CN112312488B

CN112312488B - Information transmission method, device and system

Info

Publication number: CN112312488B
Application number: CN201910702898.XA
Authority: CN
Inventors: 耿婷婷; 张宏平
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2022-09-23
Anticipated expiration: 2039-07-31
Also published as: CN112312488A; WO2021018133A1

Abstract

The application provides a method, a device and a system for transmitting information, which can reduce data interference. The method comprises the following steps: the first device sends first indication information to the second device, wherein the first indication information is used for indicating the second device to configure a BWP (bandwidth provider profile) different from a first bandwidth part BWP (bandwidth provider profile) for the terminal device, and the first BWP is the BWP configured for the terminal device by the first device; the first device receives second indication information from the second device, wherein the second indication information is used for indicating a second BWP configured for the terminal device by the second device, and the first BWP is different from the second BWP; and the first equipment sends second indication information to the terminal equipment. The method can be used for a switching scene in which the service equipment of the terminal equipment is switched from the first equipment to the second equipment.

Description

Information transmission method, device and system

Technical Field

The present application relates to the field of communications, and more particularly, to a method, apparatus, and system for transmitting information in the field of communications.

Background

In the existing communication network, when a terminal device moves from the coverage of a current network device (first device) to the coverage of another network device (second device), a communication link needs to be handed over (handoff) in order to ensure the communication quality. In order to avoid interruption of a communication link in a handover process, a terminal device may be connected to a first device and a second device at the same time, but when the first device and the second device are the same-frequency devices, one terminal device and two devices transmit data at the same frequency at the same time, which may cause serious interference, thereby causing reduction in transmission performance.

Disclosure of Invention

The application provides a method, a device and a system for transmitting information, which can reduce interference and are beneficial to improving transmission performance.

In a first aspect, a method for transmitting information is provided, including: a first device sends first indication information to a second device, wherein the first indication information is used for indicating the second device to configure a terminal device with a BWP different from a first bandwidth part BWP, and the first BWP is the BWP configured by the first device for the terminal device; the first device receives second indication information from the second device, where the second indication information is used to indicate a second BWP configured for the terminal device by the second device, and the first BWP is different from the second BWP; and the first equipment sends the second indication information to the terminal equipment.

Therefore, in this embodiment, when the terminal device simultaneously transmits data with the first device and the second device, the first device instructs the second device to configure the terminal device with a BWP different from the first BWP configured for the terminal device by the first device through the first indication information, so that the second device can configure a second BWP for the terminal device according to the first indication information and send second indication information to the first device, and the second indication information can indicate the second BWP, and the first BWP is different from the second BWP, so that the terminal device can be prevented from transmitting data with the first device and the second device at the same BWP, interference can be reduced, and transmission performance can be improved.

Alternatively, the first BWP may be one or more BWPs, for example, when the first BWP is one BWP, the first BWP may be a BWP currently activated by the first device for the terminal device to transmit data, or the first BWP may be a dedicated BWP configured by the first device for the terminal device, and for example, when the first BWP is multiple BWPs, the first BWP may be a dedicated BWP configured by the first device for the terminal device. The second BWP may also be one or more BWPs, for example, when the second BWP is one BWP, the second BWP may be a first activated BWP configured by the second device for the terminal device or the second BWP may be a dedicated BWP configured by the second device for the terminal device, or when the second BWP is multiple, the second BWP may be a dedicated BWP configured by the second device for the terminal device.

In some possible implementations, the first BWP is a currently activated BWP for the terminal device to transmit data, and the currently activated BWP for the terminal device is not replaced by the first device until the terminal device is completely switched. In this way, the second device may be prevented from configuring the terminal device with the same BWP as the first BWP.

In some possible implementations, the second BWP is a dedicated BWP configured for the terminal device by the second device, where the dedicated BWP includes a first activated BWP configured for the terminal device by the second device. The first activated BWP is used for the terminal device to initiate random access to the second device.

In some possible implementations, the first device is a source distribution unit DU, the second device is a central unit CU, and the source DU and the CU both belong to a same network device. Optionally, the source DU, the target DU, and the CU all belong to one network device, the DU currently serving the terminal device is the source DU, and the terminal device is to switch to the target DU.

In some possible implementations, the first device is a source DU, and the second device is a target CU; the sending, by the first device, first indication information to a second device includes: the source DU sends the first indication information to the target CU through a source CU, and the source DU and the source CU belong to source network equipment; the first device receives second indication information from a second device, and the second indication information comprises: and the source DU receives the second indication information sent by the target CU through the source CU, wherein the target CU belongs to the target network equipment. Optionally, the target DU and the target CU belong to a target network device. The terminal device needs to switch from a source DU under the source network device to a target DU under the target network device.

In some possible implementations, the first BWP is a dedicated BWP configured by the first device for the terminal device. In this way, when the first BWP is the dedicated BWP configured for the terminal device by the first device, the first device does not activate any of the dedicated BWPs, which is the same as the BWP configured for the terminal device by the second device, and thus interference can be avoided.

In a second aspect, a method for transmitting information is provided, including: the method comprises the steps that a second device receives first indication information from a first device, wherein the first indication information is used for indicating the second device to configure a BWP (BWP) different from a first BWP (BWP) for a terminal device, and the first BWP is the BWP configured for the terminal device by the first device;

and the second device sends second indication information to the first device according to the first indication information, wherein the second indication information is used for indicating a second BWP configured for the terminal device by the second device, and the first BWP is different from the second BWP.

In some possible implementations, the first BWP is a currently activated BWP for the terminal device to transmit data, and the currently activated BWP for the terminal device is not replaced by the first device until the terminal device is completely switched.

In some possible implementations, the second BWP is a dedicated BWP configured for the terminal device by the second device, where the dedicated BWP includes a first activated BWP configured for the terminal device by the second device.

In some possible implementations, the first device is a source DU, the second device is a central unit CU, and the source DU and the CU both belong to a same network device.

In some possible implementations, the first device is a source distribution unit, DU, and the second device is a target CU;

the sending, by the second device, second indication information to the first device according to the first indication information includes:

and the target CU sends the second indication information to the source DU through the source CU, the source DU and the source CU belong to source network equipment, and the target CU belongs to target network equipment.

In some possible implementations, the first BWP is a dedicated BWP configured by the first device for the end device.

