Method for communicating on a bandwidth portion

Abstract

An embodiment of the present application provides a method for communicating on a bandwidth part BWP (pair) to reduce data congestion and improve the success rate of data transmission. The method includes: a terminal device switches from a first BWP (pair) to a second BWP (pair) of the terminal device. The first BWP (pair) is used for multiple terminal devices in the cell where the terminal device is located to receive paging messages from a network device. When the terminal device is on the first BWP (pair), it is in the radio resource control_idle state or the radio resource control_inactive state; the terminal device accesses the network device or performs specific data transmission of the terminal device with the network device on the second BWP (pair).

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a method for communicating on a bandwidth part. Background Art

[0002] With the development of communication technologies and the improvement of user requirements, terminal devices in communication scenarios gradually exhibit characteristics such as a large number and multiple forms. For example, in industrial automation scenarios, there are a large number of monitoring devices, machines, sensors, etc. in a factory building; in home and life scenarios, there are a large number of mobile phones, tablets, wearable devices, smart home appliances, or in-vehicle terminal devices, etc. Summary of the Invention

[0003] Embodiments of this application provide a method for communicating on a bandwidth part (pair) to reduce data congestion of a terminal device and improve the success rate of data transmission.

[0004] In a first aspect, a method for communicating on a bandwidth part pair BWP is provided, including: switching from a first BWP pair to a second BWP pair of a terminal device, where a downlink BWP of the first BWP pair is used for a plurality of terminal devices in a cell where the terminal device is located to receive paging messages from a network device, and among the plurality of terminal devices, there is the terminal device, and when on the first BWP pair, a radio resource control (RRC) state of the terminal device is a radio resource control - idle (RRC_IDLE) state or a radio resource control - inactive (RRC_INACTIVE) state; accessing the network device on the second BWP pair. The first BWP pair is a common BWP pair.

[0005] When the method of the first aspect is applied to a BWP-based design, it can be described as: providing a method for communicating on a BWP, including: switching from a first BWP to a second BWP of a terminal device, where the first BWP is used for a plurality of terminal devices in a cell where the terminal device is located to receive paging messages from a network device, and among the plurality of terminal devices, there is the terminal device, and when on the first BWP, a radio resource control (RRC) state of the terminal device is a radio resource control - idle (RRC_IDLE) state or a radio resource control - inactive (RRC_INACTIVE) state; accessing the network device on the second BWP. The first BWP is a common BWP. The first BWP being used for a plurality of terminal devices in a cell where the terminal device is located to receive paging messages from a network device includes: downlink resources in the first BWP being used for a plurality of terminal devices in a cell where the terminal device is located to receive paging messages from a network device. Accessing the network device on the second BWP includes: sending a PRACH or a preamble on an uplink resource in the second BWP to the network device.

[0006] In this method, when the terminal device is in the RRC_IDLE state or the RRC_INACTIVE state, it camps on the common first BWP (pair) to listen for paging messages. When the terminal device needs to access the network device, for example, when receiving a paging message for the terminal device or triggered by the upper layer of the terminal device, it switches from the common first BWP (pair) to the second BWP (pair) specific to the terminal device to access the network device on the second BWP (pair). Through this method, multiple terminal devices can be dispersed to access the network device on their respective specific second BWP (pairs), avoiding access congestion and improving the access success rate.

[0007] In a possible design, the method further includes: performing RRC establishment with the network device on the second BWP pair, and the RRC state of the terminal device is converted from the RRC_IDLE state or the RRC_INACTIVE state to the Radio Resource Control - Connected RRC-CONNECTED state.

[0008] Through this method, after accessing the network device on the second BWP pair, the terminal device can establish an RRC connection with the network device, thereby being able to transmit data specific to the terminal device.

[0009] In a possible design, if the RRC state of the terminal device is the RRC_INACTIVE state, the method further includes: performing RRC resume with the network device on the second BWP pair, and the RRC state of the terminal device is converted from the RRC_INACTIVE state to the Radio Resource Control - Connected RRC-CONNECTED state.

[0010] Through this method, after accessing the network device on the second BWP pair, the terminal device can perform RRC resume with the network device to resume the RRC connection with the network device, thereby being able to transmit data specific to the terminal device.

[0011] In a possible design, the switching from the first BWP pair to the second BWP pair includes: after receiving the paging message of the terminal device on the downlink BWP of the first BWP pair, or after being triggered by the upper layer of the terminal device, switching from the first BWP pair to the second BWP pair.

[0012] In a possible design, the configuration of the second BWP pair is predefined.

[0013] Through this method, the signaling overhead for configuring the second BWP pair can be saved.

[0014] In a possible design, the method further includes: receiving the configuration of the second BWP pair from the network device.

[0015] Through this method, the second BWP pair can be configured according to the channel conditions of the terminal device, so that the channel quality is good when transmitting the data of the terminal device on the second BWP pair, and the data transmission success rate is high.

[0016] In a possible design, the configuration of the second BWP pair is indicated by a Radio Resource Control - Release (RRC - release) message, a paging message, a broadcast channel, or a system message.

[0017] Through this method, the terminal device can timely obtain the configuration information of the second BWP pair. When using a paging message, a broadcast channel, or a system message to indicate the configuration information of the second BWP pair, the configuration of the second BWP pair can also be updated according to the channel conditions or system load, so as to improve the data transmission success rate or reduce the data transmission delay.

[0018] In a possible design, the configuration of the second BWP pair is used to indicate that the Physical Downlink Control Channel (PDCCH) and / or Physical Downlink Shared Channel (PDSCH) transmitted on the downlink BWP of the second BWP pair are Quasi - Co - Located (QCL) channels. Among them, the QCL channels of the PDCCH and PDSCH can be the same or different, and the embodiments of the present application do not make restrictions. For example, the configuration of the second BWP pair is used to indicate that the PDCCH transmitted on the downlink BWP of the second BWP pair and the Synchronization Signal Block (SSB) transmitted on the downlink BWP of the first BWP pair are QCL; and / or, the configuration of the second BWP pair is used to indicate that the PDSCH transmitted on the downlink BWP of the second BWP pair and the SSB transmitted on the downlink BWP of the first BWP pair are QCL.

[0019] Through the method, the terminal device can use the SSB to obtain channel estimation, and use the channel estimation result to demodulate the PDCCH and / or PDSCH, so that the terminal device does not need to perform additional channel estimation for the PDCCH or PDSCH, reducing the implementation complexity and saving the power consumption of the terminal device.

[0020] In a possible design, the method further includes: determining the second BWP pair according to the identifier of the terminal device. Exemplarily, according to the identifier of the terminal device, the second BWP pair is determined from a set of candidate second BWP pairs. Through this method, the signaling overhead for configuring the second BWP pair can be saved.

[0021] Similar to the above design, the configuration of the second BWP pair in the candidate second BWP pair set is predefined; or, it is indicated by a Radio Resource Control - Release (RRC - release) message, a paging message, a broadcast channel, or a system message. Optionally, the configuration of the second BWP pair is used to indicate that the Physical Downlink Control Channel (PDCCH) and / or the Physical Downlink Shared Channel (PDSCH) transmitted on the downlink BWP of the second BWP pair are channels that are Quasi - Co - Located (QCL).

[0022] In a second aspect, a method for communicating on a Bandwidth Part (BWP) pair is provided, including: switching from a first BWP pair to a second BWP pair of a terminal device, where the downlink BWP of the first BWP pair is used for multiple terminal devices in the cell where the terminal device is located to receive paging messages from a network device, and among the multiple terminal devices, there is the terminal device, and when on the first BWP pair, the Radio Resource Control (RRC) state of the terminal device is the Radio Resource Control - Inactive (RRC_INACTIVE) state; transmitting specific information of the terminal device with the network device on the second BWP pair, where when on the second BWP pair, the RRC state of the terminal device is the RRC_INACTIVE state. The first BWP pair is a common BWP pair. Optionally, the method further includes: after transmitting the specific information of the terminal device with the network device on the second BWP pair, switching from the second BWP pair to the first BWP pair. After switching from the second BWP pair to the first BWP pair, re - camping on the first BWP pair, it is possible to listen for paging messages from the network device on the downlink BWP of the first BWP pair, and it is also possible to receive synchronization signals, the Physical Broadcast Channel, and system messages, etc. on this downlink BWP.

[0023] When the method of the second aspect is applied to the BWP-based design, it can be described as follows: A method for communicating on a bandwidth part BWP is provided, including: switching from a first BWP to a second BWP of a terminal device, where the first BWP is used for multiple terminal devices in the cell where the terminal device is located to receive paging messages from a network device. Among them, the multiple terminal devices include the terminal device, and when on the first BWP, the radio resource control (RRC) state of the terminal device is the radio resource control _ inactive state (RRC_INACTIVE state); transmitting specific information of the terminal device with the network device on the second BWP, where when on the second BWP, the RRC state of the terminal device is the RRC_INACTIVE state. The first BWP is a common BWP. Optionally, the method further includes: after transmitting the specific information of the terminal device with the network device on the second BWP, switching from the second BWP to the first BWP. After switching from the second BWP to the first BWP, re-residing on the first BWP, it is possible to listen for paging messages from the network device on the downlink resources of the first BWP, and it is also possible to receive synchronization signals, physical broadcast channels, and / or system messages, etc. on these downlink resources. Transmitting the specific information of the terminal device with the network device on the second BWP includes: transmitting specific uplink information of the terminal device with the network device on the uplink resources of the second BWP; and / or, transmitting specific downlink information of the terminal device with the network device on the downlink resources of the second BWP.

[0024] In this method, when the terminal device is in the RRC_INACTIVE state, it resides on the common first BWP (pair) to listen for paging messages. When the terminal device needs to perform data transmission with the network device, for example, when receiving a paging message for this terminal device or triggered by the upper layer of the terminal device, it switches from the common first BWP (pair) to the second BWP (pair) specific to this terminal device, and performs data transmission with the network device on the second BWP (pair). Optionally, at any time, the terminal device can switch back to the first BWP (pair) to reside. Through this method, multiple terminal devices can be dispersed to perform data transmission with the network device on their respective specific second BWP (pairs), avoiding access congestion, improving the success rate of data transmission, or enabling data to be transmitted in a timely manner to reduce latency.

[0025] The switching from the first BWP pair to the second BWP and the configuration of the second BWP pair, etc., can refer to the corresponding content in the first aspect and will not be elaborated here.

[0026] In a third aspect, a method for communication on a bandwidth part (BWP) pair is provided, including: sending one or more of a broadcast message, a paging message, and system information to a plurality of terminal devices in the cell where the terminal device is located on a first BWP pair, where the plurality of terminal devices includes the terminal device, and the radio resource control (RRC) state of the terminal device is in the radio resource control - idle (RRC_IDLE) state or the radio resource control - inactive (RRC_INACTIVE) state when on the first BWP pair; performing a random access procedure with the terminal device on a second BWP pair of the terminal device. The first BWP pair is a common BWP pair.

[0027] The configuration of the second BWP pair can refer to the corresponding content in the first aspect and will not be elaborated here.

