Cell switching method, device and system

Abstract

Provided are a cell switching method, device and system, the method being applied to a first base station, comprising: if it is determined that user equipment (UE) needs to be switched from a first cell to a second cell, determining whether the UE can use a first radio resource configuration in the second cell, the first radio resource configuration is allocated to the UE by the first cell; and if the UE can use the first radio resource configuration in the second cell, sending a first switching command to the UE, the first switching command being used for instructing the UE to use the first radio resource configuration in the second cell. The network overhead can be reduced.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a cell switching method, device and system. Background Art

[0002] The communication of non-terrestrial networks (NTN), represented by non-terrestrial equipment such as satellites, drones, and high-altitude platforms, has the advantages of wide coverage, long communication distance, high reliability, high flexibility, and high throughput. Since this communication method is not affected by geographical environment, climatic conditions, and natural disasters, it has been widely used in aviation communications, maritime communications, military communications, and other fields. Introducing NTN equipment, such as satellites, into the fifth-generation mobile network (5th-Generation, 5G) and the future fifth-generation mobile network (5th-Generation, 5G), can provide communication services for areas that are difficult to cover by terrestrial networks, such as oceans and forests, and can enhance the reliability of 5G communications, such as providing more stable and high-quality communication services for users on trains, airplanes, and these vehicles, and can also provide more data transmission resources and support a larger number of connections.

[0003] However, due to the mobility of satellites or user equipment (UE), UE often switches cells, so switching commands need to be frequently transmitted in the communication network, resulting in a large network overhead. Summary of the invention

[0004] The present application provides a cell switching method, device and system, which can reduce network overhead.

[0005] In a first aspect, the present application provides a cell switching method, which is applied in a first base station, comprising: if it is determined that a user equipment UE needs to be switched from a first cell to a second cell, determining whether the UE can use a first wireless resource configuration in the second cell, wherein the first wireless resource configuration is allocated to the UE by the first cell; if the UE can use the first wireless resource configuration in the second cell, sending a first switching command to the UE, the first switching command being used to instruct the UE to use the first wireless resource configuration in the second cell.

[0006] The cell switching method provided in the present application can be applied in a scenario where both the first cell and the second cell are service cells of the first base station, wherein the first cell is the source cell and the second cell is the target cell. When the UE switches from the source cell to the target cell, the first base station can determine whether the wireless resource configuration that the second cell can currently allocate to the UE is the same as the first wireless resource configuration that the source cell has allocated to the UE. If they are the same, the UE is instructed to continue to use the first wireless resource configuration in the second cell. Since the UE continues to use the first wireless resource configuration, it is no longer necessary to reconfigure the resource, which reduces the transmission overhead of reconfiguring the wireless resource between the first base station and the UE network, that is, reduces the network overhead.

[0007] In a possible implementation, if the first base station determines that the UE needs to switch from the source cell to the target cell, and determines whether the UE can continue to use the first wireless resource configuration in the second cell, that is, determines whether the UE can inherit the first wireless resource configuration in the target cell, if yes, then sends a first switching command to the UE. When the UE receives the first switching command, since the first switching command does not carry a new wireless resource configuration, the UE can judge that it can continue to use the first wireless resource configuration after switching to the target cell, and according to the first switching command, update the current serving cell to the second cell. The first switching command can carry a first identifier, and the first identifier is used to indicate the identifier of the second cell. Optionally, the identifier indicating the second cell can be a physical cell identifier (PCI) indicating the second cell. Since the direct transmission distance between the UE and the NTN device is far, the transmission overhead is greater than that of ground communication transmission. Therefore, reducing the transmission overhead when switching cells can greatly reduce network overhead.

[0008] Optionally, the first base station determines whether the radio resource of the target cell is occupied based on the radio resource in the first radio resource configuration. If it is not occupied, that is, idle, the same radio resource can be allocated to the UE, and the UE can continue to use the first radio resource configuration in the target cell. If it is occupied, it is determined that the UE cannot use the first radio resource configuration in the second cell, and the second cell reallocates radio resources to the UE and generates a second radio resource configuration. The first base station sends a second handover command to the UE, and the second handover command carries the second radio resource configuration.

[0009] In a possible implementation manner, the handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

[0010] In a possible implementation manner, the first base station and the UE may determine the type of the handover command by pre-agreement or according to protocol provisions, etc. If the handover command including the second wireless resource configuration is determined to be the second handover command, if the UE receives the second handover command, the UE reconfigures according to the second wireless resource configuration indicated in the second handover command.

[0011] In a possible implementation, the third cell is a service cell of the second base station, the second cell is a service cell of the first base station, and the UE needs to be switched from the third cell of the second base station to the second cell. In this scenario, the third cell is a source cell and the second cell is a target cell. The UE needs to be switched from the source cell to the target cell, which is equivalent to the second base station and the first base station needing to interact. The cell switching method also includes: receiving a switching request, the switching request is sent by the second base station when the UE needs to switch from the third cell to the second cell, the switching request is used to request the UE to use a third wireless resource configuration in the second cell, and the third wireless resource configuration is allocated to the UE by the third cell; if the UE can use the third wireless resource configuration in the second cell, sending a first switching request confirmation to the second base station, the first switching request confirmation is used to instruct the UE to use the third wireless resource configuration in the second cell, so that the second base station sends the first switching command to the UE, and the first switching command is also used to instruct the UE to use the third wireless resource configuration in the second cell; if the UE cannot use the third wireless resource configuration in the second cell, sending a second switching request confirmation to the second base station, the second switching request confirmation is used to instruct the UE to use the second wireless resource configuration in the second cell, so that the second base station sends the second switching command to the UE.

[0012] The cell switching method provided in the present application can be applied to the scenario where the target cell is the second cell of the first base station and the source cell is the third cell of the second base station. The second base station allocates a third wireless resource configuration to the UE. When the UE needs to switch from the third cell to the second cell, the second base station makes a request to the first base station to continue to use the third wireless resource configuration. The first base station determines whether the third wireless resource configuration can continue to be used in the second cell, that is, whether the wireless resources that the second cell can currently provide to the UE are the same as the wireless resources in the third wireless resource configuration allocated to the UE by the third cell. If they are the same, the UE can continue to use the third wireless resource configuration in the second cell without the need to reconfigure the resources, thereby reducing the overhead caused by reconfiguring the wireless resources between the first base station and the UE network.

[0013] In the scenario where the target cell is the second cell of the first base station and the source cell is the third cell of the second base station, the first base station, the second base station and the UE may determine the category of the handover command by pre-agreement or according to protocol provisions. If it is determined that the handover command including the second wireless resource configuration is the second handover command, if the UE receives the second handover command, it reconfigures according to the second wireless resource configuration indicated in the second handover command; if the handover command carries only the first identifier, it is the first handover command; if the UE receives the first handover command, it inherits the third wireless resource configuration, that is, continues to use the third wireless resource configuration in the second cell.

[0014] In a possible implementation, the method further includes: determining, according to a pre-stored resource allocation rule, whether the UE uses the first wireless resource configuration or the second wireless resource configuration in the second cell. In a scenario where both the first cell and the second cell are service cells of the first base station, the first base station may pre-store the resource allocation rule, and both the first cell and the second cell allocate wireless resources to the UE according to the pre-stored resource allocation rule.

[0015] In a possible implementation, the method further includes: receiving a negotiation request sent by the second base station, the negotiation request being used to indicate a resource allocation rule; and determining, according to the resource allocation rule, that the UE uses the third wireless resource configuration or the second wireless resource configuration in the second cell. In a scenario where the target cell is the second cell of the first base station and the source cell is the third cell of the second base station, the first base station and the second base station negotiate to determine the resource allocation rule, and according to the resource allocation rule, the second cell and the third cell allocate wireless resources to the UE.

[0016] Since the cell switching method provided in the present application needs to determine whether the wireless resources allocated to the UE by the second cell, that is, the target cell, can continue to use the wireless resource configuration allocated to the UE by the source cell, such as the first wireless resource configuration allocated by the first cell, or the third wireless resource configuration allocated by the third cell, in order to increase the possibility that the UE can inherit the wireless resource configuration, in the present application, each cell can allocate wireless resources to the UE through resource allocation rules and obtain the wireless resource configuration, thereby achieving the effect of reducing network overhead.

[0017] In a second aspect, the present application provides a cell switching method, which is applied in a UE and includes: receiving a first switching command, wherein the first switching command is used to instruct the UE to use a first wireless resource configuration in a second cell, and the first wireless resource configuration is allocated to the UE by the first cell; according to the first switching command, switching from the first cell to the second cell, and using the first wireless resource configuration in the second cell.

[0018] This method can be applied in a scenario where both the first cell and the second cell are service cells of a first base station, wherein the first cell is a source cell and the second cell is a target cell.

[0019] In one possible implementation, it also includes: switching from the third cell to the second cell according to the first switching command, and using the third wireless resource configuration in the second cell, and the first switching command is also used to instruct the UE to use the third wireless resource configuration in the second cell, and the third wireless resource configuration is allocated to the UE by the third cell.

[0020] This method can be applied in a scenario where the third cell is a service cell of a second base station and the second cell is a service cell of a first base station, wherein the third cell is a source cell and the second cell is a target cell.

[0021] In a possible implementation manner, the handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

[0022] In the third aspect, the present application provides a cell switching method, which is applied in a second base station, including: if it is determined that a user equipment UE needs to be switched from a third cell to a second cell, a switching request is sent to a first base station, and the switching request is used to request the UE to use a third wireless resource configuration in the second cell, and the third wireless resource configuration is allocated to the UE by the third cell; if a first switching request confirmation is received, a first switching command is sent to the UE, and the first switching request confirmation is used to instruct the second base station that the UE uses the third wireless resource configuration in the second cell, and the first switching command is used to instruct the UE to use the third wireless resource configuration in the second cell.

[0023] This method can be applied in a scenario where the third cell is a service cell of a second base station and the second cell is a service cell of a first base station, wherein the third cell is a source cell and the second cell is a target cell.

