A method and system for fast frequency adjustment based on minimum change and conflict resolution

Abstract

The application discloses a frequency adjustment method and system based on minimum change and conflict resolution, and relates to the technical field of electromagnetic spectrum management and control. The method comprises the following steps: grouping devices according to device working frequency bands; receiving frequency spectrum interference information reported by devices, and performing frequency spectrum interference detection between all devices in the group where the interference reporting device is located; according to the interference detection result, reassigning conflict-free frequency points to each device by using a priority allocation strategy; and determining a frequency adjustment scheme, wherein only the frequency point of the interference reporting device is adjusted. The application is a method for changing the current frequency point of a frequency using device as little as possible, and quickly calculating frequency spectrum interference and generating a frequency adjustment scheme.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic spectrum management technology, specifically to a method and system for rapid frequency adjustment based on minimal change and conflict resolution. Background Technology

[0002] When multiple non-co-located frequency-using devices operate simultaneously, spectral interference often occurs. This is because the spectral spacing between the devices is too small, requiring adjustment of the spectral spacing to eliminate interference and ensure the full performance of the devices. Since the spectral interference state between devices changes after frequency adjustment, it is necessary to calculate the spectral interference state based on the current spacing between each device before adjustment, and to rationally plan the frequency spacing to ensure both no spectral interference occurs between devices and sufficient available frequency points for each device.

[0003] Therefore, there is an urgent need for a frequency adjustment method that can minimize frequency changes and improve adjustment efficiency while ensuring interference elimination. Summary of the Invention

[0004] This invention provides a method and system that minimizes changes to the current operating frequency of frequency-using equipment and enables rapid calculation of spectral interference and generation of frequency adjustment schemes. Only the current operating frequency of the reporting spectral interference equipment is changed, while the operating frequencies of other equipment remain unchanged, minimizing the change in the current operating frequency of the entire frequency-using equipment. Furthermore, based on the equipment grouping method, spectral interference calculation and frequency adjustment are performed only on equipment within the group, thus accelerating the frequency adjustment time.

[0005] In a first aspect, the present invention provides a method for rapid frequency adjustment based on minimal change and conflict resolution, comprising: Group the devices according to their operating frequency bands; Receive spectrum interference information reported by the receiving device and perform pairwise spectrum interference detection on all devices in the group to which the reporting interfering device belongs; Based on the interference detection results, a priority allocation strategy is used to reallocate conflict-free frequency points to each device; A frequency adjustment plan was determined, which only adjusted the frequency points of the reported interference devices.

[0006] In some instances, the spectrum interference detection includes bidirectional interference determination, which calculates the interference power of device A to device B and the interference power of device B to device A, respectively. If the interference power in either direction exceeds the sensitivity threshold of the receiving device, interference is determined to exist.

[0007] In some instances, the interference power is: ,in, For transmission power, For the transmit antenna gain, Here, c represents the receiving antenna gain, and c represents the speed of light. f R is the receiving frequency, R is the distance between devices, and L is the sideband suppression attenuation.

[0008] In some instances, the priority allocation strategy includes: Prioritize reserving the currently used frequency points for devices that have not reported interference; Set the priority of reporting interference devices to the highest level; The minimum conflict-free frequency point is selected from the available frequency points and allocated according to priority.

[0009] In some instances, the grouping is based on the operating frequency band of the devices, with overlapping or similar operating frequency bands for devices in the same group, and the interval between operating frequency bands of devices in different groups being greater than a preset threshold.

[0010] Secondly, the present invention provides a frequency adjustment system based on minimum variation and conflict resolution, comprising: The group management module is used to group devices according to their operating frequency bands; The interference reporting module is used to receive spectrum interference information reported by the device; The interference calculation module is used to perform pairwise spectral interference detection on all devices within the group of the reported interference device. The frequency allocation module is used to reallocate conflict-free frequency points to each device based on the interference detection results and a priority allocation strategy. The scheme output module is used to determine the frequency adjustment scheme, which only adjusts the frequency points of the reported interference devices.

[0011] In some instances, the spectrum interference detection includes bidirectional interference determination, which calculates the interference power of device A to device B and the interference power of device B to device A, respectively. If the interference power in either direction exceeds the sensitivity threshold of the receiving device, interference is determined to exist.