[0028] In a fourth aspect, a method for communication on a bandwidth part (BWP) pair is provided, characterized by including: sending one or more of a broadcast message, a paging message, and system information to a plurality of terminal devices in the cell where the terminal device is located on a first BWP pair, where the plurality of terminal devices includes the terminal device, and the radio resource control (RRC) state of the terminal device is in the radio resource control - inactive (RRC_INACTIVE) state when on the first BWP pair; transmitting specific information of the terminal device with the terminal device on a second BWP pair of the terminal device, where the RRC state of the terminal device is in the RRC_INACTIVE state when on the second BWP pair. The first BWP pair is a common BWP pair.

[0029] The configuration of the second BWP pair can refer to the corresponding content in the first aspect and will not be elaborated here.

[0030] In a fifth aspect, a device is provided. The device can be a terminal device, a device in a terminal device, or a device that can be used in matching with a terminal device. In one design, the device can include modules corresponding one by one to the methods / operations / steps / actions described in the first aspect and / or the second aspect. The module can be a hardware circuit, software, or a combination of a hardware circuit and software. In one design, the device can include a processing module and a communication module for implementing the methods described in the first aspect and / or the second aspect.

[0031] In a possible design, a processing module is configured to switch from a first BWP pair to a second BWP pair of a terminal device. The downlink BWP of the first BWP pair is used for multiple terminal devices in the cell where the terminal device is located to receive paging messages from a network device. Among them, the multiple terminal devices include the terminal device. When on the first BWP pair, the radio resource control (RRC) state of the terminal device is the radio resource control - idle (RRC_IDLE) state or the radio resource control - inactive (RRC_INACTIVE) state. The processing module uses a communication module to access the network device on the second BWP pair. The first BWP pair is a common BWP pair.

[0032] In a possible design, a processing module is configured to switch from a first BWP pair to a second BWP pair of a terminal device. The downlink BWP of the first BWP pair is used for multiple terminal devices in the cell where the terminal device is located to receive paging messages from a network device. Among them, the multiple terminal devices include the terminal device. When on the first BWP pair, the radio resource control (RRC) state of the terminal device is the radio resource control - inactive (RRC_INACTIVE) state. The processing module uses a communication module to transmit specific information of the terminal device to the network device on the second BWP pair. When on the second BWP pair, the RRC state of the terminal device is the RRC_INACTIVE state. The first BWP pair is a common BWP pair.

[0033] For the switching from the first BWP pair to the second BWP, the configuration of the second BWP pair, etc., reference may be made to the corresponding content in the first aspect, which will not be elaborated here.

[0034] In a sixth aspect, a device is provided. The device may be a network device, a device in a network device, or a device that can be used in cooperation with a network device. In one design, the device may include modules corresponding one by one to the methods / operations / steps / actions described in the third aspect and / or the fourth aspect. The module may be a hardware circuit, software, or a combination of a hardware circuit and software. In one design, the device may include a processing module and a communication module for implementing the methods described in the third aspect and / or the fourth aspect.

[0035] In a possible design, a processing module utilizes a communication module to send one or more of a broadcast message, a paging message, and system information to a plurality of terminal devices in a cell where the terminal device is located on a first BWP pair. Among them, the plurality of terminal devices includes the terminal device, and when on the first BWP pair, the radio resource control (RRC) state of the terminal device is the radio resource control - idle (RRC_IDLE) state or the radio resource control - inactive (RRC_INACTIVE) state; perform a random access procedure with the terminal device on a second BWP pair of the terminal device. The first BWP pair is a common BWP pair.

[0036] In a possible design, a processing module utilizes a communication module to send one or more of a broadcast message, a paging message, and system information to a plurality of terminal devices in a cell where the terminal device is located on a first BWP pair. Among them, the plurality of terminal devices includes the terminal device, and when on the first BWP pair, the radio resource control (RRC) state of the terminal device is the radio resource control - inactive (RRC_INACTIVE) state; transmit specific information of the terminal device with the terminal device on a second BWP pair of the terminal device. Among them, when on the second BWP pair, the RRC state of the terminal device is the RRC_INACTIVE state. The first BWP pair is a common BWP pair.

[0037] For the configuration of the second BWP pair and the like, reference may be made to the corresponding content in the first aspect, which will not be elaborated here.

[0038] In a seventh aspect, a device is provided. The device includes a processor for implementing the method described in the first aspect and / or the second aspect above. Optionally, the device includes a memory for storing instructions and data. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the first aspect and / or the second aspect above can be implemented. The device may further include a communication interface for the device to communicate with other devices. Exemplarily, the communication interface may be a transceiver, a circuit, a bus, a module, a pin, or other types of communication interfaces, and the other devices may be network devices.

[0039] In a possible design, the device includes: a memory for storing instructions; a processor for switching from a first BWP pair to a second BWP pair of the terminal device, where the downlink BWP of the first BWP pair is used for a plurality of terminal devices in the cell where the terminal device is located to receive paging messages from a network device. Among them, the plurality of terminal devices includes the terminal device, and when on the first BWP pair, the radio resource control (RRC) state of the terminal device is the radio resource control - idle (RRC_IDLE) state or the radio resource control - inactive (RRC_INACTIVE) state; the processor uses a communication interface to access the network device on the second BWP pair. The first BWP pair is a common BWP pair.

[0040] In a possible design, the device includes: a memory for storing instructions; a processor for switching from a first BWP pair to a second BWP pair of the terminal device, where the first BWP pair is used for a plurality of terminal devices in the cell where the terminal device is located to receive paging messages from a network device. Among them, the plurality of terminal devices includes the terminal device, and when on the first BWP, the radio resource control (RRC) state of the terminal device is the radio resource control - inactive (RRC_INACTIVE) state; the processor uses a communication interface to transmit specific information of the terminal device to the network device on the second BWP pair of the terminal device. Among them, when on the second BWP pair, the RRC state of the terminal device is the RRC_INACTIVE state. The first BWP pair is a common BWP pair.

[0041] In an eighth aspect, a device is provided. The device includes a processor for implementing the method described in the above third aspect and / or fourth aspect. Optionally, the device includes a memory for storing instructions and data. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the above third aspect and / or fourth aspect can be implemented. The device may further include a communication interface, and the communication interface is used for the device to communicate with other devices. Exemplarily, the communication interface may be a transceiver, a circuit, a bus, a module, a pin, or other types of communication interfaces, and the other devices may be terminal devices.

[0042] In a possible design, the apparatus includes: a memory for storing instructions; a processor for using a communication interface to send one or more of a broadcast message, a paging message, and system information to a plurality of terminal devices in the cell where the terminal device is located on a first BWP pair, where the plurality of terminal devices includes the terminal device, and the radio resource control (RRC) state of the terminal device is the radio resource control_idle (RRC_IDLE) state or the radio resource control_inactive (RRC_INACTIVE) state when on the first BWP pair; and perform a random access procedure with the terminal device on a second BWP pair of the terminal device. The first BWP pair is a common BWP pair.

[0043] In a possible design, the apparatus includes: a memory for storing instructions; a processor for using a communication interface to send one or more of a broadcast message, a paging message, and system information to a plurality of terminal devices in the cell where the terminal device is located on a first BWP pair, where the plurality of terminal devices includes the terminal device, and the radio resource control (RRC) state of the terminal device is the radio resource control_inactive (RRC_INACTIVE) state when on the first BWP pair; and transmit specific information of the terminal device with the terminal device on a second BWP pair of the terminal device, where the RRC state of the terminal device is the RRC_INACTIVE state when on the second BWP pair. The first BWP pair is a common BWP pair.

[0044] In a ninth aspect, there is provided a computer-readable storage medium including instructions which, when run on a computer, cause the computer to execute at least one method described in the first aspect to the fourth aspect.

[0045] In a tenth aspect, there is provided a computer program product including instructions which, when run on a computer, cause the computer to execute at least one method described in the first aspect to the fourth aspect.

[0046] In an eleventh aspect, there is provided a chip system which includes a processor and may further include a memory for implementing at least one method described in the first aspect to the fourth aspect. The chip system may be composed of chips or may include chips and other discrete devices.

[0047] In a twelfth aspect, there is provided a system which includes the apparatus (such as a terminal device) described in the fifth aspect or the seventh aspect, and the apparatus (such as a network device) described in the sixth aspect or the eighth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 The figure shows an example diagram of communication between a base station and a UE on a BWP pair provided in an embodiment of the present application;

[0049] Figure 2 The figure shows a flowchart example of the technical solution provided by an embodiment of the present application;

[0050] Figure 3 The figure shows an example diagram of the RRC state transition of the UE provided by an embodiment of the present application;

[0051] Figure 4A and Figure 4B The figure shows a flowchart example of the process of the UE accessing the base station provided by an embodiment of the present application;

[0052] FIG. 5A to FIG. 5L The figure shows a flowchart example of the process of the UE in the RRC_INACTIVE state transmitting UE-specific information using a second BWP pair provided by an embodiment of the present application;

[0053] Figure 6 and Figure 7 The figure shows an example diagram of the device provided by an embodiment of the present application. Detailed implementation manners

[0054] The technical solution provided by an embodiment of the present application can be applied to various communication systems, such as: Long-Term Evolution (LTE) systems, 5th generation (5G) mobile communication systems, Wireless Fidelity (WiFi) systems, future communication systems, or systems integrating multiple communication systems, etc. The embodiments of the present application do not make limitations. Among them, 5G can also be referred to as New Radio (NR).

[0055] The technical solution provided by an embodiment of the present application can be applied to various communication scenarios, for example, it can be applied to one or more of the following communication scenarios: enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), machine type communication (MTC), massive machine type communication (mMTC), device-to-device (D2D), vehicle to everything (V2X), vehicle to vehicle (V2V), and Internet of Things (IoT), etc.

[0056] The technical solutions provided in the embodiments of this application can be applied to communications between communication devices. Communications between communication devices may include: communications between a network device and a terminal device, communications between network devices, and / or communications between terminal devices. In the embodiments of this application, the term "communication" may also be described as "transmission", "information transmission", or "signal transmission", etc. Transmission may include sending and / or receiving. In the embodiments of this application, the technical solutions are described by taking the communication between a network device and a terminal device as an example. Those skilled in the art can also use this technical solution for communications between other scheduling entities and subordinate entities, such as communications between a macro base station and a micro base station, for example, communications between a first terminal device and a second terminal device. Among them, the scheduling entity may allocate radio resources to the subordinate entity. The radio resources include one or more of the following resources: time domain resources, frequency domain resources, code resources, and spatial resources. In the embodiments of this application, "multiple" may be two, three, four, or more, and the embodiments of this application do not make limitations.

[0057] In the embodiments of this application, the communication between a network device and a terminal device includes: the network device sending downlink signals / information to the terminal device, and / or the terminal device sending uplink signals / information to the network device.

[0058] In the embodiments of this application, " / " may indicate that the objects associated before and after are an "or" relationship. For example, A / B may indicate A or B; "and / or" may be used to describe three relationships of associated objects. For example, A and / or B may indicate: A exists alone, A and B exist simultaneously, and B exists alone. Among them, A and B may be singular or plural. In the embodiments of this application, words such as "first" and "second" may be used to distinguish technical features with the same or similar functions. These words such as "first" and "second" do not limit the quantity and execution order, and these words such as "first" and "second" do not necessarily limit to be different. In the embodiments of this application, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. The embodiments or design solutions described as "exemplary" or "for example" should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Using words such as "exemplary" or "for example" aims to present relevant concepts in a specific manner for easy understanding.