[0024] In one possible implementation, it also includes: if a second switching request confirmation is received, sending a second switching command to the UE, the second switching request confirmation is used to instruct the second base station to use the second wireless resource configuration in the second cell, the second switching command carries the second wireless resource configuration, and the second wireless resource configuration is allocated by the second cell to the UE.

[0025] In a possible implementation manner, the method further includes: the handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

[0026] In a possible implementation, the method further includes: sending a negotiation request to the first base station, where the negotiation request is used to indicate a resource allocation rule; and determining, based on the resource allocation rule, that the UE uses the third wireless resource configuration in the third cell.

[0027] In a fourth aspect, the present application provides a cell switching method, which is applied in a first base station, and includes: receiving a switching request, wherein the switching request is sent by the second base station when the UE needs to switch from a third cell to a second cell, and the switching request is used to request the UE to use a third wireless resource configuration in the second cell, and the third wireless resource configuration is allocated to the UE by the third cell; if the UE can use the third wireless resource configuration in the second cell, sending a first switching request confirmation to the second base station, and the first switching request confirmation is used to instruct the UE to use the third wireless resource configuration in the second cell, so that the second base station sends the first switching command to the UE, and the first switching command is also used to instruct the UE to use the third wireless resource configuration in the second cell.

[0028] In one possible implementation, it also includes: if the UE cannot use the third wireless resource configuration in the second cell, sending a second switching request confirmation to the second base station, the second switching request confirmation is used to instruct the UE to use the second wireless resource configuration in the second cell, so that the second base station sends a second switching command to the UE, and the second wireless resource configuration is allocated by the second cell to the UE.

[0029] In a possible implementation manner, the handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

[0030] In one possible implementation, it also includes: receiving a negotiation request sent by the second base station, where the negotiation request is used to indicate a resource allocation rule; and determining, based on the resource allocation rule, whether the UE uses the third wireless resource configuration or the second wireless resource configuration in the second cell.

[0031] In the fifth aspect, the present application provides a first base station, comprising: a processing module, used to determine whether the UE can use a first wireless resource configuration in the second cell if it is determined that the UE needs to switch from the first cell to the second cell, wherein the first wireless resource configuration is allocated to the UE by the first cell; a sending module, used to send a first switching command to the UE if the processing module determines that the UE can use the first wireless resource configuration in the second cell, and the first switching command is used to instruct the UE to use the first wireless resource configuration in the second cell.

[0032] In one possible implementation, the sending module is also used to send a second switching command to the UE if the processing module determines that the UE cannot use the first wireless resource configuration in the second cell, and the second switching command carries a second wireless resource configuration, wherein the second wireless resource configuration is allocated to the UE by the second cell.

[0033] In a possible implementation, it also includes: a receiving module, used to receive a handover request, the handover request is sent by the second base station when the UE needs to switch from the third cell to the second cell, the handover request is used to request the UE to use the third wireless resource configuration in the second cell, and the third wireless resource configuration is allocated to the UE by the third cell; the sending module is also used to send a first handover request confirmation to the second base station if the processing module determines that the UE can use the third wireless resource configuration in the second cell, the first handover request confirmation is used to instruct the UE to use the third wireless resource configuration in the second cell, so that the second base station sends the first handover command to the UE, and the first handover command is also used to instruct the UE to use the third wireless resource configuration in the second cell; the sending module is also used to send a second handover request confirmation to the second base station if the processing module determines that the UE cannot use the third wireless resource configuration in the second cell, the second handover request confirmation is used to instruct the UE to use the second wireless resource configuration in the second cell, so that the second base station sends the second handover command to the UE.

[0034] In a possible implementation manner, the handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

[0035] In a possible implementation, the processing module is specifically configured to determine, according to a pre-stored resource allocation rule, whether the UE uses the first radio resource configuration or the second radio resource configuration in the second cell.

[0036] In one possible implementation, the receiving module is further used to receive a negotiation request sent by the second base station, where the negotiation request is used to indicate a resource allocation rule; the processing module is further used to determine whether the UE uses the third wireless resource configuration or the second wireless resource configuration in the second cell based on the resource allocation rule.

[0037] In the sixth aspect, the present application provides a UE, including: a receiving module, used to receive a first switching command, wherein the first switching command is used to instruct the UE to use a first wireless resource configuration in a second cell, and the first wireless resource configuration is allocated to the UE by the first cell; a processing module, used to switch from the first cell to the second cell according to the first switching command, and use the first wireless resource configuration in the second cell.

[0038] In one possible implementation, the first switching command is also used to instruct the UE to use the third wireless resource configuration in the second cell, and the processing module is further used to switch from the third cell to the second cell according to the first switching command, and use the third wireless resource configuration in the second cell, and the third wireless resource configuration is allocated to the UE by the third cell.

[0039] In a possible implementation manner, the handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

[0040] In a seventh aspect, the present application provides a second base station, comprising: a sending module, configured to send a handover request to a first base station if a processing module determines that a user equipment UE needs to be handed over from a third cell to a second cell, wherein the handover request is used to request the UE to use a third wireless resource configuration in the second cell, and the third wireless resource configuration is allocated by the third cell to the UE;

[0041] The sending module is also used to send a first switching command to the UE if the receiving module receives a first switching request confirmation, the first switching request confirmation is used to instruct the second base station that the UE uses the third wireless resource configuration in the second cell, and the first switching command is used to instruct the UE to use the third wireless resource configuration in the second cell.

[0042] In one possible implementation, the sending module is also used to send a second switching command to the UE if the receiving module receives a second switching request confirmation, and the second switching request confirmation is used to instruct the second base station to use the second wireless resource configuration in the second cell, and the second switching command carries the second wireless resource configuration, which is allocated by the second cell to the UE.

[0043] In a possible implementation manner, the handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

[0044] In one possible implementation, the sending module is further used to send a negotiation request to the first base station, wherein the negotiation request is used to indicate a resource allocation rule; the processing module is further used to determine, based on the resource allocation rule, that the UE uses the third wireless resource configuration in the third cell.

[0045] In the eighth aspect, the present application provides a first base station, comprising: a receiving module, receiving a switching request, the switching request is sent by the second base station when the UE needs to switch from the third cell to the second cell, and the switching request is used to request the UE to use a third wireless resource configuration in the second cell, and the third wireless resource configuration is allocated to the UE by the third cell; the sending module is also used to send a first switching request confirmation to the second base station if the processing module determines that the UE can use the third wireless resource configuration in the second cell, and the first switching request confirmation is used to instruct the UE to use the third wireless resource configuration in the second cell, so that the second base station sends the first switching command to the UE, and the first switching command is also used to instruct the UE to use the third wireless resource configuration in the second cell.

[0046] In one possible implementation, the sending module is also used to send a second switching request confirmation to the second base station if the processing module determines that the UE cannot use the third wireless resource configuration in the second cell, and the second switching request confirmation is used to instruct the UE to use the second wireless resource configuration in the second cell, so that the second base station sends a second switching command to the UE, and the second wireless resource configuration is allocated to the UE by the second cell.

[0047] In a possible implementation manner, the handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

[0048] In one possible implementation, the receiving module is further used to receive a negotiation request sent by the second base station, where the negotiation request is used to indicate a resource allocation rule; the processing module is further used to determine whether the UE uses the third wireless resource configuration or the second wireless resource configuration in the second cell based on the resource allocation rule.

[0049] In a ninth aspect, the present application provides a system, comprising: a UE and a first base station, wherein the first base station is used to implement part or all of the operations of any possible implementation method of the first aspect; and the UE is used to implement part or all of the operations of any possible implementation method of the second aspect.

[0050] In one possible implementation, the system further includes a second base station, which is used to implement part or all of the operations of any possible implementation of the third aspect.

[0051] In the tenth aspect, the present application provides a system, including: a UE, a first base station, and a second base station, wherein the first base station is used to implement part or all of the operations of any possible implementation method of the first aspect, or the first base station is used to implement part or all of the operations of any possible implementation method of the fourth aspect; the UE is used to implement part or all of the operations of any possible implementation method of the second aspect, and the second base station is used to implement part or all of the operations of any possible implementation method of the third aspect.

[0052] In an eleventh aspect, the present application provides a communication device, comprising at least one processor and a communication interface, wherein the interface circuit is used to exchange computer instructions or data with the processor; when the at least one processor executes a program or instruction, the communication device implements part or all of the operations of the first aspect and any possible implementation of the first aspect; or, the communication device implements part or all of the operations of the second aspect and any possible implementation of the second aspect; or, the communication device implements part or all of the operations of the third aspect and any possible implementation of the third aspect; or, the communication device implements part or all of the operations of the fourth aspect and any possible implementation of the fourth aspect.

[0053] In the twelfth aspect, the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements part or all of the operations included in the method described in any of the preceding aspects and any possible implementation method of any of the preceding aspects.

[0054] In a thirteenth aspect, the present application provides a computer program product, which includes instructions, and when the computer program product is executed on a processor, implements part or all of the operations included in the method described in any of the preceding aspects and any possible implementation method of any of the preceding aspects.

[0055] In a fourteenth aspect, the present application provides a chip, including: a port circuit and a processor. The port circuit is connected to the processor, and the processor is used to enable the chip to perform part or all of the operations included in the method described in any of the above aspects and any possible implementation of any of the above aspects.