[0012] In some instances, the interference power is: ,in, For transmission power, For the transmit antenna gain, Here, c represents the receiving antenna gain, and c represents the speed of light. f R is the receiving frequency, R is the distance between devices, and L is the sideband suppression attenuation.

[0013] In some instances, the priority allocation strategy includes: Prioritize reserving the currently used frequency points for devices that have not reported interference; Set the priority of reporting interference devices to the highest level; The minimum conflict-free frequency point is selected from the available frequency points and allocated according to priority.

[0014] In some instances, the grouping is based on the operating frequency band of the devices, with overlapping or similar operating frequency bands for devices in the same group, and the interval between operating frequency bands of devices in different groups being greater than a preset threshold.

[0015] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects: By only changing the current operating frequency of the device reporting spectrum interference, while keeping the operating frequencies of other devices unchanged, the change in the current operating frequency of the entire frequency-using device is minimized. Furthermore, based on the device grouping method, spectrum interference calculations and frequency adjustments are only performed on devices within the group, thus speeding up the frequency adjustment time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart illustrating the frequency adjustment method based on minimum change and conflict resolution provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the frequency adjustment system based on minimum change and conflict resolution provided in an embodiment of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the following description, specific embodiments of the invention will be illustrated with reference to steps and symbols performed by one or more computers, unless otherwise stated. Therefore, these steps and operations will be referred to several times as being performed by a computer, and computer execution as referred to herein includes operations by a computer processing unit representing electronic signals of data in a structured format. This operation transforms the data or maintains it at a location in the computer's memory system, which can be reconfigured or otherwise alter the operation of the computer in a manner well known to those skilled in the art. The data structure maintained by the data is the physical location of the memory, which has specific characteristics defined by the data format. However, the principles of the invention described above are not intended to be limiting, and those skilled in the art will understand that many of the following steps and operations can also be implemented in hardware.

[0020] The terms "module" or "unit" as used herein can be considered as software objects executing on the computing system. Different components, modules, engines, and services described herein can be considered as implementations on the computing system. The apparatus and methods described herein are preferably implemented in software, but can also be implemented in hardware, both of which are within the scope of this invention.

[0021] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0022] In this embodiment of the invention, a method for rapid frequency adjustment based on minimal change and conflict resolution is provided. For example... Figure 1 As shown, the specific process is as follows: When frequency-using equipment experiences spectral interference, it is manually reported to the electromagnetic spectrum management software via the frequency interference reporting interface. Upon receiving the interference report, the frequency management software performs interference diagnosis and generates a frequency adjustment plan. The specific steps are as follows: Step 1: Group all frequency-using devices according to frequency bands. When the frequency of a device changes, it will affect the spectrum usage of devices in the same group. However, because the operating frequency sets of devices in different groups are far apart, there is no spectrum interference between devices in different groups.

[0023] Step 2: The spectrum management software receives spectrum interference information reported by a device. Based on the distance to the device currently using the frequency, the software calculates the spectrum interference for all devices in the same group as that device. The calculation method uses the electromagnetic interference equation. For example, if the distance between device A and device B is R, and device A has 10 operating frequency points while device B has 15, the software iterates through the frequency points of device A. First, it calculates the spectrum interference between the first frequency point A1 of device A and device B. There are three possibilities regarding A1 and device B's operating frequency set: First, if A1 is higher than all operating frequencies of device B, then it first calculates whether there is a spectrum conflict between B15 and A1. The calculation method is as follows: (1) Calculate the radiated power density S at point B when A emits at frequency A1:

[0024] Among them, P A Let G be the transmission power of A. A Let P be the antenna gain of A in the direction of B. The interference power P received by the sensitive device's antenna. r for:

[0025] A r The effective receiving area of ​​the receiving antenna of device B can be expressed as:

[0026] λ r For the wavelength received by device B, G B Let λ be the receiving antenna gain of device B. r Represented as:

[0027] c is the speed of light. A emits at frequency A1 and frequency B... 15 If the sideband suppression is L, then the interference power at the receiving frequency is:

[0028] The sensitivity level of B is S B If P r >S B Then A launches from A1, and B launches from B. 15 When receiving signals, there is spectral interference between the two; conversely, there is no spectral interference when receiving signals from different locations.

