Guard module, service base station node, service terminal node and communication system

Abstract

The invention relates to the technical field of wireless communication, and particularly discloses a guard module, a service base station node, a service terminal node and a communication system, and the guard module comprises a communication component which is used for interacting with communication components of other guard modules belonging to the same communication system so as to construct a guard network independent of a service network, based on the guard network, at least air interface spectrum situation awareness, cooperative frequency switching and service data transmission between service base stations are realized; the intelligent control unit is in communication connection with the sensing component, and is used for obtaining a network-level frequency utilization strategy according to the air interface frequency spectrum situation reported by the sensing component and other guard modules and the cooperative frequency switching information, and diffusing the network-level frequency utilization strategy through a guard network; and the clock unit is in communication connection with the sensing assembly and is used for at least providing clock service for the sensing assembly and the intelligent control unit. The guard module provided by the invention can improve the anti-interference capability of a wireless network.

Description

Technical Field

[0001] The present invention relates to the field of wireless communications, and in particular to a guard module, a service base station node, a service terminal node and a communication system. Background Art

[0002] Commercial wireless network technologies, represented by 5G, have been widely deployed and applied due to their numerous advantages, including large bandwidth, low latency, and ultra-large-scale networking. These technologies have significantly changed people's lifestyles and driven rapid social progress. These networks are typically centered around base stations, providing access services to terminals distributed across various locations. The entire network operates on specific frequencies that are not accessible to other wireless devices to prevent interference. When commercial wireless networks are applied to specialized areas (such as emergency situations), they lack the ability to resist interference and attacks. Therefore, when encountering malicious interference or active attacks, network performance degrades significantly, communications degrade, and even cause service interruptions and network paralysis within the base station's coverage area.

[0003] Therefore, how to improve the anti-interference capability of wireless networks has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0004] The present invention provides a guard module, a service base station node, a service terminal node and a communication system, which solve the problem of poor anti-interference capability of wireless networks existing in related technologies.

[0005] As a first aspect of the present invention, a guard module is provided, comprising: A synaesthesia component is configured to interact with synaesthesia components of other guard modules within the same communication system to build a guard network independent of the service network, and to implement at least air interface spectrum situational awareness, coordinated frequency switching, and service data transmission between service base stations based on the guard network; An intelligent control unit, communicatively connected to the synaesthesia component, configured to obtain a network-level frequency utilization strategy based on the air interface spectrum situation and coordinated frequency switching information reported by the synaesthesia component and other guard modules, generate a service network frequency point change time and frequency point according to the network-level frequency utilization strategy, and diffuse the service network frequency point change time and frequency point to service base station nodes and / or service terminal nodes via the guard network; A clock unit is communicatively connected to the synaesthesia component and is used to provide a clock service for at least the synaesthesia component and the intelligent control unit.

[0006] Furthermore, the synaesthesia component includes at least one contact unit and N business units, wherein N is a natural number greater than or equal to 0, and the business unit is communicatively connected with the contact unit. The contact unit is used to form a contact channel, and the service unit is used to form a bearer channel. The contact channel and the bearer channel together constitute the guard network. The communication channel can at least transmit coordinated frequency switching messages, network topology maintenance messages, forwarding strategy negotiation messages and air interface spectrum situation awareness information, and the bearer channel is used to transmit at least service data between service base stations.

[0007] Furthermore, the synaesthesia component can also generate air interface simulation signals of the service base station and / or service terminal to achieve air interface behavior simulation of the service base station and / or service terminal.

[0008] Furthermore, the intelligent control unit can also collaboratively control the dynamic synchronous switching frequency of the service base station and / or service terminal, can collaboratively control the simulation base station and / or simulation terminal, and can control the synesthesia component to generate analog signals of the service base station and / or service terminal; wherein the simulation base station is used to simulate the air interface behavior of the service base station, and the simulation terminal is used to simulate the air interface behavior of the service terminal.

[0009] As another aspect of the present invention, a service base station node is provided, which includes a service base station and a service base station guard module, wherein the service base station guard module is communicatively connected to the service base station, and the service base station guard module includes the guard module described above, The service base station guard module can provide the service base station with a timing signal for synchronization timing, and can send a coordinated frequency switching control instruction to the service base station to control air interface frequency switching; The service base station can provide wireless access services and can send service data between service base stations to the service base station guard module, so that the service base station guard module relays and forwards the service data between the service base stations.

[0010] Furthermore, the service base station guard module can provide the service base station with a timing signal for synchronization timing through a timing interface, including: When it is determined that the service base station guard module has a valid external synchronization source, the local clock of the service base station guard module follows the external synchronization source, and its own clock source type is set to the external synchronization source, and its own clock information is published through the guard network; When it is determined that there is no valid external synchronization source for the service base station guard module, the target clock source and target tracking source are determined in turn. Determining the target clock source includes: a) The service base station guard module initially uses the local clock as the reference, sets its own clock source type to self-synchronization, and publishes its own clock information through the guard network; b) When the service base station guard module receives clock information issued by other service base station guard modules in the guard network, it determines the target clock source according to a preset clock source priority principle, wherein the preset clock source priority principle includes at least: a clock source type principle, a start time principle, and a first node ID principle. The clock source type principle is to give priority to selecting the clock of the service base station guard module with a higher clock source level as the target clock source; the start time principle is to give priority to selecting the clock of the service base station guard module with a longer start time as the target clock source; and the first node ID principle is to give priority to selecting the clock of the service base station guard module with a smaller or larger ID as the target clock source; Determining the target tracking source includes: The service base station guard module determines whether its own clock source is the target clock source; If the own clock source is the target clock source, the target tracking source is determined to be the service base station guard module itself; If the own clock source is not the target clock source, the target tracking source is determined according to the preset priority principle of the tracking source, wherein the preset priority principle of the tracking source includes at least the hop number principle and the second node ID principle. The hop number principle is to give priority to selecting a one-hop neighbor service base station guard module with the least network hops to reach the service base station guard module where the target clock source is located as the target tracking source. The second node ID principle is to give priority to selecting a one-hop neighbor service base station guard module with a small or large ID that can reach the service base station guard module where the target clock source is located as the target tracking source. After the target clock source and / or target tracking source is determined, the service base station guard module maintains time synchronization with the target clock source and / or target tracking source via the guard network, and transmits synchronization information via the guard network.

[0011] As another aspect of the present invention, a service terminal node is provided, comprising a service terminal and a service terminal guard module, wherein the service terminal guard module is communicatively connected to the service terminal, and the service terminal guard module comprises the guard module described above. The service terminal guard module can send a coordinated frequency switching control instruction to the service terminal to control the air interface frequency switching; The service terminal can access the service base station through a wireless access service and keep synchronization with the service base station.

[0012] Furthermore, the synaesthesia component in the service terminal guard module includes a contact unit, and the service terminal guard module is connected to the guard network through the contact unit.

[0013] As another aspect of the present invention, a communication system is provided, comprising the service base station node and the service terminal node as described above, wherein the service base station node and the service terminal node are communicatively connected; The service base station and the service terminal can form a service network; The service base station guard module and the service terminal guard module can form a guard network, and the service base station guard module and the service terminal guard module can share the air interface spectrum situation changes they perceive through the guard network to assist in realizing the air interface frequency switching of the service base station and the service terminal.

[0014] Furthermore, it also includes: Simulate base station nodes and simulate terminal nodes, The simulated base station node includes a simulated base station and a simulated base station guard module, and the simulated base station guard module includes the guard module described above. The simulated base station is used to simulate the air interface behavior of the service base station, and the simulated base station guard module is used to connect to the guard network and control the simulated behavior of the simulated base station; The simulated terminal node includes a simulated terminal and a simulated terminal guard module, wherein the simulated terminal guard module includes the guard module described above. The simulation terminal is used to simulate the air interface behavior of the service terminal, and the simulation terminal guard module is used to connect to the guard network and control the simulation behavior of the simulation terminal.

