Bandwidth control method and device, communication equipment, readable storage medium and program product

Abstract

The invention relates to a bandwidth control method and device, communication equipment, a readable storage medium and a computer program product. The method comprises the following steps: when no train runs, bandwidth control signals are sent to each new air interface NR base station, the bandwidth control signals comprise an adjustment cardinal number, and the bandwidth control signals are used for instructing each NR base station to adjust occupied bandwidth based on the adjustment cardinal number; determining a signal interference value after each NR base station completes bandwidth adjustment; the adjustment cardinal number is determined again based on the signal interference numerical value, the step of sending the bandwidth control signal to each new air interface NR base station is skipped to until a target adjustment cardinal number meeting the spread spectrum condition is determined, the bandwidth control signal is sent to each NR base station, and the bandwidth control signal comprises the target adjustment cardinal number. By adopting the method, the occupied bandwidth of the NR base station can be dynamically changed, the interference of the spread spectrum base station on the GSM-R uplink signal is eliminated while the spread spectrum of the base station is realized, and the stability of key communication links such as railway scheduling and train control is ensured.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a bandwidth control method, apparatus, communication equipment, computer-readable storage medium, and computer program product. Background Technology

[0002] Low-frequency bands are considered the golden bands in the communications field, characterized by low propagation loss, wide coverage, strong penetration, and low network deployment costs. Furthermore, their mature industry chain lays the foundation for various generations of mobile communication applications.

[0003] With the explosive growth of 5G (5th Generation Mobile Communication Technology) users, networks need to expand their coverage to be wider and deeper, making efficient spectrum utilization crucial. To reduce 5G deployment costs and improve coverage efficiency, related technologies are refarming the original 10M / 11M bandwidth of 800M LTE (Long Term Evolution) into 15M bandwidth of 800M NR (New Radio), maximizing the wide coverage advantage of low-frequency bands and achieving cost reduction and efficiency improvement.

[0004] However, refarming the original 10M / 11M bandwidth of 800M LTE to 15M bandwidth of 800M NR, if the 800M LTE base station site remains unchanged, will cause spurious interference and congestion interference to the uplink of the railway's 900M GSM-R (Global System for Mobile Communications – Railway) signal after the bandwidth is expanded to 15M. This will lead to a decrease in the quality of the uplink signal, causing risks such as scheduling delays and data interruptions, and threatening railway safety. Summary of the Invention

[0005] Therefore, it is necessary to provide a bandwidth control method, apparatus, communication equipment, computer-readable storage medium, and computer program product that can dynamically change the bandwidth occupied by a base station to address the above-mentioned technical problems.

[0006] In a first aspect, this application provides a bandwidth control method applied to a GSM-R base station dedicated to railways in a Global System for Mobile Communications (GSM-R), wherein the GSM-R base station operates in a first target frequency band, comprising:

[0007] During periods when no trains are running, a bandwidth control signal is sent to each New Radio (NR) base station. The bandwidth control signal includes an adjustment base number. The bandwidth control signal is used to instruct each NR base station to adjust the occupied bandwidth based on the adjustment base number. The NR base station operates in a second target frequency band, and the second target frequency band and the first target frequency band meet preset conditions.

[0008] After each NR base station completes bandwidth adjustment, the signal interference value is determined;

[0009] Based on the signal interference value, the adjustment base number is re-determined, and the process proceeds to the step of sending bandwidth control signals to each new air interface (NR) base station until a target adjustment base number that meets the spread spectrum conditions is determined. Then, a bandwidth control signal is sent to each NR base station, and the bandwidth control signal includes the target adjustment base number.

[0010] In one embodiment, determining the signal interference value includes:

[0011] The downlink radio frequency signals of each NR base station are received through the receiving channel corresponding to the second target frequency band, and the signal interference value is determined based on the downlink radio frequency signals.

[0012] Alternatively, noise signals can be received through a receiving channel corresponding to the first target frequency band, and the signal interference value can be determined based on the noise signals.

[0013] In one embodiment, the spreading condition includes the target adjustment base being the maximum value that makes the signal interference value less than or equal to the interference threshold.

[0014] In one embodiment, the method further includes:

[0015] A first bandwidth initialization signal is sent to each of the NR base stations. The first bandwidth initialization signal is used to instruct each of the NR base stations to set the occupied bandwidth to a first bandwidth, which is the original occupied bandwidth of the NR base station before spread spectrum.

[0016] In one embodiment, the step of redetermining the adjustment base based on the signal interference value includes:

[0017] If the signal interference value is less than or equal to the interference threshold, the adjustment base is increased by a preset value to obtain a new adjustment base, and the initial value of the adjustment base is 0.

[0018] Alternatively, if the signal interference value is greater than the interference threshold, the adjustment base is reduced by the preset value to obtain the target adjustment base.

[0019] In one embodiment, the method further includes:

[0020] A second bandwidth initialization signal is sent to each of the NR base stations. The second bandwidth initialization signal is used to instruct each of the NR base stations to set the occupied bandwidth to the second bandwidth, which is the target occupied bandwidth of the NR base station after spread spectrum.

[0021] In one embodiment, the step of redetermining the adjustment base based on the signal interference value includes:

[0022] If the signal interference value is greater than the interference threshold, the adjustment base is increased by a preset value to obtain a new adjustment base, the initial value of which is 0.

[0023] Alternatively, if the signal interference value is less than or equal to the interference threshold, the adjustment base number can be used as the target adjustment base number.

[0024] In one embodiment, sending bandwidth control signals to each new air interface (NR) base station includes:

[0025] Bandwidth control signals are sent to each of the NR base stations in parallel.

[0026] Alternatively, bandwidth control signals may be sent serially to each of the NR base stations.

[0027] Secondly, this application also provides a bandwidth control method applied to a new radio (NR) base station, comprising:

[0028] Receive bandwidth control signals transmitted by GSM-R base stations dedicated to railways from the Global System for Mobile Communications - Railway, wherein the bandwidth control signals include adjustment bases;

[0029] In response to the bandwidth control signal, the target occupied bandwidth is determined based on the adjustment base, and the NR signal is transmitted using the target occupied bandwidth.

[0030] In one embodiment, determining the target bandwidth usage based on the adjustment base includes:

[0031] The adjustment amplitude is determined based on the adjustment base number and the adjustment step size corresponding to the NR base station;

[0032] The target bandwidth is determined based on the current bandwidth usage and the adjustment value.

[0033] In one embodiment, the method further includes:

[0034] Receive the first bandwidth initialization signal sent by the GSM-R base station;

[0035] In response to the first bandwidth initialization signal, the currently occupied bandwidth is set to the first bandwidth, which is the original occupied bandwidth of the NR base station before spread spectrum, and the target occupied bandwidth is the sum of the first bandwidth and the adjustment amplitude.

[0036] In one embodiment, the method further includes:

[0037] Receive the second bandwidth initialization signal sent by the GSM-R base station;

[0038] In response to the second bandwidth initialization signal, the currently occupied bandwidth is set to the second bandwidth, which is the target occupied bandwidth after the NR base station is spread, and the target occupied bandwidth is the difference between the second bandwidth and the adjustment amplitude.

[0039] Thirdly, this application also provides a bandwidth control device applied to a GSM-R base station for railway use in a Global System for Mobile Communications (GSM-R), wherein the GSM-R base station operates in a first target frequency band, comprising:

[0040] The first transmitting module is used to transmit bandwidth control signals to each New Radio (NR) base station when there is no train running. The bandwidth control signal includes an adjustment base number. The bandwidth control signal is used to instruct each NR base station to adjust the occupied bandwidth based on the adjustment base number. The NR base station operates in a second target frequency band. The second target frequency band and the first target frequency band meet preset conditions.

[0041] The first determining unit is used to determine the signal interference value after each NR base station has completed bandwidth adjustment;

[0042] The second determining unit is used to redetermine the adjustment base number based on the signal interference value, and jump to the step of sending bandwidth control signals to each new air interface (NR) base station until a target adjustment base number that meets the spread spectrum conditions is determined, and sends bandwidth control signals to each NR base station, wherein the bandwidth control signals include the target adjustment base number.

[0043] In one embodiment, determining the signal interference value includes:

[0044] The downlink radio frequency signals of each NR base station are received through the receiving channel corresponding to the second target frequency band, and the signal interference value is determined based on the downlink radio frequency signals.

[0045] Alternatively, noise signals can be received through a receiving channel corresponding to the first target frequency band, and the signal interference value can be determined based on the noise signals.

[0046] In one embodiment, the spreading condition includes the target adjustment base being the maximum value that makes the signal interference value less than or equal to the interference threshold.

[0047] In one embodiment, the device further includes:

[0048] The second transmitting module is used to send a first bandwidth initialization signal to each of the NR base stations. The first bandwidth initialization signal is used to instruct each of the NR base stations to set the occupied bandwidth to a first bandwidth, which is the original occupied bandwidth of the NR base station before spread spectrum.

[0049] In one embodiment, the step of redetermining the adjustment base based on the signal interference value includes:

[0050] If the signal interference value is less than or equal to the interference threshold, the adjustment base is increased by a preset value to obtain a new adjustment base, and the initial value of the adjustment base is 0.

[0051] Alternatively, if the signal interference value is greater than the interference threshold, the adjustment base is reduced by the preset value to obtain the target adjustment base.

