Incremental position information sending system of narrowband multi-hop ad hoc network

Abstract

The invention discloses a narrowband multi-hop ad hoc network incremental position information sending system, which comprises a plurality of terminals and a field device, the distance between two adjacent terminals is less than or equal to the radiation radius of the terminals, by adopting the arrangement mode, the plurality of terminals form an ad hoc network, the field device is a power acquisition terminal, and the field device is a wireless communication terminal. According to the system, remote signaling data, telemetering data and remote control data are collected, data of field devices in the area range in the operation process are transmitted through the ad-hoc network, the ad-hoc network comprises an initial networking part and a periodic networking part, and incremental position information serves as a data transmission channel of the system. Compared with direct transmission, the location routing transmission time is greatly shortened, service collision is reduced, the connectivity rate of the ad hoc network is guaranteed to the maximum extent, and a precious green life channel is provided when the ad hoc network is used in an emergency environment.

Description

Technical Field

[0001] The present invention relates to the technical field of narrowband emergency communication, and in particular to a narrowband multi-hop ad hoc network incremental position information sending system. Background Art

[0002] With the continuous development of science and technology, wireless communication technology is being used more and more widely in various fields. In specific industries such as rescue, security monitoring, and power, the requirements for wireless communication technology are more stringent. In these scenarios, factors such as signal stability, coverage, anti-interference ability, and networking speed are crucial. Narrowband wireless ad hoc networking technology has emerged as an important solution for communication security in these industries.

[0003] Narrowband wireless ad hoc networking technology is a highly efficient wireless communication technology with the following characteristics:

[0004] 1. Efficient networking: Narrowband wireless ad hoc networking technology adopts a distributed networking method, which can achieve rapid networking, allowing the command center to quickly obtain on-site information and buy time for rescue work.

[0005] 2. Strong anti-destruction capability: Narrowband wireless ad hoc network technology has the characteristics of strong anti-destruction capability and can ensure smooth communication in extreme environments. For example, communication capabilities are still guaranteed in disasters such as earthquakes, floods, and typhoons.

[0006] 3. Wide coverage: Narrowband wireless ad hoc networking technology uses radio frequency extension technology to achieve ultra-long distance communication and a wide coverage range, which can meet the communication needs of different scenarios.

[0007] 4. Stable and reliable operation: Narrowband wireless ad hoc network technology adopts a variety of fault-tolerant mechanisms to ensure stable and reliable system operation and smooth communication in complex environments.

[0008] 5. Standard adaptation, can match EPDT / PDT / DMR and other standard terminals: Narrowband wireless ad hoc network technology adopts air interface compatible adaptive technology, and standard EPDT / PDT / DMR and other standard terminals can be connected to the network for use.

[0009] 6. Base station communication: The ad hoc network relay terminal in the narrowband wireless ad hoc network technology can be integrated with the base station communication.

[0010] Based on the above characteristics of narrowband communication, narrowband communication networks are mostly used in the power industry. In the existing narrowband wireless self-organizing network solutions, in the terminal direct mode, only multiple terminals are needed to realize self-organizing network, self-recovery, multi-hop forwarding, emergency request forwarding and other business functions, without the need for base station and relay station equipment.

[0011] At present, the specific steps for implementing the service are given in the public information of narrowband ad hoc networks, but the location information of each node needs to be transmitted (carrying the route), and the transmission is carried out in the form of short messages, which requires three frames of data (one header frame + two data blocks). At 60ms per frame, it takes 180ms, and according to the four-turn forwarding time, it is 900ms. So when there are many nodes, the networking time will be very long. For example, if there are 10 terminals, the location routing forwarding time will take 9S to complete the networking. With the exit of nodes and the addition of new nodes, the networking information cannot be updated quickly, and the delay is large. It does not meet the needs of fast networking and real-time dynamic adjustment of routing. Summary of the invention

[0012] In order to overcome the above problems, the purpose of the present invention is to provide a narrowband multi-hop self-organizing network incremental position information sending system, which uses incremental position information as a data transmission channel. Compared with direct transmission, it greatly shortens the location routing transmission time, reduces business collisions, and maximizes the connectivity rate of the self-organizing network, providing a valuable green life channel when used in an emergency environment.

