Joint spectrum sensing method and device and communication system

Abstract

The invention relates to the technical field of wireless communication, and particularly discloses a joint spectrum sensing method and device and a communication system, and the method comprises the steps: receiving a first sensing parameter indication message sent by a service base station guard module; sensing a frequency point where the current air interface frequency is located at each uplink time-frequency resource according to whether a sending signal of the service terminal exists or not, and obtaining a service base station spectrum sensing result; and sending the service base station spectrum sensing result to a service base station guard module. According to the joint spectrum sensing method provided by the invention, the situation information of the node-level air interface spectrum of the service network can be obtained, and a basis is provided for refined frequency management scheduling of the service network, so that frequency switching can be assisted to avoid interference when existence of interference is determined, and the anti-interference capability of a communication system can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a joint spectrum sensing method, a joint spectrum sensing device on a service base station side, a joint spectrum sensing device on a service terminal side, 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 achieve situational awareness 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 joint spectrum sensing method, a joint spectrum sensing device on a service base station side, a joint spectrum sensing device on a service terminal side, and a communication system, which solve the problem of lack of spectrum situation awareness of cellular network air interfaces in related technologies.

[0005] As a first aspect of the present invention, a joint spectrum sensing method 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 joint spectrum sensing method includes: Receive a first perception parameter indication message sent by a service base station guard module, wherein the service base station guard module can determine a frequency point to be perceived and a current air interface frequency of the service base station, and send the frequency point to be perceived and the current air interface frequency of the service base station to the service terminal guard module through a guard network, wherein the frequency point to be perceived at least includes a frequency point where the current air interface frequency of the service base station is located; Sense the frequency point where the current air interface frequency is located in each uplink time-frequency resource according to the presence or absence of the transmission signal of the service terminal, and obtain the spectrum sensing result of the service base station. Among them, the service terminal can sense the frequency point where the current air interface frequency is located in each downlink time-frequency resource according to the presence or absence of the downlink reference signal sent by the service base station and obtain the spectrum sensing result of the service terminal; the service base station guard module can sense the other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed, and obtain the spectrum sensing result of the service base station guard module; the service terminal guard module can sense the other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed, and obtain the spectrum sensing result of the service terminal guard module; Send the spectrum sensing result of the service base station to the service base station guard module.

[0006] Further, sensing the frequency point where the current air interface frequency is located in each uplink time-frequency resource according to the presence or absence of the transmission signal of the service terminal, and obtaining the spectrum sensing result of the service base station, includes: Judge whether there is a transmission signal of the service terminal, and the transmission signal of the service terminal at least includes an uplink reference signal; If there is no transmission signal of the service terminal, measure the air interface background noise of the current air interface frequency in the current uplink time-frequency resource, and obtain the spectrum sensing result of the service base station according to the background noise measurement result; If there is a transmission signal of the service terminal, measure the channel quality of the current air interface frequency according to the uplink reference signal of the service terminal in the current uplink time-frequency resource, and obtain the spectrum sensing result of the service base station according to the channel quality of the current air interface frequency.

[0007] Further, The first sensing parameter indication message at least includes a sensing granularity and a sensing result reporting period; Sending the spectrum sensing result of the service base station to the service base station guard module includes: Periodically send the spectrum sensing result of the service base station to the service base station guard module according to the sensing granularity and the sensing result reporting period.

[0008] Further, the joint spectrum sensing method further includes: The service base station guard module can receive the spectrum sensing result of the service terminal and the spectrum sensing result of the service terminal guard module reported by the service terminal guard module; and can generate spectrum situation information according to the spectrum sensing result of the service base station, the spectrum sensing result of the service base station guard module, the spectrum sensing result of the service terminal, and the spectrum sensing result of the service terminal guard module, and spread the spectrum situation information to the guard network.

[0009] As another aspect of the present invention, a joint spectrum sensing method is provided, which is 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 be communicatively connected to a service base station in a 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 joint spectrum sensing method includes: Receiving a second sensing parameter indication message sent by the service terminal guard module. The service terminal guard module can receive the frequency points to be sensed and the current air interface frequency of the service base station sent by the service base station guard module, where the frequency points to be sensed at least include the frequency point where the current air interface frequency of the service base station is located; Sensing the frequency point where the current air interface frequency is located in each downlink time-frequency resource according to whether there is a downlink reference signal of the service base station to obtain a service terminal spectrum sensing result. Wherein, the service base station can sense the frequency point where the current air interface frequency is located in each uplink time-frequency resource according to whether there is a transmission signal of the service terminal and obtain a service base station spectrum sensing result; the service terminal guard module can sense other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed and obtain a service terminal guard module spectrum sensing result, and the service base station guard module can sense other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed and obtain a service base station guard module spectrum sensing result; Sending the service terminal spectrum sensing result to the service terminal guard module, and the service terminal guard module can send the service terminal spectrum sensing result and the service terminal guard module spectrum sensing result to the service base station guard module.

[0010] Further, sensing the frequency point where the current air interface frequency is located in each downlink time-frequency resource according to whether there is a downlink reference signal of the service base station to obtain a service terminal spectrum sensing result includes: Judging whether there is a downlink reference signal of the service base station; If there is no downlink reference signal of the service base station, no action is taken; If there is a downlink reference signal of the service base station, measure the channel quality of the current air interface frequency according to the downlink reference signal of the service base station in the current downlink time-frequency resource, and obtain a service terminal spectrum sensing result according to the channel quality of the current air interface frequency.

[0011] Further, The second sensing parameter indication message at least includes a sensing granularity and a sensing result reporting period, and the service terminal guard module can generate the second sensing parameter indication message according to the first sensing parameter indication message sent by the service base station guard module; Send the service terminal spectrum sensing result to the service terminal guard module, including: Periodically send the first service terminal spectrum sensing result to the service terminal guard module according to the sensing granularity and the sensing result reporting period.

