Communication dynamic scheduling method, apparatus and medium

Abstract

This application provides a communication dynamic scheduling method, apparatus, and medium, relating to the field of communication technology. The method includes: acquiring first location information, first service type, and first trajectory information of a first terminal; guiding the first terminal to access at least one frequency band of at least one base station based on the first location information and first service type; and predictively adjusting a first uplink timing window for receiving signals from the first terminal in at least one frequency band of at least one base station based on the first location information and first trajectory information. This application, through a location + service dual-driven active scheduling strategy, guides the terminal to access the optimal frequency band cell and predictively adjusts the uplink timing window for the base station to receive terminal signals based on trajectory information, avoiding synchronization failures caused by fixed TA (Transmission Time Acquisition) in high-speed navigation terminals and improving terminal communication performance in high-speed mobile scenarios.

Description

Technical Field

[0001] This application relates to at least the field of communication technology, and in particular to a communication dynamic scheduling method, apparatus and medium. Background Technology

[0002] Existing terminal communication technologies rely solely on passive access modes based on signal strength when accessing a cell, which may not necessarily enable the terminal to access the optimal frequency band cell. When receiving terminal signals, they rely on the TA value update of the "measurement → reporting → transmission" closed loop. In high-speed mobile scenarios, due to feedback delays and measurement cycles, it is difficult to keep up with rapid channel changes, which can easily lead to uplink synchronization failure. Summary of the Invention

[0003] To address the aforementioned shortcomings, this application provides a communication dynamic scheduling method, apparatus, and medium to solve the following technical problems: how to proactively guide terminals to access the optimal frequency band cell and predict the TA to dynamically adjust the uplink timing window, avoiding synchronization failure caused by fixed TA, and improving terminal communication performance in high-speed mobile scenarios.

[0004] In a first aspect, this application provides a communication dynamic scheduling method, the method comprising:

[0005] Obtain the first location information, first service type, and first flight path information of the first terminal;

[0006] Based on the first location information and the first service type, guide the first terminal to access at least one frequency band of at least one base station;

[0007] Based on the first location information and the first trajectory information, predict and adjust the first uplink timing window for receiving signals from the first terminal in at least one frequency band of at least one base station.

[0008] Furthermore, acquiring the first location information, first service type, and first flight path information of the first terminal specifically includes:

[0009] Connect to the Automatic Identification System (AIS) to obtain vessel location and track information;

[0010] Based on the ship's location, obtain all terminals on ships that have network communication needs that fall within the preset service range;

[0011] Obtain the first location information, first service type, and first trajectory information of each first terminal among all terminals.

[0012] Furthermore, among which:

[0013] The first location information is obtained by combining the ship's location information with the terminal's Global Navigation Satellite System (GNSS) positioning or network-side time advance (TA) estimation.

[0014] The first business type includes at least one of the following: eMBB high-definition video service, mMTCL sensor data service, and URLLC remote control service;

[0015] The first track information includes a first speed v and a first heading θ obtained from the ship's track information, wherein the first heading θ is the angle between the direction of the first speed v and at least one base station accessed by the first terminal.

[0016] Furthermore, based on the first location information and the first service type, the first terminal is guided to access at least one frequency band of at least one base station, specifically including:

[0017] Based on the first location information, obtain several frequency bands of several base stations covering the first terminal;

[0018] Obtain the first frequency band preference list for each frequency band combination of each base station that meets the service quality requirements of the first service type under the current network load;

[0019] The first frequency band preference list is sent to the first terminal to guide the first terminal to access at least one frequency band of at least one base station according to the first frequency band preference list.

[0020] Furthermore, among which:

[0021] Several frequency bands include at least one of the following: the ultra-long-range coverage layer 900MHz band, the mid-range capacity layer 2.1GHz band, and the near-shore hotspot layer 3.5GHz band. The 900MHz band is achieved by using a lens antenna and 4T4R receiver diversity on the base station. The 2.1GHz band is achieved by superimposing an NR 2.1GHz radio frequency module and antenna system on the 4G base station. The 3.5GHz band is achieved by using a high-gain directional antenna on the base station.

[0022] The first frequency band preference list includes at least one of the following: a 3.5 GHz band that meets eMBB high-definition video service requirements, or a combination of a 2.1 GHz band and a 900 MHz band that meets eMBB high-definition video service requirements, a 900 MHz band that meets mMTCL sensor data requirements, and a 2.1 GHz band that meets URLLC remote control requirements, and their priority order.

[0023] Furthermore, after the first terminal accesses at least one frequency band of at least one base station according to the first frequency band preference list, the method further includes:

[0024] If the first terminal accesses the 900MHz frequency band, the Dynamic Spectrum Sharing (DSS) application will dynamically allocate resources for the first terminal's services at the subframe level. The resources will be either 5G New Radio (NR) resources or 4G Long Term Evolution (LTE) resources.

[0025] If the first terminal accesses the combination of the 2.1GHz and 900MHz frequency bands, cross-band carrier aggregation (CA) is enabled to activate dual connectivity for the first terminal in the 900MHz primary cell PCell and the 2.1GHz secondary cell SCell.

[0026] Furthermore, based on the first location information and the first trajectory information, a first uplink timing window is predicted and adjusted for receiving signals from the first terminal in at least one frequency band of at least one base station, specifically including:

[0027] Based on the current first location information (x0, y0) and first track information (v, θ) of the first terminal, predict the second location information of the first terminal t seconds later. );

[0028] The center of the first uplink timing window for receiving the signal from the first terminal after dynamically extending at least one frequency band of at least one base station to τ=2d / c, and the width of the first uplink timing window is proportional to v;

[0029] Where v is the current first speed of the first terminal, θ is the angle between the direction of v and at least one base station accessed by the first terminal, and θ is the distance between the first terminal and at least one base station accessed. c is the speed of light.

[0030] Furthermore, among which:

[0031] The first terminal is located on the navigation vehicle, and the first track information is obtained based on the track information of the navigation vehicle, without relying on communication with the first terminal;

[0032] The signal of the first terminal adopts the Physical Random Access Channel (PRACH) long sequence format, which supports a maximum round-trip propagation delay corresponding to a coverage radius of 100km.

[0033] Secondly, this application provides a communication dynamic scheduling device, the device comprising:

[0034] The acquisition module is used to acquire the first location information, the first service type, and the first flight path information of the first terminal;

[0035] A guidance access module, connected to an acquisition module, is used to guide a first terminal to access at least one frequency band of at least one base station based on first location information and a first service type;

[0036] The prediction and adjustment module, connected to the guidance and access module, is used to predict and adjust the first uplink timing window for receiving signals from the first terminal in at least one frequency band of at least one base station based on the first location information and the first track information.

