Communication method and communication device

Abstract

The invention provides a communication method and a communication device. According to the technical scheme, the method comprises the steps that first configuration information is obtained, the first configuration information is used for indicating terminal equipment to execute first switching, and the first switching is used for avoiding PCI collision; and acquiring second configuration information, wherein the second configuration information is used for instructing the terminal equipment to cancel execution of the first switching. According to the technical scheme provided by the invention, the switching times of the terminal equipment can be reduced by canceling the first switching executed by the terminal equipment, so that the complexity, the signaling loss and the power consumption of the terminal equipment can be reduced.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a communication method and a communication device. Background Art

[0002] In non-terrestrial network (NTN) technology, such as the low earth orbit (LEO) NTN communication system, the pitch angle and azimuth angle of the satellite's beam may not change with the movement of the satellite, so that the projection topology of the satellite beam on the ground will move at the same speed as the movement of the satellite, and then the topology of the satellite cell composed of the satellite beam on the ground will also move in the direction of the satellite movement. This cell can be called an earth moving cell.

[0003] When LEO NTN provides communication services to terminal devices through ground mobile cells, problems such as high signaling overhead and high terminal power consumption will occur. Summary of the invention

[0004] The present application provides a communication method and a communication device, which can reduce the signaling overhead and the power consumption of the terminal when providing communication services to the terminal equipment through the ground mobile cell in a non-ground communication network.

[0005] In a first aspect, the present application provides a communication method, including: obtaining first configuration information, the first configuration information is used to instruct a terminal device to perform a first switch, the first switch is used to avoid a physical cell identifier PCI collision; obtaining second configuration information, the second configuration information is used to instruct the terminal device to cancel the execution of the first switch.

[0006] As an example, when the geographical isolation between two or more co-frequency cells with the same physical cell identifier (PCI) is too small, so that the terminal equipment (UE) cannot synchronize signals normally in the signal overlapping area of ​​these two or more cells, it can be considered that a PCI collision has occurred in these cells.

[0007] As an example, a mode 30 conflict, that is, when the PCI mod 30 values ​​of two or more co-frequency cells are the same, it can be considered that these cells have a PCI collision.

[0008] As an example, two or more cells where the PCI collision occurs belong to different satellites respectively.

[0009] As an example, avoiding PCI collision may be understood as preventing the PCIs of cells where PCI collision occurs from colliding again.

[0010] Optionally, the first configuration information may be UE-level radio resource control reconfiguration (RRC-reconfiguration) signaling.

[0011] As an example, the first configuration information may be a new radio (NR) measurement switching configuration, including a measurement object, a measurement report configuration, and the like.

[0012] As another example, the first configuration information may be a conditional handover (CHO) handover configuration, including a configuration of a CHO candidate cell and a CHO execution condition, and the like.

[0013] Optionally, when the first cell of the first satellite provides communication services for the terminal device, the network device can predict that the first cell will have a PCI collision with an adjacent cell, and thus send the first configuration information to the terminal device to avoid the PCI collision. Accordingly, the terminal device can receive the first configuration information and perform a first handover according to the first configuration information. Before the terminal device performs the first handover, it can also be determined through a judgment condition whether the terminal device needs to cancel the execution of the first handover. If the terminal device cancels the execution of the first handover, it can be indicated through the second configuration information.

[0014] In the present technical solution, by canceling the execution of the first switching, the switching times of the terminal device can be reduced, thereby reducing the complexity, signaling loss and power consumption of the terminal device.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the terminal device is located at the edge of a first mobile cell, the first mobile cell is the service cell of the terminal device, the PCI of the first mobile cell is the same as the PCI of the second mobile cell, and the second mobile cell is a cell adjacent to the first mobile cell in the moving direction of the terminal device.

[0016] As an example, the first mobile cell may be a cell under a first satellite, and the second mobile cell may be a cell under a second satellite.

[0017] Optionally, the terminal device may be considered to be located at the edge of the first mobile cell when the following conditions are met: the difference between the distance from the location of the terminal device to the center point of the first mobile cell and the radius of the first mobile cell is less than or equal to a distance threshold. The distance threshold may be set according to actual needs and is not specifically limited here.

[0018] Optionally, the terminal device may also consider that the terminal device is located at the edge of the first mobile cell when the following conditions are met: if the reference signal receiving power (RSRP) of the synchronization signal block (synchronization signal / PBCHblock, SSB) of the first mobile cell measured and reported by the terminal device is less than or equal to a threshold value. The threshold value can be set according to actual needs and is not specifically limited here.

[0019] This implementation provides a decision condition, and when the decision condition is met, the terminal device can cancel the first handover, thereby reducing signaling overhead and power consumption of the terminal device. The decision condition includes: the terminal device is at the edge of the first mobile cell, and the terminal device will move from the first mobile cell to the second mobile cell, and the PCI of the first mobile cell is the same as that of the second mobile cell.

[0020] In combination with the first aspect, in some implementations of the first aspect, the method further includes: acquiring third configuration information, where the third configuration information includes a measurement report configuration of a report global cell identity reportCGI type.

[0021] In this implementation, the terminal device may obtain the third configuration information from the network device side, and the third configuration information is used to instruct the terminal device to perform mobility switching. Accordingly, the network device sends the third configuration information to the terminal device.

[0022] In some exemplary scenarios, when a low earth orbit (LEO) non-terrestrial network (NTN) provides communication services to terminal devices through ground mobile cells, the first cell that provides communication services to the terminal devices is always in motion, and the moving speed of the cell is usually greater than the moving speed of the terminal device, so that the terminal device at the edge of the first cell needs to perform mobility switching. When the network device is ready to instruct the terminal device to perform mobility switching from the first cell to the second cell, but the PCI of the first cell is the same as that of the second cell and the terminal device cancels the execution of the first switching, the network device will be unable to determine the target cell, so that the terminal device cannot perform mobility switching normally. In this example, the target cell is the second cell.

[0023] In the above scenario, the third configuration information may be a measurement report configuration including a report cellglobal identifier (reportCGI) type. The terminal device may report the CGI of the first cell and the second cell according to the third configuration information, so that the network device may distinguish the first cell and the second cell, and instruct the terminal device to switch mobility from the first cell to the second cell.

[0024] In combination with the first aspect, in some implementations of the first aspect, the method also includes: obtaining third configuration information, wherein the third configuration information is used to instruct the terminal device to perform mobility switching; wherein the first configuration information includes a first moment for performing the first switching, the third configuration information includes a second moment for performing the mobility switching, and the time difference between the first moment and the second moment is less than or equal to a first time threshold; or, the first configuration information includes a first time window for performing the first switching, the third configuration information includes a second time window for performing the mobility switching, the time length of the overlapping area between the first time window and the second time window is less than or equal to the second time threshold, or the time difference between the starting moment of the first time window and the starting moment of the second time window is less than or equal to the third time threshold.

[0025] Optionally, the terminal device may obtain third configuration information from the network device side, where the third configuration information is used to instruct the terminal device to perform mobility switching. Accordingly, the network device sends the third configuration information to the terminal device.

[0026] Optionally, the third configuration information may be RRC-reconfiguration signaling at the UE level.

