Cell handover method, electronic device, base station, and communication system

Abstract

The present application relates to the field of radio frequencies, and discloses a cell handover method, an electronic device, a base station, and a communication system, for use in preventing an electronic device from handing over to a non-private network cell. The cell handover method comprises: measuring a movement speed level and a movement direction of an electronic device; receiving, from a base station, the orientation of a neighboring cell relative to the electronic device; or, receiving, from the base station, the position of a serving cell and the position of the neighboring cell; measuring the signal quality of the serving cell and the signal quality of the neighboring cell; adjusting the signal quality of the neighboring cell on the basis of the movement speed level of the electronic device and the orientation of the neighboring cell relative to the movement direction; in response to the signal quality of the serving cell and the adjusted signal quality of the neighboring cell satisfying a reselection condition, reselecting the neighboring cell; or sending the signal quality of the serving cell and the adjusted signal quality of the neighboring cell to the base station; receiving a handover command from the base station, the handover command being used for instructing the electronic device to hand over to the neighboring cell; and in response to the handover command, handing over to the neighboring cell.

Description

Cell handover methods, electronic equipment, base stations and communication systems

[0001] This application claims priority to Chinese Patent Application No. 202411897074.X, filed with the State Intellectual Property Office of China on December 23, 2024, entitled "Cell Handover Method, Electronic Device, Base Station and Communication System", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of radio frequency, and more particularly to a cell handover method, electronic equipment, base station, and communication system. Background Technology

[0003] Along high-speed rail (HST) lines, there are dedicated network cells (e.g., HST cells) and non-dedicated network cells (e.g., non-HST cells). Compared to non-dedicated network cells, high-speed moving electronic devices have a higher success rate of access and a lower dropout rate in dedicated network cells.

[0004] As mobile phones and other electronic devices move at high speeds with the train, they frequently switch between cell networks. Sometimes, after switching to a non-private network cell, the electronic device cannot switch back to a private network cell, resulting in a lower cell handover success rate, a higher drop rate, and situations such as call interruption, video lag, or game disconnection. Summary of the Invention

[0005] This application provides a cell handover method, electronic device, base station, and communication system to avoid electronic devices handing over to non-private network cells.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, a cell handover method is provided, applied to an electronic device. The method includes: measuring the moving speed level and moving direction of the electronic device; receiving the orientation of a neighboring cell relative to the electronic device from a base station; or, receiving the location of a serving cell and the location of a neighboring cell from the base station; using the location of the serving cell and the location of the neighboring cell to obtain the orientation of the neighboring cell relative to the electronic device, and using the orientation of the neighboring cell relative to the electronic device to obtain the orientation of the neighboring cell relative to the moving direction; measuring the signal quality of the serving cell and the signal quality of the neighboring cell; adjusting the signal quality of the neighboring cell according to the moving speed level of the electronic device and the orientation of the neighboring cell relative to the moving direction; performing a reselection to the neighboring cell in response to the signal quality of the serving cell and the adjusted signal quality of the neighboring cell satisfying a reselection condition; or, sending the signal quality of the serving cell and the adjusted signal quality of the neighboring cell to the base station; receiving a handover command from the base station, the handover command instructing the electronic device to handover to the neighboring cell, the handover command being triggered by the signal quality of the serving cell and the adjusted signal quality of the neighboring cell satisfying a handover condition; and performing a handover to the neighboring cell in response to the handover command.

[0008] The cell handover method provided in this application involves an electronic device adjusting the signal quality of a neighboring cell based on its own speed and the relative position of the neighboring cell to the direction of movement. If the signal quality of the serving cell and the adjusted signal quality of the neighboring cell meet the reselection criteria, the electronic device will reselect to the neighboring cell. If the signal quality of the serving cell and the adjusted signal quality of the neighboring cell meet the handover criteria, the base station will instruct the electronic device to hand over to the neighboring cell. In high-speed rail scenarios, due to the high speed and small curvature of the high-speed rail lines, dedicated network cells, such as high-speed rail cells, are typically located along the high-speed rail lines, while non-dedicated network cells are usually not. Therefore, dedicated network cells are typically located directly in front of (or in front of) and directly behind (or behind) the direction of movement of the electronic device on the train, while other non-dedicated network cells are typically located diagonally in front of, diagonally behind, or vertically to the direction of movement of the electronic device on the train. Furthermore, the speed of electronic devices on trains is relatively high, while the speed of electronic devices on the ground is relatively low. Therefore, the speed level of the moving electronic equipment can be used to screen out the electronic equipment in the train. The position of the neighboring cell relative to the moving direction of the electronic equipment can be used to distinguish whether the neighboring cell is a private network cell or a non-private network cell. Then, the signal quality of the neighboring cell can be adjusted accordingly, making it easier for these electronic equipment to switch or reselect to a private network cell, and avoiding these electronic equipment to switch or reselect to a non-private network cell.

[0009] In one possible implementation, the method further includes receiving adjustment parameters from the base station. These adjustment parameters indicate adjustment values ​​for the signal quality of neighboring cells at each mobile speed level and at each azimuth relative to the direction of movement. This implementation is optional. The electronic device can pre-configure the adjustment parameters, eliminating the need for the base station to send them to the electronic device, thus saving air interface overhead. Alternatively, the base station can send adjustment parameters to the electronic device to override pre-configured parameters, allowing the electronic device to flexibly adjust according to the latest network configuration. If the electronic device has not pre-configured adjustment parameters, the base station can send them to the electronic device, which can also flexibly adjust according to the latest network configuration.

[0010] In one possible implementation, the signal quality of neighboring cells is adjusted based on the moving speed level of the electronic device and the orientation of the neighboring cells relative to the moving direction. This includes: pre-enhancing the signal quality of neighboring cells in front of the electronic device in the moving direction, and / or pre-weakening the signal quality of neighboring cells behind the electronic device in the moving direction. This is to ensure that the electronic device switches to the preceding private network cell as early as possible when approaching it, avoiding switching to the following neighboring cells. Furthermore, at the same orientation, the higher the moving speed level of the electronic device, the more drastic the change in the signal quality of the neighboring cells. Therefore, the larger the absolute value of the adjustment parameter, the greater the adjustment range. In other words, the higher the moving speed of the electronic device, the greater the pre-enhancing of the signal quality of neighboring cells in front of the electronic device (e.g., directly in front, diagonally in front), and the greater the pre-weakening of the signal quality of neighboring cells behind the electronic device (e.g., directly behind, diagonally behind).

[0011] Secondly, a cell handover method is provided, applied to a base station. The method includes: receiving the moving speed level and moving direction of an electronic device from the electronic device; receiving the signal quality of the serving cell and the signal quality of neighboring cells from the electronic device; adjusting the signal quality of the neighboring cells according to the moving speed level of the electronic device and the orientation of the neighboring cells relative to the moving direction; and sending a handover command to the electronic device in response to the signal quality of the serving cell and the adjusted signal quality of the neighboring cells meeting the handover conditions. The handover command is used to instruct the electronic device to hand over to the neighboring cell.

[0012] The cell handover method provided in this application involves a base station adjusting the signal quality of neighboring cells based on the moving speed level of the electronic device and the orientation of neighboring cells relative to the moving direction of the electronic device. If the signal quality of the serving cell and the adjusted signal quality of the neighboring cells meet the handover conditions, the base station instructs the electronic device to hand over to the neighboring cell. In high-speed rail scenarios, due to the high speed of high-speed trains and the small curvature of the high-speed rail lines, dedicated network cells such as high-speed rail cells are typically located along the high-speed rail lines, while non-dedicated network cells are usually not located along the high-speed rail lines. Therefore, dedicated network cells are usually located directly in front of (or in front of) and directly behind (or behind) the moving direction of the electronic device in the train, while other non-dedicated network cells are usually located diagonally in front of, diagonally behind, or vertically in other orientations. In addition, the moving speed level of electronic devices in trains is high, while the moving speed level of electronic devices on the ground is low. Therefore, the speed level of the moving electronic equipment can be used to screen out the electronic equipment in the train. The position of the neighboring cell relative to the moving direction of the electronic equipment can be used to distinguish whether the neighboring cell is a private network cell or a non-private network cell. Then, the signal quality of the neighboring cell can be adjusted accordingly to make it easier for these electronic equipment to switch to private network cells and avoid switching to non-private network cells.

[0013] In one possible implementation, the method further includes: sending the location of the neighboring cell relative to the electronic device, or sending the location of the serving cell and the location of the neighboring cell to the electronic device; the location of the serving cell and the location of the neighboring cell are used to obtain the location of the neighboring cell relative to the electronic device, and the location of the neighboring cell relative to the electronic device is used to obtain the location of the neighboring cell relative to the direction of movement. This information is ultimately used by the electronic device to obtain the location of the neighboring cell relative to the direction of movement of the electronic device.