[0037] Thirdly, this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the communication dynamic scheduling method described above.

[0038] This application provides a communication dynamic scheduling method, device, and medium. Through a location + service dual-driven active scheduling strategy, it guides the terminal to access the optimal frequency band cell and predictively adjusts the uplink timing window for the base station to receive terminal signals based on flight track information. This avoids synchronization failure problems caused by fixed TA for high-speed navigation terminals and improves the terminal communication effect in high-speed mobile scenarios. Attached Figure Description

[0039] Figure 1 This is a flowchart of a communication dynamic scheduling method according to an embodiment of this application;

[0040] Figure 2 This is an architecture diagram of a communication dynamic scheduling system according to an embodiment of this application;

[0041] Figure 3 This is a schematic diagram of a layered marine coverage according to an embodiment of this application;

[0042] Figure 4 This is a flowchart of another communication dynamic scheduling method according to an embodiment of this application;

[0043] Figure 5 This is a schematic diagram of a PRACH long sequence format according to an embodiment of this application;

[0044] Figure 6 This is a schematic diagram of the structure of a communication dynamic scheduling device according to an embodiment of this application;

[0045] Figure 7 This is a schematic diagram of the structure of a computer-readable storage medium according to an embodiment of this application;

[0046] Figure 8 This is a schematic diagram of the structure of a computer device according to an embodiment of this application. Detailed Implementation

[0047] To enable those skilled in the art to better understand the technical solution of this application, the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0048] It is understood that the specific embodiments and accompanying drawings described herein are merely for explaining this application and are not intended to limit this application.

[0049] It is understood that, without conflict, the various embodiments and features in the embodiments of this application can be combined with each other.

[0050] It is understood that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, while parts unrelated to this application are not shown in the drawings.

[0051] It is understood that each module or unit involved in the embodiments of this application may correspond to only one entity structure, or may be composed of multiple entity structures, or multiple modules or units may be integrated into one entity structure.

[0052] It is understood that, without conflict, the functions and steps marked in the flowcharts and block diagrams of this application may occur in a different order than that marked in the accompanying drawings.

[0053] It is understood that the flowcharts and block diagrams of this application illustrate the possible architecture, functions, and operations of systems, apparatuses, devices, and methods according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, unit, program segment, or code, containing executable instructions for implementing the specified function. Furthermore, each block or combination of blocks in the block diagrams and flowcharts may be implemented using a hardware-based device to implement the specified function, or using a combination of hardware and computer instructions.

[0054] It is understood that the modules and units involved in the embodiments of this application can be implemented by software or by hardware. For example, the modules and units can be located in the processor.

[0055] Example 1:

[0056] like Figure 1 As shown, this application provides a communication dynamic scheduling method, the method comprising:

[0057] S1. Obtain the first location information, first service type, and first flight track information of the first terminal;

[0058] S2. Based on the first location information and the first service type, guide the first terminal to access at least one frequency band of at least one base station;

[0059] S3. Based on the first location information and the first trajectory information, predict and adjust the first uplink timing window for receiving signals from the first terminal in at least one frequency band of at least one base station.

[0060] In this embodiment, the provided method guides the terminal to access the optimal frequency band cell through a location + service dual-driven active scheduling strategy, and predictively adjusts the uplink timing window for the base station to receive terminal signals based on flight track information, thereby avoiding synchronization failure problems caused by fixed TA for high-speed navigation terminals and improving terminal communication performance in high-speed mobile scenarios.

[0061] Specifically, this embodiment provides a multi-band collaborative networking and dynamic scheduling method for ultra-long-range coverage in maritime areas, which includes at least the following key technical points:

[0062] Frequency band active guidance mechanism: Real-time acquisition of the terminal's location from the shore, combined with service type (such as video, IoT, voice) and QoS requirements (eMBB / mMTC / URLLC), actively issues frequency band camping or switching instructions (such as RRC reconfiguration) to guide the terminal to access the optimal frequency band cell. This "location + service" dual-driven active scheduling strategy is different from the passive access mode that only relies on signal strength in the existing technology.

[0063] Adaptive TA Joint Optimization Scheme: Introducing a TA prediction algorithm based on AIS speed / heading to dynamically adjust the uplink timing window and solve the synchronization failure problem caused by fixed TA in high-speed offshore terminals.

[0064] While traditional telemetry (TA) systems are dynamically updated, they rely on a closed loop of "measurement → reporting → transmission." In ultra-long-distance, high-speed mobile scenarios at sea, limited by feedback delays and measurement cycles, they struggle to keep up with rapid channel changes, easily leading to uplink synchronization issues, essentially functioning as a "fixed TA." This embodiment employs AIS feedforward prediction combined with dynamic receiver window adjustment: based on real-time ship trajectory prediction of future propagation delays, the uplink timing window is actively moved and expanded, allowing the base station to "align" with the terminal signal in advance. This eliminates the need for a closed-loop TA command, effectively ensuring synchronization reliability at sea. This joint optimization mechanism is a key physical layer enhancement for achieving reliable access at the 100-kilometer level.

[0065] In one embodiment, S1, obtaining the first location information, first service type, and first flight path information of the first terminal, specifically includes:

[0066] Connect to the Automatic Identification System (AIS) to obtain vessel location and track information;

[0067] Based on the ship's location, obtain all terminals on ships that have network communication needs that fall within the preset service range;

[0068] Obtain the first location information, first service type, and first trajectory information of each first terminal among all terminals.

[0069] In this embodiment, the core technologies include: three-layer frequency band coordination, AIS (Automatic Identification System) driven scheduling, and DSS (Dynamic Spectrum Sharing) + CA (Carrier Aggregation) joint optimization.

[0070] Currently, the marine economy has created an urgent demand for 5G networks. Scenarios such as offshore energy development, marine ranching, fishing vessel monitoring, island security, and maritime search and rescue all rely on stable and high-speed wireless communication capabilities. However, due to the lack of obstructions on the sea surface and the near-free-space propagation environment, while it is conducive to line-of-sight (LoS) propagation, it also places special requirements on base station deployment, frequency band selection, and coverage strategies.