[0027] As an example, the third configuration information may be NR measurement switching configuration, including measurement object, measurement report configuration, etc.

[0028] In this example, after receiving the third configuration information, the terminal device can measure the measurement object according to the third configuration information and report the measurement report to the network device. After receiving the measurement report, the network device determines whether there is a suitable target cell. If there is a suitable target cell, the terminal device is instructing to perform mobility switching at time T1, so that the terminal device switches to the target cell at time T1.

[0029] It should be noted that in this implementation, the first switching can be predicted, so the first moment of executing the first switching can be determined according to the time when the PCI collision occurs. As an example, the first moment can be the moment when the PCI collision occurs, or it can be the moment when the fourth time threshold is satisfied between the moment when the PCI collision occurs, which is not specifically limited here.

[0030] As another example, the first configuration information and the third configuration information may be CHO switching configurations, including configurations of CHO candidate cells and CHO execution conditions, etc. Among them, the CHO execution conditions may be CHO conditions based on time triggering. For example, if the first configuration information is a CHO configuration based on time triggering, and the CHO execution condition is that the terminal device performs CHO switching of the target cell within the time window [t1, t2], then the first time window is [t1, t2], and the starting time of the first time window is t1.

[0031] Optionally, the first time threshold, the second time threshold, the third time threshold and the fourth time threshold may be set according to actual needs and are not specifically limited here.

[0032] This implementation method provides a decision condition. When the decision condition is met, the terminal device can cancel the first switching, thereby reducing signaling overhead and power consumption of the terminal device.

[0033] In combination with the first aspect, in certain implementations of the first aspect, the second configuration information is carried in at least one of the following messages: radio resource control RRC signaling, control layer control element MAC CE signaling, downlink control information DCI, multicast message; or, the second configuration information is carried in at least one of the following messages: physical uplink shared channel PUSCH, physical uplink control channel PUCCH.

[0034] In this implementation, if the method is implemented by a network device, the second configuration information can be carried in at least one message among RRC signaling, media access control control element (MAC CE) signaling, downlink control information (DCI), and multicast message, and forwarded downlink by the network device to the terminal device.

[0035] In this implementation, if the method is implemented by a terminal device, the second configuration information can be carried in at least one message in a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH), and transmitted by the terminal device to the network device.

[0036] In combination with the first aspect, in some implementations of the first aspect, the length of the second configuration information is 1 bit.

[0037] As an example, when the value of the second configuration information is "0", it indicates that the terminal device cancels the execution of the first switching, or when the value of the second configuration information is "1", it indicates that the terminal device cancels the execution of the first switching.

[0038] In combination with the first aspect, in some implementations of the first aspect, the method further includes: sending the first configuration information; wherein the obtaining the second configuration information includes: receiving the second configuration information.

[0039] In this implementation, the method can be executed by a network device, and the network device can send a first configuration message to a terminal device to instruct the terminal device to perform a first switch when a PCI collision occurs; after receiving the first configuration message, the terminal device determines whether to cancel the first switch based on a judgment condition, and if the first switch is to be canceled, the terminal device sends a second configuration message to the network device to instruct the terminal device to cancel the first switch, and the terminal device cancels the first switch at the same time; after receiving the second configuration message, the network device cancels the network resources reserved for the terminal device to perform the first switch, thereby saving resources.

[0040] In combination with the first aspect, in some implementations of the first aspect, the method further includes: sending the first configuration information; and sending the second configuration information.

[0041] In this implementation, the method can be executed by a network device, and the network device can send a first configuration message to a terminal device to instruct the terminal device to perform a first switch when a PCI collision occurs; after receiving the first configuration message, the terminal device performs the first switch at the first moment according to the instruction of the first configuration message, or performs the first switch in the first time window. At the same time, the network device will also determine whether the terminal device needs to cancel the first switch according to the judgment condition. If the first switch is canceled, the network device will send a second configuration message to the terminal device to instruct the terminal device to cancel the first switch, and the network device will cancel the network resources reserved for the terminal device for performing the first switch; after receiving the second configuration message, the terminal device cancels the first switch, thereby reducing signaling overhead and terminal device losses.

[0042] In combination with the first aspect, in some implementations of the first aspect, the acquiring the first configuration information includes: receiving the first configuration information; and the method further includes: sending the second configuration information.

[0043] In this implementation, the method can be executed by a terminal device, and the terminal device can receive first configuration information sent by a network device, the first configuration information being used to instruct the terminal device to perform a first switch when a PCI collision occurs; after receiving the first configuration information, the terminal device determines whether to cancel the first switch based on a judgment condition, and if the first switch is to be canceled, the terminal device sends second configuration information to the network device to instruct the terminal device to cancel the first switch, and the terminal device cancels the first switch at the same time; after receiving the second configuration information, the network device cancels the network resources reserved for the terminal device for performing the first switch, thereby saving resources.

[0044] In combination with the first aspect, in some implementations of the first aspect, the obtaining of the first configuration information includes: receiving the first configuration information; and the obtaining of the second configuration information includes: receiving the second configuration information.

[0045] In this implementation, the method can be executed by a terminal device, and the terminal device can receive first configuration information sent by a network device, where the first configuration information is used to instruct the terminal device to perform a first switch when a PCI collision occurs; after receiving the first configuration information, the terminal device performs the first switch at the first moment or in the first time window according to the instruction of the first configuration information.

[0046] At the same time, the terminal device can also receive the second configuration information sent by the network device, and the second configuration information is used to instruct the terminal device to cancel the first switch. After receiving the second configuration information, the terminal device cancels the first switch, thereby reducing signaling overhead and terminal device losses.

[0047] Optionally, the method, step or operation performed by the network device in the first aspect may also be performed by a chip system, hardware circuit and / or software module applied to the network device. This application is uniformly described in terms of the network device.

[0048] Optionally, the method, step or operation performed by the terminal device in the first aspect may also be performed by a chip system, hardware circuit and / or software module applied to the terminal device. This application is uniformly described in terms of the terminal device.

[0049] In a second aspect, the present application provides a communication device, which includes modules for implementing the method in the first aspect or any one of the implementations thereof, and each module can be implemented in the form of hardware and / or software.

[0050] For example, the device may include: an acquisition module. The acquisition module is used to acquire first configuration information, the first configuration information is used to instruct the terminal device to perform a first switch, the first switch is used to avoid a physical cell identifier PCI collision; the acquisition module is also used to acquire second configuration information, the second configuration information is used to instruct the terminal device to cancel the first switch.

[0051] In combination with the second aspect, in certain implementations of the second aspect, the terminal device is located at the edge of a first mobile cell, the first mobile cell is the service cell of the terminal device, the PCI of the first mobile cell is the same as the PCI of the second mobile cell, and the second mobile cell is a cell adjacent to the first mobile cell in the moving direction of the terminal device.

[0052] In combination with the second aspect, in some implementations of the second aspect, the acquisition module is further used to acquire third configuration information, where the third configuration information includes a measurement report configuration of a report global cell identity reportCGI type.

