Elastic heterogeneous emergency communication networking system

Abstract

The invention discloses an elastic heterogeneous emergency communication networking system, which comprises emergency command communication center equipment, emergency field equipment, a gateway processing module and terminal equipment, and is characterized in that the emergency command communication center equipment is used for receiving information of a rescue field and sending rescue instruction information through an emergency bearer network; the emergency field equipment is in communication connection with the emergency command communication center equipment through an emergency bearer network comprising a plurality of communication modes; the gateway processing module is used for monitoring state information of a link of the accessed emergency bearer network and selecting an accessed link for the terminal equipment according to the state information and service request information of the terminal equipment; and the terminal equipment is accessed to the emergency bearer network through the emergency field equipment. The elastic heterogeneous emergency communication networking system provided by the invention has the technical advantages of random access of communication terminals, automatic recombination of network resources, integration of remote command and field command and the like.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a flexible heterogeneous emergency communication networking system. Background Art

[0002] In the event of natural disasters or accidents requiring emergency rescue, fast, stable and reliable communications are the key to ensuring the smooth progress of rescue operations, especially in complex environments such as high-altitude and cold mountainous areas, deep canyons, and ultra-long tunnels. The emergency communication infrastructure and resource conditions such as communications, electricity, and transportation are poor, and the communication capabilities are weak and scattered. Moreover, in the event of natural disasters and accidents, the risk of damage to the existing fragile communication network due to disasters is greatly increased, and as a result, it is very likely that the emergency rescue site will not be able to provide stable and reliable communication services. Moreover, due to the weakness of basic communication capabilities and the damage caused by disasters and accidents, it will be a huge challenge to provide fast communication networking and reliable communication services for the needs of emergency rescue at the emergency rescue site. In other words, due to the problems of complex network laying, poor equipment environment adaptability, single communication format, slow networking and link establishment response speed in existing communication equipment and corresponding networking technologies, it is unable to meet the emergency rescue communication needs when disasters and accidents occur under complex natural environments and engineering construction conditions.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a flexible heterogeneous emergency communication networking system to achieve terminal equipment access and remote command intervention through automatic reorganization of network resources, thereby solving the technical problems existing in the prior art.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A flexible heterogeneous emergency communication networking system includes emergency command and communication center equipment, emergency field equipment and a gateway processing module, wherein:

[0007] Emergency command and communication center equipment, used to receive information from the rescue site and send rescue command information through the emergency bearer network;

[0008] The emergency field equipment establishes a communication connection with the emergency command and communication center equipment through an emergency bearer network including multiple communication modes; it also allocates IP addresses to terminal equipment at the rescue site based on the DHCP address pool it sets, and uses a lease renewal timer to control the terminal equipment to update the IP address; the DHCP address pools of the emergency field equipment are set to be different;

[0009] A gateway processing module is distributedly arranged in the system, and each gateway processing module is independently arranged or arranged in the emergency on-site device, and is used to monitor the state information of the link of the accessed emergency bearer network, and select the link to be accessed for the terminal device according to the state information, the location of the terminal device and its service request information;

[0010] Among them, the process of the emergency field equipment using the lease renewal timer to control the terminal equipment to update the IP address includes: after the terminal equipment obtains the IP address, the lease renewal timer is started; when the lease renewal timer reaches a predetermined time period before the lease expires, the emergency field equipment is requested to renew the current IP address; if the emergency field equipment determines that the terminal equipment does not need to update the IP address, it will reply to the terminal equipment to agree to renew the lease; if the renewal response of the emergency field equipment is not received at the expiration of the DHCP lease renewal timer, or a renewal request rejection is received, the terminal equipment requests to update the IP address so that other emergency field equipment can allocate an IP address and a gateway processing module to it.

[0011] The emergency bearer network including multiple communication modes includes: public mobile communication network, wired communication network, satellite communication network, and emergency dedicated line or network; the emergency on-site equipment includes: handheld emergency communication equipment, backpack emergency communication equipment and / or emergency communication vehicle.