[0014] In one possible implementation, the method further includes sending adjustment parameters to the electronic device. These adjustment parameters indicate adjustment values ​​for the signal quality of neighboring cells at each mobile speed level and at each azimuth relative to the mobile direction. This implementation is optional. The electronic device can be pre-configured with adjustment parameters, eliminating the need for the base station to send these parameters to the electronic device and saving air interface overhead. Alternatively, the base station can send adjustment parameters to the electronic device to override pre-configured parameters, allowing the electronic device to flexibly adjust according to the latest network configuration. If the electronic device has not pre-configured adjustment parameters, the base station can send them to the electronic device, which can also flexibly adjust according to the latest network configuration.

[0015] In one possible implementation, the signal quality of neighboring cells is adjusted based on the moving speed level of the electronic device and the orientation of the neighboring cells relative to the moving direction. This includes: pre-enhancing the signal quality of neighboring cells in front of the electronic device in the moving direction, and / or pre-weakening the signal quality of neighboring cells behind the electronic device in the moving direction. This is to ensure that the electronic device switches to the preceding private network cell as early as possible when approaching it, avoiding switching to the following neighboring cells. Furthermore, at the same orientation, the higher the moving speed level of the electronic device, the more drastic the change in the signal quality of the neighboring cells. Therefore, the larger the absolute value of the adjustment parameter, the greater the adjustment range. In other words, the higher the moving speed of the electronic device, the greater the pre-enhancing of the signal quality of neighboring cells in front of the electronic device (e.g., directly in front, diagonally in front), and the greater the pre-weakening of the signal quality of neighboring cells behind the electronic device (e.g., directly behind, diagonally behind).

[0016] Thirdly, an electronic device is provided, including a processor and a memory, wherein instructions are stored in the memory, and when the processor executes the instructions, the electronic device performs the method as described in the first aspect and any embodiment thereof.

[0017] Fourthly, a base station is provided, including a processor and a memory, wherein instructions are stored in the memory, and when the processor executes the instructions, the base station performs the method as described in the second aspect and any embodiment thereof.

[0018] Fifthly, a communication device is provided, comprising a processing module and a transceiver module. The processing module is used to perform processing-related operations in the first aspect and any embodiment thereof, and the transceiver module is used to perform transmission-reception-related operations in the first aspect and any embodiment thereof.

[0019] In a sixth aspect, a communication device is provided, comprising a processing module and a transceiver module. The processing module is used to perform processing-related operations in the second aspect and any embodiment thereof, and the transceiver module is used to perform transmission-reception-related operations in the second aspect and any embodiment thereof.

[0020] A seventh aspect provides a communication system, including an electronic device as described in the third aspect and a base station as described in the fourth aspect, or including a communication device as described in the fifth aspect and a communication device as described in the sixth aspect.

[0021] Eighthly, a computer-readable storage medium is provided, including instructions that, when executed on an electronic device, cause the electronic device to perform the method as described in the first aspect and any embodiment thereof.

[0022] A ninth aspect provides a computer-readable storage medium including instructions that, when executed on a base station, cause the base station to perform the method as described in the second aspect and any embodiment thereof.

[0023] In a tenth aspect, a computer program product comprising instructions is provided, which, when executed on the electronic device, cause the electronic device to perform the method as described in the first aspect and any embodiment thereof.

[0024] In an eleventh aspect, a computer program product containing instructions is provided, which, when executed on the base station, cause the base station to perform the method as described in the second aspect and any embodiment thereof.

[0025] The technical effects of the third to eleventh aspects refer to the technical effects of the first or second aspects and any of their embodiments, and will not be repeated here. Attached Figure Description

[0026] Figure 1 is a schematic diagram of a high-speed rail scenario with a combination of private and non-private network cells provided in an embodiment of this application.

[0027] Figure 2 is a frequency band diagram of a private network cell in a high-speed rail scenario provided in an embodiment of this application;

[0028] Figure 3 is a schematic diagram of the architecture of a communication system provided in an embodiment of this application;

[0029] Figure 4 is a schematic diagram of the structure of an electronic device and a base station provided in an embodiment of this application;

[0030] Figure 5 is a schematic diagram of an electronic device camping on a non-private network cell due to a radio link failure (RLF) provided in an embodiment of this application.

[0031] Figure 6 is a schematic diagram of an electronic device staying in a non-private network cell due to better signal quality in an embodiment of this application.

[0032] Figure 7 is a flowchart illustrating a cell handover method provided in an embodiment of this application;

[0033] Figure 8 is a schematic diagram of the orientation of a neighboring cell relative to the moving direction of an electronic device according to an embodiment of this application;

[0034] Figure 9 is a schematic diagram of the orientation of another neighboring cell relative to the moving direction of the electronic device according to an embodiment of this application;

[0035] Figure 10 is a flowchart illustrating another cell handover method provided in an embodiment of this application;

[0036] Figure 11 is a flowchart illustrating another cell handover method provided in an embodiment of this application;

[0037] Figure 12 is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0038] Figure 13 is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0039] First, some concepts involved in this application will be described.

[0040] The terms "first" and "second" used in the embodiments of this application are only used to distinguish features of the same type and should not be construed as indicating relative importance, quantity, order, etc.

[0041] The terms "exemplary" or "for example" used in the embodiments of this application are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0042] The terms "coupling" and "connection" used in the embodiments of this application should be interpreted broadly. For example, they can refer to a physical direct connection or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0043] As shown in Figure 1, in high-speed rail scenarios, dedicated network cells (e.g., high-speed rail cells) and non-dedicated network cells (e.g., non-high-speed rail cells) are often interspersed, especially in the platform area, where non-dedicated network cells are more densely packed than dedicated network cells. As shown in Figure 2, dedicated network cells can include multiple frequency bands, such as FDD 1800, TDD 1900, TDD 2500, and NR 2600. Higher frequency bands result in more significant signal attenuation with propagation distance, smaller coverage areas, and more frequent inter-cell handovers. Electronic devices moving at high speeds with high-speed rail frequently switch between different cells. If an electronic device switches from a dedicated network cell to a non-dedicated network cell but fails to switch back to a dedicated network cell in a timely manner, it may become stuck in the non-dedicated network cell. If the electronic device is engaged in voice calls, video conferencing, or online gaming at this time, it may experience signal fluctuations, network outages, slow network speeds, call interruptions (dropped calls), video stuttering, or game disconnections.

[0044] Therefore, the cell handover method, electronic equipment, base station, and communication system provided in this application adjust the signal quality of neighboring cells based on the moving speed level of the electronic equipment and the orientation of neighboring cells relative to the moving direction of the electronic equipment. In the high-speed rail scenario, due to the high speed of high-speed trains and the small curvature of high-speed rail lines, dedicated network cells such as high-speed rail cells are usually set along the high-speed rail lines, while non-dedicated network cells are usually not set along the high-speed rail lines. Therefore, dedicated network cells are usually located directly in front of (or in front of) and directly behind (or behind) the moving direction of the electronic equipment in the train, while other non-dedicated network cells are usually located diagonally in front of, diagonally behind, or vertically in other orientations. In addition, the moving speed of electronic equipment in the train is relatively high, while the moving speed of electronic equipment on the ground is relatively low. Therefore, the speed level of the moving electronic equipment can be used to screen out the electronic equipment in the train. The position of the neighboring cell relative to the moving direction of the electronic equipment can be used to distinguish whether the neighboring cell is a private network cell or a non-private network cell. Then, the signal quality of the neighboring cell can be adjusted accordingly, making it easier for these electronic equipment to switch or reselect to a private network cell, and avoiding these electronic equipment to switch or reselect to a non-private network cell.

[0045] Figure 3 shows the architecture of the communication system provided in this embodiment of the application. The communication system includes: electronic device 100 and base station 200.

[0046] Electronic device 100 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem with wireless communication capabilities; it may also include mobile phones, tablets, laptops, personal computers (PCs), subscriber units, cellular phones, smartphones, wireless data cards, personal digital assistant (PDA) computers, tablet computers, wireless modems, handheld devices, laptop computers, cordless phones, wireless local loop (WLL) stations, machine type communication (MTC) terminals, user equipment (UE), mobile stations (MS), terminal devices, or relay user equipment, etc.

[0047] Base station 200 is a device that provides wireless access to electronic device 100, including but not limited to radio access network (RAN) equipment, gNodeB, etc. Base station 200 can also be a separate base station, including a remote radio unit (RRU) and a baseband unit (BBU).

[0048] Figure 4 shows a schematic diagram of the structure of the electronic device and base station provided in an embodiment of this application. The electronic device 100 includes at least one processor 101, at least one memory 102, and at least one transceiver 103.

[0049] Processor 101 may include one or more processing units, such as: field-programmable gate array (FPGA), application-specific integrated circuit (ASIC), system-on-chip (SoC), central processor (CPU), network processor (NP), microcontroller unit (MCU), programmable logic device (PLD), application processor (AP), modem processor, graphics processing unit (GPU), image signal processor (ISP), controller, video codec, digital signal processor (DSP), baseband processor, and / or neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0050] The memory 102 can be volatile memory or non-volatile memory, or it can include both. 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 dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0051] The memory 102 can exist independently and be connected to the processor 101 via a bus. Alternatively, the memory 102 can be integrated with the processor 101. The memory 102 stores the application code that executes the scheme of this application, and its execution is controlled by the processor 101. The processor 101 executes the computer program instructions stored in the memory 102, thereby performing various functional applications and data processing of the electronic device, such as implementing the cell handover method described in the embodiments of this application.