[0053] In combination with the second aspect, in some implementations of the second aspect, the above-mentioned acquisition module is also used to acquire third configuration information, and the third configuration information is used to instruct the terminal device to perform mobility switching; wherein, the first configuration information includes a first moment for performing the first switching, and the third configuration information includes a second moment for performing the mobility switching, and the time difference between the first moment and the second moment is less than or equal to a first time threshold; or, the first configuration information includes a first time window for performing the first switching, and the third configuration information includes a second time window for performing the mobility switching, and the time length of the overlapping area between the first time window and the second time window is less than or equal to the second time threshold, or the time difference between the starting moment of the first time window and the starting moment of the second time window is less than or equal to the third time threshold.

[0054] In combination with the second aspect, in certain implementations of the second aspect, the second configuration information is carried in at least one of the following messages: radio resource control RRC signaling, control layer control element MAC CE signaling, downlink control information DCI, multicast message; or, the second configuration information is carried in at least one of the following messages: physical uplink shared channel PUSCH, physical uplink control channel PUCCH.

[0055] In combination with the second aspect, in some implementations of the second aspect, the length of the second configuration information is 1 bit.

[0056] In combination with the second aspect, in some implementations of the second aspect, the device may further include a sending module, the sending module being used to send the first configuration information; and the above-mentioned acquisition module is specifically used to receive the second configuration information.

[0057] In combination with the second aspect, in some implementations of the second aspect, the device may further include a sending module, the sending module is further used to send the first configuration information; the sending module is further used to send the second configuration information.

[0058] In combination with the second aspect, in some implementations of the second aspect, the acquisition module is specifically used to receive the first configuration information; and the device also includes a sending module, which is used to send the second configuration information.

[0059] In combination with the second aspect, in some implementations of the second aspect, the acquisition module is specifically used to receive the first configuration information; the acquisition module is also specifically used to receive the second configuration information.

[0060] Optionally, the apparatus may further include: a processing module. The processing module is used to determine whether the terminal device cancels the first handover; the processing module is also used to determine the PCI collision cell; the processing module is also used to execute the handover, such as the first handover and the mobility handover.

[0061] In a third aspect, the present application provides a communication device, including a processor, which can be coupled to a memory and is used to call a program code in the memory to execute the method as described in the first aspect or any possible implementation thereof. Optionally, the device also includes a memory. Optionally, the device also includes a communication interface, and the processor is coupled to the communication interface.

[0062] Optionally, the apparatus may be a terminal device, or a chip system, a hardware circuit and / or a software module applied in the terminal device.

[0063] Optionally, the apparatus may be a network device, or a chip system, a hardware circuit and / or a software module applied in a network device.

[0064] In a fourth aspect, the present application provides a communication system, comprising a terminal device and a network device for executing the method described in the first aspect or any possible implementation method thereof.

[0065] In a fifth aspect, the present application provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the method as described in the first aspect or any possible implementation thereof.

[0066] In a sixth aspect, the present application provides a computer-readable medium storing a program code for execution by a device, wherein the program code includes a method for executing the method described in the first aspect or any possible implementation method thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 A schematic diagram of a PCI collision in a single-satellite single-cell scenario provided in one embodiment of the present application;

[0068] Figure 2a A schematic diagram of an application scenario provided for an embodiment of the present application;

[0069] Figure 2b A schematic diagram of an application scenario provided for an embodiment of the present application;

[0070] Figure 2c A schematic diagram of an application scenario provided for an embodiment of the present application;

[0071] Figure 3 A schematic diagram of a communication method provided by an embodiment of the present application;

[0072] Figure 4 A schematic diagram of a communication method provided in yet another embodiment of the present application;

[0073] Figure 5 A schematic diagram of a switching scenario provided for an embodiment of the present application;

[0074] Figure 6 A schematic diagram of a communication method provided in yet another embodiment of the present application;

[0075] Figure 7 A schematic diagram of the structure of a communication device provided in one embodiment of the present application;

[0076] Figure 8 A schematic diagram of the structure of a communication device provided in yet another embodiment of the present application.

[0077] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0078] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0079] The non-terrestrial networks (NTN) initiated by the 3rd generation partnership project (3GPP) is committed to integrating satellite communications with the fifth generation (5G) mobile communication system, so as to realize a satellite-ground fusion network that integrates satellite networks and terrestrial networks, and further realize three-dimensional network coverage of natural spaces such as space, sky, land, and ocean.

[0080] In NTN technology, for example, in a low earth orbit (LEO) NTN communication system, the pitch angle and azimuth angle of the satellite's beam may not change with the movement of the satellite, so that the projection topology of the satellite beam on the ground will move at the same speed as the movement of the satellite, and then the topology of the satellite cell composed of the satellite beam on the ground will also move in the direction of the satellite movement. This cell can be called an earth moving cell.

[0081] For terrestrial mobile cells, each cell is assigned a physical cell identifier (PCI). The PCI can be calculated using the following formula:

[0082]

[0083] in, is the PCI of the cell, is the first cell identifier, which can be calculated according to the pseudo-random sequence (such as the gold sequence) used by the secondary synchronization signals (SSS) of the synchronization signal block (synchronization signal / PBCH block, SSB), and the value range is 0 to 335; It is the second cell identifier, which can be calculated based on the pseudo-random sequence (such as m-sequence) used by the primary synchronization signal (PSS) of SSB. The value range is 0, 1, 2. Therefore, the value range of PCI is 0 to 1007.

[0084] The PCI of the terrestrial mobile cell can be bound to the satellite, and the satellite is responsible for managing and allocating the PCI of each cell under the satellite. For example, when there are multiple cells under the first satellite, the satellite allocates a PCI to each cell, so that the PCIs of the cells under the satellite are not repeated.

[0085] Optionally, the PCI of the ground mobile cell can also be bound to the ground station, and the ground station is responsible for managing and allocating the PCI of each cell under the satellite corresponding to the ground station. The PCI allocated by the ground station to each cell is also non-repetitive.

[0086] However, when there are multiple satellites in the NTN communication system, PCI collision may occur.

[0087] As an example, when the geographical isolation between two or more co-frequency cells with the same PCI is too small, so that the terminal equipment (UE) cannot synchronize signals normally in the signal overlapping area of ​​these two or more cells, it can be considered that a PCI collision has occurred in these cells.

[0088] As an example, a mode 30 conflict, that is, when the PCI mod 30 values ​​of two or more co-frequency cells are the same, it can be considered that these cells have a PCI collision.

[0089] It should be understood that the two or more co-frequency cells where the PCI collision occurs should belong to different satellites, and the scale of the PCI collision will increase with the increase of the satellite scale and the number of cells under the satellite.

[0090] For example, Figure 1 A schematic diagram of a PCI collision in a single satellite and single cell scenario provided by an embodiment of the present application. Figure 1 As shown, cell A is a cell under the first satellite, and cell B is a cell under the second satellite. The frequencies of cell A and cell B are both F1, the PCIs of cell A and cell B are both 1, and the network service ranges of cell A and cell B overlap (e.g. Figure 1 If the cell A and the cell B have a PCI collision, then

[0091] In the NTN communication system, in order to avoid PCI collision, the network device can calculate the topological information of the cell under the satellite based on the ephemeris information or other information of the current satellite, and replace the PCI of the cell under the satellite where the PCI collision is about to occur based on the relative position relationship between the satellites. In the satellite transparent transmission scenario, the network device can be a base station deployed on the ground; in the satellite regeneration scenario, the network device can be a satellite. Exemplarily, if the network device detects that the PCI and frequency of the first cell of the first satellite are the same as the PCI and frequency of the second cell of the second satellite, and the relative distance between the first cell and the second cell is gradually decreasing, the network device can replace the PCI of the first cell to avoid this PCI collision.