[0012] The system also includes on-site emergency command and communication equipment, which is used to form an ad hoc network with the emergency on-site equipment, obtain rescue instruction information sent by the emergency command and communication center equipment, and send the collected rescue site information to the emergency command and communication center equipment.

[0013] The system also includes a terminal device, and the terminal device is connected to the emergency site equipment through a Wi-Fi interface, an RJ45 interface or an optical fiber interface, and establishes a communication connection with the on-site emergency command communication equipment and the emergency command communication center equipment.

[0014] The system also includes:

[0015] When the user terminal location changes, the connected emergency field equipment fails, the connected gateway processing module fails, or the connected emergency field equipment cannot be connected to the emergency bearer network, the emergency field equipment connected to the terminal device is updated, and the IP address and gateway processing module assigned to it are updated as needed.

[0016] The configuration method of the DHCP address pool of each of the emergency on-site devices includes:

[0017] When the LAN IP address used by the user terminal is: 10.0.0.1~10.255.255.254 network segment, and the mask is 16 bits; then the DHCP address pool of the emergency field equipment is set to: 10.0.X.1~10.255.X.254 network segment, where X is the number of the emergency field equipment, and the value range of X is 0~254.

[0018] The process of the gateway processing module monitoring the status information of the link of the accessed emergency bearer network includes: monitoring the connection status of each link, the data transmission delay and the bandwidth information of the link; and the service request information sent by the terminal device to the emergency command and communication center device includes the corresponding service type and service quality requirement information.

[0019] The process of the gateway processing module selecting a link for the terminal device to access includes:

[0020] When the communication link between a gateway and the emergency command and communication center equipment is normal, the terminal equipment obtains the IP address of the gateway through the DHCP service and uses the gateway to establish communication with the emergency command and communication center equipment;

[0021] When a communication link between a gateway and the emergency command and communication center equipment fails, the information that the gateway is unavailable is notified to all DHCP services in the network, so that when the terminal device obtains the IP address of the gateway through the DHCP service, the IP address of the gateway will no longer be provided to it, but the IP address of other gateways will be provided.

[0022] The gateway processing module also includes:

[0023] Monitor the link status information of each emergency bearer network in real time, select the corresponding link to communicate with the emergency command and communication center equipment according to the network status information and service request information, and automatically select the optimal communication path for the terminal equipment update according to the real-time location of the terminal equipment and the load balancing strategy.

[0024] Compared with the prior art, the elastic heterogeneous emergency communication networking system provided by the present invention has the technical characteristics of random access to communication terminals, automatic reorganization of network resources, and integration of remote command and on-site command. Specifically, the present invention can seamlessly integrate multiple emergency communication nodes and multiple communication formats into a reliable, interoperable communication network. And through the gateways set on different communication nodes, load balancing and rapid response can also be achieved, and dynamic adjustment can be supported, which can adapt to changes in the network environment and ensure the continuity and stability of communication. Furthermore, the present invention can also achieve random access to terminal devices, that is, according to the location of the terminal device and the quality of the communication network, the data transmission path is dynamically calculated and optimized to ensure that when the location of the terminal device changes, the best communication connection can be maintained to reduce communication interruptions and data loss caused by network switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the architecture of a flexible heterogeneous emergency communication networking system provided by an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of a distributed gateway provided in an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of gateway fault switching provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0030] First, the terms that may be used in this article are explained as follows:

[0031] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0032] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0033] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0034] The term "parts by mass" refers to the mass ratio relationship between multiple components. For example, if it is described that component X is x parts by mass and component Y is y parts by mass, then the mass ratio of component X to component Y is x:y. 1 part by mass can represent any mass, for example, 1 part by mass can be represented as 1 kg or 3.1415926 kg. The sum of the parts by mass of all components is not necessarily 100 parts, but can be greater than 100 parts, less than 100 parts or equal to 100 parts. Unless otherwise specified, the parts, proportions and percentages described herein are all measured by mass.