[0052] In one embodiment, the device further includes:

[0053] The third transmitting module is used to send a second bandwidth initialization signal to each of the NR base stations. The second bandwidth initialization signal is used to instruct each of the NR base stations to set the occupied bandwidth to the second bandwidth, which is the target occupied bandwidth of the NR base station after spread spectrum.

[0054] In one embodiment, the step of redetermining the adjustment base based on the signal interference value includes:

[0055] If the signal interference value is greater than the interference threshold, the adjustment base is increased by a preset value to obtain a new adjustment base, the initial value of which is 0.

[0056] Alternatively, if the signal interference value is less than or equal to the interference threshold, the adjustment base number can be used as the target adjustment base number.

[0057] In one embodiment, sending bandwidth control signals to each new air interface (NR) base station includes:

[0058] Bandwidth control signals are sent to each of the NR base stations in parallel.

[0059] Alternatively, bandwidth control signals may be sent serially to each of the NR base stations.

[0060] Fourthly, this application also provides a bandwidth control device for use in a new radio (NR) base station, comprising:

[0061] The first receiving module is used to receive the bandwidth control signal sent by the Global System for Mobile Communications - Railway Dedicated GSM-R base station, wherein the bandwidth control signal includes an adjustment base number;

[0062] The determination module is configured to, in response to the bandwidth control signal, determine the target occupied bandwidth based on the adjustment base, and transmit an NR signal using the target occupied bandwidth.

[0063] In one embodiment, determining the target bandwidth usage based on the adjustment base includes:

[0064] The adjustment amplitude is determined based on the adjustment base number and the adjustment step size corresponding to the NR base station;

[0065] The target bandwidth is determined based on the current bandwidth usage and the adjustment value.

[0066] In one embodiment, the device further includes:

[0067] The second receiving module is used to receive the first bandwidth initialization signal sent by the GSM-R base station;

[0068] The first response module is configured to respond to the first bandwidth initialization signal by setting the currently occupied bandwidth to the first bandwidth, wherein the first bandwidth is the original occupied bandwidth of the NR base station before spread spectrum, and the target occupied bandwidth is the sum of the first bandwidth and the adjustment amplitude.

[0069] In one embodiment, the device further includes:

[0070] The third receiving module is used to receive the second bandwidth initialization signal sent by the GSM-R base station;

[0071] The second response module is used to respond to the second bandwidth initialization signal by setting the currently occupied bandwidth to the second bandwidth, where the second bandwidth is the target occupied bandwidth after the NR base station is spread, and the target occupied bandwidth is the difference between the second bandwidth and the adjustment amplitude.

[0072] Fifthly, this application also provides a communication device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the method described in any of the preceding claims.

[0073] Sixthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in any of the preceding claims.

[0074] In a seventh aspect, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the method described in any of the preceding claims.

[0075] The aforementioned bandwidth control method, apparatus, communication equipment, computer-readable storage medium, and computer program product are applied to a GSM-R base station dedicated to railway transportation in the Global System for Mobile Communications (GSMA). During periods without train operation, the method sends a bandwidth control signal carrying an adjustment base value to each New Radio (NR) base station, instructing each NR base station to adjust its bandwidth. After each NR base station completes its bandwidth adjustment, the signal interference value is determined. Finally, based on the signal interference value, the adjustment base value is re-determined, and the process returns to sending bandwidth control signals to each NR base station until a target adjustment base value satisfying the spread spectrum conditions is determined. The bandwidth control signal includes the target adjustment base value. The GSM-R base station operates in a first target frequency band, and the NR base station operates in a second target frequency band, which satisfies preset conditions with the first target frequency band. By employing the bandwidth control method, apparatus, communication equipment, computer-readable storage medium, and computer program product provided in the embodiments of this application, interference control is achieved through the transformation of GSM-R base stations, dynamically changing the bandwidth occupied by NR base stations. This eliminates interference of the spread spectrum base station on GSM-R uplink signals while the base station is spreading its spectrum, ensuring the stability of critical communication links such as railway dispatching and train control. At the same time, it reduces manual intervention in the base station spreading process, improves the overall performance of NR base stations and the flexibility and resource utilization of spread spectrum network deployment. Attached Figure Description

[0076] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0077] Figure 1 This is a flowchart illustrating a bandwidth control method in one embodiment;

[0078] Figure 2 This is a flowchart illustrating the bandwidth control method in another embodiment;

[0079] Figure 3 This is a flowchart illustrating step 204 in one embodiment;

[0080] Figure 4 This is a schematic diagram of the bandwidth initialization process in one embodiment;

[0081] Figure 5This is a schematic diagram of the bandwidth initialization process in another embodiment;

[0082] Figure 6 This is a schematic diagram illustrating an application scenario of the bandwidth control method in one embodiment;

[0083] Figure 7 This is a schematic diagram of the bandwidth control system in one embodiment;

[0084] Figure 8 This is a schematic diagram of a bandwidth control method in one embodiment;

[0085] Figure 9 This is a structural block diagram of the bandwidth control device in one embodiment;

[0086] Figure 10 This is a structural block diagram of the bandwidth control device in another embodiment;

[0087] Figure 11 This is an internal structural diagram of a communication device in one embodiment. Detailed Implementation

[0088] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0089] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0090] To enable those skilled in the art to better understand the embodiments of this application, the terms involved in the embodiments of this application are explained below.

[0091] UE (User Equipment): refers to devices operating in a sensor-integrated network, such as drones. Sensor-integrated networks enable precise control and scheduling of drones, improving their flight efficiency; simultaneously, through real-time monitoring of drone flight status via the sensing network, potential safety hazards can be promptly identified and addressed.

[0092] NR-SS (NR Spread Spectrum): In 5G New Radio (NR), by extending the signal bandwidth, such as from 10MHz to 15MHz, the throughput of NR systems can be improved, coverage can be increased, and anti-interference capabilities can be enhanced.

[0093] DBS (Dynamic Bandwidth Switching): In 5G NR, a method that dynamically adjusts the channel bandwidth used by the base station transmitter based on real-time network conditions, such as traffic load, channel conditions, energy-saving requirements, and interference levels. For example, it can dynamically switch the bandwidth between 10MHz and 15MHz to reduce interference to other communication systems while maximizing the use of available bandwidth, thereby improving the spectrum efficiency and wireless resource utilization of the 5G NR spread spectrum refarming system.

[0094] NR-DSID (NR Downlink Signal Interference Detector): A module or device used to detect or probe relevant parameters of NR downlink signals, such as interference levels. It monitors the interference of NR downlink signals in real time, providing a basis for the NR downlink signal bandwidth controller to adjust bandwidth and other operations, so as to ensure that the interference between the NR system and other systems (such as GSM-R systems) is within a safe range, and to maintain the communication quality and system security of other systems (such as GSM-R systems).

[0095] NR-DBC (NR Downlink Bandwidth Controller): A module or device used to control the downlink signal bandwidth of the NR system. Based on the detection results of the NR downlink signal interference detector, it adjusts the bandwidth of the NR transmission signal baseband processor in the NR base station, thereby adjusting the communication performance of the NR system and reducing interference to other systems (such as the GSM-R system).

[0096] RSRP (Reference Signal Received Power): The linear average of the power received on a resource element (RE) carrying a cell-specific reference signal (CSI-RS (Channel State Information-Reference Signal) or SSB (Single Side Band)) within the measurement bandwidth. RSRP is the average power of the reference signal from the base station (eNB, gNB) measured at the receiver. It eliminates noise and interference, focusing only on the strength of the useful signal; therefore, it most purely reflects the path loss and coverage strength of the signal. RSRP directly reflects the network coverage quality at the receiver's location. Network planning engineers measure and analyze RSRP to create coverage maps, identify coverage blind spots or weak coverage areas, and thus optimize base station layout and parameters.

[0097] GSM-R (Global System for Mobile Communications – Railway): A wireless communication system based on GSM technology, specifically designed for railway communication. It is a dedicated network requiring strong anti-interference capabilities, support for high-speed mobility (up to 500 km / h), and low latency (≤0.5s). For example, a GSM-R base station can operate in the 900MHz frequency band, with uplink at 885-889 MHz and downlink at 930-934 MHz, used for critical services such as railway dispatching, train control, and emergency communications. This includes: Voice communication: real-time communication between train drivers and dispatchers / station staff, such as group calls and broadcasts. Data transmission: supporting the core communication link of CTCS-3 level train control systems, such as high-speed rail automatic driving. Priority control: emergency calls, such as accident alarms, can interrupt ordinary calls to ensure railway safety. Its main functions are to ensure train operation control, such as block section management, prevent rear-end collisions, and optimize dispatching efficiency, such as dynamically adjusting train timetables.

[0098] In one embodiment, such as Figure 1 As shown, a bandwidth control method is provided, applied to a GSM-R base station dedicated to railways in the Global System for Mobile Communications (GSMA), where the GSM-R base station operates in a first target frequency band. In this embodiment, the method includes steps 102 to 106, wherein:

[0099] Step 102: During the period when no train is running, a bandwidth control signal is sent to each new air interface NR base station. The bandwidth control signal includes an adjustment base. The bandwidth control signal is used to instruct each NR base station to adjust the occupied bandwidth based on the adjustment base. The NR base station operates in the second target frequency band. The second target frequency band and the first target frequency band meet preset conditions.

