Spectrum sensing method and device for cooperative frequency switching network, and communication system

Abstract

The invention relates to the technical field of wireless communication, and particularly discloses a spectrum sensing method and device for a cooperative frequency switching network and a communication system, and the method comprises the steps: generating a service network air interface frequency utilization situation table according to a network-level cooperative frequency control instruction transmitted by a guard network; a frequency spectrum sensing control instruction is generated according to the service network air interface frequency use situation table, the frequency spectrum sensing control instruction is diffused through a guard network, and the service terminal guard module can sense and monitor a service network air interface according to the frequency spectrum sensing control instruction and a to-be-sensed frequency set; and sensing and monitoring a service network air interface according to the to-be-sensed frequency set. The spectrum sensing method of the cooperative frequency switching network provided by the invention can assist in improving the anti-interference capability of the cellular network.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a spectrum sensing method for a coordinated frequency switching network, a spectrum sensing device for a coordinated frequency switching network for a service base station node, a spectrum sensing device for a coordinated frequency switching network for a service terminal node, and a communication system. Background Art

[0002] Commercial cellular network technology represented by 5G, with its many excellent features such as large bandwidth, low latency, and ultra-large-scale networking, has significantly changed people's lifestyles and promoted the rapid progress of society. Commercial cellular networks all operate at specific operating frequencies, which are not allowed to be used by other wireless devices to prevent interference with communications. When cellular networks are applied to special fields, due to the lack of anti-interference capabilities of cellular networks, when encountering interference, it may cause communication degradation or even business interruption. In order to improve the anti-interference capability, it is first necessary to be able to perceive the situation of the air interface spectrum. There is no solution for how to perceive the situation of the cellular network air interface spectrum in the existing technology.

[0003] Therefore, how to realize the perception and identification of the air interface spectrum of the cellular network 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 spectrum sensing method for a coordinated frequency switching network, a spectrum sensing device for a coordinated frequency switching network for a service base station node, a spectrum sensing device for a coordinated frequency switching network for a service terminal node, and a communication system, to solve the problem of lack of sensing and identification of the air interface spectrum of a cellular network existing in the related art.

[0005] As a first aspect of the present invention, a spectrum sensing method for a coordinated frequency switching network is provided, wherein the method is applied to a service base station node, the service base station node includes a service base station and a service base station guard module that is communicatively connected to the service base station, the service base station can be communicatively connected to a service terminal in a service terminal node and form a service network, and the service base station guard module can be communicatively connected to a service terminal guard module in the service terminal node and form a guard network; the spectrum sensing method for the coordinated frequency switching network includes:

[0006] Generate a service network air interface frequency usage status table according to the network-level coordinated frequency control instruction transmitted by the escort network, wherein the service network air interface frequency usage status table can determine a frequency set to be sensed, and the frequency set to be sensed at least includes the frequency point currently used by the service network air interface;

[0007] Generate spectrum sensing control instructions according to the frequency usage situation table of the air interface of the service network, and spread the spectrum sensing control instructions through the escort network. The service terminal escort module can sense and monitor the air interface of the service network according to the spectrum sensing control instructions and the set of frequencies to be sensed;

[0008] Sense and monitor the air interface of the service network according to the set of frequencies to be sensed.

[0009] Further, sensing and monitoring the air interface of the service network according to the set of frequencies to be sensed includes:

[0010] Switch the frequency points currently used by the air interface of the service network to migration frequency points, where the migration frequency points are different from the frequency points in the set of frequencies to be sensed;

[0011] Control the air interface of the service network to maintain at the migration frequency point for a first preset time, and switch the air interface of the service network back to the frequency points used before the first preset time when the first preset time ends;

[0012] Sense and monitor the frequency points in the set of frequencies to be sensed within the first preset time, and obtain the sensing and monitoring results.

[0013] Further, the set of frequencies to be sensed further includes frequency points that are not currently used by the air interface of its own service network within a preset number of hops, and the sensing priority of the frequency points currently used by the air interface of its own service network is higher than that of the frequency points currently used by the air interface of non-own service networks.

[0014] Further, the spectrum sensing method of the collaborative frequency switching network further includes:

[0015] Spread network-level collaborative frequency control instructions through the escort network within at least 1 hop range;

[0016] When network-level collaborative frequency control instructions within a preset number of hops can be received through the escort network, spread the current network-level collaborative frequency control instructions within the preset number of hops.

[0017] As another aspect of the present invention, there is provided a spectrum sensing method for a collaborative frequency switching network, where it is applied to a service terminal node. The service terminal node includes a service terminal and a service terminal escort module communicatively connected to the service terminal. The service terminal can be communicatively connected to a service base station in a service base station node to form a service network, and the service terminal escort module can be communicatively connected to a service base station escort module in a service base station node to form an escort network; the spectrum sensing method of the collaborative frequency switching network includes:

[0018] Receive the spectrum sensing control instruction sent by the service base station guard module, where the service base station guard module can generate a service network air interface frequency usage situation table according to the network-level collaborative frequency control instruction transmitted in the guarded network, and the service network air interface frequency usage situation table is used to determine the set of frequencies to be sensed, and the set of frequencies to be sensed includes at least the frequency points currently used by the air interface of its own service network;

[0019] Sense and monitor the service network air interface according to the spectrum sensing control instruction and the set of frequencies to be sensed, and obtain the sensing and monitoring result;

[0020] Report the sensing and monitoring result to the service base station guard module through the guarded network.

[0021] Further, sensing and monitoring the service network air interface according to the spectrum sensing control instruction and the set of frequencies to be sensed, and obtaining the sensing and monitoring result includes:

[0022] Switch the frequency points currently used by the service network air interface to migration frequency points according to the spectrum sensing control instruction, where the migration frequency points are different from the frequency points in the set of frequencies to be sensed;

[0023] Control the service network air interface to maintain at the migration frequency point for a first preset time, and switch the service network air interface back to the frequency point used before the first preset time when the first preset time ends;

[0024] Sense and monitor the frequency points in the set of frequencies to be sensed within the first preset time, and obtain the sensing and monitoring result.

[0025] Further, reporting the sensing and monitoring result to the service base station guard module through the guarded network includes any one of the following:

[0026] Report the sensing and monitoring result periodically according to a preset reporting time interval;

[0027] When the sensing and monitoring result reaches the reporting threshold, report the sensing and monitoring result to the service base station guard module;

[0028] When the sensing and monitoring result reaches the reporting threshold, report the sensing and monitoring result to the service base station guard module, and report the sensing and monitoring result periodically according to a preset reporting time interval until the sensing and monitoring result is less than the reporting threshold and then stop reporting the sensing and monitoring result.

[0029] As another aspect of the present invention, there is provided a spectrum sensing device for a cooperative frequency handover network of a service base station node, which is used to implement the spectrum sensing method of the cooperative frequency handover network described above. Among them, it is applied to the service base station node, and the service base station node includes a service base station and a service base station guard module communicatively connected to the service base station. The service base station can be communicatively connected to a service terminal in the service terminal node to form a service network, and the service base station guard module can be communicatively connected to a service terminal guard module in the service terminal node to form a guard network; the spectrum sensing device for the cooperative frequency handover network of the service base station node includes:

[0030] A first generation module, configured to generate a frequency usage situation table for the service network air interface according to a network-level cooperative frequency control instruction transmitted by the guard network where it is located. The frequency usage situation table for the service network air interface can determine a set of frequencies to be sensed, and the set of frequencies to be sensed at least includes the frequency points currently used by the service network air interface of itself.