[0012] As another aspect of the present invention, there is provided a joint spectrum sensing device on the service base station side, which 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 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. 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 joint spectrum sensing device on the service base station side includes: A first receiving module, configured to receive a first sensing parameter indication message sent by the service base station guard module. The service base station guard module can determine the frequency points to be sensed and the current air interface frequency of the service base station, and send the frequency points to be sensed and the current air interface frequency of the service base station to the service terminal guard module through the guard network, where the frequency points to be sensed at least include the frequency point where the current air interface frequency of the service base station is located; A first sensing module, which senses the frequency point where the current air interface frequency is located for each uplink time-frequency resource according to whether there is a transmission signal of the service terminal, and obtains the service base station spectrum sensing result. The service terminal can sense the frequency point where the current air interface frequency is located for each downlink time-frequency resource according to whether there is a downlink reference signal sent by the service base station and obtain the service terminal spectrum sensing result. The service base station guard module can sense the other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed, and obtain the service base station guard module spectrum sensing result. The service terminal guard module can sense the other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed, and obtain the service terminal guard module spectrum sensing result; A first sending module, configured to send the service base station spectrum sensing result to the service base station guard module.

[0013] As another aspect of the present invention, there is provided a joint spectrum sensing device on the service terminal side, which is 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 be communicatively connected to a service base station in the service base station node to form a service network. 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 joint spectrum sensing device on the service terminal side includes: A second receiving module, configured to receive a second sensing parameter indication message sent by a service terminal guard module, where the service terminal guard module is capable of receiving a to-be-sensed frequency point and a current air interface frequency of a service base station sent by a service base station guard module, and the to-be-sensed frequency point at least includes the frequency point where the current air interface frequency of the service base station is located; A second sensing module, configured to sense the frequency point where the current air interface frequency is located in each downlink time-frequency resource according to whether there is a downlink reference signal of a service base station, and obtain a service terminal spectrum sensing result. Wherein, the service base station can sense the frequency point where the current air interface frequency is located in each uplink time-frequency resource according to whether there is a transmission signal of a service terminal, and obtain a service base station spectrum sensing result; the service terminal guard module can sense other frequency points except the frequency point where the current air interface frequency of the service base station is located in the to-be-sensed frequency points, and obtain a service terminal guard module spectrum sensing result, and the service base station guard module can sense other frequency points except the frequency point where the current air interface frequency of the service base station is located in the to-be-sensed frequency points, and obtain a service base station guard module spectrum sensing result; A second sending module, configured to send the service terminal spectrum sensing result to the service terminal guard module, and the service terminal guard module can send the service terminal spectrum sensing result and the service terminal guard module spectrum sensing result to the service base station guard module.

[0014] As another aspect of the present invention, there is provided a communication system, 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 includes the joint spectrum sensing device on the service base station side described above; The service terminal node includes a service terminal and a service terminal guard module communicatively connected to the service terminal, and the service terminal includes the joint spectrum sensing device on the service terminal side described above; 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 guard network.

[0015] The joint spectrum sensing method provided by the present invention synchronizes time between the service base station and the service base station guard module. The service base station obtains the frequency points to be sensed sent by the service base station guard module and the current air interface frequency of the service base station. The service base station can sense the current air interface frequency of the service base station, and the service base station guard module can sense the other frequency points in the frequency points to be sensed except the frequency point where the current air interface frequency is located, so as to obtain the situation information of the air interface spectrum of the service base station node, provide a basis for the refined frequency management and scheduling of the service network, and finally the spectrum sensing results are all converged to the service base station guard module, so that the situation recognition of the air interface spectrum of the cellular network can be realized through spectrum sensing, so as to assist in frequency switching to avoid interference when it is determined that there is interference, and further effectively improve the anti-interference ability of the communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 It is a structural block diagram of the communication system provided by the present invention.

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

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

[0020] Figure 4 It is a structural block diagram of the joint spectrum sensing device on the service base station side provided by the present invention.

[0021] Figure 5 It is a flowchart of the joint spectrum sensing method applied to the service base station node provided by the present invention.

[0022] Figure 6 It is a structural block diagram of the joint spectrum sensing device on the service terminal side provided by the present invention.

[0023] Figure 7 It is a flowchart of the joint spectrum sensing method applied to the service terminal node provided by the present invention.

[0024] Figure 8 It is a communication schematic diagram of the service base station node and the service terminal node in the communication system provided by the present invention.

[0025] Figure 9 It is a schematic diagram of the uplink and downlink time slots and flexible time slot configuration in the service network provided by the present invention.

[0026] Figure 10Schematic diagram of the transceiver control timing on the service base station side provided by the present invention.

[0027] Figure 11 Schematic diagram of the transceiver control timing on the service terminal side provided by the present invention. Detailed implementation manners

[0028] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0029] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below 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 the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0030] 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 "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily need to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0031] 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.

[0032] Based on this, in the embodiments of the present invention, a communication system 10 is provided, as Figure 1 shown, including 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.

[0033] 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, and form a guard network.

[0034] 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, supports interconnection and interoperability with the service base station guard module and other service terminal guard modules, and forms a guard network.

[0035] In addition, the service network is mainly a wireless communication network composed of service base stations and service terminals, used for service bearing, such as 4G cellular networks, 5G cellular networks, etc.; the guard network is mainly composed of service base station guard modules and service terminal guard modules, and is mainly used to provide the guard ability of collaborative frequency switching for service base stations or service terminals to avoid interference.

[0036] It should be understood that in the embodiments of the present invention, the service terminal deploys a service terminal guard module, constructs a guard network with the service base station guard module deployed on the service base station. The service terminal guard module receives a network collaborative frequency switching instruction from the service base station guard module. This instruction notifies the occurrence time and target frequency point of the frequency change of the service terminal node. The service terminal guard module assists the service terminal in switching the radio 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, 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, cellular network collaborative frequency switching can be realized to avoid interference.

[0037] It should be noted that when the service terminal does not deploy a terminal guard module, the frequency of the service terminal needs to implement initial frequency determination and frequency switching through the standard 3GPP protocol. Since the 3GPP protocol itself has the problem of poor anti-interference ability, therefore, in the communication system provided by the present invention, by deploying a service terminal guard module on the service terminal and a service base station guard module on the service base station, the service terminal guard module and the service base station guard module can assist the service base station and the service terminal in synchronously changing the working frequency to achieve network collaborative frequency change. At the same time, the service terminal guard module deployed on the service terminal side interacts with different service base station guard modules and assists the service terminal in selecting the best cell for handover based on communication measurement results, so as to ensure that the entire communication network has a strong anti-interference ability and realize the fast handover of the terminal device when moving at the cell edge, and avoid service interruption of the terminal device during cell handover.

