A method and device for group switching

Abstract

The present application provides a method for group switching. The method includes: a first terminal device receives first information from a first network device, the first information is used to indicate a first resource, the first resource is used to carry fourth information, the fourth information is information for multiple terminal devices to switch cells, wherein the first terminal device is one of the multiple terminal devices; the first terminal device receives the fourth information on the first resource. It can reduce the signaling overhead caused by multiple users switching cells and improve resource utilization.

Description

Technical Field

[0001] The present application relates to the field of communications, and more particularly, to a method and device for group switching. Background Art

[0002] In the traditional switching process of the mobile communication system, when the terminal device is in a connected state, the mobility management of the terminal device is controlled by the connected network device, that is, the network device sends a switching message to the terminal device to instruct the terminal device to switch to a cell and how to switch. With the development of communication technology, the coverage area of ​​a cell may increase exponentially (for example, a cell with a satellite as a network device, a cell using beamforming technology, etc.), and the number of terminal devices served by a cell is also very large. At the same time, a large number of terminal devices may need to switch cells. In the prior art, each terminal device uses signaling to schedule the switching of cell information (for example, a switching message). When a large number of terminal devices need to switch, a signaling storm will be formed. When the control signaling resources are limited, it will cause switching delays or even communication interruptions. Summary of the invention

[0003] The present application provides a method and apparatus for group switching, in order to reduce the signaling overhead caused by switching cells of multiple user equipments and improve resource utilization.

[0004] In a first aspect, a method for group switching is provided. The method can be executed by a first network device or a module (such as a chip) configured in (or used for) the first network device. The following description takes the method executed by the first network device as an example.

[0005] The method includes: a first network device sends first information, the first information is used to indicate a first resource, the first resource is used to carry fourth information, the fourth information is information for multiple terminal devices to switch cells; the first network device sends the fourth information on the first resource.

[0006] According to the above scheme, by scheduling the first resource carrying the information for switching cells of multiple terminal devices through the first public signaling information, it is possible to reduce signaling overhead and improve resource utilization.

[0007] In combination with the first aspect, in some implementations of the first aspect, the first information is carried in a downlink control channel, and / or the fourth information is carried in a downlink shared channel.

[0008] According to the above scheme, the first information is control information carried in the downlink control channel. The first resource carrying information for switching cells of multiple terminal devices is scheduled through a common information (ie, the first information), which can reduce the overhead of the downlink control channel and improve the utilization rate of the downlink control channel.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the fourth information is encrypted by encryption information, and the encryption information is used by the multiple terminal devices to detect the fourth information.

[0010] According to the above scheme, the information for switching cells of multiple terminal devices (ie, the fourth information) is encrypted by encryption information, which can prevent terminal devices other than the multiple terminal devices from decoding the information for switching cells, thereby improving security.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the fourth information includes public information and / or multiple dedicated information, the public information is information common to the multiple terminal devices for switching cells, the multiple dedicated information corresponds to the multiple terminal devices, and each piece of dedicated information is information dedicated to the corresponding terminal device for switching cells.

[0012] According to the above scheme, the fourth information may include information for switching cells of each of the multiple terminal devices, so that the multiple terminal devices can switch cells according to the information for switching cells of the terminal device in the fourth information. The fourth information may also include common information of multiple terminal devices and dedicated information of each terminal device. The common part of the information for switching cells of multiple terminal devices is merged, which can reduce information overhead and improve resource utilization. The fourth information may also be common information for switching cells of multiple terminal devices. The information for switching cells of multiple terminal devices is merged, which can further reduce information overhead and improve resource utilization.

[0013] In combination with the first aspect, in certain implementations of the first aspect, it is characterized in that the fourth information includes multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices, wherein the second identifier is the identifier of the corresponding terminal device in the cell of the second network device, and the cell of the second network device is the cell to which the multiple terminal devices are to switch.

[0014] According to the above solution, the fourth information includes the identifier of each terminal device among the multiple terminal devices in the cell of the second network device to be switched to, so that the terminal device can obtain the identifier in the cell to be switched to.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the multiple second identifiers are arranged in a preset order in the fourth information, or the fourth information also includes at least one of the following: multiple first identifiers, the multiple first identifiers correspond to the multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices through the multiple first identifiers, wherein the first identifier is an identifier of the terminal device in the cell of the first network device; a first value, the first value is used to calculate the second identifier for each of the multiple terminal devices.

[0016] According to the above scheme, the terminal device can determine the second identifier of the terminal device in the fourth information according to a preset order. Alternatively, the terminal device can determine the second identifier corresponding to the first identifier as the second identifier of the terminal device according to the first identifier of the terminal device. Alternatively, the terminal device can also obtain the second identifier of the terminal device according to the first value in the fourth information. The terminal device can determine the second identifier of the terminal device in the fourth information.

[0017] In a second aspect, a method for group switching is provided. The method can be executed by a first network device or a module (such as a chip) configured in (or used for) the first network device. The following description takes the method executed by the first network device as an example.

[0018] The method includes: a first network device sends a first information, the first information is used to indicate a first resource, the first resource is used to carry multiple second information, the multiple second information corresponds to multiple terminal devices, each of the second information is used to indicate a second resource that carries third information of the corresponding terminal device, the third information is information for switching cells; the first network device sends the information of the switching cell of the corresponding terminal device on each of the second resources.

[0019] In conjunction with the second aspect, in some implementations of the second aspect, the method further includes one or more of the following:

[0020] The first information is carried in a downlink control channel; the plurality of second information are carried in a downlink shared channel; and the third information is carried in a downlink shared channel.

[0021] According to the above scheme, by improving the control information (i.e., the second information) of each terminal device scheduling information for switching cells in the existing technology and carrying it in the downlink shared channel, and by scheduling the resources carrying the second information of multiple terminal devices through the first information, the signaling overhead of the downlink control channel can be reduced, the resource utilization of the downlink control channel can be improved, and the existing technology can be modified to a minimum, thereby accelerating the progress of communication standardization.

[0022] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the multiple terminal devices belong to a first terminal device group, and the first information includes an identifier of the first terminal device group.

[0023] According to the above scheme, terminal devices are grouped, and terminal devices in the same terminal device group receive the first information belonging to the terminal device group through the group identifier of the terminal device group to which they belong. Terminal devices that receive information for switching cells through the same first information can be determined in the form of terminal device grouping.

[0024] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the identifier of the first terminal device group is a scrambling code sequence of the information bits in the first information (for example, a scrambling code sequence used by the network device to scramble the information bits or CRC check bits), or the identifier of the first terminal device group is carried in an indication field in the first information.

[0025] According to the above scheme, the identifier of the first terminal device group is used as a scrambling code for the first information, which can not only encrypt the first information and prevent terminal devices outside the first terminal device group from receiving the first information, but also enable the terminal devices in the first terminal device group to determine that the first information belongs to the first terminal device group through the identifier of the first terminal device group. Alternatively, the identifier of the first terminal device group can be carried in an indication field in the first information, so that the terminal devices in the first terminal device group can determine that the first information is the first information of the first terminal device group through the identifier of the first terminal device group carried by the indication field.

[0026] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the information used to switch cells includes a switching condition, and the switching condition is used by a terminal device among the multiple terminal devices to determine whether to switch cells.

[0027] According to the above solution, the information for switching cells includes switching conditions, so that the terminal device can switch cells when the switching conditions are met.

[0028] In combination with the first aspect or the second aspect, in some implementations of the first aspect or the second aspect, the switching condition includes one or more of the following:

[0029] A time condition, which is used to indicate the time when the terminal device initiates the switching;

[0030] A location condition, which is used to indicate the location where the terminal device initiates the handover;

[0031] The first threshold value is used to indicate a threshold value that the signal strength of the cell to which the terminal device switches needs to meet.

[0032] According to the above scheme, the switching condition may be one or more of a time condition, a location condition or a first threshold value of the target cell signal strength, enabling the terminal device to determine whether to switch cells according to the switching condition.

[0033] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the method also includes: the first network device sends a first message to the second network device, the first message is used to request to switch the multiple terminal devices to the cell of the second network device, and the first message includes a first identifier of each of the multiple terminal devices, and the first identifier is an identifier of the terminal device in the cell of the first network device.

[0034] According to the above solution, the first network device switches multiple terminal devices to the second network device through the first message request, which can save the signaling overhead between the first network device and the second network device and improve resource utilization.

[0035] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, it includes: the first network device receives a second message from the second network device, the second message is used to indicate multiple second identifiers, the multiple second identifiers correspond to the multiple terminal devices, wherein the second identifier is the identifier of the corresponding terminal device in the cell of the second network device.

[0036] According to the above solution, the second network device notifies multiple terminal devices of the permission to switch to the cell of the second network device through the second message, which can save the signaling overhead between the first network device and the second network device and improve resource utilization.

[0037] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the second message includes at least one of the following: multiple second identifiers, the multiple second identifiers are arranged in a preset order in the second message; or, multiple first identifiers and multiple second identifiers, the multiple first identifiers correspond to the multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices through the multiple first identifiers, wherein the first identifier is an identifier of the terminal device in the cell of the first network device; or, a first value, the first value is used to calculate the second identifier for each of the multiple terminal devices; or, multiple first values, each of the multiple first values ​​is used to calculate the second identifier for each of the multiple terminal devices.

[0038] According to the above scheme, the second identifiers of multiple terminal devices can be arranged in a preset order in the second message, and the second identifiers of the multiple terminal devices can correspond to the first identifiers of the multiple terminal devices, or the second message includes a first value for the terminal device to calculate the second identifier, so that after the first network device transmits the content in the second message to the terminal device, the terminal device can determine the second identifier of the terminal device.

[0039] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the second message includes a switching condition, and the switching condition is used by a terminal device among the multiple terminal devices to determine whether to switch cells.

[0040] According to the above solution, the second message includes a switching condition, so that after the first network device transmits the content of the second message to the terminal device, the terminal device can switch the service cell if the switching condition is met.

[0041] In combination with the first aspect or the second aspect, in certain implementations of the first aspect or the second aspect, the switching condition includes one or more of the following: a time condition, which is used to indicate the time when the terminal device initiates the switching; a location condition, which is used to indicate the location where the terminal device initiates the switching; a first threshold value, which is used to indicate the threshold value that the signal strength of the cell to which the terminal device switches needs to meet.

[0042] In a third aspect, a method for group switching is provided. The method can be executed by a first terminal device or a module (such as a chip) configured in (or used for) the first terminal device. The following description takes the method executed by the first terminal device as an example.

[0043] The method includes: a first terminal device receives first information from a first network device, the first information is used to indicate a first resource, the first resource is used to carry multiple second information, the multiple second information corresponds to multiple terminal devices, each of the second information is used to indicate a second resource that carries third information of the corresponding terminal device, the third information is information for switching cells, and the first terminal device is one of the multiple terminal devices; the first terminal device receives the third information on the second resource indicated by the corresponding second information.

[0044] In combination with the third aspect, in certain implementations of the third aspect, the method also includes one or more of the following: the first information is carried in a downlink control channel; the multiple second information is carried in a downlink shared channel; the third information is carried in a downlink shared channel.

[0045] In a fourth aspect, a method for group switching is provided. The method can be executed by a first terminal device or a module (such as a chip) configured in (or used for) the first terminal device. The following description will be given by taking the method executed by the first terminal device as an example.

[0046] The method includes: a first terminal device receives first information from a first network device, the first information is used to indicate a first resource, the first resource is used to carry fourth information, the fourth information is information for multiple terminal devices for switching cells, wherein the first terminal device is one of the multiple terminal devices; the first terminal device receives the fourth information on the first resource.