[0052] The processor 101 and transceiver 103 are connected via a bus. The transceiver 103 can be any transceiver-like device used for communication with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc. The transceiver 103 includes a transmitter Tx and a receiver Rx.

[0053] Base station 200 includes at least one processor 201, at least one memory 202, at least one transceiver 203, and at least one network interface 204. Network interface 204 is used to connect to the network interface of core network equipment via a link (e.g., an S1 interface), or to connect to the network interfaces of other base stations via a wired or wireless link (e.g., an X2 interface). Processor 201 is used to execute computer program instructions stored in memory 202, thereby performing various functional applications and data processing of the base station, such as implementing the cell handover method described in the embodiments of this application. The functions of each component within base station 200 are described with reference to the functional description of each component within electronic device 100, and will not be repeated here.

[0054] In Figure 3, the area covered by base station 200 is a cell, such as C1-C8 in Figure 3. Base station 200 is set up along the high-speed railway line, and the covered area can be divided into private network cells (e.g., high-speed railway cells) and non-private network cells (e.g., non-high-speed railway cells). Because the electronic equipment on the high-speed train moves very fast and exhibits significant Doppler shift, the physical random access channel (PRACH) in the private network cell uses a specially designed ZC sequence configured with highSpeedFlag to allow high-speed moving electronic equipment to access the private network cell. Furthermore, the tracking area update (TAU) is more fault-tolerant when electronic equipment switches between private network cells, and is less likely to be rejected by the network side.

[0055] High-speed rail cells can be networked using a high-speed train-single frequency network (HST-SFN), which means that the baseband unit (BBU) of the same base station connects multiple remote ends, i.e., by using multiple remote radio heads (RRHs). In this way, the cells of multiple base stations have the same cell identifier, which can reduce the number of handovers between electronic devices.

[0056] Because private and non-private network cells are often interspersed, high-speed mobile electronic devices frequently switch between different cells. If, as shown in Figure 5, the electronic device fails to switch from a non-private network cell to a private network cell in a timely manner, resulting in a radio link failure (RLF), or, as shown in Figure 6, the signal quality (e.g., reference signal receiving power (RSRP)) of the non-private network cell is better, the electronic device may find it difficult to switch back to a private network cell after switching to a non-private network cell, potentially leading to the device remaining in the non-private network cell. If the electronic device is engaged in voice calls, video conferencing, or online gaming at this time, it may experience signal fluctuations, network outages, slow network speeds, call interruptions (dropped calls), video stuttering, or game disconnections.

[0057] For example, Figure 5 illustrates a correct handover path between private network cells and a comparison of incorrect handover paths caused by RLF (Real-Time Failure). Physical Cell Identifier (PCI) 487 and PCI 482 are private network cells, while PCI 466 is a non-private network cell. The correct handover path between private network cells is PCI 487 → PCI 482. However, in the incorrect handover path, at point A, the RSRP measured by the electronic device for PCI 487 (serving cell) is -80 dBm, for PCI 466 (neighboring cell) it is -92 dBm, and for PCI 482 (neighboring cell) it is -97 dBm. Because the triggering conditions for event A4 are not configured correctly, events A3 or A5 are not triggered to allow the electronic device to handover from PCI 487 to PCI 484, but event A4 is triggered, causing the electronic device to handover from PCI 487 to PCI 466, i.e., from a private network cell to a non-private network cell. At point B, the signal quality of PCI466 (serving cell) deteriorates, while the signal quality of PCI482 (neighboring cell) is better, triggering event A5. However, because the base station fails to send a handover command to the electronic device in a timely manner, an RLF occurs, and the electronic device cannot hand over to PCI482.

[0058] For example, Figure 6 illustrates how the signal quality of a non-private network cell is better than that of a private network cell, causing electronic devices to camp on the non-private network cell. PCI499 and PCI482 are private network cells, while PCI421 and PCI402 are non-private network cells. At point A, the RSRP measured by the electronic device for PCI499 (serving cell) is -85 dBm, for PCI421 (neighboring cell) it is -83 dBm, and for PCI482 (neighboring cell) it is -97 dBm. The communication quality of PCI421 (neighboring cell) is better than that of both PCI499 and PCI482, causing the electronic device to switch from PCI499 to PCI421, i.e., from a private network cell to a non-private network cell. At point B, the RSRP measured by the electronic device for PCI421 (serving cell) is -84dBm, for PCI482 (neighboring cell) it is -89dBm, and for PCI402 (neighboring cell) it is -82dBm. The communication quality of PCI402 (neighboring cell) is better than that of both PCI421 and PCI482. This causes the electronic device to switch from PCI421 to PCI402, meaning it switches from a non-private network cell to another non-private network cell, resulting in the electronic device remaining in the non-private network cell.

[0059] A3 event: An A3 event occurs when the difference between the signal quality of a neighboring cell (e.g., reference signal receiving power (RSRP)) and the signal quality of the serving cell exceeds a relative threshold. An A3 event can be expressed as: Mn + Ofn + Ocn - Hys > Ms + Ofs + Ocs + Off. Mn is the neighboring cell measurement result; Ofn is the specific frequency offset of the neighboring cell, determined by the parameter QoffsetFreq; Ocn is the specific cell offset of the neighboring cell, determined by the parameter CellindividualOffest; Hys is the A3 event hysteresis parameter, determined by IntraFrqHoA3Hyst; Ms is the serving cell measurement result; Ofs is the specific frequency offset of the serving cell, determined by the parameter QoffsetFreq; Ocs is the specific cell offset of the serving cell, determined by the parameter CellSpecificOffest; Off is the A3 event offset parameter, determined by the parameter IntraFrqHoA3Offset.

[0060] A4 event: An A4 event occurs when the signal quality of a neighboring cell exceeds an absolute threshold. An A4 event can be represented as: RSRP of the neighboring cell > absolute threshold.

[0061] An A5 event refers to a situation where the signal quality of the serving cell deteriorates while the signal quality of neighboring cells remains relatively good. Specifically, an A5 event occurs when the signal quality of the serving cell is below absolute threshold 1, and the signal quality of neighboring cells is above absolute threshold 2.

[0062] Events A3, A4, and A5 can all trigger the base station to send a handover command to the electronic device, which instructs the electronic device to hand over to a neighboring cell.

[0063] In existing technologies, the network side configures fixed handover paths, enabling electronic devices to prioritize handover within dedicated network cells. For example, as shown in Figure 3, the network side can configure a fixed handover path as C1→C2→C3→C4. Electronic devices prioritize searching for cells within the handover path and perform handover in advance, achieving unidirectional handover between dedicated network cells and avoiding ping-pong handovers. However, this method also has drawbacks. First, obtaining the handover path is costly, requiring on-site measurement. Second, if network adjustments occur, the handover path may become invalid if it is not updated promptly.

[0064] As shown in Figure 7, this application embodiment provides a cell handover method, which includes steps S101-S108. In this embodiment, the base station adjusts the signal quality of neighboring cells based on the moving speed level of the electronic device and the orientation of neighboring cells relative to the moving direction of the electronic device.

[0065] S101, The base station sends mobility status parameters to the electronic device.

[0066] The base station sends a system information block (SIB) message to the electronic device. The SIB message includes Mobility State Parameters, which are used to estimate the mobility speed level of the electronic device during cell handover. The electronic device determines its mobility speed level based on the number of cell handovers within a given time period and reports this to the base station when entering the connected state, so that the base station can perform further processing. Correspondingly, the electronic device receives the Mobility State Parameters from the base station.

[0067] Additionally, the SIB message may include highSpeedConfig. highSpeedConfig indicates that the electronic device needs to support the ability to access the HSN. For example, the electronic device may support HST measurement enhancement, HST SFN demodulation enhancement, intraNR measurement enhancement, interRAT measurement enhancement, etc., primarily to shorten the measurement time of the electronic device.

[0068] S102. Electronic equipment: Measuring the speed level and direction of movement of electronic equipment.

[0069] Electronic devices can determine their movement speed level by comparing the number of cell handovers within a preset time period with a threshold in the mobility status parameters. Since the number of cell handovers within the preset time period is relatively small, this movement speed level is used to roughly estimate the movement speed of the electronic devices. For example, the movement speed level of electronic devices can be divided into three levels: low speed, medium speed, and high speed. In a high-speed rail scenario, because the movement speed of electronic devices on the train is high while that of electronic devices on the ground is low, medium-speed and high-speed electronic devices are given priority access to dedicated network cells, which provide services to these devices, resulting in a higher cell handover success rate and a lower dropout rate. Low-speed electronic devices avoid accessing dedicated network cells to prevent congestion.