[0100] In this embodiment, the GSM-R base station acts as the control entity. During periods when no trains are running, such as railway nighttime maintenance periods or train-free windows in the scheduling plan, it can send bandwidth control signals to each New Radio (NR) base station. Upon receiving the bandwidth control signal, each NR base station adjusts its occupied bandwidth based on the adjustment base number carried in the signal. The adjustment base number is the basic unit for bandwidth adjustment; each adjustment uses the adjustment base number multiplied by a step size as the adjustment magnitude. The NR base station can adjust the currently occupied bandwidth based on this adjustment magnitude. The specific value of the adjustment base number can be set according to actual interference testing requirements; this embodiment does not impose specific limitations on it.

[0101] The aforementioned GSM-R base station operates in the first target frequency band, and the NR base station operates in the second target frequency band. The second target frequency band and the first target frequency band meet preset conditions. These preset conditions refer to the fact that the two frequency bands are adjacent or have a risk of spectrum overlap, which may cause spurious or blocking interference due to NR bandwidth expansion. Therefore, bandwidth control signals are needed to coordinate and adjust these conditions to ensure they do not exceed the threshold for safe reception by the GSM-R base station, thereby ensuring the safe operation of the railway system while maximizing the utilization of the NR spread spectrum bandwidth.

[0102] For example, taking a GSM-R base station with a first target frequency band of 900MHz and an NR base station with a second target frequency band of 800MHz, the high end of the 800MHz band and the low end of the 900MHz band are relatively close, which may cause spurious or blocking interference due to NR bandwidth expansion. Therefore, it is necessary to adjust the occupied bandwidth. For example, when there is no train running, the bandwidth control signal sent by the GSM-R base station will be received and parsed by each NR base station. The NR base station will adjust the bandwidth according to the adjustment base number in the signal, i.e., the preset adjustment step size. For example, if the adjustment base number is 1 and the step size is 1MHz, it means increasing the bandwidth by 1MHz, adjusting its own currently occupied bandwidth, for example, from 10MHz to 11MHz.

[0103] Step 104: After each NR base station completes bandwidth adjustment, determine the signal interference value.

[0104] In this embodiment, after each NR base station completes bandwidth adjustment based on the adjustment baseline, the GSM-R base station will activate an interference detection mechanism to determine the signal interference value. The signal interference value is a core indicator for measuring the degree of interference to the GSM-R system after the NR base station bandwidth adjustment. It includes, but is not limited to, the uplink noise floor increase in GSM-R (e.g., from the baseline of -110dBm to -105dBm, an increase of 5dB), the interference-to-noise ratio (INR), the ratio of interference signal power to noise floor, and the strength of spurious signals falling into the GSM-R uplink frequency band. These values ​​allow for a quantitative assessment of the interference risk under the current bandwidth.

[0105] Step 106: Based on the signal interference value, redetermine the adjustment base number and jump to the step of sending bandwidth control signals to each new air interface NR base station until the target adjustment base number that meets the spread spectrum conditions is determined. Send bandwidth control signals to each NR base station, and the bandwidth control signals include the target adjustment base number.

[0106] In this embodiment, the GSM-R base station determines whether there is excessive interference in the current bandwidth adjustment based on the signal interference value determined in step 104, and then re-determines the adjustment base, such as adjusting or reducing the adjustment base. After adjusting the adjustment base, it can directly jump to step 102 to resend the bandwidth control signal until a target adjustment base that meets the spreading conditions is determined. Finally, the bandwidth control signal carrying the target adjustment base is sent to each NR base station, and each NR base station adjusts the bandwidth based on the target adjustment base, ending the current bandwidth adjustment process.

[0107] The spreading condition includes a target adjustment base value that is the maximum value that makes the signal interference value less than or equal to the interference threshold. That is, when the current adjustment base value is determined to be the maximum value that makes the signal interference value less than or equal to the interference threshold, it can be determined that the bandwidth adjusted based on this adjustment base value is the maximum bandwidth value within the allowable interference range. This adjustment base value can be used as the target adjustment base value. Finally, a bandwidth control signal is sent based on this target adjustment base value to control each NR base station to perform a bandwidth adjustment, and then the bandwidth adjustment process ends.

[0108] The aforementioned bandwidth control method is applied to GSM-R base stations dedicated to railways in the Global System for Mobile Communications (GSMA). During periods without train operation, it sends bandwidth control signals carrying adjustment base values ​​to each New Radio (NR) base station, instructing each NR base station to adjust its bandwidth. After each NR base station completes its bandwidth adjustment, the signal interference value is determined. Finally, based on the signal interference value, the adjustment base value is re-determined, and the process returns to sending bandwidth control signals to each NR base station. This process continues until a target adjustment base value satisfying the spread spectrum conditions is determined, at which point a bandwidth control signal containing the target adjustment base value is sent to each NR base station. The GSM-R base station operates in a first target frequency band, and the NR base station operates in a second target frequency band. The second target frequency band and the first target frequency band meet preset conditions. The bandwidth control method provided in this application embodiment achieves interference control through GSM-R base station modification, dynamically changes the bandwidth occupied by NR base stations, and eliminates interference of spread spectrum base stations to GSM-R uplink signals while spreading the base station, ensuring the stability of key communication links such as railway dispatching and train control. At the same time, it reduces manual intervention in the base station spread spectrum process, improves the overall performance of NR base stations and the flexibility and resource utilization of spread spectrum network deployment.

[0109] In one exemplary embodiment, determining the signal interference value includes:

[0110] The downlink radio frequency signals of each NR base station are received through the receiving channel corresponding to the second target frequency band, and the signal interference value is determined based on the downlink radio frequency signals; or, noise signals are received through the receiving channel corresponding to the first target frequency band, and the signal interference value is determined based on the noise signals.

[0111] This application does not specifically limit the method for determining the signal interference value. For example, the signal interference value can be determined by the downlink radio frequency signal or by the uplink noise floor signal.

[0112] In one example, after the NR base station adjusts its bandwidth, its downlink will continuously transmit radio frequency signals. The GSM-R base station receives these signals through the newly added receiving channel corresponding to the second target frequency band, and then uses the NR downlink signal interference detector to detect the total interference level of the NR downlink signals of each NR base station, analyzes the spurious components in the signal that exceed the normal operating frequency band of NR, and then determines the signal interference value.

[0113] The NR downlink signal interference detector is responsible for NR downlink signal detection, including NR demodulation, NR decoding, real-time calculation of the reference signal received power RSRP of the downlink frequency band (e.g., 869~(879+x)MHz, where x is a variable bandwidth, x=0~5MHz), and comparison of RSRP with the RSRP safety threshold. If RSRP is less than the RSRP safety threshold, the NR downlink signal interference detector outputs a high level or a positive pulse to the NR downlink signal bandwidth controller; otherwise, the NR downlink signal interference detector outputs a low level or a negative pulse to the NR downlink signal bandwidth controller.

[0114] In another example, GSM-R uplink noise floor can also be detected during NR bandwidth adjustment. GSM-R receives the noise signal through a receiving channel corresponding to the first target frequency band and determines the signal interference value based on the noise signal. Here, the receiving channel corresponding to the first target frequency band refers to the inherent channel of the GSM-R base station itself used to receive uplink signals, matching its operating 900MHz frequency band, such as the 885-890MHz uplink band. After the NR base station adjusts its bandwidth, the noise signal received by this channel is actually the background noise of the GSM-R uplink, including natural noise and the superposition of interference from the NR base station. By comparing this noise signal with the noise floor baseline when there is no NR base station interference, the noise floor rise can be calculated. For example, a rise from the baseline of -110dBm to -100dBm, an increase of 10dB, is the signal interference value, directly reflecting the degree of blocking interference or overall interference of the GSM-R uplink caused by the NR bandwidth adjustment.

[0115] In one exemplary embodiment, the bandwidth control method described above may further include:

[0116] A first bandwidth initialization signal is sent to each NR base station. The first bandwidth initialization signal is used to instruct each NR base station to set its occupied bandwidth to the first bandwidth, which is the original occupied bandwidth of the NR base station before spread spectrum.

[0117] In this embodiment, during the initial stage of bandwidth control, the GSM-R base station instructs each NR base station to set its occupied bandwidth to the original occupied bandwidth, i.e., the first bandwidth, by sending a first bandwidth initialization signal to each NR base station. Specifically, the first bandwidth refers to the initial operating bandwidth of the NR base station before spectrum spreading, which is the starting bandwidth for subsequent gradual spectrum spreading. For example, with a first bandwidth of 10MHz, the NR base station operates at 10MHz without interference from the GSM-R base station.

[0118] For example, the GSM-R base station first sends a first bandwidth initialization signal to each NR base station. Upon receiving the signal, each NR base station automatically adjusts its occupied bandwidth from a possible intermediate state, such as resetting it from 12MHz (as previously tested) to a first bandwidth of 10MHz. After all NR base stations confirm the bandwidth reset is complete, the GSM-R base station then starts the subsequent loop process (steps 102 to 106) when no trains are running.

[0119] In an exemplary embodiment, when all NR base stations are uniformly set to occupy a first bandwidth, redetermining the adjustment base based on the signal interference value may include:

[0120] If the signal interference value is less than or equal to the interference threshold, the adjustment base is increased by a preset value to obtain a new adjustment base. The initial value of the adjustment base is 0.

[0121] Alternatively, if the signal interference value is greater than the interference threshold, the adjustment base value can be reduced by a preset value to obtain the target adjustment base value.