In a third aspect, a method for transmitting information is provided, including:

a first device sends first indication information to a second device, wherein the first indication information is used for indicating the second device to configure a terminal device with a BWP different from a first bandwidth part BWP, and the first BWP is the BWP configured by the first device for the terminal device; the second device sends second indication information to the first device according to the first indication information, where the second indication information is used to indicate a second BWP configured for the terminal device by the second device, and the first BWP is different from the second BWP; and the first equipment sends the second indication information to the terminal equipment.

In some possible implementations, the first device is a source distribution unit DU, the second device is a central unit CU, and the source DU and the CU both belong to a same network device.

In some possible implementations, the first device is a source DU, and the second device is a target CU;

the sending, by the first device, first indication information to a second device includes:

the source DU sends the first indication information to the target CU through a source CU, and the source DU and the source CU belong to source network equipment;

the second device sends second indication information to the first device according to the first indication information, and the second indication information comprises:

and the target CU sends the second indication information to the source DU through the source CU, and the target CU belongs to the target network equipment.

In some possible implementations, the first BWP is a dedicated BWP configured by the first device for the terminal device.

In a fourth aspect, the present application provides an apparatus for transmitting information, for implementing the method in the first aspect and/or any possible implementation manner thereof. The apparatus may be a network device, an apparatus in a network device, or an apparatus capable of being used with a network device. In one design, the apparatus may include a module corresponding to one for performing the method/operation/step/action described in the first aspect and/or any possible implementation manner thereof, and the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a transmitting unit and a receiving unit.

In a fifth aspect, the present application provides an apparatus for transmitting information, which is configured to implement the method in the second aspect and/or any possible implementation manner thereof. The device may be a network device, a device in the network device, or a device capable of being used in cooperation with the network device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the second aspect and/or any possible implementation manner thereof, and the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a transmitting unit and a receiving unit.

In a sixth aspect, the present application provides an apparatus for transmitting information, the apparatus comprising a processor configured to implement the method described in the first aspect and/or any possible implementation manner thereof. The apparatus may further comprise a memory coupled to the processor, the processor being configured to implement the method described in the first aspect and/or any possible implementation thereof. Optionally, the processor is configured to store instructions, and when the processor executes the instructions stored in the memory, the method described in the above first aspect and/or any possible implementation manner thereof may be implemented. The apparatus may also include a communication interface for the apparatus to communicate with other devices, which may be, for example, a transceiver, circuit, bus, module, pin, or other type of communication interface.

In a seventh aspect, the present application provides an apparatus for transmitting information, the apparatus comprising a processor configured to implement the method described in the second aspect and/or any possible implementation manner thereof. The apparatus may further comprise a memory coupled to the processor for implementing the method described in the second aspect above and/or any possible implementation thereof. Optionally, the processor is configured to store instructions, and when the processor executes the instructions stored in the memory, the method described in the second aspect and/or any possible implementation manner thereof may be implemented. The apparatus may also include a communication interface for the apparatus to communicate with other devices.

In an eighth aspect, the present application provides a system for transmitting data, the system comprising the apparatus provided in the fourth aspect and the apparatus provided in the fifth aspect; or alternatively

The system comprises the apparatus provided by the sixth aspect and the apparatus provided by the seventh aspect;

in a ninth aspect, the present application provides a computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of the first aspect and any possible design thereof.

In a tenth aspect, the present application provides a computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of the second aspect and any possible design thereof.

In an eleventh aspect, the present application provides a computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of the third aspect and any possible design thereof.

In a twelfth aspect, the present application provides a chip comprising a processor. A processor is adapted to perform the method of the first aspect and any possible implementation thereof.

Optionally, the chip further comprises a memory, the memory being coupled to the processor.

Further optionally, the chip further comprises a communication interface.

In a thirteenth aspect, the present application provides a chip comprising a processor. The processor is adapted to perform the method of the second aspect and any possible implementation thereof.

Further optionally, the chip further comprises a communication interface.

In a fourteenth aspect, the present application provides a chip comprising a processor. A processor is adapted to perform the method of the third aspect and any possible implementation thereof.

Further optionally, the chip further comprises a communication interface.

In a fifteenth aspect, the present application provides a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the method of the first aspect and any possible design thereof.

In a sixteenth aspect, the present application provides a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the method of the second aspect and any possible implementation thereof.

In a seventeenth aspect, the present application provides a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the method of the third aspect and any possible implementation thereof.

Drawings

Fig. 1 is a schematic diagram of an application scenario provided in an embodiment of the present application.

Fig. 2 is a schematic diagram of another application scenario provided in an embodiment of the present application.

Fig. 3 is a schematic diagram of another application scenario provided in an embodiment of the present application.

Fig. 4 is a schematic diagram of another application scenario provided in an embodiment of the present application.

Fig. 5 is a schematic diagram of a method for transmitting information according to an embodiment of the present application.

Fig. 6 is a schematic diagram of another method for transmitting information according to an embodiment of the present application.

Fig. 7 is a schematic diagram of another method for transmitting information according to an embodiment of the present application.

Fig. 8 is a schematic diagram of another method for transmitting information according to an embodiment of the present application.

Fig. 9 is a schematic block diagram of an apparatus for transmitting information according to an embodiment of the present disclosure.

Fig. 10 is a schematic block diagram of an apparatus for transmitting information according to an embodiment of the present application.

Fig. 11 is a schematic block diagram of a system for transmitting information according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of another apparatus for transmitting information according to an embodiment of the present disclosure.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, a LTE Frequency Division Duplex (FDD) system, a LTE Time Division Duplex (TDD), a universal mobile telecommunications system (universal mobile telecommunications system, UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a fifth generation (5G) system, or a new radio NR (NR) system, etc.

Fig. 1 is a schematic diagram illustrating an application scenario of an embodiment of the present application. As shown in fig. 1, the apparatus includes at least two devices and at least one terminal device, and at least two devices are described as device 1 and device 2 in fig. 1 as an example, for example, device 1 and device 2 may be base stations; fig. 1 illustrates an example of a terminal device. The at least two devices and the at least one terminal device may communicate via a wireless link. For example, the terminal device may communicate wirelessly with device 1 when the terminal device is within the coverage of device 1 and with device 2 when the terminal device is within the coverage of device 2. When the terminal device moves from the coverage of device 1 to the coverage of device 2, it is necessary to switch the wireless link of the terminal device from device 1 to device 2 to ensure the reliability of data transmission.