[0092] Among them, the network device replaces the PCI of the cell under the satellite where the PCI collision is about to occur, including replacing the configuration of the sequence, scrambling code, etc. related to the PCI of the cell, for example, replacing the SSB beam configuration of the cell. After the network device replaces the PCI of the cell, the terminal device in the cell needs to re-interpret the new SSB beam configuration and access the cell after the PCI is updated. In this embodiment, for the convenience of description, the cell under the satellite where the PCI collision occurs is called a PCI collision cell, and the switching process triggered by the terminal device in the PCI collision cell to avoid the PCI collision is called the first switching.

[0093] However, when the terminal device performs the first switch, since the PCI collision cell is always in motion and the moving speed of the cell is greater than the moving speed of the terminal device in the cell, the terminal device at the edge of the cell will perform mobility switching again, and the terminal device at the edge of the PCI collision cell will perform two consecutive switches in a short period of time, resulting in large signaling overhead and terminal power consumption.

[0094] In view of this, an embodiment of the present application provides a communication method and a communication device, which cancels the first switching of a terminal device at the edge of a PCI collision cell by setting a decision condition, thereby reducing signaling overhead and terminal power consumption.

[0095] Combine the following Figure 2a , Figure 2b , Figure 2c The application scenarios of the embodiments of the present application are illustrated by examples.

[0096] Figure 2a FIG. 1 shows a schematic diagram of a satellite communication system in a transparent transmission scenario. Figure 2a As shown, the terminal device can access the network through the air interface (the air interface can be various types of air interfaces, such as 5G air interfaces, etc.), and the network equipment (such as base stations) can be deployed on the ground and connected to the ground station that communicates with the satellite; the satellite can be connected to the ground station through a wireless link; the ground station and the base station can be connected to the core network through a wired or wireless link. Satellites can communicate with each other through wireless links. Figure 2a In the system shown, the satellite only has the transparent transmission and forwarding function (that is, the corresponding network equipment is deployed on the ground), and only transparent transmission and forwarding are realized between satellites.

[0097] Figure 2b , Figure 2c FIG. 1 shows a schematic diagram of a satellite communication system in a regeneration scenario. Figure 2bAs shown, the terminal device can access the network through the air interface (the air interface can be various types of air interfaces, such as 5G air interfaces, etc.), and the network equipment (such as base stations) can be deployed on the satellite (such as the regeneration mode of the satellite), for example, the base station or part of the base station function is deployed on the satellite; the satellites can complete the signaling interaction between the base stations and the user data transmission, such as Figure 2c shown.

[0098] For example, Figure 2a to Figure 2c The various network elements and their interfaces are described as follows:

[0099] Terminal devices include mobile devices that support the new radio (NR), such as mobile phones, tablets and other mobile devices. Terminal devices can access the satellite network through the air interface and initiate calls, surf the Internet and other services.

[0100] The base station is used to provide wireless access services, schedule wireless resources to access terminal devices, and provide reliable wireless transmission protocols and data encryption protocols.

[0101] The ground station is responsible for forwarding signaling and business data between the satellite and the core network.

[0102] The core network is used for user access control, mobility management, session management, user security authentication or billing, etc. The core network can be composed of multiple functional units, such as functional entities including the control plane and the data plane. Figure 2a to Figure 2c The core network shown may include access and mobility management function (AMF), session management function (SMF) and user plane function (UPF), etc. For example, AMF may be responsible for user access management, security authentication, and mobility management, etc.; UPF may be responsible for managing the transmission of user plane data, traffic statistics, etc.

[0103] Figure 2a to Figure 2c The air interface shown can be understood as the wireless link between the terminal and the base station, or the wireless link between the satellite and the ground station; the Xn interface can be understood as the interface between base stations, which is mainly used for signaling interactions such as switching; the NG interface can be used as the interface between the base station and the core network, for signaling such as the non-access stratum (NAS) of the core network, as well as user business data.

[0104] Optionally, the technical solution provided in the embodiment of the present application can be applied to a 5G mobile communication system, and can also be applied to a fourth generation (4G) mobile communication system, which is not specifically limited here. Figure 2a to Figure 2c The Xn interface shown is an X2 interface, and the NG interface is an S1 interface.

[0105] Optionally, the technical solution provided in the embodiment of the present application is not limited to the LEO NTN communication system, but can also be applied to NTN communication systems in other high-altitude orbits, such as a medium earth orbit (MEO) NTN communication system and a high earth orbit (HEO) NTN communication system.

[0106] Figure 3 A schematic diagram of a communication method provided by an embodiment of the present application. Figure 3 As shown, the method may include S310 to S320.

[0107] In some implementations, the method of this embodiment may be performed by a terminal device, or may be performed by a chip system, a hardware circuit, and / or a software module applied to the terminal device. The terminal device in the subsequent content of this embodiment may optionally be replaced by a chip system, a hardware circuit, and / or a software module in the terminal device.

[0108] In some implementations, the method of this embodiment may be performed by a network device, or may be performed by a chip system, a hardware circuit, and / or a software module applied to the network device. The network device in the subsequent content of this embodiment may optionally be replaced by a chip system, a hardware circuit, and / or a software module in the network device.

[0109] In the satellite transparent transmission scenario, the network device may be a base station deployed on the ground; in the satellite regeneration scenario, the network device may be a satellite.

[0110] S310, obtaining first configuration information, where the first configuration information is used to instruct a terminal device to perform a first switch, where the first switch is used to avoid a PCI collision.

[0111] As an example, when the network device predicts that a PCI collision is about to occur between a first cell of a first satellite and an adjacent second cell, the network device sends a first configuration message to all terminal devices in the first cell to instruct the terminal devices in the cell to execute a switching process to avoid the PCI collision, i.e., the first switching.

[0112] Optionally, the first configuration information includes information related to the new PCI value (PCI value), such as PCI, and PSS / SSS sequence, physical uplink shared channel (physical uplink shared channel, PUSCH) demodulation reference signal (de-modulation reference signal, DMRS) sequence, physical uplink control channel (physical uplink control channel, PUCCH) DMRS sequence, sounding reference signal (sounding reference signal, SRS) sequence, physical broadcast channel (physical broadcast channel, PBCH) DMRS sequence, etc. The first configuration information may also include the effective time Tw of the first configuration information, which can be understood as the time when the terminal device performs the first switch.

[0113] In a possible implementation, the first configuration information may be a cell-level broadcast message. As an example, before a PCI collision occurs, the network device may configure two different cell reselection configurations for a terminal device in a non-connected state in a system message, including a cell reselection configuration before the first cell changes the PCI and a cell reselection configuration after the first cell changes the PCI. The cell reselection configuration includes information contained in the first configuration information such as the PCI value of the cell.

[0114] Optionally, the first configuration information may be delivered via a system information block (SIB), for example, broadcasted via SIB2 to SIB4.