[0070] Electronic devices can measure their direction of movement using orientation sensors (such as gyroscopes, magnetometers, etc.). The direction of movement can be ambiguous, such as due south, due north, due east, due west, southeast, northeast, southwest, or north. Alternatively, it can be precise, such as a counter-clockwise or clockwise angle relative to due north.

[0071] S103. The electronic device sends its moving speed level and moving direction to the base station.

[0072] In one possible implementation, the electronic device can send user equipment (UE) assistance information (UAI) to the base station, which includes the electronic device's speed level and direction of movement.

[0073] In another possible implementation, the electronic device can send a measurement report to the base station, which includes the electronic device's speed level and direction of movement.

[0074] Accordingly, the base station receives the moving speed level and moving direction of the electronic device from the electronic device.

[0075] S104. Electronic equipment measures the signal quality of the serving cell and the signal quality of neighboring cells of the electronic equipment.

[0076] The signal quality of the serving cell and the signal quality of the neighboring cells of the electronic device can be RSRP, RSRQ, SNR, etc. For example, the embodiments of this application use RSRP as an example for illustration, but are not limited thereto.

[0077] S105. The electronic device sends the measured signal quality of the serving cell and the measured signal quality of the neighboring cells to the base station.

[0078] Electronic devices can send measurement reports to the base station. These reports include measurements of the signal quality of the serving cell and the signal quality of neighboring cells. The cells (serving cell and neighboring cells) in the measurement report are distinguished by PCI (Presentation Processing Index).

[0079] Accordingly, the base station receives the signal quality of the serving cell and the signal quality of neighboring cells from the electronic equipment.

[0080] It should be noted that S102 and S103 can be executed first, followed by S104 and S105. Alternatively, S104 and S105 can be executed first, followed by S102 and S103. Or, S102 and S104 can be executed first, followed by S103 and S105. The key is that S102 must precede S103, and S104 must precede S105.

[0081] S106. The base station adjusts the signal quality of neighboring cells based on the moving speed level of the electronic equipment and the orientation of the neighboring cells relative to the moving direction of the electronic equipment.

[0082] First, the base station determines the location of the neighboring cell relative to the electronic device based on the location of the serving cell and the location of the neighboring cells.

[0083] The location of the serving cell is the location (latitude and longitude) of this base station, and the location of neighboring cells is the location (latitude and longitude) of base stations adjacent to this base station. This information is configured to each base station during network setup. Because the measurement reports sent by electronic devices include the PCI of the serving cell and the PCI of neighboring cells, the base station can query the location of the serving cell using the PCI of the serving cell, and the location of the neighboring cells using the PCI of the neighboring cells. Based on the location of the serving cell and the location of the neighboring cells, the base station can obtain the orientation of the neighboring cells relative to the electronic device using triangulation. For example, as shown in Figure 3, electronic device 100 is at point C, the serving cell is C2, and the neighboring cells are C3, C6, and C7. Base station 200 can obtain the orientation of neighboring cells C3, C6, and C7 relative to electronic device 100 using triangulation based on the location of the serving cell C2 and the locations of neighboring cells C3, C6, and C7.

[0084] Secondly, the base station obtains the orientation of the neighboring cell relative to the moving direction of the electronic device based on the moving direction of the electronic device and the orientation of the neighboring cell relative to the electronic device.

[0085] As shown in Figure 3, due to the high speed of high-speed trains and the small curvature of the high-speed rail lines, dedicated network cells such as high-speed rail cells are usually located along the high-speed rail lines, while non-dedicated network cells are usually not located along the high-speed rail lines. Therefore, dedicated network cells are usually located directly in front of (or in front of) and directly behind (or behind) the electronic equipment 100 in the direction of movement of the train, while other non-dedicated network cells are usually located diagonally in front of, diagonally behind, or perpendicular to the direction of movement of the electronic equipment 100 in the train. Taking the direction of movement of the electronic equipment 100 as 0 degrees, the orientation of the neighboring cell relative to the electronic equipment 100 can be converted into the orientation of the neighboring cell relative to the direction of movement of the electronic equipment 100.

[0086] In one possible implementation, as shown in the adjustment parameter table in Table 1, the orientation of the neighboring area relative to the movement direction of the electronic device can include directly in front, diagonally in front, vertically, diagonally behind, and directly behind. For example, as shown in Figure 8, taking the movement direction of the electronic device as 0 degrees, the 360-degree orientation can be divided into eight equal parts of 45 degrees each. In clockwise order, the range for directly in front is 337.5 degrees to 22.5 degrees; the range for diagonally in front is 22.5 degrees to 67.5 degrees and 292.5 degrees to 337.5 degrees; the range for vertical is 67.5 degrees to 112.5 degrees and 247.5 degrees to 292.5 degrees; the range for diagonally behind is 112.5 degrees to 157.5 degrees and 202.5 degrees to 247.5 degrees; and the range for directly behind is 157.5 degrees to 202.5 degrees. Alternatively, the 360-degree orientation can be divided into eight parts unequally; this embodiment does not limit the scope of the invention.

[0087] Table 1 (Adjustment Parameter Table, Unit: dB)

[0088] In another possible implementation, as shown in the adjustment parameter table in Table 2, the orientation of the neighboring cell relative to the movement direction of the electronic device can include forward, vertical, and rear. For example, as shown in Figure 9, taking the movement direction of the electronic device as 0 degrees, the 360-degree direction can be divided into four equal parts of 90 degrees each. In clockwise order, the forward range is 315 degrees to 45 degrees, the vertical range is 45 degrees to 135 degrees and 225 degrees to 315 degrees, and the rear range is 135 degrees to 225 degrees. Alternatively, the 360-degree direction can be divided into four unequal parts; this embodiment does not limit the scope of the implementation.

[0089] Table 2 (Adjustment Parameter Table, Unit: dB)

[0090] Furthermore, the base station adjusts the signal quality of neighboring cells based on the moving speed level of the electronic devices and the orientation of neighboring cells relative to the moving direction of the electronic devices.

[0091] As shown in Tables 1 and 2, adjusting the signal quality of neighboring cells may include: pre-enhancing the signal quality of neighboring cells in front of the electronic device's direction of movement (e.g., directly in front, diagonally in front), and / or pre-attenuating the signal quality of neighboring cells behind the electronic device's direction of movement (e.g., directly behind, diagonally behind). Alternatively, adjusting the signal quality of neighboring cells may include: pre-enhancing the signal quality of neighboring cells close to the electronic device, and / or pre-attenuating the signal quality of neighboring cells far from the electronic device.

[0092] Relative to the direction of movement of the electronic device, if a neighboring cell is located in front of the electronic device, it is considered an approaching cell, and its signal quality will improve over time. Therefore, it is pre-enhanced to facilitate a switch to a forward neighboring cell as early as possible. If a neighboring cell is located behind the electronic device, it is considered a distant cell, and its signal quality will deteriorate over time. Therefore, it is pre-weakened to prevent the electronic device from switching to a backward neighboring cell, thus avoiding ping-pong handovers between cells. If a neighboring cell is located perpendicular to the direction of movement of the electronic device, its signal quality will remain unchanged over time, so no adjustment is made.

[0093] As shown in Tables 1 and 2, the adjustment parameters indicate the signal quality adjustment values ​​for each moving speed level of the electronic device and each azimuth of the neighboring cell relative to the moving direction of the electronic device. The base station can look up the adjustment parameters in the tables based on the moving speed level of the electronic device and the azimuth of the neighboring cell relative to the moving direction of the electronic device. These adjustment parameters are used to adjust the A3 event hysteresis parameter Hys in the A3 event. That is, Hys is increased by this adjustment parameter (dB) so that the electronic device can be triggered to perform inter-cell handover through the A3 event, thereby switching to the private network cell in advance. As mentioned earlier, the A3 event can be represented as: Mn + Ofn + Ocn - Hys > Ms + Ofs + Ocs + Off, where Mn is the neighboring cell measurement result and Ms is the serving cell measurement result. Taking Table 1 as an example, the adjustment parameter corresponding to high speed and direct front is -5. Therefore, the part to the left of event A3 ">" is Mn+Ofn+Ocn-(Hys-5)=Mn+Ofn+Ocn-Hys+5, which is equivalent to increasing the neighboring cell measurement result Mn by 5dB, i.e., pre-enhancing the signal quality of neighboring cells close to the electronic device. Again, taking Table 1 as an example, the adjustment parameter corresponding to high speed and direct rear is 5. The part to the left of event A3 ">" is Mn+Ofn+Ocn-(Hys+5)=Mn+Ofn+Ocn-Hys-5, which is equivalent to decreasing the neighboring cell measurement result Mn by 5dB, i.e., pre-weakening the signal quality of neighboring cells far from the electronic device.