[0015] The guard module provided by the present invention can construct a guard network independent of the service network through the inter-sensory component, and implement functions such as air interface spectrum situational awareness based on the guard network. The intelligent control unit can obtain the network-level frequency utilization strategy, thereby obtaining the current frequency utilization strategy for the service network equipped with the guard module. In addition, the clock service implemented by the clock unit can ensure that the guard module and the service network clock are consistent. Therefore, when the guard module is applied to service base stations and / or service terminals, it can effectively improve the reliability of the service network, making the wireless network resistant to interference and attack. Therefore, the guard module provided by the present invention can effectively improve the reliability of the wireless network. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention.

[0017] Figure 1 This is a structural block diagram of the guard module provided by the present invention.

[0018] Figure 2This is a structural block diagram of the service base station node provided by the present invention.

[0019] Figure 3 This is a structural block diagram of the service terminal node provided by the present invention.

[0020] Figure 4 This is a structural block diagram of the simulated base station / terminal node provided by the present invention.

[0021] Figure 5 This is a structural block diagram of an implementation of the simulated base station / terminal guard module provided by the present invention.

[0022] Figure 6 This is a schematic diagram of the network architecture of the communication system provided by the present invention.

[0023] Figure 7 This is a schematic diagram of the architecture of a 5G single-base station single-sector deployment network provided by the present invention.

[0024] Figure 8 This is a structural block diagram of a service base station node in a 5G single base station sector network provided by the present invention.

[0025] Figure 9 This is a structural block diagram of a service terminal node in a 5G single base station sector network provided by the present invention.

[0026] Figure 10 This is a structural block diagram of a specific implementation scheme of simulating a base station node in a 5G single base station sector network provided by the present invention.

[0027] Figure 11 This is a structural block diagram of a specific implementation scheme of the simulated terminal guard module in the 5G single base station sector network provided by the present invention.

[0028] Figure 12 This is a schematic diagram of the architecture of the 5G multi-base station single-sector deployment network provided by the present invention.

[0029] Figure 13 A schematic diagram of a multi-sector base station provided by the present invention. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate for the embodiments of the present invention described herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatuses.

[0033] In this embodiment, a guard module is provided. Figure 1 is a structural block diagram of the guard module 100 according to an embodiment of the present invention, such as Figure 1 Shown, including: The interawareness component 110 is configured to interact with the interawareness components of other guard modules within the same communication system to build a guard network independent of the service network, and to implement at least air interface spectrum situational awareness, coordinated frequency switching, and service data transmission between service base stations based on the guard network; An intelligent control unit 120 is communicatively connected to the synaesthesia component, and is configured to obtain a network-level frequency utilization strategy based on the air interface spectrum situation and coordinated frequency switching information reported by the synaesthesia component and other guard modules, generate a service network frequency point change time and frequency point according to the network-level frequency utilization strategy, and spread the service network frequency point change time and frequency point to service base station nodes and / or service terminal nodes via the guard network; The clock unit 130 is in communication with the synaesthesia component and is configured to provide a clock service for at least the synaesthesia component and the intelligent control unit.

[0034] In the embodiment of the present invention, Figure 1 As shown, the guard module 100 may specifically include a timing interface, a service interface, a control interface, and a management interface. The synaesthesia component 110 may specifically provide external bearer services through the service interface to assist in expanding service network coverage and guarding network relay blind spots.

[0035] The intelligent control unit 120 can specifically control and manage peripherals (such as service base stations, service terminals, etc.) through a control interface, interact with and accept management of an external intelligent control unit through a management interface; the intelligent control unit 120 can also collaboratively control simulated base stations and / or simulated terminals through a control interface. In addition, the intelligent control unit 120 can also control the synesthesia component to generate simulated signals of the service base station / terminal, and simulate the air interface behavior of the service base station and / or simulated terminal at a specified time and frequency.

[0036] The clock unit 130 specifically supports providing synchronous timing services to external devices via a timing interface. It also provides clock services to other functional units within the guard module. When an external synchronization signal, such as Beidou or GPS, is input, the clock unit 130 adjusts the local clock based on that signal. When no external synchronization signal is input, the clock unit 130 adjusts the local clock based on the output of the synaesthesia component 110.

[0037] The guard module provided by the present invention can construct a guard network independent of the service network through the inter-sensory component, and implement functions such as air interface spectrum situational awareness based on the guard network. The intelligent control unit can obtain the network-level frequency utilization strategy, thereby obtaining the current frequency utilization strategy for the service network equipped with the guard module. In addition, the clock service implemented by the clock unit can ensure that the guard module and the service network clock are consistent. Therefore, when the guard module is applied to service base stations and / or service terminals, it can effectively improve the reliability of the service network, making the wireless network resistant to interference and attack. Therefore, the guard module provided by the present invention can effectively improve the reliability of the wireless network.

[0038] Specifically, in the embodiment of the present invention, Figure 1 As shown, the synaesthesia component 110 includes at least one contact unit 111 and N business units 112, where N is a natural number greater than or equal to 0. The business unit 112 is in communication with the contact unit 111. The contact unit 111 is used to form a contact channel, and the service unit 112 is used to form a bearer channel. The contact channel and the bearer channel together constitute the guard network. The communication channel can at least transmit coordinated frequency switching messages, network topology maintenance messages, forwarding strategy negotiation messages and air interface spectrum situation awareness information, and the bearer channel is used to transmit at least service data between service base stations.

[0039] It should be understood that the interawareness component 110 in this embodiment of the present invention can specifically be composed of one contact unit and N service units, where N ≥ 0. When N equals 0, the guard module does not include a service unit. For example, a service unit may not be deployed in the guard module of a service terminal. Contact unit 111 is used for transmission of contact channels, and service unit 112 is used for transmission of bearer channels. The guard network is composed of contact channels and bearer channels. The contact channel is used to transmit information such as network coordinated frequency switching, topology maintenance, forwarding strategy negotiation, and air interface resource coordination, and can also be used for guaranteed communication. The bearer channel is used to deliver service content. Under the control of the contact unit, the service unit enables broadband communication between guard modules. Both the contact unit and the service unit can perform air interface spectrum situational awareness during communication intervals or during communication reception, and summarize and report the perception results to the contact unit and the intelligent control unit. The contact units of different guard modules can achieve time synchronization between guard modules through the contact channel.

[0040] In addition, the intelligent control unit 120 in the embodiment of the present invention can specifically obtain information such as the air interface spectrum status and the network load of the guard module itself through the inter-sensory component 110. When the guard module is applied to a service base station and / or a service terminal, it obtains information such as the device status and service load of the service base station and / or service terminal through the control interface, and shares and exchanges the spectrum status, network load, and device status between guard modules through the communication channel, forming a collaborative network-level frequency utilization strategy. Based on this frequency utilization strategy, a specific service network frequency change time and the specific frequency used are generated, and the frequency is disseminated to the intelligent control units of other modules through the communication channel, so as to collaboratively control the dynamic and synchronous switching of frequencies of different base stations and terminals, thereby achieving real-time changes in the service network air interface frequency and avoiding interference.

[0041] In an embodiment of the present invention, in order to reduce the probability of a service base station and / or service terminal being attacked, a simulated base station node and a simulated terminal node may be provided in the communication system. A simulated base station guard module may be provided in the simulated base station node, and a simulated terminal guard module may be provided in the simulated terminal node. Both the simulated base station guard module and the simulated terminal guard module may be implemented using the guard module described above. When implementing the functions of the simulated base station guard module and / or the simulated terminal guard module, the synaesthesia component may also generate air interface simulation signals for the service base station and / or service terminal to simulate the air interface behavior of the service base station and / or service terminal.