[0122] In this embodiment, after determining the signal interference value, the GSM-R base station compares this value with the interference threshold. If the signal interference value is less than or equal to the interference threshold, it indicates that the bandwidth expansion under the current adjustment base (e.g., based on an initial adjustment base of 0, a preset value of 1, and after the first adjustment +1, the current adjustment base is 1; assuming the adjustment step size of the NR base is 1MHz, then the bandwidth is increased from 10MHz to 11MHz based on this adjustment base) has not caused excessive interference to the GSM-R system, and the bandwidth can continue to be expanded. In this case, the adjustment base is increased by the preset value again to obtain a new adjustment base, and the bandwidth adjustment process of steps 102 to 106 is repeated.

[0123] The interference threshold is a pre-set safety threshold, such as a noise floor increase ≤ 3dB or an interference-to-noise ratio (I / N) ≤ -6dB. It is used to determine whether the interference after the current NR base station bandwidth adjustment is within the acceptable range of the GSM-R system. In this embodiment, the setting of the interference threshold is not specifically limited. The initial adjustment base value is 0, indicating that when the bandwidth adjustment process starts, the NR base station's bandwidth is at the first bandwidth, i.e., the original bandwidth before spread spectrum, such as 10MHz, and no expansion has been performed. The preset value is a fixed adjustment amplitude, such as 1. Increasing the current adjustment base by this preset value 1 yields a new adjustment base of 2. Assuming the NR base station's adjustment step size is 1MHz, the next bandwidth adjustment amplitude will be 2MHz, increasing from the first bandwidth of 10MHz to 12MHz.

[0124] If the signal interference value exceeds the interference threshold, it indicates that the bandwidth expansion under the current adjustment base is excessive. For example, with an adjustment base of 2 and an adjustment step size of 1MHz, increasing from 10MHz to 12MHz exceeds the interference tolerance capability of the GSM-R system, posing a safety risk. In this case, it can be determined that the previously determined adjustment base is the maximum value that can meet the interference tolerance capability of the GSM-R system. Therefore, the adjustment step size can be reduced by decreasing the preset value to revert to the previously determined adjustment base, which is now the target adjustment base.

[0125] This application embodiment precisely locks the secure spread spectrum boundary by reducing the adjustment base number, ensuring that the final determined bandwidth meets the requirements of the NR system, maximizes resource utilization, and does not affect the security of GSM-R communication.

[0126] In one exemplary embodiment, the bandwidth adjustment method described above may further include:

[0127] A second bandwidth initialization signal is sent to each NR base station. The second bandwidth initialization signal is used to instruct each NR base station to set its occupied bandwidth to the second bandwidth, which is the target occupied bandwidth of the NR base station after spread spectrum.

[0128] In this embodiment, during the initial stage of bandwidth control, the GSM-R base station instructs each NR base station to set its occupied bandwidth to the target occupied bandwidth, i.e., the second bandwidth, by sending a second bandwidth initialization signal to each NR base station. The second bandwidth is the target occupied bandwidth of the NR base station after spread spectrum, specifically referring to the upper limit of the spread spectrum bandwidth of the NR base station. For example, if the NR base station normally operates at 10MHz, and the upper limit of the spread spectrum bandwidth of the NR base station is 15MHz, then the NR base station is spreading from 10MHz to 15MHz, and 15MHz is the second bandwidth.

[0129] For example, the GSM-R base station first sends a second bandwidth initialization signal to each NR base station. After receiving the signal, each NR base station automatically adjusts its own bandwidth to the second bandwidth, such as 15MHz. After all NR base stations confirm that the bandwidth adjustment is complete, the GSM-R base station then starts the subsequent loop process, i.e., steps 102 to 106.

[0130] In an exemplary embodiment, when all NR base stations are uniformly set to occupy the second bandwidth, the adjustment base is re-determined based on the signal interference value, including:

[0131] If the signal interference value is greater than the interference threshold, the adjustment base will be increased by a preset value to obtain a new adjustment base. The initial value of the adjustment base is 0.

[0132] Alternatively, if the signal interference value is less than or equal to the interference threshold, the adjustment base value can be used as the target adjustment base value.

[0133] In this embodiment of the application, taking a target bandwidth of 15MHz as an example, after the GSM-R base station determines the signal interference value, it compares this value with the interference threshold. If the signal interference value is greater than the interference threshold, no downward adjustment is made at this time, that is, the initial adjustment base value is 0. This indicates that the current 15MHz bandwidth has caused excessive interference to the GSM-R system, and it is necessary to increase the adjustment base to expand the downward adjustment range and continue to test the interference situation under a lower bandwidth.

[0134] For example, the preset value is 1MHz, and the initial adjustment base is 0, corresponding to 15MHz. After detecting excessive interference, the base is increased by the preset value of 1 to obtain a new adjustment base of 1. Assuming that the adjustment step size of the NR base station is 1MHz at this time, the bandwidth needs to be adjusted down by 1MHz from 15MHz to 14MHz. If the signal interference value under the 14MHz bandwidth is still greater than the interference threshold, the adjustment base is increased by the preset value of 1 to obtain a new adjustment base of 2, that is, the bandwidth is further adjusted down to 13MHz. And so on, by gradually increasing the adjustment base, the bandwidth is reduced stepwise from 15MHz to 14MHz, 13MHz, etc., until the bandwidth that meets the interference standard is found.

[0135] Using the bandwidth adjustment scheme described above, if the signal interference value is less than or equal to the interference threshold when the bandwidth is reduced from 15MHz to 12MHz, it indicates that the interference of the current adjustment base value of 12MHz to the GSM-R system is within a safe range, and there is no need to continue adjusting downwards. At this point, the current adjustment base value of 3 is directly determined as the target adjustment base value, and the bandwidth of 12MHz corresponding to this base value is the appropriate bandwidth that the NR base station should ultimately operate on.

[0136] In one exemplary embodiment, sending bandwidth control signals to each New Radio (NR) base station includes:

[0137] Bandwidth control signals are sent to each NR base station in parallel; or, bandwidth control signals are sent to each NR base station serially.

[0138] In this application embodiment, no specific limitation is made on the method of transmitting the bandwidth control signal. For example, parallel transmission can be used to implement parallel bandwidth control, or serial transmission can be used to implement serial bandwidth control.

[0139] In one example, when a GSM-R base station sends bandwidth control signals to each NR base station, it can use a parallel transmission method. Parallel transmission means that the GSM-R base station simultaneously sends bandwidth control signals to all NR base stations to be adjusted, such as multiple NR base stations covering the same railway section. After receiving the bandwidth control signals, all NR base stations perform bandwidth adjustment based on the adjustment baseline.

[0140] For example, when the adjustment base is 1MHz, the GSM-R base station simultaneously sends bandwidth control signals to NR base station 1, NR base station 2, and NR base station 3 through the same signal channel. After receiving the bandwidth control signals, the three base stations synchronously adjust their bandwidth from the current value, such as 10MHz, upwards by 1MHz, i.e., synchronously becoming 11MHz. This method can significantly shorten the overall adjustment time.

[0141] In another example, the GSM-R base station can also use a serial transmission method when sending bandwidth control signals to each NR base station. Serial transmission means that the GSM-R base station sends bandwidth control signals to each NR base station one by one in a preset order, such as base station number, distance priority from the railway line, etc. After each transmission, it receives the downlink radio frequency signals from each NR base station through the receiving channel corresponding to the second target frequency band, determines the interference value of each NR base station based on the downlink radio frequency signals, and continues to send bandwidth control signals to the remaining NR base stations if the interference value is less than or equal to the interference threshold, until the interference value exceeds the interference threshold or the bandwidth control signals have been sent to all NR base stations.

[0142] For example, assuming the adjustment base is 1MHz, the GSM-R base station first sends a bandwidth control signal to NR base station 1. After NR base station 1 completes the adjustment from 10MHz to 11MHz and sends back an adjustment completion signal, it sends the same signal to NR base station 2, and so on until all base stations have completed the adjustment.

[0143] The advantage of serial control is that interference is traceable. If excessive interference is detected after a round of adjustments, the last NR base station adjusted can be identified as the key target for investigation by adjusting the order, making it easier to locate the source of interference. At the same time, serial transmission can avoid signal superposition interference caused by simultaneous adjustments of multiple base stations, making it suitable for scenarios with high requirements for interference location accuracy, such as the first bandwidth adjustment test of a certain section, where the interference characteristics of each base station need to be clearly defined.

[0144] In an exemplary embodiment, when a GSM-R base station detects weather changes, such as changes in temperature, humidity, or wind speed, and determines that the changes meet the conditions for readjusting bandwidth, it will trigger the execution of step 102 above to re-execute the bandwidth control process and adjust the bandwidth of each NR base station.

[0145] In one embodiment, such as Figure 2 As shown, a bandwidth control method is provided, applied to a new radio (NR) base station. The method includes steps 202 to 204, wherein:

[0146] Step 202: Receive the bandwidth control signal sent by the Global System for Mobile Communications - Railway Dedicated GSM-R base station. The bandwidth control signal includes the adjustment base.

[0147] In this embodiment, the NR base station acts as the executor of bandwidth adjustment. The bandwidth control signal it receives is sent by the GSM-R base station. This bandwidth control signal is an adjustment command generated by the GSM-R base station based on interference detection results. The signal contains an adjustment base. The NR base station combines the adjustment base with the current base station's adjustment step size to determine the bandwidth adjustment range, such as 1MHz or 2MHz. The adjustment direction can be forward or reverse, that is, increasing or decreasing the existing bandwidth.