[0047] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first information is carried in a downlink control channel, and / or the fourth information is carried in a downlink shared channel.

[0048] In combination with the fourth aspect, in certain implementations of the fourth aspect, the fourth information is encrypted with encryption information, and the encryption information is used by the multiple terminal devices to detect the fourth information. The method also includes: the first terminal device detects the fourth information based on the encryption information.

[0049] In combination with the fourth aspect, in certain implementations of the fourth aspect, the fourth information includes public information and / or multiple dedicated information, the public information is the information common to the multiple terminal devices for switching cells, the multiple dedicated information corresponds to the multiple terminal devices, and each piece of dedicated information is the information dedicated to the corresponding terminal device for switching cells.

[0050] In combination with the fourth aspect, in certain implementations of the fourth aspect, the fourth information includes multiple second identifiers, which correspond to the multiple terminal devices, wherein the second identifier is an identifier of the corresponding terminal device in the cell of the second network device, and the cell of the second network device is the cell to which the multiple terminal devices are to switch.

[0051] In combination with the fourth aspect, in certain implementations of the fourth aspect, the multiple second identifiers are arranged in the fourth information in a preset order, and the method also includes: the first terminal device determines the second identifier of the first terminal device among the multiple second identifiers according to the preset order.

[0052] In combination with the fourth aspect, in certain implementations of the fourth aspect, the fourth information also includes multiple first identifiers corresponding to the multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices through the multiple first identifiers, wherein the first identifier is the identifier of the terminal device in the cell of the first network device, and the method also includes: the first terminal device determines the second identifier of the first terminal device, and the second identifier of the first terminal device is the second identifier among the multiple second identifiers corresponding to the first identifier of the first terminal device.

[0053] In combination with the fourth aspect, in certain implementations of the fourth aspect, the fourth information includes a first value, and the method also includes: the first terminal device obtains the second identifier of the first terminal device based on the first value, wherein the second identifier is the identifier of the first terminal device in the cell of the second network device, and the cell of the second network device is the cell to which the first terminal device is to switch.

[0054] In combination with the third aspect or the fourth aspect, in certain implementations of the third aspect or the fourth aspect, the multiple terminal devices belong to a first terminal device group, and the first information includes an identifier of the first terminal device group.

[0055] In combination with the third aspect or the fourth aspect, in certain implementations of the third aspect or the fourth aspect, the identifier of the first terminal device group is a scrambling code sequence of information bits in the first information, or the identifier of the first terminal device group is carried in an indication field in the first information.

[0056] In combination with the third aspect or the fourth aspect, in certain implementations of the third aspect or the fourth aspect, the information used to switch cells includes a switching condition, and the switching condition is used by a terminal device among the multiple terminal devices to determine whether to switch a service cell.

[0057] In combination with the third aspect or the fourth aspect, in certain implementations of the third aspect or the fourth aspect, the switching condition includes one or more of the following: a time condition, which is used to indicate the time when the terminal device initiates the switching; a location condition, which is used to indicate the location where the terminal device initiates the switching; a first threshold value, which is used to indicate the threshold value that the signal strength of the cell to which the terminal device switches needs to meet.

[0058] In a fifth aspect, a method for group switching is provided. The method can be executed by a second network device or a module (such as a chip) configured in (or used for) the second network device. The following description will be given by taking the method executed by the second network device as an example.

[0059] The method includes: a second network device receives a first message from a first network device, the first message is used to request that multiple terminal devices be switched to a cell of the second network device, the first message includes a first identifier of each of the multiple terminal devices, the first identifier is an identifier of the terminal device in the cell of the first network device. The second network device determines, according to the first message, that the multiple terminal devices need to be switched to the cell of the second network device.

[0060] In combination with the fifth aspect, in certain implementation methods of the fifth aspect, it includes: the second network device sends a second message to the first network device, the second message is used to indicate multiple second identifiers, the multiple second identifiers correspond to the multiple terminal devices, wherein the second identifier is the identifier of the corresponding terminal device in the cell of the second network device.

[0061] In combination with the fifth aspect, in certain implementations of the fifth aspect, the second message includes at least one of the following: multiple second identifiers, the multiple second identifiers are arranged in a preset order in the second message; or, multiple first identifiers and multiple second identifiers, the multiple first identifiers correspond to the multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices through the multiple first identifiers, wherein the first identifier is an identifier of the terminal device in the cell of the first network device; or, a first value, the first value is used to calculate the second identifier for each of the multiple terminal devices; or, multiple first values, each of the multiple first values ​​is used to calculate the second identifier for each of the multiple terminal devices.

[0062] In combination with the fifth aspect, in certain implementations of the fifth aspect, the second message includes a switching condition, and the switching condition is used by a terminal device among the multiple terminal devices to determine whether to switch cells.

[0063] In combination with the fifth aspect, in certain implementations of the fifth aspect, the switching condition includes one or more of the following: a time condition, which is used to indicate the time when the terminal device initiates the switching; a location condition, which is used to indicate the location where the terminal device initiates the switching; a first threshold value, which is used to indicate the threshold value that the signal strength of the cell to which the terminal device switches needs to meet.

[0064] In a sixth aspect, a communication device for group switching is provided, wherein the method is a first network device or a module (such as a chip) configured in (or used for) the first network device.

[0065] The communication device includes: a processing unit, configured to generate first information, the first information is used to indicate a first resource, the first resource is used to carry fourth information, the fourth information is information for switching cells of multiple terminal devices; a transceiver unit, configured to send the first information;

[0066] In combination with the sixth aspect, in certain implementations of the sixth aspect, the first information is carried in a downlink control channel, and / or the fourth information is carried in a downlink shared channel.

[0067] In combination with the sixth aspect, in certain implementations of the sixth aspect, the fourth information is encrypted with encryption information, and the encrypted information is used by the multiple terminal devices to detect the fourth information.

[0068] In combination with the sixth aspect, in certain implementations of the sixth aspect, the fourth information includes public information and / or multiple dedicated information, the public information is information common to the multiple terminal devices for switching cells, the multiple dedicated information corresponds to the multiple terminal devices, and each piece of dedicated information is information dedicated to the corresponding terminal device for switching cells.

[0069] In combination with the sixth aspect, in certain implementations of the sixth aspect, the fourth information includes multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices, wherein the second identifier is the identifier of the corresponding terminal device in the cell of the second network device, and the cell on the second network is the cell to which the multiple terminal devices are to switch.

[0070] In combination with the sixth aspect, in certain implementations of the sixth aspect, the multiple second identifiers are arranged in a preset order in the fourth information.

[0071] In combination with the sixth aspect, in certain implementations of the sixth aspect, the fourth information also includes multiple first identifiers corresponding to the multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices through the multiple first identifiers, wherein the first identifier is the identifier of the terminal device in the cell of the first network device.

[0072] In combination with the sixth aspect, in some implementations of the sixth aspect, the fourth information further includes multiple first identifiers, the multiple first identifiers correspond to the multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices through the multiple first identifiers, wherein the first identifier is an identifier of the terminal device in the cell of the first network device;

[0073] In combination with the sixth aspect, in certain implementations of the sixth aspect, the fourth information includes a first value, and the first value is used for each terminal device in the multiple terminal devices to calculate the second identifier.

[0074] In a seventh aspect, a communication device for group switching is provided, wherein the method is a first network device or a module (such as a chip) configured in (or used for) the first network device.

[0075] The communication device includes: a processing unit, used to generate first information, the first information is used to indicate a first resource, the first resource is used to carry multiple second information, the multiple second information corresponds to multiple terminal devices, each of the second information is used to indicate a second resource that carries third information of the corresponding terminal device, the third information is information for switching cells; a transceiver unit, used to send the first information.

[0076] In conjunction with the seventh aspect, in some implementations of the seventh aspect, one or more of the following are included:

[0077] The first information is carried in a downlink control channel; the plurality of second information are carried in a downlink shared channel; and the third information is carried in a downlink shared channel.

[0078] In combination with the sixth aspect or the seventh aspect, in certain implementations of the sixth aspect or the seventh aspect, the multiple terminal devices belong to a first terminal device group, and the first information includes an identifier of the first terminal device group.

[0079] In combination with the sixth aspect or the seventh aspect, in certain implementations of the sixth aspect or the seventh aspect, the identifier of the first terminal device group is a scrambling code sequence of information bits in the first information, or the identifier of the first terminal device group is carried in an indication field in the first information.

[0080] In combination with the sixth aspect or the seventh aspect, in certain implementations of the sixth aspect or the seventh aspect, it includes: the transceiver unit is also used to send a first message to the second network device, the first message is used to request to switch the multiple terminal devices to the cell of the second network device, and the first message includes a first identifier of each of the multiple terminal devices, and the first identifier is an identifier of the terminal device in the cell of the first network device.

[0081] In combination with the sixth aspect or the seventh aspect, in certain implementations of the sixth aspect or the seventh aspect, it includes: the transceiver unit is also used to receive a second message from the second network device, the second message is used to indicate multiple second identifiers, the multiple second identifiers correspond to the multiple terminal devices, wherein the second identifier is the identifier of the corresponding terminal device in the cell of the second network device.

[0082] In combination with the sixth aspect or the seventh aspect, in certain implementations of the sixth aspect or the seventh aspect, the second message includes at least one of the following: the multiple second identifiers, the multiple second identifiers are arranged in a preset order in the second message; multiple first identifiers and the multiple second identifiers, the multiple first identifiers correspond to the multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices through the multiple first identifiers, wherein the first identifier is an identifier of the terminal device in the cell of the first network device; a first value, the first value is used to calculate the second identifier for each of the multiple terminal devices.

[0083] In combination with the sixth aspect or the seventh aspect, in certain implementations of the sixth aspect or the seventh aspect, the information used to switch cells includes a switching condition, and the switching condition is used by a terminal device among the multiple terminal devices to determine whether to switch cells.

[0084] In combination with the sixth aspect or the seventh aspect, in certain implementations of the sixth aspect or the seventh aspect, the switching condition includes one or more of the following:

[0085] A time condition, which is used to indicate the time when the terminal device initiates switching; a location condition, which is used to indicate the location where the terminal device initiates switching; and a first threshold value, which is used to indicate the threshold value that the signal strength of the cell to which the terminal device switches needs to meet.

[0086] In one implementation, the communication device of the sixth aspect or the seventh aspect is a first network device. When the communication device is a first network device, the communication interface may be a transceiver, or an input / output interface. Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0087] In another implementation, the communication device is a chip or a chip system. When the communication device is a chip or a chip system, the communication interface may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

[0088] In an eighth aspect, a communication device for group switching is provided, wherein the method is a first terminal device or a module (such as a chip) configured in (or used for) the first terminal device.

[0089] The communication device includes: a transceiver unit, used to receive first information from a first network device, the first information is used to indicate a first resource, the first resource is used to carry fourth information, the fourth information is information for switching cells of multiple terminal devices, wherein the communication device is configured in a first terminal device among the multiple terminal devices; and a processing unit, used to determine the first resource based on the first information.

[0090] In combination with the eighth aspect, in certain implementations of the eighth aspect, the first information is carried in a downlink control channel, and / or the fourth information is carried in a downlink shared channel.

[0091] In combination with the eighth aspect, in certain implementations of the eighth aspect, the fourth information is encrypted by encryption information, the encrypted information is used by the multiple terminal devices to detect the fourth information, and the processing unit is also used to detect the fourth information based on the encrypted information.