[0115] In a possible implementation, the first configuration information may be a UE-level radio resource control reconfiguration (RRC-reconfiguration) signaling. As an example, when a PCI collision occurs, the network device may configure the configuration of the target cell to all connected (RRC-connected) terminal devices in the first cell through RRC-reconfiguration signaling. The target cell refers to the first cell after the PCI is updated.

[0116] Optionally, the configuration of the target cell may be an NR measurement switching configuration, including a measurement object, a measurement report configuration, etc. The measurement object may include multiple target cells, and the measurement report configuration may include an event-triggered measurement report configuration, a periodic measurement report configuration, or a report cell global identifier (reportCGI) type measurement report configuration.

[0117] Optionally, the configuration of the target cell may be a conditional handover (CHO) handover configuration, including the configuration of CHO candidate cells and CHO execution conditions, etc. The CHO execution conditions include a CHO condition based on time triggering or a CHO condition based on location triggering.

[0118] In a possible implementation, the first configuration information may be sent in the form of multicast or a combination of broadcast and unicast. As an example, the network device may indicate part of the configuration of the first switching to each terminal device in the first cell through a broadcast message, such as a measurement frequency, a measurement object, an SSB measurement timing configuration (SSB measurement timing configuration, SMTC), etc., and send the remaining configuration of the first switching to each terminal device through RRC signaling.

[0119] In this embodiment, after receiving the first configuration information, the terminal device may perform the first switching when the effective time Tw indicated by the first configuration information is reached, thereby avoiding PCI collision.

[0120] Optionally, if the method is executed by a terminal device, the terminal device may receive the first configuration information from the network device; correspondingly, the network device may send the first configuration information to the terminal device.

[0121] Optionally, if the method is executed by a network device, then after acquiring the first configuration information, the network device may send the first configuration information to the terminal device; correspondingly, the terminal device receives the first configuration information.

[0122] S320: Obtain second configuration information, where the second configuration information is used to instruct the terminal device to cancel the first switching.

[0123] In this embodiment, before the terminal device executes the first switching, it can be determined according to the judgment condition whether the terminal device cancels the execution of the first switching. If the execution of the first switching is canceled, it is indicated by the second configuration information.

[0124] Optionally, the decision conditions may be configured in advance in the terminal device or the network device to facilitate calling and improve efficiency.

[0125] In a possible implementation, the first handover may be canceled when the following judgment condition is met: the time difference between a first moment of performing the first handover and a second moment of performing the mobility handover is less than or equal to a first time threshold.

[0126] In this implementation, the first moment may be the effective time Tw in the first configuration information; the second moment may be the time T1 in the third configuration information used to instruct the terminal device to perform mobility switching, and the third configuration information is used to instruct the terminal device to perform mobility switching.

[0127] Among them, PCI collision can be predicted, so Tw can be determined according to the time when PCI collision occurs. As an example, Tw can be the time when PCI collision occurs, or the time when the fourth time threshold is satisfied between the time when PCI collision occurs, which is not specifically limited in this application.

[0128] Optionally, the third configuration information may be NR measurement switching configuration, including measurement object, measurement report configuration, etc.

[0129] Optionally, the terminal device may obtain the third configuration information from the network device. After receiving the third configuration information, the terminal device may measure the measurement object according to the third configuration information and report the measurement report to the network device; after receiving the measurement report, the network device determines whether there is a suitable target cell, and if there is a suitable target cell, instructs the terminal device to perform mobility switching at time T1, so that the terminal device switches to the target cell at time T1.

[0130] In one possible implementation, the execution of the first switch can also be canceled when the following judgment conditions are met: the time length of the overlapping area between the first time window for executing the first switch and the second time window for executing the mobility switch is less than or equal to the second time threshold, or the time difference between the start time of the first time window and the start time of the second time window is less than or equal to the third time threshold.

[0131] In this implementation, the first configuration information and the third configuration information may both be CHO configurations, and the CHO execution conditions in the CHO configurations may be CHO conditions based on time triggering.

[0132] In this implementation, the first time window may be a time period in the first configuration information indicating that the terminal device performs the first switching, and the second time window may be a time period in the third configuration information indicating that the terminal device performs the mobility switching.

[0133] In this embodiment, the first time threshold, the second time threshold, the third time threshold and the fourth time threshold can be set according to actual needs, and this application does not impose any specific restrictions on this.

[0134] In this embodiment, optionally, if the method is executed by a network device, the network device may send second configuration information to the terminal device; accordingly, the terminal device receives the second configuration information from the network device and cancels the first switching.

[0135] Optionally, the second configuration information may be carried in at least one of the following messages: RRC signaling, media access control element (MAC CE) signaling, downlink control information (DCI), and multicast message.

[0136] Optionally, the network device may send the second configuration information only to terminal devices that do not meet the judgment condition.

[0137] In this embodiment, if the method is executed by a network device, the first switching can also be canceled when the following judgment conditions are met: the terminal device is located at the edge of the first mobile cell, the first mobile cell is the service cell of the terminal device, the PCI of the first mobile cell is the same as the PCI of the second mobile cell, and the second mobile cell is a cell adjacent to the first mobile cell in the moving direction of the terminal device.

[0138] The first mobile cell may be a cell under the first satellite, and the second mobile cell may be a cell under the second satellite.

[0139] Optionally, the terminal device may be considered to be located at the edge of the first mobile cell when the following conditions are met: the difference between the distance between the location of the terminal device and the center point of the first mobile cell and the radius of the first mobile cell is less than or equal to a distance threshold. The distance threshold may be set according to actual needs, and this application does not make specific limitations on this.

[0140] Optionally, the terminal device may also consider that the terminal device is located at the edge of the first mobile cell when the following conditions are met: if the SSB reference signal receiving power (RSRP) of the first mobile cell measured and reported by the terminal device is less than or equal to a threshold value. The threshold value can be set according to actual needs, and this application does not make specific restrictions on this.

[0141] Optionally, the network device may determine whether the terminal device is at the edge of the first mobile cell and determine the running trajectory of the terminal device according to the global navigation satellite system (GNSS) position information, ephemeris information and cell topology information of the terminal device.

[0142] Optionally, if the method is executed by a terminal device, the terminal device may send second configuration information to the network device; accordingly, the network device receives the second configuration information from the terminal device and cancels the network resources reserved by the network device for the terminal device to perform the first switching.

[0143] Optionally, the second configuration information may be carried in at least one of the following messages: PUSCH, PUCCH.

[0144] Optionally, the length of the second configuration information may be 1 bit. For example, when the value of the second configuration information is "0", it indicates that the terminal device cancels the first switching, or when the value of the second configuration information is "1", it indicates that the terminal device cancels the first switching.

[0145] In this embodiment, by canceling the execution of the first switching, the number of switching times of the terminal device can be reduced, thereby reducing the complexity, signaling loss and loss of the terminal device.

[0146] Figure 4 A schematic diagram of a communication method provided by another embodiment of the present application is shown below. Figure 4 As shown, the method may include S410 to S450.

[0147] In this embodiment, the method can be executed by a network device, and can also be executed by a chip system, a hardware circuit and / or a software module applied to the network device. This application is uniformly described in terms of the network device.