Fig. 2 shows another schematic view of a scenario of an embodiment of the present application, where a same network device may include a Centralized Unit (CU) and one or more Distributed Units (DUs), for example, the network device may be a base station, in other words, two DUs are shown in fig. 2, which are a source DU and a target DU, respectively, and when a terminal device moves from a coverage area of the source DU to a coverage area of the target DU, the DU connected to the terminal device needs to be switched from the source DU to the target DU, the switching at this time may be referred to as intra-CU switching, that is, the terminal device may switch between two DUs under one CU.

Fig. 3 is a schematic diagram of another scenario according to an embodiment of the present application, where a source network device may include a source CU and a source DU, and a target network device may include a target CU and a target DU, and when an end device moves from a coverage area of the source DU under the source network device to a coverage area of the target DU under the target network device, a DU connected to the end device needs to be handed over from the source DU of the source network device to the target DU of the target network device.

Fig. 4 shows another schematic view of the present embodiment, where the source network device may include a source CU and a source DU. When the terminal device moves from the coverage of the source DU under the source network device to the coverage of the target network device, the terminal device needs to be switched from the source DU to the target network device.

The CUs and DUs in fig. 2-4 are partitions of the network device from a logical function perspective. CUs and DUs may be physically separate or may be deployed together. Multiple DUs may share one CU. One DU may also connect multiple CUs (not shown). The CU and DU may be connected via an interface, such as an F1 interface. CUs and DUs may be partitioned according to the protocol layers of the wireless network, for example, one possible partitioning is: the CU is configured to perform functions of a Radio Resource Control (RRC) layer, a Service Data Adaptation Protocol (SDAP) layer, and a Packet Data Convergence Protocol (PDCP) layer, and the DU is configured to perform functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, a physical (physical) layer, and the like. It is understood that the division of the CU and DU processing functions by such protocol layers is merely an example and may be divided in other ways. For example, a CU or DU may be partitioned to have more protocol layer functionality. For example, a CU or DU may also be divided into partial processing functions with protocol layers. In one possible implementation, some functions of the RLC layer and functions of the protocol layers above the RLC layer are set in the CU, and the remaining functions of the RLC layer and functions of the protocol layers below the RLC layer are set in the DU. In another possible implementation, the functions of the CUs or DUs may also be divided according to the service type or other system requirements. For example, the function that processing time needs to meet the delay requirement is set in DU, and the function that does not need to meet the delay requirement is set in CU according to the delay division. In yet another possible implementation, a CU may also have one or more functions of the core network. One or more CUs may be centrally located or separately located. For example, the CUs may be located on the network side to facilitate centralized management. The DU may have multiple rf functions, or may have a remote rf function.

The functionality of a CU may be implemented by one entity or by different entities. For example, the functionality of the CU may be further divided, for example, by separating a Control Plane (CP) and a user plane (user plane, UP), i.e., the control plane (CU-CP) and the user plane (CU-UP) of the CU. For example, the CU-CP and CU-UP can be implemented by different functional entities, which can be coupled to the DU to collectively perform the function of the base station.

The functions of the CU and the DU may be set as needed in specific implementations, and this is not limited in this embodiment of the present application.

In the embodiment of the present application, a terminal device communicates with device 1 or device 2 in fig. 1, which may be understood as that the terminal device communicates with a cell under device 1 or device 2; the terminal device communicates with the source DU or the target DU of fig. 2 and 3, which may be understood as that the terminal device communicates with a cell under the source DU or the target DU; the terminal device communicates with the source DU or the target network device in fig. 4, which may be understood as the terminal device communicating with the source DU or the target network device. For example, cell 1 in fig. 1 belongs to a cell under device 1, cell 2 in fig. 1 belongs to a cell under device 2, cell 1 in fig. 2 and 3 belongs to a cell under source DU, cell 2 in fig. 2 and 3 belongs to a cell under target DU, cell 1 in fig. 4 belongs to a cell under source DU, and cell 2 in fig. 4 belongs to a cell under target network device. In fig. 1, the device 1 and the terminal device communicate with each other by using the radio resource provided by the cell 1, and the device 2 and the terminal device communicate with each other by using the radio resource provided by the cell 2. In fig. 2 and 3, the source DU and the terminal device communicate with each other by using the radio resource provided by the cell 1, and the target DU and the terminal device communicate with each other by using the radio resource provided by the cell 2. In fig. 4, the source DU and the terminal device can be understood as communicating with each other through the wireless resource provided by the cell 1, and the target network device and the terminal device can be understood as communicating with each other through the wireless resource provided by the cell 2.

In fig. 1 to 4, as the terminal device gradually moves from the coverage of one cell 1 to the coverage of a cell 2, or for reasons such as the need to adjust the wireless transmission traffic load of the cell 1, in order to ensure the continuity of communication and the quality of service, the system transfers the communication link between the terminal device and the cell 1 to the cell 2, that is, the network device that needs to be served by the terminal device is switched from the device 1 of fig. 1 to the device 2, or from the source DU of fig. 2 and 3 to the target DU, or from the source DU of fig. 4 to the target network device. In the switching process, in order to avoid the terminal device disconnecting from the cell 1 and generating time delay in the process of performing random access with the cell 2, the terminal device can simultaneously maintain the connection with the cell 1 and the cell 2, and when the terminal device is switched from the cell 1 to the cell 2 (namely the terminal device 1 completes the random access process with the cell 2), the terminal device is disconnected from the cell 1 again, so that the continuity of data can be ensured, and the time delay of the data can also be reduced. However, if the cell 1 and the cell 2 are the same-frequency cells, the terminal device transmits data with the cell 1 and the cell 2 on the same frequency, which may cause large interference.

For flexible application frequency, a bandwidth part (BWP) is introduced, and the network device can activate different BWPs to the terminal device under different network device loads and terminal device traffic demands. For example, when the terminal device needs to transmit a large amount of traffic, the network device may activate a wider BWP for the terminal device; when the network device finds that the load of the currently activated BWP of the terminal device is heavy, the network device may activate a more idle BWP for the terminal device.

The BWP may be further divided into an initially activated BWP and a dedicated (decrypted) BWP, where the terminal device enters a data connection state using the initially activated BWP in an idle state, the BWP used by the terminal device in the data connection state is called a dedicated BWP, and the first active BWP in the data connection state is one of the dedicated BWPs except for the first activated BWP. In the present application, during the handover, the terminal device is connected to the first device and the second device at the same time, and thus belongs to the handover in the connected state, i.e. the present application only relates to the dedicated BWP.