[0092] In combination with the eighth aspect, in certain implementations of the eighth aspect, the fourth information includes public information and / or multiple dedicated information, the public information is the information of the switching cell common to the multiple terminal devices, the multiple dedicated information corresponds to the multiple terminal devices, and each of the dedicated information is the information of the switching cell dedicated to the corresponding terminal device.

[0093] In combination with the eighth aspect, in certain implementations of the eighth aspect, the fourth information includes multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices, wherein the second identifier is an identifier of the corresponding terminal device in the cell of the second network device.

[0094] In combination with the eighth aspect, in certain implementations of the eighth aspect, the multiple second identifiers are arranged in the fourth information in a preset order, and the processing unit is also used to determine the second identifier of the first terminal device among the multiple second identifiers according to the preset order.

[0095] In combination with the eighth aspect, in certain implementations of the eighth aspect, the fourth information also includes multiple first identifiers corresponding to the multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices through the multiple first identifiers, wherein the first identifier is an identifier of the terminal device in the cell of the first network device, and,

[0096] The processing unit is further used to determine the second identifier of the first terminal device, where the second identifier of the first terminal device is the second identifier among the multiple second identifiers that corresponds to the first identifier of the first terminal device.

[0097] In combination with the eighth aspect, in certain implementations of the eighth aspect, the fourth information includes a first value, and the processing unit is further used to obtain the second identifier of the first terminal device based on the first value.

[0098] In a ninth aspect, a communication device for group switching is provided, wherein the method is a first terminal device or a module (such as a chip) configured in (or used for) the first terminal device.

[0099] The communication device includes: a transceiver unit, used to receive first information from a first network device, the first information is used to indicate a first resource, the first resource is used to carry multiple second information, the multiple second information corresponds to multiple terminal devices, each of the second information is used to indicate a second resource that carries third information of the corresponding terminal device, the third information is information for switching cells, and the communication device is configured in a first terminal device among the multiple terminal devices; a processing unit, used to determine the second resource according to the second information corresponding to the first terminal device.

[0100] In conjunction with the ninth aspect, in some implementations of the ninth aspect, one or more of the following are included:

[0101] The first information is carried in a downlink control channel; the plurality of second information are carried in a downlink shared channel; and the third information is carried in a downlink shared channel.

[0102] In combination with the eighth aspect or the ninth aspect, in certain implementations of the eighth aspect or the ninth aspect, the multiple terminal devices belong to a first terminal device group, and the first information includes an identifier of the first terminal device group.

[0103] In combination with the eighth aspect or the ninth aspect, in certain implementations of the eighth aspect or the ninth aspect, the identifier of the first terminal device group is a scrambling code sequence of information bits in the first information, or the identifier of the first terminal device group is carried in an indication field in the first information.

[0104] In combination with the eighth aspect or the ninth aspect, in certain implementations of the eighth aspect or the ninth aspect, the information used to switch cells includes a switching condition, and the switching condition is used by a terminal device among the multiple terminal devices to determine whether to switch cells.

[0105] In combination with the eighth aspect or the ninth aspect, in certain implementations of the eighth aspect or the ninth aspect, the switching condition includes one or more of the following: a time condition, the time condition being used to indicate the time when the terminal device initiates the switching; a location condition, the location condition being used to indicate the location where the terminal device initiates the switching; a first threshold value, the first threshold value being used to indicate the threshold value that the signal strength of the cell to which the terminal device switches needs to meet.

[0106] In one implementation, the communication device of the eighth aspect or the ninth aspect is a first terminal device. When the communication device is a first terminal device, the communication interface may be a transceiver, or an input / output interface. Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0107] In another implementation, the communication device is a chip or a chip system. When the communication device is a chip or a chip system, the communication interface may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

[0108] In a tenth aspect, a communication device for group switching is provided, wherein the method is a second network device or a module (such as a chip) configured in (or used for) a second network device.

[0109] The communication device includes: a transceiver unit, configured to receive a first message from a first network device, the first message being used to request that a plurality of terminal devices be switched to a cell of a second network device, the first message including a first identifier of each of the plurality of terminal devices, the first identifier being an identifier of the terminal device in the cell of the first network device. A processing unit, configured to determine, according to the first message, that the plurality of terminal devices need to be switched to the cell of the second network device.

[0110] In combination with the tenth aspect, in certain implementations of the tenth aspect, it includes: the transceiver unit is also used to send a second message to the first network device, the second message includes multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices, wherein the second identifier is the identifier of the corresponding terminal device in the cell of the second network device.

[0111] In combination with the tenth aspect, in certain implementations of the tenth aspect, the second message includes at least one of the following: multiple second identifiers, the multiple second identifiers are arranged in a preset order in the second message; or, multiple first identifiers and multiple second identifiers, the multiple first identifiers correspond to the multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices through the multiple first identifiers, wherein the first identifier is an identifier of the terminal device in the cell of the first network device; or, a first value, the first value is used to calculate the second identifier for each of the multiple terminal devices; or, multiple first values, each of the multiple first values ​​is used to calculate the second identifier for each of the multiple terminal devices.

[0112] In combination with the tenth aspect, in certain implementations of the tenth aspect, the second message includes a switching condition, and the switching condition is used by a terminal device among the multiple terminal devices to determine whether to switch cells.

[0113] In conjunction with the tenth aspect, in some implementations of the tenth aspect, the switching condition includes one or more of the following:

[0114] A time condition, which is used to indicate the time when the terminal device initiates switching; a location condition, which is used to indicate the location where the terminal device initiates switching; and a first threshold value, which is used to indicate the threshold value that the signal strength of the cell to which the terminal device switches needs to meet.

[0115] In the eleventh aspect, a communication system includes: a first network device, used to send a first message to the second network device, the first message is used to request to switch multiple terminal devices to the cell of the second network device, the first message includes a first identifier of each of the multiple terminal devices, the first identifier is an identifier of the terminal device in the cell of the first network device; the second network device is used to receive the first message from the first network device.

[0116] In combination with the eleventh aspect, in certain implementations of the eleventh aspect, the second network device is also used to send a second message to the first network device, the second message including multiple second identifiers, the multiple second identifiers corresponding to the multiple terminal devices, wherein the second identifier is an identifier of the corresponding terminal device in the cell of the second network device; the first network device is also used to receive the second message from the second network device.

[0117] In combination with the eleventh aspect, in some implementations of the eleventh aspect, the multiple second identifiers are arranged in a preset order in the second message, or the second message further includes at least one of the following:

[0118] A plurality of first identifiers, the plurality of first identifiers correspond to the plurality of second identifiers, and the plurality of second identifiers correspond to the plurality of terminal devices through the plurality of first identifiers, wherein the first identifier is an identifier of the terminal device in the cell of the first network device; and a first value, the first value is used to calculate a second identifier for each of the plurality of terminal devices.

[0119] In combination with the eleventh aspect, in certain implementations of the eleventh aspect, the second message includes a switching condition, and the switching condition is used by a terminal device among the multiple terminal devices to determine whether to switch cells.

[0120] In conjunction with the eleventh aspect, in some implementations of the eleventh aspect, the switching condition includes one or more of the following:

[0121] A time condition, which is used to indicate the time when the terminal device initiates switching; a location condition, which is used to indicate the location where the terminal device initiates switching; and a first threshold value, which is used to indicate the threshold value that the signal strength of the cell to which the terminal device switches needs to meet.

[0122] In one implementation, the communication device of the eighth aspect or the ninth aspect is a second network device. When the communication device is a second network device, the communication interface may be a transceiver, or an input / output interface. Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0123] In another implementation, the communication device is a chip or a chip system. When the communication device is a chip or a chip system, the communication interface may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

[0124] In a twelfth aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any possible implementation of the first to fifth aspects and the first to fifth aspects.

[0125] In the specific implementation process, the processor can be one or more chips, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a trigger, and various logic circuits. The input signal received by the input circuit can be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and the input circuit and the output circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation methods of the processor and various circuits.

[0126] In a thirteenth aspect, a processing device is provided, comprising a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute the method in any possible implementation of the first to fifth aspects and the first to fifth aspects.

[0127] Optionally, the processor is one or more and the memory is one or more.

[0128] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0129] In the specific implementation process, the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated with the processor on the same chip or can be set on different chips respectively. The embodiments of the present application do not limit the type of memory and the setting method of the memory and the processor.

[0130] It should be understood that the relevant data interaction process, such as sending indication information, can be a process of outputting indication information from the processor, and receiving capability information can be a process of receiving input capability information from the processor. Specifically, the data output by the processor can be output to the transmitter, and the input data received by the processor can come from the receiver. Among them, the transmitter and the receiver can be collectively referred to as a transceiver.

[0131] The processing device in the above-mentioned thirteenth aspect may be one or more chips. The processor in the processing device 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, and the memory may be integrated in the processor or located outside the processor and exist independently.

[0132] In the fourteenth aspect, a computer program product is provided, which includes: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute the method in the above-mentioned first to fifth aspects and any possible implementation of the first to fifth aspects.

[0133] In the fifteenth aspect, a computer-readable medium is provided, which stores a computer program (also referred to as code, or instructions) which, when executed on a computer, enables the computer to execute the method in the above-mentioned first to fifth aspects and any possible implementation of the first to fifth aspects.

[0134] In a sixteenth aspect, a communication system is provided, which includes the one or more network devices mentioned above. The system may further include the one or more terminal devices mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0135] Figure 1 It is a schematic architecture diagram of a communication system applicable to an embodiment of the present application.

[0136] Figure 2 is another schematic architecture diagram of a communication system applicable to the present application.

[0137] Figure 3It is a schematic flowchart of a method for group switching provided in an embodiment of the present application.

[0138] Figure 4 is another schematic flowchart of a method for group switching provided in an embodiment of the present application.

[0139] Figure 5 is another schematic flowchart of a method for group switching provided in an embodiment of the present application.

[0140] Figure 6 This is a schematic block diagram of an example of a communication device of the present application.

[0141] Figure 7 This is a schematic structural diagram of an example of a terminal device of the present application.

[0142] Figure 8 This is a schematic structural diagram of an example of a network device of the present application. DETAILED DESCRIPTION

[0143] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0144] The technical solution of the embodiment of the present application can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, future fifth generation (5G) system or new radio (NR) system, vehicle-to-X V2X, where V2X may include vehicle to network (V2N), vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to pedestrian (V2P), etc., long term evolution technology for vehicle communication (LTE-V), Internet of Vehicles, machine type communication (MTC), Internet of Things (IoT), etc. Things, IoT, Long Term Evolution-Machine (LTE-M), Machine to Machine (M2M), non-terrestrial network (NTN) system, NTN system can also be called satellite communication system, or other communication systems that will evolve in the future.

[0145] According to the satellite altitude, that is, the altitude of the satellite orbit, the satellite system can be divided into low earthorbit (LEO), medium earth orbit (MEO), and high earthorbit (GEO) (or geostationary orbit satellite). Among them, the satellite altitude of LEO is about: 300 kilometers (km)-1500km. The satellite altitude of MEO is between LEO and GEO. In GEO, the satellite movement speed is the same as the rotation speed of the earth and remains stationary relative to the ground; the satellite altitude is about 35768km. The satellite system can be composed of geostationary orbit satellites (GEO) or non-geostationary orbit (NGEO) satellites (such as LEO or MEO), or it can be composed of a network of multiple satellites composed of both.

[0146] Figure 1 , Figure 2 They are schematic diagrams of wireless communication systems 100 and 200 applicable to the embodiments of the present application respectively.