[0071] In existing technologies, the industry commonly uses shore-based macro base stations to provide 5G ultra-long-range coverage over the sea. Typical practices include:

[0072] Single-band coverage: such as using only 900MHz NR to achieve basic communication in the open sea, or using only 3.5GHz NR to serve high-capacity areas near the coast;

[0073] Static frequency band allocation: different frequency band sites operate independently, and terminals passively access the network based on signal strength, lacking an active guidance mechanism based on location and service type;

[0074] Traditional PRACH format and fixed TA mechanism: prone to problems such as uplink synchronization failure and low access success rate at ultra-long distances (>50km);

[0075] The lack of dynamic spectrum sharing (DSS) or cross-band carrier aggregation has resulted in low utilization of low-frequency resources, making it impossible to meet the needs of both existing 4G users and new 5G users.

[0076] Some studies have attempted to expand coverage by increasing antenna height, optimizing propagation models, and adjusting base station power, but they have not systematically solved the "coverage-capacity" contradiction and lack a three-dimensional collaborative networking architecture for continuous sea areas.

[0077] The main drawbacks of existing technologies include:

[0078] Coverage and capacity are difficult to balance: Low-frequency bands (such as 900MHz) can achieve ultra-long-range coverage, but they have narrow bandwidth and small system capacity; High-frequency bands (such as 3.5GHz) have large capacity but limited coverage radius (usually <20km), which cannot meet the needs of long-distance maritime communication.

[0079] Static and rigid networking methods: Existing solutions are mostly deployed on fixed frequency bands, lacking the ability to dynamically schedule access frequency bands based on terminal location and service type, resulting in an uneven user experience.

[0080] Low spectrum resource utilization efficiency: Low frequency bands are often monopolized by 4G, failing to effectively support the smooth evolution of 5G; lack of dynamic spectrum sharing mechanism results in resource waste.

[0081] Uplink synchronization difficulties over ultra-long distances: Traditional TA (Timing Advance) mechanisms cannot accurately compensate for propagation delays in scenarios >50km, affecting access performance.

[0082] In view of this, the purpose of this embodiment is:

[0083] This paper presents a multi-band collaborative networking and dynamic scheduling method for marine areas. By constructing a three-layer coverage architecture of "near-mid-far", and combining intelligent terminal guidance, dynamic spectrum sharing and cross-band carrier aggregation technology, it can provide differentiated capacity services on demand while ensuring ultra-long-range coverage of hundreds of kilometers, thereby achieving unified optimization of the coverage breadth and service carrying capacity of marine communication networks.

[0084] In one embodiment, wherein:

[0085] The first location information is obtained by combining the ship's location information with the terminal's Global Navigation Satellite System (GNSS) positioning or network-side time advance (TA) estimation.

[0086] The first business type includes at least one of the following: eMBB high-definition video service, mMTCL sensor data service, and URLLC remote control service;

[0087] The first track information includes a first speed v and a first heading θ obtained from the ship's track information, wherein the first heading θ is the angle between the direction of the first speed v and at least one base station accessed by the first terminal.

[0088] In this embodiment, as Figure 2 As shown, a multi-band three-dimensional cooperative networking system for marine areas is proposed, which includes shore-based multi-frequency base stations, location sensing modules, scheduling controllers, DSS units, and terminals. The modules are interconnected through Xn / N2 interfaces, and the core functions of the modules are as follows:

[0089] Multi-band shore-based base station cluster: Deployment of NR900MHz (ultra-long-range coverage layer), NR2.1GHz (mid-range capacity layer), and NR3.5GHz (nearshore hotspot layer);

[0090] Location awareness and service identification unit: Obtains the distance from the terminal to the coast through AIS automatic identification system, terminal GNSS (Global Navigation Satellite System) positioning, or network-side TA estimation;

[0091] Intelligent frequency band scheduling controller: Based on location, service type (such as video surveillance, IoT data backhaul, voice, etc.), and network load, it dynamically generates access guidance policies. These policies refer to the frequency band retention or reselection instructions dynamically generated and sent to the terminal by the network side based on the terminal's location (such as distance from the shore), service type (such as eMBB / mMTC / URLLC), and network load status. This policy is issued in the form of a "frequency priority list" in the RRC reconfiguration message, containing priority-ordered NR frequency bands (e.g., 900MHz is preferred over 2.1GHz), guiding the terminal to actively reselect to the optimal cell, rather than relying solely on passive handover via RSRP.

[0092] Dynamic Spectrum Sharing (DSS) module: On the 900MHz band, time slot resources are allocated to 4G / 5G users on demand. "Dynamic Spectrum Sharing" (DSS) refers to dynamically allocating time slot resources to 4G LTE and 5G NR users on the same 900MHz FDD carrier through symbol-level or subframe-level resource scheduling. It shares the same physical spectrum resources (such as 5MHz bandwidth), flexibly slicing them in the time dimension to achieve coexistence of 4G and 5G, avoiding the need to allocate separate frequency bands for 5G, thereby improving low-frequency spectrum utilization efficiency.

[0093] Cross-band carrier aggregation (CA) engine: In coverage overlap areas (such as 15~30km), 900+2.1GHz CA is enabled for multi-frequency terminals to improve speed and link robustness.

[0094] In one embodiment, S2, based on the first location information and the first service type, guides the first terminal to access at least one frequency band of at least one base station, specifically including:

[0095] Based on the first location information, obtain several frequency bands of several base stations covering the first terminal;

[0096] Obtain the first frequency band preference list for each frequency band combination of each base station that meets the service quality requirements of the first service type under the current network load;

[0097] The first frequency band preference list is sent to the first terminal to guide the first terminal to access at least one frequency band of at least one base station according to the first frequency band preference list.

[0098] In this embodiment, a network deployment in a certain sea area along a shipping route is used as a more specific example:

[0099] Intelligent terminal guidance mechanism: When the ship's AIS-reported position is greater than 25km from the shore, the core network sends a frequency band preference list via RRC reconfiguration message to guide the terminal to preferentially reselect to a 900MHz cell. The frequency band preference list is the IE (Information Element) carried in the RRC reconfiguration message, with the following format:

[0100] freqPriorityList = [ {carrierFreq: 900MHz, cellReselectionPriority:7}, {carrierFreq: 2100MHz, cellReselectionPriority: 6}, {carrierFreq:3500MHz, cellReselectionPriority: 5} ]

[0101] The higher the numerical value, the higher the priority. Upon receiving the signal, the terminal re-evaluates neighboring cells according to this priority. Even if the current serving cell signal is acceptable, it will proactively reselect a higher priority frequency band (e.g., 900MHz) to achieve network-driven intelligent guidance. If the terminal's service is high-definition video and it is located in an area <10km, it will lock onto 3.5GHz and enable QoS guarantees. "Distance from the coast <10km" means the terminal's current location is less than 10 kilometers from the coastline (e.g., 9.5km). Although this slightly exceeds the theoretical coverage radius of 3.5GHz (8km), in actual deployment, through high-gain antennas (downtilt angle 2°) and the advantage of line-of-sight propagation over the sea, the 3.5GHz signal can extend to within 10km to still meet service requirements. If the terminal initiates a high-definition video service (eMBB) at this time, the network determines that it is in an "effective 3.5GHz coverage area" and forcibly locks onto 3.5GHz and enables QoS guarantees via RRC commands to ensure a good speed experience. In other words, for distances <10km from the coast: 3.5GHz is preferred; for distances >25km from the coast: 900MHz is preferred; and for intermediate sea areas: 2.1GHz is preferred.