[0056] It should be understood that the second to fourteenth aspects of the present application are consistent with or corresponding to the technical solutions of the first aspect of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0058] Figure 1 It is a schematic diagram of a network structure of ground communication provided by an embodiment of the present application;

[0059] Figure 2 It is a structural schematic diagram of a first deployment solution for identifying a cell in a satellite provided in an embodiment of the present application;

[0060] Figure 3 It is a structural schematic diagram of a second deployment solution for identifying a cell in a satellite provided in an embodiment of the present application;

[0061] Figure 4 It is a flowchart of a cell switching method provided in an embodiment of the present application;

[0062] Figure 5 It is a flowchart of another cell switching method provided in an embodiment of the present application;

[0063] Figure 6 It is a flowchart of another cell switching method provided in an embodiment of the present application;

[0064] Figure 7 It is a transparent architecture diagram of a satellite communication network provided in an embodiment of the present application;

[0065] Figure 8It is a schematic diagram of a regeneration architecture of a satellite communication network provided in an embodiment of the present application;

[0066] Fig. 9 It is a schematic diagram of another regeneration architecture of a satellite communication network provided in an embodiment of the present application;

[0067] Fig.10 It is a schematic diagram of another regeneration architecture of a satellite communication network provided in an embodiment of the present application;

[0068] Fig.11 It is a flowchart of another cell switching method provided in an embodiment of the present application;

[0069] Fig.12 This is a schematic diagram of a scenario in which different physical areas correspond to resource groups provided in an embodiment of the present application;

[0070] Fig.13 is a structural diagram of a first base station provided in an embodiment of the present application;

[0071] Fig.14 is a structural diagram of another first base station provided in an embodiment of the present application;

[0072] Fig.15 It is a structural diagram of a UE provided in an embodiment of the present application;

[0073] Fig.16 is a structural diagram of a second base station provided in an embodiment of the present application;

[0074] Fig.17 is a schematic diagram of the structure of a device 60 according to an embodiment of the present application;

[0075] Fig.18 is a schematic diagram of the structure of a device 70 according to an embodiment of the present application;

[0076] Fig.19 is a structural diagram of a system 600 provided in an embodiment of the present application;

[0077] Fig. 20 It is a structural diagram of a system 700 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0078] In order to enable those skilled in the art to better understand the solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0079] 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 mean: A exists alone, A and B exist at the same time, and B exists alone.

[0080] The terms "first" and "second" in the description and claims of the embodiments of the present application are used to distinguish different objects rather than to describe a specific order of objects. For example, a first target object and a second target object are used to distinguish different target objects rather than to describe a specific order of target objects.

[0081] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0082] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more than two. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

[0083] For ease of understanding, the following first explains the relevant nouns or terms used in the embodiments of the present application:

[0084] 1. NTN equipment

[0085] NTN is a general term for networks involving non-ground flying objects (equipment). Non-ground networks can generally include satellite communication networks, high altitude platform systems (HAPS) and air-to-ground networks. The NTN devices applicable to the embodiments of the present application have the characteristics of the above-mentioned NTN. NTN devices include satellites, airships, drones, etc.

[0086] 2.UE

[0087] Also known as terminal equipment, mobile station (MS), mobile terminal (MT), etc., it refers to a device that provides at least one of voice and data connectivity to users. For example, UE includes: mobile phones, laptops, PDAs, tablets, mobile Internet devices (MID), wearable devices, augmented reality (AR) devices, virtual reality (VR) devices, wireless terminals in smart cities (Smart City), wireless terminals in smart homes (Smart Home), wireless terminals in industrial control (Industrial Control), wireless terminals in self-driving (Self Driving), wireless terminals in remote medical surgery (Remote Medical Surgery), wireless terminals in smart grids (Smart Grid), wireless terminals in transportation safety (Transportation Safety), etc.

[0088] 3. Base Station

[0089] Also known as access network equipment, it refers to the Radio Access Network (RAN) node (or device) that connects the UE to the wireless network. RAN nodes include: evolved Node B (gNB), Transmission Reception Point (TRP), evolved Node B (eNB), Wireless Fidelity (Wifi) Access Point (AP), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station, or Base Band Unit (BBU), etc. Exemplarily, in a possible network structure, the base station may include a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node, wherein the RAN device including the CU node and the DU node splits the protocol layer of the gNB in ​​the NR system, and the functions of some protocol layers are centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU.

[0090] 4. Core network equipment

[0091] Refers to the equipment in the core network (CN) that provides service support for UE. Core network equipment includes access and mobility management function (AMF) entity, session management function (SMF) entity, user plane function (UPF) entity, etc.

[0092] Figure 1 is a schematic diagram of a network structure of ground communication provided by an embodiment of the present application, such as Figure 1 As shown, the network 100 includes a base station 10 and a UE 20. For terrestrial communications, a base station may include multiple cells. The identification of each cell is relatively stable and does not change within a certain period of time, such as within a month. The identification of a cell includes a cell identification and a broadcast area identification. The cell identification includes a PCI and a global cell identification (Cell Global Identifier, CGI); the broadcast area identification includes a tracking area code (Tracking Area Code, TAC) and a tracking area identity (Tracking Area Identity, TAI). Figure 1 , the base station 10 includes a first cell and a second cell. The embodiment of the present application is described by taking the case where the UE needs to update the PCI of the cell after performing cell switching, and the PCIs of the first cell and the second cell are different as an example, but the invention is not limited thereto.

[0093] For NTN, taking satellite communication as an example, since satellites move at high speed, the physical area covered by satellites is changing. The higher the satellite's orbit, the larger its coverage area, and the longer the communication delay. Generally speaking, satellite orbits can be divided into low orbit (LEO), medium orbit (MEO) and geosynchronous orbit (also known as geostationary orbit) (GEO) according to their altitudes. Among them, the orbit altitude of LEO is 160km to 2000km; the orbit altitude of MEO is 2000km to 35786km; the orbit altitude of GEO is 35786km. The relative position of satellites operating in this orbit and the earth is not affected by the rotation of the earth. For the cell identification and broadcast area identification in the satellite, there are two deployment schemes:

[0094] The first deployment scheme is as follows Figure 2 As shown, the identity of each cell is bound to the physical area. Figure 1 The first and second cells in Figure 2 The physical area 2 of the first cell and the second cell on the earth does not change, and the corresponding cell identifiers and broadcast area identifiers are unchanged or unchanged for a period of time. Furthermore, the frequencies corresponding to the first cell and the second cell are also unchanged. Figure 2 , when a satellite (which can be called an old satellite, Figure 2 After the satellite 2 in the figure is removed, other satellites (which can be called new satellites) are replaced by Figure 2 For example, satellite 1 in FIG. 1 provides communication services for the first cell and the second cell. For example, Figure 2 The moving trajectory of the satellite is that after satellite 2 moves, its coverage area changes, and the coverage of physical area 2 changes to covering physical area 3. After satellite 1 moves, the coverage area changes from physical area 1 to physical area 2. Since the first cell and the second cell are still in physical area 2, the physical area has not changed. For the new satellite in physical area 2, that is, satellite 1, since the physical area of ​​the first cell has not changed, the cell identifier of the first cell is the same as the cell identifier of the first cell in satellite 2, and the area identifier broadcast by the first cell in satellite 1 is the same as the area identifier broadcast by the first cell in satellite 2. The second cell is the same. In this deployment method, the cell identifier and the physical area are bound. Assuming that the position of the UE does not change, the cell perceived by the UE does not change. Under this deployment, the high-speed movement of the satellite will not change the cell perceived by the UE. In the physical area of ​​coverage identified by the satellite, each cell still corresponds to the cell identifier of its current physical area. There is no need to trigger the cell switching process for the UE due to the replacement of the satellite, thereby reducing the number of cell switching in the network and reducing the signaling overhead. The cell under this deployment scheme can be called a quasi-earth fixed cell.

[0095] The second deployment scheme is Figure 3 As shown, the identification of each cell is bound to the satellite, refer to Figure 3 In the example of satellite 1 covering physical area 1, satellite 2 covering physical area 2, satellite 3 covering physical area 3, the identifier of the first cell in physical area 1 covered by satellite 1 is bound to satellite 1, the identifier of the second cell in physical area 2 covered by satellite 2 is bound to satellite 2, and the identifier of the third cell in physical area 3 covered by satellite 3 is bound to satellite 3. It can be understood that the identifiers of these cells are scanned on the physical coverage area as the satellite moves. Assuming that the moving trajectory of satellite 1 is from covering physical area 1 to covering physical area 2, Figure 3The position of the first cell shown is equivalent to the movement of satellite 1, which corresponds to Figure 3 The position of the second cell currently shown, that is, the current Figure 3 Even if the UE at the location where the second cell is shown does not move, the movement of satellite 2 causes the cell accessed by the UE to be switched from the second cell to the first cell.

[0096] In these two deployment schemes, whether in the first deployment scheme, the UE frequently switches cells due to the movement of the UE (rapid movement), or in the second deployment scheme, the UE frequently switches cells due to the rapid movement of the satellite. Frequent switching of cells and reconfiguration of wireless resources will cause the problem of large network overhead for switching, increasing the burden on the network. Especially for NTN communications, the transmission distance of signals such as switching signaling and wireless resource configuration is longer, which will cause greater network overhead than terrestrial network communications and a heavier network burden. In order to solve this problem, an embodiment of the present application provides a method for cell switching, which can reduce the network overhead caused by switching cells. The embodiment of the present application takes the NTN device as a satellite as an example for explanation, and other NTN devices such as airships can be implemented with reference to the embodiment of the present application, and will not be described one by one.

[0097] Figure 4 is a flowchart of a cell switching method provided in an embodiment of the present application, such as Figure 4 As shown, the method is applied in the first base station, referring to Figure 1 The service cell of the first base station 10 includes a first cell and a second cell. The first cell where the UE is currently located is a source cell, and the second cell to be switched to is a target cell. The method includes: S101 and S102.

[0098] S101. If the first base station determines that the UE needs to switch from the first cell to the second cell, it determines whether the UE can use the first wireless resource configuration in the second cell, where the first wireless resource configuration is allocated to the UE by the first cell.

[0099] The first cell and the second cell are both service cells of the first base station. A cell being a service cell of a certain base station means that the cell is a cell managed or served by the base station.

[0100] Exemplarily, the UE is in the first cell, and the first cell, i.e., the source cell, allocates the first radio resource configuration to the UE. The first base station determines whether to agree that the UE continues to use the first radio resource configuration in the second cell, i.e., the target cell. The judgment can be made based on whether the radio resources corresponding to the first radio resource configuration in the current radio resources of the target cell belong to idle radio resources. For example, the radio resource corresponding to the first radio resource configuration is a resource, recorded as radio resource A. If the radio resource that the target cell can currently allocate to the UE, i.e., the idle radio resources in the target cell include radio resource A, then it is determined that the same radio resource A as the source cell can be allocated to the UE, and the UE can continue to use the first radio resource configuration in the target cell. It should be noted that the target cell continues to use the first radio resource configuration, which can also be understood as the target cell allocating the radio resource corresponding to the first radio resource configuration to the UE. Exemplarily, the radio resource configuration includes the configuration of a Cell-Radio Network Temporary Identifier (C-RNTI), a channel sounding reference signal (SRS) resource, and a physical uplink control channel (PUCCH) resource.

