Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus. The technical solution provided in the present application comprises: acquiring first configuration information, wherein the first configuration information is used for instructing a terminal device to execute first switching, and the first switching is used for avoiding a PCI collision; and acquiring second configuration information, wherein the second configuration information is used for instructing the terminal device to cancel the execution of the first switching. In the technical solution provided in the present application, by means of canceling the execution of first switching by a terminal device, the number of times of switching of the terminal device can be reduced, such that the complexity, signaling loss and power consumption of the terminal device can be reduced.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on June 16, 2023, with application number 202310724404.4 and application name “A Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of wireless communication technology, and in particular to a communication method and a communication device. Background Art

[0003] In non-terrestrial network (NTN) technology, such as low Earth orbit (LEO) NTN communication systems, the pitch and azimuth angles of a satellite's beam may not change as the satellite moves, so that the projection topology of the satellite beam on the ground moves at the same speed as the satellite moves. As a result, the topology of the satellite cell composed of the satellite beam on the ground also moves in the direction of satellite movement. Such a cell can be called an earth moving cell.

[0004] When LEO NTN provides communication services to terminal devices through terrestrial mobile cells, problems such as high signaling overhead and terminal power consumption will occur.

[0005] Summary of the Invention

[0006] 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-terrestrial communication network.

[0007] In a first aspect, the present application provides a communication method, including: obtaining first configuration information, the first configuration information being used to instruct a terminal device to perform a first switch, the first switch being used to avoid a physical cell identifier PCI collision; and obtaining second configuration information, the second configuration information being used to instruct the terminal device to cancel the execution of the first switch.

[0008] 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.

[0009] 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.

[0010] As an example, two or more cells in which the PCI collision occurs belong to different satellites.

[0011] As an example, avoiding PCI collision may be understood as preventing the PCIs of cells where PCI collision occurs from colliding again.

[0012] Optionally, the first configuration information may be UE-level radio resource control reconfiguration (RRC-reconfiguration) signaling.

[0013] 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.

[0014] As another example, the first configuration information may be a conditional handover (CHO) configuration, including configuration of CHO candidate cells and CHO execution conditions, etc.

[0015] Optionally, when a first cell of a first satellite provides communication services to a terminal device, the network device may predict a PCI collision between the first cell and an adjacent cell, and may therefore send first configuration information to the terminal device to avoid the PCI collision. Accordingly, the terminal device may receive the first configuration information and perform a first handover based on the first configuration information. Before the terminal device performs the first handover, a judgment condition may be used to determine whether the terminal device needs to cancel the first handover. If the terminal device cancels the first handover, a second configuration information may be provided to indicate this.

[0016] In this technical solution, 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 power consumption of the terminal device.

[0017] 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.

[0018] 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.

[0019] Optionally, a terminal device may be considered to be located at the edge of the first mobile cell if the following condition is met: the difference between the distance from the terminal device's location 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 can be set based on actual needs and is not specifically limited here.

[0020] Optionally, the terminal device may also consider that the terminal device is located at the edge of the first mobile cell when the following condition is met: if the synchronization signal block (synchronization signal / PBCH block, 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 is not specifically limited here.

[0021] This implementation provides a decision condition, and if 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, the terminal device is moving from the first mobile cell to the second mobile cell, and the PCI of the first mobile cell and the second mobile cell are the same.

[0022] 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.

[0023] In this implementation, the terminal device may obtain third configuration information from the network device, 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.

[0024] In some exemplary scenarios, when a low Earth orbit (LEO) non-terrestrial communication network (NTN) provides communication services to a terminal device through a ground mobile cell, the first cell providing communication services to the terminal device is always in motion, and the moving speed of the cell is generally 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 not be able 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.

[0025] In the above scenario, the third configuration information may be a measurement report configuration including a report cell global identifier (reportCGI) type. The terminal device may report the CGI of the first cell and the second cell based on the third configuration information, so that the network device can distinguish between the first cell and the second cell and instruct the terminal device to perform mobility switching from the first cell to the second cell.

[0026] In combination with the first aspect, in some implementations of the first aspect, the method further 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.

[0027] 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.

[0028] Optionally, the third configuration information may be UE-level RRC-reconfiguration signaling.