[0102] In one embodiment, wherein:

[0103] Several frequency bands include at least one of the following: the ultra-long-range coverage layer 900MHz band, the mid-range capacity layer 2.1GHz band, and the near-shore hotspot layer 3.5GHz band. The 900MHz band is achieved by using a lens antenna and 4T4R receiver diversity on the base station. The 2.1GHz band is achieved by superimposing an NR 2.1GHz radio frequency module and antenna system on the 4G base station. The 3.5GHz band is achieved by using a high-gain directional antenna on the base station.

[0104] The first frequency band preference list includes at least one of the following: a 3.5 GHz band that meets eMBB high-definition video service requirements, or a combination of a 2.1 GHz band and a 900 MHz band that meets eMBB high-definition video service requirements, a 900 MHz band that meets mMTCL sensor data requirements, and a 2.1 GHz band that meets URLLC remote control requirements, and their priority order.

[0105] In this embodiment, as Figure 3 As shown, the horizontal axis represents the distance from the shore (km), and the vertical axis represents the available frequency bands, clearly dividing the coverage areas into 900M (0–92km), 2.1G (0–43.7km), and 3.5G (0–17.9km). Taking a certain route as an example (the typical operating area extends to a depth of over 50km, with some fishing vessels' activity range extending to 80km):

[0106] Nearshore 0–8km: NR3.5GHz cells are deployed at Pingtan Tingshui base station, using high-gain directional antennas (downtilt angle 2°) to cover key offshore aquaculture platforms, fishing port dispatch centers and tourist sightseeing boat fleets. The cell strategy is set to "prioritize 3.5G" to ensure 4K video backhaul and remote control services.

[0107] Mid-range 8–30km: The NR2.1GHz band is superimposed on the Pingtan Houyu Island site (“superimposition” refers to the addition of NR2.1GHz radio frequency modules and antenna systems to the existing base station equipment at the Pingtan Houyu Island site, where only 4G base stations and LTE1.8G equipment were originally deployed) as the main layer of mid-range capacity, supporting concurrent communication of multiple fishing vessels and data aggregation of marine monitoring sensors;

[0108] For sea areas 30–80km and above: The same 4G base station (Liushui Junshan in Pingtan, Fuzhou, refers to the same 4G base station, different from the Pingtan Tingshui base station) is configured with an NR900MHz ultra-long-range coverage layer, employing a Luneburg lens antenna (21dBi gain) and 4T4R (a computer network technology where a base station uses 4 transmit antennas and 4 receive antennas) for receive diversity. The Luneburg lens antenna is a high-gain (measured 21dBi), narrow-beam directional antenna that uses the lens principle to focus energy towards the sea level, significantly improving long-distance signal strength. The ability to overcome free-space path loss and narrow beam characteristics are key to its ability to achieve ultra-long-distance, high signal-to-noise ratio communication (RSRP reaches -82dBm at 70km); 4T4R (4 transmit 4 receive): through multi-antenna receive diversity, multiple signals are combined to improve the signal-to-noise ratio (SNR), enhance uplink robustness, and effectively combat signal fluctuations caused by multipath fading on the sea surface and ship rolling; the measured RSRP still reaches -82dBm at 70km, meeting the needs of AIS, Beidou short message enhancement and emergency voice communication.

[0109] like Figure 4 As shown, the dynamic scheduling process includes: terminal access → obtaining location → determining distance range → matching service QoS → outputting target frequency band → executing reselection / CA / DSS configuration.

[0110] In one embodiment, after the first terminal accesses at least one frequency band of at least one base station according to a first frequency band preference list, the method further includes:

[0111] If the first terminal accesses the 900MHz frequency band, the Dynamic Spectrum Sharing (DSS) application will dynamically allocate resources for the first terminal's services at the subframe level. The resources will be either 5G New Radio (NR) resources or 4G Long Term Evolution (LTE) resources.

[0112] If the first terminal accesses the combination of the 2.1GHz and 900MHz frequency bands, cross-band carrier aggregation (CA) is enabled to activate dual connectivity for the first terminal in the 900MHz primary cell PCell and the 2.1GHz secondary cell SCell.

[0113] In this embodiment, the key technology also includes:

[0114] Dynamic Spectrum Sharing (DSS) Application: The 900MHz band uses a 10MHz FDD bandwidth, dynamically allocating resources at the subframe level. During peak fishing seasons in the daytime, the 5G resource share increases to 70%, while automatic fallback at night ensures wide 4G coverage. Subframe-level dynamic allocation: Within each 1ms subframe, the base station DSS module allocates some OFDM symbols to NR PDSCH / PUSCH according to a preset ratio (e.g., 70% NR / 30% LTE during the day), reserving the remaining symbols for LTE CRS / PDSCH. Control signaling (e.g., dss-Configuration in SIB1) informs the terminal which symbols belong to NR (5G New Radio), achieving coexistence. At night, 100% LTE (Long Term Evolution) is used, with the ratio preset or triggered based on traffic volume.

[0115] Cross-band carrier aggregation (CA) activation: In the 8–20km overlap area, dual connectivity of 900MHz (Pcell, Primary cell) + 2.1GHz (Scell, Secondary cell) is activated for terminals (such as shipborne CPEs) supporting EN-DC (E-UTRA-NR DualConnectivity, a non-standalone (NSA) 5G deployment option that allows user devices to simultaneously connect to 4G LTE (E-UTRA) and 5G NR networks). This is triggered by the intelligent frequency band scheduling controller and executed via gNodeB. The process is as follows:

[0116] Terminal reporting capability (supports EN-DC) and measurement report (900M / 2.1G RSRP > -100dBm);

[0117] The scheduler determines that the service rate requirement is > 30Mbps;

[0118] gNodeB requests SCell addition from the core network;

[0119] After the core network is approved, the gNodeB issues an RRC reconfiguration to activate the EN-DC dual connection with 900MHz as PCell and 2.1GHz as SCell.