[0035] Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0036] When concentration, temperature, pressure, size or other parameters are expressed in the form of a numerical range, the numerical range should be understood to specifically disclose all ranges formed by the pairing of any upper limit, lower limit, and preferred value in the numerical range, regardless of whether the range is explicitly stated; for example, if a numerical range of "2 to 8" is stated, the numerical range should be interpreted as including ranges such as "2 to 7", "2 to 6", "5 to 7", "3 to 4 and 6 to 7", "3 to 5 and 7", "2 and 5 to 7", etc. Unless otherwise specified, the numerical ranges stated herein include both their end values ​​and all integers and fractions within the numerical range.

[0037] The orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of this document.

[0038] The following is a detailed description of a resilient heterogeneous emergency communication networking system provided by the present invention. The contents not described in detail in the embodiments of the present invention belong to the prior art known to professional and technical personnel in the field. If no specific conditions are specified in the embodiments of the present invention, the conventional conditions in the field or the conditions recommended by the manufacturer shall be followed. The reagents or instruments used in the embodiments of the present invention, if the manufacturer is not specified, are all conventional products that can be purchased commercially.

[0039] The present invention specifically proposes a flexible heterogeneous emergency communication networking system, which has the technical characteristics of random access of communication terminals, automatic reorganization of network resources, and integration of remote command and on-site command.

[0040] Specifically, the implementation process of a corresponding elastic heterogeneous emergency communication networking system includes: (1) providing an architecture of an elastic heterogeneous emergency communication networking system

[0041] Compared with traditional networks with relatively fixed topology, the elastic heterogeneous emergency communication network architecture provided by the present invention can be deployed on demand according to different scenarios, and can be deployed in layers and flexibly matched. The scale of network deployment can be large or small, and the number of terminal devices that can be accessed can be more or less. The corresponding communication nodes (i.e., emergency field equipment) include fixed and mobile nodes, which can be freely distributed in time and space, and the corresponding network can be automatically reconstructed; and the emergency communication network can support public mobile communications, broadband satellite communications, wireless ad hoc networks, WLAN, wired communications and other communication standards, that is, multiple emergency communication nodes (i.e., emergency field equipment, referred to as communication nodes) and multiple communication standards can be seamlessly integrated into a reliable and interoperable emergency communication network.

[0042] (2) Implemented distributed gateway technology

[0043] In the above-mentioned emergency communication network, the present invention also distributes the gateway (i.e., gateway processing module) functions among different communication nodes to implement a dynamic routing strategy based on the network topology and the working status of the emergency communication node. Specifically, it can automatically select the optimal communication path according to the network status and the location of the terminal (i.e., terminal device, referred to as terminal) to achieve load balancing and rapid response; and the strategy can also support dynamic adjustment, adapt to changes in the network environment, and ensure the continuity and stability of communication.

[0044] (3) Realizes the random access mode of user terminals (i.e. terminal devices)

[0045] In emergency rescue scenarios, mobile terminals (i.e., terminal devices) may constantly change their positions in the emergency communication network due to the rapid movement of rescue personnel, complex and changing environments, or emergency evacuation needs. To address this challenge, an innovative mobile communication terminal (i.e., terminal device) random access method is proposed to ensure communication continuity and efficiency during rescue operations. This random access method can dynamically calculate and optimize the data transmission path based on the terminal location and network quality, ensuring that the best communication connection can be maintained when the user terminal location changes, reducing communication interruption and data loss caused by network switching.

[0046] To facilitate the understanding of the present invention, the specific implementation process of the present invention will be described in detail below with reference to the accompanying drawings.