[0094] It should be noted that, at the same azimuth, the higher the moving speed of the electronic device, the more drastic the change in signal quality in neighboring areas. Therefore, the larger the absolute value of the adjustment parameter, the greater the adjustment range. In other words, the higher the moving speed of the electronic device, the greater the pre-improvement of signal quality in neighboring areas directly in front of the device (e.g., directly in front, diagonally in front), and the greater the pre-improvement of signal quality in neighboring areas behind the device (e.g., directly behind, diagonally behind). For example, in Tables 1 and 2, in columns other than vertical orientation, the absolute value of the adjustment parameter corresponding to high speed is greater than the absolute value of the adjustment parameter corresponding to medium speed.

[0095] Furthermore, as shown in Figure 3, dedicated network cells are typically located along high-speed rail lines, while non-dedicated network cells are usually not. Therefore, dedicated network cells are typically located directly in front of (or ahead of) and directly behind (or behind) the direction of movement of the electronic equipment 100 in the train, while other non-dedicated network cells are typically located diagonally in front of, diagonally behind, or perpendicular to the direction of movement of the electronic equipment 100. Thus, as shown in Table 1, at the same speed level, the absolute value of the adjustment parameter (signal quality improvement) directly in front is greater than the absolute value of the adjustment parameter (signal quality improvement) diagonally in front, so that the electronic equipment 100 can switch to the dedicated network cell in front as early as possible when approaching it. The absolute value of the adjustment parameter (signal quality attenuation) diagonally behind is greater than the absolute value of the adjustment parameter (signal quality attenuation) directly behind, so that the electronic equipment 100 can avoid switching to non-dedicated network cells diagonally behind as much as possible when moving away from the dedicated network cell behind.

[0096] For example, as shown in Figure 3, assuming electronic device 100 is at point C, the serving cell is C2, and neighboring cells are C3, C6, and C7, neighboring cell C3 is directly in front of electronic device 100 in its direction of movement, so its signal quality can be increased by 5dB. Neighboring cell C6 is diagonally behind electronic device 100 in its direction of movement, so its signal quality can be decreased by 6dB. Neighboring cell C7 is perpendicular to the direction of movement of electronic device 100 and does not need adjustment. Assuming that electronic device 100 sends the RSRP of neighboring cell C3 to the base station as -102dBm, the RSRP of neighboring cell C6 as -99dBm, and the RSRP of neighboring cell C7 as -100dBm, then after the base station adjusts the signal quality of these neighboring cells, the resulting RSRP of neighboring cell C3 is -102dBm, the RSRP of neighboring cell C6 is -105dBm, and the RSRP of neighboring cell C7 is -100dBm.

[0097] S107. In response to the fact that the signal quality of the serving cell and the adjusted signal quality of the neighboring cells meet the handover conditions, the base station sends a handover command to the electronic equipment.

[0098] If an electronic device is in the CONNECTED state, the base station sends a handover command to the device, instructing it to hand over to a neighboring cell. After registering and joining the network, the electronic device is in the CONNECTED state, during which it can send and receive data. If there is no data interaction for a period of time, it enters the IDLE state. The electronic device can also send and receive data in the IDLE state, but it will reduce the frequency of switching its transceiver on and off, thereby reducing power consumption. If it receives data, it will enter the CONNECTED state. The handover command can be carried in the RRC reconfiguration message sent by the base station to the electronic device.

[0099] The handover condition can be met by satisfying the A3 event, which means that the difference between the signal quality of the adjusted neighboring cell and the signal quality of the serving cell is greater than a relative threshold. After the signal quality of the neighboring cells in front of the electronic device in the direction of movement is pre-enhanced, and / or the signal quality of the neighboring cells behind the electronic device in the direction of movement is pre-enhanced, the signal quality of the neighboring cells close to the electronic device is more likely to meet the handover condition, while the signal quality of the neighboring cells far away from the electronic device is less likely to meet the handover condition, making it easier for the electronic device to hand over to the neighboring cells in front of the electronic device in the direction of movement.

[0100] S108. In response to the handover command, the electronic device hands over to a neighboring cell.

[0101] For example, as shown in Figure 3, electronic device 100 moves from right to left along a high-speed railway. When electronic device 100 is at point A, the serving cell is C1, and the neighboring cell is C2. Neighboring cell C2 is located directly in front of electronic device 100 in the direction of movement. The signal quality of neighboring cell C2 can be increased by 5dB so that electronic device 100 can switch to the private network cell (neighboring cell C2) ahead of it as early as possible. After the switch, the serving cell becomes C2, and the neighboring cell becomes C1. Neighboring cell C1 is located directly behind electronic device 100 in the direction of movement. The signal quality of neighboring cell C1 can be reduced by 5dB. Even if neighboring cell C1 is also a private network cell, it is necessary to avoid ping-pong switching from serving cell C2 back to neighboring cell C1.

[0102] When electronic device 100 is at point B, the serving cell is C2 and the neighboring cell is C5. The neighboring cell C5 is located diagonally behind the moving direction of electronic device 100. The signal quality of the neighboring cell C5 can be reduced by 6dB to avoid electronic device 100 switching to the non-private network cell (neighboring cell C5) diagonally behind it.

[0103] When electronic device 100 is at point C, the serving cell is C2, and the neighboring cells are C3, C6, and C7. Neighboring cell C3 is directly in front of electronic device 100 in its direction of movement. The signal quality of neighboring cell C3 can be increased by 5dB to allow electronic device 100 to hand over to the dedicated network cell (neighboring cell C3) ahead of it as early as possible. Neighboring cell C6 is diagonally behind electronic device 100 in its direction of movement. The signal quality of neighboring cell C6 can be reduced by 6dB to prevent electronic device 100 from handing over to a non-dedicated network cell (neighboring cell C6) diagonally behind it. Neighboring cell C7 is perpendicular to the direction of movement of electronic device 100, and its signal quality is not adjusted. After the handover, the serving cell becomes C3, and the neighboring cells become C2, C6, and C7. Neighboring cell C2 is directly behind electronic device 100 in its direction of movement. The signal quality of neighboring cell C2 can be reduced by 5dB. Even though neighboring cell C2 is also a dedicated network cell, a ping-pong handover from serving cell C3 back to neighboring cell C2 should be avoided.

[0104] When electronic device 100 is at point D, the serving cell is C3, and the neighboring cell is C4. Neighboring cell C4 is directly in front of electronic device 100 in its direction of movement. The signal quality of neighboring cell C4 can be increased by 5dB so that electronic device 100 can hand over to the private network cell (neighboring cell C4) as early as possible. After the handover, the serving cell becomes C4, and the neighboring cell becomes C3. Neighboring cell C3 is directly behind electronic device 100 in its direction of movement. The signal quality of neighboring cell C3 can be reduced by 5dB. Even if neighboring cell C3 is also a private network cell, a ping-pong handover from serving cell C4 back to neighboring cell C3 should be avoided.

[0105] Based on the above analysis, the ideal handover path can be achieved as C1→C2→C3→C4, and all of these cells are private network cells.

[0106] The cell handover method provided in this application involves a base station adjusting the signal quality of neighboring cells based on the moving speed level of the electronic device and the orientation of neighboring cells relative to the moving direction of the electronic device. If the signal quality of the serving cell and the adjusted signal quality of the neighboring cells meet the handover conditions, the base station instructs the electronic device to hand over to the neighboring cell. In high-speed rail scenarios, due to the high speed of high-speed trains and the small curvature of the high-speed rail lines, dedicated network cells such as high-speed rail cells are typically located along the high-speed rail lines, while non-dedicated network cells are usually not located along the high-speed rail lines. Therefore, dedicated network cells are usually located directly in front of (or in front of) and directly behind (or behind) the moving direction of the electronic device in the train, while other non-dedicated network cells are usually located diagonally in front of, diagonally behind, or vertically in other orientations. In addition, the moving speed level of electronic devices in trains is high, while the moving speed level of electronic devices on the ground is low. Therefore, electronic devices on a train can be identified by their speed rating. The location of neighboring cells relative to the direction of movement of these devices can distinguish between private and non-private network cells. This allows for adjustments to the signal quality of neighboring cells, making it easier for these electronic devices to switch to private network cells and preventing them from switching to non-private network cells. Furthermore, the implementation cost is low, requiring no on-site measurements. Network adjustments will not affect the implementation of the solution.

[0107] As shown in Figure 10, this application embodiment provides another cell handover method, which includes steps S201-S211. In this embodiment, the electronic device adjusts the signal quality of the neighboring cell based on the moving speed level of the electronic device and the orientation of the neighboring cell relative to the moving direction of the electronic device.

[0108] S201. The base station sends mobility status parameters to the electronic device.

[0109] This step is the same as S101 and will not be repeated here.

[0110] S202. Measurement of the moving speed level and moving direction of electronic equipment.

[0111] This step is the same as S102, and will not be repeated here.

[0112] S203. The electronic device sends its mobile speed level to the base station.

[0113] In one possible implementation, the electronic device can send a UAI to the base station, the UAI including the movement speed level of the electronic device.

[0114] In another possible implementation, the electronic device can send a measurement report to the base station, which includes the movement speed level of the electronic device.

[0115] S204. The base station sends the neighboring cell frequency and the location of the neighboring cell relative to the electronic device to the electronic device; or, sends the neighboring cell frequency, the location of the serving cell, and the location of the neighboring cell.