[0029] As an example, the third configuration information may be NR measurement switching configuration, including measurement object, measurement report configuration, etc.

[0030] 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, it instructs the terminal device to perform mobility switching at time T1, so that the terminal device switches to the target cell at time T1.

[0031] It should be noted that in this implementation, the first handover is predictable, and therefore the first time to execute the first handover can be determined based on the time when the PCI collision occurs. As an example, the first time can be the time when the PCI collision occurs, or it can be the time when the fourth time threshold is satisfied between the time when the PCI collision occurs and the time when the PCI collision occurs, without specific limitation.

[0032] As another example, the first configuration information and the third configuration information may be CHO handover configurations, including configurations of CHO candidate cells and CHO execution conditions. The CHO execution conditions may be time-triggered CHO conditions. For example, if the first configuration information is a time-triggered CHO configuration, and the CHO execution condition is that the terminal device performs CHO handover of the target cell within the time window [t1, t2], then the first time window is [t1, t2], and the start time of the first time window is t1.

[0033] Optionally, 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 are not specifically limited here.

[0034] This implementation 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.

[0035] 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.

[0036] 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.

[0037] 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 the physical uplink shared channel (PUSCH) and the physical uplink control channel (PUCCH), and transmitted by the terminal device to the network device.

[0038] In combination with the first aspect, in some implementations of the first aspect, the length of the second configuration information is 1 bit.

[0039] As an example, when the value of the second configuration information is "0", it instructs the terminal device to cancel the execution of the first handover, or when the value of the second configuration information is "1", it instructs the terminal device to cancel the execution of the first handover.

[0040] In combination with the first aspect, in some implementations of the first aspect, the method further includes: sending the first configuration information; wherein, obtaining the second configuration information includes: receiving 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 the 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 execution of the first switch based on the judgment condition. If the first switch is canceled, the terminal device sends a second configuration message to the network device to instruct the terminal device to cancel the execution of the first switch, and the terminal device cancels the execution of 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 for executing the first switch, thereby saving resources.

[0042] 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.

[0043] In this implementation, the method can be executed by a network device, which can send first configuration information to a terminal device to instruct the terminal device to perform a first handover when a PCI collision occurs. After receiving the first configuration information, the terminal device performs the first handover at the first moment or within the first time window according to the instruction of the first configuration information. At the same time, the network device also determines whether the terminal device needs to cancel the first handover based on a judgment condition. If the first handover is to be canceled, the network device will send second configuration information to the terminal device to instruct the terminal device to cancel the first handover, and the network device will cancel the network resources reserved for the terminal device for performing the first handover. After receiving the second configuration information, the terminal device cancels the first handover, thereby reducing signaling overhead and terminal device losses.

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

[0045] In this implementation, the method can be executed by a terminal device, and the terminal device can receive the first configuration information sent by the 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 execution of the first switch based on the judgment condition; if the execution of the first switch is canceled, the terminal device sends a second configuration information to the network device to instruct the terminal device to cancel the execution of the first switch, and the terminal device cancels the execution of 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 executing the first switch, thereby saving resources.

[0046] 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.

[0047] 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 according to the instruction of the first configuration information, or performs the first switch in the first time window.

[0048] At the same time, the terminal device can also receive the second configuration information sent by the network device. The second configuration information is used to instruct the terminal device to cancel the first switching. After receiving the second configuration information, the terminal device cancels the first switching, thereby reducing signaling overhead and terminal device losses.

[0049] Optionally, the methods, steps or operations 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 with reference to the network device.

[0050] Optionally, the methods, steps or operations 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 with reference to the terminal device.

[0051] 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.

[0052] For example, the apparatus may include: an acquisition module. The acquisition module is configured to acquire first configuration information, where the first configuration information is configured to instruct a terminal device to perform a first handover, where the first handover is configured to avoid a physical cell identifier (PCI) collision; and the acquisition module is further configured to acquire second configuration information, where the second configuration information is configured to instruct the terminal device to cancel the first handover.

[0053] 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.

[0054] In combination with the second aspect, in some implementations of the second aspect, the acquisition module is further configured to acquire third configuration information, where the third configuration information includes a measurement report configuration of a report global cell identity reportCGI type.

[0055] In combination with the second aspect, in some implementations of the second aspect, the above-mentioned acquisition module is further used to obtain 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.