[0031] A second generation module, configured to generate a spectrum sensing control instruction according to the frequency usage situation table for the service network air interface, and spread the spectrum sensing control instruction through the guard network. The service terminal guard module can sense and monitor the service network air interface according to the spectrum sensing control instruction and the set of frequencies to be sensed.

[0032] A first sensing module, configured to sense and monitor the service network air interface according to the set of frequencies to be sensed.

[0033] As another aspect of the present invention, there is provided a spectrum sensing device for a cooperative frequency handover network of a service terminal node, which is used to implement the spectrum sensing method of the cooperative frequency handover network described above. Among them, it is applied to the service terminal node, and the service terminal node includes a service terminal and a service terminal guard module communicatively connected to the service terminal. The service terminal can be communicatively connected to a service base station in the service base station node to form a service network, and the service terminal guard module can be communicatively connected to a service base station guard module in the service base station node to form a guard network; the spectrum sensing device for the cooperative frequency handover network of the service terminal node includes:

[0034] A receiving module, configured to receive a spectrum sensing control instruction sent by the service base station guard module. Among them, the service base station guard module can generate a frequency usage situation table for the service network air interface according to a network-level cooperative frequency control instruction transmitted by the guard network where it is located. The frequency usage situation table for the service network air interface is used to determine a set of frequencies to be sensed, and the set of frequencies to be sensed at least includes the frequency points currently used by the service network air interface of itself.

[0035] A second sensing module, configured to sense and monitor the air interface of the service network according to the spectrum sensing control instruction and the set of frequencies to be sensed, and obtain a sensing and monitoring result;

[0036] A reporting module, configured to report the sensing and monitoring result to the service base station escort module through the escort network.

[0037] As another aspect of the present invention, there is provided a communication system, which includes:

[0038] A service base station node and a service terminal node communicatively connected to the service base station node;

[0039] The service base station node includes a service base station and a service base station escort module communicatively connected to the service base station. The service base station escort module includes the spectrum sensing device for the collaborative frequency switching network of the service base station node as described above;

[0040] The service terminal node includes a service terminal and a service terminal escort module communicatively connected to the service terminal. The service terminal escort module includes the spectrum sensing device for the collaborative frequency switching network of the service terminal node as described above;

[0041] The service base station is communicatively connected to the service terminal to form a service network, and the service base station escort module and the service terminal escort module are communicatively connected to form an escort network.

[0042] The spectrum sensing method of the collaborative frequency switching network of the present invention obtains the air interface frequency usage situation table of the service network by receiving the network-level collaborative frequency control instruction transmitted by other service base stations through the escort network, and then generates a frequency sensing control instruction according to the air interface frequency usage situation table of the service network, senses the air interface frequency of the service network according to the set of frequencies to be sensed, and obtains a sensing and monitoring result, so as to be able to sense and identify the air interface spectrum of the cellular network through spectrum sensing, so as to assist in frequency switching to avoid interference when monitoring anomalies, and achieve the purpose of effectively improving the anti-interference ability of the communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the following specific embodiments, but do not constitute a limitation to the present invention.

[0044] Figure 1 It is a structural block diagram of the communication system provided by the present invention.

[0045] Figure 2 It is a structural block diagram of the service base station node provided by the present invention.

[0046] Figure 3Block diagram of the service terminal node provided by the present invention.

[0047] Figure 4 Block diagram of the spectrum sensing device of the cooperative frequency switching network for the service base station node provided by the present invention.

[0048] Figure 5 Flowchart of the spectrum sensing method of the cooperative frequency switching network on the service base station side provided by the present invention.

[0049] Figure 6 Flowchart of sensing and monitoring the air interface of the service network provided by the present invention.

[0050] Figure 7 Block diagram of the spectrum sensing device of the cooperative frequency switching network for the service terminal node provided by the present invention.

[0051] Figure 8 Flowchart of the spectrum sensing method of the cooperative frequency switching network on the service terminal side provided by the present invention.

[0052] Figure 9 Flowchart of the specific implementation process of the spectrum sensing method of the cooperative frequency switching network on the service base station side provided by the present invention.

[0053] Figure 10 Schematic diagram of the 5G cell uplink and downlink time slots and flexible time slot configuration provided by the present invention.

[0054] Figure 11 Schematic diagram of the deployment of the service base station node and the service terminal node in a single service base station provided by the present invention.

[0055] Figure 12 Schematic diagram of the time slots of the service base station guard module provided by the present invention.

[0056] Figure 13 Schematic diagram of the time slot configuration of the service base station guard module provided by the present invention.

[0057] Figure 14 Schematic diagram of the air interface radio frame timing relationship between the service base station side and the service terminal side provided by the present invention.

[0058] Figure 15 Schematic diagram of the access cell of the service terminal in a multi-service base station provided by the present invention. Detailed implementation manners

[0059] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0060] To enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0061] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present invention described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0062] Currently, when the cellular network is applied to commercial and other fields, due to its lack of anti-interference ability, when encountering interference, it may cause communication degradation or even service interruption.

[0063] Based on this, in the embodiments of the present invention, a communication system 10 is provided, as Figure 1 shown, which includes a service base station node 100 and a service terminal node 200 communicatively connected to the service base station node 100. The service base station node 100 includes a service base station 110 and a service base station guard module 120 communicatively connected to the service base station 110. The service terminal node 200 includes a service terminal 210 and a service terminal guard module 220 communicatively connected to the service terminal 210. The communication connection between the service base station 110 and the service terminal 210 can form a service network, and the communication connection between the service base station guard module 120 and the service terminal guard module 220 can form a guard network.

[0064] In the embodiments of the present invention, the service base station is mainly the base station of the service network, such as a 5G base station; the service base station guard module is mainly used to integrate with the service base station, support interconnection and interoperability with the service terminal guard module and other service base station guard modules to form a guard network.

[0065] The service terminal is mainly the terminal of the service network, such as a 5G terminal; the service terminal guard module is mainly integrated with the service terminal, support interconnection and interoperability with the service base station guard module and other service terminal guard modules to form a guard network.

[0066] In addition, the service network is mainly a wireless communication network composed of service base stations and service terminals for service bearing, such as 4G cellular networks, 5G cellular networks, etc.; the escort network is mainly composed of a service base station escort module and a service terminal escort module, mainly used to provide the escort ability of cooperative frequency switching for service base stations or service terminals to avoid interference.

[0067] It should be understood that in the embodiments of the present invention, the service terminal deploys a service terminal escort module to construct an escort network with the service base station escort module deployed on the service base station. The service terminal escort module receives a network cooperative frequency switching instruction from the service base station escort module, and this instruction notifies the occurrence time and target frequency point of the frequency change of the service terminal node. The service terminal escort module assists the service terminal in switching the air interface frequency of the service terminal node to the target frequency point when the occurrence time of the frequency change arrives, ensuring that the service terminal and the service base station change frequencies synchronously and bypassing the standard 3GPP protocol processing process (that is, the frequency switching process keeps the working parameters and protocol process of the communication system unchanged). Through this method, the cellular network can sense the air interface spectrum situation in real time and avoid interference.