[0042] In an embodiment of the present invention, in order to realize the functions of simulating base station nodes and / or simulating terminal nodes, the intelligent control unit can also collaboratively control the dynamic synchronous switching frequency of the service base station and / or service terminal, can collaboratively control the simulated base station and / or simulated terminal, and can control the synesthesia component to generate simulated signals of the service base station and / or service terminal; wherein the simulated base station is used to simulate the air interface behavior of the service base station, and the simulated terminal is used to simulate the air interface behavior of the service terminal.

[0043] As another embodiment of the present invention, a service base station node 200 is provided, wherein: Figure 2 As shown, it includes a service base station 210 and a service base station guard module 220, the service base station guard module 220 is connected to the service base station 210 for communication, and the service base station guard module 220 includes the guard module described above, The service base station guard module 220 can provide the service base station with a timing signal for synchronization timing, and can send a coordinated frequency switching control instruction to the service base station to control air interface frequency switching; The service base station 210 can provide wireless access services and can send service data between service base stations to the service base station guard module, so that the service base station guard module relays and forwards the service data between the service base stations.

[0044] Specifically, the service base station node 200 is composed of a service base station 210 and a service base station guard module 220. The service base station guard module 220 provides timing for the service base station 210 through the timing interface; the service base station 210 receives the coordinated frequency switching control instruction of the service base station guard module 220 through the control interface, and performs coordinated switching of the cell air interface frequency to avoid interference.

[0045] When the service base station 210 needs to conduct inter-base station service interaction, the service content can be sent to the service base station guard module 220 through the collaborative port, and relayed by the service base station guard module 220. When the service content reaches the destination service base station guard module 220, the service base station guard module 220 will transfer the service content to the corresponding service base station 210 through the service interface.

[0046] In an embodiment of the present invention, the service base station guard module 220 can provide the service base station with a timing signal for synchronization timing through a timing interface, including: When it is determined that the service base station guard module has a valid external synchronization source, the local clock of the service base station guard module follows the external synchronization source, and its own clock source type is set to the external synchronization source, and its own clock information is published through the guard network; When it is determined that there is no valid external synchronization source for the service base station guard module, the target clock source and target tracking source are determined in turn. Determining the target clock source includes: a) The service base station guard module initially uses the local clock as the reference, sets its own clock source type to self-synchronization, and publishes its own clock information through the guard network; b) When the service base station guard module receives clock information issued by other service base station guard modules in the guard network, it determines the target clock source according to a preset clock source priority principle, wherein the preset clock source priority principle includes at least: a clock source type principle, a start time principle, and a first node ID principle. The clock source type principle is to give priority to selecting the clock of the service base station guard module with a higher clock source level as the target clock source; the start time principle is to give priority to selecting the clock of the service base station guard module with a longer start time as the target clock source; and the first node ID principle is to give priority to selecting the clock of the service base station guard module with a smaller or larger ID as the target clock source; Determining the target tracking source includes: The service base station guard module determines whether its own clock source is the target clock source; If the own clock source is the target clock source, the target tracking source is determined to be the service base station guard module itself; If the own clock source is not the target clock source, the target tracking source is determined according to the preset priority principle of the tracking source, wherein the preset priority principle of the tracking source includes at least the hop number principle and the second node ID principle. The hop number principle is to give priority to selecting a one-hop neighbor service base station guard module with the least network hops to reach the service base station guard module where the target clock source is located as the target tracking source. The second node ID principle is to give priority to selecting a one-hop neighbor service base station guard module with a small or large ID that can reach the service base station guard module where the target clock source is located as the target tracking source. After the target clock source and / or target tracking source is determined, the service base station guard module maintains time synchronization with the target clock source and / or target tracking source via the guard network, and transmits synchronization information via the guard network.

[0047] It should be noted that, with respect to the above-mentioned clock source type principle, it gives priority to tracking the service base station guard module with a high clock source level, and external synchronization takes precedence over self-synchronization; with respect to the above-mentioned startup time principle, it gives priority to tracking the service base station guard module with a long startup time, that is, the service base station guard module started first takes precedence over the service base station guard module started later; the above-mentioned node ID principle gives priority to tracking the service base station guard module with a small ID or a large ID, that is, all IDs are sorted in order from large to small or from small to large, and selected in order from small to large in one direction, or selected in order from large to small.

[0048] In addition, the clock information released by the service base station guard module through the guard network may specifically include the information release source ID (its own ID), the clock source type, the service base station guard module ID where the clock source is located, and the number of network hops to the service base station guard module where the clock source is located.

[0049] After the service base station guard module selects the clock source and tracking source, it sets the local clock to the tracking source as the benchmark, sets its own clock source type to the selected clock source type, and publishes its own clock information (including: information publishing source ID (its own ID), clock source type (selected clock source type), service base station guard module ID where the clock source is located (selected service base station guard module ID where the clock source is located), and network hop count to the service base station guard module where the clock source is located (the network hop count to the service base station guard module where the clock source is located published by the selected tracking source + 1)) through the guard network.

[0050] It should also be noted that the service base station guard module can only track external synchronization sources or other base station guard modules, and cannot track the service terminal guard module; the tracking source of the service terminal guard module can only be the service base station guard module to which it belongs.

[0051] It should be understood that setting up a service unit on the service base station guard module can provide a broadband transmission path for service data interaction between base stations.

[0052] The specific working process of the service base station node is described in detail below.

[0053] 1) After the service base station node is powered on, the service base station guard module first determines the target clock source and target tracking source: a) If there is a valid external synchronization source (for example, a valid BeiDou signal is detected), the clock of the service base station guard module will follow the external synchronization source, set its own clock as the target clock source, and publish it externally through the guard network; b) If there is no valid external synchronization source, the service base station guard module initializes and sets its own clock source type to self-synchronization, and publishes its own clock information through the guard network; b1) When the service base station guard module receives clock information from other service base station guard modules in the guard network, it determines the target clock source based on the following top-down priority: i) Select nodes with higher clock source levels for tracking: external synchronization takes precedence over self-synchronization; ii) If the selected clock source is not unique, the target clock source with the longest time on the network is selected for tracking; iii) If the selection is still not unique, the target clock source with the smallest or largest node ID is selected for tracking based on the node ID of the service base station guard module; b2) After determining the target clock source, the service base station guard module also needs to select the target tracking source according to the following principles: i) The tracking source must be the service base station guard module; ii) The target clock source is prioritized as the tracing source; iii) The node and the tracking source must be bidirectionally reachable; iv) The number of network hops from the trace source to the clock source is small; v) The node ID of the tracking source is the smallest or largest among the one-hop neighbors; c) After the service base station guard module selects the target clock source and target tracking source, it will maintain time synchronization with the network clock through the guard network and pass the synchronization information backward through the guard network.

[0054] 2) After determining the target clock source or target tracking source, the service base station guard module can independently build a guard network. The guard network can be specifically composed of a communication channel and a bearer channel. Synchronous diffusion information is transmitted in the communication channel. The service base station guard modules between adjacent nodes negotiate through the communication channel to establish a bearer channel on demand for the transmission of service content between base stations.

[0055] 3) After the guard network is built, the service base station guard module starts to perceive the air interface spectrum situation, bearer channel status, bearer service traffic, congestion level, etc., and spreads the perception results among adjacent base stations through the guard network.

[0056] 4) Based on the guard network, the service base station guard module receives information such as the air interface spectrum situation of the service terminal node reported by the service terminal guard module through the guard network (communication channel).

[0057] 5) The service base station guard module calculates the coordinated frequency usage results (cell air interface frequency) of the service base stations and the time-frequency resources and forwarding strategies of the bearer channels between base stations based on the information collected from its own and adjacent service base station guard modules and the perception results of the service terminal guard module.

[0058] 6) The service base station guard module distributes the coordinated frequency usage results of the service base station to the service base station through the control interface, triggering the service base station to update the cell air interface frequency (the protocol stack frequency of the communication system is not changed here).