[0047] The present invention provides a flexible heterogeneous emergency communication networking system, the specific network architecture of which is as follows: Figure 1 As shown, it can mainly include emergency center equipment, emergency on-site equipment and emergency bearer network; among which:

[0048] The emergency center equipment may include, but is not limited to, emergency command and communication center equipment and network security equipment. The emergency command and communication center equipment is responsible for the registration, authentication, call processing, media stream processing, and business process processing of various on-site equipment and terminal equipment, and has the function of receiving information from the rescue site and sending rescue command information through the emergency bearer network. It may include command and dispatch, real-time voice, video conferencing, data collection, information transmission, etc.

[0049] The emergency bearer network may include, but is not limited to: emergency dedicated lines and the public Internet. The public Internet refers to a fixed network accessed through a public mobile communication network, a wired communication network, or a broadband satellite communication network. The emergency dedicated line is a communication line or network dedicated to emergency communications, such as a railway dedicated network, a power dedicated network, etc.;

[0050] The emergency on-site equipment may include, but is not limited to, various emergency communication nodes such as handheld emergency communication equipment, backpack emergency communication equipment, emergency communication vehicles, etc., which can be connected to public mobile communications, wired communications, satellite communications, emergency dedicated lines, etc., and on-site emergency command communication equipment can also be temporarily deployed on-site. Emergency on-site equipment is interconnected using ad hoc networks or WLAN, and all on-site equipment is in a local area network;

[0051] Specifically, the emergency field equipment can establish a communication connection with the emergency command and communication center equipment through an emergency bearer network including multiple communication modes; it can also allocate IP addresses to terminal equipment at the rescue site based on the DHCP address pool it sets, and use a lease renewal timer to control the terminal equipment to update the IP address; the DHCP address pools of the emergency field equipment are set to be different;

[0052] Among them, the process of the emergency field equipment using the lease renewal timer to control the terminal equipment to update the IP address includes: after the terminal equipment obtains the IP address, the lease renewal timer is started; when the lease renewal timer reaches a predetermined time period before the lease expires, the emergency field equipment is requested to renew the current IP address; if the emergency field equipment determines that the terminal equipment does not need to update the IP address, it will reply to the terminal equipment to agree to renew the lease; if the renewal response of the emergency field equipment is not received at the expiration of the DHCP lease renewal timer, or a renewal request rejection is received, the terminal equipment requests to update the IP address so that other emergency field equipment can allocate an IP address and a gateway processing module to it.

[0053] like Figure 1 As shown, the system also includes on-site emergency command and communication equipment, which is used to form an ad hoc network with the emergency on-site equipment, obtain rescue instruction information sent by the emergency command and communication center equipment, and send the collected rescue site information to the emergency command and communication center equipment.

[0054] Reference Figure 2 As shown, in the above elastic heterogeneous emergency communication networking system, a gateway processing module may also be included, which is arranged in the system in a distributed manner, and each gateway processing module may be independently arranged, or may be arranged in the emergency field device in the networking system, so as to monitor the state information of the link of the accessed emergency bearer network, and select the access link for the terminal device according to the state information, the location of the terminal device and its service request information, and establish a corresponding route to realize the communication between the user terminal (i.e., the terminal device) and the emergency command center device; for example, the following processing process may be specifically adopted to select the access link for the terminal device, namely:

[0055] 1) When the communication link between a gateway and the emergency command and communication center equipment is normal, the user terminal can obtain the IP address of the gateway through the DHCP service and use the gateway to communicate with the emergency command and communication center equipment;

[0056] 2) When the communication link between a gateway and the emergency command center equipment fails, all DHCP services in the network will be notified that the gateway is temporarily unavailable, so that the IP address of the gateway cannot be issued to the user terminal during the process of the user terminal obtaining the IP address of the gateway through the DHCP service, and the IP addresses of other gateways can be used in the process of providing DHCP services to the user terminal; that is, when a gateway in the system fails or the connection with the emergency bearer network is interrupted (unable to communicate with the emergency command center equipment), Figure 3 As shown, the user terminal can select other gateways to communicate with the emergency command center equipment, thereby improving the reliability of the network;

[0057] 3) When the gateway is working, it monitors the link status information of each emergency bearer network in real time, and selects the appropriate link to communicate with the emergency command communication center equipment according to the network status information and service request information.