[0068] It should be noted that when the service terminal does not deploy the terminal escort module, the frequency of the service terminal needs to be determined for the initial frequency and frequency switching through the standard 3GPP protocol. Since the 3GPP protocol itself has the problem of poor anti-interference ability, therefore, the communication system provided by the present invention, by deploying a service terminal escort module on the service terminal and a service base station escort module on the service base station, the service terminal escort module and the service base station escort module can assist the service base station and the service terminal in synchronously changing the working frequency to achieve network cooperative frequency transformation. At the same time, the service terminal escort module deployed on the service terminal side interacts with different service base station escort modules and assists the service terminal in selecting the best cell for handover based on the communication measurement results, so as to ensure that the entire communication network can achieve fast handover when the terminal device moves at the cell edge on the premise of having strong anti-interference ability and avoid service interruption when the terminal device performs cell handover.

[0069] In the embodiments of the present invention, as Figure 2 shown, the service base station 110 and the service base station escort module 120 are communicatively connected through a radio frequency interface. The service base station escort module 120 can convert the working frequency of the service base station 110 and emit it at the service air interface of the service base station escort module 120, and can also convert the air interface frequency received at the service air interface and send it to the service base station 110 through the radio frequency interface; the service base station escort module 120 can send a timing signal to the service base station 110, and the time of the service base station escort module 120 is synchronized with the escort network.

[0070] Specifically, the service base station node consists of a service base station and a service base station guard module. The service base station 110 is interconnected with the service radio frequency interface of the service base station guard module 120 through a radio frequency interface. The transmitted signal (operating frequency) of the service base station is frequency-converted by the auxiliary frequency switching unit of the service base station guard module 120 and then sent out at the service air interface of the service base station guard module 120 (air interface frequency); the signal received at the service air interface of the service base station guard module (air interface frequency) is frequency-converted by the auxiliary frequency switching unit of the service base station guard module 120 (operating frequency) and then sent to the radio frequency interface of the service base station through the service radio frequency interface. The whole process is transparent to the service base station. The operating frequency of the service base station is determined by the device capabilities and configurations, and the air interface frequency of the service base station node is determined by the control of the service base station guard module.

[0071] In the embodiment of the present invention, the time synchronization signal of the service base station comes from the service base station guard module, and the guard network formed by the communication unit between different guard modules can achieve guard network-level time synchronization. The service base station guard module can also achieve time synchronization by receiving an external clock signal (such as an external Beidou, 1588, etc. external synchronization source) through the external synchronization interface.

[0072] As Figure 3 shown, the service terminal 210 and the service terminal guard module 220 are communicatively connected through a radio frequency interface. The service terminal guard module 220 can frequency-convert the operating frequency of the service terminal 210 and send it out at the service air interface of the service terminal guard module 220, and can also frequency-convert the air interface frequency received at the service air interface and send it to the service terminal 210 through the radio frequency interface; the time of the service terminal 210 is synchronized with the service base station 110, and the time of the service terminal guard module 220 is synchronized with the guard network it belongs to.

[0073] Specifically, the service terminal node consists of a service terminal and a service terminal guard module. The service terminal is interconnected with the service radio frequency interface of the service terminal guard module through a radio frequency interface. The transmitted signal (operating frequency) of the service terminal is frequency-converted by the auxiliary frequency switching unit and then sent out at the service air interface of the service terminal guard module (air interface frequency); the signal received at the service air interface of the service terminal guard module (air interface frequency) is frequency-converted by the auxiliary frequency switching unit (operating frequency) and then sent to the radio frequency interface of the service terminal through the service radio frequency interface. The whole process is transparent to the service terminal. The operating frequency of the service terminal is determined by the service terminal protocol stack, and the air interface frequency of the service terminal node is determined by the service terminal guard module according to the instructions of the service base station guard module and is consistent with the affiliated service base station node.

[0074] In the embodiments of the present invention, the service terminal is synchronized with the service base station, and there is no need for the service terminal guard module to provide timing for the service terminal; the service terminal guard module is synchronized with the service base station guard module to which it belongs through the guard network formed by the communication unit.

[0075] Therefore, in the embodiments of the present invention, taking the service base station guard module as the time reference, the service base station is synchronized with the service base station guard module through the timing interface; the service terminal is synchronized with the service base station through the standard air interface protocol; the service terminal guard module is synchronized with the service base station guard module through the guard network; thus, a unified timing reference can be formed for the entire communication system.

[0076] As Figure 3 shown, taking the structural block diagram of the service terminal guard module 220 as an example, it includes at least an intelligent control unit 221, a communication unit 222, an auxiliary frequency switching unit 223, a spectrum sensing unit 224, and a clock unit 225.

[0077] Among them, the communication unit 222 interacts with other guard modules to construct a guard network, establishes an interaction channel between guard modules, and maintains the network-level time synchronization relationship between guard modules; the communication unit provides a bearer service externally through a service interface, assists in expanding the service network coverage, and at the same time, when the service network is interrupted, it can also provide a guaranteed communication service.

[0078] The auxiliary frequency switching unit 223 is used to assist the external device (service base station / service terminal) connected to the service radio frequency interface to perform two-way switching between the operating frequency and the air interface frequency at a given moment under the control of the intelligent control unit, and the switching process is transparent to the external device.

[0079] The spectrum sensing unit 224 is used to sense and monitor the air interface spectrum situation under the control of the intelligent control unit;

[0080] The clock unit 225 can support providing synchronous timing services for external devices through the timing interface; at the same time, the clock unit also provides clock services for other units of the guard module. When an external synchronization signal is input, the clock unit can adjust the local clock based on the external synchronization signal; when no external synchronization signal is input, the clock unit can adjust the local clock according to the output of the communication unit.

[0081] The intelligent control unit 221 obtains the radio frequency spectrum situation of its own module through the spectrum sensing unit, shares and exchanges the respective radio frequency spectrum situations with other modules through the communication unit, forms a collaborative frequency usage strategy, generates the specific radio frequency change time and the specific frequency point number to be used based on this frequency usage strategy, and spreads it to the intelligent control units of other modules through the communication unit, and collaboratively controls the auxiliary frequency switching unit to synchronously switch the frequency, so as to realize the real-time change of the radio frequency of the service network air interface and avoid interference; the intelligent control unit can also perform collaborative control on the analog base station and the terminal through the control interface.

[0082] The service air interface is specifically expressed as the input / output interface of the service network air interface frequency, that is, the actual air interface of the service network; the guard air interface is specifically expressed as the air interface of the guard network, which is multiplexed by the communication unit and the spectrum sensing unit.

[0083] When the above communication system realizes interference avoidance, it is necessary to perform spectrum sensing on the service network air interface to realize interference avoidance when it is determined that there is interference. Therefore, in order to avoid interference with the service network air interface frequency, the spectrum sensing unit of the service base station guard module at least includes a spectrum sensing device for the collaborative frequency switching network of the service base station node, and the spectrum sensing unit of the service terminal guard module at least includes a spectrum sensing device for the collaborative frequency switching network of the service terminal node.