[0013] The technical solution adopted by the present invention is:

[0014] A narrowband multi-hop ad hoc network incremental position information transmission system, comprising a terminal and a field device, wherein the terminal is multiple, the distance between two adjacent terminals is less than or equal to the radiation radius of the terminal, and the multiple terminals are arranged in such a way that they form an ad hoc network, the field device is an electric power collection terminal, which collects telesignaling data, telemetering data, and remote control data, and the data of the field devices in the area during operation are transmitted through the ad hoc network;

[0015] The self-organizing network includes two parts: initial networking and periodic networking, wherein S01-S04 is the initial networking stage, and S05-S06 is the periodic networking stage. The data transmission process of the self-organizing network includes the following steps:

[0016] S01: Sending networking broadcast signaling;

[0017] S02: Send complete location information report, including the routing information used;

[0018] S03: The control center obtains the node location information in the ad hoc network and performs the next step of expansion application according to the node location information;

[0019] S04: Entering the idle period, waiting for the next networking cycle;

[0020] S05: When the network is cycled again, only the incremental information of the position is sent;

[0021] S06: After receiving the position increment information, the longitude and latitude increment information and the speed information are transmitted using control signaling according to the time information of the control center time stamp.

[0022] As a further description of the present invention, the radiation radius of the terminal is 15-20 km in a flat area and 6-10 km in an area with buildings or obstructions.

[0023] As a further description of the present invention, the maximum number of field devices that can be deployed within the radiation radius of one terminal is 400-500.

[0024] As a further description of the present invention, the field device further includes an intercom terminal.

[0025] As a further description of the present invention, the cycle period of the periodic networking is set by frequency writing parameters, including networking broadcast signaling time, location reporting time, and idle time.

[0026] As a further description of the present invention, the value of the frequency writing parameter is set according to the degree of rapid change of the network.

[0027] Beneficial effects of the present invention:

[0028] The present invention discloses a narrowband multi-hop ad hoc network incremental position information sending system. The system uses the incremental position information after the ad hoc network is constructed as a data transmission channel. Compared with direct transmission, the position routing transmission time is greatly shortened, the service collision is reduced, the connectivity rate of the ad hoc network is guaranteed to the maximum extent, and a valuable green life channel is provided when used in an emergency environment.

[0029] The invention discloses a narrowband multi-hop ad hoc network incremental position information sending system, which describes specific implementation methods of the initial networking and periodic networking parts of the ad hoc network to ensure reliable and effective implementation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A relative position diagram of nodes in a narrowband multi-hop ad hoc network incremental position information sending system proposed by the present invention;

[0031] Figure 2 This is an initial networking flow chart of a narrowband multi-hop ad hoc network incremental location information sending system proposed by the present invention;

[0032] Figure 3 A periodic networking flow chart of a narrowband multi-hop ad hoc network incremental position information sending system proposed by the present invention;

[0033] Figure 4 This is a data transmission flow chart of a narrowband multi-hop ad hoc network incremental position information sending system proposed by the present invention. DETAILED DESCRIPTION

[0034] The specific implementation of the present invention is described below in conjunction with the accompanying drawings and embodiments:

[0035] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0036] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0037] like Figures 1 to 4 As shown, it shows a specific embodiment of the present invention:

[0038] Embodiment 1

[0039] A narrowband multi-hop ad hoc network incremental position information transmission system, comprising a terminal and a field device, wherein the terminal is multiple, the distance between two adjacent terminals is less than or equal to the radiation radius of the terminal, and the multiple terminals are arranged in such a way that they form an ad hoc network, the field device is an electric power collection terminal, which collects telesignaling data, telemetering data, and remote control data, and the data of the field devices in the area during operation are transmitted through the ad hoc network;

[0040] In this embodiment, Figure 1As shown, the embodiment sets six terminal trunk lines, namely A, B, C, D, E, and F. The positions of the six main terminals can be fixed or dynamically changed, that is, dynamic networking is supported. At the same time, the distance between the terminals is less than the radiation radius of the terminal. In this embodiment, terminals A1 and A2 are arranged around A, terminals B1 and B2 are arranged around B, terminals C1 and C2 are arranged around C, terminals D1 and D2 are arranged around D, terminals E1 and E2 are arranged around E, and terminal F1 is arranged around F. A self-organizing network is formed between the six main terminals. The various hierarchical terminals arranged around the six main terminals can realize data transmission within the self-organizing network area. Especially for the use scenario of the power grid, due to the important role of electricity in production and life, when encountering extreme natural weather that causes the public network base station in the area to be damaged and unable to transmit data, the self-organizing network can be quickly put into use in an emergency state without being restricted by the public network. For economically backward areas, there is a problem of no public network base station construction. The narrowband self-organizing network is used for data transmission, and the transmitted data is more accurate, which can ensure the safe and stable operation of the power grid.