[0058] Specifically, the corresponding gateway processing module (referred to as gateway) is arranged in the emergency field equipment in the networking system and may include: if the corresponding handheld emergency communication equipment, backpack emergency communication equipment, emergency communication vehicle and other types of emergency communication nodes have the function of accessing the emergency bearer network, they can also be used as gateway applications, which is equivalent to the implementation method in which the gateway processing module is built into the emergency field equipment; Figure 2 As shown, there can be two or more gateways in the elastic heterogeneous emergency communication networking system.

[0059] In the above system, when the user terminal communicates with the emergency command center equipment, the corresponding gateway for communication is selected according to the emergency communication node connected, and different user terminals in the system may be assigned different gateways. The gateway monitors the link status information of each emergency bearer network connected in real time, including the connection status of each link, the delay of data transmission and the bandwidth information of the link, etc.; when the user terminal sends service request information to the emergency center equipment, the service request information includes the service type and service quality requirements, such as video service, voice service, data service, etc. According to the real-time monitoring results, the gateway can select the appropriate link to establish the route according to the network status information and service request information.

[0060] When the user terminal moves, the optimal communication path can be automatically updated for the terminal device based on the real-time location of the terminal device and the load balancing strategy; that is, the access emergency communication node can be replaced according to the changes in the location of the user terminal, and its gateway can be updated accordingly, thereby providing the user terminal with the best connection experience and improving the flexibility of the network.

[0061] Furthermore, the above elastic heterogeneous emergency communication networking system may also include terminal equipment (i.e., user terminals or terminal users), and various terminal users at the emergency rescue site may access the emergency site equipment through Wi-Fi interfaces, RJ45 interfaces, and optical fiber interfaces, and then establish communication connections with the on-site emergency command communication equipment and the emergency command center equipment. The corresponding user terminal access implementation process may include: the IP address allocation process and the IP address update process, and the corresponding process is implemented by the emergency site equipment control, wherein:

[0062] (1) IP address allocation process

[0063] Emergency communication nodes (i.e., emergency on-site equipment) can provide different interface forms such as Wi-Fi, RJ45, and optical fiber interfaces for user terminal access, and emergency communication nodes have DHCP server functions to assign IP addresses to user terminals; the IP addresses assigned to all emergency communication nodes are within the same LAN range. To avoid IP address conflicts, the DHCP address pool network segments of each emergency communication node can be set to be different. For example, the LAN IP address used by the user terminal is in the 10.0.0.1~10.255.255.254 network segment, and the mask is 16 bits; among them, the address pool of the emergency communication node is in the 10.0.X.1~10.255.X.254 network segment, where X is the number of the emergency communication node, and the value range is 0~254.

[0064] (2) IP address update process

[0065] When one of the following three situations occurs, the user terminal needs to update the IP address:

[0066] 1) The mobile terminal as a user terminal needs to access a new emergency communication node due to location changes;

[0067] 2) Emergency communication node failure or gateway failure, unable to provide a communication channel between the mobile terminal and the emergency center equipment;

[0068] 3) The connection between the emergency communication node and the emergency bearer network is interrupted.

[0069] When any of the above situations occurs, the emergency communication node accessed by the terminal device is updated, and the IP address and gateway assigned thereto are updated as needed, that is, the corresponding gateway may or may not be updated as needed.