[0148] The process of the GSM-R base station sending bandwidth control signals and determining the adjustment base number can be referred to the relevant description in the foregoing embodiments, and will not be repeated here in the embodiments of this application.

[0149] Step 204: In response to the bandwidth control signal, determine the target occupied bandwidth based on the adjustment base, and transmit the NR signal using the target occupied bandwidth.

[0150] In this embodiment of the application, after receiving the bandwidth control signal, the NR base station immediately initiates the response process, analyzes the adjustment base number in the signal, calculates the target occupied bandwidth by combining its current occupied bandwidth and adjustment step size, and then adjusts the operating parameters, such as the frequency range of signal transmission and filtering parameters, through the internal radio frequency module to switch the actual occupied bandwidth to the target value, and transmits the NR downlink signal based on the bandwidth.

[0151] The aforementioned bandwidth control method is applied to NR base stations. After receiving the bandwidth control signal sent by GSM-R, the NR base station can respond to the bandwidth control signal, determine the target occupied bandwidth based on the adjustment base number carried by the bandwidth control signal, and transmit NR signals using the target occupied bandwidth. Using the bandwidth control method provided in this application embodiment, interference control is achieved through the modification of GSM-R base stations, dynamically changing the occupied bandwidth of the NR base station. This eliminates interference from the spread spectrum base station to the GSM-R uplink signal while the base station is spreading its spectrum, ensuring the stability of critical communication links such as railway dispatching and train control. Simultaneously, it reduces manual intervention during the base station's spectrum spreading process, improving the overall performance of the NR base station, the flexibility of the spread spectrum network, and resource utilization.

[0152] In one embodiment, such as Figure 3 As shown, in step 204, determining the target bandwidth based on the adjusted base number may include steps 302 to 304, wherein:

[0153] Step 302: Determine the adjustment magnitude based on the adjustment base number and the adjustment step size corresponding to the NR base station;

[0154] Step 304: Determine the target bandwidth based on the current bandwidth usage and the adjustment value.

[0155] In this embodiment, after receiving the bandwidth control signal from the GSM-R base station, the NR base station calculates the adjustment amplitude based on the adjustment base and the corresponding adjustment step size of the NR base station, and determines the target occupied bandwidth in conjunction with the currently occupied bandwidth. The adjustment step size is the bandwidth adjustment unit of the NR base station, and its size is directly proportional to the distance between the NR base station and the GSM-R base station. That is, the smaller the distance, the greater the interference, and the smaller the adjustment step size can be set; conversely, the larger the distance, the less the interference, and the larger the adjustment step size can be set. For example, the adjustment step size can take values ​​of 0.1MHz, 0.2MHz, 0.5MHz, 1MHz, 2MHz, etc., and this embodiment does not specifically limit this. The adjustment amplitude is the actual bandwidth adjustment range, which is calculated as the adjustment base multiplied by the adjustment step size.

[0156] For example, the adjustment base number sent by the GSM-R base station is 2, and the adjustment step size of a certain NR base station is 0.5MHz, that is, each adjustment base number corresponds to 0.5MHz adjustment, so the adjustment amplitude is 2×0.5=1MHz.

[0157] In one embodiment, such as Figure 4 As shown, the method may further include steps 402 to 404, wherein:

[0158] Step 402: Receive the first bandwidth initialization signal sent by the GSM-R base station;

[0159] Step 404: In response to the first bandwidth initialization signal, the currently occupied bandwidth is set to the first bandwidth, which is the original occupied bandwidth of the NR base station before spread spectrum, and the target occupied bandwidth is the sum of the first bandwidth and the adjustment amplitude.

[0160] In this embodiment, after receiving the first bandwidth initialization signal from the GSM-R base station, the NR base station immediately initiates a bandwidth reset process. Through its internal configuration module, it forcibly switches the currently occupied bandwidth to the first bandwidth, i.e., the original occupied bandwidth before spread spectrum. After completing the first bandwidth setting, the NR base station sends an initialization completion signal back to the GSM-R base station. Upon receiving feedback from all NR base stations, the GSM-R base station can initiate the subsequent bandwidth control signal transmission process. After receiving the bandwidth control signal, the NR base station calculates the target occupied bandwidth by combining the first bandwidth, adjustment base value, and adjustment step size. The calculation logic is: Target occupied bandwidth = First bandwidth + Adjustment amplitude.

[0161] For example, suppose an NR base station was previously adjusted to a 12MHz bandwidth for testing. After receiving the initialization signal, it will automatically reset the bandwidth to the first bandwidth of 10MHz and send a reset completion signal back to the GSM-R base station. After receiving feedback from all NR base stations, the GSM-R base station sends a bandwidth control signal, where the adjustment base is 1. If the current adjustment step size of the NR base station is 1MHz, then the adjustment amplitude is the adjustment base multiplied by the adjustment step size, which is 1MHz. Therefore, the target occupied bandwidth is the first bandwidth of 10MHz + the adjustment amplitude in MHz, which is 11MHz. If the adjustment base is 2, then the adjustment amplitude is determined to be 2MHz, and the target occupied bandwidth is 12MHz, and so on.

[0162] In one exemplary embodiment, such as Figure 5 As shown, the method may further include steps 502 to 504, wherein:

[0163] Step 502: Receive the second bandwidth initialization signal sent by the GSM-R base station;

[0164] Step 504: In response to the second bandwidth initialization signal, the currently occupied bandwidth is set to the second bandwidth, which is the target occupied bandwidth after the NR base station spread spectrum, and the target occupied bandwidth is the difference between the second bandwidth and the adjustment amplitude.

[0165] In this embodiment, after receiving the second bandwidth initialization signal from the GSM-R base station, the NR base station immediately initiates a bandwidth adjustment process. Through its internal configuration module, it forcibly switches the currently occupied bandwidth to the second bandwidth, which is the target bandwidth after spread spectrum. After completing the second bandwidth setting, the NR base station sends an initialization completion signal back to the GSM-R base station. Upon receiving feedback from all NR base stations, the GSM-R base station initiates the subsequent bandwidth control signal transmission process. Upon receiving the bandwidth control signal, the NR base station calculates the target bandwidth by combining the second bandwidth, adjustment base value, and adjustment step size. The calculation logic is: Target bandwidth = Second bandwidth - Adjustment amplitude.

[0166] For example, suppose an NR base station was previously adjusted to a 12MHz bandwidth for testing. After receiving the initialization signal, it will automatically adjust the bandwidth to a second bandwidth of 15MHz and feed back the adjustment completion signal to the GSM-R base station. After receiving feedback from all NR base stations, the GSM-R base station sends a bandwidth control signal, where the adjustment base is 1. If the current adjustment step size of the NR base station is 1MHz, then the adjustment amplitude is the adjustment base × the adjustment step size, which is 1MHz. Therefore, the target occupied bandwidth is the first bandwidth of 15MHz - the adjustment amplitude of 1MHz, which is 14MHz. If the adjustment base is 2, then the adjustment amplitude is determined to be 2MHz, the target occupied bandwidth is 13MHz, and so on.

[0167] To enable those skilled in the art to better understand the embodiments of this application, the embodiments of this application are described below through specific examples.

[0168] This application proposes a bandwidth control method based on propagation loss to dynamically change the operating bandwidth of NR. For example... Figure 6 As shown, if the downlink bandwidth of an 800M NR base station near the railway line is always 15MHz, it will cause uplink interference to the GSM-R signal, seriously threatening the safety of train operation. If the downlink bandwidth of an 800M NR base station near the railway line is always 10MHz, although it will not cause uplink interference to the GSM-R signal, it will seriously waste the 5MHz spectrum resources extended by the 800M NR, severely affecting the performance of the 800M network and the user experience. Therefore, by adding modules such as NR downlink signal receiving channels, NR downlink signal interference detectors, and NR downlink signal bandwidth controllers to GSM-R base stations near railway lines, and utilizing the newly added Xn interface between NR base stations and GSM-R base stations during periods without train traffic, the GSM-R base stations adjust and control the downlink bandwidth of all surrounding NR 800M base stations. The system performs total interference detection on the downlink signals emitted by all NR 800M base stations after the downlink bandwidth adjustment, and performs closed-loop adjustment (parallel or serial adjustment) of the downlink bandwidth of all surrounding NR 800M base stations based on the total interference detection results until the total NR downlink signal interference level does not exceed the threshold for safe reception by the GSM-R base station. This eliminates the uplink interference of 800M NR 15M spread spectrum refarming base stations on the 900M GSM-R system, ensuring the safe operation of the railway system while maximizing the utilization of the 800M NR spread spectrum bandwidth, improving the spectral efficiency of the 800M NR spread spectrum refarming system, improving the resource utilization of the 800M NR spread spectrum network, and enhancing the 800M... The networking flexibility of NR spread spectrum networks improves the performance and user experience of 800M NR spread spectrum networks, and reduces the construction, operation and maintenance and optimization costs of 800M NR spread spectrum refarming networks, thus possessing both economic value and application prospects.

[0169] For example, the system scheme of the above bandwidth control method consists of, such as Figure 7 As shown in the figure. Among them, the NR base station i (1~N) is mainly composed of NR transmitting signal baseband processor, transmitting channel, receiving channel, and NR receiving signal baseband processor.