[0059] 7) The protocol stack of the service base station runs according to the standard protocol process, and the air interface frequency of the service base station is used for air interface transmission and reception according to the frequency configured by the service base station guard module.

[0060] 8) The service base station guard module sends the coordinated frequency usage results of the service base station to the service terminal guard module through the communication channel, and the service terminal guard module triggers the service terminal to update the air interface frequency (the protocol stack frequency of the service terminal is not changed here).

[0061] 9) The air interface frequencies of the service base station and the service terminal are coordinated through the communication channel to achieve synchronous switching; the protocol stacks of the service base station and the service terminal comply with the standard protocol process.

[0062] 10) The service base station guard module periodically broadcasts the air interface frequency of the current service base station on the communication channel, which is used to synchronize the air interface frequency of the service terminal after it is powered on or connected to the service base station (after the service terminal guard module receives the air interface frequency of the current service base station sent by the service base station guard module, it directly notifies the service terminal of the frequency to update the air interface frequency, and the service terminal accesses the service network according to the standard protocol network access process).

[0063] The specific process of setting up a service unit for the service base station guard module to realize service transmission between base stations may include: 1) The guard modules of adjacent service base stations can exchange information such as the adjacency relationship (topology relationship) between base stations, the available spectrum situation of the bearer channel, the channel quality, the service requirements for transmission between base stations, the congestion status of the service base station guard modules, and the equipment capabilities through the communication channel; 2) The service base station guard module calculates the forwarding path of service messages between base stations based on the above information collected by itself and other service base station guard modules, and saves the calculation results as a forwarding table; 3) The service base station guard module negotiates the time and frequency resources of the bearer channel used to carry service messages between base stations based on the above information collected from itself and other service base station guard modules; 4) When the service base station guard module receives an inter-base station service message from a service base station, it first searches its own forwarding table to determine the next-hop service base station guard module, then forwards the service message to the corresponding service unit and sends it over the air interface using the negotiated time-frequency resources; 5) The receiving end makes a forwarding decision based on the destination address of the service message: if the destination address is the local service base station, the message is transferred to the service base station through the service interface for processing; otherwise, it continues to search the forwarding table to determine the next-hop service base station guard module, and then transfers the service message to the corresponding service unit, and uses the negotiated time-frequency resources for relay forwarding on the air interface.

[0064] Therefore, the service base station node provided in the embodiment of the present invention is provided with a service base station guard module for communication connection with the service base station. The service base station guard module is implemented using the guard module described above. Since the service base station guard module can build a guard network independent of the service network and realize functions such as air interface spectrum situation awareness based on the guard network, the service base station node of the present invention can also realize the interconnection of mobile broadband between base stations through the service unit in the service base station guard module, and at the same time negotiate the frequency utilization strategy between base stations through the communication unit, thereby effectively improving the reliability of the service network and making the wireless network have the ability to resist interference and attack.

[0065] As another embodiment of the present invention, a service terminal node 300 is provided, wherein Figure 3 As shown, it includes a service terminal 310 and a service terminal guard module 320, the service terminal guard module 320 is connected to the service terminal 310 for communication, and the service terminal guard module 320 includes the guard module mentioned above, The service terminal guard module 320 can send a coordinated frequency switching control instruction to the service terminal to control the air interface frequency switching; The service terminal 310 can access the service base station through a wireless access service and maintain synchronization with the service base station.

[0066] Specifically, the service terminal node 300 is composed of a service terminal 310 and a service terminal guard module 320. The service terminal 310 receives the coordinated frequency switching control instruction from the service terminal guard module 320 through the control interface, and controls the air interface frequency of the service terminal 310 without changing the protocol stack, thereby realizing the synchronous switching of the air interface frequency between the service terminal 310 and the service base station 210.

[0067] In an embodiment of the present invention, the synchronization of the service terminal follows the service base station, so there is no need for the service terminal guard module to provide time synchronization for the service terminal; the service terminal guard module provides a service interface for use by peripherals and applications deployed on the service terminal. When the peripherals and applications deployed on the service terminal find that the communication provided by the service terminal is interrupted, they can independently decide whether to switch to the guard network for service transmission.

[0068] In the embodiment of the present invention, the communication component in the service terminal guard module 320 includes a communication unit, and the service terminal guard module is connected to the guard network through the communication unit.

[0069] It should be understood that due to constraints on cost, weight, power consumption, and size of service terminal nodes, the intersensory components of the service terminal guard module may not include a service unit. Specifically, the module will interconnect with other service terminal guard modules and service base station guard modules solely through a liaison unit to achieve functions such as coordinated control, coverage extension, and blind spot filling. In this scenario, the service unit is only used for broadband intercommunication between base stations; interconnection between the service base station guard module and the service terminal guard module is accomplished by the liaison unit.

[0070] The specific working process of the service terminal node is described in detail below.

[0071] 1) After the service terminal node is powered on, the service terminal guard module first listens to the service base station air interface frequency information and time synchronization information sent by the adjacent service base station guard module; 2) The service terminal guard module selects the service base station guard module with good signal quality for time synchronization; the service terminal guard module establishes an air interface time synchronization relationship with the service base station guard module through the guard network (communication channel); 3) The service terminal guard module receives the service base station air interface frequency information from the service base station guard module and sends the information to the service terminal, triggering the service terminal to switch the air interface frequency to maintain consistency with the service base station air interface frequency; 4) The service terminal searches for and accesses a cell according to the standard protocol process. It should be understood here that only the air interface frequency is controlled by the service terminal guard module; 5) The service terminal and the service base station maintain air interface synchronization, and no service terminal guard module is required for timing; 6) The behavior of the service terminal after accessing the cell also complies with the standard protocol process, but the air interface frequency is controlled by the service terminal guard module; 7) Service base stations and service terminals coordinate frequency switching under the control of the service base station guard module and the service terminal guard module to achieve network-level interference avoidance, thereby enhancing the reliability of the wireless network.

[0072] It should be understood that after the service terminal node works normally, it can start air interface spectrum situation awareness and notify the service base station guard module of the perception result for coordinated frequency switching.

[0073] In summary, the service terminal node provided in the embodiment of the present invention is provided with a service terminal guard module for communication connection with the service terminal. The service terminal guard module is implemented using the guard module described above. Through the service terminal guard module, collaborative control with the service base station guard module can be achieved, thereby achieving collaborative switching frequency, and then achieving interference avoidance, thereby effectively improving the reliability of the service network and enabling the wireless network to have the ability to resist interference and attack.

[0074] As another embodiment of the present invention, a communication system is provided, characterized in that it includes the service base station node mentioned above and the service terminal node mentioned above, and the service base station node and the service terminal node are communicatively connected; The service base station and the service terminal can form a service network; The service base station guard module and the service terminal guard module can form a guard network, and the service base station guard module and the service terminal guard module can share the air interface spectrum situation changes they perceive through the guard network to assist in realizing the air interface frequency switching of the service base station and the service terminal.

[0075] The communication system in the embodiment of the present invention can effectively improve the reliability of the service network by adopting the service base station node and service terminal node mentioned above, so that the wireless network has the ability to resist interference and attack.

[0076] In an embodiment of the present invention, in order to reduce the probability of a service base station node and a service terminal node being attacked, the communication system further includes: Simulate base station nodes and simulate terminal nodes, The simulated base station node includes a simulated base station and a simulated base station guard module, and the simulated base station guard module includes the guard module described above. The simulated base station is used to simulate the air interface behavior of the service base station, and the simulated base station guard module is used to connect to the guard network and control the simulated behavior of the simulated base station; The simulated terminal node includes a simulated terminal and a simulated terminal guard module, wherein the simulated terminal guard module includes the guard module described above. The simulation terminal is used to simulate the air interface behavior of the service terminal, and the simulation terminal guard module is used to connect to the guard network and control the simulation behavior of the simulation terminal.