[0070] Specifically, the corresponding lease renewal timer can be set on the emergency communication node and the mobile terminal to control the mobile terminal to update the IP address through the lease renewal timer; in the implementation process, when the mobile terminal obtains the IP address from the emergency communication node DHCP server, the emergency communication node will notify the mobile terminal of the value of the DHCP lease renewal timer while allocating the IP address. The lease renewal timer is used for the mobile terminal to request renewal from the DHCP server when the lease reaches a certain proportion. After the mobile terminal obtains the IP address, the lease renewal timer will be started according to the value of the lease renewal timer, and when the timer reaches half of the lease, it will request renewal of the current IP address from the emergency communication node. If the emergency communication node determines that the user terminal does not need to update the IP address, it will reply to the mobile terminal to agree to renew the lease and continue to use the IP address until the next lease renewal point. If the emergency communication node does not receive a renewal response before the DHCP lease expires, or the emergency communication node rejects the renewal request, the mobile terminal can request a new IP address, and other emergency communication nodes will allocate an IP address and gateway for it.

[0071] In order to improve the access response and fault response speed of the emergency communication network, the DHCP lease renewal timer can be shortened as much as possible, such as setting it to about 1 minute.

[0072] Further, still refer to Figures 1 to 3 As shown, in the specific implementation of the networking process, a flexible heterogeneous emergency communication networking system provided by the present invention may include establishing a networking structure between an emergency command and communication center device and an emergency field device, a gateway processing module and a terminal device, wherein the terminal device establishes a communication connection with the emergency command and communication center device through the emergency field device, the gateway processing module and the emergency bearer network, and the gateway processing module may be independently arranged in the system, or may also be arranged in the emergency field device, and the gateway processing module is distributed in the networking system architecture, wherein:

[0073] The emergency on-site equipment can allocate IP addresses to terminal equipment based on their respective DHCP address pools, and the DHCP address pools of the emergency on-site equipment are set to be different;

[0074] The gateway processing module can select a link for the terminal device to access based on the state information of the link of the accessed emergency bearer network, the location of the terminal device and the service request information of the terminal device obtained by monitoring;

[0075] After the terminal device is connected to the emergency field device, the connected emergency field device can be responsible for allocating an IP address to it, and use the DHCP lease renewal timer to control the terminal device to update the IP address. The process of updating the IP address may include: after the terminal device obtains the IP address, starting the lease renewal timer, when the lease renewal timer reaches a predetermined time period before the lease expires, requesting the emergency field device to renew the current IP address, if the emergency field device determines that the terminal device does not need to update the IP address, it will reply to the terminal device that it agrees to renew the lease, if the renewal response of the emergency field device is not received when the DHCP lease renewal timer expires, or a renewal request rejection is received, the terminal device requests to update the IP address so that other emergency field devices can allocate an IP address and a gateway processing module to it.

[0076] It can be seen from the networking architecture of the above system that the present invention can deploy emergency communication equipment on demand according to the emergency rescue scenario, the emergency communication network can be deployed in layers, the network scale is scalable, the number of equipment can be more or less, it can be freely distributed in time and space, and the network can be automatically reconstructed. And through distributed gateway technology, the emergency communication network can deploy multiple gateway nodes, dynamically adjust the routing strategy according to the network topology and the working status of the emergency communication node, and automatically select the optimal communication path according to the network status and the location of the terminal, so as to improve the reliability of the emergency communication network. Furthermore, it is also possible to realize the random access of user terminals, that is, when the user terminal location changes, the emergency communication node fails, and the bearer network is interrupted, the data transmission path is dynamically calculated and optimized to ensure that the best communication connection can be maintained.