[0170] The NR transmit signal baseband processor (variable bandwidth) is responsible for the 800M NR variable bandwidth (its bandwidth varies between 10MHz and 15MHz) transmit protocol processing (signal encoding, modulation, encapsulation, etc.) and transmit scheduling processing. When the input terminal receives the output signal DL_BW_Ctrli (i.e., the bandwidth control signal) from the NR downlink signal bandwidth controller in the GSM-R base station, the current bandwidth of the NR base station transmit signal (800M NR downlink signal) baseband processor is adjusted to NewBWi=10M+DL_BW_Ctrli*Stepi, where i (i=1~N) represents the i-th NR 800M / 15MHz base station and its corresponding module or signal, NewBWi is the current bandwidth, and Stepi is the step size. It outputs the 800M NR variable bandwidth baseband signal to the transmit channel (800M / 15MHz).

[0171] The transmit channel (800M / 15MHZ) is responsible for the transmission and processing of 800M NR signals in the 800M band (variable bandwidth is NewBWi), including 800M transmit digital intermediate frequency, transmitter, filtering, power amplification and RF transmit front end, etc., and outputs 800M (variable bandwidth is NewBWi) RF signals to the transmit antenna.

[0172] The receiving channel (800M / 15MHZ) is responsible for receiving and processing 800M NR signals in the 800M frequency band (fixed or variable bandwidth). This includes inputting 800M RF signals from the receiving antenna, RF receiving front-end, filtering, low-noise amplification, receiver, and receiving digital intermediate frequency, and outputting 800M (fixed or variable bandwidth) baseband signals to the NR receiving signal baseband processor (fixed or variable bandwidth).

[0173] The NR receiver baseband processor (fixed or variable bandwidth) is responsible for 800M NR fixed (15MHz) or variable bandwidth (linked with the transmit bandwidth to keep the transmit and receive bandwidths consistent, i.e., the receive variable bandwidth is also NewBWi) receive protocol processing (signal decoding, demodulation, decapsulation, etc.) and receive scheduling processing; its input 800M NR baseband signal comes from the receive channel (800M / 15MHZ).

[0174] A GSM-R base station mainly consists of a GSM-R transmitting signal baseband processor, a transmitting channel, a receiving channel, a GSM-R receiving signal baseband processor, a receiving channel, an NR downlink signal interference detector, and an NR downlink signal bandwidth controller.

[0175] The GSM-R baseband signal processor is responsible for GSM-R transmission protocol processing (signal encoding, modulation, encapsulation, etc.) and transmission scheduling; it outputs GSM-R baseband signals to the transmission channel (900M / 4MHZ).

[0176] The transmit channel (900M / 4MHZ) is responsible for the transmission and processing of 900M GSM-R signals in the 900M frequency band, including 900M transmit digital intermediate frequency, transmitter, filtering, power amplification and RF transmission front end, and outputs 900M (4M) RF signals to the transmit antenna.

[0177] The receiving channel (900M / 4MHZ) is responsible for receiving and processing 900M GSM-R signals in the 900M frequency band, including inputting 900M RF signals from the receiving antenna, RF receiving front-end, filtering, low noise amplification, receiver and receiving digital intermediate frequency, etc.; outputting 900M (4M) baseband signals to the GSM-R receiving signal baseband processor.

[0178] The GSM-R receiver baseband processor is responsible for GSM-R receiver protocol processing (signal decoding, demodulation, decapsulation, etc.) and receiver scheduling processing, etc. Its input 900M GSM-R baseband signal comes from the receiver channel (900M / 4MHZ).

[0179] The receiving channel (800M / 15MHZ) (i.e., the receiving channel corresponding to the second target frequency band) functions similarly to the receiving channel in the 800M NR base station. It serves the NR downlink signal interference detector, that is, it is responsible for receiving and processing 800M NR related signals in the 800M frequency band, including inputting 800M radio frequency signals from the receiving antenna, radio frequency receiving front-end, filtering, low noise amplification, receiver and receiving digital intermediate frequency, etc., and outputting 800M (variable bandwidth) baseband signals to the NR downlink signal interference detector.

[0180] The NR downlink signal interference detector is responsible for detecting the NR 800M downlink signal (variable bandwidth), including NR demodulation, NR decoding, and real-time calculation of the reference signal received power RSRP in the downlink band (869~(879+x)MHz, where x is the variable bandwidth, x=0~5MHz). It compares RSRP with a safety threshold; if RSRP is less than the safety threshold, the NR-DL-Det signal is output as a high level (or a positive pulse); otherwise, it is output as a low level (or a negative pulse). The NR-DL-Det signal is then output to the NR downlink signal bandwidth controller.

[0181] The NR downlink signal bandwidth controller is responsible for controlling the variable bandwidth operations of the NR transmit signal baseband processor in NR base station i. Its input signal is the output signal NR-DL-Det of the NR downlink signal interference detector. When NR-DL-Det outputs a high level (or a positive pulse), DL_BW_Ctrli is incremented by 1 (DL_BW_Ctrli++). When NR-DL-Det outputs a low level (or a negative pulse), DL_BW_Ctrli is decremented by 1 (DL_BW_Ctrli--), and DL_BW_Ctrli is output to the input of NR base station i to control the variable bandwidth of the NR transmit signal baseband processor in NR base station i. RSRP measurement is based on the reference signal SSB, i.e., the linear average of the power values ​​of the N reference signals SSB REs within all measurement bandwidths. The calculation formula is:

[0182]

[0183] Where k represents the beam, l represents the distance, and r represents the radius.

[0184] For example, the system workflow of the above bandwidth control method is as follows: Figure 8 As shown.

[0185] (1) Initialization process of GSM-R 900MHz / 4MHz base station. Set the initial outputs DL_BW_Ctrl1~N of the NR downlink signal bandwidth controller to 0. DL_BW_Ctrl1~N correspond to the downlink bandwidth control signals of N NR800M / 15MHz base stations (i.e., NR 800M / 15MHz base stations 1~N) near GSM-R 900MHz / 4MHz.

[0186] (2) Initialization process of NR 800M / 15M base station 1~N. According to DL_BW_Ctrl1~N (all of which are 0 at this time), the initial bandwidth of the NR transmitting signal baseband processor in N NR800M / 15M base stations is configured to 10M, and the initial bandwidth of the NR receiving signal baseband processor is configured to 15M (taking the transmitting and receiving bandwidths as different as an example, this application embodiment also supports the scenario where the transmitting and receiving bandwidths are the same, that is, the initial bandwidth of the NR receiving signal baseband processor is also configured to 10M).

[0187] (3) During periods when there are no trains running, the NR downlink signal bandwidth controller in the GSM-R base station will increment the values ​​of DL_BW_Ctrl1~N by 1 (DL_BW_Ctrl1~N++) and output it to all NR 800M / 15M base stations.

[0188] (4) NR 800M / 15M base stations 1~N adjust the current bandwidth of their respective NR transmitting signal baseband processors to NewBW1~N=10M+DL_BW_Ctrl1~N*Step1~N according to the current value of DL_BW_Ctrl1~N, and their transmitting channels transmit NR 800M signals according to the bandwidth of NewBW1~N. Among them, the step size Step1~N can be the same or different, depending on the distance between NR 800M / 15M base stations 1~N and GSM-R 900MHz / 4MHz base stations. Generally, the farther away (less interference) the step size Stepi is, and the closer (more interference) the step size Stepi is.

[0189] (5) The receiving channel (800M / 15MHZ) in the GSM-R base station receives the downlink radio frequency signals of NR base stations 1 to N (interference signals after superposition and mixing of the transmitted signals of N NR base stations).

[0190] (6) The NR downlink signal interference detector in the GSM-R base station detects the total interference level of the NR downlink signal in NR base stations 1 to N;

[0191] (7) If the total interference level of the NR downlink signal does not exceed the safety threshold, then proceed to step (8); if it exceeds the safety threshold, then proceed to step (9).

[0192] (8) NR-DL-Det outputs a high level, then jumps to step (3);

[0193] (9) NR-DL-Det outputs a low level;

[0194] (10) In the GSM-R base station, the NR downlink signal bandwidth controller decrements the values ​​of DL_BW_Ctrl1~N by 1 (DL_BW_Ctrl1~N--) and outputs them to NR 800M / 15M base station 1~N;

[0195] (11) NR 800M / 15M base stations 1~N adjust the current bandwidth of their respective NR transmission signal baseband processors to NewBW1~N=10M+DL_BW_Ctrl1~N*Step1~N according to the current value of DL_BW_Ctrl1~N, and their transmission channels transmit NR 800M signals according to the bandwidth of NewBW1~N;

[0196] (12) Repeat steps (3) to (11) at intervals to eliminate the uplink interference of 800M NR 15M spread spectrum refarming to 900M GSM-R along the railway, ensure the safe operation of the railway system, maximize the utilization of 800M NR spread spectrum bandwidth, improve the spectrum efficiency of 800M NR spread spectrum refarming system, and improve the network performance and user experience of 800M NR.

[0197] It should be noted that, for safety reasons, bandwidth adjustment from 10MHz to 15MHz is prioritized, and this application embodiment also supports bandwidth adjustment from 15MHz to 10MHz. This application embodiment also supports an emergency recovery mechanism for NR downlink signal bandwidth under abnormal faults. That is, when the NR downlink signal interference detector or NR downlink signal bandwidth controller fails, the GSM-R base station automatically triggers the "DL_BW_Ctrl1~N reset to 0" command to forcibly restore the bandwidth of all NR base stations around the GSM-R to a safe 10M bandwidth, and at the same time sends an alarm signal to the operation and maintenance platform to clarify the fault diagnosis and emergency handling process. This application embodiment also supports gradually increasing the NR 800M bandwidth to detect the GSM-R uplink noise floor, so that the GSM-R uplink noise floor rises below the (safe) noise floor threshold to gradually increase the NR 800M bandwidth until it approaches the noise floor threshold and locks the maximum NR 800M bandwidth.