[0147] The wireless communication system applicable to the embodiment of the application may include at least two network devices, and the at least two network devices may be network devices installed on the ground, such as Figure 1 The network devices 130 and 140 in the wireless communication system 100 are shown. The at least two network devices may also be satellites, such as Figure 2 The network devices 230 and 240 in the wireless communication system 200 shown in the figure. Alternatively, the at least two network devices include a network device installed on the ground and a satellite, which is not limited in the present application. The wireless communication system applicable to the present embodiment of the application may also include at least two terminal devices, such as Figure 1 The terminal devices 110, 120 in the wireless communication system 100 shown, or Figure 2 The terminal devices 210 and 220 in the wireless communication system 200 are shown. The at least two terminal devices are connected to a cell under the same network device among the at least two network devices, and the network device can switch the at least two terminal devices to a cell of another network device among the at least two network devices through the method provided in the embodiment of the present application.

[0148] The terminal device in the embodiment of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile communication network (PLMN), etc. The terminal device represented by a satellite phone and a vehicle-mounted satellite system can communicate directly with a satellite. The fixed terminal represented by a ground communication station needs to be relayed by a ground station before it can communicate with a satellite. The terminal device realizes the setting and acquisition of the communication status by installing a wireless transceiver antenna to complete the communication.

[0149] It should be understood that the present application does not limit the specific form of the terminal device.

[0150] The network device in the embodiment of the present application can be any device with wireless transceiver function. The device includes but is not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home evolved NodeB, or HomeNode B, HNB), Base Band Unit (BBU), Access Point (AP) in Wireless Fidelity (WIFI) system, wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc., and can also be a gNB or transmission point (TRP or TP) in a 5G (such as NR) system, or one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or it can also be a network node constituting a gNB or transmission point, such as a baseband unit (BBU), or a distributed unit (DU), etc.

[0151] The network device in the embodiment of the present application may also be a satellite, which can act as a relay, perform RF filtering, amplification, etc., and regenerate the signal. The satellite can also act as a gNB, DU, or relay with signal processing function, similar to an integrated access and backhaul (IAB) node.

[0152] In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include an active antenna unit (AAU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB, for example, the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer. The AAU implements some physical layer processing functions, radio frequency processing, and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, therefore, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU, or, sent by the DU+AAU. It can be understood that the network device can be a device including one or more of a CU node, a DU node, and an AAU node. In addition, the CU may be divided into a network device in an access network (radio access network, RAN), or the CU may be divided into a network device in a core network (core network, CN), and this application does not limit this.

[0153] The network equipment provides communication services for the terminal equipment in the cell. The terminal equipment in the cell communicates with the network equipment through the transmission resources allocated by the network equipment (for example, frequency domain resources, time domain resources, etc.). The cell may belong to a macro base station (for example, a macro eNB or a macro gNB, etc.), or the cell may belong to a satellite.

[0154] The present application proposes that a source network device (i.e., an example of a first network device) requests to switch multiple terminal devices to a cell of a target network device (i.e., an example of a second network device) in one switching request, and schedules the switching cell information of multiple terminal devices through the same downlink control information, which can save signaling overhead and improve resource utilization.

[0155] Figure 3 It is a schematic flowchart of a method for switching cells provided in an embodiment of the present application.

[0156] It should be noted that in order to clearly introduce the solution of this application, Figure 3In the illustrated embodiment, two terminal devices, namely terminal device A and terminal device B, are used as examples for explanation. The solution of the present application can be used to request cell switching of multiple terminal devices at the same time.

[0157] S310, network device #1 (ie, an example of the first network device) determines to switch terminal device A and terminal device B to the cell of network device #2 (ie, an example of the second network device).

[0158] In one implementation, network device #1 may group terminal devices according to the location of the terminal devices and / or the characteristics of the data bearers of the terminal devices, such as the number and parameters, and then network device #1 determines to switch the terminal devices in the terminal device group to the cell of network device #2 according to the measurement reports of the terminal devices in the terminal device group. The location of the terminal device may be the absolute geographical location of the terminal device (e.g., geographical coordinates), or the relative geographical location of the terminal device relative to network device #1 or network device #2, which is not limited in this application. Among them, the bearer is a channel used to transmit data when the terminal device is connected to the network device, and its parameters such as capacity, delay and bit error rate are configured by the network device. If the number of bearers of terminal device A and terminal device B is the same, and the bearer parameters of the two are similar or the same one by one, then it can be considered that the two terminal devices have the same bearer characteristics, wherein similar bearer parameters refer to the value of the same type of bearer parameters being less than a preset value. For example, terminal device A has two bearers M and N, and the capacity, delay and bit error rate of M are X1, Y1, and Z1 respectively; the capacity, delay and bit error rate of N are X2, Y2, and Z2 respectively. Terminal device B has two bearers K and L. The capacity, delay and bit error rate of K are similar or the same as those of M, and the capacity, delay and bit error rate of L are similar or the same as those of N. Then network device #1 can consider that terminal device A and terminal device B have similar or the same bearers (or bearer characteristics) and classify terminal device A and terminal device B into the same group.

[0159] For example, the locations of the terminal devices in the same terminal device group are the same or close. Network device #1 divides terminal device A and terminal device B into the same group according to the locations of terminal device A and terminal device B. For example, terminal device A and terminal device B form terminal device group #1 (i.e., an example of the first terminal device group). Network device #1 can determine the location of the terminal device by reporting the location information of the terminal device.

[0160] For another example, the terminal devices in the same terminal device group have the same data bearer characteristics, for example, terminal device A and terminal device B are both in a call. Network device #1 divides terminal device A and terminal device B into terminal device group #1 according to the data bearer characteristics of terminal device A and terminal device B.

[0161] For another example, the positions of the terminal devices in the same terminal device group are the same or close, and the characteristics of the data carried are the same or close. Network device #1 determines that the positions of terminal device A and terminal device B are the same or close, and the characteristics of the data carried are the same or close, and therefore, terminal device A and terminal device B are divided into terminal device group #1 (i.e., an example of the first terminal device group).

[0162] As an example but not limitation, network device #1 may determine to switch a terminal device in the terminal device group to the cell of network device #2 based on a measurement report sent by one or more terminal devices in the terminal device group to the network device.

[0163] For example, network device #1 determines to switch the terminal devices in the terminal device group based on the measurement reports of some terminal devices (such as one or several) in the terminal device group. The positions of the terminal devices in a terminal device group are the same or close. When some terminal devices in a terminal device group report to network device #1 that the quality of the service cell is poor and they need to switch to the target cell, the probability that the communication quality of the terminal devices in the same terminal device group that are close to each other in the service cell is poor is also relatively high. Therefore, it is possible to determine to switch the terminal devices in the terminal device group based on the measurement reports of the part of the terminal devices in the terminal device group. For example, if the measurement report of terminal device A in terminal device group #1 indicates that the service quality of the service cell is poor and needs to be switched to the cell of network device #2, the network device determines to switch terminal device A and terminal device B in terminal device group #1 to the cell of network device #2, but the present application is not limited to this.

[0164] For another example, network device #1 determines to switch the terminal devices in the terminal device group based on the measurement reports of all the terminal devices in the terminal device group. For example, network device #1 may determine to switch the service cell of the terminal devices in the terminal device group when the proportion of terminal devices in the terminal device group that report poor cell service quality is greater than a threshold. Alternatively, network device #1 may determine to switch the service cell of the terminal devices in the terminal device group when all the terminal devices in the terminal device group report poor service quality of the service cell, but the present application is not limited thereto.

[0165] In another implementation, network device #1 may determine, based on measurement reports of terminal device A and terminal device B, to switch terminal device A and terminal device B to the cell of network device #2.

[0166] That is to say, network device #1 may not group the terminal devices, and after receiving measurement reports from multiple terminal devices, determine multiple terminal devices to be switched together.

[0167] For example, network device #1 receives measurement reports from multiple terminal devices, where the locations of terminal device A and terminal device B are the same or similar, and both the measurement report of terminal device A and the measurement report of terminal device B indicate that the quality of the cell of network device #2 is better, then network device #1 determines to switch terminal device A and terminal device B to the cell of network device #2, but the present application is not limited to this.

[0168] Optionally, the measurement report of the terminal device may include location information of the terminal device.

[0169] For another example, network device #1 receives measurement reports from multiple terminal devices, where the data carrying characteristics of terminal device A and terminal device B are the same or similar, and both the measurement report of terminal device A and the measurement report of terminal device B indicate that the quality of the cell of network device #2 is better, then network device #1 determines to switch terminal device A and terminal device B to the cell of network device #2, but the present application is not limited to this.

[0170] S320, the network device #1 sends a message #1 to the network device #2, where the message #1 is used to request that the terminal device A and the terminal device B be switched to the cell of the network device #2.

[0171] The network device #2 receives message #1 from the network device #1, and determines the terminal device that needs to be switched to the cell of the network device #2. The message #1 may include the identifier #1 of each terminal device among the multiple terminal devices that need to be switched, that is, the message #1 includes the identifier #1A of the terminal device A and the identifier #1B of the terminal device B. As an example and not limited, the identifier #1 is the identifier of the terminal device in the cell of the network device #1, that is, the identifier #1A is the identifier of the terminal device A in the cell of the network device #1, and the identifier #1B is the identifier of the terminal device B in the cell of the network device #1.

[0172] Optionally, message #1 may include a group identifier of a terminal device group consisting of terminal device A and terminal device B.

[0173] Optionally, message #1 may include the indexes of terminal device A and terminal device B in the terminal device group consisting of terminal device A and terminal device B.

[0174] As an example and not limitation, the message #1 is a handover request message.

[0175] Optionally, the message #1 may further include one or more of the following:

[0176] Radio resource management (RRM) configuration information, information related to the quality of service flow (QoS flow) of the terminal device, system information block 1 (SIB1) of network device #1, capability information of the terminal device, or measurement information reported by the terminal device.

[0177] S330, the network device #2 sends a message #2 to the network device #1, where the message #2 is used to confirm that the terminal device A and the terminal device B are allowed to switch to the cell of the network device #2.

[0178] The network device #1 receives message #2 from the network device #2, and confirms whether the network device #2 allows the terminal device A and the terminal device B to switch to the cell of the network device #2 according to the message #2.

[0179] When network device #2 confirms through message #2 that terminal device A and terminal device B are allowed to switch to the cell of network device #2, message #2 can be used to indicate the identification #2 of terminal device A and terminal device B in the cell of network device #2. Message #2 is used to indicate the identification #2 of terminal device A and terminal device B in the cell of network device #2, which can be a direct indication or an indirect indication. In other words, message #2 is used to indicate the identification #2 of each terminal device in terminal device group #1. In other words, message #2 can include information element A, which is used to determine the identification #2A of terminal device A in the cell of network device #2 and the identification #2B of terminal device B in the cell of network device #2.

[0180] Optionally, message #2 may include a group identifier of a terminal device group consisting of terminal device A and terminal device B.

[0181] Optionally, message #2 may include the indexes of terminal device A and terminal device B in the terminal device group consisting of terminal device A and terminal device B.

[0182] In one implementation, message #2 directly indicates the identifier #2 of terminal device A and terminal device B in the cell of network device #2, and the arrangement order of the identifier #2 of terminal device A and terminal device B in message #2 (i.e., the arrangement order in information element A) is the same as the arrangement order of the identifier #1 of terminal device A and terminal device B in message #1, wherein identifier #1 is the identifier of the terminal device in the cell of network device #1. Network device #1 determines identifier #2A of terminal device A and identifier #2B of terminal device B according to the arrangement order of identifier #1A and identifier #1B in message #1. For example, the first identifier #1 in message #1 is identifier #1A of terminal device A, and the second identifier #1 is identifier #1B of terminal device B. Network device #1 can determine that the first identifier #2 in message #2 is identifier #2A of terminal device A, and the second identifier #2 in message #2 is identifier #2B of terminal device B, but the present application is not limited to this.