[0038] In the embodiments of the present invention, as Figure 2As shown, the service base station 110 is communicatively connected to the service base station guard module 120 through a radio frequency interface. The service base station guard module 120 can convert the operating frequency of the service base station 110 and emit it at the service air interface of the service base station guard 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 guard module 120 can send a timing signal to the service base station 110, and the time of the service base station guard module 120 is synchronized with the guard network.

[0039] 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 converted by the auxiliary frequency switching unit of the service base station guard module 120 and then emitted at the service air interface of the service base station guard module 120 (air interface frequency). The signal (air interface frequency) received at the service air interface of the service base station guard module is 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 controlled and determined by the service base station guard module.

[0040] In the embodiment of the present invention, the time synchronization signal of the service base station comes from the service base station guard module. The guard networks formed by the communication units 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 an external synchronization interface.

[0041] As Figure 3 shown, the service terminal 210 is communicatively connected to the service terminal guard module 220 through a radio frequency interface. The service terminal guard module 220 can convert the operating frequency of the service terminal 210 and emit it at the service air interface of the service terminal guard module 220, and can also 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 local guard network.

[0042] Specifically, the service terminal node consists of a service terminal and a service terminal guard module. The service terminal is interconnected with the service RF interface of the service terminal guard module through an RF 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 RF interface of the service terminal via the service RF 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.

[0043] In the embodiment 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 guard network formed by the communication unit with its affiliated service base station guard module.

[0044] Therefore, in the embodiment 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, the entire communication system can form a unified timing reference.

[0045] 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.

[0046] 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 can also provide a guaranteed communication service when the service network is interrupted.

[0047] The auxiliary frequency switching unit 223 is used to assist the external device (service base station / service terminal) connected to the service RF 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.

[0048] The spectrum sensing unit 224 is used to sense and monitor the air interface spectrum situation under the control of the intelligent control unit; The clock unit 225 can support providing synchronous timing services for external devices through the timing interface; meanwhile, 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.

[0049] The intelligent control unit 221 obtains the radio interface spectrum situation of its own module through the spectrum sensing unit, shares and exchanges the spectrum situations of each other with other modules through the communication unit, forms a collaborative frequency usage strategy, and generates specific radio interface frequency change moments and specific frequency point numbers to be used based on this frequency usage strategy, and spreads them to the intelligent control units of other modules through the communication unit to control the auxiliary frequency switching unit to synchronously switch frequencies, realizing real-time changes in the radio interface frequency of the service network and avoiding interference; the intelligent control unit can also perform collaborative control on the analog base station and the terminal through the control interface.

[0050] The service radio interface is specifically represented as the input / output interface of the service network radio interface frequency, that is, the actual radio interface of the service network; the guard radio interface is specifically represented as the radio interface of the guard network, which is multiplexed by the communication unit and the spectrum sensing unit.

[0051] For the above communication system to achieve interference avoidance, it is necessary to perform spectrum sensing on the service network radio interface to achieve interference avoidance when it is determined that there is interference. Therefore, in order to sense the spectrum situation of the service radio interface, the service base station at least includes a joint spectrum sensing device on the service base station side.

[0052] In the embodiment of the present invention, the service base station can sense the current radio interface frequency of the service base station, and the guard module of the service base station can sense other frequency points except the frequency point where the current radio interface frequency is located among the frequency points to be sensed, so as to obtain the situation information of the service base station node radio interface spectrum, provide a basis for the refined frequency management and scheduling of the service network, and the final spectrum sensing results are all converged to the guard module of the service base station, so that the situation recognition of the cellular network radio interface spectrum can be realized through spectrum sensing, so as to assist in frequency switching to avoid interference when it is determined that there is interference, and further effectively improve the anti-interference ability of the communication system.

[0053] Correspondingly, the service terminal can sense the current radio interface frequency of the service terminal, and the guard module of the service terminal can sense other frequency points except the frequency point where the current radio interface frequency is located among the frequency points to be sensed, so as to obtain the situation information of the service terminal node radio interface spectrum, provide a basis for the refined frequency management and scheduling of the service network, and the final spectrum sensing results are all converged to the guard module of the service base station, so that the situation recognition of the cellular network radio interface spectrum can be realized through spectrum sensing, so as to assist in frequency switching to avoid interference when it is determined that there is interference, and further effectively improve the anti-interference ability of the communication system.

[0054] As another embodiment of the present invention, a joint spectrum sensing device on the service base station side is provided for implementing the joint spectrum sensing method described below; as Figure 4 shown, the joint spectrum sensing device 300 on the service base station side includes: A first receiving module 310, configured to receive a first sensing parameter indication message sent by a service base station guard module, where the service base station guard module can determine the frequency points to be sensed and the current air interface frequency of the service base station, and send the frequency points to be sensed and the current air interface frequency of the service base station to a service terminal guard module through a guard network, where the frequency points to be sensed at least include the frequency point where the current air interface frequency of the service base station is located; A first sensing module 320, configured to sense the frequency point where the current air interface frequency is located for each uplink time-frequency resource according to whether there is a transmission signal of a service terminal, and obtain a service base station spectrum sensing result. Wherein, the service terminal can sense the frequency point where the current air interface frequency is located for each downlink time-frequency resource according to whether there is a downlink reference signal sent by the service base station and obtain a service terminal spectrum sensing result; the service base station guard module can sense other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed, and obtain a service base station guard module spectrum sensing result; the service terminal guard module can sense other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed, and obtain a service terminal guard module spectrum sensing result; A first sending module 330, configured to send the service base station spectrum sensing result to the service base station guard module.

[0055] In the embodiment of the present invention, the service base station establishes time synchronization with the service base station guard module. The service base station receives the sensing parameter indication message sent by the service base station guard module. The service base station can sense the current air interface frequency of the service base station. The service base station guard module can sense other frequency points except the frequency point where the current air interface frequency is located among the frequency points to be sensed, so as to obtain the situation information of the air interface spectrum of the service base station node, provide a basis for refined frequency management and scheduling of the service network, and the final spectrum sensing results are all aggregated to the service base station guard module, so as to realize the situation recognition of the air interface spectrum of the cellular network through spectrum sensing, so as to assist in frequency switching to avoid interference when it is determined that there is interference, and thus effectively improve the anti-interference ability of the communication system.