The embodiment of the present application provides a method for transmitting information, in which a first device instructs a second device to configure a terminal device with a BWP different from a first BWP configured by the first device for the terminal device by sending first indication information, so that the second device can avoid the first BWP when configuring the second BWP for the terminal device, and thus, when the terminal device simultaneously transmits data with the first device and the second device, interference can be avoided.

Fig. 5 is a method 100 for transmitting data according to an embodiment of the present application, including:

s110, a first device sends first indication information to a second device, and the second device receives the first indication information from the first device, where the first indication information is used to indicate that the second device configures a BWP different from a first bandwidth part (BWP) for a terminal device, where the first BWP is the BWP configured by the first device for the terminal device.

For example, the first device may be device 1 in fig. 1, and the second device may be device 2 in fig. 1; for another example, the first device may be the source DU in fig. 2, the second device may be the CU in fig. 2, and the source DU and the CU in fig. 2 belong to one network device, for example, to one base station, that is, in the scenario of fig. 2, the terminal device needs to switch from the source DU to the target DU, also referred to as intra-CU handover; for another example, the first device may be the source DU in fig. 3, the second device may be the target CU in fig. 3, the source DU and the source CU in fig. 3 belong to a source network device, such as a source base station, and the target DU and the target CU in fig. 3 belong to a target network device, such as a target base station, and in the scenario of fig. 3, the terminal device needs to switch from the source DU to the target DU, which is also referred to as inter-CU switching. As another example, the first device may be the source DU in fig. 4, the second device may be the target network device in fig. 4, the source DU and the source CU in fig. 4 belong to a source network device, such as a source base station, and the target network device in fig. 4 may be a target base station, for example.

In the scenario of fig. 3, S110 includes: the source DU can send first indication information to the target CU through the source CU, and the target CU receives the first indication information sent by the source DU through the source CU; s120, including: and the target CU sends second indication information to the source DU through the source CU, and the source DU receives the second indication information sent by the target CU through the source CU.

In the scenario of fig. 4, S110 includes: the source DU can send first indication information to the target network equipment through the source CU, and the target network equipment receives the first indication information sent by the source DU through the source CU; s120, including: the target network device sends the second indication information to the source DU through the source CU, and the source DU receives the second indication information sent by the source CU from the target network device.

And S120, the second device sends second indication information to the first device according to the first indication information, the first device receives the second indication information from the second device, the second indication information is used to indicate a second BWP allocated to the terminal device by the second device, and the first BWP is different from the second BWP.

The first BWP may be one or more BWPs, and the second BWP may also be one or more BWPs; the first BWP being different from the second BWP may be understood that none of the BWPs in the first BWP is identical to the BWP in the second BWP, in other words, the first BWP does not intersect with the second BWP (i.e. there is no one common BWP).

When the second BWP is a private BWP, the first BWP is discussed in two cases below.

In case 1, the first BWP is the BWP currently activated by the first device for the terminal device to transmit data, that is, the second device needs to configure a second BWP different from the BWP currently activated by the first device for the terminal device to transmit data, in other words, at this time, any one of the second BWPs is different from the BWP currently activated by the first device for the terminal device to transmit data.

When the first device replaces the currently activated BWP for the terminal device to transmit data, it may be that the second BWP configured by the second device is the same as the replaced BWP, which may also result in the terminal device simultaneously transmitting with the first device and the second device, and there is no way to avoid interference, therefore, before the terminal device completes the handover, the first device does not replace the currently activated BWP for the terminal device to transmit data, so as to avoid interference when the terminal device simultaneously transmits data with the first device and the second device, and the completion of the handover of the terminal device may be understood as: after the terminal equipment receives the switching completion message or the terminal equipment is disconnected with the source base station

In case 2, the first BWP is a dedicated BWP configured for the terminal device by the first device, where the dedicated BWP configured for the terminal device by the first device includes a currently activated BWP for the terminal device to transmit data. That is, the first device needs to indicate, through the first indication information, that the second device configures a BWP different from the dedicated BWP configured by the first device for the terminal device, and when the dedicated BWP configured by the first device for the terminal device is different from the dedicated BWP configured by the second device for the terminal device, any one BWP of the dedicated BWPs activated by the first device is different from any one BWP of the dedicated BWPs activated by the second device, so that co-channel interference can be avoided, and in this case, the first device can replace the currently activated BWP used for the terminal device to transmit data.

S130, the first device sends second indication information to the terminal device, and the terminal device is from the second indication information sent by the first device.

Optionally, the first indication information may carry a first identifier of the first BWP, and the second indication information may carry a second identifier of the second BWP, that is, after the first device sends the first indication information to the second device, the second device may determine, according to the first identifier in the first indication information, that any one BWP in the first BWP cannot be configured for the terminal device, but configure the second BWP for the terminal device, and the first device may know, through the second identifier carried by the second indication information, that the second device allocates the second BWP for the terminal device.

The following describes an example of a method for transmitting information provided by an embodiment of the present application with reference to fig. 6 to 8.

Fig. 6 shows a method 200 for transmitting information provided in the embodiment of the present application in the scenario of fig. 1, where a device 1 in the method 200 may be a first device in the method 100, a device 2 may be a second device in the method 100, for example, the device 1 in the method 200 may be a source base station, and a device 3 may be a target base station, and the method 200 includes:

s210, the device 1 sends a first Radio Resource Control (RRC) reconfiguration message to the connected terminal device, where the first RRC reconfiguration message includes one or more of parameters such as a measurement object, a measurement configuration, and a measurement identifier.

S220, after the terminal device measures one or more cells according to the first RRC reconfiguration message, a measurement report is formed, and the measurement report is sent to the device 1, for example, when the signal strength of the current serving cell is lower than the threshold and the signal of the target cell is higher than the threshold, the terminal device reports the event to the device 1 through the measurement report.

S230, after receiving the measurement report from the terminal device, the device 1 determines whether to switch according to the measurement report, for example, whether to switch according to the current network condition or the service speed, and if it is determined to switch, then S240 is executed.

S240, the device 1 sends a handover request message to the device 2, where the handover request message may carry the first indication information in the method 100, and the first indication information is used to indicate the device 2 to configure a BWP different from the first BWP for the terminal device.

S250, the device 2 determines, according to the network status of itself or the number of connected terminal devices, that the terminal device is not required to be allowed to access, and if the terminal device is allowed to access, the device 2 sends a handover confirmation message to the device 1, where the handover confirmation message includes the second indication information, and of course, the handover confirmation message may also include parameters, such as a new cell-radio network temporary identifier (C-RNTI) allocated by the device 2 to the terminal device, and a security related algorithm of the device 2.