[0183] In another implementation, message #2 directly indicates the identifier #2 of terminal device A and terminal device B in the cell of network device #2, which may be information element A including identifier #2A of terminal device A and identifier #2B of terminal device B. The identifier #2A and identifier #2B are arranged in a preset order in information element A. The preset order may be that the identifiers (e.g., serial numbers) of terminal device A and terminal device B are arranged from large to small or from small to large. In other words, terminal device A and terminal device B are arranged in terminal device group #1. The identifiers (such as serial numbers) are arranged from large to small or from small to large. For example, the serial number of terminal device A in the two terminal devices is 2, and the serial number of terminal device B in the two terminal devices is 1. The preset order is arranged in the order of the serial numbers of terminal device A and terminal device B from small to large. Then the arrangement order of identifier #2A and identifier #2B in cell A is identifier #2B, identifier #2A, that is, identifier #2A is the first in cell A, and identifier #2B is the second in cell B, but the present application is not limited to this. Among them, network device #1 and network device #2 can know the preset order or the serial number of the terminal device in advance through information exchange, and the terminal device can know the preset order or the serial number of the terminal device in advance through the indication of network device #1, but the present application is not limited to this.

[0184] In another implementation, message #2 directly indicates the identifier #2 of terminal device A and terminal device B in the cell of network device #2, and may be that information element A includes both the identifier #1 of each of the two terminal devices A and terminal device B and the identifier #2 of the two terminal devices. The two identifiers #2 in information element A correspond to the two identifiers #1, that is, in information element A, identifier #2A corresponds to identifier #1A, and identifier #2B corresponds to identifier #1B. This allows network device #1 and / or terminal device A to determine the identifier #2A of terminal device A in the cell of network device #2 based on identifier #1A of terminal device A after receiving information element A, that is, network device #1 and / or terminal device A determines that identifier #2A is the identifier of terminal device A in the cell of network device #2 based on identifier #2A corresponding to identifier #1A. Similarly, after receiving information element A, network device #1 and / or terminal device B can determine the identifier #2B of terminal device B in the cell of network device #2 based on the identifier #1B of terminal device B. In other words, network device #1 and / or terminal device B determines that identifier #2B is the identifier of terminal device B in the cell of network device #2 based on the identifier #2B corresponding to identifier #1B.

[0185] In another implementation, message #2 indirectly indicates the identifier #2 of terminal device A and terminal device B in the cell of network device #2, and cell A may include a first value, which is used for terminal device A and terminal device B to obtain their respective identifiers #2.

[0186] The first value may be an offset, and the identifier #2 of the terminal device in the cell of network device #2 may be calculated by adding the identifier #1 of the terminal device in the cell of network device #1 to the first value. For example, the identifier of terminal device A in the cell of network device #2 may be obtained by adding the first value to the identifier #1A of terminal device A to obtain identifier #2A. Similarly, identifier #1B may be added to the first value to obtain identifier #2B.

[0187] Optionally, when the identifier #2 of a terminal device obtained by the first value is the same as the identifier of another terminal device in the cell of network device #2, network device #2 may send a response message of a switching request dedicated to the terminal device to network device #1, which includes the identifier #2 assigned by network device #2 to the terminal device (the identifier #2 is different from the identifier obtained by the first value).

[0188] As an example but not limiting, message #2 may include two first values, which correspond to two terminal devices. That is, network device #2 assigns a first value to each terminal device, and network device #1 can calculate the identifier #2 of each terminal device according to the first value corresponding to each terminal device. For example, the first value of terminal device A is a, and network device #1 adds identifier #1A to a to obtain identifier #2A, and the first value of terminal device B is b, and network device #1 adds identifier #1A to b to obtain identifier #2B.

[0189] As an example and not limitation, identifier #1 and / or identifier #2 is a cell-radio network temporary identity (C-RNTI).

[0190] Optionally, message #2 may also include but is not limited to one or more of the following:

[0191] The identifier of the cell of network device #2 (i.e., the target cell to which terminal device A and terminal device B switch), a set of random access resources, the correspondence between random access resources and synchronization message blocks (synchronization signal block, SSB), channel state information reference signal (channel state information reference signal, CSI-RS) configuration information or system information of the target cell.

[0192] In one embodiment, Figure 3 The illustrated embodiment can also be used for conditional switching of a terminal device group, wherein the message #1 sent by network device #1 to network device #2 in S320 is a conditional switching request, which is used to request terminal device A and terminal device B to switch to the cell of network device #2 when the switching condition is met. In S330, the message #2 sent by network device #2 to network device #1 is a response to the conditional switching request.

[0193] Optionally, message #2 may include information element B, where information element B is used to indicate the switching conditions of terminal device A and terminal device B. That is, information element B is used to indicate the conditions for initiating switching of terminal device A and terminal device B. The condition for initiating switching may be a condition that the terminal device sends a random access signal for switching cells to network device #2, but the present application is not limited thereto. The switching condition may include but is not limited to one or more of the following:

[0194] A time condition, which is used to indicate the time when the terminal device initiates the switching;

[0195] A location condition, where the location condition is used to indicate the location of the terminal device that initiates the handover. The location of the terminal device may be an absolute geographical location of the terminal device (e.g., geographical coordinates), or a relative geographical location of the terminal device relative to network device #1 or network device #2, which is not limited in the present application;

[0196] The first threshold value is used to indicate a threshold value that the signal strength of the cell to which the terminal device switches needs to meet. For example, the terminal device initiates switching when the signal strength of the cell of network device #2 is greater than or equal to the first threshold value.

[0197] As an example but not limitation, information element B may include a second value, which is the time condition for the terminal device to initiate a switch. The terminal device obtains the second value by forwarding it through network device #1, calculates the time to initiate the switch based on the second value, and sends a random access signal for accessing the cell of network device #2 at the time of initiating the switch.

[0198] For example, the second value is a time value, such as in milliseconds. The terminal device multiplies the last digit of identifier #1 or identifier #2 by the second value to obtain the delay time for initiating random access, and initiates switching after the delay time, which may be by sending a random access signal on the random access resource that arrives after the delay time.

[0199] For another example, the second value is an integer value, and the terminal device can determine the random access resource used for sending the random access signal according to the sequence number of the terminal device in the multiple terminal devices of the cell that needs to be switched to the network device #2 and the sum of the integer value. For example, if the sum is 3, the terminal device sends the random access signal in the third time unit including the random access resource after receiving the second value.

[0200] As an example and not limitation, information element B may include a position coordinate range, which may be an absolute position coordinate range or a relative position coordinate range, and this application does not limit this. The terminal device obtains the coordinate range through forwarding by network device #1, and when the terminal device determines that the position of the terminal device is within the position coordinate range, the terminal device initiates a handover, which may be that after the terminal device is within the position coordinate range, the terminal device sends a random access signal on the next random access resource.

[0201] After network device #1 receives message #2 and confirms that network device #2 allows terminal device A and terminal device B to access the cell of network device #2, it sends information for switching cells to terminal device A and terminal device B.

[0202] Figure 4 It is another schematic flowchart of the communication method provided in an embodiment of the present application.

[0203] It should be noted that in order to clearly introduce the solution of this application, Figure 4 In the illustrated embodiment, two terminal devices, terminal device A and terminal device B, are used as examples for explanation, and the solution of the present application can be applied to the case of multiple terminal devices. Figure 4 In the embodiment Figure 3 For the same or similar contents in the embodiments, please refer to the above Figure 3 For the sake of brevity, the description of the embodiments will not be repeated here.

[0204] S410, network device #1 sends information A to terminal device A and terminal device B, where information A is used to indicate identifier #3.

[0205] In one implementation, information A may be cell common or cell specific information, and network device #1 uses information A to notify the terminal devices of the grouping status and the group identifier of each group. Identifier #3 is the group identifier of terminal device group #1 to which terminal devices A and B are located.

[0206] For example, information A divides the terminal device into one or more terminal device groups by indicating the value range of the identifier #1 of the terminal device, where identifier #1 is the identifier of the terminal device in the cell of network device #1. Information A also includes the group identifier of each terminal device group. For example, the terminal devices whose identifier #1 has a value range of x to y are terminal device group #1, and the terminal devices whose identifier #1 has a value range of w to z are terminal device group #2. The cell of network device #1 (i.e., the source cell of terminal device A and terminal device B) whose identifier #1 has a value between x and y includes identifier #1A of terminal device A and identifier #1B of terminal device B, so terminal device A and terminal device B form terminal device group #1. Terminal device A determines that terminal device A belongs to terminal device group #1 based on its identifier #1A in network device #1, so the group identifier of the terminal device group to which terminal device A belongs is identifier #3. Similarly, terminal device B determines that terminal device B belongs to terminal device group #1 according to its identifier #1B in network device #1, so the group identifier of the terminal device group to which terminal device B belongs is identifier #3. This identifier #3 is used for terminal device A and terminal device B to receive information for switching cells sent by network device #1.

[0207] As an example but not limitation, the information A may be a system message of a cell.

[0208] In another implementation, information A is terminal device-specific information, that is, network device #1 notifies terminal device A and terminal device B of the identifier #3 respectively, that is, network device #1 sends information A to terminal device A and terminal device B, specifically, network device #1 sends information A1 to terminal device A, information A1 is used to notify terminal device A of the identifier #3, and network device #1 sends information A2 to terminal device B, information A2 is used to notify terminal device B of the identifier #3. The identifier #3 is used for terminal device A and terminal device B to receive information for switching cells sent by network device #1.

[0209] Terminal device A receives information A1 and determines the identifier #3. Terminal device B receives information A2 and determines the identifier #3.

[0210] As an example but not limitation, information A (such as information A1 or information A2) can be carried in a user equipment-specific (UE-specific) radio resource control (RRC) message of a terminal device (such as terminal device A or terminal device B) that receives information A, or information A can be carried in user equipment-specific (UE-specific) downlink control information (DCI) of the terminal device that receives information A.

[0211] In one implementation, network device #1 may group terminal devices in a cell, and identifier #3 is a group identifier of terminal device group #1 (i.e., an example of a first terminal device group) to which terminal device A and terminal device B belong. After determining the grouping, network device #1 sends information A1 and information A2 to terminal device A and terminal device B, respectively.

[0212] As an example and not limitation, network device #1 may group terminal devices according to locations of the terminal devices and / or bearer characteristics of the terminal devices.

[0213] In another implementation, when network device #1 determines to use common scheduling information (e.g., group common scheduling information, such as information B) or the same information to schedule the information for switching cells of terminal device A and terminal device B, network device #1 sends information A1 and information A2 to terminal device A and terminal device B, respectively, before sending the common scheduling information. Terminal device A receives information A1 and determines identification #3. Terminal device B receives information A2 and determines identification #3. In other words, network device #1 does not group the terminal devices in advance, and after determining that common scheduling information is needed to schedule the information for switching cells of terminal device A and terminal device B, network device #1 notifies terminal device A and terminal device B of identification #3 for receiving information for switching cells. For example, with Figure 3When the embodiment is implemented in combination, the network device #1 can send the information A1 and the information A2 to the terminal device A and the terminal device B respectively after S320, but the present application is not limited thereto.

[0214] Optionally, information A also includes encryption information allocated by network device #1 to terminal device A and terminal device B, for example, the encryption information is a key (or a writing key).

[0215] Network device #1 may allocate a key to each terminal device, that is, network device #1 allocates a key to terminal device A and terminal device B respectively, or network device #1 allocates the same key to terminal device A and terminal device B, that is, network device #1 allocates a key to terminal device group #1. Terminal device A and terminal device B receive information for switching cells according to the key, which can improve the security of the information for switching cells, so as to prevent other terminal devices from reading the information for switching cells of terminal device A and terminal device B.