[0084] Setting a spectrum sensing device for the collaborative frequency switching network of the service base station node in the service base station guard module can obtain the service network air interface frequency usage situation table according to the network-level collaborative frequency control instruction transmitted by the guard network where it is located, and then generate a frequency sensing control instruction according to this service network air interface frequency usage situation table, and sense the service network air interface frequency according to the frequency set to be sensed, so as to be able to sense and identify the radio frequency spectrum of the cellular network air interface through spectrum sensing, so as to assist in frequency switching to avoid interference when the sensed frequency point is interfered, thereby effectively improving the anti-interference ability of the communication system.

[0085] Correspondingly, setting a spectrum sensing device for the collaborative frequency switching network of the service terminal node in the service terminal guard module, it senses and monitors the service network air interface based on the spectrum sensing control instruction sent by the service base station guard module and the frequency set to be sensed. And because the service terminal guard module and the service base station guard module belong to the same guard network, they can maintain time synchronization, and the sensing of the frequency points to be sensed can also be synchronized. Thus, it can sense and identify the radio frequency spectrum of the cellular network air interface through spectrum sensing, so as to assist in realizing frequency switching in a collaborative manner when an abnormal frequency point is sensed to avoid interference, and jointly with the service base station guard module to achieve the effect of improving the anti-interference ability of the communication system.

[0086] As another embodiment of the present invention, there is provided a spectrum sensing device for a cooperative frequency handover network of a service base station node, which is used to implement the spectrum sensing method of the cooperative frequency handover network described below, such as Figure 4 As shown, the spectrum sensing device 300 for the cooperative frequency handover network of the service base station node includes:

[0087] A first generation module 310, configured to generate a service network air interface frequency usage situation table according to a network-level cooperative frequency control instruction transmitted by the local guard network. The service network air interface frequency usage situation table can determine a set of frequencies to be sensed, and the set of frequencies to be sensed includes at least the frequency points currently used by the air interface of its own service network;

[0088] A second generation module 320, configured to generate a spectrum sensing control instruction according to the service network air interface frequency usage situation table, and spread the spectrum sensing control instruction through the guard network. The service terminal guard module can sense and monitor the service network air interface according to the spectrum sensing control instruction and the set of frequencies to be sensed;

[0089] A first sensing module 330, configured to sense and monitor the service network air interface according to the set of frequencies to be sensed.

[0090] In an embodiment of the present invention, by receiving a network-level cooperative frequency control instruction transmitted by other service base stations through the guard network, a service network air interface frequency usage situation table is obtained, and then a frequency sensing control instruction is generated according to the service network air interface frequency usage situation table. The service network air interface is sensed according to the set of frequencies to be sensed to obtain a sensing and monitoring result, so that the air interface spectrum of the cellular network can be sensed and identified through spectrum sensing, so as to assist in frequency handover to avoid interference when monitoring anomalies, and achieve the purpose of effectively improving the anti-interference ability of the communication system.

[0091] In this embodiment, a spectrum sensing method for a cooperative frequency handover network is provided, which is applied to a service base station node. Figure 5 It is a flowchart of the spectrum sensing method for the cooperative frequency handover network provided by the embodiment of the present invention, as Figure 5 shown, including:

[0092] S110. Generate a service network air interface frequency usage situation table according to a network-level cooperative frequency control instruction transmitted by the local guard network. The service network air interface frequency usage situation table can determine a set of frequencies to be sensed, and the set of frequencies to be sensed includes at least the frequency points currently used by the air interface of its own service network;

[0093] In an embodiment of the present invention, based on the network-level collaborative frequency control instructions collected from other service base station guard modules, the service base station guard module can form an accurate service network air interface frequency usage situation table at different times within the adjacent area. It should be understood that while the service base station guard module itself sends network-level collaborative frequency control instructions to other service base station guard modules, it can also receive network-level collaborative frequency control instructions sent by other service base station guard modules.

[0094] S120. Generate a spectrum sensing control instruction according to the service network air interface frequency usage situation table, and spread the spectrum sensing control instruction through the guard network. The service terminal guard module can sense and monitor the service network air interface according to the spectrum sensing control instruction and the set of frequencies to be sensed.

[0095] In an embodiment of the present invention, the service base station guard module obtains at least a spectrum sensing control instruction according to the service network air interface frequency usage situation table, and spreads the spectrum sensing control instruction.

[0096] S130. Sense and monitor the service network air interface according to the set of frequencies to be sensed.

[0097] In an embodiment of the present invention, the service base station guard module can sense and monitor the service network air interface according to the determined set of frequencies to be sensed.

[0098] It should be understood that the service base station guard module can send a spectrum sensing control instruction through the guard network to instruct the service terminal guard module to sense and monitor the set of frequencies to be sensed.

[0099] It should be noted that the frequencies in the set of frequencies to be sensed in the embodiment of the present invention at least include the air interface frequencies of its own service network, and can also include the service network air interface frequencies used by other service base stations in the adjacent area in the service network air interface frequency usage situation table.

[0100] The spectrum sensing method of the collaborative frequency switching network of the present invention obtains the service network air interface frequency usage situation table by receiving network-level collaborative frequency control instructions transmitted by other service base stations through the guard network, and then generates a frequency sensing control instruction according to the service network air interface frequency usage situation table, senses the service network air interface frequencies according to the set of frequencies to be sensed, and obtains the sensing and monitoring results, so as to be able to sense and identify the air interface spectrum of the cellular network through spectrum sensing, so as to assist in frequency switching to avoid interference when monitoring anomalies, and achieve the purpose of effectively improving the anti-interference ability of the communication system.

[0101] In the embodiments of the present invention, the service base station guard module diffuses the air interface parameters of the cell to each service terminal guard module through the guard network ("cell parameter indication"). The service base station guard module periodically sends the "cell parameter indication"; when the cell parameters change, the service base station guard module additionally triggers the "cell parameter indication" once; when the service base station guard module finds that a new service terminal guard module belongs to itself, it will actively send a separate "cell parameter indication" to accelerate the service terminal guard module to prepare the air interface frequency of the service network as soon as possible.

[0102] Since when implementing interference avoidance for a communication system, it is necessary to accurately sense the spectrum of the air interface of the service network to determine whether there is interference in order to achieve accurate avoidance. Therefore, when the service base station guard module and the service terminal guard module perform air interface sensing of the service network, they accurately distinguish whether an abnormal frequency is interference or the work of the normal service network. That is, in order to improve the accuracy of frequency sensing of the service base station guard module, the frequency point where the current air interface of the service network is located can be switched to a migration frequency point to realize the sensing and monitoring of the frequency points in the frequency set to be sensed.

[0103] Specifically, as Figure 6 shown, the air interface of the service network is sensed and monitored according to the frequency set to be sensed, including:

[0104] S131. Switch the frequency point currently used by the air interface of the service network to a migration frequency point, where the migration frequency point is different from the frequency points in the frequency set to be sensed;

[0105] It should be understood that for the frequency point currently used by the air interface of the service network, it is switched to the migration frequency point, and the migration frequency point is different from the frequency points in the frequency set to be sensed.