[0056] As another embodiment of the present invention, a joint spectrum sensing method is provided, which is applied to a service base station node, Figure 5 is a flowchart of the joint spectrum sensing method provided according to the embodiment of the present invention, as Figure 5As shown in the figure, the joint spectrum sensing method includes: S110. Receive a first sensing parameter indication message sent by a service base station guard module. The service base station guard module can determine the frequency points to be sensed and the current air interface frequency of the service base station, and send the frequency points to be sensed and the current air interface frequency of the service base station to the service terminal guard module through the guard network, where the frequency points to be sensed at least include the frequency point where the current air interface frequency of the service base station is located; In an embodiment of the present invention, the service base station guard module can determine the frequency points to be sensed according to the configuration. The frequency points to be sensed can specifically be the frequency points to be sensed that can be used as the air interface frequency of the service network in the communication system, and of course include the frequency point where the current air interface frequency of the service base station is located. Here, the frequency point where the current air interface frequency of the service base station is located is the frequency point where the air interface frequency of its own service network is located. The sensing of the frequency point where the current air interface frequency of the service base station is located is specifically performed directly by the service base station, and the other frequency points in the frequency points to be sensed except the frequency point where the current air interface frequency of the service base station is located are sensed by the service base station guard module. For example, the frequency points to be sensed include F1, F2, F3, F4, and F5. If the frequency point where the current air interface frequency of the service base station is located is F1, the service base station senses the F1 frequency point, and the service base station guard module senses F2, F3, F4, and F5.

[0057] S120. Sense the frequency point where the current air interface frequency is located in each uplink time-frequency resource according to whether there is a transmission signal of the service terminal, and obtain the service base station spectrum sensing result. The service terminal can sense the frequency point where the current air interface frequency is located in each downlink time-frequency resource according to whether there is a downlink reference signal sent by the service base station and obtain the service terminal spectrum sensing result; the service base station guard module can sense the other frequency points in the frequency points to be sensed except the frequency point where the current air interface frequency of the service base station is located and obtain the service base station guard module spectrum sensing result; the service terminal guard module can sense the other frequency points in the frequency points to be sensed except the frequency point where the current air interface frequency of the service base station is located and obtain the service terminal guard module spectrum sensing result; In an embodiment of the present invention, when the service base station senses the current air interface frequency, it can specifically determine the sensing result according to whether there is a transmission signal of the service terminal, sense the frequency point where the current air interface frequency is located in each uplink time-frequency resource, and obtain the service base station spectrum sensing result. The service base station guard module can sense the other frequency points in the frequency points to be sensed except the frequency point where the current air interface frequency of the service base station is located to obtain the service base station guard module spectrum sensing result.

[0058] It should be noted that the air interface frequency of the cell in the uplink direction is frequency-converted by the service base station guard module into the cell operating frequency. Therefore, the service base station only needs to measure the cell operating frequency, which is equivalent to measuring the air interface frequency of the cell.

[0059] It should be understood that in the field of mobile communication, the uplink direction specifically refers to the service terminal transmitting signals and the service base station receiving signals; while the downlink direction specifically refers to the service base station transmitting signals and the service terminal receiving signals.

[0060] S130. Send the service base station spectrum sensing result to the service base station guard module.

[0061] The service base station sends the service base station spectrum sensing result it obtains to the service base station guard module, and the service base station guard module aggregates all spectrum sensing results.

[0062] Therefore, for the joint spectrum sensing method applied to the service base station node provided by the present invention, the service base station establishes time synchronization with the service base station guard module, the service base station receives the sensing parameter indication message sent by the service base station guard module, the service base station can sense the current air interface frequency of the service base station, and the service base station guard module can sense other frequency points in the frequency points to be sensed except the frequency point where the current air interface frequency is located, so as to obtain the situation information of the air interface spectrum of the service base station node, provide a basis for the refined frequency management and scheduling of the service network, and finally all spectrum sensing results are aggregated to the service base station guard module, so that the situation recognition of the air interface spectrum of the cellular network can be realized through spectrum sensing, so as to assist in frequency switching to avoid interference when it is determined that there is interference, and further effectively improve the anti-interference ability of the communication system.

[0063] In the embodiment of the present invention, according to whether there is a transmission signal of the service terminal in each uplink time-frequency resource, the frequency point where the current air interface frequency is located is sensed, and the service base station spectrum sensing result is obtained, including: Judge whether there is a transmission signal of the service terminal, and the transmission signal of the service terminal at least includes an uplink reference signal; If there is no transmission signal of the service terminal, measure the air interface noise floor of the current air interface frequency in the current uplink time-frequency resource, and obtain the service base station spectrum sensing result according to the noise floor measurement result; If there is a transmission signal of the service terminal, measure the channel quality of the current air interface frequency according to the uplink reference signal of the service terminal in the current uplink time-frequency resource, and obtain the service base station spectrum sensing result according to the channel quality of the current air interface frequency.

[0064] It should be understood that the service base station measures the cell air interface frequency using each uplink time-frequency resource: when there is no transmission signal from the service terminal in the uplink time-frequency resource, the background noise of the air interface can be measured; when there is a transmission signal from the service terminal in the uplink time-frequency resource, the air interface interference situation can be measured using the uplink reference signal transmitted by the service terminal, that is, the channel quality of the current air interface frequency is measured.

[0065] In the embodiment of the present invention, the service base station spectrum sensing result can be obtained by the service base station measuring the cell air interface frequency in each uplink time-frequency resource.

[0066] In the embodiment of the present invention, The first sensing parameter indication message at least includes the sensing granularity and the sensing result reporting period; Sending the service base station spectrum sensing result to the service base station guard module includes: Periodically sending the service base station spectrum sensing result to the service base station guard module according to the sensing granularity and the sensing result reporting period.

[0067] It should be understood that before spectrum sensing, the service base station guard module can obtain the air interface parameters of each cell on the service base station through configuration, at least including: working mode (such as TDD, FDD), technical regime (such as LTD, 5G, etc.), subcarrier spacing, uplink and downlink configuration (in TDD mode), air interface radio frame time domain offset (the offset of the air interface radio frame boundary relative to the time reference "whole second"), etc. parameters. The service base station guard module calculates the air interface timing of the service network and the air interface frequency setting of the service network based on the cell air interface parameters.

[0068] Specifically, the air interface timing of the service network can be calculated through the air interface radio frame time domain offset. Additionally, the local oscillator frequency is calculated by taking the difference or sum of the working frequency configured for the air interface and the air interface frequency selected by the service base station guard module itself.