[0216] S420, network device #1 determines to instruct terminal device A and terminal device B to switch to the cell of network device #2.

[0217] S430, network device #1 sends information B (ie, an example of first information), where information B is used to indicate resource #1 (ie, an example of first resource).

[0218] S440, terminal device A and terminal device B receive information B according to identification #3.

[0219] Information B is used to indicate resource #1, which carries information for switching cells of terminal devices A and B. It can also be said that information B is used for terminal devices A and B to determine information for switching cells, or information B is used for terminal devices in terminal device group #1 to determine information for switching cells.

[0220] In the present application, the resources used to carry information (such as resource #1, resource #2, resource #3) can be one or more of time resources, frequency domain resources, code domain resources or space resources.

[0221] As an example but not limitation, the information B may be carried on a downlink control channel (physical downlink control channel, PDCCH), and / or resource #1 is a downlink shared channel resource (physical downlink shared channel, PDSCH).

[0222] As an example and not limitation, information B includes identifier #3, and terminal device A and terminal device B determine, based on identifier #3, that information B can be used to determine information for switching cells.

[0223] In one implementation, identifier #3 is a scrambling sequence of information bits in information B.

[0224] For example, network device #1 may use identifier #3 to scramble the information bits in information B, and the terminal device may descramble the received information B according to identifier #3 to obtain the information bits in information B.

[0225] For another example, network device #1 can use identifier #3 to scramble the CRC check bits included in the information bits in information B, and the terminal device descrambles the CRC check bits according to identifier #3 to obtain the information bits in information B.

[0226] According to the above scheme, identifier #3 is used as a scrambling code sequence included in information B, which can improve the security of information and make it impossible for devices that do not know identifier #3 to descramble information B, or avoid unnecessary power consumption caused by devices other than the terminal device identified by identifier #3 descrambling information B.

[0227] In another implementation, identifier #3 is carried in a bit field of information B.

[0228] Terminal device A and terminal device B receive the information B, and the bit field in the information B carries the identifier #3, then terminal device A and terminal device B determine that the information B can be used to determine the information for switching cells. If the bit field in the information B does not carry the identifier #3, terminal device A and terminal device B determine that the information B is not used by terminal device A and terminal device B to determine the information for switching cells.

[0229] Depending on the information carried by resource #1, the following two possible steps may be included.

[0230] Maybe one

[0231] S450, network device #1 sends information C (ie, an example of the fourth information) to terminal device A and terminal device B on resource #1.

[0232] Information C includes information for switching cells of terminal devices A and B. That is, information B in S440 indicates that resource #1 is used to carry information for switching cells of terminal devices A and B. Terminal devices A and B receive information for switching cells on resource #1.

[0233] In one implementation, the information C includes common information of the terminal device A and the terminal device B, and the common information is information used for cell switching that is common to the terminal device A and the terminal device B. That is, the terminal device A and the terminal device B share a piece of information used for switching cells.

[0234] The information C may include information element A, which is used to determine the identifier #2A of the terminal device A in the cell of the network device #2 and the identifier #2B of the terminal device B in the cell of the network device #2. The information A may include but is not limited to the following forms:

[0235] Form 1, information element A includes the identifier #2 of terminal device A and terminal device B in the cell of network device #2, and the arrangement order of the identifier #2A and the identifier #2B in information element A can be arranged according to a preset order.

[0236] In form 2, the information element A includes both the identifier #1 of each of the two terminal devices A and B, and the identifiers #2 of the two terminal devices.

[0237] Form 3: Information element A includes a first value, which is used to calculate the identifier #2 of terminal device A and terminal device B.

[0238] The specific method for the terminal device to determine the identifier #2 according to the information element A can refer to the above Figure 3 For the sake of brevity, the description in the embodiments will not be repeated here.

[0239] Optionally, the identification #2 of the terminal device can be encrypted by a dedicated key assigned by the network device #1 to each terminal device. After the terminal device determines the sequence or symbol including the identification #2, the terminal device uses the dedicated key assigned by the network device #1 to decrypt the sequence or the symbol to obtain the identification #2 of the terminal device. By assigning a unique key, it is possible to prevent other terminal devices in the group from reading the identification #2 of the terminal device, thereby improving security.

[0240] Optionally, the information C is the information of the terminal device A and the terminal device B for switching cells scrambled by a public key, that is, the information C is the information of the terminal device group #1 for switching cells scrambled by a group key. The public key is the key assigned by the network device #1 to the terminal device A and the terminal device B, and the group key is the key assigned by the network device #1 to the terminal device group #1 consisting of the terminal device A and the terminal device B.

[0241] For example, the information used for switching cells shared by the terminal device A and the terminal device B can be scrambled by the public key assigned by the network device #1 to the terminal device A and the terminal device B, or the information used for switching cells of the terminal device group #1 can be scrambled by the group key. The terminal device decrypts or descrambles the information C according to the public key or the group key to obtain the information used for switching cells.

[0242] It can prevent terminal devices in other terminal device groups from obtaining the information of terminal device A and terminal device B used for switching cells, thereby improving information security.

[0243] Optionally, network device #1 performs integrity protection on the public information for switching cells. The public information for switching cells that is integrity protected can only be correctly received by terminal device A and terminal device B, and cannot be correctly received by devices other than terminal device A and terminal device B. Network device #1 can notify terminal device A and terminal device B of the integrity protection algorithm in advance.

[0244] As an example but not limitation, the information C may be carried in an RRC reconfiguration message.

[0245] In another implementation manner, information C includes two dedicated information, and the two dedicated information correspond to terminal device A and terminal device B respectively. The dedicated information of terminal device A is information used by terminal device A to switch cells, and the dedicated information of terminal device B is information used by terminal device B to switch cells. The information used by terminal device A to switch cells and the information used by terminal device B to switch cells are carried on resource #1 in one or more forms of code division multiplexing, frequency division multiplexing, or time division multiplexing.

[0246] For example, the information used by terminal device A to switch cells and the information used by terminal device B to switch cells are carried on resource #1 in the form of code division multiplexing. Terminal device A receives the symbol on resource #1, multiplies it by the orthogonal code assigned to terminal device A, and obtains the symbol including the information used by terminal device A to switch cells. Similarly, terminal device B can obtain the information used by terminal device B to switch cells after receiving the orthogonal code assigned to terminal device B.

[0247] Optionally, the orthogonal code of the terminal device may be a key assigned to it by the network device #1, and the terminal device obtains information for switching cells after decoding and multiplexing according to the assigned key.

[0248] For another example, the information used to switch cells of terminal device A and the information used to switch cells of terminal device B are carried on resource #1 in the form of frequency division multiplexing, and the information used to switch cells of each terminal device is mapped to different frequency band resources of resource #1 according to predefined rules. The terminal device determines the information used to switch cells carried by the terminal device on resource #1 according to the predefined rules.

[0249] Optionally, the information of each terminal device for switching cells is scrambled by a key allocated to the terminal device by network device #1, which can improve confidentiality and prevent other terminal devices from obtaining the terminal device's dedicated information for switching cells.

[0250] In another implementation, the information C includes both common information and two dedicated information, wherein the common information is common information for cell switching between terminal device A and terminal device B. Each dedicated information is dedicated information for cell switching for a corresponding terminal device.

[0251] For example, the public information may include but is not limited to the target cell ID and / or the target cell system information, etc. The dedicated information may include the corresponding terminal device ID #2 and / or the user equipment dedicated CSI-RS configuration information, etc., but the present application is not limited thereto.

[0252] As an example, the information C may also include information element B, which is used to indicate the switching conditions of terminal device A and terminal device B. The information element B may be included in the dedicated information of each terminal device, or may be the public information of the terminal device. This application does not limit this. That is, information element B is used to indicate the conditions for initiating switching of terminal device A and terminal device B. The condition for initiating switching may be the condition that the terminal device sends a random access signal for switching cells to network device #2, but this application is not limited to this. Among them, the switching condition may include, but is not limited to, one or more of the following:

[0253] A time condition, which is used to indicate the time when the terminal device initiates the switching;

[0254] A location condition, where the location condition is used to indicate the location where the terminal device initiates the handover;

[0255] The first threshold value is used to indicate a threshold value that the signal strength of the cell to which the terminal device switches needs to meet. For example, the terminal device initiates switching when the signal strength of the cell of network device #2 is greater than or equal to the first threshold value.

[0256] The specific implementation of the information element B can refer to the above Figure 3 For the sake of brevity, the description in will not be repeated here.

[0257] Optionally, terminal device A and terminal device B may have the same switching condition or different switching conditions, which is not limited in this application.

[0258] Optionally, information C may also include information for switching of multiple target cells, that is, information C may include information of the cell of network device #2 and a switching condition for switching to the cell, and may also include information of the cell of network device #3 and a switching condition for switching to the cell. When the terminal device meets the switching condition of one of the cells, the terminal device initiates a switch and switches to the cell that meets the switching condition.

[0259] According to the above scheme, by scheduling the first resource that carries the information of switching cells for multiple terminal devices through public signaling such as the first information, it is possible to reduce signaling overhead and improve resource utilization.

[0260] Maybe two

[0261] S450, network device #1 sends two information D (ie, an example of the second information) on resource #1, and the two information D correspond to terminal device A and terminal device B one by one.

[0262] Terminal device A receives information D of terminal device A on resource #1, recorded as information D1, and terminal device B receives information D of terminal device B on resource #1, recorded as information D2. Information D may include the identifier of the terminal device corresponding thereto, for example, information D may include the identifier #1 of the terminal device corresponding thereto, or the identifier or serial number of the terminal device in a terminal device group or multiple terminal devices. The terminal device may determine the information D corresponding to the terminal device according to the identifier of the terminal device, so that other terminal devices cannot decode the information D of the terminal device.

[0263] Information D is used to indicate resource #2, and resource #2 is used to carry the information for switching cells of the terminal device corresponding to the information D. For example, resource #2 indicated by information D1 of terminal device A can be recorded as resource #2A, which is used to carry the information for switching cells of terminal device A, and resource #2 indicated by information D2 of terminal device B can be recorded as resource #2B, which is used to carry the information for switching cells of terminal device B.

[0264] According to the above scheme, by carrying the control information (i.e., the second information) for scheduling the information for switching cells of each terminal device in the downlink shared channel, and scheduling the resources for carrying the second information of multiple terminal devices through the first information, the signaling overhead of the downlink control channel can be reduced, the resource utilization of the downlink control channel can be improved, and the workload of modifying the existing technology can be reduced (compared with the possibility of using a public key to encrypt and decrypt the information C carrying the information for switching cells in the first scheme, the information for switching cells in the second scheme can continue to use the existing encryption and decryption mechanism, and no additional encryption and decryption is required for information D, which can avoid the introduction of a new encryption and decryption mechanism (such as encryption and decryption using the key of the terminal device group (also called a public key)). Since the encryption and decryption mechanism is designed to modify the underlying algorithm, the scheme makes little change to the existing communication system, and accelerates the progress of communication standardization. In addition, the scheme does not need to send too large messages, reduces the difficulty of decoding, and improves the robustness of decoding. In the case of poor channel quality, the terminal device can still correctly decode and obtain the switching command.

[0265] S460, network device #1 sends information for switching cells of terminal device A on resource #2A, and sends information for switching cells of terminal device B on resource #2B.

[0266] S470, terminal device A initiates random access according to the information of terminal device A used for switching cells, and terminal device B initiates random access according to the information of terminal device B used for switching cells.