[0077] Specifically, the simulated base station / terminal node in the embodiment of the present invention is composed of a simulated base station / terminal and a simulated base station / terminal guard module, wherein the simulated base station / terminal is mainly used to simulate the air interface behavior of the service base station / terminal, reducing the probability of the service base station / terminal being interfered with or attacked. The intelligent control unit of the simulated base station / terminal guard module controls the behavior of the simulated base station / terminal through a control interface, including but not limited to the signal sending style, sending time, duration and even sending waveform, and controls the simulated base station / terminal to send a specific service simulation signal at a specific time of the air interface. Figure 4 As shown, it is a structural block diagram of a simulated base station node and a simulated terminal node.

[0078] It should be understood that the timing of the simulated base station / terminal comes from the guard module.

[0079] In addition, from the perspective of cost reduction, the analog base station / terminal can also be replaced by the synaesthesia component. In this case, in addition to completing the communication function itself, the synaesthesia component also supports the generation of analog signals of the service base station / terminal on demand under the control of the intelligent control unit, and sends them at the specified time, specified frequency and appropriate power through the service unit. Figure 5 shown.

[0080] Specifically, the working process of simulating a base station node and simulating a terminal node includes: 1) After the simulated base station node is powered on, if there is an external synchronization source, it will maintain synchronization with the external synchronization source; otherwise, it will maintain air interface time synchronization with the guard module corresponding to the service base station to be protected; 2) After the analog terminal node is powered on, if there is an external synchronization source, it will maintain synchronization with the external synchronization source; otherwise, it will maintain air interface time synchronization with the guard module corresponding to the service terminal to be protected or the service base station guard module tracked by the guard module (the service base station guard module takes priority); 3) After the simulated base station / terminal guard module completes air interface synchronization, it will register with the guard module of the corresponding service base station / terminal to be protected, and report its own identification and capability information for reference by the service base station / terminal guard module; 4) After successful registration, the simulated base station / terminal guard module waits to receive control instructions from the guard module of the corresponding service base station / terminal to be protected, thereby simulating the air interface behavior of the service base station / terminal.

[0081] In an embodiment of the present invention, for a TDD network, the same simulated base station / terminal node can "simultaneously" simulate the air interface behavior of a service base station and a service terminal: if the simulated base station / terminal node has an external synchronization source, it will maintain synchronization with the external synchronization source; otherwise, it will only maintain air interface time synchronization with the guard module corresponding to the service base station to be protected; the simulated base station / terminal node will follow the same steps 3) and 4) in the simulated base station node and the simulated terminal node, and simultaneously interact with the guard module of the corresponding service base station / terminal to be protected; the simulated base station / terminal node simulates the air interface behavior of the service base station in the downlink time slot and simulates the air interface behavior of the service terminal in the uplink time slot.

[0082] In the embodiment of the present invention, Figure 6 The communication system network shown in the figure includes service base station nodes (assuming the core network function is integrated), service terminal nodes, simulated base station nodes, simulated terminal nodes and guard nodes. For the convenience of description, each node is numbered uniformly, and the guard modules under each node and the service base stations, service terminals, simulated base stations, and simulated terminals are numbered the same as the nodes.

[0083] The coverage of service base station 7 and service base station 8 is as follows: Figure 6As shown, the service base station and service terminals form a service network, and the guard modules are interconnected to form a guard network. For example, service base station 7 and service terminals 1, 10, 11, and 15, and service base station 8 and service terminals 2, 13, 14, and 16, respectively, form two service networks. The guard modules in the network establish a unified collaborative control network through communication channels. This network enables other guard modules to maintain time synchronization with service base station guard modules 7 and 8. This network also provides a transmission channel for information such as network collaborative frequency switching, topology maintenance, forwarding policy negotiation, and air interface resource coordination. Furthermore, this network can serve as a backup connection for service terminal nodes.

[0084] When cross-base station service information is to be transmitted between the service base station guard module 7 and the service base station guard module 8, the bearer channel capability, resources, forwarding strategy, etc. can be coordinated through contact information first, and then the broadband service information is transmitted on the bearer channel based on the coordination results.

[0085] Simulation base stations 3, 4, and 5 are deployed around service base stations 7 and 8, and simulate the air interface signals of service base stations 7 and 8 by cooperating with the service base station guard module to reduce the probability of service base stations 7 and 8 being subjected to physical attacks.

[0086] The following describes in detail a specific process of implementing coordinated frequency switching between a service base station node and a service terminal node in a communication system to enhance the anti-interference capability of the communication system.

[0087] 1) The service base station protection module conducts real-time situational awareness of the available air interface spectrum of the service base station, identifying interference and available spectrum resources; 2) The service base station guard module shares the air interface frequency and air interface spectrum situation (available frequency, available bandwidth, interference location, etc.) it is using with the guard modules of adjacent service base stations; 3) The service base station guard module selects an available frequency with a lower load as the air interface frequency based on the collected information such as the air interface frequency and air interface spectrum situation of itself and the adjacent service base station guard modules; 4) The service base station guard module notifies the service base station to perform air interface frequency switching; the service base station guard module notifies the guard module of the service terminal node connected to the service base station through the communication channel to perform coordinated frequency switching; 5) The service terminal protection module notifies the service terminal of this information so that the service base station and the service terminal can perform frequency switching at the same time to ensure service continuity; 6) The service terminal guard module can also conduct real-time situational awareness of the available air interface spectrum of the service terminal, identify interference and available spectrum resources; the service terminal guard module reports the air interface perception results to the corresponding service base station guard module through the communication channel for reference when performing air interface frequency switching.

[0088] In this embodiment of the present invention, the service base station protection module and the service terminal protection module collaborate to determine the specific air interface target frequency of the service network and the specific switching timing. The switching timing can be selected from the following moments from the perspective of the service base station to minimize the impact on air interface transmission services. Specifically, the switching timing can be selected at the following moments: 1) Radio frame boundary; 2) Radio subframe boundary; 3) Time slot boundary; 4) Guard band for receiving and forwarding; 5) Send and receive protection belt; 6) Take effect immediately.

[0089] When the service base station guard module issues a frequency cutting control instruction, it needs to reserve time for the service base station and service terminal to generate instructions, transmit instructions, process instructions, prepare for frequency cutting, stabilize frequency, and perform protection intervals. The frequency switching timing can be selected as the first optional moment after the reserved time.

[0090] After receiving the frequency switching control instructions from their respective guard modules, the service base station and service terminal can prepare for frequency switching in advance. When the frequency switching opportunity arrives, they can synchronously switch the air interface frequency to ensure service continuity.

[0091] In an embodiment of the present invention, in order to achieve protection for service base stations and service terminals, this can be achieved by setting up simulated base station nodes and simulated terminal nodes. Specifically, when simulated base station nodes or simulated terminal nodes are deployed in the network, the simulated base station guard module and the simulated terminal guard module will cooperate with the adjacent service base station guard module and service terminal guard module and accept the control of these service base station guard modules and service terminal guard modules. Specifically, the specific process of the simulated base station guard module and the simulated terminal guard module coordinating with the adjacent service base station guard module and service terminal guard module includes: 1) The simulated base station guard module and the simulated terminal guard module perceive the air interface spectrum situation in real time, identifying interference and available spectrum resources; 2) The simulated base station guard module and the simulated terminal guard module share their own air interface spectrum situation perception results with the adjacent service base station guard module or service terminal guard module through the guard network; 3) The service base station guard module, based on the collected air interface spectrum patterns of itself, adjacent simulated base station guard modules, and adjacent service base station guard modules, controls adjacent simulated base station nodes to transmit service base station simulated signals, thereby reducing the probability of service base stations being attacked. Information such as the frequency, duration, content, and format of the simulated base station air interface transmitted signals can be controlled and sent to the simulated base station guard module under the control of the service base station guard module. If the simulated base station function is performed by the simulated base station guard module's interoceptive component, the simulated base station guard module controls its own interoceptive component to simulate the aforementioned air interface service base station transmission signals. Otherwise, if the simulated base station function is performed by an independent simulated base station device, the simulated base station guard module controls the simulated base station to transmit specific air interface signals at a given frequency, at a given activation time, and for a given duration.