[0198] The bandwidth control method provided in this application dynamically changes the 800M NR operating bandwidth based on propagation loss. By installing NR downlink signal receiving channels, NR downlink signal interference detectors, and NR downlink signal bandwidth controllers at GSM-R base stations along railway lines, the GSM-R base stations dynamically adjust the downlink bandwidth of all surrounding 800M NR base stations when no trains are passing, thus eliminating uplink interference from 800M NR 15M spread spectrum refarming base stations to the 900M GSM-R system. By detecting downlink signal interference, the downlink bandwidth of 800M NR base stations along the railway line is dynamically changed to balance interference protection and spectrum efficiency. Through a collaborative mode where the GSM-R 900M base station leads the bandwidth adjustment of the NR 800M base station, the limitations of traditional NR systems' autonomous bandwidth control are overcome. Utilizing the railway scene perception capabilities of the GSM-R base stations, direct linkage between the interference source and the interfered system is achieved. Using the NR downlink reference signal received power (RSRP) as an interference assessment indicator, interference closed-loop adjustment based on NR RSRP is implemented. This, combined with high and low level signals outputting safety thresholds, drives the NR downlink signal bandwidth controller to dynamically increase or decrease control parameters, addressing the difficulty of quantifying interference levels in existing technologies. An 800MHz NR downlink signal interference detector and NR downlink signal bandwidth controller are integrated into a 900MHz GSM-R base station. Through a closed-loop logic of interference detection-bandwidth adjustment-re-detection, the bandwidth is optimized in real-time based on the total NR downlink interference level, avoiding over-adjustment or under-adjustment. This ensures the safety of railway operations while maximizing the utilization of the NR 800MHz spread spectrum bandwidth, achieving a balance between safety and efficiency. Differentiated step size adaptation allows for setting different step sizes for NR base stations at different distances from GSM-R base stations (larger step size for less interference at long distances, smaller step size for greater interference at close distances), improving bandwidth adjustment flexibility and enhancing spectrum utilization and interference control accuracy. It supports two modes for NR base stations: "same" and "different" transmit and receive bandwidths (e.g., initial receive bandwidth can be set to 15M or 10M), adapting to different network deployment needs and offering better compatibility than existing fixed bandwidth matching schemes. Multi-base station parallel / serial adjustment compatibility allows for simultaneous or step-by-step increments of bandwidth control signals for N NR base stations, adapting to rapid adjustment needs in dense deployment scenarios as well as smooth adjustment in dispersed deployment scenarios, offering far greater flexibility than existing single adjustment methods.

[0199] This method maximizes the utilization of 800MHz NR spread spectrum bandwidth while ensuring railway safety, improving the spectrum efficiency, resource utilization, and networking flexibility of the 800MHz NR spread spectrum network, and reducing the construction and operation costs of 800MHz NR, demonstrating significant economic benefits and application prospects. It eliminates uplink interference from the 800MHz NR spread spectrum bandwidth to 900MHz GSM-R, ensuring the stability of critical communication links such as railway dispatching and train control, and reducing train operation safety risks. Interference control is achieved through the modification of GSM-R base stations, eliminating the need for new NR interference control equipment, reducing the construction and operation costs of NR networks along railway lines, and featuring low complexity, ease of system implementation and solution promotion, thus possessing broad practical application prospects. It adapts to bandwidth optimization and adjustment scenarios where GSM-R and NR base stations are deployed at different distances along railway lines, reducing manual intervention and enhancing scenario adaptability; it supports the coordinated adjustment of N NR base stations, adapting to the networking requirements of multiple NR base stations corresponding to a single GSM-R base station along railway lines, improving the flexibility of NR network deployment; it complies with the 3GPP NR bandwidth adjustment protocol and railway GSM-R communication standards, providing a reusable technical solution for cross-industry frequency band collaboration in communication and transportation; and it is conducive to the widespread deployment and rapid development of 800M NR spread spectrum refarming equipment.

[0200] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0201] Based on the same inventive concept, this application also provides a bandwidth control device for implementing the bandwidth control method described above. The solution provided by this device is similar to the implementation described in the above method; therefore, the specific limitations in one or more bandwidth control device embodiments provided below can be found in the limitations of the bandwidth control method described above, and will not be repeated here.

[0202] In one exemplary embodiment, such as Figure 9As shown, a bandwidth control device 900 is provided, applied to a GSM-R base station for railway use in the Global System for Mobile Communications (GSM-R), comprising: a first transmitting module 902, a first determining module 904, and a second determining module 906, wherein:

[0203] The first transmitting module 902 is used to transmit bandwidth control signals to each New Radio (NR) base station when there is no train running. The bandwidth control signal includes an adjustment base. The bandwidth control signal is used to instruct each NR base station to adjust the occupied bandwidth based on the adjustment base. The NR base station operates in a second target frequency band. The second target frequency band and the first target frequency band meet preset conditions.

[0204] The first determining module 904 is used to determine the signal interference value after each NR base station has completed bandwidth adjustment;

[0205] The second determining module 906 is used to redetermine the adjustment base number based on the signal interference value and jump to the step of sending bandwidth control signals to each new air interface (NR) base station until the target adjustment base number that meets the spread spectrum conditions is determined, and then send bandwidth control signals to each NR base station, wherein the bandwidth control signals include the target adjustment base number.

[0206] The bandwidth control device provided in this application embodiment achieves interference control through GSM-R base station modification, dynamically changes the bandwidth occupied by NR base station, and eliminates interference of spread spectrum base station to GSM-R uplink signal while spreading spectrum base station, ensuring the stability of key communication links such as railway dispatching and train control. At the same time, it reduces manual intervention in the base station spread spectrum process, improves the overall performance of NR base station and the flexibility and resource utilization of spread spectrum network.

[0207] In one embodiment, determining the signal interference value includes:

[0208] The downlink radio frequency signals of each NR base station are received through the receiving channel corresponding to the second target frequency band, and the signal interference value is determined based on the downlink radio frequency signals.

[0209] Alternatively, noise signals can be received through a receiving channel corresponding to the first target frequency band, and the signal interference value can be determined based on the noise signals.

[0210] In one embodiment, the spreading condition includes the target adjustment base being the maximum value that makes the signal interference value less than or equal to the interference threshold.

[0211] In one embodiment, the device further includes:

[0212] The second transmitting module is used to send a first bandwidth initialization signal to each of the NR base stations. The first bandwidth initialization signal is used to instruct each of the NR base stations to set the occupied bandwidth to a first bandwidth, which is the original occupied bandwidth of the NR base station before spread spectrum.

[0213] In one embodiment, the step of redetermining the adjustment base based on the signal interference value includes:

[0214] If the signal interference value is less than or equal to the interference threshold, the adjustment base is increased by a preset value to obtain a new adjustment base, and the initial value of the adjustment base is 0.

[0215] Alternatively, if the signal interference value is greater than the interference threshold, the adjustment base is reduced by the preset value to obtain the target adjustment base.

[0216] In one embodiment, the device further includes:

[0217] The third transmitting module is used to send a second bandwidth initialization signal to each of the NR base stations. The second bandwidth initialization signal is used to instruct each of the NR base stations to set the occupied bandwidth to the second bandwidth, which is the target occupied bandwidth of the NR base station after spread spectrum.

[0218] In one embodiment, the step of redetermining the adjustment base based on the signal interference value includes:

[0219] If the signal interference value is greater than the interference threshold, the adjustment base is increased by a preset value to obtain a new adjustment base, the initial value of which is 0.

[0220] Alternatively, if the signal interference value is less than or equal to the interference threshold, the adjustment base number can be used as the target adjustment base number.

[0221] In one embodiment, sending bandwidth control signals to each new air interface (NR) base station includes:

[0222] Bandwidth control signals are sent to each of the NR base stations in parallel.

[0223] Alternatively, bandwidth control signals may be sent serially to each of the NR base stations.

[0224] In one exemplary embodiment, such as Figure 10 As shown, a bandwidth control device 1000 is provided, applied to a new radio (NR) base station, including: a first receiving module 1002 and a determining module 1004, wherein:

[0225] The first receiving module 1002 is used to receive the bandwidth control signal sent by the Global System for Mobile Communications - Railway Dedicated GSM-R base station, the bandwidth control signal including the adjustment base number;

[0226] The determination module 1004 is used to determine the target occupied bandwidth based on the adjustment base in response to the bandwidth control signal, and to transmit the NR signal using the target occupied bandwidth.

[0227] The bandwidth control device provided in this application embodiment achieves interference control through GSM-R base station modification, dynamically changes the bandwidth occupied by NR base station, and eliminates interference of spread spectrum base station to GSM-R uplink signal while spreading spectrum base station, ensuring the stability of key communication links such as railway dispatching and train control. At the same time, it reduces manual intervention in the base station spread spectrum process, improves the overall performance of NR base station and the flexibility and resource utilization of spread spectrum network.