[0056] 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.

[0057] In combination with the second aspect, in some implementations of the second aspect, the length of the second configuration information is 1 bit.

[0058] 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.

[0059] In combination with the second aspect, in some implementations of the second aspect, the device may further include a sending module, which is further used to send the first configuration information; the sending module is further used to send the second configuration information.

[0060] 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 further includes a sending module, which is used to send the second configuration information.

[0061] 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.

[0062] Optionally, the apparatus may further include: a processing module configured to determine whether the terminal device cancels the first handover; determine a PCI collision cell; and execute handover, such as the first handover and mobility handover.

[0063] In a third aspect, the present application provides a communication device, comprising a processor, the processor being coupled to a memory and configured to call program code in the memory to execute the method described in the first aspect or any possible implementation thereof. Optionally, the device further comprises a memory. Optionally, the device further comprises a communication interface, the processor being coupled to the communication interface.

[0064] 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.

[0065] 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.

[0066] 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 thereof.

[0067] 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.

[0068] In a sixth aspect, the present application provides a computer-readable medium storing 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 thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] FIG1 is a schematic diagram of a PCI collision occurring in a single-satellite single-cell scenario according to an embodiment of the present application;

[0070] FIG2a is a schematic diagram of an application scenario provided by an embodiment of the present application;

[0071] FIG2 b is a schematic diagram of an application scenario provided by an embodiment of the present application;

[0072] FIG2c is a schematic diagram of an application scenario provided by an embodiment of the present application;

[0073] FIG3 is a schematic diagram of a communication method provided by an embodiment of the present application;

[0074] FIG4 is a schematic diagram of a communication method provided in yet another embodiment of the present application;

[0075] FIG5 is a schematic diagram of a switching scenario provided by an embodiment of the present application;

[0076] FIG6 is a schematic diagram of a communication method provided in yet another embodiment of the present application;

[0077] FIG7 is a schematic diagram of the structure of a communication device provided by an embodiment of the present application;

[0078] FIG8 is a schematic structural diagram of a communication device provided in yet another embodiment of the present application.

[0079] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0080] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0081] The non-terrestrial networks (NTN) project, initiated by the 3rd Generation Partnership Project (3GPP), is committed to integrating satellite communications with the fifth-generation (5G) mobile communication system, thereby realizing a satellite-ground fusion network that integrates satellite networks and terrestrial networks, and further achieving three-dimensional network coverage in natural spaces such as space, air, land, and ocean.

[0082] In 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. In turn, the topology of the satellite cell composed of the satellite beam on the ground will also move in the direction of satellite movement. This cell can be called an earth moving cell.

[0083] For terrestrial mobile cells, each cell is assigned a physical cell identifier (PCI). The PCI can be calculated using the following formula:

[0084] in, is the PCI of the cell, The first cell identifier can be calculated based on the pseudo-random sequence (such as the gold sequence) used by the secondary synchronization signal (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 the SSB. The value range is 0, 1, 2. Therefore, the value range of PCI is 0 to 1007.

[0085] The PCI of a terrestrial mobile cell can be bound to a satellite, which manages and allocates the PCI for each cell under it. For example, when a first satellite serves multiple cells, it assigns a PCI to each cell, ensuring that the PCIs of the cells under the satellite are unique.

[0086] Optionally, the PCI of a terrestrial mobile cell can also be bound to a ground station, which 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 unique.

[0087] However, PCI collisions may occur when there are multiple satellites in the NTN communication system.

[0088] 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 these cells have a PCI collision.

[0089] 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.

[0090] It should be understood that the two or more co-frequency cells that have a PCI collision 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.

[0091] For example, Figure 1 is a schematic diagram of a PCI collision in a single-satellite, single-cell scenario, provided by one embodiment of the present application. As shown in Figure 1 , cell A is a cell under the first satellite, and cell B is a cell under the second satellite. If the frequency of both cell A and cell B is F1, the PCI of both cell A and cell B is 1, and the network service ranges of cells A and B overlap (as shown by the shaded area in Figure 1 ), it can be considered that a PCI collision has occurred between cells A and B.