[0069] Before spectrum sensing, the service base station guard module and the service terminal guard module construct an independent guard network. The service terminal guard module maintains time synchronization with its affiliated service base station through the guard network. The service base station guard module provides timing for the service base station through the timing interface, that is, the service base station and the service base station guard module maintain time synchronization.

[0070] In addition, in the embodiments of the present invention, the service base station guard module sends the obtained cell parameters to the service terminal guard module through the "service base station parameter indication message"; the message at least includes: message sequence number, service base station ID, working cell ID, cell working mode, cell technology regime, subcarrier spacing, CP mode, uplink and downlink configuration (in TDD mode), cell working frequency, cell air interface frequency, transmit power, cell air interface frequency effective time, air interface radio frame time domain offset and other parameters.

[0071] The service base station guard module can also spread general sensing parameters to the service terminal guard module through the guard network through the "general sensing parameter indication" message; in addition, the service base station guard module can support sending a "dedicated sensing parameter indication" to a specific service terminal guard module to notify the use of specific sensing parameters, and the message at least includes: "sequence number, service terminal guard module ID, sensing granularity, sensing result reporting period, duration".

[0072] In the embodiments of the present invention, the joint spectrum sensing method further includes: The service base station guard module can receive the service terminal spectrum sensing result and the service terminal guard module spectrum sensing result reported by the service terminal guard module; and can generate spectrum situation information according to the service base station spectrum sensing result, the service base station guard module spectrum sensing result, the service terminal spectrum sensing result and the service terminal guard module spectrum sensing result, and spread the spectrum situation information to the guard network.

[0073] It should be understood that the service base station periodically reports the sensing result to the service base station guard module according to parameters such as the sensing granularity and result reporting period carried in the first sensing parameter indication message.

[0074] For the non-service network air interface frequency on the service base station side, the service base station guard module directly performs spectrum sensing without the participation of the service base station (the service base station is insensitive).

[0075] It should be noted that after the service base station guard module collects the spectrum sensing results reported by each service terminal guard module, it can form global (full geographical area, full frequency domain) spectrum situation information, which provides the possibility for subsequent network collaborative frequency switching to avoid interference and network collaborative frequency scheduling.

[0076] It should also be noted that when multiple service base station nodes are deployed in the network, each service base station guard module maintains time synchronization through the guard network, and each service base station node and its affiliated terminal nodes can complete air interface joint spectrum sensing according to the same process as above; each service base station guard module can collect the service base station guard module-level global spectrum situation information of other service base station guard modules through the guard network, so as to form the global spectrum situation information at the whole network level.

[0077] As another embodiment of the present invention, a joint spectrum sensing device on the service terminal side is provided for implementing the joint spectrum sensing method described below, such as Figure 6 As shown, the joint spectrum sensing device 400 on the service terminal side includes: A second receiving module 410, configured to receive a second sensing parameter indication message sent by a service terminal guard module, where the service terminal guard module is capable of receiving the frequency points to be sensed and the current air interface frequency of the service base station sent by the service base station guard module, and where the frequency points to be sensed include at least the frequency point where the current air interface frequency of the service base station is located; A second sensing module 420, configured to sense the frequency point where the current air interface frequency is located in each downlink time-frequency resource according to the presence or absence of a downlink reference signal of the service base station and obtain a service terminal spectrum sensing result. Wherein, the service base station can sense the frequency point where the current air interface frequency is located in each uplink time-frequency resource according to the presence or absence of a transmission signal of the service terminal and obtain a service base station spectrum sensing result; the service terminal guard module can sense the other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed and obtain a service terminal guard module spectrum sensing result, and the service base station guard module can sense the other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed and obtain a service base station guard module spectrum sensing result; A second sending module 430, configured to send the service terminal spectrum sensing result to the service terminal guard module, and the service terminal guard module can send the service terminal spectrum sensing result and the service terminal guard module spectrum sensing result to the service base station guard module.

[0078] For the joint spectrum sensing device on the service terminal side provided in the embodiment of the present invention, the service terminal establishes time synchronization with the service terminal guard module, the service terminal guard module establishes time synchronization with the service base station guard module through the guard network, the service terminal receives the sensing parameter indication message sent by the service terminal guard module, the service terminal can sense the current air interface frequency of the service base station, and the service terminal guard module can sense the other frequency points except the frequency point where the current air interface frequency is located among the frequency points to be sensed, so as to obtain the situation information of the air interface spectrum of the service terminal node, provide a basis for refined frequency management and scheduling of the service network, and finally the spectrum sensing results are all aggregated to the service base station guard module, so that the situation recognition of the air interface spectrum of the cellular network can be realized through spectrum sensing, so as to be able to perform frequency switching to avoid interference when it is determined that there is interference, and further effectively improve the anti-interference ability of the communication system.

[0079] As another embodiment of the present invention, a joint spectrum sensing method is provided, which is applied to a service terminal node, such as Figure 7As shown, the joint spectrum sensing method includes: S210. Receive a second sensing parameter indication message sent by the service terminal guard module. The service terminal guard module can receive the frequency points to be sensed and the current air interface frequency of the service base station sent by the service base station guard module, where the frequency points to be sensed at least include the frequency point where the current air interface frequency of the service base station is located; In an embodiment of the present invention, the service terminal guard module receives the frequency points to be sensed and the current air interface frequency of the service base station sent by the service base station guard module through the guard network. After the service terminal is started, it senses the current air interface frequency of the service base station, while the service terminal guard module senses other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed.

[0080] S220. Sense the frequency point where the current air interface frequency is located in each downlink time-frequency resource according to whether there is a downlink reference signal of the service base station and obtain the service terminal spectrum sensing result. Among them, the service base station can sense the frequency point where the current air interface frequency is located in each uplink time-frequency resource according to whether there is a transmission signal of the service terminal and obtain the service base station spectrum sensing result; the service terminal guard module can sense other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed and obtain the service terminal guard module spectrum sensing result, and the service base station guard module can sense other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed and obtain the service base station guard module spectrum sensing result; In an embodiment of the present invention, when the service terminal senses the current air interface frequency, it can specifically determine the sensing result according to whether there is a downlink reference signal of the service base station, sense the frequency point where the current air interface frequency is located in each downlink time-frequency resource, and obtain the service terminal spectrum sensing result, while the service terminal guard module can sense other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed to obtain the service terminal guard module spectrum sensing result.