[0029] (2) Calculate the spectral interference when B transmits and A receives. The radiation power density S at point A when B is emitted is calculated as follows:

[0030] Among them, P B For the transmission power of B, G B Let B be the antenna gain in the direction of A. Let P be the interference power received by the sensitive device's antenna. r for:

[0031] A r The effective receiving area of ​​the receiving antenna of device A can be expressed as:

[0032] λ r For device A to receive wavelength, G A Let λ be the receiving antenna gain of device A, where λ is the λ' ... r Represented as:

[0033] c is the speed of light. B is expressed in terms of frequency B. 15 If the sideband suppression at the transmit frequency A1 is L, then the interference power at the receive frequency is:

[0034] The sensitivity level of A is S A If P r >S A Then A receives with A1, and B receives with B. 15 There is spectral interference between the two during transmission; otherwise, there is no spectral interference.

[0035] (3) When the above calculation results indicate that there is no spectral interference, the operating frequency of device A is A1 and the operating frequency of device B is B. 15 There is no spectral interference; otherwise, there is spectral interference.

[0036] (4) If A1 and B 15 If there is no spectral interference, then there is no spectral interference between A1 and device B at any frequency point; if A1 and B 15 If spectral interference exists, calculate the spectral interference between A1 and the previous frequency point until the nearest non-interfering frequency point is found. This yields the spectral interference characteristics between A1 and all frequency points of device B.

[0037] The second scenario is that A1 is lower than all operating frequencies of device B. In that case, we start the calculation from frequency B1 and find the nearest interference-free frequency.

[0038] The third scenario is that A1 is between the frequency points of device B, and the nearest interference-free frequency point is found on both sides.

[0039] The above steps allow us to calculate the interference characteristics between device A1 and device B at all frequency points. This involves iterating through all frequency points of device A. The above method allows us to calculate the spectral interference between all frequency points of all frequency-using devices within the group.

[0040] Step 3: Allocate frequencies based on the spectrum interference calculation results. First, allocate the current frequency points used by devices that have not reported spectrum interference to the device. Then, set the allocation priority for frequency-using devices within the group, with devices that report interference having the highest priority. The highest priority device performs the first round of frequency allocation, starting from the smallest allocable frequency point. If the frequency point does not interfere with any previously allocated frequency point, it is allocated; if the frequency point interferes with any previously allocated frequency point, it cannot be allocated. Move to the next frequency point until an interference-free frequency point is found. This completes the frequency allocation for this device in this round. Then, use the same method to allocate frequencies to the next device. After completing the first round of allocation, perform the next round of frequency allocation according to priority until all frequencies are allocated.

[0041] Step 4: The above method forms a frequency adjustment scheme. This scheme recalculates the interference based on the distance of the current frequency-using equipment, avoids interference frequencies and eliminates spectrum conflicts through frequency redistribution, and only adjusts the current frequency of the reported interference equipment, achieving minimal change to the current frequency.

[0042] In another embodiment of the present invention, a method for rapid frequency adjustment based on minimum variation and conflict resolution is provided, comprising the following steps: There are five frequency-using devices: A, B, C, D, and E. Devices A, B, and C are of the same model, operating on 30 frequencies (F1-F30). Devices D and E operate on different frequency bands, with 20 frequencies (E1-E20). Currently, device A's frequency allocation scheme is F3, F12, F22, and it is currently using frequency F3; device B's is F1, F9, F19, F28, and it is currently using frequency F1; device C's is F6, F16, F25, and it is currently using frequency F6; device D's is E1, E7, E14, and it is currently using frequency E7; and device E's is E4, E10, E18, and it is currently using frequency E18. Device A has reported frequency interference. The specific steps for interference mitigation are as follows: Step 1: Group all frequency-using devices according to frequency bands. Devices A, B, and C are in the same group. Devices D and E are in the same group.