[0106] S132. Control the air interface of the service network to remain at the migration frequency point for a first preset time, and switch the air interface of the service network back to the frequency point used before the first preset time when the first preset time ends;

[0107] Here it should be understood that, for example, if the frequency point currently used by the air interface of the service network is F1 and the migration frequency point is F2, then the air interface of the service network is switched from F1 to F2, and the air interface of the service network is controlled to remain at F2 for the first preset time, and F1 is sensed and monitored within the first preset time, and the air interface of the service network is switched back to F1 after the first preset time ends.

[0108] S133. Sense and monitor the frequency points in the frequency set to be sensed within the first preset time and obtain the sensing and monitoring results.

[0109] After switching the air interface of the current service network from the currently used frequency point to the migrated frequency point, control the air interface of the current service network to remain at the migrated frequency point for a first preset time, and sense the frequency points in the to-be-sensed frequency set within this first preset time. Since there is no service transmission on the frequency points in the current to-be-sensed frequency set, it is possible to accurately sense whether the frequency points in the current to-be-sensed frequency set are interfered with.

[0110] In an embodiment of the present invention, the to-be-sensed frequency set further includes frequency points that are not currently used by the air interface of its own service network within a preset number of hops, and the sensing priority of the frequency points currently used by the air interface of its own service network is higher than that of the frequency points currently used by the air interface of non-own service networks.

[0111] Specifically, the spectrum sensing method for collaborative frequency switching further includes:

[0112] Diffuse the network-level collaborative frequency control instruction by the escort network within at least 1 hop range;

[0113] When the network-level collaborative frequency control instruction within the preset number of hops can be received through the escort network, diffuse the current network-level collaborative frequency control instruction within the preset number of hops.

[0114] In an embodiment of the present invention, the service base station escort module can diffuse the network-level collaborative frequency control instruction within 1 hop through the escort network. If the service base station escort module discovers other service base station escort modules within two hops through the escort network, it is necessary to diffuse the network-level collaborative frequency control instruction to these service base station escort modules.

[0115] By diffusing the network-level collaborative frequency control instruction to the service base station escort modules within two hops, the air interface frequencies of the service networks within the preset number of hops can be included in the frequency sensing range. When performing sensing, the air interface frequency of its own service network is sensed first, followed by the air interface frequencies of the service networks within the preset number of hops, avoiding the co-frequency interference caused by the service network transceiver in the adjacent area to the spectrum sensing; when there is still idle time domain resource, other frequencies in the service network frequency set can also be sensed and monitored.

[0116] In an embodiment of the present invention, when performing sensing and monitoring on the radio frequency of the service network air interface, by switching the radio frequency of the service network air interface at the currently used frequency point to the migration frequency point, the frequency points in the frequency set to be sensed can be sensed. Specifically, when sensing the frequency points in the frequency set to be sensed, it can be determined whether the to-be-sensed frequency point is interfered by judging whether the background noise of the frequency point in the currently to-be-sensed frequency set is greater than a preset threshold. If the background noise of the currently to-be-sensed frequency point is greater than the preset threshold, it is determined that the currently to-be-sensed frequency point is interfered, and the radio frequency of the current service network air interface can be switched in coordination with the service terminal guard module to avoid interference.

[0117] Therefore, the spectrum sensing method for coordinated frequency switching provided by the present invention can improve the accuracy of sensing the frequency points to be sensed by switching the radio frequency of the service network air interface at the frequency points in the frequency set to be sensed to the migration frequency point, so as to obtain a more accurate frequency sensing result, and further effectively improve the anti-interference ability of the system.

[0118] As another embodiment of the present invention, a spectrum sensing device for a coordinated frequency switching network of a service terminal node is provided for the spectrum sensing method of the coordinated frequency switching network described below, as Figure 7 shown. The spectrum sensing device 400 for the coordinated frequency switching network of the service terminal node includes:

[0119] A receiving module 410, configured to receive a spectrum sensing control instruction sent by a service base station guard module, where the service base station guard module can generate a frequency usage situation table for the service network air interface according to a network-level coordinated frequency control instruction transmitted in the guarded network, and the frequency usage situation table for the service network air interface is used to determine a frequency set to be sensed, and the frequency set to be sensed at least includes the frequency points currently used by the service network air interface of itself;

[0120] A second sensing module 420, configured to perform sensing and monitoring on the service network air interface according to the spectrum sensing control instruction and the frequency set to be sensed, and obtain a sensing and monitoring result;

[0121] A reporting module 430, configured to report the sensing and monitoring result to the service base station guard module through the guarded network.

[0122] In an embodiment of the present invention, the service terminal protection module can perform frequency perception monitoring on the service network air interface based on the spectrum perception control instruction sent by the service base station protection module and the set of frequencies to be perceived. Since the service terminal protection module and the service base station protection module belong to the same protection network, they can maintain time synchronization. Furthermore, the perception of the frequency points in the set of frequencies to be perceived can also be synchronized. That is, when an abnormal frequency point is perceived, frequency switching can be achieved in a collaborative manner simultaneously to avoid interference, and together with the service base station protection module, the anti-interference ability of the communication system can be improved.

[0123] As another embodiment of the present invention, a spectrum perception method for a collaborative frequency switching network is provided, which is applied to a service terminal node. As Figure 8 shown, it is a flowchart of the spectrum perception method for the collaborative frequency switching network of the present invention. As Figure 8 shown, the spectrum perception method for the collaborative frequency switching network includes:

[0124] S210. Receive the spectrum perception control instruction sent by the service base station protection module, where the service base station protection module can generate a frequency usage situation table for the service network air interface according to the network-level collaborative frequency control instruction transmitted in the protection network, and the frequency usage situation table for the service network air interface is used to determine the set of frequencies to be perceived, and the set of frequencies to be perceived at least includes the frequency points currently used by its own service network air interface;

[0125] S220. Perform perception monitoring on the service network air interface according to the spectrum perception control instruction and the set of frequencies to be perceived, and obtain the perception monitoring result;

[0126] S230. Report the perception monitoring result to the service base station protection module through the protection network.

[0127] In an embodiment of the present invention, the service terminal protection module and the service base station protection module maintain time synchronization through the protection network. The service terminal protection module can perform perception monitoring on the service network air interface according to the spectrum perception control instruction and the set of frequencies to be perceived, and can report the monitored result to the service base station protection module.

[0128] The spectrum sensing method of the collaborative frequency switching network applied to the service terminal side provided by the present invention can perform frequency sensing and monitoring on the service network air interface based on the spectrum sensing control instruction sent by the service base station guard module and the frequency set to be sensed. Since the service terminal guard module and the service base station guard module belong to the same guard network, they can maintain time synchronization, and the sensing of the frequency points in the frequency set to be sensed can also be synchronized. Thus, it is possible to realize the sensing and identification of the air interface spectrum of the cellular network through spectrum sensing, so as to assist in achieving frequency switching in a collaborative manner when abnormal frequency points are sensed to avoid interference, and jointly act with the service base station guard module to achieve the effect of improving the anti-interference ability of the communication system.