[0059] The terminal device involved in the embodiments of this application can also be referred to as a terminal. It can be a device with wireless transceiver functions, which can be deployed on land, including indoors, outdoors, and / or handheld or vehicle-mounted; it can also be deployed on the water (such as a ship, etc.); it can also be deployed in the air (such as an airplane, a balloon, a satellite, etc.). The terminal device can be a user equipment (UE). The UE includes handheld devices, vehicle-mounted devices, wearable devices or computing devices with wireless communication functions. Exemplarily, the UE can be a mobile phone, a tablet computer or a computer with wireless transceiver functions. The terminal device can also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote medical treatment, a wireless terminal in a smart grid, a wireless terminal in a smart city, and / or a wireless terminal in a smart home, etc.

[0060] In the embodiments of this application, the device for implementing the functions of the terminal device can be the terminal device; it can also be a device capable of supporting the terminal device to implement such functions, such as a chip system, which can be installed in the terminal device or used in matching with the terminal device. In the embodiments of this application, the chip system can be composed of chips, or can also include chips and other discrete devices. In the technical solutions provided in the embodiments of this application, taking the device for implementing the functions of the terminal device as the terminal device, and taking the terminal device as a UE as an example, the technical solutions provided in the embodiments of this application are described.

[0061] The network device involved in the embodiments of this application includes a base station (BS), which can be a device deployed in a radio access network and capable of wireless communication with a terminal device. The base station may have various forms, such as a macro base station, a micro base station, a relay station, an access point, etc. The base station involved in the embodiments of this application can be a base station in a 5G system or a base station in an LTE system. Among them, the base station in the 5G system can also be referred to as a transmission reception point (TRP) or a next-generation Node B (generation Node B, gNB or gNodeB). In the embodiments of this application, the device for implementing the functions of the network device can be the network device; it can also be a device capable of supporting the network device to implement such functions, such as a chip system, which can be installed in the network device or used in matching with the network device. In the technical solutions provided in the embodiments of this application, taking the device for implementing the functions of the network device as the network device, and taking the network device as a base station as an example, the technical solutions provided in the embodiments of this application are described.

[0062] In a communication system, a UE can access a base station and communicate with the base station. Exemplarily, a base station can manage one or more (such as 3 or 6, etc.) cells. The UE can access the base station in at least one of the one or more cells and communicate with the base station in the cell accessed by the UE. In the embodiments of the present application, at least one can be 1, 2, 3 or more, and the embodiments of the present application do not make any restrictions.

[0063] In a possible implementation, Figure 1 The figure shows an example diagram of communication between a base station and a UE on a bandwidth part (BWP) pair.

[0064] As Figure 1As shown, after power-on, when the UE wants to access the base station, it can receive the synchronization signal and broadcast channel from the base station, and can receive system information from the base station, such as receiving system information block (SIB) 1. This system information can indicate the configuration information of the initial BWP pair, and the UE can access the base station on the initial BWP pair. During the process of accessing the base station or after accessing the base station, after establishing a radio resource control (RRC) connection with the base station, the state of the UE is the RRC_CONNECTED state. The UE can perform data transmission with the base station on the initial BWP pair. On the initial BWP pair, the base station can configure at least one BWP pair (the configured BWP pair of the UE) for the UE through signaling, and can configure the active BWP pair for the UE from the at least one BWP pair. After the UE switches from the initial BWP pair to the active BWP pair, the UE can send a physical uplink shared channel (PUSCH) to the base station and / or receive the specific physical downlink shared channel (PDSCH) of the UE from the base station on the active BWP pair. Among them, the active BWP pair can be the same as or different from the initial BWP pair, and the embodiments of this application do not make restrictions. In the RRC_CONNECTED state, the base station can reconfigure the active BWP pair of the UE and / or reconfigure the configured BWP pair of the UE. Subsequently, if after the RRC release process, when the state of the UE changes from the RRC_CONNECTED state to the RRC_IDLE state or the RRC_INACTIVE state, the UE switches from the active BWP pair to the above-mentioned initial BWP pair to receive paging messages, synchronization signals, broadcast channels, and / or system information, etc. from the base station, that is, the UE camps on the initial BWP pair. Subsequently, if it is desired to implement the RRC establishment or RRC recovery process to change the UE from the RRC_IDLE state or the RRC_INACTIVE state to the RRC_CONNECTED state again, the UE accesses the base station on the initial BWP pair, such as performing a random access process, an RRC establishment process, and / or an RRC recovery process, etc. on the initial BWP pair.

[0065] In a communication scenario, such as in an mMTC or Internet of Things communication scenario, a new type of UE is introduced, which can be referred to as a New Radio Lite (NR-lite) UE. The characteristics of the NR-lite UE include at least one of the following: supporting a smaller bandwidth, requiring low power consumption, and / or being used for bursty small packet transmissions. The UE can also be referred to as a lightweight UE, a simple UE, or other names, which are not limited in the embodiments of this application. Based on the characteristics of the NR-lite UE, in order to reduce the power consumption of the NR-lite UE, when there is no data transmission for the UE for a period of time, the UE can be set to the RRC_IDLE state or the RRC_INACTIVE state; when the UE has a new small packet transmission, the UE accesses the base station on the initial BWP pair and establishes an RRC connection with the base station, and switches to the RRC_CONNECTED state. Since the initial BWP pair is a common BWP pair in the cell and usually has a narrow bandwidth, when there are many NR-lite UEs in the communication scenario and they need to frequently switch between the RRC_IDLE state or the RRC_INACTIVE state and the RRC_CONNECTED state, a large number of NR-lite UEs will simultaneously access the base station on the same narrowband BWP pair, resulting in congestion and a low access success rate. Further, when a large number of NR-lite UEs and the base station perform data transmission on the initial BWP pair, such as transmitting PDSCH and / or PUSCH, data congestion will occur due to the narrow bandwidth of the initial BWP pair, and the data transmission delay will be large.

[0066] The embodiments of this application use the NR-lite UE as an example to illustrate the technical problems, but the embodiments of this application can be applied to various types of UEs, such as traditional (legacy) UEs or ordinary UEs, etc., to improve the access success rate of the UE or improve the user experience.

[0067] In order to reduce congestion, the embodiments of this application provide a new method for communicating on a BWP (pair), which can be used both for the design based on the BWP pair and for the design based on the BWP.

[0068] In the embodiments of the present application, in the design based on BWP pairs: A BWP can be used for downlink signal transmission or uplink signal transmission, but cannot be used for both downlink signal transmission and uplink signal transmission. In this design, when the base station and the UE communicate on a carrier, one or more BWP pairs can be configured for the UE from the resources of the carrier for communication between the base station and the UE. A BWP pair can include at least one downlink BWP and at least one uplink BWP. For example, a BWP pair includes one downlink BWP and one uplink BWP, or a BWP pair includes one downlink BWP, one uplink BWP, and one supplementary uplink (SUL) BWP. In a BWP, for example, in a downlink BWP or an uplink BWP, it can include a continuous frequency-domain resource, such as including several consecutive subcarriers, resource blocks (RBs), or resource block groups (RBGs), etc.

[0069] For a BWP pair, when the base station and the UE communicate on this BWP pair, downlink signal transmission is performed on the downlink BWP in this BWP pair, and this downlink signal is sent from the base station to the UE; uplink signal transmission is performed on the uplink BWP in this BWP pair, and this uplink signal is sent from the UE to the base station. Exemplarily, the base station sends a paging message, a synchronization signal, a broadcast channel, a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), and / or a reference signal, etc. to the UE on the downlink BWP; and / or, the UE sends a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and / or a reference signal, etc. to the base station on the uplink BWP.

[0070] Optionally, the base station can configure one or more (for example, configure 2, 3, 4, or other numbers) candidate BWP pairs for the UE, and the base station can configure at least one active BWP pair for the UE from the one or more candidate BWP pairs, and this active BWP pair can be used for data transmission between the base station and the UE.

[0071] In the embodiments of the present application, in the design based on BWP: One BWP can be used for both downlink signal transmission and uplink signal transmission. In this design, when the base station and the UE communicate on a carrier, one or more BWPs can be configured for the UE from the resources of the carrier for communication between the base station and the UE. A BWP can include a continuous frequency-domain resource, for example, including a number of continuous subcarriers, or resource blocks (RBs), etc. The BWP can include an uplink part and / or a downlink part.

[0072] Exemplarily, for one BWP, when the base station and the UE communicate on this BWP, if the BWP includes a downlink resource part, the base station sends a paging message, a synchronization signal, a broadcast channel, PDCCH, PDSCH, and / or a reference signal to the UE on the downlink resource part of this BWP; and / or, if the BWP includes an uplink resource part, the UE sends PUSCH, PUCCH, and / or a reference signal, etc. to the base station on the uplink resource part of this BWP.

[0073] Optionally, the base station can configure one or more candidate BWPs for the UE, and the base station can configure at least one active BWP for the UE from the one or more candidate BWPs, and this active BWP is used for data transmission between the base station and the UE.

[0074] The method provided in the embodiments of the present application is applicable to both the above-mentioned design based on BWP pairs and the above-mentioned design based on BWP. For the sake of simplicity of description, the technical solution provided in the embodiments of the present application is described by taking the design based on BWP pairs as an example. When this solution is used for the design based on BWP, replace the BWP pair with BWP (for example, denoted as BWP A), then replace the uplink BWP in the BWP pair with BWP A (for example, the uplink resource part in BWP A), and replace the downlink BWP in the BWP pair with BWP A (for example, the downlink resource part in BWP A), that is, the functions of the downlink BWP and the uplink BWP in the BWP pair are both implemented on BWP A. In addition, the BWP (including the uplink BWP, the downlink BWP, or the BWP introduced in the design based on BWP) in the technical solution provided in the embodiments of the present application is intended to illustrate the resources for communication, and this BWP can also be replaced with a sub-band, a transmission bandwidth, and / or a component carrier, etc., and the embodiments of the present application do not make any restrictions.

[0075] Figure 2 The figure shows a flow example diagram of the technical solution provided in the embodiments of the present application.

[0076] Operation 201, the RRC state of the UE is the RRC_IDLE state or the RRC_INACTIVE state, and the UE camps on the first BWP pair.

[0077] As described above, the UE can access the base station and communicate with the base station. During the process of accessing the base station or after accessing the base station, the UE can perform the RRC establishment process with the base station. After establishing an RRC connection with the base station, the RRC state of the UE is the RRC_CONNECTED state. Subsequently, the RRC state of the UE can be converted among the following states: RRC_IDLE state, RRC_CONNECTED state, and RRC_INACTIVE state.

[0078] Figure 3 The following is an example diagram of the RRC state transition of the UE provided by the embodiment of the present application. As Figure 3 shown:

[0079] 1. When in the RRC_CONNECTED state, the base station can, through the RRC release process, for example, send an RRC release (RRCRelease) message to the UE, causing the UE's state to transition from the RRC_CONNECTED state to the RRC_IDLE state or the RRC_INACTIVE state.

[0080] Exemplarily, when the UE is in the RRC_CONNECTED state, there is a connection between the UE and the base station. At this time, the base station knows that the UE is within the coverage area or management range of this base station. For example, the base station knows that the UE is within the coverage area of the cell managed by this base station; the core network knows within the coverage area or management range of which base station the UE is, and the core network knows through which base station the UE can be located or found.