[0041] In this embodiment, the number of terminals is set according to the actual usage scenario. The distance between two adjacent terminals is required to be less than or equal to the radiation radius of the terminals. At the same time, the construction direction between the terminals can be set arbitrarily within the range of the radiation radius. As long as the distance requirements for the above-mentioned terminal layout are met, the data between the terminals arranged around the main terminal can be transmitted, which can be suitable for emergency repair scenarios in reality.

[0042] In this embodiment, the ad hoc network is mainly used for data transmission of power collection terminals. The power collection terminals collect telesignaling data, telemetering data, and remote control data. Because the "three remote data" play an important role in the power system, it is mainly reflected in the following aspects:

[0043] The first point: real-time monitoring and fault diagnosis. The three remote data (telemetry, telesignaling, and remote control) can help the power system monitor the operating status of equipment in real time and promptly discover and resolve faults. For example, electrical parameters such as voltage, current, and power can be monitored through telemetry data, and the switch position and protection action signals of the equipment can be obtained through telesignaling data. The switch status of the equipment can be remotely controlled through remote control data.

[0044] The second point: improving the self-healing capability of the system. In the distribution automation system, the application of the three remote functions significantly enhances the self-healing capability of the power lines. Through telemetry and telesignaling data, the system can automatically detect faults and isolate them, and realize rapid restoration of power supply to non-fault areas through remote control data, thereby greatly shortening the power outage time and improving power supply reliability.

[0045] The third point: Optimizing operation management. The three remote control data can be used to optimize the operation management of the power system. By analyzing the telemetry data, we can understand the load situation of the equipment and reasonably arrange the equipment inspection and maintenance plan; through the telesignaling data, we can timely discover equipment abnormalities and take preventive measures; through the remote control data, remote operation can be achieved to reduce the operation risks of on-site personnel.

[0046] Fourth point: Improve the system automation level. The application of three remote technologies has promoted the automation process of the power system. Through remote monitoring and control, unmanned or less-manned operation of power equipment has been achieved, reducing operation and maintenance costs and improving work efficiency.

[0047] Fifth point: Support the construction of smart grids. In the construction of smart grids, the three remote data are an important basis for realizing the intelligent management of the power grid. By collecting and analyzing the three remote data, a more intelligent and efficient power system can be built to improve the overall operating efficiency and reliability.

[0048] Based on the above characteristics, the accuracy of power data transmission is crucial. The narrowband ad hoc network communication method does not rely on the construction requirements of public base stations, and can establish data transmission channels in a short time to ensure reliable and effective transmission of power grid data.

[0049] The self-organizing network includes two parts: initial networking and periodic networking, wherein S01-S04 is the initial networking stage, and S05-S06 is the periodic networking stage. The data transmission process of the self-organizing network includes the following steps:

[0050] S01: Sending networking broadcast signaling;

[0051] S02: Send complete location information report, including the routing information used;

[0052] S03: The control center obtains the node location information in the ad hoc network and performs the next step of expansion application according to the node location information;

[0053] S04: Entering the idle period, waiting for the next networking cycle;

[0054] S05: When the network is cycled again, only the incremental information of the position is sent;

[0055] S06: After receiving the position increment information, the longitude and latitude increment information and the speed information are transmitted using control signaling according to the time information of the control center time stamp.

[0056] In this embodiment, in the specific steps of business implementation in the existing technology of narrowband self-organizing network, it is necessary to transmit the location information of each node (carrying the route), and the transmission is carried out in the form of short messages, which requires three frames of data (one header frame + two frames of data blocks). At 60ms per frame, it takes 180ms, and according to the four-turn forwarding time, it is 900ms. Then, when the number of nodes is large, the networking time will be very long. For example, if there are 10 terminals, the location route forwarding time will take 9S to complete the networking. With the exit of nodes and the addition of new nodes, the networking information cannot be updated quickly, and the delay is large, which does not meet the needs of fast networking and real-time dynamic adjustment of routing.