[0101] S102. If the first base station determines that the UE can use the first wireless resource configuration in the second cell, the first base station sends a first switching command to the UE, where the first switching command is used to instruct the UE to use the first wireless resource configuration in the second cell.

[0102] Exemplarily, if the wireless resources in the first wireless resource configuration are not occupied by other devices, that is, the wireless resources in the first wireless resource configuration are idle, then the UE is allowed to continue to use the first wireless resource configuration, and the target cell does not need to reallocate wireless resources for the UE, nor does it need to reconfigure the wireless resources. When the UE receives the first switching command, it can determine that the first base station agrees that it can continue to use the first wireless resource configuration in the target cell after switching to the target cell, or inherit the first wireless resource configuration, based on the fact that the first switching command does not carry a new wireless resource configuration. The UE only needs to update the current serving cell to the second cell, such as replacing the PCI of the current serving cell with the PCI of the second cell, thereby reducing the transmission overhead of reconfiguring the wireless resources and reducing the network overhead.

[0103] Optionally, the first handover command may be a L1 or L2 handover command, for example, the first handover command is a medium access control (MAC) layer control element or a physical downlink control channel (PDCCH).

[0104] Figure 5 is a flow chart of another cell switching method provided in an embodiment of the present application, such as Figure 5 As shown, based on Figure 4 The method further includes S103, which is executed after S101.

[0105] S103. If the first base station determines that the UE cannot use the first wireless resource configuration in the second cell, it sends a second switching command to the UE, where the second switching command carries the second wireless resource configuration, where the second wireless resource configuration is allocated to the UE by the second cell.

[0106] Exemplarily, the wireless resource in the first wireless resource configuration is a wireless resource group, called wireless resource A. If the wireless resource A in the second cell, i.e., the target cell, is fully occupied or partially occupied by other devices, the UE is not allowed to continue to use the first wireless resource configuration in the target cell, and the target cell reallocates wireless resources to the UE, and obtains the second wireless resource configuration accordingly. The first base station generates a second handover command, and the second handover command carries the second wireless resource configuration. After receiving the second handover command, the UE reconfigures according to the second wireless resource configuration.

[0107] Optionally, the first base station and the UE may pre-agree or determine the type of the handover command according to protocol provisions, for example, if the handover command carries the second wireless resource configuration, it means that the handover command is the second handover command, which means that the first base station determines that the UE cannot continue to use the first wireless resource configuration in the target cell; if the handover command does not carry the second wireless resource configuration, it means that the handover command is the first handover command, which means that the first base station determines that the UE can continue to use the first wireless resource configuration in the target base station. In this way, it is indicated whether the wireless resource configuration needs to be reconfigured, and there is no need to indicate whether the wireless resource configuration needs to be reconfigured separately, which can save transmission overhead.

[0108] Optionally, before receiving the switching command (including the first switching command or the second switching command), the UE can also obtain random configuration information for the UE to switch to the second cell, i.e., the target cell, from the first cell, i.e., the source cell, and the UE can access the target cell through the random configuration information.

[0109] Optionally, the second handover command may be an L3 handover command, for example, the second handover command is a Radio Resource Control (RRC) message.

[0110] based on Figure 4 and Figure 5In the method, the first base station may also carry an identifier of the target cell in the first switching command or the second switching command, to instruct the UE to switch from the first cell to the target cell (i.e., the second cell). Optionally, the first switching command does not need to carry other information. For example, in a scenario where the first cell and the second cell are both service cells of the first base station, the first base station sends a first switching command to the UE, and the UE switches to the second cell according to the identifier of the second cell in the first switching command. To continue using the first wireless resource configuration in the second cell, the UE only needs to update the current service cell to the second cell, such as replacing the PCI of the current service cell with the PCI of the second cell. Alternatively, the first base station sends a second switching command to the UE, and the UE switches to the second cell according to the identifier of the second cell in the second switching command, and reconfigures the wireless resources according to the second wireless resource configuration carried by the second switching command.

[0111] In one possible implementation, the source cell and the target cell belong to the same base station, such as the first base station shown in the above example. In another possible implementation, the source cell and the target cell belong to different base stations, respectively. In the embodiment of the present application, the third cell is the service cell of the second base station, the second cell is the service cell of the first base station, and the UE needs to be switched from the third cell of the second base station to the second cell. The third cell is the source cell, and the second cell is the target cell. Figure 6 is a flow chart of another cell switching method provided in an embodiment of the present application, such as Figure 6 As shown, the method is applied in a first base station, a second base station and a UE, and the method includes: S201 to S212.

[0112] S201. The second base station sends a handover request to the first base station.

[0113] The cell currently accessed by the UE is the third cell of the second base station, and the UE uses the third radio resource configuration allocated to the UE by the third cell in the third cell. If the UE needs to switch from the third cell to the second cell, the third cell is regarded as the source cell, and the second cell is regarded as the target cell. The second base station can send a handover request to the first base station, and the handover request is used to request the UE to continue to use the third radio resource configuration in the second cell.

[0114] Optionally, the handover request may carry indication information, where the indication information is used to request that the UE be handed over to the second cell and that the third wireless resource configuration needs to continue to be used, or to request to inherit the third wireless resource configuration of the third cell.

[0115] S202. The first base station receives a handover request, and determines, based on the third wireless resource configuration requested in the handover request, whether the second cell can allocate the same wireless resource configuration as in the third wireless resource configuration to the UE.

[0116] If yes, execute step S203; if no, execute step S207.

[0117] S203: When the first base station determines that the third radio resource configuration can be used in the second cell, it sends a first switching request confirmation to the second base station, where the first switching request confirmation is used to instruct the UE to use the third radio resource configuration in the second cell.

[0118] For example, the first switching request confirmation carries indication information, instructing the UE to use the third radio resource configuration in the second cell.

[0119] Optionally, if the second cell can allocate wireless resources to the UE that are the same as the wireless resources in the third wireless resource configuration, that is, if it is determined that the UE can use the third wireless resource configuration in the second cell, the first switching request confirmation can instruct the UE to adopt the current third wireless resource configuration unchanged, or instruct the UE to inherit the third wireless resource configuration.

[0120] S204: The second base station receives confirmation of the first switching request.

[0121] S205. The second base station sends a first handover command to the UE according to the received first confirmation request.

[0122] Optionally, the second base station may send an L1 or L2 handover command to the UE as the first handover command, and the first handover command indicates the identifier of the second cell, such as the PCI of the second cell. Since the UE can continue to use the third wireless resource configuration, the first handover command does not carry the wireless resource configuration (because it is the same as the third wireless resource configuration, it can be inherited), and there is no need to reconfigure the wireless resource, thereby reducing network overhead.

[0123] In the actual use scenario, the first handover command is a command carrying a first identifier and indicating an identifier of the second cell for the source base station and the UE. In the embodiment of the present application, when the source cell and the target cell are the service base stations of the same base station, the inherited wireless resource configuration is the first wireless resource configuration, and the first handover command instructs the UE to inherit the first wireless resource configuration. When the source cell and the target cell are the service base stations of different base stations, the inherited wireless resource configuration is the third wireless resource configuration, and the first handover command instructs the UE to inherit the third wireless resource configuration. This is a distinction, but it does not mean that the first handover command is a different command in different scenarios. For the source base station and the UE, the first handover command is used to instruct the UE to inherit the current wireless resource configuration, and the second handover command is used to instruct the UE to reconfigure the wireless resources according to the wireless resources reallocated by the target cell.

[0124] S206. The UE receives the first switching command, and according to the first switching command, continues to use the third radio resource configuration, and updates the cell identifier.

[0125] The third wireless resource configuration provided in the embodiment of the present application does not include a cell identifier, such as a PCI, and the PCI is indicated by the first identifier carried by the first switching command; or, the third wireless resource configuration includes a cell identifier, but after the UE receives the first switching command, it continues to use the third wireless resource configuration according to the first switching command, and modifies the PCI in the third wireless resource configuration to the PCI of the second cell. In this method of cell switching, the UE does not need to be reconfigured, and only needs to update the PCI of the third cell to the PCI of the second cell, thereby reducing the overhead caused by the transmission of configuration signaling in the network.

[0126] S207: The first base station determines that the UE cannot use the third radio resource configuration in the second cell, and the second cell reallocates radio resources to the UE to obtain the second radio resource configuration.

[0127] Optionally, if the wireless resource in the third wireless resource configuration is called wireless resource B, when the second cell allocates wireless resources to the UE, if the wireless resource B of the second cell is partially or completely occupied, then the first base station determines that the UE cannot use the third wireless resource configuration in the second cell, and the second cell reallocates wireless resources to the UE based on currently idle wireless resources to obtain a second wireless resource configuration. For example, the second wireless resource configuration generated by the second cell may be an RRC reconfiguration message, etc.

[0128] S208. The first base station sends a second handover request confirmation to the second base station, where the second handover request confirmation instructs the UE to use the second radio resource configuration in the second cell.

[0129] For example, the second switching request confirmation carries indication information, indicating that the UE does not use the third radio resource configuration in the second cell.

[0130] The second switching request confirmation carries the second radio resource configuration.

[0131] S209: The second base station receives the second handover request confirmation, and generates a second handover command according to the second confirmation request.

[0132] The second handover command is used to instruct the UE to use the second radio resource configuration in the second cell.

[0133] S210. The second base station sends a second switching command to the UE.

[0134] Exemplarily, the second switching command carries the second radio resource configuration and an identifier of the second cell, which may be a PCI.

[0135] S211. The UE receives a second switching command, switches to a second cell according to the second switching command, uses a second wireless resource configuration in the second cell, and re-updates the wireless resource configuration.

[0136] In the scenario provided in this example, the current cell is the third cell.

[0137] S212 is executed after S206 and S211.