[0077] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A flexible heterogeneous emergency communication networking system, characterized in that: It includes emergency command and communication center equipment, emergency field equipment and gateway processing modules, including: Emergency command and communication center equipment, used to receive information from the rescue site and send rescue command information through the emergency bearer network; The emergency field equipment establishes a communication connection with the emergency command and communication center equipment through an emergency bearer network including multiple communication modes; it also allocates IP addresses to terminal equipment at the rescue site based on the DHCP address pool it sets, and uses a lease renewal timer to control the terminal equipment to update the IP address; the DHCP address pools of the emergency field equipment are set to be different; A gateway processing module is distributedly arranged in the system, and each gateway processing module is independently arranged or arranged in the emergency on-site device, and is used to monitor the state information of the link of the accessed emergency bearer network, and select the link to be accessed for the terminal device according to the state information, the location of the terminal device and its service request information; Among them, the process of the emergency field equipment using the lease renewal timer to control the terminal equipment to update the IP address includes: after the terminal equipment obtains the IP address, the lease renewal timer is started; when the lease renewal timer reaches a predetermined time period before the lease expires, the emergency field equipment is requested to renew the current IP address; if the emergency field equipment determines that the terminal equipment does not need to update the IP address, it will reply to the terminal equipment to agree to renew the lease; if the renewal response of the emergency field equipment is not received at the expiration of the DHCP lease renewal timer, or a renewal request rejection is received, the terminal equipment requests to update the IP address so that other emergency field equipment can allocate an IP address and a gateway processing module to it.

2. The system according to claim 1, characterized in that The emergency bearer network including multiple communication modes includes: public mobile communication network, wired communication network, satellite communication network, and emergency dedicated line or network; the emergency on-site equipment includes: handheld emergency communication equipment, backpack emergency communication equipment and / or emergency communication vehicle.

3. The system according to claim 1, characterized in that The system also includes on-site emergency command and communication equipment, which is used to form an ad hoc network with the emergency on-site equipment, obtain rescue instruction information sent by the emergency command and communication center equipment, and send the collected rescue site information to the emergency command and communication center equipment.

4. The system according to claim 1, characterized in that The system also includes a terminal device, and the terminal device is connected to the emergency site equipment through a Wi-Fi interface, an RJ45 interface or an optical fiber interface, and establishes a communication connection with the on-site emergency command communication equipment and the emergency command communication center equipment.

5. The system according to any one of claims 1 to 4, characterized in that: The system also includes: When the user terminal location changes, the connected emergency field equipment fails, the connected gateway processing module fails, or the connected emergency field equipment cannot be connected to the emergency bearer network, the emergency field equipment connected to the terminal device is updated, and the IP address and gateway processing module assigned to it are updated as needed.

6. The system according to claim 5, characterized in that The configuration method of the DHCP address pool of each of the emergency on-site devices includes: When the LAN IP address used by the user terminal is: 10.0.0.1~10.255.255.254 network segment, and the mask is 16 bits; then the DHCP address pool of the emergency field equipment is set to: 10.0.X.1~10.255.X.254 network segment, where X is the number of the emergency field equipment, and the value range of X is 0~254.

7. The system according to claim 5, characterized in that The process of the gateway processing module monitoring the status information of the link of the accessed emergency bearer network includes: monitoring the connection status of each link, the data transmission delay and the bandwidth information of the link; and the service request information sent by the terminal device to the emergency command and communication center device includes the corresponding service type and service quality requirement information.

8. The system according to claim 5, characterized in that The process of the gateway processing module selecting a link for the terminal device to access includes: When the communication link between a gateway and the emergency command and communication center equipment is normal, the terminal equipment obtains the IP address of the gateway through the DHCP service and uses the gateway to establish communication with the emergency command and communication center equipment; When a communication link between a gateway and the emergency command and communication center equipment fails, the information that the gateway is unavailable is notified to all DHCP services in the network, so that when the terminal device obtains the IP address of the gateway through the DHCP service, the IP address of the gateway will no longer be provided to it, but the IP address of other gateways will be provided.

9. The system according to claim 8, characterized in that The gateway processing module also includes: Monitor the link status information of each emergency bearer network in real time, select the corresponding link to communicate with the emergency command and communication center equipment according to the network status information and service request information, and automatically select the optimal communication path for the terminal equipment update according to the real-time location of the terminal equipment and the load balancing strategy.

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