notification of team management messages, the team management messages including: the method comprises the following steps of (1) carrying out dequeue reminding, checking team personnel and gathering teams;
the network communication module is used for communication and networking among the communication devices;
the display module is used for displaying the electric quantity of the power supply module, the quantity of other communication devices around the communication device and corresponding distances and directions;
the signal positioning module comprises a magnetic sensor and a direction sensor and is used for calculating the distance and the direction of the communication device around the current communication device.
3. The outdoor team communication system supporting ad hoc networks according to claim 2, wherein the out-of-team reminder is that a signal loss occurs when a communication device is out of a network where the communication system is located, and the timing message receiving time detection judges that the current communication device is not within the range of the network where the communication system is located, other communication devices in the communication system all send out the out-of-team reminder through a speaker module, the current communication device out of the network where the communication system is located detects an off-network state of itself and sends out the out-of-team reminder, and when only one communication device is connected to any one communication device in the communication system, the out-of-team reminder is generated if the network connection is interrupted.
4. The outdoor team communication system supporting the ad hoc network as claimed in claim 2, wherein the team personnel count is realized by the function key module and the loud speaker module, when a certain user sends a team personnel count signal to a team member, the team personnel count signal is transmitted to each communication device of the communication system, the loud speaker module of each communication device reminds each team member to count, each team member sends a signal response to the user who reminds to send through the function key module, the user who reminds to send completes signal statistics on the communication device, and the team personnel count function is realized.
5. The outdoor team communication system supporting ad hoc networks according to claim 2, wherein the team set command is completed through the function button module and the speaker module, and when the user sends the team set command through a button, each communication device of the communication system receives the team set command information and then sends a set prompt through the speaker module and the display module, so that the team members are set.
6. The outdoor team communication system supporting ad hoc networks according to claim 2, wherein the emergency help-seeking instruction is that a user sends an emergency help-seeking signal to surrounding communication devices through a function key module, and all communication devices in the communication system which receive the emergency help-seeking signal send the emergency help-seeking signal through a speaker module, so that teams are motivated to search and rescue quickly in time.
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| CN110868345B (en) * | 2019-11-06 | 2022-01-04 | Oppo广东移动通信有限公司 | Information sharing method and related product |
| CN112770274A (en) * | 2021-01-18 | 2021-05-07 | 阿里巴巴集团控股有限公司 | Data processing method and software product |
| CN113301511B (en) * | 2021-07-26 | 2021-11-05 | 广州慧睿思通科技股份有限公司 | Node joining method, interphone, system and storage medium |
| CN114501309A (en) * | 2022-01-11 | 2022-05-13 | 武汉轻工大学 | Tour guide explaining device with positioning function |
| CN116189381A (en) * | 2023-03-07 | 2023-05-30 | 光控特斯联(上海)信息科技有限公司 | Team travel safety protection device and method |
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