S260, after receiving the handover confirmation message sent by the device, the device 1 sends a second RRC reconfiguration message (also referred to as a handover command) to the terminal device, where the second RRC reconfiguration message includes second indication information in S250, where the second indication information is used to indicate a second BWP configured for the terminal device by the second device, the second BWP is a dedicated BWP configured for the terminal device by the device 2, and the dedicated BWP includes a first activated BWP configured for the terminal device by the device 2. Of course, the second RRC reconfiguration message may further include the C-RNTI in S550, a security-related algorithm of the device 2, and other parameters.

S270, the terminal device initiates random access to the device 2 on the BWP activated for the first time configured for the terminal device by the device 2, at this time, the terminal device still maintains connection with the device 1, and after the terminal device successfully accesses the device 2, the terminal device disconnects from the device 1.

S280, the terminal device sends an RRC reconfiguration complete message to the device 2.

Since the terminal device can be connected to the device 1 and the device 2 at the same time, after S280, it indicates that the terminal device successfully accesses the cell under the coverage of the device 2, at this time, the terminal device may still be connected to the device 1, and after the terminal device is disconnected from the device 1, the handover may be considered to be completed.

Fig. 7 illustrates a method 300 for transmitting information according to the embodiment of the present application in the scenario of fig. 2, where a source DU in the method 300 may be a first device in the method 100, a CU may be a second device in the method 100, and the source DU, a target DU, and the CU in the method 300 all belong to the same network device, and the method 300 includes:

s301, the terminal device measures one or more cells to form a measurement report, and sends the measurement report to the source DU.

S302, the source DU forwards an uplink RRC message to the CU, where the uplink RRC message includes the measurement report in S301 and first indication information in the method 100, where the first indication information may instruct the CU to allocate a BWP, which is different from a first BWP, to the terminal device, and the first BWP may be a BWP currently activated by the source DU and used for the terminal device to transmit data.

S303, after receiving the uplink RRC message sent by the source DU, the CU determines whether a handover is needed according to the measurement report, and when a handover is needed, the CU configures a second BWP different from the first BWP for the terminal device, and sends a context setup request message to the target DU, where the context setup request message may include second indication information, that is, after receiving the context setup request message, the target DU may know that the CU configures the second BWP for the terminal device, and only activates the BWP in the second BWP in the process of communicating with the terminal device.

S304, after receiving the context establishment request message, the target DU sends a context establishment response message to the CU.

S305, the CU sends a context modification request message to the source DU, and the context modification request message is used for requesting the source DU to modify the context of the terminal equipment. The context modification request message includes an RRC reconfiguration message, which includes the second indication information, and of course, the RRC reconfiguration message may also include a new C-RNTI allocated by the CU for the terminal device, a parameter related to security algorithm of the CU, and the like.

The sequence of S303 and S305 is not limited in the embodiment of the present application, and S303 may be performed after or after S305, or simultaneously.

S306, the source DU sends a context modification response message to the CU, and the context modification response message is used for indicating that the source DU modifies the context of the terminal equipment.

S307, the source DU sends an RRC reconfiguration message to the terminal device, where the RRC reconfiguration message carries second indication information, so that the terminal device may determine, according to the second indication information, a second BWP allocated to the terminal device by the CU, where the second BWP includes a dedicated BWP configured by the CU for the terminal device, and the dedicated BWP includes a first activated BWP configured by the CU for the terminal device.

The order of S306 and S307 is not limited at all, and S306 may be performed before or after S307 or simultaneously.

S308, the terminal device initiates a random access procedure to the target DU on the first activated BWP in the dedicated BWP indicated by the second indication information.

S309, the terminal device sends RRC reconfiguration complete message to the target DU.

S310, the target DU forwards an uplink RRC message to the CU, wherein the uplink RRC message comprises the RRC reconfiguration complete message of S309.

S311, the CU sends a context release command to the source DU.

S312, after the source DU releases the context of the terminal device, the source DU sends a context release completion message to the CU.

In fig. 7, before the handover, the transmission path of the downlink data is CU-source DU-terminal device, and the transmission path of the uplink data is terminal device-source DU-CU; after the handover, the transmission path of the downlink data is CU-target DU-terminal equipment, and the transmission path of the uplink data is terminal equipment-target DU-CU.

Fig. 8 shows a method 400 for transmitting information provided by the embodiment of the present application in the scenario of fig. 4, where a source DU in the method 400 may be a first device in the method 100, a target network device may be a second device in the method 100, and the source DU and the source CU in the method 400 belong to the source network device, and the method 400 includes:

s401, the terminal device measures one or more cells to form a measurement report, and sends the measurement report to the source DU.

S402, the source DU forwards an uplink RRC message to the source CU, where the uplink RRC message includes the measurement report in S401 and first indication information in the method 100, where the first indication information may indicate that the target network device allocates a different BWP for the terminal device, and the first BWP may be a currently activated BWP for the terminal device to transmit data.

S403, after receiving the measurement report from the terminal device, the source CU determines whether to switch according to the measurement report, for example, determines whether to switch according to the current network condition or the service speed, and if it determines to switch, executes S404.

S404, the source CU sends a switching request message to the target network equipment, wherein the switching request message can carry first indication information.

S405, the target network device determines not to allow the terminal device to access according to the network status of the target network device or the number of connected terminal devices, and if the terminal device is allowed to access, the target network device sends a handover confirmation message to the source CU, and the source CU receives the handover confirmation message sent by the target network device, where the handover confirmation message includes the second indication information, and of course, the handover confirmation message may also include parameters, such as a new C-RNTI allocated by the target network device to the terminal device, and a security-related algorithm of the target CU.

S406, after S405, the source CU sends an RRC reconfiguration message to the source DU, the RRC reconfiguration message including the second indication information.

S407, the source DU sends an RRC reconfiguration message to the terminal device.

S408, the terminal device initiates a random access procedure to the target network device on the first activated BWP in the dedicated BWPs indicated by the second indication information.

S409, the terminal equipment sends RRC reconfiguration complete information to the target network equipment.

If the target network device in fig. 4 and fig. 8 is a scenario in which the CU-DU architecture is separated, that is, when the target network device includes the target DU and the target CU as shown in fig. 3, the interaction flow between the target DU and the target CU refers to the description in the protocol, and for avoiding repeated description, the embodiments of the present application are not described in detail by way of example.