[0148] Among them, in the satellite transparent transmission scenario, the network device can be a base station deployed on the ground; in the satellite regeneration scenario, the network device can be a satellite.

[0149] S410, determining a PCI collision cell.

[0150] As an example, the network device may determine the first cell under the satellite that has a PCI collision with the neighboring satellite cell based on the satellite and cell topology information. The cell topology information may include relative movement and position relationship of the cell topology, and the neighboring satellite cell may be understood as a cell adjacent to the first cell under other satellites.

[0151] It should be noted that this embodiment does not limit the specific implementation method for determining the PCI collision cell.

[0152] S420, sending first configuration information, where the first configuration information is used to instruct the terminal device to perform a first switch, and the first switch is used to avoid PCI collision.

[0153] In this embodiment, when the network device predicts that a PCI collision is about to occur between the first cell of the first satellite and the adjacent second cell, the network device sends a first configuration message to all terminal devices in the first cell, instructing the terminal devices in the cell to execute a switching process for avoiding the PCI collision, i.e., the first switching. Accordingly, the terminal device receives the first configuration message. The specific implementation of S420 can be found in the detailed description of S310, which will not be repeated here.

[0154] As an example, the first configuration information may be a CHO switching configuration, and the CHO switching configuration is a CHO execution condition based on time triggering. For example, the execution condition is condEventT1, and condEventT1 includes a time window [t1, t2] for executing the first switching.

[0155] After the network device sends the first configuration information to the terminal device, the network device reserves network resources for the terminal device to perform the first switching in the time window [t1, t2]; after receiving the first configuration information, the terminal device performs the first switching within the time window [t1, t2] indicated by the first configuration information, thereby switching to the first cell after the PCI is updated.

[0156] S430: Send third configuration information, where the third configuration information is used to instruct the terminal device to perform mobility switching.

[0157] In this embodiment, the network device can determine whether the terminal device needs to perform mobility switching by the RSRP of the cell providing network services to the terminal device reported by the terminal device. If the RSRP of the cell is less than or equal to the threshold, the network device sends the third configuration information to the terminal device in the connected state in the cell to instruct the terminal device to perform mobility switching; accordingly, the terminal device receives the third configuration information. The threshold value can be set according to actual needs and is not specifically limited here.

[0158] Optionally, the third configuration information may be RRC-reconfiguration signaling at the UE level.

[0159] As an example, the third configuration information may be NR measurement switching configuration, including measurement object, measurement report configuration, etc.

[0160] In this example, optionally, the specific configuration of the measurement report in the third configuration information can be set according to the target cell to which the network device is ready to instruct the terminal device to switch.

[0161] For example, Figure 5 A schematic diagram of a switching scenario provided by an embodiment of the present application. Figure 5 As shown, if the network device is ready to instruct the terminal device (such as UE1) to switch mobility from the first mobile cell to the second mobile cell, and the second mobile cell has the same frequency and PCI as the first mobile cell, the third configuration information may include a measurement report configuration of the reportCGI type. The first mobile cell is the service cell of the terminal device, and the second mobile cell is a cell adjacent to the first mobile cell in the moving direction of the terminal device. It should be understood that when the first mobile cell and the second mobile cell have the same frequency and PCI, the first mobile cell and the second mobile cell are cells under different satellites.

[0162] Among them, after receiving the third configuration information, the terminal device can report the CGI of the first mobile cell and the second mobile cell to the network device, so that the network device can distinguish the first mobile cell and the second mobile cell, and can instruct the terminal device to switch to the second mobile cell according to the CGI.

[0163] Optionally, after receiving the third configuration information, the terminal device may also report the RSRP of the first mobile cell and the second mobile cell to the network device.

[0164] like Figure 5 As shown, if the network device is ready to instruct the terminal device (such as UE2) to switch mobility from the first mobile cell to the third mobile cell, and the PCI of the third mobile cell is different from the PCI of the first mobile cell, the third configuration information may include an eventTriggered type measurement report configuration or a periodical type measurement report configuration. The first mobile cell is the service cell of the terminal device, and the third mobile cell is a cell adjacent to the first mobile cell in the moving direction of the terminal device.

[0165] Optionally, when the PCIs of the first mobile cell and the third mobile cell are different, the first mobile cell and the second mobile cell may be cells under the same satellite or cells under different satellites, which is not specifically limited here.

[0166] After receiving the third configuration information, the terminal device reports the PCI and RSRP of the first mobile cell and the second mobile cell to the network device, and the network device instructs the terminal device to switch to the second mobile cell based on the PCI reported by the terminal device.

[0167] As an example, the third configuration information may be CHO switching configuration, including configuration of CHO candidate cells and CHO execution conditions, etc.

[0168] For example, if the third configuration information may be a time-triggered CHO configuration, and the CHO switching configuration is a time-triggered CHO execution condition condEventT1, condEventT1 includes a time window [t3, t4] for the terminal device to perform mobility switching.

[0169] In this example, after the network device sends the third configuration information to the terminal device, the network device reserves network resources for the terminal device to perform mobility switching in the time window [t3, t4]; after receiving the third configuration information, the terminal device performs mobility switching within the time window [t3, t4] indicated by the third configuration information, thereby switching to the target cell indicated by the network device.

[0170] In this embodiment, the execution process of S420 and S430 is not in particular order, and S420 may be executed first and then S430, or S430 may be executed first and then S420.

[0171] S440, determining whether the terminal device cancels the first switching.

[0172] In this embodiment, the network device can determine whether the terminal device cancels the first switching according to the judgment condition. The specific implementation method of S430 can refer to the relevant details in S320 and will not be repeated here.

[0173] As an example, the first configuration information and the third configuration information may both be time-triggered CHO switching configurations, wherein the first configuration information includes a time window [t1, t2] configured for the terminal device to perform the first switching, and the third configuration information includes a time window [t3, t4] configured for the terminal device to perform the mobility switching.

[0174] Optionally, the network device can determine whether the time length of the overlapping area between the first time window and the second time window is less than or equal to a second time threshold. If the time length of the overlapping area is less than or equal to the second time threshold, the terminal device cancels the first switch; if the time length of the overlapping area is greater than the second time threshold, the terminal device executes the first switch within the first time window.

[0175] Optionally, the network device may also determine whether the time difference between the start time of the first time window and the start time of the second time window is less than or equal to a third time threshold. If the time difference between the start time of the first time window and the start time of the second time window is less than or equal to the third time threshold, the terminal device cancels the first switch; if the time difference between the start time of the first time window and the start time of the second time window is greater than the third time threshold, the terminal device performs the first switch within the first time window.

[0176] S450: Send second configuration information, where the second configuration information is used to instruct the terminal device to cancel the first switching.

[0177] In this embodiment, after the network device confirms that the terminal device cancels the execution of the first switch according to the judgment condition, the network device can send second configuration information to the terminal device to instruct the terminal device to cancel the execution of the first switch. At the same time, the network device releases the network resources reserved for the terminal device to execute the first switch, thereby saving resources; accordingly, the terminal device receives the second configuration information, and after receiving the second configuration information, the terminal device cancels the execution of the first switch and only executes the mobility switch, thereby reducing the number of switching times of the terminal device and reducing the signaling overhead and the loss of the terminal device.