[0057] In this embodiment, Figure 4 As shown, it is a flowchart of the entire data transmission, which is divided into two parts, namely the initial networking stage and the periodic networking stage.

[0058] In this embodiment, Figure 2 As shown in the figure, in the initial networking stage, the network broadcast signaling is first sent, and then the complete location information is reported, including the routing information used, so that each terminal will include the route it will pass through in the broadcast signaling when reporting the location information, and the control center will know which nodes all nodes are forwarded through; then enter S03, the control center side can know the location information of all nodes in the self-organizing network, and can further expand the application based on the location information, and then enter the idle cycle, waiting for the next networking cycle, and the waiting time is set by the frequency writing software. In this way, the initial networking stage is completed.

[0059] In this embodiment, Figure 3 As shown, in the periodic networking stage, the incremental position information is sent. After receiving the incremental position information, the longitude and latitude incremental information and speed information are transmitted using control signaling according to the time information of the control center time stamp. This is used as a cycle for cyclic networking, which greatly reduces the networking time and improves efficiency.

[0060] In this embodiment, taking the PDT protocol as an example, the location information needs to be composed of two frames of data blocks, plus a data header, a total of 3 frames, and one of the time slots (which can be set to continuous transmission mode, occupying two time slots) is used for transmission. Each frame is 60ms, and the required time is 180ms (120ms in continuous transmission mode). Taking 10 networks as an example, according to the four-turn reserved position forwarding time, that is, each node is 900ms (600ms in continuous transmission mode), then the routing location information transmission requires 9S (6S for continuous transmission). Every specific period (which can be set to 2 minutes) requires the network broadcast signaling period + 9S of location routing networking time. After the initial networking, the elements of the location information are already known, and there is no need to repeat the transmission when the networking cycle is repeated. Only the incremental information of the location is required. The time information can be marked according to the time of the control center. In actual use, only the incremental information of longitude and latitude and the speed information need to be transmitted, and control signaling is used for transmission.

[0061] In this embodiment, in the actual use stage, the self-increment position information sending system is actually programmed. The following table lists the complete positioning information location definition, which can be used for reference, as shown in Table 1 below:

[0062] Table 1 Definition of complete positioning information bit field

[0063]

[0064]

[0065] In this embodiment, the bit field is discussed by taking the control signal block CSBK frame as an example, and the position increment information CSBK control frame bit field is defined as shown in the following Table 2:

[0066] Table 2 Position increment information CSBK control frame bit field definition

[0067]

[0068] As can be seen from Table 2 above, using control signaling to transmit location routing information only requires one control signaling, which takes 60ms if used in a single time slot. According to the four-turn reserved forwarding time, one node requires 300ms. Calculated based on 10 nodes, the location routing transmission time is 3S. This greatly shortens the location routing transmission time, reduces service collisions, and maximizes the connectivity rate of the self-organizing network. When used in an emergency environment, it is equivalent to providing a precious life greenway.

[0069] This embodiment takes the CSBK frame as an example to discuss the bit field, including but not limited to various valid frames specified in the protocol.

[0070] This embodiment is based on the PDT protocol, including but not limited to narrowband communication protocols such as DPMR, DMR, MDT, TETRA, and EPDT.

[0071] In this embodiment, the address is 7 bits, and the maximum number of nodes supported in a single network is 128. When the number of nodes is large, multiple ad hoc networks can be formed, that is, multiple trunks can be used to transmit data. The position decimal increment information uses 11 bits, and the maximum value is 2047, that is: 0.2047*60s = 12.282min. Calculated at 1.8km per minute, the maximum change in the periodic network transmission position is 22.1076km. Other corresponding definitions that are deformed or expanded according to the bit field definition of this patent to achieve similar functions are all within the scope of protection of this patent.

[0072] Embodiment 2

[0073] On the basis of the above-mentioned embodiment one, in order to enable this embodiment to be used in the actual field, it is selected to be used in a certain area of ​​Hotan, Xinjiang. The Hotan area in Xinjiang has a large regional coverage area and rich and diverse terrain and landforms. In sparsely populated areas, there are situations where base stations have not been built. Under this condition, the system is selected to be used and embodiment two is proposed.

[0074] Specifically, the radiation radius of the terminal is 15-20 km in a flat area, and 6-10 km in an area with buildings or obstructions.

[0075] Specifically, the maximum number of terminals that can be deployed within the radiation radius of one terminal is 400-500.