[0120] The measured downlink speed increased from 45Mbps to 126Mbps per carrier, and the uplink robustness was significantly enhanced. The solution has been successfully verified end-to-end.

[0121] In one embodiment, S3, based on the first location information and the first track information, predicting and adjusting the first uplink timing window for receiving signals from the first terminal in at least one frequency band of at least one base station, specifically includes:

[0122] Based on the current first location information (x0, y0) and first track information (v, θ) of the first terminal, predict the second location information of the first terminal t seconds later. );

[0123] The center of the first uplink timing window for receiving the signal from the first terminal after dynamically extending at least one frequency band of at least one base station to τ=2d / c, and the width of the first uplink timing window is proportional to v;

[0124] Where v is the current first speed of the first terminal, θ is the angle between the direction of v and at least one base station accessed by the first terminal, and θ is the distance between the first terminal and at least one base station accessed. c is the speed of light.

[0125] In this embodiment, an adaptive TA (Timing Advance) prediction algorithm is introduced, which dynamically adjusts the uplink timing window based on AIS airspeed / heading information. The adaptive TA prediction algorithm flow is as follows:

[0126] The ship's current position (x0, y0), speed v, and heading θ are obtained from AIS.

[0127] Predict the position after t seconds:

[0128] Calculate the new distance The propagation delay τ = 2d / c is derived.

[0129] The uplink timing window is dynamically expanded to τ from its center, and its width is adaptively adjusted according to the speed (widened at high speeds).

[0130] This ensures that the terminal's uplink signal falls within the window, resolving the synchronization failure issue of traditional fixed TA under high-speed mobile and offshore terminals.

[0131] In one embodiment, wherein:

[0132] The first terminal is located on the navigation vehicle, and the first track information is obtained based on the track information of the navigation vehicle, without relying on communication with the first terminal;

[0133] The signal of the first terminal adopts the Physical Random Access Channel (PRACH) long sequence format, which supports a maximum round-trip propagation delay corresponding to a coverage radius of 100km.

[0134] In this embodiment, to support the effective implementation of "multi-band collaborative networking and dynamic scheduling" in ultra-distant sea areas, the following key technical parameters and mechanisms have been systematically optimized and constitute the core technology:

[0135] 1. Enhanced mechanism for ultra-long-distance access

[0136] Employing PRACH (Physical Random Access Channel) long sequence format (Format C2 / C3), it supports a maximum round-trip propagation delay corresponding to a coverage radius of 100 km; such as Figure 5 As shown in Table 1, the 5G signal format and coverage radius are as follows: Forme 1 supports 103km.

[0137] Table 1: 5G Signal Format and Coverage Radius

[0138]

[0139] That is, the CP length and GP length of PRACH preamble format 1 are the longest, so its coverage distance is also the farthest. Cell radius = min(CP, GP).

[0140] The radius calculation supported by PRACH Format 1 is as follows: (where 480 represents a subcarrier spacing of 480 kHz, 4096 represents the number of FFT points, and NR reports TA=64Ts)

[0141] Cell radius determined by CP length: First calculate the maximum tolerable delay as: 21240×64×[1 / (480×4096)]=684.9 us, so the cell radius determined by CP length =(0.3×684.9) / 2=102.7 km.

[0142] Cell radius determined by GP length: First calculate the maximum tolerable delay: 21984×64×[1 / (480×4096)]=715.6 us, so the cell radius determined by GP length =(0.3×715.6) / 2=107.3 km.

[0143] Table 2 shows the 4G signal format and coverage radius. The PRACH preamble format Format 2 has the longest coverage distance.

[0144] Table 2: 4G Signal Format and Coverage Radius

[0145]

[0146] 2. Multi-band three-dimensional layered coverage architecture

[0147] Clearly define the three-layer structure:

[0148] 900 MHz NR: Ultra-long coverage (0–92 km), ensuring basic communications and emergency services;

[0149] 2.1 GHz NR: Mid-range capacity layer (0–43.7 km), balancing coverage and throughput;

[0150] 3.5 GHz NR: Near-shore hotspot layer (0–17.9 km), supporting high-bandwidth applications.

[0151] Co-location across all layers reduces construction costs and improves handover continuity through unified site planning and beam coordination.

[0152] 3. Location- and service-based intelligent frequency band scheduling strategy

[0153] The network side integrates AIS ship positioning, GNSS terminal reporting, or TA reverse distance to determine the sea area level where the terminal is located in real time.

[0154] The TA (Time of Arrival) method for distance estimation involves the base station measuring the deviation between the arrival time of the terminal's uplink signal and the expected time to obtain the TA value (unit: Ts = 1 / 30720 ms). The distance estimation formula is as follows: Where c is the speed of light. Considering sea surface LoS propagation, this estimation has high accuracy and can be used as a supplementary positioning method when AIS / GNSS fails.

[0155] Based on service QoS requirements (such as eMBB, mMTC, URLLC), frequency band residency / reselection commands (such as RRC reconfiguration) are dynamically issued to achieve "on-demand access and optimal service." The mapping rules are illustrated below:

[0156] eMBB (high-definition video): Issue commands to lock onto high-bandwidth frequency bands (3.5GHz or 2.1GHz+CA) and configure high GBR;

[0157] mMTC (sensor data): Booted to 900MHz, configured with low-power DRX;

[0158] URLLC (Remote Controlled Frames): Prioritizes allocation of 2.1GHz low-latency subframes and enables Mini-slot scheduling.

[0159] 4. Implementation method of dynamic spectrum sharing (DSS) in the 900 MHz band

[0160] Under the FDD standard, 4G / 5G time slots can be flexibly allocated on the same carrier through symbol-level resource scheduling (in each radio frame (10ms) of a 900MHz FDD carrier, the DSS module dynamically divides symbols according to a strategy).

[0161] For example: Subframes #0–#6: All symbols are used for NR;

[0162] Subframes #7–#9: Some symbols are inserted into LTE CRS, and the rest are transmitted as NR; the MAC layer scheduler adjusts them in real time and broadcasts resource configurations in PBCH / SIB to achieve 4G / 5G symbol-level coexistence.

[0163] Supports load and time-aware spectrum slicing: during peak hours (such as daytime fishing season), priority is given to 5G users, while at night, 4G coverage is maintained. Actual measurements show that low spectrum efficiency is improved by more than 40% (control body: DSS module built-in policy engine).