[0081] When the UE is in the RRC_CONNECTED state, the base station and the UE can perform the transmission of UE-specific data channels and / or control channels, so as to transmit the specific information or unicast information of this UE. For example, the base station can send a UE-specific physical downlink control channel (physical downlink control channel, PDCCH) and / or PDSCH to the UE, and / or the UE can send a UE-specific PUSCH and / or physical uplink control channel (physical uplink control channel, PUCCH) to the base station.

[0082] Exemplarily, the UE-specific PDCCH satisfies one or more of the following conditions: the resource location of the PDCCH is UE-specific, the cyclic redundancy check (CRC) of the PDCCH is scrambled by the identifier of the UE, and the PDCCH is used to schedule the UE-specific PDSCH or PUSCH. Among them, the PDCCH is used to schedule the PDSCH and / or PUSCH can also be described as: the PDCCH is used to carry the transmission parameters of the PDSCH and / PUSCH. The transmission parameters of the PDSCH or PUSCH include one or more of the following parameters: time-domain resource location, frequency-domain resource location, modulation and coding scheme (MCS), modulation mechanism, coding mechanism, transport block size (TBS), redundancy version (RV), hopping indication, and power control command. In the embodiments of the present application, the identifier of the UE may be the cell radio network temporary identifier (C-RNTI) of the UE or other types of radio network temporary identifiers (RNTIs) of the UE.

[0083] Exemplarily, the UE-specific PDSCH satisfies one or more of the following conditions: the transmission parameters of the PDSCH are UE-specific or specific to the UE group to which the UE belongs, the PDSCH is scheduled by the UE-specific PDCCH, the CRC of the PDSCH is scrambled by the identifier of the UE, and the information carried on the PDSCH is UE-specific or specific to the UE group to which the UE belongs.

[0084] Exemplarily, the UE-specific PUSCH satisfies one or more of the following conditions: the transmission parameters of the PUSCH are UE-specific or specific to the UE group to which the UE belongs, the PUSCH is scheduled by the UE-specific PDCCH, the CRC of the PUSCH is scrambled by the identifier of the UE, and the information carried on the PUSCH is UE-specific or specific to the UE group to which the UE belongs.

[0085] Exemplarily, the UE-specific PUCCH satisfies one or more of the following conditions: the transmission parameters of the PUCCH are UE-specific or specific to the UE group to which the UE belongs, the CRC of the PUCCH is scrambled by the identifier of the UE, and the information carried on the PUCCH is UE-specific or specific to the UE group to which the UE belongs.

[0086] 2. In the RRC_IDLE state, the UE can, through the RRC establishment procedure, change its state from the RRC_IDLE state to the RRC_CONNECTED state. In the RRC_IDLE state, after receiving a paging message from the base station or being triggered by the upper layer of the UE, the UE can initiate the RRC establishment procedure, attempting to establish an RRC connection with the base station to enter the RRC_CONNECTED state. For example, the RRC establishment procedure between the UE and the base station includes: the UE sends an RRC establishment request (RRCSetupResuest) message to the base station. After receiving this request: the base station sends an RRC establishment (RRCSetup) message to the UE, enabling the UE's state to be changed to the RRC_CONNECTED state; or, the base station sends an RRC rejection (RRCReject) message to the UE, causing the UE to remain in the RRC_IDLE state.

[0087] When the UE is in the RRC_IDLE state, there is no connection between the UE and the base station. At this time, the base station does not know whether the UE is within the coverage area or under the management of this base station. For example, the base station does not know whether the UE is within the coverage area of the cell managed by this base station; the core network does not know within the coverage area or under the management of which base station the UE is, and the core network does not know through which base station it can locate or find the UE.

[0088] When the UE is in the RRC_IDLE state, the UE can receive paging messages, synchronization signals, broadcast messages, and / or system information, etc. from the base station. At this time, the UE cannot perform unicast data transmission with the base station. For example, it cannot receive the UE-specific PDSCH and PDCCH from the base station, or cannot send the UE-specific PUSCH and PUCCH to the base station.

[0089] In the embodiments of this application, the scenarios where the upper layer of the UE triggers the UE to initiate the RRC establishment procedure include but are not limited to: the UE needs to send information to the base station. Exemplarily, the service data adaptation protocol (SDAP) layer, packet data convergence protocol (PDCP) layer, and / or radio link control (RLC) layer of the UE trigger the RRC layer of the UE to perform the RRC establishment procedure with the base station. The RRC layer of the UE triggers the media access control (MAC) layer of the UE to perform an access procedure with the base station, thereby performing the RRC establishment procedure with the base station during or after the access procedure.

[0090] 3. When in the RRC_INACTIVE state, the UE can transition its state from RRC_INACTIVE to RRC_CONNECTED through the RRC establishment or RRC resume process; the base station can transition the UE's state from RRC_INACTIVE to RRC_IDLE through the RRC release process. When in the RRC_INACTIVE state, after receiving a paging message from the base station or being triggered by the UE's upper layer, the UE can initiate the RRC resume process to attempt to resume the RRC connection with the base station to enter the RRC_CONNECTED state. For example, the RRC resume process between the UE and the base station includes: the UE sends an RRC resume request (RRCResumeRequest) message to the base station. After receiving this request: the base station sends an RRC setup (RRCSetup) message or an RRC resume (RRCResume) message to the UE, enabling the UE's state to be transitioned to RRC_CONNECTED; or, the base station sends an RRC release (RRCRelease) message to the UE, causing the UE's state to transition from RRC_INACTIVE to RRC_IDLE; or, the base station sends an RRC reject (RRCReject) message to the UE, causing the UE to remain in the RRC_INACTIVE state.

[0091] When the UE is in the RRC_INACTIVE state, there is no connection between the UE and the base station. At this time, the base station does not know whether the UE is within the coverage area or under the management of this base station. For example, the base station does not know whether the UE is within the coverage area of the cell managed by this base station; the core network knows within the coverage area or under the management of which base station the UE is, and the core network knows through which base station the UE can be located or found.

[0092] When the UE is in the RRC_INACTIVE state, the UE can receive paging messages, synchronization signals, broadcast messages, and / or system information, etc. from the base station.

[0093] In an embodiment of the present application, the UE camps on the first BWP pair. The downlink BWP of the first BWP pair is used to receive paging messages from the base station. The first BWP pair may be the initial BWP pair described above. The downlink BWP of the first BWP pair may also be used to receive one or more of the following information from the base station: synchronization signal (SS), physical broadcast channel (PBCH), and system information. The synchronization signal may be an independent signal, for example, it may be (synchronization signal, SS); it may also include multiple separate signals, for example, it may include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). The PSS, SSS, and PBCH may be transmitted in a separate form or in a combined form, and the embodiments of the present application do not make any restrictions. When the PSS, SSS, and PBCH are transmitted in a combined form, this combination may be referred to as a synchronization signal block (SSB). The information carried on the PBCH may also be referred to as the master information block (MIB). The system information may be carried on the PDSCH in the form of a system information block (SIB). The PDSCH may be considered a common PDSCH and can be received by all UEs in the cell.

[0094] The UE camping on the first BWP pair may also be described as: the RRC state of the UE is in the RRC_INACTIVE state or the RRC_CONNECTED state, and the UE listens for paging messages on the first BWP pair. The UE may also receive SSB and / or system information from the base station on the first BWP pair.

[0095] The first BWP pair is a common BWP pair used for multiple UEs in the cell where the UE is located to receive the above paging messages, SSB, and / or system information. For example, it is used for all UEs in the cell where the UE is located, or for a group of UEs in the cell where the UE is located. Among them, the group of UEs is multiple UEs in the cell where the UE is located, and the group of UEs includes the UE. In an embodiment of the present application, the group of UEs may include 2, 3, 4, 5, or more UEs, and the embodiments of the present application do not make any restrictions.

[0096] Operation 202, the UE switches from the first BWP pair to the second BWP pair, transmits UE-specific information to the base station on the second BWP, or accesses the base station.

[0097] Exemplarily, as Figure 1 and Figure 3 shown, after the UE and the base station establish an RRC connection, the RRC state of the UE is the RRC_CONNECTED state, and the base station and the UE can then transmit UE-specific data channels and / or control channels. Assume that when the UE is in the RRC_CONNECTED state, the UE operates on the fourth BWP pair. The fourth BWP pair can be the same as or different from the first BWP pair, the second BWP pair, or the third BWP pair, and the embodiments of the present application do not make any restrictions. Subsequently, the base station can send an RRC release message to the UE, causing the state of the UE to transition to the RRC_IDLE state or the RRC_INACTIVE state. Then the UE switches from the fourth BWP pair to the first BWP pair, camps on the first BWP pair, and listens for paging messages on the first BWP pair. After being triggered by the upper layer of the UE, or after the UE receives a paging message from the base station on the downlink BWP of the first BWP pair, the UE switches from the first BWP pair to the second BWP pair. The UE accesses the base station on the second BWP pair, or transmits UE-specific information to the base station on the second BWP pair. Optionally, the base station can also send one or more of a paging message, a synchronization signal, a PBCH, and a system message to the UE on the second BWP pair.

[0098] In this case, when the UE is in the RRC_IDLE state or the RRC_INACTIVE state, it camps on the common first BWP pair to listen for paging messages. When the UE needs to transmit information to the base station, the UE switches from the common first BWP pair to the second BWP pair of the UE to access the base station on the second BWP pair, or transmit UE-specific information to the base station on the second BWP pair. By this method, multiple UEs can be scattered to access the base station or transmit information on their respective specific second BWP pairs, avoiding congestion.

[0099] The second BWP pair is specific to the UE or specific to the UE group to which the UE belongs.

[0100] In a possible design, the first BWP pair is used for all UEs in the cell where the UE is located, and the second BWP pair is specific to the UE or specific to the first UE group to which the UE belongs. The first UE group includes the UE.

[0101] In a possible design, the first BWP pair is used for the second UE group in the cell, and the second BWP pair is specific to the UE. In the cell, the specific second BWP pairs of different UEs can be the same or different, and the embodiments of the present application do not make any restrictions. The second UE group includes the UE.

[0102] The above first UE group and second UE group may be the same or different, and the embodiments of the present application do not limit this.

[0103] For operation 202, there may be the following Design 1 and Design 2.

[0104] Design 1: When the UE resides in the first BWP pair, the RRC state of the UE is RRC_IDLE or RRC_INACTIVE. The base station is accessed on the second BWP pair.

[0105] The method can be described as: The UE switches from the first BWP pair to the second BWP pair of the UE. The downlink BWP of the first BWP pair is used for multiple UEs in the cell where the UE is located to receive paging messages from the base station. Among them, the multiple UEs include the UE, and the RRC state of the UE on the first BWP pair is the RRC_IDLE state or the RRC_INACTIVE state; the UE accesses the base station on the second BWP pair.

[0106] Exemplarily, as described above, a UE in the RRC_IDLE state or the RRC_INACTIVE state resides on the first BWP pair and listens for paging messages on the first BWP pair. When the upper layer of the UE triggers uplink data transmission, or when the UE receives a paging message from the base station on the downlink BWP of the first BWP pair to trigger downlink data transmission, the UE switches from the first BWP pair to the second BWP pair and accesses the base station on the second BWP pair. During or after accessing the base station, the UE can perform RRC establishment with the base station on the second BWP pair, so that the state of the UE is converted from the RRC_IDLE state or the RRC_INACTIVE state to the RRC_CONNECTED state. Subsequently, the base station and the UE can perform transmission of UE-specific data channels and / or control channels on the second BWP pair.