[0267] After receiving the information of the terminal device A for switching the cell on resource #2A, the terminal device A initiates random access for switching the cell according to the information of the terminal device A for switching the cell. For example, the terminal device A sends a random access signal to the target cell, and the target cell is the cell indicated by the information for switching the cell. After receiving the information of the terminal device B for switching the cell on resource #2B, the terminal device B initiates random access for switching the cell according to the information of the terminal device B for switching the cell. The cells switched to by the terminal device A and the terminal device B may be the same cell or different cells, which is not limited in this application.

[0268] As an example, the information D may also include information element B, which is used to indicate the switching condition of the corresponding terminal device. That is, information element B is used to indicate the condition for the corresponding terminal device to initiate the switching of the cell. The condition for initiating the switching of the cell may be the condition that the terminal device sends a random access signal for switching the cell to the network device #2, but the present application is not limited thereto. Among them, the switching condition may include but is not limited to one or more of the following:

[0269] A time condition, which is used to indicate the time when the terminal device initiates the switching;

[0270] A location condition, where the location condition is used to indicate the location where the terminal device initiates the handover;

[0271] The first threshold value is used to indicate a threshold value that the signal strength of the cell to which the terminal device switches needs to meet. For example, the terminal device initiates switching when the signal strength of the cell of network device #2 is greater than or equal to the first threshold value.

[0272] The specific implementation of the information element B can refer to the above Figure 3 For the sake of brevity, the description in will not be repeated here.

[0273] Optionally, the information D may also include information for switching of multiple target cells. For example, the information D may include information of the cell of network device #2 and a switching condition for switching to the cell, and may also include information of the cell of network device #3 and a switching condition for switching to the cell. When the terminal device meets the switching condition of one of the cells, the terminal device initiates a switch and switches to the cell that meets the switching condition.

[0274] As an example but not limitation, the information C and / or the information D is a handover command.

[0275] Optionally, information C and / or information D may also include but are not limited to one or more of the following:

[0276] The identifier of the cell of network device #2 (i.e., the target cell to which terminal device A and terminal device B switch), a set of random access resources, the correspondence between random access resources and synchronization message blocks (synchronization signal block, SSB), channel state information reference signal (channel state information reference signal, CSI-RS) configuration information or system information of the target cell.

[0277] S470, terminal device A initiates handover to the cell of network device #2 according to the information for switching cells, and / or terminal device B initiates handover to the cell of network device #2 according to the information for switching cells.

[0278] For example, the terminal device sends a random access signal to the cell of network device #2, and the random access signal is used to switch to the cell of network device #2.

[0279] In one implementation, the terminal device (terminal device A and / or terminal device B) initiates switching to the cell of network device #2 after receiving the information for switching the cell.

[0280] In another implementation, the information for switching cells includes switching conditions. After the terminal device (terminal device A and / or terminal device B) determines that the switching conditions of the cell of network device #2 are met, it initiates switching to the cell of network device #2.

[0281] Optionally, after completing the random access process, the terminal device sends an RRC reconfiguration completion message to network device #2, and the terminal device completes the switching from the cell of network device #1 (source cell) to the cell of network device #2 (target cell), but the present application is not limited to this.

[0282] In one embodiment of the present application, Figure 4 The embodiment shown is Figure 3 The embodiments shown can be implemented separately or in combination. For example, in the case of combined implementation, after network device #1 confirms that network device #2 allows terminal device A and terminal device B to switch to the cell of network device #2, network device #1 instructs terminal device A and terminal device B to switch to the cell of network device #2, for example, Figure 5 shown. Figure 5 In the embodiment shown, Figure 4 Example Figure 3 The same or similar parts in the embodiments can refer to the above Figure 3 , Figure 4 For the sake of brevity, the description is not repeated here.

[0283] It should be noted that in the specific implementation, you can choose Figure 3 , Figure 4 or Figure 5 The present application does not limit this. For example, S510 can be executed before S550, or after S520 or S540. It should be understood that the specific implementation of executing some of the steps in the diagram or adjusting the order of the steps falls within the protection scope of the present application.

[0284] Above, combined Figures 3 to 5 The method provided by the embodiment of the present application is described in detail. Figures 6 to 8 The device provided in the embodiments of the present application is described in detail.

[0285] Figure 6 is a schematic block diagram of a communication device provided in an embodiment of the present application. Figure 6 As shown, the communication device 1500 may include a processing unit 1510 and a transceiver unit 1520 .

[0286] In one possible design, the communication device 1500 may correspond to the terminal device in the above method embodiment, for example, it may be terminal device A or terminal device B, or a chip configured in (or used for) terminal device A or a chip in terminal device B.

[0287] It should be understood that the communication device 1500 may correspond to the terminal device in the method 400 or 500 according to the embodiment of the present application, and the communication device 1500 may include a device for executing Figure 4 , Figure 5 The units of the method performed by the terminal device in the methods 400 and 500 in the communication device 1500 are respectively for implementing Figure 4 , Figure 5 The corresponding processes of methods 400 and 500.

[0288] Wherein, when the communication device 1500 is used to execute Figure 4 In the method 400, the transceiver unit 1520 can be used to execute S410, S430, S450, S460 in the method 400, and the processing unit 1510 can be used to execute S440, S470 in the method 40. When the communication device 1500 is used to execute Figure 5 In the method 500, the transceiver unit 1520 may be used to execute S510, S550, S570, and S580 in the method 500, and the processing unit 1510 may be used to execute S560 and S590 in the method 500. It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0289] It should also be understood that when the communication device 1500 is a chip configured in (or used in) a terminal device, the transceiver unit 1520 in the communication device 1500 can be an input / output interface or circuit of the chip, and the processing unit 1510 in the communication device 1500 can be a processor in the chip.

[0290] Optionally, the communication device 1500 may further include a processing unit 1510, which may be used to process instructions or data to implement corresponding operations.

[0291] Optionally, the communication device 1500 may further include a storage unit, which may be used to store instructions or data. The processing unit 1510 may execute the instructions or data stored in the storage unit to enable the communication device to perform corresponding operations. The transceiver unit 1520 in the communication device 1500 may correspond to Figure 7 The transceiver 1610 in the terminal device 1600 shown in FIG. 1 may correspond to the storage unit Figure 7 The memory in the terminal device 1600 shown in FIG.

[0292] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0293] It should also be understood that when the communication device 1500 is a terminal device, the transceiver unit 1520 in the communication device 1500 can be implemented through a communication interface (such as a transceiver or an input / output interface), for example, corresponding to Figure 7 The transceiver 1610 in the terminal device 1600 shown in FIG. 1 may be implemented by at least one processor, for example, corresponding to Figure 7The processor 1620 in the terminal device 1600 shown in the figure, the processing unit 1510 in the communication device 1500 can be implemented by at least one logic circuit.

[0294] In another possible design, the communication device 1500 may correspond to the network device #1 in the above method embodiment, for example, it may be the network device #1, or a chip configured in (or used for) the network device #1.

[0295] It should be understood that the communication device 1500 may correspond to the network device in the method 300, 400, 500 according to the embodiment of the present application, and the communication device 1500 may include a Figure 3 , Figure 4 , Figure 5 The units of the method performed by the network device in the methods 300, 400, and 500. In addition, the units in the communication device 1500 and the above-mentioned other operations and / or functions are respectively for implementing Figure 3 , Figure 4 , Figure 5 The corresponding processes of methods 300, 400, and 500.

[0296] Wherein, when the communication device 1500 is used to execute Figure 3 In the method 300, the transceiver unit 1520 can be used to execute S320 and S330 in the method 300, and the processing unit 1510 can be used to execute S310 in the method 300. When the communication device 1500 is used to execute Figure 4 In the method 400, the transceiver unit 1520 can be used to execute S410, S430, S450, S460 in the method 400, and the processing unit 1510 can be used to execute S420 in the method 400. When the communication device 1500 is used to execute Figure 5 In the method 500, the transceiver unit 1520 may be used to execute S510, S550, S570, and S580 in the method 500, and the processing unit 1510 may be used to execute S520 in the method 500. It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0297] It should also be understood that when the communication device 1500 is a chip configured in (or used for) network device #1, the transceiver unit in the communication device 1500 is the input / output interface or circuit in the chip, and the processing unit 1510 in the communication device 1500 can be the processor in the chip.

[0298] Optionally, the communication device 1500 may further include a processing unit 1510, which may be used to process instructions or data to implement corresponding operations.

[0299] Optionally, the communication device 1500 may further include a storage unit, which may be used to store instructions or data, and the processing unit may execute the instructions or data stored in the storage unit to enable the communication device to perform corresponding operations. Figure 8 Memory in network device 1700 shown in FIG.

[0300] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0301] It should also be understood that when the communication device 1500 is network device #1, the transceiver unit 1520 in the communication device 1500 can be implemented through a communication interface (such as a transceiver or an input / output interface), for example, corresponding to Figure 8 The transceiver 1710 in the network device 1700 shown in FIG. 1 may be implemented by at least one processor, for example, corresponding to Figure 8 The processor 1720 in the network device 1700 shown in FIG. 1 and the processing unit 1510 in the communication apparatus 1500 may be implemented by at least one logic circuit.

[0302] In another possible design, the communication device 1500 may correspond to the network device #2 in the above method embodiment, for example, it may be the network device #2, or a chip configured in (or used for) the network device #2.

[0303] It should be understood that the communication device 1500 may correspond to the network device in the method 300 or 500 according to the embodiment of the present application, and the communication device 1500 may include a device for executing Figure 3 , Figure 5 The units of the method performed by the network device in the method 300 and 500 in the communication device 1500 are respectively for implementing Figure 3 , Figure 5 The corresponding processes of methods 300 and 500.

[0304] Wherein, when the communication device 1500 is used to execute Figure 3 In the method 300, the transceiver unit 1520 can be used to execute S320 and S330 in the method 300. When the communication device 1500 is used to execute Figure 5In the method 500, the transceiver unit 1520 may be used to execute S530 and S540 in the method 500. It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0305] It should also be understood that when the communication device 1500 is a chip configured in (or used for) network device #2, the transceiver unit in the communication device 1500 is the input / output interface or circuit of the chip, and the processing unit 1510 in the communication device 1500 can be the processor in the chip.

[0306] Optionally, the communication device 1500 may further include a processing unit 1510, which may be used to process instructions or data to implement corresponding operations.

[0307] Optionally, the communication device 1500 may further include a storage unit, which may be used to store instructions or data, and the processing unit may execute the instructions or data stored in the storage unit to enable the communication device to perform corresponding operations. Figure 8 Memory in network device 1700 shown in FIG.

[0308] It should be understood that the specific process of each unit executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0309] It should also be understood that when the communication device 1500 is network device #2, the transceiver unit 1520 in the communication device 1500 can be implemented through a communication interface (such as a transceiver or an input / output interface), for example, corresponding to Figure 8 The transceiver 1710 in the network device 1700 shown in FIG. 1 may be implemented by at least one processor, for example, corresponding to Figure 8 The processor 1720 in the network device 1700 shown in FIG. 1 and the processing unit 1510 in the communication apparatus 1500 may be implemented by at least one logic circuit.

[0310] Figure 7 1 is a schematic diagram of the structure of a terminal device 1500 provided in an embodiment of the present application. The terminal device 1600 can be applied to Figure 1 , Figure 2In the system shown, the functions of the terminal device in the above method embodiment are performed. As shown in the figure, the terminal device 1600 includes a processor 1620 and a transceiver 1610. Optionally, the terminal device 1600 also includes a memory. Among them, the processor 1620, the transceiver 1610 and the memory can communicate with each other through an internal connection path to transmit control and / or data signals, the memory is used to store a computer program, and the processor 1620 is used to execute the computer program in the memory to control the transceiver 1610 to send and receive signals.