[0138] S212. UE accesses the second cell.

[0139] Optionally, before receiving the switching command (including the first switching command or the second switching command), the UE can obtain random configuration information for the UE to switch to the second cell from the third cell of the second base station, and the UE can access the second cell according to the random configuration information and the switching command.

[0140] Optionally, the UE may also access the second cell according to the switching command by adopting a random access-free method.

[0141] Exemplarily, the handover command may be a first handover command or a second handover command, and the handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, such as a PCI of the second cell.

[0142] In the cell switching method provided in the embodiment of the present application, if the first base station determines that the UE can continue to use the third wireless resource configuration allocated to the UE by the third cell in the target cell, i.e., the second cell, the UE only needs to update the PCI of the source cell to the PCI of the target cell according to the PCI of the target cell indicated by the switching command, and can continue to communicate without reconfiguring the wireless resources when switching the cell, that is, it can reduce the overhead caused by reconfiguring the wireless resources between the devices in the network.

[0143] The cell switching method provided in the embodiment of the present application can be applied in the satellite communication scenario of the following example, and the satellite communication scenario includes a transparent architecture and a regeneration architecture. In the transparent architecture, the base station is located on the ground behind the gateway, and the satellite is mainly used as a repeater, and can perform radio frequency (RF) processing, such as frequency conversion, amplification and beam management. In the regeneration architecture, the satellite carries the entire base station or part of the functions of the base station, for example, data packets can be decoded and processed on the satellite. Due to the ability to support inter-satellite links (ISL), the regeneration architecture is more flexible, has a wider coverage and better performance. In the embodiment of the present application, several satellite communication scenarios are cited to correspond to the description of the role of the satellite in the above-mentioned cell switching method, but these scenarios are only examples and are not limited to this.

[0144] Figure 7is a schematic diagram of a transparent architecture of a satellite communication network provided in an embodiment of the present application, such as Figure 7 As shown, the architecture 200 includes a base station 10, a UE 20, a satellite 30 and a core network device 40. The architecture 200 is a transparent satellite architecture. The functions of the satellite 30 include: radio frequency filtering, frequency conversion and amplification, that is, the satellite 30 mainly acts as an L1 relay to regenerate the physical layer signal and does not have other higher protocol layers. That is to say, in the cell switching method provided in the embodiment of the present application, the satellite 30 can be used as the L1 of the base station (including any one or both of the first base station or the second base station in the above example) to realize transmission.

[0145] Figure 8 is a schematic diagram of a regeneration architecture of a satellite communication network provided in an embodiment of the present application, such as Figure 8 As shown, the architecture 300 includes a UE 20, a satellite 30, and a core network device 40. In the regeneration architecture 300, there is no regeneration satellite of ISL, and the satellite 30 has the processing function of a base station. That is, in the cell switching method provided in the embodiment of the present application, the satellite 30 can be used as a base station (including any one or both of the first base station or the second base station in the above example).

[0146] Fig. 9 FIG. 1 is a schematic diagram of another satellite communication network regeneration architecture provided in an embodiment of the present application. Fig. 9 As shown, a base station 10, a UE 20, a satellite 30 and a core network device 40 are included. The regeneration architecture 400 has an ISL, and the satellite 30 has a processing function of a base station. That is, in the cell switching method provided in the embodiment of the present application, the satellite 30 can be used as a base station (including any one or both of the first base station or the second base station in the above example).

[0147] Fig.10 FIG. 1 is a schematic diagram of another satellite communication network regeneration architecture provided in an embodiment of the present application. Fig.10 As shown, a base station 10, a UE 20, a satellite 30 and a core network device 40 are included. In the regeneration architecture 500, an ISL is provided, and the satellite 30 has a DU processing function of a base station (gNB). Fig.10 That is to say, in the cell switching method provided in the embodiment of the present application, the satellite 30 can be used as a base station (including any one or both of the first base station or the second base station in the above example) to implement the DU processing function, and the base station 10 can implement the CU processing function of the base station. Fig.10 In the figure, it is shown as gNB-CU.

[0148] Optionally, the architecture of the satellite communication network may also be that the satellite has a new networking architecture capability of a base station (Integrated Access And Backhual, IAB). That is to say, in the cell switching method provided in the embodiment of the present application, the satellite 30 can be used as the IAB of the base station to provide better network coverage and capacity.

[0149] Fig.11 is a flow chart of another cell switching method provided in an embodiment of the present application, such as Fig.11 As shown, this method is based on Figure 6 The provided method is applied in the first base station, the second base station and the UE. The method is executed before S201 and also includes: S213 to S216.

[0150] S213: The second base station sends a negotiation request for wireless resource allocation to the first base station, where the negotiation request is used to indicate a resource allocation rule.

[0151] Optionally, the first base station may also send the negotiation request to the second base station to indicate the resource allocation rule. The embodiment of the present application is illustrated by taking the second base station sending the request to the first base station as an example, but is not limited thereto.

[0152] For example, the resource pool of each cell may include multiple types of wireless resources, such as C-RNTI, SRS and PUCCH resources. Each cell can divide these wireless resources into multiple resource groups. The embodiment of the present application takes the same number of resource groups divided in each cell as an example, such as each cell includes 5 resource groups, 100 resource groups, etc. Each resource group may contain the same type of wireless resources or cross-type wireless resources (for example, including multiple types of wireless resources).

[0153] The resource allocation rules can be determined as different resource allocation rules according to the requirements of the actual usage scenario. The examples are as follows:

[0154] Example 1: The resource allocation rule is based on the rules set for each cell.

[0155] In a possible implementation, the resource allocation rule may be set for cells along the direction of the satellite moving orbit. Figure 4, cell 1 is the service cell of satellite 1, cell 2 is the service cell of satellite 2, assuming that UE 1 is stationary in cell 2, when the satellite moves, the satellite's moving trajectory is from satellite 1 to the position of satellite 2, and UE 1 needs to switch from cell 1 to cell 2. Assuming that each cell has five groups of resources that can be allocated to UE, the order of the cells in the direction of the satellite moving orbit can be followed, and each cell uses a priority to correspond to the order of wireless resource allocation. For example, the five groups of resources are recorded as resource group 1, resource group 2, resource group 3, resource group 4 and resource group 5, respectively. Then the resource allocation rule of cell 1 is that the allocation order from high priority to low is: resource group 2, resource group 3, resource group 4, resource group 5 and resource group 1; the resource allocation rule of cell 2 is that the allocation order from high priority to low is: resource group 1, resource group 2, resource group 3, resource group 4 and resource group 5. When UE1 has been allocated resource group 1 by cell 2 and wireless resource configuration has been performed, such as the first wireless resource configuration. When satellite 1 has not moved and covered the UE, cell 1 may provide wireless resources for other UEs. According to the resource allocation rule of cell 1, wireless resources of resource group 2, resource group 3 and resource group 4 will be preferentially allocated to other UEs, such as UE 2, UE 3 and UE 4. When satellite 1 moves and UE 1 needs to access cell 1, resource group 1 of cell 1 is idle, resource group 1 is allocated to UE 1, and UE 1 can inherit the first wireless resource configuration. Since the priority order of resource groups is different in the resource allocation rules of each cell on the satellite moving track, when the UE switches cells, the wireless resources allocated to it are more likely to be idle, which can increase the possibility of inheriting the wireless resource configuration.

[0156] In a possible implementation, the resource allocation rule may be set according to the PCI of each cell. Assuming that there are N cells in total, the PCI of each cell is represented by I (generally speaking, the PCIs of two adjacent cells are different). The resource allocation rule may be that the resource group with the highest priority in each cell is the resource group with I mod N = a (such as a = 0), that is, each cell gives priority to the resource group with I mod N = a. If the resource group is occupied, the resource group with I mod N = a + 1 is used, and so on. The embodiment of the present application still takes the example that each cell has five groups of resources that can be allocated to the UE, and the five groups of resources are respectively recorded as resource group 1, resource group 2, resource group 3, resource group 4 and resource group 5. For example, for the cell with I = i, which is cell 3, the resource group with the highest priority in cell 3 is i mod 5 = 0, and resource group 1 has the highest priority. After calculation in sequence, it is assumed that the cell with PCI = i, that is, the resource groups of cell 3 are allocated in the order of priority from high to low: resource group 1, resource group 2, resource group 3, resource group 5 and resource group 4. According to this calculation method, each cell can calculate its allocation order from high to low priority according to the PCI. Since the PCIs of adjacent cells are different, the calculated allocation order from high to low priority may also be different. Therefore, referring to the above example, when the UE switches cells (usually switches to an adjacent cell), in the target cell, the wireless resources allocated to the UE by the source cell are more likely to be idle, which can increase the possibility of inheriting the wireless resource configuration.

[0157] Example 2: The resource allocation rule is based on the rules set for each physical area.

[0158] Assume that the trajectory of satellite movement includes three physical areas, which are denoted as physical area 1, physical area 2 and physical area 3, and each physical area corresponds to a cell. Each physical area sets a priority corresponding to the order of wireless resource allocation. For example, the resource pool of each physical area includes five groups of resources, which are denoted as resource group 1, resource group 2, resource group 3, resource group 4 and resource group 5. Then the resource allocation rule of physical area 1 is that the allocation order from high priority to low is: resource group 2, resource group 3, resource group 4, resource group 5 and resource group 1; the resource allocation rule of physical area 2 is that the allocation order from high priority to low is: resource group 1, resource group 2, resource group 3, resource group 4 and resource group 5; the resource allocation rule of physical area 3 is that the allocation order from high priority to low is: resource group 3, resource group 4, resource group 5, resource group 1 and resource group 2.

[0159] In one possible implementation, for Figure 3In this deployment scenario where the identifier of each cell is bound to the physical area, such as physical area 1 corresponds to cell 1, physical area 2 corresponds to cell 2, and physical area 3 corresponds to cell 3, the resource allocation rule for cell 1 is that the allocation order from high priority to low is: resource group 2, resource group 3, resource group 4, resource group 5 and resource group 1; the resource allocation rule for cell 2 is that the allocation order from high priority to low is: resource group 1, resource group 2, resource group 3, resource group 4 and resource group 5, and the resource allocation rule for cell 3 is that the allocation order from high priority to low is: resource group 3, resource group 4, resource group 5, resource group 1 and resource group 2.