[0107] When the UE resides on the first BWP pair and the RRC state of the UE is the RRC_IDLE or RRC_INACTIVE state, through the method shown in Design 1, for multiple UEs in the cell, the multiple UEs reside on the same common first BWP pair, but access the base station on their respective second BWP pairs, so that the multiple UEs can be dispersed to access the base station on multiple second BWP pairs, reducing the collision between the multiple UEs, reducing congestion, and improving the access success rate of the UEs.

[0108] In the embodiments of the present application, when the UE accesses the base station, a four-step access method or a two-step access method can be adopted.

[0109] Exemplarily, Figure 4AThe figure shows an example flowchart of the four-step access method. In the four-step access method, the UE sends a preamble to the base station through the physical random access channel (PRACH), that is, sends message 1 to the base station; after receiving the preamble, the base station sends a random access response (RAR) to the UE, that is, the base station sends message 2 to the UE, and the RAR can indicate the resource location of the PUSCH; the UE sends message 3 to the base station through the PUSCH according to the resource location of the PUSCH indicated by message 2; after receiving message 3, the base station can send message 4 to the UE. Optionally, message 3 may include an RRC setup request (RRCSetupResuest) message or an RRC resume request (RRCResumeResuest) message. Optionally, message 4 may include one or more of the following information: an RRC setup (RRCSetup) message, an RRC resume (RRCResume) message, an acknowledgement / negative acknowledgement (NACK) of the PUSCH in message 3, and a power control command, etc.

[0110] Exemplarily, Figure 4B The figure shows an example flowchart of the two-step access method. In the two-step access method, the UE sends a preamble to the base station through the PRACH and sends uplink data to the base station through the PUSCH, that is, the UE sends message A to the base station; after receiving message A, the base station sends message B to the UE. Optionally, message A may include an RRC setup request (RRCSetupResuest) message or an RRC resume request (RRCResumeResuest) message. Optionally, message B may include one or more of the following information: an RRC setup (RRCSetup) message, an RRC resume (RRCResume) message, an ACK / NACK of the PUSCH in message A, and a power control command, etc.

[0111] Optionally, when in the first BWP pair, the RRC state of the UE is in the RRC_IDLE state or the RRC_INACTIVE state. The UE switches from the first BWP pair to the second BWP pair and accesses the base station in the second BWP pair. After accessing the base station or during the access process, the UE and the base station perform an RRC establishment process, so that the RRC state of the UE switches from the RRC_IDLE state or the RRC_INACTIVE state to the RRC_CONNECTED state.

[0112] Optionally, when the first BWP pair is in use and the UE is in the RRC_INACTIVE state, the UE switches from the first BWP pair to the second BWP pair and accesses the base station on the second BWP pair. After accessing the base station or during the access process, the UE and the base station perform an RRC resume process, causing the UE's RRC state to switch from the RRC_INACTIVE state to the RRC_CONNECTED state.

[0113] When the UE switches to the second BWP pair, operates on the second BWP pair, and the UE's RRC state is the RRC_CONNECTED state, the base station and the UE can transmit UE-specific data channels and / or control channels on the second BWP pair.

[0114] In an embodiment of this application, when the base station and the UE transmit UE-specific data channels and / or control channels on the second BWP pair, the base station can send a UE-specific physical downlink control channel (PDCCH) and / or PDSCH to the UE on the downlink BWP in the second BWP pair, and / or the UE can send a UE-specific PUSCH to the base station on the uplink BWP in the second BWP pair.

[0115] Optionally, in an embodiment of this application, when the UE operates on the second BWP pair and the UE's RRC state is the RRC_CONNECTED state, the base station can further configure a new active BWP pair for the UE, such as a third BWP pair; the UE switches from the second BWP pair to the third BWP pair and transmits UE-specific data channels and / or control channels to the base station on the third BWP pair. By this method, the base station can update the active BWP pair of the UE according to the UE's service type, channel conditions, or system load, etc., so that the signal quality on the active BWP pair used for communication between the base station and the UE is higher or there are more available resources, thereby making the information transmission success rate higher or the transmission rate higher.

[0116] In an embodiment of the present application, when the base station configures a new active BWP pair for the UE, for example, on the downlink BWP of the second BWP pair, the base station sends a PDCCH to the UE, and the PDCCH indicates that the new active BWP pair for the UE is the third BWP pair in the set of candidate BWP pairs of the UE. After receiving the PDCCH, the UE switches from the second BWP pair to the third BWP pair, and transmits UE-specific data channels and / or control channels with the base station on the third BWP pair. The method for the UE to transmit UE-specific data channels and / or control channels with the base station on the third BWP pair is similar to the method for the UE to transmit UE-specific data channels and / or control channels with the base station on the second BWP pair above, and the second BWP pair above can be replaced with the third BWP pair, which will not be elaborated here. Among them, the set of candidate BWP pairs of the UE includes one or more BWP pairs, and the set of candidate BWP pairs can be configured for the UE through a broadcast channel, a system message, an RRC message, or a MAC control element (CE).

[0117] Design 2: When the UE resides in the first BWP pair, the RRC state of the UE is RRC_INACTIVE. The UE resides in the second BWP pair and The base station transmits UE specific information.

[0118] This method can be described as: The UE switches from the first BWP pair to the second BWP pair. The downlink BWP of the first BWP pair is used for multiple UEs in the cell where the UE is located to receive paging messages from the base station. Among them, the multiple UEs include the UE, and the RRC state of the UE is in the RRC_INACTIVE state when on the first BWP pair; The UE transmits the specific information of the UE with the base station on the second BWP pair. Among them, when on the second BWP pair, the RRC state of the UE is in the RRC_INACTIVE state. For example, when transmitting the specific information of the UE with the base station on the second BWP pair, the RRC state of the UE is in the RRC_INACTIVE state.

[0119] In this design, a UE in the RRC_INACTIVE state can use the second BWP pair to perform unicast data transmission or transmit UE-specific information. When on the first BWP pair, the RRC state of the UE is in the RRC_INACTIVE state. The UE switches from the first BWP pair to the second BWP pair, and transmits UE-specific data channels and / or control channels with the base station on the second BWP pair.

[0120] Optionally, subsequently, the UE switches from the second BWP pair to the first BWP pair and continues to camp on the first BWP pair. During this process, the RRC state of the UE is in the RRC_INACTIVE state.

[0121] Exemplarily, as described above, a UE in the RRC_INACTIVE state camps on the first BWP pair and listens for paging messages on the first BWP pair. When the upper layer of the UE triggers an uplink data transmission, or when the UE receives a paging message from the base station on the downlink BWP of the first BWP pair to trigger a downlink data transmission, the UE switches from the first BWP pair to the second BWP pair, and the state of the UE remains in the RRC_INACTIVE state, and specific information of the UE is transmitted with the base station on the second BWP pair. After the transmission is completed, the UE can switch back from the second BWP pair to the first BWP pair and re-camp on the first BWP pair in the RRC_INACTIVE state to listen for paging messages, synchronization signals, broadcast messages, and / or system messages, etc.

[0122] When the UE camps on the first BWP pair and the RRC state of the UE is in the RRC_INACTIVE state, by the method shown in Design 2, for multiple UEs in the cell, the multiple UEs camp on the same common first BWP pair, but specific information of the UE is transmitted with the base station on the second BWP pair specific to each UE, so that the information of the multiple UEs can be dispersed on multiple second BWP pairs, reducing data congestion, avoiding too long transmission delay of the UE's information, and at the same time avoiding interference between the multiple UEs and improving the demodulation success rate of the UE's information.

[0123] FIG. 5A to FIG. 5E It is a flow example diagram of a UE in the RRC_INACTIVE state using the second BWP pair to transmit UE specific information.

[0124] Figure 5A As shown, it is an uplink data transmission.

[0125] Operation A501, the state of the UE is in the RRC_CONNECTED state, and the base station sends an RRC release message to the UE, causing the state of the UE to transition to the RRC_INACTIVE state.

[0126] When the state of the UE is in the RRC_CONNECTED state, the UE operates on the fourth BWP pair, and the fourth BWP pair can be the same as or different from the first BWP pair, the second BWP pair, or the third BWP pair, and the embodiments of the present application do not make limitations. Optionally, as described below, the RRC release message can also be used to indicate the configuration of the second BWP pair.

[0127] Operation A502, the UE camps on the first BWP pair.

[0128] After the state of the UE transitions from the RRC_CONNECTED state to the RRC_INACTIVE state, the UE camps on the first BWP pair.

[0129] Operation A503, the UE sends UE-specific data to the base station on the uplink BWP of the second BWP pair.

[0130] When triggered by the upper layer of the UE, the UE switches from the first BWP pair to the second BWP pair.

[0131] In Design 2, when the UE sends UE-specific data to the base station, it can be sent through the uplink physical layer data channel, such as through PUSCH. The transmission parameters of this PUSCH can be predefined, configured by the base station for the UE, or some types of transmission parameters are predefined and some types of transmission parameters are configured by the base station for the UE. This PUSCH satisfies one or more of the following conditions: the transmission parameters of this PUSCH are specific to this UE or the UE group where this UE is located, the CRC of this PUSCH is scrambled by the identifier of this UE, and the information carried on this PUSCH is specific to this UE or the UE group where this UE is located.

[0132] In Design 2, when the base station configures the transmission parameters of the PUSCH for the UE, it can be configured for the UE through one of the following information: the RRC release message in Operation A501, the PBCH sent to the UE on the first BWP pair or the second BWP pair, the system message, or the previously received PDCCH / PDSCH from the base station (such as the previously received PDCCH / PDSCH, the PDCCH / PDSCH received during the previous data transmission or the previous service transmission).

[0133] Exemplarily, in the embodiments of the present application, the UE-specific data / information sent by the UE to the base station or received from the base station may include one or more of the following service data / information: voice, video, email, chat information, electronic payment, and / or the browsed web page, etc.

[0134] Optionally, in Operation A504, the UE receives the acknowledgement (ACK) / negative acknowledgement (NACK) feedback of the PUSCH sent in Operation A503 on the downlink BWP of the second BWP pair.

[0135] In a service transmission, the UE can perform Operation A503 and Operation A504 at least once (such as 1 time, 2 times or more times, etc.). For example, in a service transmission, if there is a large amount of uplink data that the UE needs to send and cannot be completed through one PUSCH transmission, the UE can perform Operation A503 and Operation A504 multiple times. Another example is that the UE can perform multiple service transmissions through multiple PUSCH transmissions on the second BWP.

[0136] Operation A505, the UE re - camps on the first BWP pair again.

[0137] Exemplarily, after the UE transmits traffic to the base station one or more times, it switches from the second BWP pair to the first BWP pair and re - camps on the first BWP pair.

[0138] Exemplarily, after the UE transmits traffic to the base station one or more times, it starts the first timer. When the UE has new traffic to send to the base station or sends a PUSCH to the base station, it restarts the first timer. After the first timer expires, the UE switches from the second BWP pair to the first BWP pair and re - camps on the first BWP pair.

[0139] As Figure 5B shown for uplink data transmission.

[0140] Operations B501 - B502 are the same as operations A501 - A502.