[0081] S230. Send the service terminal spectrum sensing result to the service terminal guard module. The service terminal guard module can send the service terminal spectrum sensing result and the service terminal guard module spectrum sensing result to the service base station guard module.

[0082] The service terminal sends the service terminal spectrum sensing result it obtains to the service terminal guard module. The service terminal guard module can send the service terminal spectrum sensing result and the service terminal guard module spectrum sensing result to the service base station guard module together.

[0083] Therefore, for the joint spectrum sensing method applied to service terminal nodes provided by the present invention, the service terminal establishes time synchronization with the service terminal guard module, the service terminal guard module establishes time synchronization with the service base station guard module through the guard network, the service terminal receives the sensing parameter indication message sent by the service terminal guard module, the service terminal can sense the current air interface frequency of the service base station, and the service terminal guard module can sense other frequency points except the frequency point where the current air interface frequency is located among the frequency points to be sensed, so as to obtain the situation information of the air interface spectrum of the service terminal node, provide a basis for the refined frequency management and scheduling of the service network, and finally all the spectrum sensing results are converged to the service base station guard module, so as to realize the situation recognition of the air interface spectrum of the cellular network through spectrum sensing, so as to assist in frequency switching to avoid interference when it is determined that there is interference, and further effectively improve the anti-interference ability of the communication system.

[0084] Specifically, sensing the frequency point where the current air interface frequency is located in each downlink time-frequency resource according to whether there is a downlink reference signal of the service base station and obtaining the service terminal spectrum sensing result includes: Judging whether there is a downlink reference signal of the service base station; If there is no downlink reference signal of the service base station, no action is taken; If there is a downlink reference signal of the service base station, measure the channel quality of the current air interface frequency according to the downlink reference signal of the service base station in the current downlink time-frequency resource, and obtain the service terminal spectrum sensing result according to the channel quality of the current air interface frequency.

[0085] In the embodiment of the present invention, the service terminal measures the air interface frequency of the cell by using each downlink time-frequency resource: when there is no downlink reference signal of the service base station in the downlink time-frequency resource, no action is taken; when there is a downlink reference signal of the service base station in the downlink time-frequency resource, the air interface interference situation can be measured by using the reference signal sent by the service base station, that is, the channel quality of the current air interface frequency is measured.

[0086] It should be noted that the air interface frequency of the cell in the downlink direction is frequency-converted by the service terminal guard module into the cell operating frequency, so the service terminal only needs to measure the cell operating frequency, which is equivalent to measuring the air interface frequency of the cell.

[0087] In the embodiment of the present invention, The second sensing parameter indication message at least includes the sensing granularity and the sensing result reporting period, and the service terminal guard module can generate the second sensing parameter indication message according to the first sensing parameter indication message sent by the service base station guard module; Sending the service terminal spectrum sensing result to the service terminal guard module includes: Periodically send the first service terminal spectrum sensing result to the service terminal guard module according to the sensing granularity and the sensing result reporting period.

[0088] It should be noted that, as described above, the service base station guard module can send a service base station parameter indication message to the service terminal guard module. After receiving the "service base station parameter indication message", the service terminal guard module calculates the air interface timing of the service network where the service terminal node is located and the air interface frequency setting of the service network, and controls the air interface uplink and downlink timing conversion and air interface frequency timing switching of the service terminal node according to the calculation results.

[0089] In addition to sending a general sensing parameter indication message, the service base station guard module also sends a dedicated sensing parameter indication message to the service terminal guard module. After receiving the dedicated sensing parameter indication message sent to itself, the service terminal guard module will ignore the general sensing parameter indication message until a new dedicated sensing parameter indication message is received or the duration times out; if a new dedicated sensing parameter indication message is received, the new parameters will replace the original parameters; if the duration of the parameters corresponding to the dedicated sensing parameter indication message times out, the parameters in the general sensing parameter indication message will be restored for use.

[0090] Here it should be noted that the general sensing parameter indication message sent by the service base station guard module can specifically be the first sensing parameter indication message, and the first sensing parameter indication message can specifically include the service base station ID number, cell ID number, sensing granularity, and reporting period; when the service terminal guard module receives the first sensing parameter indication message, it can specifically generate a second sensing parameter indication message according to the first sensing parameter indication message, and the second sensing parameter indication message can include the sensing granularity and reporting period. That is to say, the service terminal guard module can generate a second sensing parameter indication message according to the general sensing parameter indication message, and can also generate a second sensing parameter indication message according to the dedicated sensing parameter indication message, that is, when the service terminal guard module receives the dedicated sensing parameter indication message sent to itself, it can generate a second sensing parameter indication message according to the dedicated sensing parameter indication message.

[0091] In addition, the service terminal guard module informs the service terminal of the air interface spectrum sensing parameters of the service network through the second sensing parameter indication message. This message at least includes: "serial number, sensing granularity, sensing result reporting period"; when the service terminal guard module discovers a parameter change (duration timeout or receiving a new "dedicated sensing parameter indication"), it will reconfigure the service terminal.

[0092] For the air interface frequency of the non-service network on the service terminal side, the service terminal guard module directly performs spectrum sensing without the participation of the service terminal (the service terminal is unaware).

[0093] The following describes in detail the specific implementation process of the joint spectrum sensing method provided by the present invention.

[0094] As Figure 8 shown, one cell 1 (ID = 1) is deployed on the service base station, with a working frequency F1. After being frequency-converted by the service base station guard module, the air interface frequency of the service network becomes F1'; the working frequency of the service terminal is F1, and it resides in cell 1.

[0095] The air interface parameters of the cell are: TDD, 5G, normal CP, subcarrier spacing (30 kHz), the time slot configuration period is 5 ms, and the uplink-downlink time slot ratio and flexible time slot configuration are as Figure 9 shown, the uplink-downlink time slot configuration (7 downlink time slots, 2 uplink time slots, 1 flexible time slot), flexible time slot configuration (6 downlink symbols, 4 uplink symbols, 4 guard symbols), and parameters such as the time domain offset of the radio frame (the frame boundary is aligned with the whole second boundary).

[0096] Thus, the service base station guard module can calculate its own transceiver control timing to match the uplink and downlink timing of the service base station, where Tx represents the transmission state and Rx represents the reception state, that is, all guard symbol times are set to the reception state, as Figure 10 shown.