[0076] In this embodiment, the radiation radius of the main station used has different distances when facing different geographical environments. When there are buildings blocking the view, the radiation radius decreases as the number and density of the blocking objects increase. Therefore, in the actual terminal setting process, the construction distance between terminals is generally selected to be 18km in flat areas and 8km in environments with blocking objects. On the one hand, such a distance setting is within the radiation radius of the terminal, and on the other hand, it avoids problems such as transmission signal interruption when using the maximum distance of the radiation radius.

[0077] In this embodiment, the number of terminals that can be deployed within the radiation radius of a terminal is limited, which can ensure that the data collected by the field devices connected to all terminal devices within the area are effectively and reliably transmitted, ensure the quality of data transmission, and achieve efficient and reliable transmission.

[0078] Embodiment 3

[0079] On the basis of the above-mentioned embodiment 1, in order to make the device applicable to various occasions, this embodiment 3 is specially proposed.

[0080] Specifically, the on-site equipment also includes an intercom terminal.

[0081] In this embodiment, electricity is extremely important to the lives of people in the area. In the event of a natural disaster causing a communication interruption, walkie-talkies are used to communicate within the area of ​​the self-organizing network to promptly inform the outside world of the situation in the disaster area and obtain rescue.

[0082] Embodiment 4

[0083] Specifically, the cycle period of the periodic networking is set by frequency writing parameters, including networking broadcast signaling time, location reporting time, and idle time.

[0084] In this embodiment, if the frequency writing parameter is set to 2s, the networking broadcast signaling will be retransmitted every 2s.

[0085] Specifically, the value of the frequency writing parameter is set according to the degree of rapid change of the network.

[0086] In this embodiment, the value of the frequency writing parameter is set according to the degree of rapid change of the network and the environment in which the network is used. If it is a fast-moving scene, the network may need to be re-established in 30 seconds. In a general walking environment, it is set to 2 minutes.

[0087] In general, the system uses the incremental location information after the construction of the self-organizing network as the data transmission channel. Compared with direct transmission, it greatly shortens the location routing transmission time, reduces business collisions, maximizes the connectivity rate of the self-organizing network, and provides a valuable green life channel when used in emergency environments.

[0088] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

[0089] Many other changes and modifications may be made without departing from the concept and scope of the present invention.It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A narrowband multi-hop ad hoc network incremental location information sending system, characterized in that: It includes terminals and field equipment, wherein there are multiple terminals, and the distance between two adjacent terminals is less than or equal to the radiation radius of the terminals. In such an arrangement, multiple terminals form an ad hoc network, and the field equipment is a power collection terminal, which collects telesignaling data, telemetering data, and remote control data. The data of the field equipment in the area during operation is transmitted through the ad hoc network; The self-organizing network includes two parts: initial networking and periodic networking, wherein S01-S04 is the initial networking stage, and S05-S06 is the periodic networking stage. The data transmission process of the self-organizing network includes the following steps: S01: Sending networking broadcast signaling; S02: Send complete location information report, including the routing information used; S03: The control center obtains the node location information in the ad hoc network and performs the next step of expansion application according to the node location information; S04: Entering the idle period, waiting for the next networking cycle; S05: When the network is cycled again, only the incremental information of the position is sent; S06: After receiving the position increment information, the longitude and latitude increment information and the speed information are transmitted using control signaling according to the time information of the control center time stamp.

2. A narrowband multi-hop ad hoc network incremental location information sending system according to claim 1, characterized in that: The radiation radius of the terminal is 15-20 km in flat areas and 6-10 km in areas with buildings and obstructions.

3. A narrowband multi-hop ad hoc network incremental location information sending system according to claim 1 or 2, characterized in that: The maximum number of field devices that can be deployed within the radiation radius of one terminal is 400-500.

4. A narrowband multi-hop ad hoc network incremental location information sending system according to claim 1, characterized in that: The on-site equipment also includes an intercom terminal.

5. A narrowband multi-hop ad hoc network incremental location information sending system according to claim 1, characterized in that: The cycle period of the periodic networking is set by frequency writing parameters, including networking broadcast signaling time, location reporting time, and idle time.

6. A narrowband multi-hop ad hoc network incremental location information sending system according to claim 5, characterized in that: The value of the frequency writing parameter is set according to the degree of rapid change of the network.

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