[0116] Optionally, the electronic device can be pre-configured with adjustment parameters, eliminating the need for the base station to send these parameters and thus saving air interface overhead. Alternatively, the base station can send adjustment parameters to the electronic device to override the pre-configured parameters, allowing the electronic device to flexibly adjust according to the latest network configuration. If the electronic device is not pre-configured with adjustment parameters, the base station can send them, and the electronic device can similarly flexibly adjust according to the latest network configuration.

[0117] Electronic devices can send RRC reconfiguration messages to the base station. These messages include the neighboring cell frequency and the neighboring cell's location relative to the electronic device. Alternatively, the RRC reconfiguration message may include the neighboring cell frequency, the serving cell's location, and the neighboring cell's location. Optionally, the RRC reconfiguration message may also include adjustment parameters.

[0118] The purpose of neighboring cell frequencies is to allow electronic devices to measure the signal quality of neighboring cells on those frequencies. The locations of the serving cell and neighboring cells are used by electronic devices to determine the orientation of neighboring cells relative to the electronic devices. The orientation of neighboring cells relative to the electronic devices and the adjustment parameters are described in S106 and will not be repeated here.

[0119] S205. The base station sends adjustment parameters to the electronic equipment.

[0120] In one possible implementation, the base station can send adjustment parameters corresponding to medium and high speed levels to the electronic device, so that the electronic device can find the corresponding adjustment parameters even if its moving speed changes. For example, as shown in Table 1 or Table 2, the base station can send adjustment parameters for both high and medium speed rows to the electronic device.

[0121] In another possible implementation, the base station may also send adjustment parameters corresponding to the mobile speed level of the electronic device to save air interface overhead. For example, as shown in Table 1 or Table 2, if the mobile speed level of the electronic device is high speed, the base station may send the adjustment parameters for the "high speed" row to the electronic device.

[0122] It should be noted that step S205 is optional. If the electronic device has been configured with adjustment parameters in advance, step S205 can be omitted.

[0123] S206. Electronic equipment measurement: The signal quality of the serving cell and the signal quality of neighboring cells of the electronic equipment.

[0124] Electronic devices can prioritize measuring the signal quality of neighboring cells directly in front or diagonally in front of the direction of movement, so as to prioritize adjusting the signal quality of neighboring cells directly in front or diagonally in front, and prioritize reporting the adjusted signal quality of neighboring cells directly in front or diagonally in front, thereby switching to neighboring cells directly in front or diagonally in front as early as possible.

[0125] This step is described in S104 and will not be repeated here.

[0126] S207. The electronic device adjusts the signal quality of the neighboring cell according to the moving speed level of the electronic device and the orientation of the neighboring cell relative to the moving direction of the electronic device.

[0127] If, in S204, the base station sends the location of the neighboring cell relative to the electronic device, then firstly, the electronic device obtains the location of the neighboring cell relative to its own direction of movement based on its own direction of movement and the location of the neighboring cell relative to its own direction of movement. Then, the electronic device adjusts the signal quality of the neighboring cell based on its own speed rating and the location of the neighboring cell relative to its own direction of movement.

[0128] If, in S204, the base station sends the location of the serving cell and the locations of neighboring cells to the electronic device, then firstly, the electronic device obtains the orientation of the neighboring cells relative to the electronic device based on the locations of the serving cell and neighboring cells. Then, the electronic device obtains the orientation of the neighboring cells relative to the direction of movement of the electronic device, based on the direction of movement of the electronic device and the orientation of the neighboring cells relative to the direction of movement of the electronic device. Finally, the electronic device adjusts the signal quality of the neighboring cells based on the speed level of the electronic device and the orientation of the neighboring cells relative to the direction of movement of the electronic device.

[0129] This step specifically refers to the relevant description of the base station in S106, that is, the electronic device performs the functions of the base station in S106, which will not be repeated here. After step S207, if the electronic device is in the connected state, then S208-S210 are executed, and the base station instructs the electronic device to hand over to a neighboring cell; or, if the electronic device is in the idle state, then S211 is executed, and the electronic device reselects to a neighboring cell.

[0130] S208. The electronic device sends the measured signal quality of the serving cell and the adjusted signal quality of the neighboring cells to the base station.

[0131] Electronic devices can send measurement reports to base stations, which include the signal quality of the serving cell and the adjusted signal quality of neighboring cells.

[0132] The adjusted signal quality of neighboring cells sent by the electronic device to the base station can include the signal quality of all neighboring cells, with the base station deciding how to select neighboring cells for handover. Alternatively, the adjusted signal quality of neighboring cells sent by the electronic device to the base station can also include the signal quality of neighboring cells directly in front of it in Table 1 or in front of it in Table 2, and optionally also include the signal quality of neighboring cells diagonally in front of it in Table 1. It may exclude the signal quality of neighboring cells in the vertical direction in Table 1 or Table 2, and may also exclude the signal quality of neighboring cells diagonally behind it and directly behind it in Table 1, and may also exclude the signal quality of neighboring cells behind it in Table 2, in order to reduce air interface overhead.

[0133] For example, as shown in Figure 3, assuming electronic device 100 is at point C, the serving cell is C2, and neighboring cells are C3, C6, and C7, neighboring cell C3 is directly in front of electronic device 100 in its direction of movement, so its signal quality can be increased by 5dB. Neighboring cell C6 is diagonally behind electronic device 100 in its direction of movement, so its signal quality can be decreased by 6dB. Neighboring cell C7 is perpendicular to the direction of movement of electronic device 100 and does not require adjustment. Assuming that electronic device 100 measures the RSRP of neighboring cell C3 as -102dBm, the RSRP of neighboring cell C6 as -99dBm, and the RSRP of neighboring cell C7 as -100dBm, then after adjusting the signal quality of these neighboring cells, the RSRP of neighboring cell C3 sent to the base station will be -102dBm, the RSRP of neighboring cell C6 as -105dBm, and the RSRP of neighboring cell C7 as -100dBm.

[0134] S209. In response to the fact that the signal quality of the serving cell and the adjusted signal quality of the neighboring cells meet the handover conditions, the base station sends a handover command to the electronic equipment.

[0135] This step is the same as S107 and will not be repeated here.

[0136] S210, In response to the handover command, the electronic device hands over to a neighboring cell.

[0137] This step is described in S108 and will not be repeated here.

[0138] S211. In response to the fact that the signal quality of the serving cell and the adjusted signal quality of the neighboring cell meet the reselection conditions, the electronic device performs a reselection to the neighboring cell.

[0139] Similar to S107, the signal quality of the serving cell and the signal quality of the adjusted neighboring cells can satisfy the reselection condition if the difference between the signal quality of the adjusted neighboring cells and the signal quality of the serving cell is greater than a relative threshold. After pre-enhancing the signal quality of neighboring cells in front of the electronic device in the direction of movement, and / or pre-weakening the signal quality of neighboring cells behind the electronic device in the direction of movement, the signal quality of neighboring cells close to the electronic device is more likely to satisfy the reselection condition, while the signal quality of neighboring cells far away from the electronic device is less likely to satisfy the reselection condition, making it easier for the electronic device to reselect to neighboring cells in front of the electronic device in the direction of movement.

[0140] For example, as shown in Figure 3, electronic device 100 moves from right to left along a high-speed railway. When electronic device 100 is at point A, the serving cell is C1, and the neighboring cell is C2. Neighboring cell C2 is located directly in front of electronic device 100 in the direction of movement. The signal quality of neighboring cell C2 can be increased by 5dB so that electronic device 100 can reselect from the private network cell (neighboring cell C2) as early as possible. After reselection, the serving cell becomes C2, and the neighboring cell becomes C1. Neighboring cell C1 is located directly behind electronic device 100 in the direction of movement. The signal quality of neighboring cell C1 can be reduced by 5dB. Even if neighboring cell C1 is also a private network cell, it is necessary to avoid ping-pong reselection from serving cell C2 back to neighboring cell C1.

[0141] When electronic device 100 is at point B, the serving cell is C2 and the neighboring cell is C5. The neighboring cell C5 is located diagonally behind the moving direction of electronic device 100. The signal quality of the neighboring cell C5 can be reduced by 6dB to avoid electronic device 100 reselecting to the non-private network cell (neighboring cell C5) diagonally behind.

[0142] When electronic device 100 is at point C, the serving cell is C2, and the neighboring cells are C3, C6, and C7. Neighboring cell C3 is directly in front of electronic device 100 in its direction of movement. The signal quality of neighboring cell C3 can be increased by 5dB so that electronic device 100 can reselect from the private network cell (neighboring cell C3) ahead of it as early as possible. Neighboring cell C6 is diagonally behind electronic device 100 in its direction of movement. The signal quality of neighboring cell C6 can be reduced by 6dB to prevent electronic device 100 from reselecting from the non-private network cell (neighboring cell C6) diagonally behind it. Neighboring cell C7 is perpendicular to the direction of movement of electronic device 100, and its signal quality is not adjusted. After reselection, the serving cell becomes C3, and the neighboring cells become C2, C6, and C7. Neighboring cell C2 is directly behind electronic device 100 in its direction of movement. The signal quality of neighboring cell C2 can be reduced by 5dB. Even if neighboring cell C2 is also a private network cell, it is important to avoid ping-pong reselection from serving cell C3 back to neighboring cell C2.