[0092] In an NTN communication system, to avoid PCI collisions, network equipment can calculate the topology of the cells under the current satellite based on the satellite's ephemeris or other information. Based on the relative positions of the satellites, the network equipment can replace the PCI of the cell under the satellite where the PCI collision is imminent. In a satellite transparent transmission scenario, the network equipment can be a base station deployed on the ground; in a satellite regeneration scenario, the network equipment can be a satellite. For example, if the network equipment detects that the PCI and frequency of a first cell on a first satellite are the same as the PCI and frequency of a second cell on a second satellite, and the relative distance between the first and second cells is gradually decreasing, the network equipment can replace the PCI of the first cell to avoid the PCI collision.

[0093] 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, such as 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 reinterpret 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 referred to as the PCI collision cell, and the switching process triggered by the terminal device in the PCI collision cell to avoid the PCI collision is referred to as the first switching.

[0094] 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.

[0095] 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.

[0096] The application scenarios of the embodiments of the present application are illustrated below with reference to FIG2a, FIG2b, and FIG2c.

[0097] Figure 2a shows a schematic diagram of a satellite communication system in a transparent transmission scenario. As shown in Figure 2a, a terminal device can access the network through an air interface (which can be various types of air interfaces, such as a 5G air interface), and network equipment (such as a base station) can be deployed on the ground and connected to a ground station that communicates with the satellite; the satellite can be connected to the ground station via a wireless link; the ground station and the base station can be connected to the core network via a wired or wireless link. Satellites can communicate with each other via wireless links. In the system shown in Figure 2a, the satellites only have transparent transmission and forwarding functions (i.e., the corresponding network equipment is deployed on the ground), and only transparent transmission and forwarding are implemented between satellites.

[0098] Figures 2b and 2c illustrate schematic diagrams of a satellite communication system in a regeneration scenario. As shown in Figure 2b, a terminal device can access the network via an air interface (which can be any type of air interface, such as a 5G air interface). Network equipment (such as a base station) can be deployed on a satellite (e.g., in a satellite regeneration mode), with a base station or some base station functionality deployed on the satellite. Signaling exchanges and user data transmission between base stations can be accomplished between satellites, as shown in Figure 2c.

[0099] For example, the network elements and their interfaces in FIG. 2a to FIG. 2c are described as follows:

[0100] Terminal devices include mobile devices that support the new radio (NR), such as mobile phones and tablets. Terminal devices can access the satellite network through the air interface and initiate calls, access the Internet, and other services.

[0101] The base station is used to provide wireless access services, dispatch wireless resources to access terminal devices, and provide reliable wireless transmission protocols and data encryption protocols.

[0102] The ground station is responsible for forwarding signaling and business data between the satellite and the core network.

[0103] The core network is responsible for user access control, mobility management, session management, user security authentication, or billing. The core network can be composed of multiple functional units, such as functional entities including the control plane and data plane. For example, the core network shown in Figures 2a to 2c may include an access and mobility management function (AMF), a session management function (SMF), and a user plane function (UPF). For example, the AMF can be responsible for user access management, security authentication, and mobility management; the UPF can be responsible for managing the transmission of user plane data and traffic statistics.

[0104] The air interface shown in Figures 2a to 2c 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 interaction 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 service data.

[0105] Optionally, the technical solutions provided in the embodiments of the present application can be applied to 5G mobile communication systems and fourth generation (4G) mobile communication systems, without specific limitation herein. Specifically, if the embodiments of the present application are applied to a 4G mobile communication system, the Xn interface shown in Figures 2a to 2c is an X2 interface, and the NG interface is an S1 interface.

[0106] Optionally, the technical solution provided in the embodiments 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 the medium earth orbit (MEO) NTN communication system and the high earth orbit (HEO) NTN communication system.

[0107] Figure 3 is a schematic diagram of a communication method provided by an embodiment of the present application. As shown in Figure 3, the method may include S310 to S320.

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

[0109] In some implementations, the method of this embodiment can be performed by a network device, or by a chip system, hardware circuit, and / or software module used in the network device. The network device in the subsequent content of this embodiment can optionally be replaced by a chip system, hardware circuit, and / or software module in the network device.

[0110] 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.

[0111] S310: Obtain first configuration information, where the first configuration information is used to instruct a terminal device to perform a first switch, and the first switch is used to avoid a PCI collision.