[0097] The service base station guard network sets the air interface spectrum of cell 1 to F1'.

[0098] After the service base station guard module and the service terminal guard module are started, they construct a guard network independent of the service network through the communication unit. The service terminal guard module maintains a time synchronization relationship with the service base station guard module through the guard network, and the service terminal guard module uses the service base station guard module as the synchronization source to periodically perform time synchronization measurement and calibration.

[0099] The service base station guard module provides a second pulse and UTC time information to the service base station through the timing interface for the service base station to calibrate its local clock.

[0100] The service base station guard module will periodically send a "Service Base Station Parameter Indication Message". At the same time, when the service base station detects that a new service terminal guard module has joined the guard network, it will actively inform the service terminal guard module of the cell parameters through a unicast "Service Base Station Parameter Indication Message". The cell parameters include: message sequence number, service base station ID (1), working cell ID (1), cell working mode (TDD), cell technology regime (5G), subcarrier spacing (30 kHz), normal CP, uplink and downlink time slot configuration (7 downlink time slots, 2 uplink time slots, 1 flexible time slot), flexible time slot configuration (6 downlink symbols, 4 uplink symbols, 4 protection symbols), radio frame time domain offset (aligned with the whole second boundary of the frame boundary), cell working frequency (F1), cell air interface frequency (F1'), transmit power (20W), cell air interface frequency effective time (immediately), etc.

[0101] After the service base station starts up normally, the service base station guard module sends a "Sensing Parameter Indication" to the service base station. The composition of this message is as follows: sequence number (201), service base station ID (1), cell ID (1), sensing granularity (5MHz), sensing result reporting period (100ms).

[0102] The service base station guard module broadcasts the "General Sensing Parameter Indication" to each service terminal guard node in the guard network; the service terminal guard module calculates its own transceiver control timing based on the received "Service Base Station Parameter Indication Message" and matches the uplink and downlink timing of the service terminal, where Tx represents the transmission state and Rx represents the reception state, as Figure 11 shown.

[0103] The service terminal guard module sets its own cell air interface frequency to F1'.

[0104] After the service base station starts up normally, the service base station guard module sends a "Sensing Parameter Indication" to the service base station. The composition of this message is as follows: sequence number (201), service base station ID (1), cell ID (1), sensing granularity (5MHz), sensing result reporting period (100ms).

[0105] The service terminal guard module informs the service terminal of the air interface spectrum sensing parameters of the service network through the "Sensing Parameter Indication" message with the received valid sensing parameters. This message shall at least include: "sequence number, sensing granularity, sensing result reporting period"; when the service terminal guard module detects parameter changes (continuous duration timeout or receiving a new "Dedicated Sensing Parameter Indication"), it will reconfigure the service terminal.

[0106] The service base station measures the cell air interface frequency in each uplink time slot: The service base station divides the cell operating frequency into multiple non - overlapping sub - bands according to the sensing granularity. For each sub - band, if there is no uplink scheduling, it measures the received signal strength of the sub - band as the background noise; otherwise, it measures the signal strength and signal - to - noise ratio of the received signal according to the uplink pilot. The service terminal measures the cell air interface frequency in each downlink time slot: The service terminal divides the cell operating frequency into multiple non - overlapping sub - bands according to the sensing granularity. For each sub - band, if there is no downlink reference signal transmission, it takes no action; otherwise, it measures the signal strength and signal - to - noise ratio of the received signal according to the downlink reference signal. The service base station frames and reports the sensing results according to the reporting period indicated by the sensing parameters. The reported content includes: serial number, background noise information of each sub - band of the cell, sub - band signal strength and signal - to - noise ratio of each service terminal; The service terminal frames and reports the sensing results according to the reporting period indicated by the sensing parameters. The reported content includes: serial number, background noise information of each sub - band of the cell, sub - band signal strength and signal - to - noise ratio of the cell.

[0107] For the effective frequencies other than F1’, the service base station guard module and the service terminal guard module periodically measure the background noise according to the sensing granularity without going through the service base station and the service terminal.

[0108] When the reporting period arrives, the service terminal guard module aggregates the measured results of the background noise of sub - bands with different frequencies collected by itself and the sub - band signal strength and signal - to - noise ratio of the cell, and reports them to the service base station guard module through the guard network.

[0109] If the service base station guard module finds that there are other service base station guard modules in the guard network, it spreads the global spectrum information collected by itself to other service base station guard modules. To reduce the air interface transmission overhead, it can only transmit the measurement results of the cell air interface frequency.

[0110] In summary, the joint spectrum sensing method provided by the present invention can obtain the situation information of the air interface spectrum at the service network node level through the auxiliary measurement of the service base station and the service terminal, providing a basis for the refined frequency management and scheduling of the service network. Using the control interfaces of the guard module with the base station and the terminal to obtain the sensing and monitoring results of the base station and the terminal for the current air interface frequency can avoid the co - channel interference problem of cellular network services and achieve accurate and reliable monitoring of the global spectrum.

[0111] It can be understood that the above - mentioned embodiments are only 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 joint spectrum sensing method, 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 be communicatively connected to a service terminal in a 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 joint spectrum sensing method includes: Receiving a first sensing parameter indication message sent by the service base station guard module, where the service base station guard module can determine the frequency points to be sensed and the current air interface frequency of the service base station, and send the frequency points to be sensed and the current air interface frequency of the service base station to the service terminal guard module through the guard network, where the frequency points to be sensed at least include the frequency point where the current air interface frequency of the service base station is located; Sensing the frequency point where the current air interface frequency is located in each uplink time-frequency resource according to whether there is a transmission signal of the service terminal, and obtaining a service base station spectrum sensing result. Among them, the service terminal can sense the frequency point where the current air interface frequency is located in each downlink time-frequency resource according to whether there is a downlink reference signal sent by the service base station and obtain a service terminal spectrum sensing result; the service base station guard module can sense the other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed, and obtain a service base station guard module spectrum sensing result; the service terminal guard module can sense the other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed, and obtain a service terminal guard module spectrum sensing result; Sending the service base station spectrum sensing result to the service base station guard module.