[0160] In one possible implementation, for Figure 4 In this deployment scenario where the identifier of each cell is bound to the satellite, when the satellite moves, the satellite cell, such as cell 4, corresponds to physical area 1. Fig.12 As shown in the first and second rows, the resource allocation rule of cell 4 is that the allocation order from high priority to low priority is: resource group 2, resource group 3, resource group 4, resource group 5 and resource group 1. When the satellite moves and cell 4 corresponds to physical area 2, the resource allocation rule of cell 4 is that the allocation order from high priority to low priority is: resource group 1, resource group 2, resource group 3, resource group 4 and resource group 5. Furthermore, due to the movement of the satellite, cell 4 may be partially in physical area 1 and partially in physical area 2. For this situation, a time point T can be set. Before the time point, cell 4 corresponds to the resource pool of physical area 1. The resource allocation rule of cell 4 can be changed as the satellite moves. Fig.12 As an example, when a small part of cell 4 moves to physical area 2 and most of it is in physical area 1, that is, in the scenario of the third row, the resource allocation rule may be: cell 4 is in (such as Fig.12 The UEs in the range to the left of the vertical line in the middle are allocated wireless resources in the resource pool of physical area 1 in the descending order of resource group priority. Fig.12 UEs in the range to the right of the vertical line in the middle) are allocated wireless resources outside the resource pool of physical area 2; from time T, half of cell 4 moves to physical area 2 and the other half is in physical area 1, that is, in the scenario of the fourth row, the resource allocation rule can be that cell 4 is in (such as Fig.12 UEs in the range to the left of the vertical line are allocated wireless resources outside the resource pool of physical area 1. Fig.12 For UEs within the range to the right of the middle vertical line), wireless resources are allocated in the resource pool of physical area 2 in the order of resource group priority from high to low. Fig.12The allocation method is only an example. In the embodiment of the present application, by setting different priority orders of resource groups in two adjacent physical areas, when the satellite moves to different physical areas, the resource allocation rules corresponding to the cells it is bound to are also different. When the UE switches cells, the wireless resources it has allocated are more likely to be idle, which can increase the possibility of the UE inheriting the wireless resource configuration.

[0161] Example 3: Resource allocation rules can be randomly allocated

[0162] The embodiment of the present application also provides a resource allocation rule, such as each cell includes five resource groups, then each cell can randomly obtain the priority order of the resource groups. The resource allocation rule obtained by this random allocation method can effectively avoid the situation that each cell allocates wireless resources in the order of the resource group numbers from small to large. If each cell uniformly allocates wireless resources in the order from small to large, when UE 1 accesses cell 1, cell 1 will give priority to allocating resource group 1 to UE 1, and when UE 2 accesses cell 2, cell 2 will also first allocate resource group 1 to UE 1. In this case, if UE 1 needs to access cell 2, resource group 1 has been occupied by UE 2, UE 1 can no longer use resource group 1, and can not inherit the wireless resource configuration of resource group 1. Therefore, random allocation makes it possible for each cell to allocate resource groups to UEs in different orders, reducing the possibility of wireless resources that need to be inherited being occupied, thereby increasing the possibility of UE inheriting wireless resource configuration.

[0163] In the resource allocation rules of the above example of the embodiment of the present application, only the priority order of the resource groups in the resource pool is listed. In the actual use scenario, each cell can still use other wireless resources outside the resource pool. That is, for a cell, the wireless resources that can be used by the cell are still all wireless resources. The embodiment of the present application only stipulates the priority of the allocation of each wireless resource. Optionally, the wireless resources outside the resource pool can be sorted in priority order with reference to the above example, and allocated according to the priority order, etc., and the embodiment of the present application will not be elaborated. For example, the priority of the resource pool is resource group 1, resource group 2, resource group 3, resource group 4, and resource group 5. When the wireless resources in resource group 1 are occupied or used up, the cell can give priority to the resources in resource group 2. When the wireless resources in resource group 2 are occupied or used up, the cell gives priority to the wireless resources in resource group 3, and so on.

[0164] S214. The first base station determines, according to the resource allocation rule, that the UE uses the third radio resource configuration or the second radio resource configuration in the second cell.

[0165] exist Figure 6In the method shown, the wireless resource in the third wireless resource configuration is wireless resource B. If the second cell of the first base station can determine the resource allocation rule according to the negotiation request and determine that the wireless resource B in its corresponding wireless resource is idle, then it is determined that the UE uses the third wireless resource configuration in the second cell. If the second cell of the first base station can determine the resource allocation rule according to the negotiation request and determine that the wireless resource B in its corresponding wireless resource is occupied, then according to the resource allocation rule in the above example, the resource group used by the UE in the second cell is determined, the resource group is allocated to the UE, and the second wireless resource configuration is obtained.

[0166] S215. The second base station uses a resource allocation rule to determine that the UE uses a third radio resource configuration in a third cell.

[0167] Before S215, the first base station sends a handover request to the second base station, requesting the UE to handover to the third cell. Figure 6 The description in will not be repeated here.

[0168] Optional, in Figure 6 In the scenario shown, the second base station can determine that the UE uses the third wireless resource configuration in the third cell according to the resource allocation rule. If the third cell of the second base station determines that the wireless resource corresponding to it is idle according to the resource allocation rule determined by the negotiation request, the wireless resource of the third wireless resource configuration is wireless resource B.

[0169] The negotiation request provided in the embodiment of the present application can enable the base stations of each cell to negotiate and obtain the same resource allocation rules. Each cell allocates wireless resources to the UE according to the resource allocation rules, and the possibility of obtaining the same wireless resource configuration is greater. When the cell is switched, the possibility of inheriting the third wireless resource can be increased, thereby reducing network overhead.

[0170] In one possible implementation, based on Figure 4 or Figure 5 In the provided cell switching method, the first cell can determine, according to the resource allocation rule pre-stored by the first base station, that the UE uses the first wireless resource configuration in the first cell; the second cell can determine, according to the resource allocation rule pre-stored by the first base station, that the UE uses the first wireless resource configuration or the second wireless resource configuration in the second cell. The method refers to the example of S214 (S214 takes determining whether the UE uses the third wireless resource configuration or the second wireless resource configuration in the second cell as an example), and no further details are given.

[0171] The pre-stored resource allocation rules provided in the embodiment of the present application can enable each cell to allocate wireless resources to the UE according to the same resource allocation rules, thereby increasing the possibility of obtaining the same wireless resource configuration and increasing the possibility of inheriting the first wireless resource when switching cells, thereby reducing network overhead.

[0172] Fig.13 is a schematic diagram of the structure of a first base station provided in an embodiment of the present application, such as Fig.13 As shown, the first base station 10 includes: a processing module 101 and a sending module 102 .

[0173] Fig.13 The provided first base station can be used in a scenario where both the source cell and the target cell are service cells of the first base station, and the identifier of the target cell is different from the identifier of the source cell, wherein the source base station is the first cell and the target base station is the second cell.

[0174] The processing module 101 is used to determine whether the UE can use a first wireless resource configuration in the second cell if it is determined that the UE needs to switch from the first cell to the second cell, wherein the first wireless resource configuration is allocated to the UE by the first cell.

[0175] For example, the first cell and the second cell may both be service cells of the first base station.

[0176] The sending module 102 is used to send a first switching command to the UE if the processing module 101 determines that the UE can use the first wireless resource configuration in the second cell, where the first switching command is used to instruct the UE to use the first wireless resource configuration in the second cell.

[0177] In one possible implementation, the sending module 102 is also used to send a second switching command to the UE if the processing module 101 determines that the UE cannot use the first wireless resource configuration in the second cell, and the second switching command carries the second wireless resource configuration, wherein the second wireless resource configuration is allocated to the UE by the second cell.

[0178] In one possible implementation, based on Fig.13 In the provided scenario, the processing module 101 is specifically used to determine, according to a pre-stored resource allocation rule, whether the UE uses the first wireless resource configuration or the second wireless resource configuration in the second cell.

[0179] It should be understood that Fig.13 The modules shown are only examples, and the processing module 101 and the sending module 102 may perform their operations with reference to the method part in the embodiments of the present application, or perform variations of their operations.

[0180] Fig.14 is a schematic diagram of the structure of another first base station provided in an embodiment of the present application, such as Fig.14 As shown, the first base station 10 further includes: a receiving module 103 . Fig.14 The provided first base station can be applied in a scenario where the target cell is the second cell of the first base station, the source cell is the third cell of the second base station, and the identifier of the target cell is different from the identifier of the source cell.

[0181] The receiving module 103 is used to receive a switching request. The switching request is sent by the second base station when the UE needs to switch from the third cell of the second base station to the second cell. The switching request is used to request the UE to use the third wireless resource configuration in the second cell. The third wireless resource configuration is allocated to the UE by the third cell.

[0182] The sending module 102 is also used to send a first switching request confirmation to the second base station if the processing module 101 determines that the UE can use the third wireless resource configuration in the second cell. The first switching request confirmation is used to instruct the UE to use the third wireless resource configuration in the second cell, so that the second base station sends a first switching command to the UE.

[0183] The sending module 102 is also used to send a second switching request confirmation to the second base station if the processing module 101 determines that the UE cannot use the third wireless resource configuration in the second cell. The second switching request confirmation is used to instruct the UE to use the second wireless resource configuration in the second cell, so that the second base station sends a second switching command to the UE.

[0184] In one possible implementation, for Fig.14 In this example scenario, the first handover command may instruct the UE to inherit the third wireless resource configuration. For example, the first handover command carries a first identifier for indicating the identifier of the second cell. When the UE receives the handover command with only the first identifier, it can be informed to continue to use the current wireless resource configuration, that is, the third wireless resource configuration. The second handover command may carry the second wireless resource configuration and the first identifier. If the UE receives the second wireless resource configuration and the first identifier, it is informed that it needs to be reconfigured according to the second wireless resource configuration, and the identifier of the current cell is updated according to the instruction of the first identifier.