[0311] The processor 1620 and the memory may be combined into a processing device, and the processor 1620 is used to execute the program code stored in the memory to implement the above functions. In specific implementation, the memory may also be integrated into the processor 1620, or independent of the processor 1620. The processor 1620 may be combined with the memory to form a processing device. Figure 6 The processing units in correspondence.

[0312] The transceiver 1610 can be used with Figure 6 The transceiver 1610 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). The receiver is used to receive signals, and the transmitter is used to transmit signals.

[0313] It should be understood that Figure 7 The terminal device 1600 shown can implement Figure 4 , Figure 5 The method embodiment shown involves various processes of the terminal device. The operations and / or functions of each module in the terminal device 1600 are respectively to implement the corresponding processes in the above method embodiment. For details, please refer to the description in the above method embodiment. To avoid repetition, the detailed description is appropriately omitted here.

[0314] The processor 1620 can be used to execute the actions implemented by the terminal device in the previous method embodiment, and the transceiver 1610 can be used to execute the actions of the terminal device sending to or receiving from the network device in the previous method embodiment. Please refer to the description in the previous method embodiment for details, which will not be repeated here.

[0315] Optionally, the terminal device 1600 may further include a power supply for providing power to various devices or circuits in the terminal device.

[0316] In addition, in order to make the functions of the terminal device more complete, the terminal device 1600 may also include one or more of an input unit, a display unit, an audio circuit, a camera, and a sensor, and the audio circuit may also include a speaker, a microphone, and the like.

[0317] Figure 8is a schematic diagram of the structure of a network device provided in an embodiment of the present application. The network device 1700 can be applied to Figure 1 , Figure 2 In the system shown, the functions of the network device in the above method embodiment are performed. For example, it can be a schematic diagram of the relevant structure of the network device. For example, the network device 1700 can be Figure 1 The base station in Figure 2 The invention relates to satellites in the invention, but the application is not limited thereto.

[0318] It should be understood that Figure 8 The network device 1700 shown is capable of implementing Figure 3 , Figure 4 , Figure 5 The method embodiment shown involves various processes of the network device. The operations and / or functions of each module in the network device 1700 are respectively to implement the corresponding processes in the above method embodiment. For details, please refer to the description in the above method embodiment. To avoid repetition, the detailed description is appropriately omitted here.

[0319] It should be understood that Figure 8 The network device 1700 shown is only one possible architecture of the network device and should not constitute any limitation to the present application. The method provided in the present application can be applied to network devices of other architectures. For example, network devices including CU, DU and AAU, etc. The present application does not limit the specific architecture of the network device.

[0320] An embodiment of the present application also provides a processing device, including a processor and an interface; the processor is used to execute the method in any of the above method embodiments.

[0321] It should be understood that the above-mentioned processing device can be one or more chips. For example, the processing device can be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD) or other integrated chips.

[0322] In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software. The steps of the method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software modules in a processor for execution. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it is not described in detail here.

[0323] It should be noted that the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined and performed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0324] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0325] According to the method provided in the embodiment of the present application, the present application also provides a computer program product, the computer program product comprising: computer program code, when the computer program code is executed by one or more processors, the device including the processor executes Figure 3 , Figure 4 , Figure 5 The method in the illustrated embodiment.

[0326] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable storage medium, the computer-readable storage medium stores a program code, when the program code is executed by one or more processors, the device including the processor executes Figure 3 , Figure 4 , Figure 5 The method in the illustrated embodiment.

[0327] According to the method provided in the embodiment of the present application, the present application also provides a system, which includes the aforementioned one or more network devices. The system may further include the aforementioned one or more terminal devices.

[0328] The network devices in the above-mentioned various device embodiments completely correspond to the network devices or terminal devices in the terminal devices and method embodiments, and the corresponding modules or units perform the corresponding steps. For example, the communication unit (transceiver) performs the steps of receiving or sending in the method embodiment, and other steps except sending and receiving can be performed by the processing unit (processor). The functions of the specific units can refer to the corresponding method embodiments. Among them, the processor can be one or more.

[0329] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disc (SSD)).

[0330] The network devices in the above-mentioned various device embodiments completely correspond to the network devices or terminal devices in the terminal devices and method embodiments, and the corresponding modules or units perform the corresponding steps. For example, the communication unit (transceiver) performs the steps of receiving or sending in the method embodiment, and other steps except sending and receiving can be performed by the processing unit (processor). The functions of the specific units can refer to the corresponding method embodiments. Among them, the processor can be one or more.

[0331] The terms "component", "module", "system", etc. used in this specification are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program and / or a computer. By way of illustration, both applications running on a computing device and a computing device can be components. One or more components may reside in a process and / or an execution thread, and a component may be located on a computer and / or distributed between two or more computers. In addition, these components may be executed from various computer-readable media having various data structures stored thereon. Components may, for example, communicate through local and / or remote processes according to signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system and / or a network, such as the Internet interacting with other systems through signals).

[0332] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0333] 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.

[0334] 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 the units is only a logical function division. There may be other division methods in actual implementation, such as 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 through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0335] 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.

[0336] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0337] In the above embodiments, the functions of each functional unit can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When the computer program instructions (programs) are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, data center, etc. that contains one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0338] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0339] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for group switching, characterized in that: include: A first terminal device receives first information from a first network device, where the first information is used to indicate a first resource, and the first resource is used to carry fourth information, where the fourth information is information for multiple terminal devices to switch cells, wherein the first terminal device is one of the multiple terminal devices; The first terminal device receives the fourth information on the first resource; The fourth information includes a plurality of second identifiers, the plurality of second identifiers corresponding to the plurality of terminal devices, wherein the second identifier is an identifier of the corresponding terminal device in a cell of a second network device, and the cell of the second network device is a cell to which the plurality of terminal devices are to be switched; The fourth information also includes multiple first identifiers corresponding to the multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices through the multiple first identifiers, wherein the first identifier is the identifier of the terminal device in the cell of the first network device.

2. The method according to claim 1, characterized in that: The first information is carried in a downlink control channel, and / or the fourth information is carried in a downlink shared channel.

3. The method according to claim 1, characterized in that The fourth information is encrypted by encryption information, and the encryption information is used by the multiple terminal devices to detect the fourth information.

4. The method according to claim 1, characterized in that The fourth information includes public information and / or multiple dedicated information, the public information is the information common to the multiple terminal devices for switching cells, the multiple dedicated information corresponds to the multiple terminal devices, and each piece of dedicated information is the information dedicated to the corresponding terminal device for switching cells.

5. The method according to claim 1, characterized in that The multiple second identifiers are arranged in a preset order in the fourth information.

6. The method according to any one of claims 1 to 5, characterized in that The multiple terminal devices belong to a first terminal device group, and the first information includes an identifier of the first terminal device group.

7. The method according to claim 6, characterized in that The identifier of the first terminal device group is a scrambling code sequence of information bits in the first information, or the identifier of the first terminal device group is carried in an indication field in the first information.

8. A method for group switching, characterized in that: include: The first network device sends first information, where the first information is used to indicate a first resource, where the first resource is used to carry fourth information, where the fourth information is information for multiple terminal devices to switch cells; The first network device sends the fourth information on the first resource; The fourth information includes a plurality of second identifiers, the plurality of second identifiers corresponding to the plurality of terminal devices, wherein the second identifier is an identifier of the corresponding terminal device in a cell of a second network device, and the cell of the second network device is a cell to which the plurality of terminal devices are to be switched; The fourth information also includes multiple first identifiers, the multiple first identifiers correspond to the multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices through the multiple first identifiers, wherein the first identifier is the identifier of the terminal device in the cell of the first network device.

9. The method according to claim 8, characterized in that The first information is carried in a downlink control channel, and / or the fourth information is carried in a downlink shared channel.

10. The method according to claim 8, characterized in that The fourth information is encrypted by encryption information, and the encryption information is used by the multiple terminal devices to detect the fourth information.

11. The method according to claim 8, characterized in that The fourth information includes public information and / or multiple dedicated information, the public information is the information of the switching cell common to the multiple terminal devices, the multiple dedicated information corresponds to the multiple terminal devices, and each of the dedicated information is the information of the switching cell dedicated to the corresponding terminal device.

12. The method according to claim 8, characterized in that The multiple second identifiers are arranged in a preset order in the fourth information.

13. The method according to any one of claims 8 to 12, characterized in that The multiple terminal devices belong to a first terminal device group, and the first information includes an identifier of the first terminal device group.

14. The method according to claim 13, characterized in that The identifier of the first terminal device group is a scrambling code sequence of information bits in the first information, or the identifier of the first terminal device group is carried in an indication field in the first information.

15. The method according to any one of claims 8 to 12, characterized in that The method further comprises: The first network device sends a first message to the second network device, where the first message is used to request that the multiple terminal devices be switched to the cell of the second network device, and the first message includes a first identifier of each of the multiple terminal devices, where the first identifier is an identifier of the terminal device in the cell of the first network device.

16. A method for group switching, characterized in that: include: A first network device sends first information, where the first information is used to indicate a first resource, where the first resource is used to carry a plurality of second information, where the plurality of second information corresponds to a plurality of terminal devices, and each second information is used to indicate a second resource that carries third information of the corresponding terminal device, where the third information is information for switching a cell; The first network device sends, on each of the second resources, information for switching cells of the corresponding terminal device; The method further comprises: The first network device receives a second message from a second network device, where the second message is used to indicate a plurality of second identifiers corresponding to the plurality of terminal devices, wherein the second identifier is an identifier of the corresponding terminal device in a cell of the second network device; The second message includes multiple first identifiers and multiple second identifiers, the multiple first identifiers correspond to the multiple second identifiers, and the multiple second identifiers correspond to the multiple terminal devices through the multiple first identifiers, wherein the first identifier is the identifier of the terminal device in the cell of the first network device.

17. The method according to claim 16, characterized in that The method may further comprise one or more of the following: The first information is carried in a downlink control channel; The multiple second information are carried in a downlink shared channel; The third information is carried in the downlink shared channel.

18. The method according to claim 16 or 17, characterized in that The multiple terminal devices belong to a first terminal device group, and the first information includes an identifier of the first terminal device group.

19. The method according to claim 18, characterized in that The identifier of the first terminal device group is a scrambling code sequence of information bits in the first information, or the identifier of the first terminal device group is carried in an indication field in the first information.

20. The method according to claim 16 or 17, characterized in that The method further comprises: The first network device sends a first message to the second network device, where the first message is used to request that the multiple terminal devices be switched to the cell of the second network device, and the first message includes a first identifier of each of the multiple terminal devices, where the first identifier is an identifier of the terminal device in the cell of the first network device.

21. The method according to claim 16 or 17, characterized in that The second message includes: The multiple second identifiers are arranged in a preset order in the second message.

22. A computer-readable storage medium, characterized in that: The invention comprises a computer program which, when executed by one or more processors, causes a device comprising the processor to perform the method as claimed in any one of claims 1 to 21.

23. A chip, characterized in that: comprising at least one processor and a communication interface; The communication interface is used to receive a signal input into the chip or a signal output from the chip, and the processor communicates with the communication interface and is used to implement the method according to any one of claims 1 to 21 through a logic circuit or executing code instructions.

24. A communication device, characterized in that: comprising at least one processor coupled to the memory; The memory is used to store programs or instructions; The at least one processor is configured to execute the program or instruction so that the apparatus implements the method according to any one of claims 1 to 21.

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