[0092] 4) The service terminal guard module, based on the collected air interface spectrum patterns of itself, adjacent simulated terminal guard modules, and adjacent service terminal guard modules, controls adjacent simulated terminal nodes to transmit service terminal simulation signals, thereby reducing the probability of service terminals being attacked. Information such as the frequency, duration, content, and format of the simulated terminal air interface transmission signals can be controlled and sent to the simulated terminal guard module under the control of the service terminal guard module. If the simulated terminal function is performed by the simulated terminal guard module's synaesthesia component, the simulated terminal guard module controls its own synaesthesia component to simulate the air interface service terminal transmission signals described above. Otherwise, if the simulated terminal function is performed by an independent simulated terminal device, the simulated terminal guard module controls the simulated terminal to transmit specific air interface signals at a given frequency, at a given activation time, and for a given duration.

[0093] 5) The sending time and frequency resources of the simulation base station and simulation terminal do not conflict with the time and frequency resources being used by the service base station and service terminal air interface, so as to prevent interference with the service network.

[0094] It should be noted that in the embodiment of the present invention, the analog base station and the analog terminal can record a valid signal of the service base station or the service terminal in advance and save it locally, and then play it when receiving instructions from the service base station guard module and the service terminal guard module.

[0095] For TDD networks, the same simulated base station / terminal node can "simultaneously" simulate the air interface behavior of the service base station and the service terminal: the simulated base station / terminal node simulates the air interface behavior of the service base station in the downlink timeslot and simulates the air interface behavior of the service terminal in the uplink timeslot.

[0096] In an embodiment of the present invention, the guard network in the communication system can adopt a multi-channel self-organizing network structure, consisting of a communication channel and a bearer channel. The communication channel is used for multi-hop, self-organizing, and self-relay interconnection between service base station guard modules, between service base station guard modules and service terminal guard modules, and between service terminal guard modules. The communication channel is mainly used for information transmission such as coordinated frequency switching of the service network, topology maintenance between base stations required for bearer channels, forwarding strategy negotiation, and air interface resource coordination. When a service terminal node moves outside the coverage area of ​​the service base station, the service network communication of the service terminal is interrupted. At this time, the service terminal node can leverage the multi-hop self-organizing and self-relaying characteristics of the communication channel and rely on other service terminal guard modules to build a communication network beyond the coverage area of ​​the service base station. This network transmits through the service network within the coverage area of ​​the service base station, and transmits services through the communication channel of the guard network outside the coverage area of ​​the service base station. The service terminal guard module and the service terminal are interconnected through the service interface.

[0097] In current communication systems, when the service network is interrupted, such as when a service base station fails or is attacked, if the guard network can still operate normally (the guard network adopts a multi-channel self-organizing network system with better reliability than the service network), each guard module in the network can provide a channel to other nodes to the peripherals through the service interface, thereby achieving guaranteed service connectivity.

[0098] In this embodiment of the present invention, when the service network operates in FDD mode, the frequencies used by the guard network (including communication channels and bearer channels) must be isolated from the uplink and downlink frequencies used by the service network to prevent mutual interference. This can be achieved by using filters to isolate the frequencies and ensuring that the guard network's frequencies are sufficiently distant from the service network. In this case, the guard network and the service network operate asynchronously at different frequencies, preventing interference.

[0099] When the service network is in TDD mode, the frequencies used by the guard network (including communication channels and bearer channels) are sufficiently far from the uplink and downlink frequencies used by the service network, and there is no mutual interference. A frequency division strategy can be adopted to achieve asynchronous operation at different frequencies without interfering with each other. Otherwise, the guard network is subject to the following constraints (operating synchronously with the service network at different frequencies): 1) The service base station guard module can only transmit in the downlink time slot of the service network, and other time slots can be used for receiving; 2) The service terminal guard module can only transmit in the uplink time slot of the service network, and other time slots can be used for receiving; 3) The service base station guard module can only transmit and receive between base stations during the downlink-to-uplink protection interval; or a dedicated time domain resource is allocated in the service network for the service base station guard module to transmit and receive between base stations, and no uplink or downlink service scheduling is performed during this dedicated time domain resource; The communication channel and the bearer channel are considered independently. For example, the communication channel and the service network work synchronously at different frequencies to avoid interference, and the bearer channel and the service network work asynchronously and independently at different frequencies without interfering with each other.

[0100] In an embodiment of the present invention, the frequency coordinated switching of the service network to combat interference can be controlled by a guard network. The guard network is composed of a communication channel and a bearer channel. When the bearer channel encounters interference, the communication channel can negotiate to switch to an interference-free frequency for transmission. Since the communication channel transmits a relatively small amount of information, it can use narrowband and more mature strategies to combat interference, such as spread spectrum, frequency hopping, time hopping and other methods.

[0101] The communication system in the embodiment of the present invention significantly enhances the anti-interference capability of the entire service network by improving the anti-interference level of the communication channel.

[0102] The following uses a 5G service network and a multi-channel ad hoc network as an example to illustrate how the guard network improves the anti-interference capability of the 5G network.

[0103] (1) Single-base-station single-sector network like Figure 7 As shown in the figure, in a 5G single-base station single-sector deployment network, a cell is deployed on service base station 1 (base station coverage is the same as cell coverage and is no longer distinguished in the description). The service base station guard module antenna of service base station node 1 is an omnidirectional antenna. The service base station guard module of service base station node 1 will serve as the synchronization benchmark of the guard network. Other service terminal guard modules, simulated base station guard modules, simulated terminal guard modules, and independent guard modules all maintain time synchronization with the service base station guard module through the guard network.

[0104] Due to single-site deployment, there is no inter-base station service collaboration. Therefore, the interawareness component of the guard module of the service base station node 1 can only be deployed with a contact unit. When the guard module of the service base station node 1 is connected to an external synchronization device (such as Beidou / GPS), the service base station guard module receives the external synchronization signal and uses the external synchronization signal as the time reference to maintain synchronization with it. When the service base station guard module is not connected to the external synchronization device or does not receive the external synchronization signal, its own clock is used as the time synchronization reference.

[0105] like Figure 8 As shown, the clock unit of the service base station guard module simulates and generates Beidou timing signals through the timing interface and provides them to the 5G base station through the timing interface. This allows the 5G base station and the service base station guard module to maintain time synchronization. The service base station guard module connects to the 5G base station through the control interface and can perform actions such as frequency switching control, status query, and parameter modification on the 5G base station. The service base station guard module is interconnected with the 5G base station through the service interface, supporting guaranteed communication through the communication channel in the event of service terminal failure or interference.

[0106] The operating frequency of the guard network (communication channel) must avoid the air interface frequency of the 5G service network to prevent mutual interference between the frequencies of the systems.

[0107] like Figures 9 to 11 The following diagrams illustrate the structure of a service terminal node, a simulated base station node, and a simulated terminal guard module in a 5G network. The service terminal guard module, simulated base station guard module, simulated terminal guard module, independent guard module, and service base station guard module autonomously establish a distributed self-organizing network through communication channels. The service terminal guard module, simulated base station guard module, simulated terminal guard module, and independent guard module maintain time synchronization with the service base station guard module through this self-organizing network. Furthermore, the guard modules can also synchronize with external clock sources (such as BeiDou) through external synchronization interfaces.

[0108] The simulated base station node requires high power output, so an external simulated base station device is used; the simulated terminal node adopts an integrated design to reduce costs, and the business unit simulates the terminal behavior.