[0141] Operation B503, the UE sends a preamble and UE - specific data to the base station on the uplink BWP of the second BWP pair.

[0142] In addition to including operation A503, in operation B503 the UE also sends an access preamble to the base station, and this access preamble can also be called a preamble. Exemplarily, the UE sends a preamble to the base station through the physical random access channel (PRACH) channel, and the base station can use the preamble to estimate the timing advance (TA) and / or channel of this UE for demodulating the PUSCH sent by the UE.

[0143] Operations B504 - B505 are the same as operations A504 - A505. Similarly Figure 5A , operation B504 is an optional item.

[0144] As Figure 5C shown for uplink data transmission.

[0145] Operations C501 - C502 are the same as operations A501 - A502.

[0146] Operation C503, the UE sends a preamble to the base station on the uplink BWP of the second BWP pair.

[0147] When triggered by the upper layer of the UE, the UE switches from the first BWP pair to the second BWP pair.

[0148] Exemplarily, the UE sends a preamble to the base station through the PRACH channel, and the base station can use the preamble to estimate the timing advance (TA) of this UE.

[0149] In operation C504, the UE receives a random access response (RAR) from the base station on the downlink BWP of the second BWP pair. The RAR can be used to indicate the TA of the UE and / or the transmission parameters of the PUSCH of the UE.

[0150] Operation C505 includes operation A503.

[0151] Alternatively to operation A503, in operation C505, the transmission parameters of the PUSCH can be those indicated by the base station for the UE through the RAR in operation C504.

[0152] Operations C506 - C507 are the same as operations A504 - A505. Similarly Figure 5A , operation C506 is an optional item.

[0153] As Figure 5D shown for downlink data transmission.

[0154] Operations D501 - D502 are the same as operations A501 - A502.

[0155] In operation D503, the UE receives specific data of the UE from the base station on the downlink BWP of the second BWP pair.

[0156] After receiving the paging message sent by the base station on the first BWP pair, the UE switches from the first BWP pair to the second BWP pair and receives the downlink data sent by the base station on the second BWP.

[0157] When the base station sends UE - specific data to the UE, it can be sent through the downlink physical layer data channel, such as through the PDSCH. The transmission parameters of the PDSCH can be pre - defined, or configured by the base station for the UE, or some types of transmission parameters are pre - defined and some types are configured by the base station for the UE. The PDSCH satisfies one or more of the following conditions: the transmission parameters of the PDSCH are UE - specific or UE - group - specific where the UE is located, the CRC of the PDSCH is scrambled by the identifier of the UE, and the information carried on the PDSCH is UE - specific or UE - group - specific where the UE is located.

[0158] When the base station configures the transmission parameters of the PDSCH for the UE, it can be configured for the UE through one of the following information: the RRC release message in operation D501, the PBCH sent to the UE on the first BWP pair or the second BWP pair, or the system message, or the paging message received by the UE on the first BWP pair sent by the base station.

[0159] Optionally, in operation D504, the UE sends an ACK / NACK for the PDSCH to the base station on the uplink BWP of the second BWP pair.

[0160] The UE may perform operation D503 and operation D504 at least once (e.g., 1 time, 2 times, or more) on the second BWP pair.

[0161] In operation D505, the UE camps on the first BWP pair again.

[0162] Exemplarily, after the UE receives the first PDSCH from the base station or sends the first ACK / NACK to the base station, it starts a second timer. When the UE receives the second PDSCH from the base station or sends the second ACK / NACK to the base station, it restarts the timer. After the timer expires, the UE switches from the second BWP pair to the first BWP pair and camps on the first BWP pair again.

[0163] As Figure 5E shown for downlink data transmission.

[0164] Operations E501 - E502 are the same as operations A501 - A502.

[0165] In operation E503, the UE sends a preamble to the base station on the uplink BWP of the second BWP pair.

[0166] When the UE receives a paging message sent by the base station on the first BWP pair, the UE switches from the first BWP pair to the second BWP pair.

[0167] Exemplarily, the UE sends a preamble to the base station through the PRACH channel. The base station can use the preamble to know that the UE is still within the coverage area of the base station, so it can send downlink data to the UE, avoiding waste of downlink resources. Among them, the identity of the UE can be identified by one or more of the sequence value, time domain resource, frequency domain resource, and code resource of the preamble, so that the base station knows which UE sent the preamble.

[0168] Operations E504 - E506 are the same as operations D503 - D505.

[0169] Optionally, when the UE performs data transmission on the second BWP pair, it can have both downlink data transmission and uplink data transmission, or it can have multiple types of uplink data transmission. For example, it can be obtained through the combination of the steps above FIG. 5A to FIG. 5E as follows Figure 5F-5L .

[0170] In the above methods, the UE can obtain the information of the second BWP pair through any one of the following methods for configuring the second BWP pair: Method 1 for configuring the second BWP pair, Method 2 for configuring the second BWP pair, or Method 3 for configuring the second BWP pair.

[0171] Configure the second BWP pair Method 1:

[0172] The second BWP pair is predefined. For example, the resource location of the second BWP pair is fixed or predefined. For example, the relative resource location between the second BWP pair and the first BWP pair is fixed or predefined.

[0173] With this method, there is no need to configure the second BWP pair through additional signaling, which can save the signaling overhead between the base station and the UE.

[0174] Configure the second BWP pair Method 2:

[0175] The second BWP pair is configured by the base station for the UE through signaling. The UE receives the configuration of the second BWP pair from the network device.

[0176] When the base station configures the second BWP pair for the UE, it can configure the information of the second BWP pair for the UE; or it can configure the information of the set of candidate second BWP pairs for the UE and indicate the index of the second BWP pair of the UE from the set of candidate second BWP pairs; or it can configure the information of the set of candidate second BWP pairs for the UE, and the UE can select the second BWP pair of the UE from the set of candidate second BWP pairs. Optionally, the UE can indicate the selected second BWP pair to the base station through signaling. Among them, the set of candidate second BWP pairs includes one or more candidate second BWP pairs, and each candidate second BWP pair corresponds to an index; configuring the information of the set of candidate second BWP pairs for the UE can also be described as: configuring the information of each candidate second BWP pair in the set of candidate second BWP pairs for the UE; the second BWP pair indicated or selected from the set of candidate second BWP pairs can also be referred to as: the active second BWP pair of the UE, or the working second BWP pair of the UE; the second BWP pair indicated or selected from the set of candidate second BWP pairs can be one second BWP pair or multiple second BWP pairs, which is not limited in the embodiments of the present application.

[0177] With this method, the base station can configure the second BWP pair according to the channel condition or service type of the UE, so that the channel quality is better and the transmission success rate is high when transmitting the information of the UE on the second BWP.

[0178] Exemplarily, when the base station configures the second BWP pair for the UE, it sends an RRC release message, a PBCH, a system message or a paging message to the UE, and the RRC release message, the PBCH, the system message or the paging message contains an indication of the information of the second BWP pair configured for the UE, or the information of the second BWP pair configured for the UE.

[0179] With this method, the base station can update the configuration of the second BWP pair according to changes in the UE's channel conditions, service type, or system load, thereby improving the success rate of UE information transmission or reducing the transmission delay of UE information.

[0180] In the embodiments of the present application, as Figure 2 shown, the base station can release the RRC connection with the UE through an RRC release message and cause the UE to transition to the RRC_IDLE state or the RRC_INACTIVE state. In this RRC release message, the base station can configure the second BWP pair for the UE.

[0181] In the method of configuring the second BWP pair 2, the PBCH, system message, or paging message can be received by the UE on the first BWP pair or received by the UE before residing on the first BWP pair. For example, the UE receives on the fourth BWP pair introduced above Figure 5A-5E This application embodiment does not make any restrictions.

[0182] Exemplarily, the base station indicates the index of the second BWP pair of the UE from the candidate second BWP pair set through an RRC release message. Among them, the information of the candidate second BWP pair set is configured for the UE by the base station through the PBCH, system message, or paging message, or is predefined.

[0183] Exemplarily, the base station indicates the index of the second BWP pair of the UE from the candidate second BWP pair set through a paging message. Among them, the information of the candidate second BWP pair set is configured for the UE by the base station through the RRC release message, PBCH, or system message, or is predefined.

[0184] Exemplarily, the base station indicates the index of the second BWP pair of the UE from the candidate second BWP pair set through the PBCH. Among them, the information of the candidate second BWP pair set is configured for the UE by the base station through the RRC release message, paging message, or system message, or is predefined.

[0185] Exemplarily, the base station indicates the index of the second BWP pair of the UE from the candidate second BWP pair set through a system message. Among them, the information of the candidate second BWP pair set is configured for the UE by the base station through the RRC release message, paging message, or PBCH, or is predefined.

[0186] Exemplarily, the base station configures the information of the candidate second BWP pair set for the UE through the RRC release message, PBCH, system message, or paging message, or predefines the information of the candidate second BWP pair set, and the UE selects the second BWP pair of the UE from the candidate second BWP pair set.

[0187] Optionally, in the embodiments of the present application, when the base station configures the information of a (candidate) second BWP pair for the UE, one or more of the following parameters of the uplink BWP of the (candidate) second BWP pair may be configured: BWP identifier (ID), time-domain resource location, frequency-domain resource location, subcarrier spacing, cyclic prefix (CP) type, configuration information of the physical uplink control channel (PUCCH) transmitted on this BWP, configuration information of the PUSCH transmitted on this BWP, and configuration information of the physical random access channel (PRACH) transmitted on this BWP.

[0188] Optionally, in the embodiments of the present application, when the base station configures the information of a (candidate) second BWP pair for the UE, one or more of the following parameters of the downlink BWP of the (candidate) second BWP pair may be configured: BWP ID, time-domain resource location, frequency-domain resource location, subcarrier spacing, CP type, configuration information of the PDCCH transmitted on this BWP, and configuration information of the PDSCH transmitted on this BWP.

[0189] Exemplarily, the signaling format of the configuration of the second BWP pair carried in the RRC release message is as follows. Among them, the cell of the RRC release message is RRCRelease-IEs.

[0190]

[0191] Exemplarily, the signaling format of the index of the second BWP pair carried in the RRC release message is as follows. Among them, the cell of the RRC release message is RRCRelease-IEs, and the information field of the index of the second BWP pair is

[0192] resumeBWPpairIndex, and the information of the candidate second BWP pair is configured in the system message SIB1-NB-IEs.

[0193]

[0194] Exemplarily, in the signaling formats of the above two examples, the cell of the configuration of the second BWP pair

[0195] BWPpairConfig is as follows.

[0196]

[0197]

[0198] Optionally, for the configuration of PDCCH, it may be indicated in the configuration that the PDCCH and the SSB, synchronization signal, or PBCH transmitted on the first BWP are quasi co-located (QCL), that is, the PDCCH and the SSB, synchronization signal, or PBCH transmitted on the first BWP share the same channel condition. Exemplarily, after the UE receives the SSB on the first BWP, it can obtain the channel estimation of the SSB, and this channel estimation can be used to demodulate the PDCCH.

[0199] Optionally, for the configuration of PDSCH, it may be indicated in the configuration that the PDSCH and the SSB, synchronization signal, or PBCH transmitted on the first BWP are QCL, that is, the PDSCH and the SSB, synchronization signal, or PBCH transmitted on the first BWP share the same channel condition. Exemplarily, after the UE receives the SSB on the first BWP, it can obtain the channel estimation of the SSB, and this channel estimation can be used to demodulate the PDSCH.