[0112] As an example, 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, it 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 caused by avoiding the PCI collision, namely, the first switching.

[0113] 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.

[0114] In one 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 the cell reselection configuration before the first cell's PCI is changed and the cell reselection configuration after the first cell's PCI is changed. The cell reselection configuration includes information included in the first configuration information, such as the cell's PCI value.

[0115] Optionally, the first configuration information may be delivered via a system information block (SIB), for example, broadcasted via SIB2 to SIB4.

[0116] In one possible implementation, the first configuration information may be 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.

[0117] 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.

[0118] Optionally, the configuration of the target cell may be a conditional handover (CHO) configuration, including configuration of CHO candidate cells and CHO execution conditions, etc. The CHO execution conditions include a time-triggered CHO condition or a location-triggered CHO condition.

[0119] In one 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 handover to each terminal device in the first cell through a broadcast message, such as the measurement frequency, measurement object, SSB measurement timing configuration (SMTC), etc., and send the remaining configuration of the first handover to each terminal device through RRC signaling.

[0120] 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.

[0121] 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.

[0122] Optionally, if the method is executed by a network device, the network device may send the first configuration information to the terminal device after acquiring the first configuration information; accordingly, the terminal device receives the first configuration information.

[0123] S320: Obtain second configuration information, where the second configuration information is used to instruct the terminal device to cancel the first switching.

[0124] In this embodiment, before the terminal device executes the first switching, it can be determined based on the judgment condition whether the terminal device cancels the execution of the first switching. If the first switching is canceled, it is indicated through the second configuration information.

[0125] Optionally, the decision conditions may be configured in advance in the terminal device or network device to facilitate invocation and improve efficiency.

[0126] In a possible implementation, the first handover may be canceled when the following judgment condition is met: the time difference between the first moment of performing the first handover and the second moment of performing the mobility handover is less than or equal to a first time threshold.

[0127] 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.

[0128] The PCI collision is predictable, so Tw can be determined based on the time when the PCI collision occurs. As an example, Tw can be the time when the PCI collision occurs, or the time when the fourth time threshold is satisfied between the time when the PCI collision occurs and the time when the PCI collision occurs. This application does not make specific limitations on this.

[0129] Optionally, the third configuration information may be NR measurement switching configuration, including measurement object, measurement report configuration, etc.

[0130] Optionally, the terminal device may obtain 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 a measurement report to the network device. After receiving the measurement report, the network device determines whether a suitable target cell exists. If a suitable target cell exists, the network device instructs the terminal device to perform mobility switching at time T1, thereby causing the terminal device to switch to the target cell at time T1.

[0131] 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 starting time of the first time window and the starting time of the second time window is less than or equal to the third time threshold.

[0132] In this implementation, the first configuration information and the third configuration information may both be CHO configurations, and the CHO execution condition in the CHO configuration may be a CHO condition based on time triggering.

[0133] 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 handover, and the second time window may be a time period in the third configuration information indicating that the terminal device performs the mobility handover.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] Optionally, the network device may send the second configuration information only to terminal devices that do not meet the judgment condition.

[0138] 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.

[0139] 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.

[0140] Optionally, a terminal device may be considered to be located at the edge of the first mobile cell when the following condition is met: the difference between the distance between the terminal device's location 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 based on actual needs and is not specifically limited in this application.

[0141] 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 is not specifically limited in this application.

[0142] 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 based on the global navigation satellite system (GNSS) location information, ephemeris information and cell topology information of the terminal device.

[0143] 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 for performing the first switching.

[0144] Optionally, the second configuration information may be carried in at least one of the following messages: PUSCH, PUCCH.

[0145] 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.

[0146] 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.

[0147] Fig. 4 is a schematic diagram of a communication method provided by another embodiment of the present application. As shown in Fig. 4 , the method may include S410 to S450.

[0148] In this embodiment, the method can be executed by a network device, or by a chip system, hardware circuit and / or software module applied to the network device. This application is uniformly explained with reference to the network device.

[0149] 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.

[0150] S410: Determine a PCI collision cell.

[0151] As an example, a network device may determine, based on satellite and cell topology information, the first cell under the satellite that has a PCI collision with a neighboring cell. The cell topology information may include relative movement and positional relationships of the cell topology. A neighboring cell may be understood as a cell adjacent to the first cell under another satellite.