[0109] The service base station guard module, service terminal guard module, simulated base station guard module, simulated terminal guard module, and independent guard module all sense their own air interface spectrum status in real time (for example, spectrum noise floor information with a 1MHz granularity, including mean, maximum, number of times the noise floor exceeds the mean, number of noise floor detections, etc.), and aggregate their sensed spectrum status to the service base station guard module through the guard network. The service base station guard module makes a decision based on its own spectrum status and the spectrum status collected by the service terminal guard module: 1) The current 5G network has no interference (the noise floor of the air interface frequency band is normal, for example, it is less than the threshold or the noise floor is less than the threshold for more than a certain percentage of the frequency): the current 5G network air interface frequency is maintained; 2) If the current 5G network is interfered with (the noise floor of the air interface frequency is too high, for example, more than a certain percentage of the frequency band noise floor is greater than the threshold) and there are other suitable non-interference frequencies available, the suitable non-interference frequency F1 is selected and a coordinated frequency handover process is initiated through the guard network; 3) If the current 5G network is experiencing interference and no other interference-free frequencies are available, but a more suitable frequency is available (with a lower noise floor than the current air interface frequency, for example, a noise floor difference of at least 5dB and noise floors in more than 50% of the frequency bands exceeding the noise floor of the current air interface frequency). The more suitable interference-free frequency F1 is selected, and a coordinated frequency handover process is initiated through the guard network. 4) The current 5G network is interfering but there is no other more suitable frequency: Maintain the current 5G network air interface frequency.

[0110] When the service base station guard module determines to initiate a coordinated frequency handover, it executes according to the following strategy: 1) Determine the earliest effective time point of the frequency based on the current time and the configured frequency switching preparation protection interval; 2) Search backward based on the earliest effective time point of the frequency; a. 5G TDD base station: Find the time domain location of the first transmission, reception, and record this time domain location as T1. b. 5G FDD base station: Find the first radio time slot boundary and record the time domain location as T1; 3) Generate the signal transmission pattern parameters, usage frequency, effective time, and duration of simulated base station nodes 1 and 2 based on F1 and T1; and simultaneously generate the signal transmission pattern parameters, usage frequency, effective time, and duration of simulated terminal node 1; 4) The service base station guard module constructs a coordinated frequency switching notification message, which carries at least the target frequency F1 and the effective time T1 of the service terminal node; 5) The service base station guard module sends the coordinated frequency switching notification message to the service base station through the control interface; the service base station guard module spreads the coordinated frequency switching notification message to each service terminal guard module through the guard network; 6) The service terminal guard module forwards the received coordinated frequency switching notification to the service terminal; 7) The service base station guard module constructs a simulated base station / terminal node notification message, which carries at least the ID of the simulated base station / terminal node and the signal transmission pattern parameters, frequency, effective time and duration of the corresponding node; 8) The service base station guard module spreads the constructed simulated base station / terminal node notification message to each simulated base station / terminal guard module through the guard network; 9) The simulated base station guard module forwards the received simulated base station node notification message to the simulated base station; 10) When time T1 arrives, the service base station and service terminal simultaneously switch the air interface frequency of the current 5G network to F1.

[0111] 11) When time T1 arrives, the simulated base station and the simulated terminal simultaneously send simulated signals on the designated frequency of the air interface to cover the service base station and service terminal until the duration is reached or an updated instruction is received.

[0112] Figure 7 In the simulation, base station node 2 accesses the guard network through guard node 1; service terminal node 5 is far away from the coverage area of ​​service base station 1, but it can extend the coverage of the base station through service base station nodes 2 / 3.

[0113] When service base station node 1 fails or is paralyzed due to other reasons, the guard network can become an independent network to achieve interconnection and interoperability of service terminal nodes 1 to 5.

[0114] (2) Multi-base station single sector network like Figure 12 As shown, in a 5G multi-base station single-sector deployment network, a cell is deployed on each of the service base station nodes 1 and 2 (base station coverage is the same as cell coverage and is no longer distinguished in the description). The coverage area is as follows: Figure 12 As shown, the antennas of the guard modules of service base station nodes 1 and 2 are omnidirectional. The guard module of service base station node 1 receives timing signals from BeiDou via an external synchronization interface. It is assumed that the guard module of service base station node 2 does not have an external synchronization signal. The guard modules of service base station node 1 and service base station node 2 each deploy a service unit 1 for bearer channel transmission.

[0115] The guard module of the service base station node 1 provides timing for the service base station through the timing interface. After the guard module of the service base station node 1 works normally, it periodically publishes the clock information it has collected, including: information publishing source ID (1), node type (service base station), ID of the service base station guard module where the clock source is located (1), target tracking source ID (1), clock source type (external synchronization), number of network hops to the service base station guard module where the clock source is located (0), and current time information.

[0116] After the guard module of the service base station node 2 detects the clock information sent by the guard module of the service base station node 1 through the contact information, it selects the guard module as the clock source for tracking and publishes the clock information collected by itself, including: information publishing source ID (2), node type (service base station), guard module ID of the service base station where the clock source is located (1), target tracking source (1), clock source type (external synchronization), network hop count to the guard module of the service base station where the clock source is located (1), and current time information.

[0117] The service terminal guard module selects the nearest service base station guard module for time synchronization tracking. When there is no service base station guard module within one hop range, it selects other service terminal guard modules or guard nodes with fewer hops from the service base station, higher clock level, better channel quality, fewer hops from the clock source, and smaller or larger IDs as clock sources for tracking. The service terminal guard module can publish the clock information it has collected, including: information publishing source ID (service terminal node ID), node type (service terminal), corresponding service base station node ID (1), network hop count to the corresponding service base station (actual tracking hop count to node 1), current time information, and corresponding cell ID.

[0118] The time tracking service of the guard module of simulated base station 3 is the guard module of base station 1; the time tracking service of the guard modules of simulated base stations 4 and 5 is the guard module of base station 2 (assuming that the simulated base station node 4 is configured to protect the service base station node 2).

[0119] The guard module of the simulated terminal node 15 tracks the guard module of the service terminal 9 , and the guard module of the simulated terminal node 17 tracks the guard module of the service terminal 11 .

[0120] After the service terminal guard module locks onto the tracking source and completes air interface time synchronization, it waits to receive a coordinated frequency switch notification message from the corresponding service base station guard module and forwards the received message to the service terminal. The service terminal switches the service network's air interface frequency to the specified frequency at the given effective time. The service terminal guard module may not forward the coordinated frequency switch notification message over the air interface. In other words, the coordinated frequency switch notification message is valid only within a single hop. This means that the air interface frequency of service terminals outside the service base station's coverage area may not be consistent with that of the service base station.

[0121] The guard module of service base station 1 is responsible for the coordination of all nodes within the coverage area of ​​service base station 1; the guard module of service base station 2 is responsible for the coordination of all nodes within the coverage area of ​​service base station 2; for service terminal nodes outside the coverage area of ​​the service base station, multi-hop self-relay interconnection with other service terminal nodes is achieved through communication channels to extend the coverage of the service network, such as service terminal nodes 14 and 16.

[0122] The guard module of service base station 1 and the guard module of service base station 2 can exchange their respective service base station node status information through the communication channel, including at least: service base station adjacency (neighbor relationship and learned node topology), available spectrum situation of the bearer channel (noise floor), channel quality (signal-to-noise ratio), service traffic demand transmitted between base stations, air interface transceiver load of the bearer channel, average service delay of the guard module, packet loss rate and equipment capabilities, etc.

[0123] The guard module of service base station 1 and the guard module of service base station 2 establish an inter-base station bearer channel. The frequency used by the bearer channel is negotiated through the communication channel. When encountering interference, the frequency is changed through the communication channel. The guard module of service base station 1 adds an entry to its forwarding table: destination address (address of service base station 2), next hop address (address of guard module of service base station 2), port (service unit 1); The guard module of service base station 2 adds an entry to its forwarding table: destination address (address of service base station 1), next hop address (address of guard module of service base station 1), port (service unit 1); Inter-base station services are forwarded over the air interface according to their respective forwarding tables.