[0143] When electronic device 100 is at point D, the serving cell is C3, and the neighboring cell is C4. Neighboring cell C4 is directly in front of electronic device 100 in its direction of movement. The signal quality of neighboring cell C4 can be increased by 5dB so that the electronic device can reselect from the private network cell (neighboring cell C4) as early as possible. After reselection, the serving cell becomes C4, and the neighboring cell becomes C3. Neighboring cell C3 is directly behind the electronic device in its direction of movement. The signal quality of neighboring cell C3 can be decreased by 5dB. Even if neighboring cell C3 is also a private network cell, it is necessary to avoid ping-pong reselection from serving cell C4 back to neighboring cell C3.

[0144] Based on the above analysis, the ideal reselection path can be achieved as C1→C2→C3→C4, and all of these cells are private network cells.

[0145] The cell handover method provided in this application involves an electronic device adjusting the signal quality of a neighboring cell based on its own speed and the relative position of the neighboring cell to the direction of movement. If the signal quality of the serving cell and the adjusted signal quality of the neighboring cell meet the reselection criteria, the electronic device will reselect to the neighboring cell. If the signal quality of the serving cell and the adjusted signal quality of the neighboring cell meet the handover criteria, the base station will instruct the electronic device to hand over to the neighboring cell. In high-speed rail scenarios, due to the high speed and small curvature of the high-speed rail lines, dedicated network cells, such as high-speed rail cells, are typically located along the high-speed rail lines, while non-dedicated network cells are usually not. Therefore, dedicated network cells are typically located directly in front of (or in front of) and directly behind (or behind) the direction of movement of the electronic device on the train, while other non-dedicated network cells are typically located diagonally in front of, diagonally behind, or vertically to the direction of movement of the electronic device on the train. Furthermore, the speed of electronic devices on trains is relatively high, while the speed of electronic devices on the ground is relatively low. Therefore, electronic devices on a train can be identified by their speed rating. The location of neighboring cells relative to the direction of movement of these devices can distinguish between private and non-private network cells. This allows for adjustments to the signal quality of these neighboring cells, making it easier for these electronic devices to switch or reselect to private network cells, and preventing them from switching or reselecting to non-private network cells. Furthermore, the implementation cost is low, requiring no on-site measurement. Network adjustments will not affect the implementation of the solution.

[0146] As shown in Figure 11, this application embodiment provides another cell handover method, which includes steps S301-S312. In this embodiment, both the electronic device and the base station adjust the signal quality of the neighboring cell based on the moving speed level of the electronic device and the orientation of the neighboring cell relative to the moving direction of the electronic device, thereby further improving the speed at which the electronic device can hand over to the neighboring cell in advance.

[0147] S301. The base station sends mobility status parameters to the electronic device.

[0148] This step is the same as S101 and will not be repeated here.

[0149] S302. Electronic equipment: Measuring the speed level and direction of movement of electronic equipment.

[0150] This step is the same as S102, and will not be repeated here.

[0151] S303. The electronic device sends its speed level and direction of movement to the base station.

[0152] This step is described in S103 and will not be repeated here.

[0153] S304. The base station sends the neighboring cell frequency and the location of the neighboring cell relative to the electronic device to the electronic device; or, sends the neighboring cell frequency, the location of the serving cell, and the location of the neighboring cell.

[0154] This step is described in accordance with S204 and will not be repeated here.

[0155] S305, The base station sends adjustment parameters to the electronic equipment.

[0156] This step is described in accordance with S205 and will not be repeated here.

[0157] S306. Electronic equipment: Measuring the signal quality of the serving cell and the signal quality of neighboring cells of the electronic equipment.

[0158] This step is described in accordance with S206 and will not be repeated here.

[0159] S307. The electronic device adjusts the signal quality of the neighboring cell based on the moving speed level of the electronic device and the orientation of the neighboring cell relative to the moving direction of the electronic device.

[0160] After step S307, if the electronic device is in the connected state, steps S308-S311 are executed, whereby the base station instructs the electronic device to hand over to a neighboring cell; or, if the electronic device is in the idle state, step S312 is executed, whereby the electronic device reselects to a neighboring cell. Other details of this step are the same as in step S207 and will not be repeated here.

[0161] S308. Electronic devices send the measured signal quality of the serving cell and the adjusted signal quality of neighboring cells to the base station.

[0162] This step is described in accordance with S208 and will not be repeated here.

[0163] S309. The base station adjusts the signal quality of neighboring cells based on the moving speed level of the electronic equipment and the orientation of the neighboring cells relative to the moving direction of the electronic equipment.

[0164] In S307, the electronic device has already adjusted the signal quality of the neighboring cell based on its moving speed level and the orientation of the neighboring cell relative to its moving direction. In S309, the base station further adjusts the signal quality of the neighboring cell based on the moving speed level of the electronic device and the orientation of the neighboring cell relative to its moving direction, as detailed in S106. The purpose of this step is to further adjust the signal quality of the neighboring cell by the base station, building upon the initial adjustment made by the electronic device, thereby further improving the speed at which the electronic device can switch to the neighboring cell in advance.

[0165] S310. In response to the fact that the signal quality of the serving cell and the adjusted signal quality of the neighboring cells meet the handover conditions, the base station sends a handover command to the electronic equipment.

[0166] This step is the same as S107 and will not be repeated here.

[0167] S311. In response to a handover command, the electronic device switches to a neighboring cell.

[0168] This step is described in S108 and will not be repeated here.

[0169] S312. In response to the fact that the signal quality of the serving cell and the adjusted signal quality of the neighboring cell meet the reselection conditions, the electronic device performs a reselection to the neighboring cell.

[0170] This step is the same as S211 and will not be repeated here.

[0171] The cell handover method provided in this application embodiment is a combination of the schemes shown in Figures 7 and 10. In addition to the technical effects of these two schemes, both the electronic device and the base station adjust the signal quality of the neighboring cell according to the moving speed level of the electronic device and the orientation of the neighboring cell relative to the moving direction of the electronic device, thereby further improving the speed at which the electronic device can hand over to the neighboring cell in advance.

[0172] Furthermore, the embodiments of this application can also be applied to RLF prediction or handover failure (HO failure) prediction based on machine learning or artificial intelligence. That is, based on the orientation of neighboring cells relative to the movement direction of the electronic device, the probability of RLF or handover failure of neighboring cells is predicted. For example, neighboring cells located directly in front of, diagonally in front of, or in front of the electronic device's movement direction have a lower probability of RLF or handover failure in the future because the electronic device will approach these neighboring cells in the future. Neighboring cells located directly behind, diagonally behind, or behind the electronic device's movement direction have a higher probability of RLF or handover failure in the future because the electronic device will move away from these neighboring cells in the future. RLF prediction can be used for simulation assumption and evaluation methodology, such as for scenario prioritization, channel modeling evaluation, and other simulation parameters. Scenario prioritization can include performing RLF prediction on the FR2 carrier in the time domain, performing RLF prediction or handover failure prediction during FR2-to-FR2 handover in high-speed scenarios, performing RLF prediction or handover failure prediction for FR1 and FR2 in RAN2 scenarios, and so on.

[0173] This application embodiment also provides a communication device for performing the functions of the electronic devices shown in Figures 7, 10, and 11. As shown in Figure 12, the communication device 120 includes a processing module 1201 and a transceiver module 1202. The processing module 1201 is used to perform processing-related operations of the electronic device in the preceding method embodiments, and the transceiver module 1202 is used to perform transmission-reception-related operations of the electronic device in the preceding method embodiments.

[0174] In some embodiments, the processing module 1201 is used to measure the moving speed level and moving direction of the electronic device; and to measure the signal quality of the serving cell and the signal quality of neighboring cells.

[0175] The processing module 1201 responds to the condition that the signal quality of the serving cell and the signal quality of the adjusted neighboring cell meet the requirements, and performs handover or reselection to the neighboring cell. The adjustment refers to the adjustment based on the moving speed level of the electronic device and the orientation of the neighboring cell relative to the moving direction.

[0176] In some embodiments, the transceiver module 1202 is used to send the mobile speed level and mobile direction to the base station; and to send the measured signal quality of the serving cell and the measured signal quality of the neighboring cells to the base station.

[0177] In some embodiments, the processing module 1201 is further configured to adjust the signal quality of the neighboring cell according to the moving speed level and the orientation of the neighboring cell relative to the moving direction.

[0178] The transceiver module 1202 is also used to send the measured signal quality of the serving cell and the adjusted signal quality of the neighboring cells to the base station.

[0179] In some embodiments, the transceiver module 1202 is further configured to receive from the base station the orientation of a neighboring cell relative to an electronic device.