[0185] In one possible implementation, based on Fig.14 In the provided scenario, the first base station and the second base station may first negotiate to determine a resource allocation rule, and both allocate wireless resources to the UE according to the priority order of the resource allocation rule, with reference to the above example.

[0186] The receiving module 103 is further configured to receive a negotiation request sent by the second base station, where the negotiation request is used to indicate a resource allocation rule.

[0187] The processing module 101 is further configured to determine, according to a resource allocation rule, whether the UE uses the third radio resource configuration or the second radio resource configuration in the second cell.

[0188] It should be understood that Fig.14 The modules shown are only examples. The processing module 101, the sending module 102 and the receiving module 103 may perform their operations with reference to the method part in the embodiments of the present application, or perform variations of their operations.

[0189] Fig.15 is a schematic diagram of the structure of a UE provided in an embodiment of the present application, such as Fig.15 As shown, the UE 20 includes: a receiving module 201 and a processing module 202 .

[0190] The receiving module 201 is used to receive a first switching command, wherein the first switching command is used to instruct the UE to use a first wireless resource configuration in a second cell, the first wireless resource configuration is allocated to the UE by the first cell, and both the first cell and the second cell are service cells of the first base station.

[0191] The processing module 202 is configured to switch from the first cell to the second cell according to the first switching command, and use the first radio resource configuration in the second cell.

[0192] In a possible implementation, the receiving module 201 is further configured to receive a first handover command, wherein the first handover command is further configured to instruct the UE to use a third radio resource configuration in the second cell, the third radio resource configuration is allocated to the UE by the third cell, and the third cell is a serving cell of the second base station. The processing module 202 is further configured to switch from the third cell to the second cell according to the first handover command, and use the third radio resource configuration in the second cell.

[0193] In one possible implementation, the switching command carries the identifier of the second cell, wherein the switching command includes the first switching command, the second switching command or the first switching command; the processing module 202 is further used to update the identifier of the current cell with the identifier of the second cell according to the switching command.

[0194] It should be understood that Fig.15 The modules shown are only examples, and the receiving module 201 and the processing module 202 may perform their operations with reference to the method part in the embodiments of the present application, or perform variations of their operations.

[0195] Fig.16 is a schematic diagram of the structure of a second base station provided in an embodiment of the present application, such as Fig.16 As shown, the second base station 50 includes: a sending module 501, a processing module 502 and a receiving module 503.

[0196] Fig.16The provided second base station 50 can be applied in a scenario where the target cell is the second cell of the first base station, the source cell is the third cell of the second base station, and the identifier of the target cell is different from the identifier of the source cell. Fig.14 A first base station 10 is provided.

[0197] The sending module 501 is used to send a switching request to the first base station if the processing module 502 determines that the UE needs to be switched from the third cell to the second cell. The switching request is used to request the UE to use the third wireless resource configuration in the second cell. The third wireless resource configuration is allocated to the UE by the third cell. The third cell is the service cell of the second base station, and the second cell is the service cell of the first base station.

[0198] The sending module 501 is also used to send a first switching command to the UE if the receiving module 503 receives a first switching request confirmation, the first switching request confirmation is used to instruct the second base station to use the third wireless resource configuration in the second cell, and the first switching command is used to instruct the UE to use the third wireless resource configuration in the second cell.

[0199] In one possible implementation, the sending module 501 is also used to send a second switching command to the UE if the receiving module 503 receives a second switching request confirmation, and the second switching request confirmation is used to instruct the second base station to use the second wireless resource configuration in the second cell. The second switching command carries the second wireless resource configuration, and the second wireless resource configuration is allocated to the UE by the second cell.

[0200] In a possible implementation manner, the handover command carries the identifier of the second cell, and is used to instruct the UE to update the identifier of the current cell with the identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

[0201] In a possible implementation, the sending module 501 is further configured to send a negotiation request to the first base station, where the negotiation request is used to indicate a resource allocation rule.

[0202] The processing module 502 is further configured to determine, according to the resource allocation rule, that the UE uses a third radio resource configuration in the third cell.

[0203] It should be understood that Fig.16 The modules shown are only examples, and the sending module 501, the processing module 502 and the receiving module 503 may perform their operations with reference to the method part in the embodiments of the present application, or perform variations of their operations.

[0204] In addition, if Fig.17 As shown, Fig.17 It is a schematic diagram of the structure of the device 60 according to an embodiment of the present application. Fig.17The device 60 shown includes a transceiver unit 601 and a processing unit 602. The device 60 can be used to execute the methods S101 and S102, S101 to S103, S201 to S212, or S213 to S216 in the above embodiments. When the device 60 is used to execute the method in the above embodiment, the device 60 is equivalent to the first base station, or UE, or the second base station exemplified in the method.

[0205] It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. The functional units in the embodiments of the present application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. For example, in the above embodiment, the transceiver unit 601 and the processing unit 602 can be the same unit or different units; the transceiver unit 601 and the processing unit 602 can be the same unit or different units. The above-mentioned integrated units can be implemented in the form of hardware, such as a chip, or in the form of software functional units.

[0206] In addition, the present application embodiment also provides a device 70, see Fig.18 As shown, Fig.18: is a schematic diagram of the structure of the device 70 of the embodiment of the present application. The device 70 may include a processor 701, a memory 702 coupled to the processor 701, and a transceiver 703. The transceiver 703 may be a communication interface, an optical module, etc., for receiving messages or data information, etc. The processor 701 may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and a NP, for executing the forwarding processing related steps in the device exemplified in the above embodiment. The processor may also be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof. The processor 701 may refer to one processor or may include multiple processors. The memory 702 may include a volatile memory, such as a random access memory (RAM); the memory may also include a non-volatile memory, such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); the memory 702 may also include a combination of the above-mentioned types of memories. The memory 702 may refer to a memory, or may include multiple memories for storing program instructions. In one embodiment, the memory 702 stores computer-readable instructions, and the computer-readable instructions include multiple software modules, such as a sending module, a radio resource control module and a receiving module. After executing each software module, the processor 701 may perform corresponding operations according to the instructions of each software module. In this embodiment, the operation performed by a software module actually refers to the operation performed by the processor 701 according to the instructions of the software module. Optionally, the processor 701 may also store program codes or instructions for executing the embodiments of the present application. In this case, the processor 701 does not need to read the program codes or instructions from the memory 702.

[0207] The device 70 can be used to execute the method in the above embodiment. Specifically, the device 70 can be used as a first base station to execute the operations in methods S101 to S102, or S101 to S103, or S201 to S212, or S213 to S216. For example, the processor 702 can be used to determine whether the UE can use the first wireless resource configuration in the second cell if it is determined that the UE needs to switch from the first cell to the second cell, wherein the first wireless resource configuration is allocated to the UE by the first cell, and the first cell and the second cell are both service cells of the first base station; the communication interface 701 can be used to send a first switching command to the UE if the UE can use the first wireless resource configuration in the second cell, and the first switching command is used to instruct the UE to use the first wireless resource configuration in the second cell.

[0208] Alternatively, the device 70 may perform the operations in methods S201 to S212, or S213 to S216 as a UE. For example, the communication interface 701 is used to receive a first handover command, wherein the first handover command is used to instruct the UE to use a first wireless resource configuration in the second cell, the first wireless resource configuration is allocated to the UE by the first cell, and the first cell and the second cell are both service cells of the first base station; the processor 702 is used to switch from the first cell to the second cell according to the first handover command, and use the first wireless resource configuration in the second cell.

[0209] Alternatively, the device 70 may perform the operations in methods S201 to S212, or S213 to S216 as a second base station. For example, the communication interface 701 is used to send a handover request to the first base station if the processor 702 determines that the UE needs to be handed over from the third cell to the second cell, the handover request is used to request the UE to use the third wireless resource configuration in the second cell, the third wireless resource configuration is allocated to the UE by the third cell, the third cell is the service cell of the second base station, and the second cell is the service cell of the first base station; if the first handover request confirmation is received, a first handover command is sent to the UE, the first handover request confirmation is used to instruct the second base station to use the third wireless resource configuration in the second cell, and the first handover command is used to instruct the UE to use the third wireless resource configuration in the second cell.

[0210] The present application also provides a system, see Fig.19 As shown, Fig.19 600 is a schematic diagram of a structure of a system 600 provided in an embodiment of the present application. The system 600 may include a first base station 10 and a UE 20. The structure of the first base station 10 is shown in FIG. Fig.13 , Fig.17 and Fig.18 , the structure of UE 20 refers to Fig.14 , Fig.17 and Fig.18The system 600 may refer to the method part in the embodiment of the present application to perform its operation, or perform a variation of its operation, such as being applicable to Figure 4-Figure 5 A method is provided, performing its operations, or performing a variation of its operations.

[0211] The present application also provides a system, see Fig. 20 As shown, Fig. 20 700 is a schematic diagram of a structure of a system 700 provided in an embodiment of the present application. The system 700 may include a first base station 10, a UE 20, and a second base station 50. The structure of the first base station 10 is shown in FIG. Fig.13 , Fig.17 and Fig.18 , the structure of UE 20 refers to Fig.14 , Fig.17 and Fig.18 The structure of the first base station 10 is shown in FIG. Fig.15 , Fig.17 and Fig.18 The system 700 may refer to the method part in the embodiment of the present application to perform its operation, or perform a variation of its operation, such as being applicable to Figure 6 and Fig.11 A method is provided, performing its operations, or performing a variation of its operations.

[0212] An embodiment of the present application also provides a computer-readable storage medium, in which instructions are stored. When the computer-readable storage medium is executed on a processor, part or all of the operations in any of the methods in any of the aforementioned embodiments are implemented.

[0213] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed on a processor, implements part or all of the operations in any of the methods in any of the aforementioned embodiments.

[0214] The present application also provides a chip, including an interface circuit and a processor. The interface circuit and the processor are connected, and the processor is used to enable the chip to perform part or all of the operations in any of the methods in any of the above embodiments.