[0228] In one embodiment, determining the target bandwidth usage based on the adjustment base includes:

[0229] The adjustment amplitude is determined based on the adjustment base number and the adjustment step size corresponding to the NR base station;

[0230] The target bandwidth is determined based on the current bandwidth usage and the adjustment value.

[0231] In one embodiment, the device further includes:

[0232] The second receiving module is used to receive the first bandwidth initialization signal sent by the GSM-R base station;

[0233] The first response module is configured to respond to the first bandwidth initialization signal by setting the currently occupied bandwidth to the first bandwidth, wherein the first bandwidth is the original occupied bandwidth of the NR base station before spread spectrum, and the target occupied bandwidth is the sum of the first bandwidth and the adjustment amplitude.

[0234] In one embodiment, the device further includes:

[0235] The third receiving module is used to receive the second bandwidth initialization signal sent by the GSM-R base station;

[0236] The second response module is used to respond to the second bandwidth initialization signal by setting the currently occupied bandwidth to the second bandwidth, where the second bandwidth is the target occupied bandwidth after the NR base station is spread, and the target occupied bandwidth is the difference between the second bandwidth and the adjustment amplitude.

[0237] Each module in the aforementioned bandwidth control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the operations corresponding to each module.

[0238] In one embodiment, a communication device is provided, see [link to previous document]. Figure 11 . Figure 11 This is a schematic diagram of the structure of the communication device provided in the embodiments of this application. Figure 11 The communication device 1100 shown includes at least one processor 1101, a memory 1102, at least one network interface 1104, and a user interface 1103. The various components in the communication device 1100 are coupled together via a bus system 1105. It is understood that the bus system 1105 is used to implement communication between these components. In addition to a data bus, the bus system 1105 also includes a power bus, a control bus, and a status signal bus. However, for clarity, ... Figure 11 Various buses are labeled as bus system 1105. In addition, this application embodiment also includes a transceiver 1106, which may be multiple elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium.

[0239] The user interface 1103 may include a display, keyboard, or clicking device (e.g., mouse, trackball, touchpad, or touchscreen).

[0240] It is understood that the memory 1102 in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1102 of the systems and methods described in this application is intended to include, but is not limited to, these and any other suitable types of memory.

[0241] In some implementations, memory 1102 stores elements, executable modules or data structures, or subsets thereof, or extended sets thereof: operating system 11021 and application program 11022.

[0242] The operating system 11021 includes various system programs, such as the framework layer, core library layer, and driver layer, used to implement various basic business functions and handle hardware-based tasks. The application program 11022 includes various applications, such as a media player and a browser, used to implement various application functions. The program implementing the method of this embodiment can be included in the application program 11022.

[0243] The methods disclosed in some or all of the above embodiments of this application can also be applied to processor 1101, or implemented by processor 1101, or implemented by processor 1101 in conjunction with other components (e.g., transceivers). Processor 1101 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 1101 or by instructions in the form of software. The processor 1101 may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can reside in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory 1102. Processor 1101 reads the information in memory 1102 and, in conjunction with its hardware, completes the steps of the above method.

[0244] It is understood that the embodiments described in this application can be implemented using hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in this application, or combinations thereof.

[0245] For software implementation, the technology described in the embodiments of this application can be implemented by modules (e.g., procedures, functions, etc.) that perform the functions described in the embodiments of this application. The software code can be stored in memory and executed by processor 401. The memory can be implemented in processor 1101 or external to processor 1101.

[0246] Those skilled in the art will understand that Figure 11 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the communication device to which the present application is applied. Specific communication devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0247] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0248] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0249] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0250] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0251] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0252] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A bandwidth control method, characterized in that, The method, applied to a GSM-R base station dedicated to railways in the Global System for Mobile Communications (GSM-R), wherein the GSM-R base station operates in a first target frequency band, includes: During periods when no trains are running, a bandwidth control signal is sent to each New Radio (NR) base station. The bandwidth control signal includes an adjustment base number. The bandwidth control signal is used to instruct each NR base station to adjust the occupied bandwidth based on the adjustment base number. The NR base station operates in a second target frequency band, and the second target frequency band and the first target frequency band meet preset conditions. After each NR base station completes bandwidth adjustment, the signal interference value is determined; Based on the signal interference value, the adjustment base number is re-determined, and the process proceeds to the step of sending bandwidth control signals to each new air interface (NR) base station until a target adjustment base number that meets the spread spectrum conditions is determined. Then, a bandwidth control signal is sent to each NR base station, and the bandwidth control signal includes the target adjustment base number.

2. The method according to claim 1, characterized in that, The determination of the signal interference value includes: The downlink radio frequency signals of each NR base station are received through the receiving channel corresponding to the second target frequency band, and the signal interference value is determined based on the downlink radio frequency signals. Alternatively, noise signals can be received through a receiving channel corresponding to the first target frequency band, and the signal interference value can be determined based on the noise signals.

3. The method according to claim 1 or 2, characterized in that, The spread spectrum condition includes the target adjustment base being the maximum value that makes the signal interference value less than or equal to the interference threshold.

4. The method according to claim 3, characterized in that, The method further includes: A first bandwidth initialization signal is sent to each of the NR base stations. The first bandwidth initialization signal is used to instruct each of the NR base stations to set the occupied bandwidth to a first bandwidth, which is the original occupied bandwidth of the NR base station before spread spectrum.

5. The method according to claim 4, characterized in that, The process of redetermining the adjustment base based on the signal interference value includes: If the signal interference value is less than or equal to the interference threshold, the adjustment base is increased by a preset value to obtain a new adjustment base, and the initial value of the adjustment base is 0. Alternatively, if the signal interference value is greater than the interference threshold, the adjustment base is reduced by the preset value to obtain the target adjustment base.

6. The method according to claim 3, characterized in that, The method further includes: A second bandwidth initialization signal is sent to each of the NR base stations. The second bandwidth initialization signal is used to instruct each of the NR base stations to set the occupied bandwidth to the second bandwidth, which is the target occupied bandwidth of the NR base station after spread spectrum.

7. The method according to claim 6, characterized in that, The process of redetermining the adjustment base based on the signal interference value includes: If the signal interference value is greater than the interference threshold, the adjustment base is increased by a preset value to obtain a new adjustment base, the initial value of which is 0. Alternatively, if the signal interference value is less than or equal to the interference threshold, the adjustment base number can be used as the target adjustment base number.

8. The method according to claim 1, characterized in that, Sending bandwidth control signals to each new air interface (NR) base station includes: Bandwidth control signals are sent to each of the NR base stations in parallel. Alternatively, bandwidth control signals may be sent serially to each of the NR base stations.

9. A bandwidth control method, characterized in that, Applied to New Radio (NR) base stations, the method includes: Receive bandwidth control signals transmitted by GSM-R base stations dedicated to railways from the Global System for Mobile Communications - Railway, wherein the bandwidth control signals include adjustment bases; In response to the bandwidth control signal, the target occupied bandwidth is determined based on the adjustment base, and the NR signal is transmitted using the target occupied bandwidth.

10. The method according to claim 9, characterized in that, The determination of the target bandwidth usage based on the adjusted base includes: The adjustment amplitude is determined based on the adjustment base number and the adjustment step size corresponding to the NR base station; The target bandwidth is determined based on the current bandwidth usage and the adjustment value.

11. The method according to claim 10, characterized in that, The method further includes: Receive the first bandwidth initialization signal sent by the GSM-R base station; In response to the first bandwidth initialization signal, the currently occupied bandwidth is set to the first bandwidth, which is the original occupied bandwidth of the NR base station before spread spectrum, and the target occupied bandwidth is the sum of the first bandwidth and the adjustment amplitude.

12. The method according to claim 10, characterized in that, The method further includes: Receive the second bandwidth initialization signal sent by the GSM-R base station; In response to the second bandwidth initialization signal, the currently occupied bandwidth is set to the second bandwidth, which is the target occupied bandwidth after the NR base station is spread, and the target occupied bandwidth is the difference between the second bandwidth and the adjustment amplitude.

13. A bandwidth control device, characterized in that, An application for a dedicated GSM-R base station in the Global System for Mobile Communications (GSM-R) for railways, wherein the GSM-R base station operates in a first target frequency band, the device comprising: The first transmitting module is used to transmit bandwidth control signals to each New Radio (NR) base station when there is no train running. The bandwidth control signal includes an adjustment base number. The bandwidth control signal is used to instruct each NR base station to adjust the occupied bandwidth based on the adjustment base number. The NR base station operates in a second target frequency band. The second target frequency band and the first target frequency band meet preset conditions. The first determining module is used to determine the signal interference value after each NR base station has completed bandwidth adjustment; The second determining module is used to redetermine the adjustment base number based on the signal interference value, and jump to the step of sending bandwidth control signals to each new air interface (NR) base station until a target adjustment base number that meets the spread spectrum conditions is determined, and then send bandwidth control signals to each NR base station, wherein the bandwidth control signals include the target adjustment base number.

14. A bandwidth control device, characterized in that, The device, applied to a new radio (NR) base station, includes: The first receiving module is used to receive the bandwidth control signal sent by the Global System for Mobile Communications - Railway Dedicated GSM-R base station, wherein the bandwidth control signal includes an adjustment base number; The determination module is configured to, in response to the bandwidth control signal, determine the target occupied bandwidth based on the adjustment base, and transmit an NR signal using the target occupied bandwidth.

15. A communication device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 8 or claims 9 to 12.

16. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 8 or claims 9 to 12.

17. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 8 or claims 9 to 12.

Images