[0180] The processing module 1201 is also used to obtain the orientation of the neighboring cell relative to the direction of movement based on the direction of movement and the orientation of the neighboring cell relative to the electronic device.

[0181] In some embodiments, the transceiver module 1202 is further configured to receive the location of the serving cell and the location of neighboring cells from the base station.

[0182] The processing module 1201 is also used to obtain the orientation of the neighboring cell relative to the electronic device based on the location of the serving cell and the location of the neighboring cell.

[0183] The processing module 1201 is also used to obtain the orientation of the neighboring cell relative to the direction of movement based on the direction of movement and the orientation of the neighboring cell relative to the electronic device.

[0184] In some embodiments, the transceiver module 1202 is further configured to receive adjustment parameters from the base station, the adjustment parameters indicating the adjustment value of the signal quality of the neighboring cell corresponding to each moving speed level and each orientation of the neighboring cell relative to the moving direction.

[0185] In some embodiments, the processing module 1201 is specifically used to pre-enhance the signal quality of neighboring cells in front of the moving direction of the electronic device, and / or pre-weaken the signal quality of neighboring cells behind the moving direction of the electronic device; wherein, under the same orientation, the greater the moving speed level of the electronic device, the greater the adjustment range.

[0186] This application embodiment also provides a communication device for performing the functions of the base station shown in Figures 7, 10, and 11. As shown in Figure 13, the communication device 130 includes a processing module 1301 and a transceiver module 1302. The processing module 1301 is used to perform processing-related operations of the base station in the preceding method embodiments, and the transceiver module 1302 is used to perform transmission-reception-related operations of the base station in the preceding method embodiments.

[0187] In some embodiments, the transceiver module 1302 is used to receive the signal quality of the serving cell and the signal quality of neighboring cells from the electronic device. It sends a handover command to the electronic device, instructing the electronic device to hand over to a neighboring cell; the handover command is triggered when the signal quality of the serving cell and the adjusted signal quality of the neighboring cell meet certain conditions, where adjustment refers to adjustments based on the moving speed level of the electronic device and the orientation of the neighboring cell relative to the moving direction.

[0188] In some embodiments, the transceiver module 1302 is specifically used to receive the movement speed level and movement direction from the electronic device.

[0189] The processing module 1301 is used to adjust the signal quality of the neighboring cell according to the moving speed level and the orientation of the neighboring cell relative to the moving direction.

[0190] In some embodiments, the transceiver module 1302 is further configured to send the location of the neighboring cell relative to the electronic device to the electronic device.

[0191] In some embodiments, the transceiver module 1302 is further configured to send the location of the serving cell and the location of neighboring cells to the electronic device.

[0192] In some embodiments, the transceiver module 1302 is further configured to send adjustment parameters to the electronic device, the adjustment parameters indicating the adjustment value of the signal quality of the neighboring cell corresponding to each moving speed level and each orientation of the neighboring cell relative to the moving direction.

[0193] In some embodiments, the processing module 1301 is specifically used to pre-enhance the signal quality of neighboring cells in front of the moving direction of the electronic device, and / or pre-weaken the signal quality of neighboring cells behind the moving direction of the electronic device; wherein, under the same orientation, the greater the moving speed level of the electronic device, the greater the adjustment range.

[0194] This application also provides a computer-readable storage medium including instructions that, when executed on the electronic device or base station, cause the electronic device or base station to perform the steps in the above method embodiments, such as performing the methods shown in FIG7, FIG10, and FIG11.

[0195] This application also provides a computer program product including instructions that, when executed on the aforementioned electronic device or base station, cause the electronic device or base station to perform the various steps in the above method embodiments, such as executing the methods shown in FIG7, FIG10, and FIG11.

[0196] The technical effects of the communication device, computer-readable storage medium, and computer program product are described above in the preceding method embodiments.

[0197] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0198] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0199] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0200] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or modules may be electrical, mechanical, or other forms.

[0201] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located on one device or distributed across multiple devices. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0202] In addition, the functional modules in the various embodiments of this application can be integrated into one device, or each module can exist physically separately, or two or more modules can be integrated into one device.

[0203] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cell handover method, characterized in that, Applied to electronic devices, the method includes: Measure the moving speed level and moving direction of the electronic device; Measure the signal quality of the serving cell and the signal quality of neighboring cells; In response to the fact that the signal quality of the serving cell and the adjusted signal quality of the neighboring cell meet the conditions, a handover or reselection is performed to the neighboring cell. The adjustment refers to the adjustment based on the moving speed level of the electronic device and the orientation of the neighboring cell relative to the moving direction.

2. The method according to claim 1, characterized in that, Also includes: Send the movement speed level and movement direction to the base station; The base station sends measurements of the signal quality of the serving cell and the signal quality of the neighboring cells.

3. The method according to claim 1, characterized in that, Also includes: The signal quality of the neighboring cell is adjusted based on the moving speed level and the orientation of the neighboring cell relative to the moving direction; The base station sends the measured signal quality of the serving cell and the adjusted signal quality of the neighboring cells.

4. The method according to claim 3, characterized in that, Also includes: Receive the location of the neighboring cell relative to the electronic device from the base station; The orientation of the neighboring area relative to the moving direction is obtained based on the moving direction and the orientation of the neighboring area relative to the electronic device.

5. The method according to claim 3, characterized in that, Also includes: Receive the location of the serving cell and the location of the neighboring cells from the base station; Based on the location of the serving cell and the location of the neighboring cells, the orientation of the neighboring cells relative to the electronic device is obtained; The orientation of the neighboring area relative to the moving direction is obtained based on the moving direction and the orientation of the neighboring area relative to the electronic device.

6. The method according to any one of claims 3-5, characterized in that, Also includes: The base station receives adjustment parameters, which indicate the adjustment value of the signal quality of the neighboring cell corresponding to each of the moving speed levels and each position of the neighboring cell relative to the moving direction.

7. The method according to any one of claims 1-5, characterized in that, The adjustment based on the moving speed level of the electronic device and the orientation of the neighboring area relative to the moving direction includes: The signal quality of the neighboring area in front of the moving direction of the electronic device is pre-enhanced, and / or the signal quality of the neighboring area behind the moving direction of the electronic device is pre-weakened; wherein, under the same orientation, the greater the moving speed level of the electronic device, the greater the adjustment range.

8. A cell handover method, characterized in that, Applied to a base station, the method includes: Receive the signal quality of the serving cell and the signal quality of neighboring cells from electronic devices; A handover command is sent to the electronic device, which instructs the electronic device to hand over to a neighboring cell. The handover command is triggered when the signal quality of the serving cell and the adjusted signal quality of the neighboring cell meet certain conditions. The adjustment refers to adjusting the signal quality based on the moving speed level of the electronic device and the orientation of the neighboring cell relative to the moving direction.

9. The method according to claim 8, characterized in that, The signal quality of the serving cell and the signal quality of neighboring cells received from the electronic device are obtained by measurement by the electronic device, and the method further includes: Receive the movement speed level and the movement direction from the electronic device; The signal quality of the neighboring cell is adjusted based on the moving speed level and the orientation of the neighboring cell relative to the moving direction.

10. The method according to claim 8, characterized in that, The signal quality of the neighboring cell received from the electronic device is the adjusted signal quality of the neighboring cell.

11. The method according to claim 10, characterized in that, Also includes: The location of the neighboring cell relative to the electronic device is sent to the electronic device.

12. The method according to claim 10, characterized in that, Also includes: The location of the serving cell and the location of the neighboring cells are sent to the electronic device.

13. The method according to any one of claims 10-12, characterized in that, Also includes: The electronic device is sent adjustment parameters, which indicate the adjustment value of the signal quality of the neighboring cell corresponding to each of the moving speed levels and each orientation of the neighboring cell relative to the moving direction.

14. The method according to any one of claims 8-12, characterized in that, The adjustment based on the moving speed level of the electronic device and the orientation of the neighboring area relative to the moving direction includes: The signal quality of the neighboring area in front of the moving direction of the electronic device is pre-enhanced, and / or the signal quality of the neighboring area behind the moving direction of the electronic device is pre-weakened; wherein, under the same orientation, the greater the moving speed level of the electronic device, the greater the adjustment range.

15. An electronic device, characterized in that, The electronic device includes a processor and a memory, wherein the memory stores instructions, and when the processor executes the instructions, the electronic device performs the method as described in any one of claims 1-7.

16. A base station, characterized in that, The system includes a processor and a memory, wherein the memory stores instructions, and when the processor executes the instructions, the base station performs the method as described in any one of claims 8-14.

17. A communication system, characterized in that, This includes the electronic device as described in claim 15 and the base station as described in claim 16.

18. A computer-readable storage medium, characterized in that, Includes instructions that, when executed on an electronic device, cause the electronic device to perform the method as described in any one of claims 1-7.

19. A computer-readable storage medium, characterized in that, Includes instructions that, when executed on a base station, cause the base station to perform the method as described in any one of claims 8-14.

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