[0200] Through the method, the UE uses the SSB, etc. to obtain the channel estimation, and uses the channel estimation result to demodulate the PDCCH and / or PDSCH, so that the UE does not need to perform additional channel estimation for the PDCCH or PDSCH, reducing the implementation complexity of the UE and saving the power consumption of the UE.

[0201] Configure the second BWP pair method 3:

[0202] The second BWP pair is determined according to the identifier (ID) of the UE. Exemplarily, the ID of the UE may be the radio network temporary identifier (RNTI) of the UE or the international mobile equipment identity (IMEI) of the UE. Among them, the RNTI of the UE may be the cell radio network temporary identifier (C-RNTI) of the UE, or the semi-persistent scheduling - radio network temporary identifier (SPS-RNTI), etc., which are not limited in the embodiments of the present application. Through this method, it is not necessary to configure the second BWP pair through additional signaling, which can save the signaling overhead between the base station and the UE.

[0203] Exemplarily, the index of the second BWP pair of the UE in the set of candidate second BWP pairs of the UE is: (x * K) mod N. Herein, x represents the UE ID; K is an integer, which is predefined or configured for the UE by the base station through signaling; N represents the number of candidate second BWP pairs in the set of candidate second BWP pairs of the UE, and mod represents the modulo operation. For the introduction of the set of candidate second BWP pairs of the UE, please refer to the above-mentioned method 2 for configuring the second BWP pair, which will not be elaborated herein.

[0204] Exemplarily, the index of the second BWP pair of the UE in the set of candidate second BWP pairs of the UE is: x0 + (x mod M) * N. Herein, x represents the UE ID; x0, N, and M are integers, and x0, N, and / or M are predefined or configured for the UE by the base station through signaling. For example, x0, N, and M are all predefined; or x0, N, and M are all configured for the UE by the base station through signaling; or x0 and N are predefined, and M is configured for the UE by the base station through signaling. The embodiments of the present application do not make any limitations. Exemplarily, N represents the number of candidate second BWP pairs in the set of candidate second BWP pairs of the UE. For the introduction of the set of candidate second BWP pairs of the UE, please refer to the above-mentioned method 2 for configuring the second BWP pair, which will not be elaborated herein.

[0205] Exemplarily, the index of a specific RB (such as the starting RB, the middle RB, or the last RB, etc.) in the second BWP pair of the UE is: x0 + (x mod U) * P. Herein, x represents the UE ID; x0, P, and U are integers, and x0, P, and / or U are predefined or configured for the UE by the base station through signaling. For example, x0, P, and U are all predefined; or x0, P, and U are all configured for the UE by the base station through signaling; or x0 and P are predefined, and U is configured for the UE by the base station through signaling. The embodiments of the present application do not make any limitations. Exemplarily, P represents the number of RBs included in the maximum bandwidth supported by the UE, and the maximum bandwidth supported by the UE can also be described as the bandwidth capability of the UE. For the downlink BWP in the second BWP pair, the above formula can obtain the index of the specific RB in this downlink BWP, and P represents the number of RBs included in the maximum downlink bandwidth supported by the UE; for the uplink BWP in the second BWP pair, the above formula can obtain the index of the specific RB in this uplink BWP, and P represents the number of RBs included in the maximum uplink bandwidth supported by the UE. The maximum uplink bandwidth supported by the UE and the maximum downlink bandwidth supported by the UE can be the same or different. The embodiments of the present application do not make any limitations.

[0206] The method provided by the embodiments of the present application has been described from the perspective of the interaction between the base station and the terminal device (such as a UE). To implement the functions in the method provided by the embodiments of the present application, the base station and / or the terminal device may include a hardware structure and / or a software module, and implement the above functions in the form of a hardware structure, a software module, or a combination of a hardware structure and a software module. Whether a certain function among the above functions is executed in the form of a hardware structure, a software module, or a combination of a hardware structure and a software module depends on the specific application and design constraints of the technical solution.

[0207] Figure 6 It is a schematic structural diagram of the device 600 provided by the embodiments of the present application.

[0208] In a possible implementation, the device 600 may be a terminal device that can implement the method on the terminal device side provided by the embodiments of the present application; the device 600 may also be a device that can support the terminal device to implement this method, and the device 600 may be installed in the terminal device or used in combination with the terminal device.

[0209] In another possible implementation, the device 600 may be a base station that can implement the method on the base station side provided by the embodiments of the present application; the device 600 may also be a device that can support the base station to implement this method, and the device 600 may be installed in the base station or used in combination with the base station.

[0210] The device 600 may be a hardware structure, a software module, or a combination of a hardware structure and a software module. The device 600 may be implemented by a chip system. The device 600 includes a processing module 602 and a communication module 604. The processing module 602 may generate a signal to be sent and may use the communication module 604 to send the signal. The processing module 602 may use the communication module 604 to receive a signal and process the received signal. The processing module 602 and the communication module 604 are coupled.

[0211] The coupling in the embodiments of the present application is an indirect coupling or connection between devices, units, or modules, which may be electrical, mechanical, or other forms, and is used for information interaction between devices, units, or modules. The coupling may be a wired connection or a wireless connection.

[0212] In the embodiments of the present application, the communication module may be a circuit, a module, a bus, an interface, a transceiver, a pin, or other devices that can implement the transceiver function, and the embodiments of the present application do not make any limitations.

[0213] Figure 7 It is a schematic structural diagram of the device 700 provided by the embodiments of the present application.

[0214] In a possible implementation, the device 700 may be a terminal device capable of implementing the method on the terminal device side provided in the embodiments of the present application; the device 700 may also be a device capable of supporting the terminal device to implement the method, such as a chip system, and the device 700 may be installed in the terminal device or used in combination with the terminal device.

[0215] In another possible implementation, the device 700 may be a base station capable of implementing the method on the base station side provided in the embodiments of the present application; the device 700 may also be a device capable of supporting the base station to implement the method, such as a chip system, and the device 700 may be installed in the base station or used in combination with the base station.

[0216] As Figure 7 shown, the device 700 includes a processing system 702 for implementing the method provided in the embodiments of the present application. The processing system 702 may be a circuit, and the circuit may be implemented by a chip system. The processing system 702 includes one or more processors 722, which may be used to implement the method provided in the embodiments of the present application. When the processing system 702 includes other devices in addition to the processor 722, the processor 722 may also be used to manage the other devices included in the processing system 702. Exemplarily, the other devices may be one or more of the following memory 724, bus 726, and bus interface 728. For example, the processor 722 may be used to manage the memory 724, or the processor 722 may be used to manage the memory 724, bus 726, and bus interface 728.

[0217] The processing system 702 may further include one or more memories 724 for storing instructions and / or data. The memory 724 may be included in the processor 722. If the processing system 702 includes the memory 724, the processor 722 may be coupled to the memory 724. The processor 722 and the memory 724 may operate in cooperation. The processor 722 may execute the instructions stored in the memory 724. When the processor 722 executes the instructions stored in the memory 724, the method provided in the embodiments of the present application may be implemented. The processor 722 may also read the data stored in the memory 724. The memory 724 may also store the data obtained when the processor 722 executes the instructions.

[0218] In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components, etc. The general-purpose processor may be a microprocessor or other conventional processors, etc. The steps of the method disclosed in the embodiments of the present application may be executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0219] In the embodiments of the present application, the memory includes a volatile memory, such as a random-access memory (RAM); the memory may also include a non-volatile memory, such as a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD); the memory may further include a combination of the above types of memories; the memory may further include any other device having a storage function, such as a circuit, a device, or a software module.

[0220] The processing system 702 may further include a bus interface 728 for providing an interface between the bus 726 and other devices. Herein, the bus interface may also be referred to as a communication interface. In the embodiments of the present application, the communication interface may be a circuit, a module, a bus, an interface, a transceiver, a pin, or other device capable of implementing a transceiver function, and the embodiments of the present application do not make any limitations.

[0221] Optionally, the device 700 includes a transceiver 706 for communicating with other communication devices through a transmission medium, so that other devices in the device 700 can communicate with other communication devices. Among them, the other device may be the processing system 702. Exemplarily, other devices in the device 700 may use the transceiver 706 to communicate with other communication devices to receive and / or send corresponding information. It may also be described as that other devices in the device 700 may receive a first piece of information, where the first piece of information is received by the transceiver 706 through the transmission medium, and the first piece of information may be interacted between the transceiver 706 and other devices in the device 700 through the bus interface 728 or through the bus interface 728 and the bus 726; and / or, other devices in the device 700 may send a second piece of information, where the second piece of information is sent by the transceiver 706 through the transmission medium, and the second piece of information may be interacted between the transceiver 706 and other devices in the device 700 through the bus interface 728 or through the bus interface 728 and the bus 726.

[0222] The device 700 may further include a user interface 704, which is an interface between the user and the device 700 and may be used for information interaction between the user and the device 700. Exemplarily, the user interface 704 may be at least one of a keyboard, a mouse, a display, a speaker, a microphone, and a joystick.

[0223] The above mainly describes a device structure provided by an embodiment of the present application from the perspective of the device 700. In this device, the processing system 702 includes a processor 722, and may also include one or more of a memory 724, a bus 726, and a bus interface 728, for implementing the method provided by the embodiment of the present application. The processing system 702 is also within the protection scope of the present application.

[0224] In the device embodiment of the present application, the module division of the device is a logical function division, and there may be other division methods in actual implementation. For example, each functional module of the device may be integrated into one module, or each functional module may exist independently, or two or more functional modules may be integrated into one module.

[0225] The technical solution provided by the embodiment of the present application 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 program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present invention are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal device, or other programmable devices. 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, a computer, a server, or a data center to another website, a computer, a server, or a data center in a wired manner (such as coaxial cable, optical fiber, or digital subscriber line (DSL)) or a wireless manner (such as infrared, wireless, or microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, or a magnetic tape), an optical medium (such as a digital video disc (DVD)), or a semiconductor medium, etc.

[0226] In the embodiments of the present application, on the premise of no logical contradiction, the embodiments may refer to each other. For example, the methods and / or terms between the method embodiments may refer to each other, for example, the functions and / or terms between the device embodiments may refer to each other, and for example, the functions and / or terms between the device embodiments and the method embodiments may refer to each other.

[0227] Those skilled in the art can make various changes and modifications to the technical solutions provided by the embodiments of the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application, its embodiments and their equivalent technologies, the present application also intends to include these changes and modifications.

Claims

1. A method for communicating on a Bandwidth Part (BWP) pair, characterized in that, including: switching from a first BWP pair to a second BWP pair of a terminal device, where a downlink BWP of the first BWP pair is used for a plurality of terminal devices in a cell where the terminal device is located to receive paging messages from a network device, and where the plurality of terminal devices includes the terminal device, and a radio resource control (RRC) state of the terminal device when on the first BWP pair is a radio resource control - idle (RRC_IDLE) state or a radio resource control - inactive (RRC_INACTIVE) state; accessing the network device on the second BWP pair.

2. The method according to claim 1, wherein The method further includes: performing RRC establishment with the network device on the second BWP pair, and converting the RRC state of the terminal device from the RRC_IDLE state or the RRC_INACTIVE state to a radio resource control - connected (RRC_CONNECTED) state.