[0152] It should be noted that this embodiment does not limit the specific implementation method for determining the PCI collision cell.

[0153] S420: Send 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.

[0154] In this embodiment, when a network device predicts an impending PCI collision between a first cell of a first satellite and an adjacent second cell, it sends a first configuration message to all terminal devices in the first cell, instructing the terminal devices in the cell to execute a handover process, i.e., a first handover, to avoid the PCI collision. In response, the terminal devices receive the first configuration message. The specific implementation of S420 can be found in the detailed description of S310 and is not further elaborated here.

[0155] As an example, the first configuration information may be a CHO switching configuration, and the CHO switching configuration is a CHO execution condition triggered based on time, for example, the execution condition is condEventT1, and condEventT1 includes a time window [t1, t2] for executing the first switching.

[0156] 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.

[0157] S430: Send third configuration information, where the third configuration information is used to instruct the terminal device to perform mobility switching.

[0158] In this embodiment, the network device can determine whether the terminal device needs to perform mobility handover based on 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 a threshold, the network device sends third configuration information to the terminal device in a connected state in the cell to instruct the terminal device to perform mobility handover; in response, the terminal device receives the third configuration information. The threshold value can be set according to actual needs and is not specifically limited here.

[0159] Optionally, the third configuration information may be UE-level RRC-reconfiguration signaling.

[0160] As an example, the third configuration information may be NR measurement switching configuration, including measurement object, measurement report configuration, etc.

[0161] 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.

[0162] Exemplarily, Figure 5 is a schematic diagram of a switching scenario provided by an embodiment of the present application. As shown in Figure 5, 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 the 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.

[0163] 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 thus can instruct the terminal device to switch to the second mobile cell according to the CGI.

[0164] 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.

[0165] As shown in Figure 5, if the network device is preparing 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.

[0166] Optionally, when the PCIs of the first mobile cell and the third mobile cell are different, the first mobility cell and the second mobile cell may be cells under the same satellite or cells under different satellites, which is not specifically limited here.

[0167] 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. The network device instructs the terminal device to switch to the second mobile cell based on the PCI reported by the terminal device.

[0168] As an example, the third configuration information may be CHO handover configuration, including configuration of CHO candidate cells and CHO execution conditions, etc.

[0169] 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.

[0170] 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.

[0171] In this embodiment, the execution of S420 and S430 is not prioritized, and S420 may be executed first and then S430, or S430 may be executed first and then S420.

[0172] S440: Determine whether the terminal device cancels the first switching.

[0173] 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.

[0174] 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 executing the first switching for the terminal device, and the third configuration information includes a time window [t3, t4] configured for executing the mobility switching for the terminal device.

[0175] 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 the 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 switching; if the time length of the overlapping area is greater than the second time threshold, the terminal device performs the first switching within the first time window.

[0176] Optionally, the network device can also determine whether 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 a third time threshold. If 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, the terminal device cancels the execution of the first switch; if the time difference between the starting moment of the first time window and the starting moment of the second time window is greater than the third time threshold, the terminal device executes the first switch within the first time window.

[0177] S450: Send second configuration information, where the second configuration information is used to instruct the terminal device to cancel the first switching.

[0178] In this embodiment, after the network device confirms that the terminal device cancels the execution of the first switch based on 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 for executing the first switch, thereby saving resources; accordingly, the terminal device receives the second configuration information. 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, reducing signaling overhead and the loss of the terminal device.

[0179] Fig. 6 is a schematic diagram of a communication method provided by yet another embodiment of the present application. As shown in Fig. 6 , the method may include S610 to S650.

[0180] In this embodiment, the method can be executed by a terminal device, or by a chip system, hardware circuit and / or software module applied to the terminal device. This application is uniformly explained with reference to the terminal device.

[0181] S610: Receive first configuration information, where the first configuration information is used to instruct a terminal device to perform a first switch, and the first switch is used to avoid a PCI collision.

[0182] In this embodiment, the terminal device may receive the first configuration information sent by the network device.

[0183] The specific content of the first configuration information in S610 can be found in the relevant detailed description in S310 or S420, and will not be repeated here.

[0184] S620: Receive third configuration information, where the third configuration information is used to instruct the terminal device to perform mobility switching.