[0215] An embodiment of the present application also provides a chip system, including: a processor, the processor is coupled to a memory, the memory is used to store programs or instructions, when the program or instructions are executed by the processor, the chip system implements part or all of the operations of any one of the methods of any one of the embodiments described above.

[0216] Optionally, the processor in the chip system may be one or more. The processor may be implemented by hardware or by software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc. When implemented by software, the processor may be a general-purpose processor implemented by reading software code stored in a memory.

[0217] Optionally, the memory in the chip system may also be one or more. The memory may be integrated with the processor or may be separately arranged with the processor, which is not limited in the embodiments of the present application. Exemplarily, the memory may be a non-transient processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip or may be arranged on different chips respectively. The embodiments of the present application do not specifically limit the type of memory and the arrangement of the memory and the processor.

[0218] Exemplarily, the chip system can be an FPGA, an ASIC, a system on chip (SoC), a CPU, an NP, a digital signal processing circuit (DSP), a microcontroller (MCU), a programmable logic device (PLD) or other integrated chips.

[0219] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0220] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0221] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical business division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0222] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0223] In addition, each business unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software business units.

[0224] If the integrated unit is implemented in the form of a software business unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the technical solution of the present application can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, Random Access Memory, disk or CD-ROM and other media that can store program codes.

[0225] Those skilled in the art should be aware that in one or more of the above examples, the services described in this application can be implemented with hardware, software, firmware, or any combination thereof. When implemented using software, these services can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. Storage media can be any available media that a general or special-purpose computer can access.

[0226] The above specific implementation methods further describe in detail the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above are only specific implementation methods of the present application.

[0227] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cell switching method, characterized in that: The method is applied in a first base station, comprising: If it is determined that the user equipment UE needs to be handed over from the first cell to the second cell, determining whether the UE can use a first radio resource configuration in the second cell, wherein the first radio resource configuration is allocated to the UE by the first cell; If the UE can use the first wireless resource configuration in the second cell, a first switching command is sent to the UE, where the first switching command is used to instruct the UE to use the first wireless resource configuration in the second cell.

2. The method according to claim 1, characterized in that: Also includes: If the UE cannot use the first wireless resource configuration in the second cell, a second switching command is sent to the UE, where the second switching command carries a second wireless resource configuration, wherein the second wireless resource configuration is allocated to the UE by the second cell.

3. The method according to claim 1 or 2, characterized in that: Also includes: receiving a handover request, where the handover request is sent by the second base station when the UE needs to be handed over from the third cell to the second cell, and the handover request is used to request the UE to use a third radio resource configuration in the second cell, where the third radio resource configuration is allocated by the third cell to the UE; If the UE can use the third radio resource configuration in the second cell, sending a first handover request confirmation to the second base station, where the first handover request confirmation is used to instruct the UE to use the third radio resource configuration in the second cell, so that the second base station sends the first handover command to the UE, where the first handover command is also used to instruct the UE to use the third radio resource configuration in the second cell; If the UE cannot use the third wireless resource configuration in the second cell, a second switching request confirmation is sent to the second base station, where the second switching request confirmation is used to instruct the UE to use the second wireless resource configuration in the second cell, so that the second base station sends a second switching command to the UE.

4. The method according to any one of claims 1 to 3, characterized in that: The handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

5. The method according to claim 1 or 2, characterized in that: Also includes: According to a pre-stored resource allocation rule, it is determined whether the UE uses the first radio resource configuration or the second radio resource configuration in the second cell.

6. The method according to claim 3, characterized in that: Also includes: receiving a negotiation request sent by the second base station, where the negotiation request is used to indicate a resource allocation rule; According to the resource allocation rule, it is determined that the UE uses the third radio resource configuration or the second radio resource configuration in the second cell.

7. A cell switching method, characterized in that: The method is applied in a user equipment UE, and includes: receiving a first handover command, wherein the first handover command is used to instruct the UE to use a first radio resource configuration in the second cell, and the first radio resource configuration is allocated to the UE by the first cell; According to the first switching command, switch from the first cell to the second cell, and use the first wireless resource configuration in the second cell.

8. The method according to claim 7, characterized in that Also includes: According to the first switching command, switching is performed from the third cell to the second cell, and the third wireless resource configuration is used in the second cell. The first switching command is also used to instruct the UE to use the third wireless resource configuration in the second cell. The third wireless resource configuration is allocated to the UE by the third cell.

9. The method according to claim 7 or 8, characterized in that: The handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

10. A cell switching method, characterized in that: The method is applied in a second base station, comprising: If it is determined that the user equipment UE needs to be handed over from the third cell to the second cell, a handover request is sent to the first base station, where the handover request is used to request the UE to use a third radio resource configuration in the second cell, where the third radio resource configuration is allocated to the UE by the third cell; If a first switching request confirmation is received, a first switching command is sent to the UE, wherein the first switching request confirmation is used to instruct the second base station to use the third wireless resource configuration in the second cell, and the first switching command is used to instruct the UE to use the third wireless resource configuration in the second cell.

11. The method according to claim 10, characterized in that If a second switching request confirmation is received, a second switching command is sent to the UE. The second switching request confirmation is used to instruct the second base station to use the second wireless resource configuration in the second cell. The second switching command carries the second wireless resource configuration, and the second wireless resource configuration is allocated to the UE by the second cell.

12. The method according to claim 10 or 11, characterized in that: Also includes: The handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

13. The method according to any one of claims 10 to 12, characterized in that: Also includes: Sending a negotiation request to the first base station, where the negotiation request is used to indicate a resource allocation rule; According to the resource allocation rule, it is determined that the UE uses the third radio resource configuration in the third cell.

14. A first base station, characterized in that: include: a processing module, configured to determine whether a user equipment UE can use a first radio resource configuration in the second cell if it is determined that the user equipment UE needs to be switched from the first cell to the second cell, wherein the first radio resource configuration is allocated to the UE by the first cell; A sending module is used to send a first switching command to the UE if the processing module determines that the UE can use the first wireless resource configuration in the second cell, wherein the first switching command is used to instruct the UE to use the first wireless resource configuration in the second cell.

15. The first base station according to claim 14, characterized in that: The sending module is also used to send a second switching command to the UE if the processing module determines that the UE cannot use the first wireless resource configuration in the second cell, and the second switching command carries a second wireless resource configuration, wherein the second wireless resource configuration is allocated to the UE by the second cell.

16. The first base station according to claim 14 or 15, characterized in that: Also includes: a receiving module, configured to receive a handover request, wherein the handover request is sent by the second base station when the UE needs to be handed over from the third cell to the second cell, and the handover request is used to request the UE to use a third radio resource configuration in the second cell, and the third radio resource configuration is allocated by the third cell to the UE; The sending module is further configured to send a first handover request confirmation to the second base station if the processing module determines that the UE can use the third radio resource configuration in the second cell, wherein the first handover request confirmation is used to instruct the UE to use the third radio resource configuration in the second cell, so that the second base station sends the first handover command to the UE, and the first handover command is also used to instruct the UE to use the third radio resource configuration in the second cell; The sending module is also used to send a second switching request confirmation to the second base station if the processing module determines that the UE cannot use the third wireless resource configuration in the second cell, and the second switching request confirmation is used to instruct the UE to use the second wireless resource configuration in the second cell, so that the second base station sends a second switching command to the UE.

17. The first base station according to any one of claims 14 to 16, characterized in that: The handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

18. The first base station according to claim 14 or 15, characterized in that: The processing module is specifically used to determine, according to a pre-stored resource allocation rule, whether the UE uses the first wireless resource configuration or the second wireless resource configuration in the second cell.

19. The first base station according to claim 16, characterized in that: The receiving module is further used to receive a negotiation request sent by the second base station, where the negotiation request is used to indicate a resource allocation rule; The processing module is further used to determine, according to the resource allocation rule, whether the UE uses the third wireless resource configuration or the second wireless resource configuration in the second cell.

20. A user equipment UE, characterized in that: include: A receiving module, configured to receive a first handover command, wherein the first handover command is used to instruct the UE to use a first radio resource configuration in the second cell, and the first radio resource configuration is allocated to the UE by the first cell; A processing module is used to switch from the first cell to the second cell according to the first switching command, and use the first wireless resource configuration in the second cell.

21. The UE according to claim 20, characterized in that The first handover command is further used to instruct the UE to use the third radio resource configuration in the second cell. The processing module is further used to switch from the third cell to the second cell according to the first switching command, and use the third wireless resource configuration in the second cell, where the third wireless resource configuration is allocated by the third cell to the UE.

22. The UE according to claim 20 or 21, characterized in that: The handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

23. A second base station, characterized in that: include: a sending module, configured to send a handover request to the first base station if the processing module determines that the user equipment UE needs to be handed over from the third cell to the second cell, wherein the handover request is used to request the UE to use a third radio resource configuration in the second cell, and the third radio resource configuration is allocated by the third cell to the UE; The sending module is also used to send a first switching command to the UE if the receiving module receives a first switching request confirmation, the first switching request confirmation is used to instruct the second base station that the UE uses the third wireless resource configuration in the second cell, and the first switching command is used to instruct the UE to use the third wireless resource configuration in the second cell.

24. The second base station according to claim 23, characterized in that: The sending module is also used to send a second switching command to the UE if the receiving module receives a second switching request confirmation, and the second switching request confirmation is used to instruct the second base station that the UE uses a second wireless resource configuration in the second cell, and the second switching command carries the second wireless resource configuration, which is allocated by the second cell to the UE.

25. The second base station according to claim 23 or 24, characterized in that: The handover command carries a first identifier, where the first identifier is used to indicate an identifier of the second cell, wherein the handover command includes the first handover command or the second handover command.

26. The second base station according to any one of claims 23 to 25, characterized in that: The sending module is further used to send a negotiation request to the first base station, where the negotiation request is used to indicate a resource allocation rule; The processing module is further used to determine, according to the resource allocation rule, that the UE uses the third wireless resource configuration in the third cell.

27. A system, characterized in that: include: The first base station according to any one of claims 14 to 19; A user equipment UE as claimed in any one of claims 20 to 22.

28. The system according to claim 27, characterized in that Also includes: The second base station as claimed in any one of claims 23 to 26.

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