[0178] Figure 6 A schematic diagram of a communication method provided in yet another embodiment of the present application. Figure 6 As shown, the method may include S610 to S650.

[0179] In this embodiment, the method can be executed by a terminal device, and can also be executed by a chip system, a hardware circuit and / or a software module applied to the terminal device. This application is uniformly described with reference to the terminal device.

[0180] S610, receiving first configuration information, where the first configuration information is used to instruct a terminal device to perform a first switch, where the first switch is used to avoid a PCI collision.

[0181] In this embodiment, the terminal device may receive the first configuration information sent by the network device.

[0182] For the specific content of the first configuration information in S610, reference may be made to the relevant detailed description in S310 or S420, which will not be repeated here.

[0183] S620: Receive third configuration information, where the third configuration information is used to instruct the terminal device to perform mobility switching.

[0184] In this embodiment, the terminal device may receive the third configuration information sent by the network device.

[0185] The specific content of the third configuration information in S620 can be found in the relevant detailed description in S430, which will not be repeated here.

[0186] In this embodiment, the execution process of S610 and S620 is not in particular order, and S610 may be executed first and then S620, or S620 may be executed first and then S610.

[0187] S630, determining whether the terminal device cancels the first switching.

[0188] In this embodiment, the terminal device may determine whether the terminal device cancels the first switching according to the determination condition.

[0189] Among them, the specific implementation method of the terminal device judging whether it is necessary to cancel the first switching according to the judgment condition can be referred to the relevant details in S320 or S440, which will not be repeated here.

[0190] S640: Send second configuration information, where the second configuration information is used to instruct the terminal device to cancel the first switching.

[0191] In this embodiment, after the terminal device confirms the cancellation of the first switch according to the judgment condition, the terminal device can send second configuration information to the network device to instruct the terminal device to cancel the execution of the first switch. At the same time, the terminal device cancels the execution of the first switch, thereby reducing the signaling overhead and the loss of the terminal device; accordingly, the network device receives the second configuration information, and after receiving the second configuration information, the network device releases the network resources reserved for the terminal device for executing the first switch, thereby saving resources and improving resource utilization.

[0192] S650: Execute switching.

[0193] In this embodiment, if the first handover is canceled, the terminal device only needs to perform mobility handover; if the first handover is not canceled, the terminal device performs the first handover and mobility handover.

[0194] In one possible implementation, the terminal device confirms the cancellation of the first switch based on the judgment conditions and sends second configuration information to the network device. After receiving the second configuration information, the network device can reconfirm whether the terminal device can cancel the first switch based on factors such as the network system load.

[0195] In this implementation, if the network device confirms that the terminal device can cancel the first switch, the network device can send fourth configuration information to the terminal device to indicate that the terminal device can cancel the first switch; accordingly, the terminal device receives the fourth configuration information and cancels the first switch.

[0196] In this implementation, if the network device confirms that the terminal device cannot cancel the first switch, the network device can send fourth configuration information to the terminal device to instruct the terminal device to forcibly execute the first switch; accordingly, the terminal device receives the fourth configuration information and executes the first switch according to the first configuration information.

[0197] Optionally, the length of the fourth configuration information may be 1 bit. For example, when the value of the fourth configuration information is "0", it indicates that the terminal device cancels the first switching, and when the value of the fourth configuration information is "1", it indicates that the terminal device performs the first switching. For another example, when the value of the fourth configuration information is "1", it indicates that the terminal device cancels the first switching, and when the value of the fourth configuration information is "0", it indicates that the terminal device performs the first switching.

[0198] Optionally, the fourth configuration information may be carried in at least one of the following messages: RRC signaling, MAC CE signaling, DCI field indication, and multicast message.

[0199] Optionally, the fourth configuration information can be carried in the first configuration information. As an example, when the first configuration information is sent down through the SIB, the fourth configuration information can be a newly introduced field in the first configuration information and configured separately in the SIB message. For example, the configuration mode of the fourth configuration information in the SIB can be two value states of "enabled" and "disabled". In the "enabled" state, the terminal device needs to execute the first switch, and in the "disabled" state, the terminal device can cancel the execution of the first switch.

[0200] Optionally, when the first configuration information is a CHO switching configuration, the fourth configuration information may be carried in the CHO execution condition to implicitly instruct the terminal device to perform the first switching. For example, when the CHO execution condition is a CHO condition based on time triggering, when the length of the time window for performing the first switching is greater than or equal to the fifth time threshold, the terminal device performs the first switching. The fifth time threshold may be set according to actual conditions, and this application does not specifically limit this.

[0201] In a possible implementation, the network device and the terminal device may simultaneously determine, based on a determination condition, whether the terminal device cancels the first switching.

[0202] In this implementation, if the network device determines that the terminal device needs to perform the first switching according to factors such as the network system load, the fourth configuration information can be sent to the terminal device to instruct the terminal device to forcibly perform the first switching. Accordingly, the terminal device performs the first switching after receiving the fourth configuration information and stops performing S630 and S640.

[0203] Figure 7 A schematic diagram of the structure of a communication device provided in one embodiment of the present application. Figure 7 The device 700 shown can be used to implement Figure 3 , Figure 4 or Figure 6 The steps performed by the terminal device or network device in Figure 7 As shown, the device 700 of this embodiment may include: an acquisition module 710 , a sending module 720 and a processing module 730 .

[0204] The device 700 is used to implement Figure 3 In the method shown, the acquisition module 710 can be used to implement S310 and S320.

[0205] The device 700 is used to implement Figure 4 When the method is shown, the acquisition module 710 can be used to implement the operations performed by the terminal device in S420, S430 and S450, the sending module 720 can be used to implement the operations performed by the network device in S420, S430 and S450; the processing module 730 can be used to implement S410 and S440.

[0206] The device 700 is used to implement Figure 6 When the method is shown, the acquisition module 710 can be used to implement the operations performed by the terminal device in S610 and S620, and the acquisition module 710 is also used to implement the operations performed by the network device in S640. The sending module 720 can be used to implement the operations performed by the network device in S610 and S620, and the sending module 720 can also be used to implement the operations performed by the terminal device in S640; the processing module 730 can be used to implement S630 and S650.

[0207] Figure 8 A schematic diagram of the structure of a communication device provided in yet another embodiment of the present application. Figure 8 The apparatus shown can be used to implement the method executed by a terminal device or a network device in any of the aforementioned embodiments.

[0208] like Figure 8 As shown, the device 800 of this embodiment includes: a memory 810, a processor 820, a communication interface 830 and a bus 840. The memory 810, the processor 820 and the communication interface 830 are connected to each other through the bus 840.

[0209] The memory 810 may be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 810 may store a program. When the program stored in the memory 810 is executed by the processor 820, the processor 820 is used to execute the program. Figure 3 , Figure 4 or Figure 6 The method shown includes steps performed by a terminal device or a network device.

[0210] The processor 820 can adopt a general central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits to execute relevant programs to implement the method in the method embodiment of the present application.

[0211] The processor 820 may also be an integrated circuit chip with signal processing capability. In the implementation process, each step in the embodiment of the present application may be completed by an integrated logic circuit of hardware in the processor 820 or by instructions in the form of software.