[0043] Step 2: The spectrum management software receives the spectrum interference information reported by device A. Based on the distance between the currently using device and all devices in the same group, the software calculates the spectrum interference using the electromagnetic interference equation. For example, if the distance between device A and device B is R, and both device A and device B have 30 operating frequency points, the software iterates through the frequency points of device A, first calculating the spectrum interference between device A's first frequency point A1 and device B. The calculation method is as follows: (1) Calculate the radiated power density S at point B when A emits at frequency A1:

[0044] Among them, P A Let G be the transmission power of A. A Let P be the antenna gain of A in the direction of B. The interference power P received by the sensitive device's antenna. r for:

[0045] A r The effective receiving area of ​​the receiving antenna of device B can be expressed as:

[0046] λ r For the wavelength received by device B, G B Let λ be the receiving antenna gain of device B. r Represented as:

[0047] c is the speed of light. If A is emitted at frequency A1 and the sideband suppression at frequency B2 is L, then the interference power at the receiving frequency is:

[0048] The sensitivity level of B is S B If P r >S B If A transmits via A1 and B receives via B2, then there is spectral interference between them; otherwise, there is no spectral interference. The frequency point to be calculated for device B.

[0049] (2) Calculate the spectral interference when B transmits and A receives. The radiation power density S at point A when B is emitted is calculated as follows:

[0050] Among them, P B For the transmission power of B, G B Let B be the antenna gain in the direction of A. Let P be the interference power received by the sensitive device's antenna.r for:

[0051] A r The effective receiving area of ​​the receiving antenna of device A can be expressed as:

[0052] λ r For device A to receive wavelength, G A Let λ be the receiving antenna gain of device A, where λ is the λ' ... r Represented as:

[0053] c is the speed of light. If B is emitted at frequency B2 and the sideband suppression at frequency A1 is L, then the interference power at the received frequency is:

[0054] The sensitivity level of A is S A If P r >S A If A receives via A1 and B transmits via B2, then there is spectral interference between them; otherwise, there is no spectral interference.

[0055] (3) When the above calculation results are all negative, there is no spectrum interference. Device A operates at frequency A1 and device B operates at frequency B2. Otherwise, there is spectrum interference.

[0056] (4) If there is no spectral interference between A1 and B2, then there is no spectral interference between A1 and all frequency points of device B; if there is spectral interference between A1 and B2, then calculate the spectral interference between A1 and the next frequency point until the nearest non-interfering frequency point is found. In this way, the spectral interference characteristics of A1 and all frequency points of device B are obtained.

[0057] The above steps allow us to calculate the interference characteristics between device A1 and device B at all frequency points. This involves iterating through all frequency points of device A. The above method allows us to calculate the spectral interference between all frequency points of all frequency-using devices within the group.

[0058] Step 3: Allocate frequencies based on the spectrum interference calculation results. First, assign the current frequency points used by devices that have not reported spectrum interference to the device, i.e., F1 is assigned to device B, and F6 is assigned to device C. Then, set the allocation priority for frequency-using devices within the group, with the device that reported interference having the highest priority, so the allocation priority is ABC. The device with the highest priority performs the first round of frequency allocation, starting from the smallest allocable frequency point, which is F2. F2 conflicts with the already allocated frequency point F1 and cannot be allocated. Move to the next available frequency point until F10 becomes an allocable frequency point, thus completing the first round of allocation for device A. Then allocate to device B, whose nearest allocable frequency point is F14. Following the above method, the final frequency adjustment scheme is as follows: device A: F10, F21; device B: F1, F14, F25; device C: F6, F17, F28.

[0059] Step 4: The above method forms a frequency adjustment scheme. This scheme recalculates the interference based on the distance of the current frequency-using equipment, avoids interference frequencies and eliminates spectrum conflicts through frequency redistribution, and only adjusts the current frequency of the reporting interference equipment. Equipment B can still use the current frequency of F1, and equipment C can still use the current frequency of F6, achieving minimal change to the current frequency.

[0060] In another embodiment of the present invention, to facilitate better implementation of the method provided in the embodiments of the present invention, the present invention also provides a system based on the above method. The meanings of the terms are the same as in the above method, and specific implementation details can be found in the description of the method embodiments.

[0061] Please see Figure 2 , Figure 2 This is a schematic diagram of the system provided in an embodiment of the present invention. The system may include a group management module 201, an interference reporting module 202, an interference calculation module 203, a frequency allocation module 204, and a scheme output module 205, wherein: The group management module 201 is used to group devices according to their operating frequency bands; Interference reporting module 202 is used to receive spectrum interference information reported by the device; The interference calculation module 203 is used to perform pairwise spectrum interference detection on all devices in the group where the reported interference device is located. The frequency allocation module 204 is used to reallocate conflict-free frequency points to each device based on the interference detection results and a priority allocation strategy. The scheme output module 205 is used to determine the frequency adjustment scheme, in which only the frequency points of the reported interference devices are adjusted.