The method for transmitting information provided by the embodiment of the present application is described in detail above with reference to fig. 1 to 8, and the apparatus and system for transmitting information provided by the embodiment of the present application are described in detail below with reference to fig. 9 to 12.

Fig. 9 shows a schematic block diagram of an apparatus 500 for transmitting information according to an embodiment of the present application, where the apparatus 500 may correspond to the first device described in the foregoing method, and may also correspond to a chip or a component of the first device, and each module or unit in the apparatus 500 may be respectively configured to execute each action or process performed by the first device in the foregoing method, and as shown in fig. 9, the apparatus 500 for transmitting data may include a sending unit 510 and a receiving unit 520.

A sending unit 510, configured to send first indication information to a second device, where the first indication information is used to indicate that the second device configures a BWP, which is different from a first bandwidth part BWP, for a terminal device, and the first BWP is a BWP configured for the terminal device by the apparatus;

a receiving unit 520, configured to receive second indication information from the second device, where the second indication information is used to indicate that the second device is a second BWP configured for the terminal device, and the first BWP is different from the second BWP;

the sending unit 510 is further configured to send the second indication information to the terminal device.

As an optional embodiment, the first BWP is a currently activated BWP for the terminal device to transmit data, and the currently activated BWP for the terminal device is not replaced by the apparatus any longer until the terminal device is completely switched.

As an optional embodiment, the second BWP is a dedicated BWP configured by the second device for the terminal device, where the dedicated BWP includes a first activated BWP configured by the second device for the terminal device.

As an alternative embodiment, the apparatus is a source distribution unit DU, the second device is a central unit CU, and the source DU and the CU belong to the same network device.

As an alternative embodiment, the apparatus is a source DU, and the second device is a target CU;

the sending unit 510 is specifically configured to send the first indication information to the target CU through a source CU, where the source DU and the source CU belong to a source network device;

the receiving unit 520 is specifically configured to receive, by the source CU, the second indication information sent by the target CU, where the target CU belongs to the target network device.

As an alternative embodiment, the first BWP is a dedicated BWP configured for the terminal device by the apparatus.

It should be understood that for the specific processes of the units in the apparatus 500 to execute the corresponding steps described above, reference is made to the description of the method embodiment in conjunction with fig. 4 to 8, and for brevity, no further description is provided here.

Fig. 10 shows a schematic block diagram of an apparatus 600 for transmitting information according to an embodiment of the present application, where the apparatus 600 may correspond to the second device described in the foregoing method, and may also correspond to a chip or a component of the second device, and each module or unit in the apparatus 600 may be respectively configured to execute each action or process performed by the second device in the foregoing method, and as shown in fig. 10, the apparatus 600 for transmitting data may include a receiving unit 610 and a sending unit 620.

A receiving unit 610, configured to receive first indication information from a first device, where the first indication information is used to indicate that the apparatus configures a BWP different from a first BWP for a terminal device, and the first BWP is a BWP configured for the terminal device by the first device;

a sending unit 620, configured to send second indication information to the first device according to the first indication information, where the second indication information is used to indicate a second BWP configured for the terminal device by the apparatus, and the first BWP is different from the second BWP.

As an optional embodiment, the first BWP is a currently activated BWP for the terminal device to transmit data, and the currently activated BWP for the terminal device is not replaced by the first device until the terminal device is completely switched.

As an optional embodiment, the second BWP is a dedicated BWP configured for the terminal device by the apparatus, where the dedicated BWP includes a first active BWP configured for the terminal device by the apparatus.

As an alternative embodiment, the first device is a source distribution unit DU, the apparatus is a central unit CU, and the source DU and the CU both belong to a network device.

As an alternative embodiment, the first device is a source DU, and the apparatus is a target CU; the sending unit 620 is specifically configured to send the second indication information to the source DU through a source CU, where the source DU and the source CU belong to a source network device, and the target CU belongs to a target network device.

As an alternative embodiment, the first BWP is a dedicated BWP configured by the first device for the terminal device.

It should be understood that for the specific processes of the units in the apparatus 600 to execute the corresponding steps described above, reference is made to the description of the method embodiment in conjunction with fig. 4 to 8, and for brevity, no further description is provided here.

Fig. 11 shows a system 700 for transmitting information, which includes an apparatus 500 and an apparatus 600 according to an embodiment of the present application.

The apparatus 500 of each of the above aspects has a function of implementing the corresponding steps performed by the first device in the above method, and the apparatus 600 of each of the above aspects has a function of implementing the corresponding steps performed by the second device in the above method; the functions can be realized by hardware or software, and the corresponding software can be executed by hardware. The hardware or software comprises one or more modules corresponding to the functions; for example, the sending unit may be replaced by a communication interface, the receiving unit may be replaced by a communication interface, and other units, such as the determining unit, may be replaced by a processor, to perform the transceiving operation and the related processing operation in each method embodiment, respectively. In an embodiment of the present application, a communication interface of an apparatus is used for the apparatus to communicate with other devices. For example, the communication interface may be a transmitter, a receiver, a transceiver, a circuit, a bus, a module, a pin, or other types of communication interfaces, and the embodiments of the present application are not limited thereto.

In particular implementations, the processor may be configured to perform, for example and without limitation, baseband-related processing, and the communication interface may be configured to perform, for example and without limitation, information exchange. The above devices may be respectively disposed on separate chips, or at least a part or all of the devices may be disposed on the same chip. For example, the processor may be further divided into an analog baseband processor and a digital baseband processor, wherein the analog baseband processor may be integrated with the communication interface on the same chip, and the digital baseband processor may be disposed on a separate chip. With the development of integrated circuit technology, more and more devices can be integrated on the same chip, for example, a digital baseband processor can be integrated on the same chip with various application processors (such as, but not limited to, a graphics processor, a multimedia processor, etc.). Such a chip may be referred to as a System On Chip (SOC). Whether each device is separately located on a different chip or integrated on one or more chips often depends on the specific needs of the product design. The embodiment of the present application does not limit the specific implementation form of the above device.