2. The joint spectrum sensing method according to claim 1, wherein Sensing the frequency point where the current air interface frequency is located in each uplink time-frequency resource according to whether there is a transmission signal of the service terminal, and obtaining a service base station spectrum sensing result, including: Judging whether there is a transmission signal of the service terminal, where the transmission signal of the service terminal at least includes an uplink reference signal; If there is no transmission signal of the service terminal, measure the air interface background noise of the current air interface frequency in the current uplink time-frequency resource, and obtain a service base station spectrum sensing result according to the background noise measurement result; If there is a transmission signal of the service terminal, measure the channel quality of the current air interface frequency according to the uplink reference signal of the service terminal in the current uplink time-frequency resource, and obtain a service base station spectrum sensing result according to the channel quality of the current air interface frequency.

3. The joint spectrum sensing method according to claim 1, characterized in that The first sensing parameter indication message at least includes a sensing granularity and a sensing result reporting period; Sending the service base station spectrum sensing result to the service base station guard module, including: Periodically sending the service base station spectrum sensing result to the service base station guard module according to the sensing granularity and the sensing result reporting period.

4. The joint spectrum sensing method according to claim 3, wherein The joint spectrum sensing method further includes: The service base station guard module is capable of receiving the service terminal spectrum sensing results and the service terminal guard module spectrum sensing results reported by the service terminal guard module; and is capable of generating spectrum situation information based on the service base station spectrum sensing results, the service base station guard module spectrum sensing results, the service terminal spectrum sensing results, and the service terminal guard module spectrum sensing results, and spreading the spectrum situation information to the guard network.

5. A joint spectrum sensing method, 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 communicate with a service base station in a service base station node to form a service network, and the service terminal guard module can communicate with a service base station guard module in the service base station node to form a guard network. The joint spectrum sensing method includes: Receiving a second sensing parameter indication message sent by the service terminal guard module. The service terminal guard module is capable of receiving the frequency points to be sensed sent by the service base station guard module and the current air interface frequency of the service base station, where the frequency points to be sensed include at least the frequency point where the current air interface frequency of the service base station is located. Sensing the frequency point where the current air interface frequency is located in each downlink time-frequency resource according to whether there is a downlink reference signal of the service base station to obtain the service terminal spectrum sensing result. Among them, the service base station can sense the frequency point where the current air interface frequency is located in each uplink time-frequency resource according to whether there is a transmission signal of the service terminal to obtain the service base station spectrum sensing result. The service terminal guard module can sense other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed to obtain the service terminal guard module spectrum sensing result, and the service base station guard module can sense other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed to obtain the service base station guard module spectrum sensing result. Sending the service terminal spectrum sensing result to the service terminal guard module. The service terminal guard module can send the service terminal spectrum sensing result and the service terminal guard module spectrum sensing result to the service base station guard module.

6. The joint spectrum sensing method according to claim 5, wherein Sensing the frequency point where the current air interface frequency is located in each downlink time-frequency resource according to whether there is a downlink reference signal of the service base station to obtain the service terminal spectrum sensing result, including: Judging whether there is a downlink reference signal of the service base station; If there is no downlink reference signal of the service base station, no action is taken; If there is a downlink reference signal of the service base station, measure the channel quality of the current air interface frequency according to the downlink reference signal of the service base station in the current downlink time-frequency resource, and obtain the service terminal spectrum sensing result according to the channel quality of the current air interface frequency.

7. The joint spectrum sensing method according to claim 5, characterized in that The second sensing parameter indication message includes at least a sensing granularity and a sensing result reporting period. The service terminal guard module can generate the second sensing parameter indication message according to the first sensing parameter indication message sent by the service base station guard module. Send the service terminal spectrum sensing result to the service terminal guard module, including: Periodically send the first service terminal spectrum sensing result to the service terminal guard module according to the sensing granularity and the sensing result reporting period.

8. A joint spectrum sensing device on the service base station side, 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 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 joint spectrum sensing device on the service base station side includes: A first receiving module, configured to receive a first sensing parameter indication message sent by the service base station guard module. The service base station guard module can determine the frequency points to be sensed and the current air interface frequency of the service base station, and send the frequency points to be sensed and the current air interface frequency of the service base station to the service terminal guard module through the guard network, where the frequency points to be sensed at least include the frequency point where the current air interface frequency of the service base station is located; A first sensing module, configured to sense the frequency point where the current air interface frequency is located for each uplink time-frequency resource according to whether there is a transmission signal of a service terminal, and obtain a service base station spectrum sensing result. Among them, the service terminal can sense the frequency point where the current air interface frequency is located for each downlink time-frequency resource according to whether there is a downlink reference signal sent by the service base station and obtain a service terminal spectrum sensing result; the service base station guard module can sense the other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed, and obtain a service base station guard module spectrum sensing result; the service terminal guard module can sense the other frequency points except the frequency point where the current air interface frequency of the service base station is located among the frequency points to be sensed, and obtain a service terminal guard module spectrum sensing result; A first sending module, configured to send the service base station spectrum sensing result to the service base station guard module.

9. A joint spectrum sensing device on the service terminal side, 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 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 joint spectrum sensing device on the service terminal side includes: A second receiving module, configured to receive a second sensing parameter indication message sent by the service terminal guard module. The service terminal guard module can receive the frequency points to be sensed and the current air interface frequency of the service base station sent by the service base station guard module, where the frequency points to be sensed at least include the frequency point where the current air interface frequency of the service base station is located; A second sensing module, configured to sense a frequency point where the current air interface frequency is located in each downlink time-frequency resource according to the presence or absence of a downlink reference signal of a service base station, and obtain a spectrum sensing result of a service terminal. The service base station can sense a frequency point where the current air interface frequency is located in each uplink time-frequency resource according to the presence or absence of a transmission signal of a service terminal, and obtain a spectrum sensing result of the service base station. The service terminal guard module can sense other frequency points in the frequency points to be sensed except the frequency point where the current air interface frequency of the service base station is located, and obtain a spectrum sensing result of the service terminal guard module. The service base station guard module can sense other frequency points in the frequency points to be sensed except the frequency point where the current air interface frequency of the service base station is located, and obtain a spectrum sensing result of the service base station guard module. A second transmission module, configured to send the spectrum sensing result of the service terminal to the service terminal guard module, and the service terminal guard module can send the spectrum sensing result of the service terminal and the spectrum sensing result of the service terminal guard module to the service base station guard module.

10. A communication system, characterized in that, Comprising: 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. The service base station includes the joint spectrum sensing device on the service base station side 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. The service terminal includes the joint spectrum sensing device on the service terminal side 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 guard network.

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