[0129] In order to improve the frequency sensing accuracy of the service network air interface, frequency sensing and monitoring are performed on the service network air interface according to the spectrum sensing control instruction and the frequency set to be sensed, and a sensing and monitoring result is obtained, as Figure 9 shown, including:

[0130] S221. Switch the frequency point currently used by the service network air interface to a migration frequency point according to the spectrum sensing control instruction, where the migration frequency point is different from the frequency points in the frequency set to be sensed;

[0131] S222. Control the service network air interface to remain at the migration frequency point for a first preset time, and switch the service network air interface back to the frequency point used before the first preset time when the first preset time ends;

[0132] S223. Perform sensing and monitoring on the frequency points in the frequency set to be sensed within the first preset time, and obtain a sensing and monitoring result.

[0133] It should be understood that, similar to the service base station guard module, when the service terminal guard module performs frequency sensing, it also switches the frequency point currently used by the service network air interface to a migration frequency point, and the migration frequency point is different from the frequency points in the frequency set to be sensed. Sensing and monitoring are performed on the frequency points in the frequency set to be sensed within the first preset time when the service network air interface remains at the migration frequency point, so as to realize the accurate monitoring of the current frequency points to be sensed and obtain an accurate sensing and monitoring result.

[0134] It should be noted that in the embodiment of the present invention, the first preset time can be set as needed and is not limited here.

[0135] After the service terminal guard module obtains the sensing and monitoring result, it can report the sensing and monitoring result to the service base station guard module. In the embodiment of the present invention, reporting the sensing and monitoring result to the service base station guard module through the guard network includes any one of the following:

[0136] Report the perception monitoring results periodically according to a preset reporting time interval;

[0137] When the perception monitoring results reach the reporting threshold, report the perception monitoring results to the service base station escort module;

[0138] When the perception monitoring results reach the reporting threshold, report the perception monitoring results to the service base station escort module, and report the perception monitoring results periodically according to a preset reporting time interval until the perception monitoring results are less than the reporting threshold and then stop reporting the perception monitoring results.

[0139] To reduce the impact of periodically reporting perception result information on the escort network, the perception result reporting mode of the service terminal escort module supports three modes: periodic, event, and event-to-periodic.

[0140] 1) Periodic reporting: That is, make a reporting determination only based on the time dimension, and as long as the reporting period arrives, the perception results need to be reported.

[0141] 2) Event reporting: That is, make a reporting determination only based on whether the triggering event occurs. As long as the event occurs, report the perception results, otherwise do not report the perception results.

[0142] 3) Event-to-periodic reporting: That is, first make a reporting determination based on whether the triggering event occurs. Once the reporting event occurs, trigger the service terminal escort module to report the perception results once, and at the same time, the perception results are converted to periodic reporting until the stop reporting event is triggered or the perception result reporting mode is reconfigured.

[0143] The following details the specific implementation process of the spectrum sensing method for the collaborative frequency switching network of the present invention.

[0144] Assume that the subcarrier spacing of a 5G cell is 30 kHz, using the TDD mode, normal CP, the slot configuration period is 5 ms, and the uplink-downlink slot ratio and flexible slot configuration are as Figure 10 shown, uplink-downlink slot configuration (7 downlink slots, 2 uplink slots, 1 flexible slot), flexible slot configuration (6 downlink symbols, 4 uplink symbols, 4 flexible symbols).

[0145] The radio frame length of the cell air interface is 10 ms, the subframe length is 1 ms, the slot length is 0.5 ms, there are 14 OFDM symbols in a single slot, and the guard interval for the downlink-to-uplink conversion is 4 OFDM symbol times. Since the service terminal will advance the air interface radio frame when transmitting uplink, there is no need to define the guard interval for the uplink-to-downlink conversion in the protocol.

[0146] Let the working frequency set of the service network be \(F_w=\{F_1,F_2,\cdots,F_m\}\); the available air interface frequency set of the service network be \(F_r = \{F_1',F_2',\cdots,F_n'\}\), where \(m\) may not be equal to \(n\), and \(F_w\) and \(F_r\) may have no intersection or may have an intersection, and the present invention does not make any restrictions.

[0147] For the application scenario of a single-service base station, such as Figure 11 and Figure 12 As shown, one cell 1 (ID = 1) is deployed on the service base station, with the working frequency \(F_1\). After being frequency-converted by the service base station guard module, the air interface frequency of the service network becomes \(F_1'\); the working frequency of the service terminal is \(F_1\), and it camps in cell 1.

[0148] 1) The service base station guard module carries the transmission time of the current frame in the air interface radio frame sent by the guard network. The service terminal guard module obtains the time deviation and path delay from the service base station guard module through the air interface ranging process with the service base station, and thus realizes time synchronization with the service base station guard module.

[0149] 2) The service base station guard module provides timing for the service base station through its own timing interface (for example, the service base station guard module provides a second pulse signal and UTC time information); after the service base station is started, it aligns the air interface radio frame boundary to the whole second.

[0150] 3) As Figure 13 shown, the service base station guard module can obtain the following parameters of cell 1 through configuration: technical regime (5G), working mode (TDD), subcarrier spacing (30 kHz), uplink and downlink configuration period (5 ms), uplink and downlink time slot configuration (downlink time slot 7, uplink time slot 2, flexible time slot 1), flexible time slot configuration (downlink symbols 6, uplink symbols 4, flexible symbols 4), and the offset of the air interface radio frame boundary relative to the "whole second" is 0.

[0151] 4) The service base station guard module can determine the exact times of the cell radio frame, subframe, time slot, and the protection band for the downlink to uplink conversion based on the cell parameters; the transceiver conversion time of the service base station guard module is consistent with that of the service base station.

[0152] 5) The service base station guard module periodically broadcasts and sends cell parameter indications on the guard network. The message carries: serial number, service base station node ID (1), service base station guard module ID (1), service base station ID (1), cell ID (1), and the parameter information of cell 1 (the same as the parameters in 3); when the parameters of cell 1 change, the service base station guard module will additionally broadcast a cell parameter indication once; when a new service terminal guard module joins the guard network, the service base station guard module will actively push a cell parameter indication once through unicast.

[0153] 6) The service terminal guard module is time-synchronized with the service base station guard module, and the path delay to the service base station guard module is known. Therefore, after receiving the cell parameter indication, the exact time of the radio frame, sub-frame, time slot, symbol, and transmit-receive transition moment in the air interface can be obtained.

[0154] As Figure 14 shown, it is the timing relationship of the radio frame in the air interface on the service base station side and the service terminal side. Among them, the service base station side is consistent with the protocol. There is only a guard interval for the downlink to uplink transition, and no guard interval is required for the uplink to downlink transition. The downlink of the radio frame on the service terminal side lags behind the service base station's air interface by the "path delay" duration. The service terminal needs to send the uplink in advance of the uplink frame boundary of the service base station. The advance time is the "time advance" of the air interface specified by the protocol. After the last uplink symbol of the service terminal is sent, there are no other uplink and downlink signals in its air interface until the downlink signal arrives.