[0212] The processor 820 may also be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0213] The steps of the method disclosed in the embodiment of the present application can be directly embodied as being executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 810, and the processor 820 reads the information in the memory 810 and completes the functions required to be executed by the modules included in the communication device of the present application in combination with its hardware. For example, it can execute Figure 3 , Figure 4 or Figure 6 The various steps / functions in the method shown are executed by a terminal device or a network device.

[0214] Optionally, the memory 810 and the processor 820 may be integrated together.

[0215] The communication interface 830 may use, but is not limited to, a transceiver or other transceiver device to implement communication between the apparatus 800 and other devices or a communication network.

[0216] The bus 840 may include a path for transmitting information between the various components of the device 800 (eg, the memory 810 , the processor 820 , and the communication interface 830 ).

[0217] It should be noted that the modules or components shown in the above embodiments may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASICs), or one or more microprocessors (DSPs), or one or more field programmable gate arrays (FPGAs). For another example, when a module above is implemented in the form of a processing element calling a program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call program codes, such as a controller. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0218] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, software module or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, a data center, etc. that contains one or more available media integrated. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk Solid State Disk (SSD)), etc.

[0219] The term "plurality" in this article refers to two or more than two. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship; in the formula, the character " / " indicates that the previous and next associated objects are in a "division" relationship. In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0220] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0221] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean 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 the present application.

Claims

1. A communication method, It is characterized in that The method comprises: Acquire first configuration information, where the first configuration information is used to instruct the terminal device to perform a first handover, where the first handover is used to avoid a physical cell identifier PCI collision; Acquire second configuration information, where the second configuration information is used to instruct the terminal device to cancel the first switching.

2. The method according to claim 1, It is characterized in that The terminal device is located at the edge of a first mobile cell, which is the service cell of the terminal device. The PCI of the first mobile cell is the same as the PCI of the second mobile cell, and the second mobile cell is a cell adjacent to the first mobile cell in the moving direction of the terminal device.

3. The method according to claim 1 or 2, It is characterized in that The method further comprises: Acquire third configuration information, where the third configuration information includes a measurement report configuration of a report global cell identity reportCGI type.

4. The method according to claim 1, It is characterized in that The method further comprises: Acquire third configuration information, where the third configuration information is used to instruct the terminal device to perform mobility switching; The first configuration information includes a first time for performing the first switching, the third configuration information includes a second time for performing the mobility switching, and a time difference between the first time and the second time is less than or equal to a first time threshold; or The first configuration information includes a first time window for performing the first switching, and the third configuration information includes a second time window for performing the mobility switching, the time length of the overlapping area of ​​the first time window and the second time window is less than or equal to a second time threshold, or the time difference between the starting time of the first time window and the starting time of the second time window is less than or equal to a third time threshold.

5. The method according to any one of claims 1 to 4, It is characterized in that The second configuration information is carried in at least one of the following messages: radio resource control RRC signaling, control layer control element MAC CE signaling, downlink control information DCI, and multicast message; or, The second configuration information is carried in at least one of the following messages: a physical uplink shared channel PUSCH and a physical uplink control channel PUCCH.

6. The method according to any one of claims 1 to 5, It is characterized in that The length of the second configuration information is 1 bit.

7. The method according to any one of claims 1 to 6, It is characterized in that The method further comprises: sending the first configuration information; The acquiring of the second configuration information includes: receiving the second configuration information.

8. The method according to any one of claims 1 to 6, It is characterized in that The method further comprises: Sending the first configuration information; Send the second configuration information.

9. The method according to any one of claims 1 to 6, It is characterized in that The obtaining of the first configuration information comprises: receiving the first configuration information; Furthermore, the method further includes: sending the second configuration information.

10. The method according to any one of claims 1 to 6, It is characterized in that The obtaining of the first configuration information comprises: receiving the first configuration information; The acquiring the second configuration information includes: receiving the second configuration information.

11. A communication device, It is characterized in that include: An acquisition module, used to acquire first configuration information, where the first configuration information is used to instruct the terminal device to perform a first handover, where the first handover is used to avoid a physical cell identifier PCI collision; The acquisition module is further used to acquire second configuration information, where the second configuration information is used to instruct the terminal device to cancel the first switching.

12. The device according to claim 11, It is characterized in that The terminal device is located at the edge of a first mobile cell, which is the service cell of the terminal device. The PCI of the first mobile cell is the same as the PCI of the second mobile cell, and the second mobile cell is a cell adjacent to the first mobile cell in the moving direction of the terminal device.

13. The device according to claim 11 or 12, It is characterized in that The acquisition module is also used for: Acquire third configuration information, where the third configuration information includes a measurement report configuration of a report global cell identity reportCGI type.

14. The device according to claim 11, It is characterized in that The acquisition module is also used for: Acquire third configuration information, where the third configuration information is used to instruct the terminal device to perform mobility switching; The first configuration information includes a first time for performing the first switching, the third configuration information includes a second time for performing the mobility switching, and a time difference between the first time and the second time is less than or equal to a first time threshold; or The first configuration information includes a first time window for performing the first switching, and the third configuration information includes a second time window for performing the mobility switching, the time length of the overlapping area of ​​the first time window and the second time window is less than or equal to a second time threshold, or the time difference between the starting time of the first time window and the starting time of the second time window is less than or equal to a third time threshold.

15. The device according to any one of claims 11 to 14, It is characterized in that The second configuration information is carried in at least one of the following messages: radio resource control RRC signaling, control layer control element MAC CE signaling, downlink control information DCI, and multicast message; or, The second configuration information is carried in at least one of the following messages: a physical uplink shared channel PUSCH and a physical uplink control channel PUCCH.

16. The device according to any one of claims 11 to 15, It is characterized in that The length of the second configuration information is 1 bit.

17. The device according to any one of claims 11 to 16, It is characterized in that The device further includes a sending module, and the sending module is used to send the first configuration information; The acquisition module is specifically used to: receive the second configuration information.

18. The device according to any one of claims 11 to 16, It is characterized in that The device further includes a sending module, and the sending module is used to send the first configuration information; The sending module is further used to send the second configuration information.

19. The device according to any one of claims 11 to 16, It is characterized in that The acquisition module is specifically used to: receive the first configuration information; Furthermore, the device further includes a sending module, and the sending module is used to send the second configuration information.

20. The device according to any one of claims 11 to 16, It is characterized in that The acquisition module is specifically used to: receive the first configuration information; The acquisition module is specifically used to: receive the second configuration information.

21. A communication device, It is characterized in that include: A processor, wherein the processor is coupled to a memory, wherein the memory is used to store a computer program, and when the processor calls the computer program, the device is caused to execute the method according to any one of claims 1 to 10.

22. A communication system, It is characterized in that A communication device comprising means for performing the method as claimed in any one of claims 1 to 10.

23. A computer program product, It is characterized in that The method comprises a computer program code, which, when executed on a computer, causes the computer to implement the method according to any one of claims 1 to 10.

24. A computer readable medium, It is characterized in that The computer-readable medium stores a program code for computer execution, the program code including instructions for executing the method according to any one of claims 1 to 10.

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