[0185] In this embodiment, the terminal device may receive the third configuration information sent by the network device.

[0186] 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.

[0187] In this embodiment, the execution of S610 and S620 is not prioritized, and S610 may be executed first and then S620, or S620 may be executed first and then S610.

[0188] S630: Determine whether the terminal device cancels the first switching.

[0189] In this embodiment, the terminal device may determine whether to cancel the first switching according to the determination condition.

[0190] 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.

[0191] S640: Send second configuration information, where the second configuration information is used to instruct the terminal device to cancel the first switching.

[0192] 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 signaling overhead and the loss of the terminal device; accordingly, the network device receives the second configuration information. 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.

[0193] S650: Execute switching.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] 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 instructs the terminal device to cancel the first handover, and when the value of the fourth configuration information is "1", it instructs the terminal device to execute the first handover. For another example, when the value of the fourth configuration information is "1", it instructs the terminal device to cancel the first handover, and when the value of the fourth configuration information is "0", it instructs the terminal device to execute the first handover.

[0199] 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.

[0200] 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 "enabled" and "disabled". In the "enabled" state, the terminal device needs to perform the first switch, and in the "disabled" state, the terminal device can cancel the execution of the first switch.

[0201] Optionally, when the first configuration information is a CHO handover configuration, the fourth configuration information may be included in the CHO execution condition to implicitly instruct the terminal device to perform the first handover. For example, when the CHO execution condition is a time-triggered CHO condition, the terminal device performs the first handover when the length of the time window for performing the first handover is greater than or equal to a fifth time threshold. The fifth time threshold may be set based on actual circumstances and is not specifically limited in this application.

[0202] 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.

[0203] In this implementation, if the network device determines that the terminal device needs to perform the first handover based on factors such as the network system load, it can send fourth configuration information to the terminal device to instruct the terminal device to forcibly perform the first handover. Accordingly, after receiving the fourth configuration information, the terminal device performs the first handover and stops executing S630 and S640.

[0204] Figure 7 is a schematic diagram of the structure of a communication device provided in one embodiment of the present application. The device 700 shown in Figure 7 can be used to implement the steps performed by the terminal device or network device in Figures 3, 4, or 6. As shown in Figure 7, the device 700 of this embodiment may include: an acquisition module 710, a sending module 720, and a processing module 730.

[0205] When the apparatus 700 is used to implement the method shown in FIG. 3 , the acquisition module 710 may be used to implement S310 and S320 .

[0206] When the device 700 is used to implement the method shown in Figure 4, the acquisition module 710 can be used to implement the operations performed by the terminal device in S420, S430 and S450, and 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.

[0207] When the device 700 is used to implement the method shown in Figure 6, 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.

[0208] Figure 8 is a schematic diagram of the structure of a communication device provided in another embodiment of the present application. The device shown in Figure 8 can be used to implement the method executed by the terminal device or network device in any of the above embodiments.

[0209] As shown in Figure 8 , the apparatus 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 via the bus 840.

[0210] 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 programs. When the program stored in the memory 810 is executed by the processor 820, the processor 820 is configured to execute the steps performed by the terminal device or the network device in the method shown in FIG. 3 , FIG. 4 , or FIG. 6 .

[0211] The processor 820 can be a general-purpose 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.

[0212] The processor 820 may also be an integrated circuit chip with signal processing capabilities. 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.

[0213] 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 processor 820 may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor.

[0214] The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed 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, in combination with its hardware, completes the functions required to be executed by the modules included in the communication device of the present application. For example, the various steps / functions performed by the terminal device or the network device in the method shown in Figures 3, 4, or 6 can be executed.

[0215] Optionally, the memory 810 and the processor 820 may be integrated together.

[0216] 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.

[0217] 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 ).

[0218] 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), one or more microprocessors (digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs). For another example, when a module is implemented by 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 processor that can call a program code, 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).

[0219] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, software modules 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 a 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 device. 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 one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. 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 drive (SSD)).

[0220] The term "plurality" in this article refers to two or more. The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: 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 the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0221] It will be understood that the various numerical numbers involved in the embodiments of the present application are merely distinctions for the convenience of description and are not intended to limit the scope of the embodiments of the present application.

[0222] 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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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