[0155] Since the service base station is time-synchronized with the service base station guard module, the timing of the service base station guard module can be easily matched with that of the service base station to ensure the normal transceiver of the radio frame in the air interface on the service base station side. That is, the service base station guard module needs to be in the transmit state (TX) at all downlink moments in the air interface and in the receive state (RX) at all uplink moments in the air interface.

[0156] The timing of the service terminal guard module should ensure the normal transceiver of the radio frame in the air interface on the service terminal side (matching the timing of the radio frame in the air interface on the service terminal side). Therefore, based on the timing of the radio frame in the air interface on the service base station side, the service terminal guard module should be in the receive state (RX) at the latest before lagging behind the downlink in the air interface by the "path delay", and the duration should be greater than or equal to the downlink duration in the air interface. The service terminal guard module should be in the transmit state (TX) at the latest before advancing the uplink in the air interface by the "time advance", and the duration should be greater than or equal to the uplink duration in the air interface.

[0157] 7) The service terminal and the service base station maintain air interface synchronization through the standard protocol process; the transceiver timing is the same as that of the service terminal in Figure 13 .

[0158] 8) The service base station guard module broadcasts the "network-level cooperative frequency control instruction" periodically through the guard network. When the effective content of the "network-level cooperative frequency control instruction" changes, the service base station guard module will trigger an additional broadcast of the "network-level cooperative frequency control instruction". When a new service terminal guard module joins the guard network, the service base station guard module will actively push the "network-level cooperative frequency control instruction" once through unicast.

[0159] 9) The "network-level collaborative frequency control instruction" carries at least the following content: message sequence number, service base station node ID(1), service base station guard module ID(1), service base station ID(1), working cell ID(1), cell working frequency (F1), cell air interface frequency (F1'), transmit power (10W), cell air interface frequency effective time (immediately), etc.

[0160] 10) Since there is only one service base station 1 (service base station 1 guard module) in the network, the "service network air interface frequency usage situation table" of the service base station 1 guard module has only 1 item:

[0161] Table 1 Service network air interface frequency usage situation table

[0162]

[0163] 11) The service base station guard module periodically broadcasts and sends the "spectrum sensing control instruction" through the guard network. The content of this instruction includes: message sequence number, service base station node ID(1), service base station guard module ID(1), service base station ID(1), working cell ID(1), resource period (1s), resource offset (0: the first time slot of the first radio frame after aligning to the whole second), frequency set to be sensed (F1'), resource duration (1 slot), continuous duration (permanent, until reconfigured), spectrum sensing result reporting configuration (event to period: event threshold 1: -80dBm, period: 100ms, event threshold 2: -85dBm), migration frequency (Fx point. When measuring F1', the cell air interface frequency switches to Fx, Fx≠F1').

[0164] 12) The service base station guard module switches the service network air interface frequency (i.e., the cell air interface frequency) to the migration frequency point Fx at the first time slot of the first air interface radio frame corresponding to each whole second, and maintains it for 1 slot of time, and then switches the frequency back to F1';

[0165] 13) The service terminal guard module switches the cell air interface frequency to Fx at the first time slot of the first air interface radio frame corresponding to each whole second according to the spectrum sensing control instruction, and maintains it for 1 slot of time, and then switches the frequency back to F1';

[0166] 14) The service base station guard module and the service terminal guard module preferentially sense F1' according to the device sensing and measurement speed during the above slot time. If multiple sensing and measurements are possible, the frequencies in Fr that are not equal to Fx are sensed in the order of the duration from the previous sensing, and the frequencies that are farther from the previous sensing are sensed first;

[0167] 15) Other frequencies in Fr that are not F1' can be sensed and monitored on any idle time domain resources.

[0168] 16) When the service terminal guard module senses that the frequency floor noise is greater than or equal to the event threshold 1 (-80 dBm), it triggers a report of the spectrum sensing result. After that, it continuously reports the spectrum sensing result at a period of 100 ms until all sensed frequency floor noises are less than the event threshold 2 (-85 dBm), and then stops the periodic reporting of the spectrum sensing result.

[0169] For the multi-service base station scenario, such as Figure 15 shown, there are 3 service base stations in the network. The guard networks are connected as a whole, and the air interface parameters of the cells deployed on each service base station are the same. There are 2 cells deployed on service base station 1, 2 cells deployed on service base station 2, and 1 cell deployed on service base station 3. The coverage areas of each cell are as Figure 15 shown, and each service terminal accesses different cells according to the relationship as Figure 15 shown.

[0170] 1) The service base station guard module in the guard network selects the guard module of service base station 1 as the synchronization source of the guard network based on the Id size; the guard modules of service base station 2 and service base station 3 maintain time synchronization with the guard module of service base station 1 through the guard network; each service base station guard module provides timing for its own service base station.

[0171] 2) The guard modules of service terminal 1 and service terminal 2 maintain time synchronization with the guard module of service base station 1; the guard modules of service terminal 3 and service terminal 4 maintain time synchronization with the guard module of service base station 2; the guard module of service terminal 5 maintains time synchronization with the guard module of service base station 3; each service terminal accesses each cell according to the relationship shown in the figure.

[0172] 3) The timing relationship of air interface transmission and reception between the service base station guard module and the service terminal guard module is the same as that in the single-service base station scenario.

[0173] 4) Each service base station guard module periodically broadcasts and sends cell parameter indications on the guard network.

[0174] 5) Each service base station guard module periodically broadcasts and sends network-level cooperative frequency control instructions through the guard network. The sending content is shown in Table 2 below:

[0175] Table 2 Sending Content of Network-Level Cooperative Frequency Control Instructions

[0176]

[0177]

[0178] Since the guard module of service base station 2 and the guard module of service base station 3 are two-hop reachable through the guard module 2 of service base station 1, they will send each other's network-level cooperative frequency control instructions. Eventually, the guard modules of all three service base stations can collect the network-level cooperative frequency control instructions of the other two service base station guard modules.

[0179] 6) The frequency usage situation table of the service network air interface of each service base station guard module is shown in Table 3.

[0180] Table 3 Frequency Usage Situation Table of Service Network Air Interface

[0181]

[0182] 7) Each service base station guard module periodically broadcasts and sends spectrum sensing control instructions through the guard network. The instruction content is shown in Table 4 below:

[0183] Table 4 Spectrum Sensing Control Instruction Table

[0184]

[0185]

[0186] In summary, for the spectrum sensing method of the cooperative frequency switching network provided by the present invention, when sensing the air interface frequency of a cell, the air interface frequency of the service network is first switched to other idle frequencies to avoid co-channel interference. This spectrum sensing method can be applied to network devices of various different systems and modes such as FDD, TDD, 4G, and 5G.

[0187] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A spectrum sensing method for a cooperative frequency switching network, characterized in that Applied to a service base station node, the service base station node includes a service base station and a service base station guard module communicatively connected to the service base station. The service base station can communicatively connect with a service terminal in a service terminal node to form a service network, and the service base station guard module can communicatively connect with a service terminal guard module in the service terminal node to form a guard network; The spectrum sensing method of the collaborative frequency switching network includes: Generating a service network air interface frequency usage situation table according to the network-level collaborative frequency control instruction transmitted by the guard network where it is located. The service network air interface frequency usage situation table can determine a set of frequencies to be sensed, and the set of frequencies to be sensed at least includes the frequency points currently used by its own service network air interface; Generating a spectrum sensing control instruction according to the service network air interface frequency usage situation table, and spreading the spectrum sensing control instruction through the guard network. The service terminal guard module can sense and monitor the service network air interface according to the spectrum sensing control instruction and the set of frequencies to be sensed; Sensing and monitoring the service network air interface according to the set of frequencies to be sensed.