[0124] (3) Multi-sector base station like Figure 13 As shown in the figure, a base station with three sectors is deployed, and each sector corresponds to a cell. There are two deployment methods for the telepathic component in the service base station guard module: 1) Deploy three synaesthesia components, each corresponding to a sector; In the embodiment of the present invention, the three synaesthesia components are required to maintain time synchronization, and their respective communication units meet TDD constraints on the air interface, that is, they are in the sending state or the receiving state at the same time; the business units of the three synaesthesia components are controlled and managed separately; apart from this, there are no other constraints on the use of the synaesthesia components.

[0125] The intelligent control unit maps the synaesthesia components to cells on a sector-by-sector basis. This means the intelligent control unit can bind cells and synaesthesia components into a single entity for independent control, instructing them to reuse the same physical interface. Therefore, they must be distinguished by cell ID and synaesthesia component ID. Intelligent control operates at the sector (cell) granularity.

[0126] 2) Deploy a synaesthesia component, each of which controls three sector antennas, corresponding to three sectors; At this time, the synaesthesia component is required to support a multi-channel self-organizing network protocol based on directional antennas. The cell ID needs to be bound to the antenna ID, and intelligent control is based on the sector (cell) granularity.

[0127] In summary, the communication system provided by the present invention can solve the anti-interference and anti-attack capabilities of commercial cellular networks represented by 5G under a unified architecture; through the introduction of service units, it provides a complete solution for mobile broadband interconnection between base stations under a multi-channel system.

[0128] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A guard module, characterized in that: include: A synaesthesia component is configured to interact with synaesthesia components of other guard modules within the same communication system to build a guard network independent of the service network, and to implement at least air interface spectrum situational awareness, coordinated frequency switching, and service data transmission between service base stations based on the guard network; An intelligent control unit, communicatively connected to the synaesthesia component, configured to obtain a network-level frequency utilization strategy based on the air interface spectrum situation and coordinated frequency switching information reported by the synaesthesia component and other guard modules, generate a service network frequency point change time and frequency point according to the network-level frequency utilization strategy, and diffuse the service network frequency point change time and frequency point to service base station nodes and / or service terminal nodes via the guard network; A clock unit is communicatively connected to the synaesthesia component and is used to provide a clock service for at least the synaesthesia component and the intelligent control unit.

2. The guard module according to claim 1, characterized in that: The synaesthesia component includes at least one contact unit and N business units, where N is a natural number greater than or equal to 0, and the business unit is communicatively connected to the contact unit. The contact unit is used to form a contact channel, and the service unit is used to form a bearer channel. The contact channel and the bearer channel together constitute the guard network. The communication channel can at least transmit coordinated frequency switching messages, network topology maintenance messages, forwarding strategy negotiation messages and air interface spectrum situation awareness information, and the bearer channel is used to transmit at least service data between service base stations.

3. The guard module according to claim 1 or 2, characterized in that: The synaesthesia component can also generate air interface simulation signals of the service base station and / or service terminal to achieve air interface behavior simulation of the service base station and / or service terminal.

4. The guard module according to claim 1 or 2, characterized in that: The intelligent control unit can also collaboratively control the dynamic synchronous switching frequency of the service base station and / or the service terminal, can collaboratively control the simulation base station and / or the simulation terminal, and can control the synesthesia component to generate simulation signals of the service base station and / or the service terminal; wherein the simulation base station is used to simulate the air interface behavior of the service base station, and the simulation terminal is used to simulate the air interface behavior of the service terminal.

5. A service base station node, characterized in that: It includes a service base station and a service base station guard module, the service base station guard module is communicatively connected to the service base station, and the service base station guard module includes the guard module according to any one of claims 1 to 4, The service base station guard module can provide the service base station with a timing signal for synchronization timing, and can send a coordinated frequency switching control instruction to the service base station to control air interface frequency switching; The service base station can provide wireless access services and can send service data between service base stations to the service base station guard module, so that the service base station guard module relays and forwards the service data between the service base stations.

6. The service base station node according to claim 5, characterized in that: The service base station guard module can provide the service base station with a timing signal for synchronization timing through a timing interface, including: When it is determined that the service base station guard module has a valid external synchronization source, the local clock of the service base station guard module follows the external synchronization source, and its own clock source type is set to the external synchronization source, and its own clock information is published through the guard network; When it is determined that there is no valid external synchronization source for the service base station guard module, the target clock source and target tracking source are determined in turn. Determining the target clock source includes: a) The service base station guard module initially uses the local clock as the reference, sets its own clock source type to self-synchronization, and publishes its own clock information through the guard network; b) When the service base station guard module receives clock information issued by other service base station guard modules in the guard network, it determines the target clock source according to a preset clock source priority principle, wherein the preset clock source priority principle includes at least: a clock source type principle, a start time principle, and a first node ID principle. The clock source type principle is to give priority to selecting the clock of the service base station guard module with a higher clock source level as the target clock source; the start time principle is to give priority to selecting the clock of the service base station guard module with a longer start time as the target clock source; and the first node ID principle is to give priority to selecting the clock of the service base station guard module with a smaller or larger ID as the target clock source; Determining the target tracking source includes: The service base station guard module determines whether its own clock source is the target clock source; If the own clock source is the target clock source, the target tracking source is determined to be the service base station guard module itself; If the own clock source is not the target clock source, the target tracking source is determined according to the preset priority principle of the tracking source, wherein the preset priority principle of the tracking source includes at least the hop number principle and the second node ID principle. The hop number principle is to give priority to selecting a one-hop neighbor service base station guard module with the least network hops to reach the service base station guard module where the target clock source is located as the target tracking source. The second node ID principle is to give priority to selecting a one-hop neighbor service base station guard module with a small or large ID that can reach the service base station guard module where the target clock source is located as the target tracking source. After the target clock source and / or target tracking source is determined, the service base station guard module maintains time synchronization with the target clock source and / or target tracking source via the guard network, and transmits synchronization information via the guard network.

7. A service terminal node, characterized in that: It includes a service terminal and a service terminal guard module, the service terminal guard module is in communication with the service terminal, and the service terminal guard module includes the guard module according to any one of claims 1 to 4, The service terminal guard module can send a coordinated frequency switching control instruction to the service terminal to control the air interface frequency switching; The service terminal can access the service base station through a wireless access service and keep synchronization with the service base station.

8. The service terminal node according to claim 7, characterized in that: The synaesthesia component in the service terminal guard module includes a contact unit, and the service terminal guard module is connected to the guard network through the contact unit.

9. A communication system, characterized in that: Comprising the service base station node according to claim 5 or 6 and the service terminal node according to claim 7 or 8, the service base station node and the service terminal node are communicatively connected; The service base station and the service terminal can form a service network; The service base station guard module and the service terminal guard module can form a guard network, and the service base station guard module and the service terminal guard module can share the air interface spectrum situation changes they perceive through the guard network to assist in realizing the air interface frequency switching of the service base station and the service terminal.

10. The communication system according to claim 9, wherein: Also includes: Simulate base station nodes and simulate terminal nodes, The simulated base station node includes a simulated base station and a simulated base station guard module, and the simulated base station guard module includes the guard module according to any one of claims 1 to 4. The simulated base station is used to simulate the air interface behavior of the service base station, and the simulated base station guard module is used to connect to the guard network and control the simulated behavior of the simulated base station; The simulated terminal node includes a simulated terminal and a simulated terminal guard module, and the simulated terminal guard module includes the guard module according to any one of claims 1 to 4. The simulation terminal is used to simulate the air interface behavior of the service terminal, and the simulation terminal guard module is used to connect to the guard network and control the simulation behavior of the simulation terminal.

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