[0164] Time period determination: based on system time (e.g., 06:00–18:00 is daytime) or real-time user count (>threshold, i.e. peak).

[0165] Safeguard mechanism: During peak periods, 70% of the subframes in the 900MHz band will be allocated to NR, limiting LTE scheduling opportunities;

[0166] Nighttime rollback: Automatically switch to 4G priority from 22:00 to 06:00 (NR ratio ≤30%) to maintain wide coverage;

[0167] "Low spectrum" refers to the 900MHz frequency band (which is a low-frequency resource).

[0168] 5. Cross-band carrier aggregation (CA) triggering and configuration mechanism

[0169] In coverage overlap areas (e.g., 8–30 km), when the terminal meets all of the following conditions:

[0170] Supports EN-DC or multi-frequency NR capability;

[0171] RSRP > -100 dBm for both 900 MHz and 2.1 GHz;

[0172] Service demand rate > threshold (e.g., 30 Mbps);

[0173] Then, 900 MHz (PCell) + 2.1 GHz (SCell) carrier aggregation will be automatically activated (activation subject: intelligent frequency band scheduling controller);

[0174] Information acquisition methods:

[0175] Terminal capabilities: reported via UE Capability Information;

[0176] RSRP: Reported periodically via Measurement Report;

[0177] Service rate requirements: Notified to gNodeB by the core network SMF / QoS Flow.

[0178] Significantly improves user experience speed and link reliability.

[0179] The above parameters and mechanisms together constitute a new paradigm for 5G network deployment in the sea area, integrating coverage, capacity, and efficiency.

[0180] This embodiment proposes and implements for the first time a multi-band collaborative networking and dynamic scheduling method for ultra-long-range coverage scenarios in maritime areas, including at least the following five key technical points:

[0181] 1. Definition and Deployment Method of Three-Layer Layered Coverage Architecture for Marine Areas

[0182] The 900 MHz NR is explicitly defined as the ultra-long-range coverage layer (coverage radius 0–92 km), the 2.1 GHz NR as the mid-range capacity layer (0–43.7 km), and the 3.5 GHz NR as the near-shore hotspot capacity layer (0–17.9 km). It is stipulated that these three layers be deployed in a coordinated manner to form a continuous and seamless "single network" coverage system. This layered logic and its precise coverage boundary setting are original designs specifically tailored to the propagation characteristics and service distribution patterns in free space at sea.

[0183] 2. Location awareness and frequency band active guidance mechanism based on AIS / GNSS / TA fusion

[0184] The network side obtains the terminal's location from shore in real time by parsing ship AIS broadcast information, terminal GNSS reports, or by inferring distance based on TA. Combined with service type (such as video, IoT, and voice) and QoS requirements (eMBB / mMTC / URLLC), it proactively issues frequency band camping or switching commands (such as RRC reconfiguration) to guide the terminal to access the optimal frequency band cell. This proactive scheduling strategy, driven by both location and service, differs from the passive access mode in existing technologies that rely solely on signal strength.

[0185] 3. Maritime adaptation method for supporting 4G / 5G Dynamic Spectrum Sharing (DSS) in the 900 MHz low-frequency band

[0186] On a 900 MHz FDD carrier, symbol-level resource scheduling is employed to dynamically allocate 4G and 5G time slots on the same carrier. It supports a spectrum slicing strategy that is aware of load and operational periods (e.g., increasing the proportion of 5G resources to 70% during peak fishing seasons and reverting to 4G coverage at night), achieving efficient reuse of low-bandwidth spectrum in offshore scenarios. This DSS strategy is deeply coupled with the spatiotemporal characteristics of marine services and represents a creative application.

[0187] 4. Triggering conditions and configuration mechanism for cross-band carrier aggregation (CA) in overlapping coverage areas

[0188] In multi-frequency coverage overlap areas of 8–30 km, for terminals supporting multi-frequency capabilities, when simultaneously satisfying:

[0189] (1) RSRP for both 900 MHz and 2.1 GHz is > -100 dBm;

[0190] (2) Service rate requirement > threshold (e.g., 30 Mbps);

[0191] (3) The terminal supports EN-DC or multi-frequency NR;

[0192] It automatically activates 900 MHz (PCell) + 2.1 GHz (SCell) carrier aggregation, balancing coverage robustness and high throughput. This CA enabling logic is specifically designed for maritime areas and is not disclosed in terrestrial networks or existing patents.

[0193] 5. Joint optimization scheme of ultra-long-distance PRACH format and adaptive TA

[0194] It adopts the PRACH long sequence format (5G Format1, 4G Format3) to support a maximum access distance of 100 km, and introduces a TA prediction algorithm based on AIS speed / heading to dynamically adjust the uplink timing window, thus solving the synchronization failure problem caused by fixed TA in high-speed offshore terminals.

[0195] Although traditional TAs are dynamically updated, they rely on a closed loop of "measurement → reporting → transmission". In scenarios involving long distances and high-speed movement in the open sea, they are limited by feedback delays and measurement cycles, making it difficult to keep up with rapid changes in the channel and easily leading to uplink synchronization failure. Functionally, they are similar to "fixed TAs".

[0196] This embodiment employs AIS feedforward prediction combined with dynamic receiver window adjustment: based on the real-time trajectory of the ship, it predicts future propagation delays and actively moves and expands the uplink timing window, enabling the base station to "align" with the terminal signal in advance. This eliminates the need for TA command closed-loop control, effectively ensuring the reliability of synchronization at sea. This joint optimization mechanism is a key physical layer enhancement for achieving reliable access at the 100-kilometer level.

[0197] The above five technical points form an organic whole, jointly resolving the fundamental contradiction between the "coverage breadth" and "capacity supply" of the sea area.

[0198] This embodiment can also provide some alternative solutions, including:

[0199] Frequency band combination replacement: 700MHz can be used to replace 900MHz as an ultra-long-range coverage layer (allocated to China Broadcasting Network Mobile spectrum);

[0200] Alternatives for location acquisition methods: In addition to AIS, radar positioning, satellite remote sensing assistance, or triangulation based on TA / RSRP can be used;

[0201] Alternative scheduling strategies: Frequency bands can be pre-scheduled based on machine learning models to predict terminal movement trajectories.

[0202] Antenna alternatives: In addition to Luneburg lens antennas, shaped beam scanning or phased array antennas can be used to improve far-point gain;

[0203] Synchronization mechanism alternative: Timing calibration based on NTN (non-terrestrial network) can be introduced.