It is understood that, for the processors referred to in the foregoing embodiments, the functions referred to in any design of the foregoing embodiments of the present application can be implemented by executing program instructions through a hardware platform having the processors and a communication interface, respectively, based on which, as shown in fig. 12, the present application provides a schematic block diagram of an apparatus 800 for transmitting information, the apparatus 800 comprising: a processor 810, a communication interface 820, and a memory 830. Wherein the processor 810, the communication interface 820 and the memory 830 are coupled to communicate with each other, the memory 730 is configured to store instructions, and the processor 810 is configured to execute the instructions stored by the memory 830 to control the communication interface 820 to transmit signals and/or receive signals. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules.

In a possible implementation manner, if the apparatus 800 is a first device, the communication interface 820 is configured to send first indication information to a second device, where the first indication information is used to indicate that the second device configures a BWP different from a first bandwidth portion BWP for a terminal device, and the first BWP is the BWP configured by the apparatus for the terminal device; the communication interface 820 is further configured to receive second indication information from the second device, where the second indication information indicates a second BWP configured by the second device for the terminal device, and the first BWP is different from the second BWP; the communication interface 820 is further configured to send the second indication information to the terminal device.

In a possible implementation manner, if the apparatus 800 is a second device, the communication interface 820 is configured to receive first indication information from a first device, where the first indication information is used to indicate that the apparatus configures a BWP different from a first BWP for a terminal device, and the first BWP is a BWP configured by the first device for the terminal device; the communication interface 820 is further configured to send second indication information to the first device according to the first indication information, where the second indication information indicates a second BWP configured by the apparatus for the terminal device, and the first BWP is different from the second BWP.

It should be understood that the apparatus in fig. 9 or the apparatus in fig. 10 in this embodiment of the present application may be implemented by the apparatus 800 in fig. 12, and may be configured to perform each step and/or flow corresponding to the first device and the second device in the above-described method embodiments.

It should be understood that the various design-related methods, procedures, operations, or steps described in the embodiments of this application can be implemented in a one-to-one correspondence manner through computer software, electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on specific applications and design constraints of the technical solution, for example, aspects such as software and hardware decoupling with good generality and low cost are considered, and the functions can be implemented by adopting a mode of executing program instructions, or aspects such as system performance and reliability are considered, and special circuits are adopted to implement the functions. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

According to the method provided by the embodiment of the present application, the present application further provides a computer program product, which includes: computer program code which, when run on a computer, causes the computer to perform the method in the above embodiments. The various embodiments in this application may also be combined with each other.

According to the method provided by the embodiment of the present application, the present application also provides a computer readable medium, the computer readable medium stores program code, and when the program code runs on a computer, the computer is caused to execute the method in the above embodiment.

In the embodiment of the present application, it should be noted that the above method embodiments of the present application may be applied to a processor, or may be implemented by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or any conventional processor or the like.

It will be appreciated that the memory in the embodiments of the present application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. There are many different types of RAM, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The terms "first," "second," and the like, as used herein, are used solely to distinguish one from another, and "first," "second," and the like, do not by themselves limit the actual order or function of the objects modified thereby. Any embodiment or design described herein as "exemplary," e.g., "optionally" or "in certain implementations" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of these words is intended to present relevant concepts in a concrete fashion.

Various objects such as various messages/information/devices/network elements/systems/devices/operations/etc. may be named in the present application, it is to be understood that these specific names do not constitute limitations on related objects, and the named names may vary according to factors such as scenes, contexts, or usage habits, and the understanding of the technical meaning of the technical terms in the present application should be mainly determined by the functions and technical effects embodied/performed in the technical solutions.

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product may include one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions described in accordance with the embodiments of the present application are generated in whole or in part. The computer may be a general purpose computer, special purpose computer, computer network, network appliance, terminal device, or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that is integrated to include one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic disk), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. In the embodiments of the present application, the embodiments may refer to each other, for example, methods and/or terms between the embodiments of the method may refer to each other, for example, functions and/or terms between the embodiments of the apparatus and the embodiments of the method may refer to each other, without logical contradiction.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and in actual implementation, there may be other divisions, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for transmitting information, wherein a terminal device communicates with a first cell under a first device, and the terminal device communicates with a second cell under a second device, wherein the first cell and the second cell are co-frequency cells, comprising:

a first device sends first indication information to a second device, wherein the first indication information is used for indicating the second device to configure a terminal device with a BWP different from a first bandwidth part BWP, and the first BWP is the BWP configured by the first device for the terminal device;

the first device receives second indication information from the second device, where the second indication information is used to indicate a second BWP configured for the terminal device by the second device, and the first BWP is different from the second BWP;

and the first equipment sends the second indication information to the terminal equipment.

2. The method according to claim 1, wherein the first BWP is the currently activated BWP for the terminal device to transmit data, and wherein the currently activated BWP for the terminal device is not replaced by the first device until the terminal device handover is completed.

3. The method according to claim 1 or 2, wherein the second BWP is a dedicated BWP configured for the terminal device by the second device, and wherein the dedicated BWP comprises a first activated BWP configured for the terminal device by the second device.

4. A method according to any of claims 1-3, characterized in that said first device is a source distribution unit, DU, and said second device is a concentration unit, CU, said source DU and said CU belonging to one network device.

5. The method according to any of claims 1 to 3, wherein the first device is a source DU and the second device is a target CU;

the first device receives second indication information from a second device, and the second indication information comprises:

and the source DU receives the second indication information sent by the target CU through the source CU, wherein the target CU belongs to the target network equipment.

6. The method according to claim 1 or 3, wherein the first BWP is a dedicated BWP configured for the terminal device by the first device.

7. A method for transmitting information, characterized in that a terminal device communicates with a first cell under a first device, and the terminal device communicates with a second cell under a second device at the same time, wherein the first cell and the second cell are co-frequency cells, comprising:

the method comprises the steps that a second device receives first indication information from a first device, wherein the first indication information is used for indicating the second device to configure a BWP (BWP) different from a first BWP (BWP) for a terminal device, and the first BWP is the BWP configured for the terminal device by the first device;

8. The method according to claim 7, wherein the first BWP is a currently activated BWP for the terminal device to transmit data, and the first device does not replace the currently activated BWP for the terminal device to transmit data until the terminal device is completely handed over.

9. The method according to claim 7 or 8, wherein the second BWP is a dedicated BWP configured for the terminal device by the second device, and wherein the dedicated BWP comprises a first activated BWP configured for the terminal device by the second device.

10. The method according to any of claims 7 to 9, wherein said first device is a source DU and said second device is a central unit CU, said source DU and said CU both belonging to one network device.