[0062] In some instances, spectrum interference detection includes bidirectional interference assessment, which calculates the interference power of device A to device B and the interference power of device B to device A. If the interference power in either direction exceeds the sensitivity threshold of the receiving device, interference is determined to exist.

[0063] In some instances, the interference power is: ,in, For transmission power, For the transmit antenna gain, Here, c represents the receiving antenna gain, and c represents the speed of light. f R is the receiving frequency, R is the distance between devices, and L is the sideband suppression attenuation.

[0064] In some instances, priority allocation strategies include: Prioritize reserving the currently used frequency points for devices that have not reported interference; Set the priority of reporting interference devices to the highest level; The minimum conflict-free frequency point is selected from the available frequency points and allocated according to priority.

[0065] In some instances, grouping is based on the operating frequency band of the devices. Devices in the same group have overlapping or similar operating frequency bands, while devices in different groups have operating frequency bands that are more than a preset threshold apart.

[0066] The above provides a detailed description of a method and system for rapid frequency adjustment based on minimal change and conflict resolution, as provided in the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for rapid frequency adjustment based on minimum change and conflict resolution, characterized in that, include: Group the devices according to their operating frequency bands; Receive spectrum interference information reported by the receiving device and perform pairwise spectrum interference detection on all devices in the group to which the reporting interfering device belongs; Based on the interference detection results, a priority allocation strategy is used to reallocate conflict-free frequency points to each device; A frequency adjustment plan was determined, which only adjusted the frequency points of the reported interference devices.

2. The method according to claim 1, characterized in that, The spectrum interference detection includes bidirectional interference judgment, which calculates the interference power of device A to device B and the interference power of device B to device A respectively. If the interference power in either direction exceeds the sensitivity threshold of the receiving device, interference is determined to exist.

3. The method according to claim 2, characterized in that, The interference power is: ,in, For transmission power, For the transmit antenna gain, Here, c represents the receiving antenna gain, and c represents the speed of light. f R is the receiving frequency, R is the distance between devices, and L is the sideband suppression attenuation.

4. The method according to claim 3, characterized in that, The priority allocation strategy includes: Prioritize reserving the currently used frequency points for devices that have not reported interference; Set the priority of reporting interference devices to the highest level; The minimum conflict-free frequency point is selected from the available frequency points and allocated according to priority.

5. The method according to claim 1, characterized in that, The grouping is based on the operating frequency band of the devices. Devices in the same group have overlapping or similar operating frequency bands, while devices in different groups have an interval of more than a preset threshold between their operating frequency bands.

6. A frequency adjustment system based on minimum variation and conflict resolution, characterized in that, include: The group management module is used to group devices according to their operating frequency bands; The interference reporting module is used to receive spectrum interference information reported by the device; The interference calculation module is used to perform pairwise spectral interference detection on all devices within the group of the reported interference device. The frequency allocation module is used to reallocate conflict-free frequency points to each device based on the interference detection results and a priority allocation strategy. The scheme output module is used to determine the frequency adjustment scheme, which only adjusts the frequency points of the reported interference devices.

7. The system according to claim 6, characterized in that, The spectrum interference detection includes bidirectional interference judgment, which calculates the interference power of device A to device B and the interference power of device B to device A respectively. If the interference power in either direction exceeds the sensitivity threshold of the receiving device, interference is determined to exist.

8. The system according to claim 7, characterized in that, The interference power is: ,in, For transmission power, For the transmit antenna gain, Here, c represents the receiving antenna gain, and c represents the speed of light. f R is the receiving frequency, R is the distance between devices, and L is the sideband suppression attenuation.

9. The system according to claim 8, characterized in that, The priority allocation strategy includes: Prioritize reserving the currently used frequency points for devices that have not reported interference; Set the priority of reporting interference devices to the highest level; The minimum conflict-free frequency point is selected from the available frequency points and allocated according to priority.

10. The system according to claim 6, characterized in that, The grouping is based on the operating frequency band of the devices. Devices in the same group have overlapping or similar operating frequency bands, while devices in different groups have an interval of more than a preset threshold between their operating frequency bands.

Images