[0204] This embodiment, through multi-frequency collaboration and dynamic scheduling, includes a complete solution of "layered coverage + location guidance + DSS + ultra-long-range TA optimization," solving the core problems of coverage and capacity separation and static resource allocation, including:

[0205] Frequency band strategy: Construct a three-layer frequency band architecture (900M coverage layer + 2.1G capacity layer + 3.5G hotspot layer). The networking method is entirely based on fixed shore-based sites, requiring no additional platform. The sites are permanently deployed, suitable for the normalized operation of the marine economy. It utilizes existing towers / lighthouses, reuses infrastructure, and has controllable costs. It is suitable for long-term business scenarios such as fisheries management, marine ranching, and waterway monitoring. It is a pure terrestrial wireless network that is compatible with the existing network operation and maintenance system.

[0206] Capacity support: Provides 100Mbps speeds in nearshore areas via mid-to-high frequency bands + CA;

[0207] Scheduling mechanism: proactive guidance, dynamically allocates the optimal frequency band based on AIS location and service type, covering from nearshore to hundreds of kilometers offshore, introduces AIS / GNSS / TA to back-calculate the distance from the shore as the main basis for scheduling, optimizes PRACH format (C2 / C3) + adaptive TA, and supports 100km access;

[0208] Resource Efficiency: By introducing DSS, 4G / 5G resources are dynamically shared on the 900MHz band to improve spectrum efficiency. DSS is mainly used in the 900MHz low-frequency band to ensure basic coverage in the open sea. DSS is scheduled according to the regularity of the operation period in the sea area (such as the concentration of fishing boats during the day to increase the 5G coverage). As a part of the overall sea area network, DSS works in conjunction with frequency band guidance, CA, and TA optimization to maintain wide coverage under extremely low user density, while supporting sudden high bandwidth demands (such as video from fish rafts).

[0209] Problem identification: Simultaneously solve the problems of "coverage in the far seas + capacity in the near seas + efficient scheduling across the entire region".

[0210] Example 2:

[0211] like Figure 6 As shown, this application provides a communication dynamic scheduling device, the device comprising:

[0212] Module 1 is used to acquire the first location information, first service type, and first flight path information of the first terminal;

[0213] The access guidance module 2, connected to the acquisition module 1, is used to guide the first terminal to access at least one frequency band of at least one base station based on the first location information and the first service type.

[0214] The prediction and adjustment module 3, connected to the guidance and access module 2, is used to predict and adjust the first uplink timing window for receiving signals from the first terminal in at least one frequency band of at least one base station based on the first location information and the first track information.

[0215] In one embodiment, the acquisition module 1 specifically includes:

[0216] The AIS acquisition unit is used to connect to the Automatic Identification System (AIS) to acquire ship location information and ship track information.

[0217] The terminal acquisition unit, connected to the AIS acquisition unit, is used to acquire all terminals on the ship that have network communication needs within the preset service range based on the ship's location.

[0218] The terminal information acquisition unit, connected to the terminal acquisition unit, is used to acquire the first location information, first service type, and first trajectory information of each first terminal among all terminals.

[0219] In one embodiment, wherein:

[0220] The first location information is obtained by combining the ship's location information with the terminal's Global Navigation Satellite System (GNSS) positioning or network-side time advance (TA) estimation.

[0221] The first business type includes at least one of the following: eMBB high-definition video service, mMTCL sensor data service, and URLLC remote control service;

[0222] The first track information includes a first speed v and a first heading θ obtained from the ship's track information, wherein the first heading θ is the angle between the direction of the first speed v and at least one base station accessed by the first terminal.

[0223] In one embodiment, the access module 2 specifically includes:

[0224] The base station frequency band acquisition unit is used to acquire, based on the first location information, several frequency bands of several base stations whose service range covers the first terminal;

[0225] The frequency band preference list unit, connected to the base station frequency band unit, is used to obtain the first frequency band preference list of each frequency band combination of each base station that meets the service quality requirements of the first service type under the current network load.

[0226] A sending guidance access unit, connected to a frequency band preference list unit, is used to send a first frequency band preference list to a first terminal to guide the first terminal to access at least one frequency band of at least one base station according to the first frequency band preference list.

[0227] In one embodiment, wherein:

[0228] Several frequency bands include at least one of the following: the ultra-long-range coverage layer 900MHz band, the mid-range capacity layer 2.1GHz band, and the near-shore hotspot layer 3.5GHz band. The 900MHz band is achieved by using a lens antenna and 4T4R receiver diversity on the base station. The 2.1GHz band is achieved by superimposing an NR 2.1GHz radio frequency module and antenna system on the 4G base station. The 3.5GHz band is achieved by using a high-gain directional antenna on the base station.

[0229] The first frequency band preference list includes at least one of the following: a 3.5 GHz band that meets eMBB high-definition video service requirements, or a combination of a 2.1 GHz band and a 900 MHz band that meets eMBB high-definition video service requirements, a 900 MHz band that meets mMTCL sensor data requirements, and a 2.1 GHz band that meets URLLC remote control requirements, and their priority order.

[0230] In one embodiment, the apparatus further includes a component connected to the transmission guidance access unit:

[0231] The DSS unit is used to dynamically allocate resources for the services of the first terminal at the subframe level if the first terminal accesses the 900MHz frequency band. The resources are either 5G New Radio (NR) resources or 4G Long Term Evolution (LTE) resources.

[0232] The CA unit is used to enable cross-band carrier aggregation (CA) to activate dual connectivity for the first terminal in the 900MHz primary cell PCell and the 2.1GHz secondary cell SCell if the first terminal accesses the combination of the 2.1GHz frequency band and the 900MHz frequency band.

[0233] In one embodiment, the prediction adjustment module 3 specifically includes:

[0234] The position prediction unit is used to predict the second position information of the first terminal t seconds later, based on the first terminal's current first position information (x0, y0) and first track information (v, θ). );

[0235] A window expansion unit, connected to a location prediction unit, is used to dynamically expand the center of the first uplink timing window for receiving the signal from the first terminal after at least one frequency band of at least one base station to τ=2d / c. The width of the first uplink timing window is proportional to v.

[0236] Where v is the current first speed of the first terminal, θ is the angle between the direction of v and at least one base station accessed by the first terminal, and θ is the distance between the first terminal and at least one base station accessed. c is the speed of light.