11. The method according to any of claims 7 to 9, wherein the first device is a source distribution unit, DU, and the second device is a target CU;

wherein, the second device sends second indication information to the first device according to the first indication information, including:

12. The method according to claim 7 or 9, wherein the first BWP is a dedicated BWP configured by the first device for the terminal device.

13. A method for transmitting information, characterized in that a terminal device communicates with a first cell under a first device, and the terminal device communicates with a second cell under a second device at the same time, wherein the first cell and the second cell are co-frequency cells, comprising:

the second device sends second indication information to the first device according to the first indication information, where the second indication information is used to indicate a second BWP configured for the terminal device by the second device, and the first BWP is different from the second BWP;

14. The method according to claim 13, wherein the first BWP is the currently activated BWP for the terminal device to transmit data, and wherein the currently activated BWP for the terminal device is not replaced by the first device until the terminal device handover is completed.

15. The method according to claim 13 or 14, wherein the second BWP is a dedicated BWP configured for the terminal device by the second device, and wherein the dedicated BWP comprises a first activated BWP configured for the terminal device by the second device.

16. The method according to any of the claims 13 to 15, wherein said first device is a source distribution unit, DU, and said second device is a central unit, CU, and wherein said source DU and said CU belong to one network device.

17. The method according to any of claims 13 to 15, wherein the first device is a source DU and the second device is a target CU;

18. The method according to claim 13 or 15, wherein the first BWP is a dedicated BWP configured by the first device for the terminal device.

19. An apparatus for transmitting information, the apparatus being a first device, wherein a terminal device communicates with a first cell under the first device, and the terminal device communicates with a second cell under a second device at the same time, wherein the first cell and the second cell are co-frequency cells, comprising:

a sending unit, configured to send first indication information to a second device, where the first indication information is used to indicate that the second device configures a BWP, which is different from a first bandwidth part BWP, for a terminal device, and the first BWP is a BWP configured for the terminal device by the apparatus;

a receiving unit, configured to receive second indication information from the second device, where the second indication information is used to indicate a second BWP configured for the terminal device by the second device, and the first BWP is different from the second BWP;

the sending unit is further configured to send the second indication information to the terminal device.

20. The apparatus according to claim 19, wherein the first BWP is a currently activated BWP for the terminal device to transmit data, and wherein the currently activated BWP for the terminal device is not replaced by the apparatus until the terminal device switch is completed.

21. The apparatus according to claim 19 or 20, wherein the second BWP is a dedicated BWP configured for the terminal device by the second device, and wherein the dedicated BWP comprises a first activated BWP configured for the terminal device by the second device.

22. The apparatus according to any of the claims 19 to 21, wherein said apparatus is a source distribution unit, DU, and said second device is a concentration unit, CU, and wherein said source DU and said CU belong to one network device.

23. The apparatus according to any of claims 19 to 21, wherein the apparatus is a source DU, and the second device is a target CU;

the sending unit is specifically configured to send the first indication information to the target CU through a source CU, where the source DU and the source CU belong to a source network device;

the receiving unit is specifically configured to receive, by a source CU, the second indication information sent by the target CU, where the target CU belongs to a target network device.

24. The apparatus according to claim 19 or 21, wherein the first BWP is a dedicated BWP configured for the terminal device by the apparatus.

25. An apparatus for transmitting information, the apparatus being a second device, wherein a terminal device communicates with a first cell under the first device, and the terminal device communicates with a second cell under the second device at the same time, wherein the first cell and the second cell are co-frequency cells, comprising:

a receiving unit, configured to receive first indication information from a first device, where the first indication information is used to indicate that the apparatus configures a BWP different from a first BWP for a terminal device, and the first BWP is a BWP configured for the terminal device by the first device;

a sending unit, configured to send second indication information to the first device according to the first indication information, where the second indication information is used to indicate a second BWP configured for the terminal device by the apparatus, and the first BWP is different from the second BWP.

26. The apparatus of claim 25, wherein the first BWP is a currently activated BWP for the terminal device to transmit data, and wherein the currently activated BWP for the terminal device is not replaced by the first device until the terminal device switch is complete.

27. The apparatus according to claim 25 or 26, wherein the second BWP is a dedicated BWP configured by the apparatus for the terminal device, the dedicated BWP comprising a first active BWP configured by the apparatus for the terminal device.

28. The arrangement according to any of the claims 25-27, wherein said first device is a source distribution unit, DU, and said arrangement is a central unit, CU, and wherein said source DU and said CU belong to one network device.

29. The apparatus according to any of claims 25-27, wherein the first device is a source DU, and the apparatus is a target CU;

the sending unit is specifically configured to send the second indication information to the source DU through a source CU, where the source DU and the source CU belong to a source network device, and the target CU belongs to a target network device.

30. The apparatus according to claim 25 or 27, wherein the first BWP is a dedicated BWP configured for the terminal device by the first device.

31. A system for transmitting information is characterized in that a terminal device communicates with a first cell under a first device, the terminal device communicates with a second cell under a second device at the same time, wherein the first cell and the second cell are co-frequency cells,

the system comprises a first device and a second device, wherein the first device is used for sending first indication information to the second device, the first indication information is used for indicating the second device to configure a terminal device with a BWP different from a first bandwidth part BWP, and the first BWP is the BWP configured by the first device for the terminal device;

the second device is configured to receive first indication information sent by the first device, and send second indication information to the first device according to the first indication information, where the second indication information is used to indicate a second BWP configured for the terminal device by the second device, and the first BWP is different from the second BWP;

the first device is further configured to send the second indication information to the terminal device.

32. The system according to claim 31, wherein the first BWP is a currently activated BWP for the terminal device to transmit data, and wherein the currently activated BWP for the terminal device is not replaced by the first device until the terminal device handover is completed.

33. The system according to claim 31 or 32, wherein the second BWP is a dedicated BWP configured by the second device for the terminal device, the dedicated BWP comprising a first activated BWP configured by the second device for the terminal device.

34. The system according to any of the claims 31 to 33, wherein said first device is a source distribution unit, DU, and said second device is a central unit, CU, said source DU and said CU belonging to one network device.

35. The system according to any of the claims 31 to 33, wherein said first device is a source DU and said second device is a target CU;

the source DU is used for sending the first indication information to the target CU through a source CU, and the source DU and the source CU belong to source network equipment;

the target CU is configured to send the second indication information to the source DU through a source CU, and the target CU belongs to a target network device.

36. The system according to claim 31 or 33, wherein the first BWP is a dedicated BWP configured by the first device for the terminal device.