2. The spectrum sensing method of the collaborative frequency switching network according to claim 1, characterized in that, Sensing and monitoring the service network air interface according to the set of frequencies to be sensed includes: Switching the frequency points currently used by the service network air interface to migration frequency points, where the migration frequency points are different from the frequency points in the set of frequencies to be sensed; Controlling the service network air interface to maintain a first preset time at the migration frequency point, and switching the service network air interface back to the frequency point used before the first preset time when the first preset time ends; Sensing and monitoring the frequency points in the set of frequencies to be sensed within the first preset time, and obtaining a sensing and monitoring result.

3. The spectrum sensing method of the cooperative frequency switching network according to claim 1, characterized in that, The set of frequencies to be sensed further includes frequency points within a preset number of hops that are not currently used by its own service network air interface, and the sensing priority of the frequency points currently used by its own service network air interface is higher than that of the frequency points within a preset number of hops that are not currently used by its own service network air interface.

4. The spectrum sensing method of the cooperative frequency switching network according to claim 1, characterized in that The spectrum sensing method of the collaborative frequency switching network further includes: Spreading the network-level collaborative frequency control instruction through the guard network within at least 1 hop range; When the network-level collaborative frequency control instruction within a preset number of hops can be received through the guard network, spreading the current network-level collaborative frequency control instruction within the preset number of hops.

5. A spectrum sensing method for a cooperative frequency switching network, characterized in that, Applied to a service terminal node, the service terminal node includes a service terminal and a service terminal guard module communicatively connected to the service terminal. The service terminal can communicatively connect with a service base station in a service base station node to form a service network, and the service terminal guard module can communicatively connect with a service base station guard module in the service base station node to form a guard network; The spectrum sensing method of the collaborative frequency switching network includes: Receiving a spectrum sensing control instruction sent by the service base station guard module, where the service base station guard module can generate a service network air interface frequency usage situation table according to the network-level collaborative frequency control instruction transmitted by the guard network where it is located. The service network air interface frequency usage situation table is used to determine a set of frequencies to be sensed, and the set of frequencies to be sensed at least includes the frequency points currently used by its own service network air interface; Perceive and monitor the air interface of the service network according to the spectrum sensing control instruction and the frequency set to be sensed, and obtain the perception and monitoring result; Report the perception and monitoring result to the service base station guard module through the guard network.

6. The spectrum sensing method of the collaborative frequency switching network according to claim 5, characterized in that, Perceive and monitor the air interface of the service network according to the spectrum sensing control instruction and the frequency set to be sensed, and obtain the perception and monitoring result, including: Switch the frequency point currently used by the air interface of the service network to the migration frequency point according to the spectrum sensing control instruction, and the migration frequency point is different from the frequency points in the frequency set to be sensed; Control the air interface of the service network to maintain the first preset time at the migration frequency point, and switch the current air interface of the service network back to the frequency point used before the first preset time when the first preset time ends; Perceive and monitor the frequency points in the frequency set to be sensed within the first preset time, and obtain the perception and monitoring result.

7. The spectrum sensing method of the cooperative frequency switching network according to claim 5, characterized in that Report the perception and monitoring result to the service base station guard module through the guard network, including any one of the following: Report the perception and monitoring result periodically according to the preset reporting time interval; When the perception and monitoring result reaches the reporting threshold, report the perception and monitoring result to the service base station guard module; When the perception and monitoring result reaches the reporting threshold, report the perception and monitoring result to the service base station guard module, and report the perception and monitoring result periodically according to the preset reporting time interval until the perception and monitoring result is less than the reporting threshold and then stop reporting the perception and monitoring result.

8. A spectrum sensing device for a collaborative frequency switching network of a service base station node, which is used to implement the spectrum sensing method of the collaborative frequency switching network described in any one of claims 1 to 4, and is characterized in that, Applied to a service base station node, the service base station node includes a service base station and a service base station guard module communicatively connected to the service base station. The service base station can communicatively connect with a service terminal in a service terminal node to form a service network, and the service base station guard module can communicatively connect with a service terminal guard module in the service terminal node to form a guard network; The spectrum sensing device of the cooperative frequency switching network for the service base station node includes: A first generation module, configured to generate a frequency usage situation table for the air interface of the service network according to a network-level cooperative frequency control instruction transmitted in the guard network where it is located. The frequency usage situation table for the air interface of the service network can determine a frequency set to be sensed, and the frequency set to be sensed includes at least the frequency point currently used by the air interface of its own service network; A second generation module, configured to generate a spectrum sensing control instruction according to the frequency usage situation table for the air interface of the service network, and spread the spectrum sensing control instruction through the guard network. The service terminal guard module can perceive and monitor the air interface of the service network according to the spectrum sensing control instruction and the frequency set to be sensed; A first sensing module, configured to perceive and monitor the air interface of the service network according to the frequency set to be sensed.

9. A spectrum sensing device for a cooperative frequency switching network of a service terminal node, which is used to implement the spectrum sensing method of the cooperative frequency switching network described in any one of claims 5 to 7, and is characterized in that, Applied to a service terminal node, the service terminal node includes a service terminal and a service terminal guard module communicatively connected to the service terminal. The service terminal can communicatively connect with a service base station in a service base station node to form a service network, and the service terminal guard module can communicatively connect with a service base station guard module in the service base station node to form a guard network; The spectrum sensing device of the collaborative frequency switching network for the service terminal node includes: a receiving module, configured to receive a spectrum sensing control instruction sent by the service base station guard module, where the service base station guard module can generate a service network air interface frequency usage situation table according to the network-level collaborative frequency control instruction transmitted in the guarded network, and the service network air interface frequency usage situation table is used to determine a set of frequencies to be sensed, and the set of frequencies to be sensed at least includes the frequency points currently used by the air interface of its own service network; a second sensing module, configured to sense and monitor the service network air interface according to the spectrum sensing control instruction and the set of frequencies to be sensed, and obtain a sensing and monitoring result; a reporting module, configured to report the sensing and monitoring result to the service base station guard module through the guarded network.

10. A communication system, characterized in that, including: a service base station node and a service terminal node communicatively connected to the service base station node; the service base station node includes a service base station and a service base station guard module communicatively connected to the service base station, and the service base station guard module includes the spectrum sensing device of the collaborative frequency switching network for the service base station node as claimed in claim 8; the service terminal node includes a service terminal and a service terminal guard module communicatively connected to the service terminal, and the service terminal guard module includes the spectrum sensing device of the collaborative frequency switching network for the service terminal node as claimed in claim 9; the service base station is communicatively connected to the service terminal to form a service network, and the service base station guard module and the service terminal guard module are communicatively connected to form a guarded network.

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