[0237] In one embodiment, wherein:

[0238] The first terminal is located on the navigation vehicle, and the first track information is obtained based on the track information of the navigation vehicle, without relying on communication with the first terminal;

[0239] The signal of the first terminal adopts the Physical Random Access Channel (PRACH) long sequence format, which supports a maximum round-trip propagation delay corresponding to a coverage radius of 100km.

[0240] Example 3:

[0241] like Figure 7 As shown, Embodiment 3 of this application provides a computer-readable storage medium storing a computer program. When the computer program is run by a processor, it implements the communication dynamic scheduling method as described in Embodiment 1.

[0242] The computer-readable storage medium includes volatile or non-volatile, removable or non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, computer program units, or other data). Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash memory or other memory technologies, CD-ROM (Compact Disc Read-Only Memory), DVD or other optical disc storage, cartridges, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer.

[0243] like Figure 8 As shown, this application can also provide a computer device, including a memory and a processor. The memory stores a computer program, and when the processor runs the computer program stored in the memory, the processor executes the communication dynamic scheduling method as described in Embodiment 1. This computer device can be the communication dynamic scheduling device as described in Embodiment 2.

[0244] The memory is connected to the processor. The memory can be flash memory, read-only memory or other types of memory. The processor can be a central processing unit or a microcontroller.

[0245] Embodiments 1-3 of this application provide a communication dynamic scheduling method, device, and medium. Through a location + service dual-driven active scheduling strategy, the terminal is guided to access the optimal frequency band cell, and the uplink timing window for the base station to receive terminal signals is predictively adjusted based on flight track information. This avoids synchronization failure problems caused by fixed TA for high-speed navigation terminals and improves the terminal communication effect in high-speed mobile scenarios.

[0246] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this application, and this application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this application, and these modifications and improvements are also considered to be within the scope of protection of this application.

Claims

1. A communication dynamic scheduling method, characterized in that, The method includes: Obtain the first location information, first service type, and first flight path information of the first terminal; Based on the first location information and the first service type, guide the first terminal to access at least one frequency band of at least one base station; Based on the first location information and the first trajectory information, predict and adjust the first uplink timing window for receiving signals from the first terminal in at least one frequency band of at least one base station.

2. The method according to claim 1, characterized in that, Obtaining the first location information, first service type, and first trajectory information of the first terminal, specifically including: Connect to the Automatic Identification System (AIS) to obtain vessel location and track information; Based on the ship's location, obtain all terminals on ships that have network communication needs that fall within the preset service range; Obtain the first location information, first service type, and first trajectory information of each first terminal among all terminals.

3. The method according to claim 2, characterized in that, in: The first location information is obtained by combining the ship's location information with the terminal's Global Navigation Satellite System (GNSS) positioning or network-side time advance (TA) estimation. The first business type includes at least one of the following: eMBB high-definition video service, mMTCL sensor data service, and URLLC remote control service; The first track information includes a first speed v and a first heading θ obtained from the ship's track information, wherein the first heading θ is the angle between the direction of the first speed v and at least one base station accessed by the first terminal.

4. The method according to claim 3, characterized in that, Based on the first location information and the first service type, guide the first terminal to access at least one frequency band of at least one base station, specifically including: Based on the first location information, obtain several frequency bands of several base stations covering the first terminal; Obtain the first frequency band preference list for each frequency band combination of each base station that meets the service quality requirements of the first service type under the current network load; The first frequency band preference list is sent to the first terminal to guide the first terminal to access at least one frequency band of at least one base station according to the first frequency band preference list.

5. The method according to claim 4, characterized in that, in: Several frequency bands include at least one of the following: the ultra-long-range coverage layer 900MHz band, the mid-range capacity layer 2.1GHz band, and the near-shore hotspot layer 3.5GHz band. The 900MHz band is achieved by using a lens antenna and 4T4R receiver diversity on the base station. The 2.1GHz band is achieved by superimposing an NR 2.1GHz radio frequency module and antenna system on the 4G base station. The 3.5GHz band is achieved by using a high-gain directional antenna on the base station. The first frequency band preference list includes at least one of the following: a 3.5 GHz band that meets eMBB high-definition video service requirements, or a combination of a 2.1 GHz band and a 900 MHz band that meets eMBB high-definition video service requirements, a 900 MHz band that meets mMTCL sensor data requirements, and a 2.1 GHz band that meets URLLC remote control requirements, and their priority order.

6. The method according to claim 5, characterized in that, After the first terminal accesses at least one frequency band of at least one base station according to the first frequency band preference list, the method further includes: If the first terminal accesses the 900MHz frequency band, the Dynamic Spectrum Sharing (DSS) application will dynamically allocate resources for the first terminal's services at the subframe level. The resources will be either 5G New Radio (NR) resources or 4G Long Term Evolution (LTE) resources. If the first terminal accesses the combination of the 2.1GHz and 900MHz frequency bands, cross-band carrier aggregation (CA) is enabled to activate dual connectivity for the first terminal in the 900MHz primary cell PCell and the 2.1GHz secondary cell SCell.

7. The method according to any one of claims 1-6, characterized in that, Based on the first location information and the first trajectory information, a first uplink timing window for predicting and adjusting the reception of the first terminal's signal in at least one frequency band of at least one base station is calculated, specifically including: Based on the current first location information (x0, y0) and first track information (v, θ) of the first terminal, predict the second location information of the first terminal t seconds later. ); The center of the first uplink timing window for receiving the signal from the first terminal after dynamically extending at least one frequency band of at least one base station to τ=2d / c, and the width of the first uplink timing window is proportional to v; Where v is the current first speed of the first terminal, θ is the angle between the direction of v and at least one base station accessed by the first terminal, and θ is the distance between the first terminal and at least one base station accessed. c is the speed of light.

8. The method according to claim 7, characterized in that, in: The first terminal is located on the navigation vehicle, and the first track information is obtained based on the track information of the navigation vehicle, without relying on communication with the first terminal; The signal of the first terminal adopts the Physical Random Access Channel (PRACH) long sequence format, which supports a maximum round-trip propagation delay corresponding to a coverage radius of 100km.

9. A communication dynamic scheduling device, characterized in that, The device includes: The acquisition module is used to acquire the first location information, the first service type, and the first flight path information of the first terminal; A guidance access module, connected to an acquisition module, is used to guide a first terminal to access at least one frequency band of at least one base station based on first location information and a first service type; The prediction and adjustment module, connected to the guidance and access module, is used to predict and adjust the first uplink timing window for receiving signals from the first terminal in at least one frequency band of at least one base station based on the first location information and the first track information.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the communication dynamic scheduling method as described in any one of claims 1-8.

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