3. The method according to claim 1, characterized in that If the RRC state of the terminal device is the RRC_INACTIVE state, the method further includes: performing RRC resume with the network device on the second BWP pair, and converting the RRC state of the terminal device from the RRC_INACTIVE state to a radio resource control - connected (RRC_CONNECTED) state.

4. A method for communicating on a bandwidth part BWP pair, characterized in that, including: switching from a first BWP pair to a second BWP pair of a terminal device, where a downlink BWP of the first BWP pair is used for a plurality of terminal devices in a cell where the terminal device is located to receive paging messages from a network device, and where the plurality of terminal devices includes the terminal device, and a radio resource control (RRC) state of the terminal device when on the first BWP pair is a radio resource control - inactive (RRC_INACTIVE) state; transmitting specific information of the terminal device with the network device on the second BWP pair, where when on the second BWP pair, the RRC state of the terminal device is the RRC_INACTIVE state.

5. The method according to claim 4, characterized in that The method further includes: after transmitting the specific information of the terminal device with the network device on the second BWP pair, switching from the second BWP pair to the first BWP pair.

6. The method according to any one of claims 1-5, characterized in that, The switching from the first BWP pair to the second BWP pair includes: after receiving a paging message of the terminal device on a downlink BWP of the first BWP pair, or triggered by a higher layer of the terminal device, switching from the first BWP pair to the second BWP pair.

7. The method according to any one of claims 1-5, characterized in that, The configuration of the second BWP pair is predefined.

8. The method according to any one of claims 1-5, characterized in that, The method further includes: receiving the configuration of the second BWP pair from the network device.

9. The method according to claim 8, wherein The configuration of the second BWP pair is indicated by a radio resource control - release (RRC_release) message, a paging message, a broadcast channel, or a system message.

10. The method according to claim 8, wherein the configuration of the second BWP pair is used to indicate that a physical downlink control channel (PDCCH) transmitted on a downlink BWP of the second BWP pair and a synchronization signal block (SSB) transmitted on a downlink BWP of the first BWP pair are quasi - co - located (QCL); and / or The configuration of the second BWP pair is used to indicate that the physical downlink shared channel PUSCH transmitted on the downlink BWP of the second BWP pair and the SSB transmitted on the downlink BWP of the first BWP pair are QCL.

11. The method according to any one of claims 1-5, characterized in that The method further includes: determining the second BWP pair according to the identifier of the terminal device.

12. A method for communicating on a bandwidth part BWP pair, characterized in that, Including: Sending one or more of a broadcast message, a paging message, and system information to a plurality of terminal devices in the cell where the terminal device is located on the first BWP pair, where the plurality of terminal devices includes the terminal device, and the radio resource control RRC state of the terminal device when on the first BWP pair is the radio resource control - idle RRC_IDLE state or the radio resource control - inactive state RRC_INACTIVE state; Performing a random access procedure with the terminal device on the second BWP pair of the terminal device.

13. The method according to claim 12, characterized in that, The method further includes: Performing an RRC establishment procedure with the terminal device on the second BWP pair.

14. The method according to claim 12, wherein If the RRC state of the terminal device is the RRC_INACTIVE state, the method further includes: Performing an RRC resume procedure with the terminal device on the second BWP pair.

15. A method for communication on a bandwidth part BWP pair, characterized in that, Including: Sending one or more of a broadcast message, a paging message, and system information to a plurality of terminal devices in the cell where the terminal device is located on the first BWP pair, where the plurality of terminal devices includes the terminal device, and the radio resource control RRC state of the terminal device when on the first BWP pair is the radio resource control - inactive state RRC_INACTIVE state; Transmitting specific information of the terminal device with the terminal device on the second BWP pair of the terminal device, where when on the second BWP pair, the RRC state of the terminal device is the RRC_INACTIVE state.

16. The method according to any one of claims 12 - 15, characterized in that, The configuration of the second BWP pair is predefined.

17. The method according to any one of claims 12 - 15, characterized in that, The method further includes: Sending the configuration of the second BWP pair to the terminal device.

18. The method according to claim 17, wherein The configuration of the second BWP pair is indicated by a radio resource control - release RRC-release message, a paging message, a broadcast channel, or system information.

19. The method according to claim 17, wherein The configuration of the second BWP pair is used to indicate that the physical downlink control channel PDCCH transmitted on the downlink BWP of the second BWP pair and the synchronization signal block SSB transmitted on the downlink BWP of the first BWP pair are quasi - co - located QCL; and / or The configuration of the second BWP pair is used to indicate that the physical downlink shared channel PUSCH transmitted on the downlink BWP of the second BWP pair and the SSB transmitted on the downlink BWP of the first BWP pair are QCL.

20. The method according to any one of claims 12 - 15, characterized in that, The method further includes: determining the second BWP pair according to the identifier of the terminal device.

21. A communication device, characterized in that, Including a processor, where the processor is used to implement the method according to any one of claims 1 - 11.

22. The communication device according to claim 21, wherein, The communication device further includes a memory, and the memory is coupled to the processor.

23. A communication device, characterized in that, Including: A processing module and a communication module The processing module is configured to switch from the first BWP pair to the second BWP pair of the terminal device. The downlink BWP of the first BWP pair is used for multiple terminal devices in the cell where the terminal device is located to receive paging messages from the network device. Among them, the multiple terminal devices include the terminal device, and when on the first BWP pair, the radio resource control (RRC) state of the terminal device is the radio resource control - idle (RRC_IDLE) state or the radio resource control - inactive (RRC_INACTIVE) state; The processing module uses the communication module to access the network device on the second BWP pair.

24. A communication device, characterized in that, Comprising: A processor and a communication interface, The processor is configured to switch from the first BWP pair to the second BWP pair of the terminal device. The downlink BWP of the first BWP pair is used for multiple terminal devices in the cell where the terminal device is located to receive paging messages from the network device. Among them, the multiple terminal devices include the terminal device, and when on the first BWP pair, the radio resource control (RRC) state of the terminal device is the radio resource control - idle (RRC_IDLE) state or the radio resource control - inactive (RRC_INACTIVE) state; The processor uses the communication interface to access the network device on the second BWP pair.

25. The communication device according to claim 24, characterized in that, The processor is further configured to: Perform RRC establishment with the network device on the second BWP pair, and the RRC state of the terminal device is converted from the RRC_IDLE state or the RRC_INACTIVE state to the radio resource control - connected (RRC - CONNECTED) state.

26. The communication device according to claim 24, characterized in that, If the RRC state of the terminal device is the RRC_INACTIVE state, the processor is further configured to: Perform RRC resume with the network device on the second BWP pair, and the RRC state of the terminal device is converted from the RRC_INACTIVE state to the radio resource control - connected (RRC - CONNECTED) state.

27. A communication device, characterized in that, Comprising: A processor and a communication interface, The processor is configured to switch from the first BWP pair to the second BWP pair of the terminal device. The downlink BWP of the first BWP pair is used for multiple terminal devices in the cell where the terminal device is located to receive paging messages from the network device. Among them, the multiple terminal devices include the terminal device, and when on the first BWP pair, the radio resource control (RRC) state of the terminal device is the radio resource control - inactive (RRC_INACTIVE) state; The processor uses the communication interface to transmit specific information of the terminal device to the network device on the second BWP pair. Among them, when on the second BWP pair, the RRC state of the terminal device is the RRC_INACTIVE state.

28. The communication device according to claim 27, wherein The processor is further configured to: After transmitting the specific information of the terminal device to the network device on the second BWP pair, switch from the second BWP pair to the first BWP pair.

29. The communication device according to any one of claims 24-28, characterized in that, The switching from the first BWP pair to the second BWP pair includes: After receiving the paging message of the terminal device on the downlink BWP of the first BWP pair, or triggered by the higher layer of the terminal device, switch from the first BWP pair to the second BWP pair.

30. The communication device according to any one of claims 24-28, characterized in that, The configuration of the second BWP pair is predefined.

31. The communication device according to any one of claims 24-28, characterized in that, The processor also uses the communication interface: Receive the configuration of the second BWP pair from the network device.

32. The communication device according to claim 31, characterized in that, The configuration of the second BWP pair is indicated by a Radio Resource Control - Release (RRC-release) message, a paging message, a broadcast channel, or a system message.

33. The communication device according to claim 31, wherein the configuration of the second BWP pair is used to indicate that the Physical Downlink Control Channel (PDCCH) transmitted on the downlink BWP of the second BWP pair and the Synchronization Signal Block (SSB) transmitted on the downlink BWP of the first BWP pair are Quasi-Co-Located (QCL); and / or the configuration of the second BWP pair is used to indicate that the Physical Uplink Shared Channel (PUSCH) transmitted on the downlink BWP of the second BWP pair and the SSB transmitted on the downlink BWP of the first BWP pair are QCL.

34. The communication device according to any one of claims 24-28, characterized in that, The processor is further configured to: determine the second BWP pair according to the identifier of the terminal device.

35. A communication device, characterized in that, Comprising a processor, the processor is used to implement the method according to any one of claims 12 - 20.

36. The communication device according to claim 35, wherein The communication device further comprises a memory, and the memory is coupled to the processor.

37. A communication device, characterized in that, Comprising: A processing module and a communication module, the processing module uses the communication module: Send one or more of a broadcast message, a paging message, and system information to a plurality of terminal devices in the cell where the terminal device is located on the first BWP, wherein the plurality of terminal devices include the terminal device, and the Radio Resource Control (RRC) state of the terminal device is in the Radio Resource Control _Idle (RRC_IDLE) state or the Radio Resource Control _Inactive (RRC_INACTIVE) state when on the first BWP; Perform a random access procedure with the terminal device on the second BWP of the terminal device.

38. A communication device, characterized in that, Comprising: A processor and a communication interface, the processor uses the communication interface: Send one or more of a broadcast message, a paging message, and system information to a plurality of terminal devices in the cell where the terminal device is located on the first BWP, wherein the plurality of terminal devices include the terminal device, and the Radio Resource Control (RRC) state of the terminal device is in the Radio Resource Control _Idle (RRC_IDLE) state or the Radio Resource Control _Inactive (RRC_INACTIVE) state when on the first BWP; Perform a random access procedure with the terminal device on the second BWP of the terminal device.

39. The communication device according to claim 38, wherein, The processor also uses the communication interface: Perform an RRC establishment procedure with the terminal device on the second BWP.

40. The communication device according to claim 38, wherein If the RRC state of the terminal device is the RRC_INACTIVE state, the processor also uses the communication interface: Perform an RRC resume procedure with the terminal device on the second BWP.

41. A communication device, characterized in that, Comprising: A processor and a communication interface, the processor uses the communication interface: Send one or more of a broadcast message, a paging message, and system information to a plurality of terminal devices in the cell where the terminal device is located on a first BWP, where the plurality of terminal devices includes the terminal device, and the radio resource control (RRC) state of the terminal device is the radio resource control - inactive state (RRC_INACTIVE state) when on the first BWP; Transmit specific information of the terminal device to the terminal device on a second BWP of the terminal device, where the RRC state of the terminal device is the RRC_INACTIVE state when on the second BWP.

42. The communication device according to any one of claims 38-41, characterized in that, The configuration of the second BWP is predefined.

43. The communication device according to any one of claims 38-41, characterized in that, The processor also uses the communication interface: Send the configuration of the second BWP to the terminal device.

44. The communication device according to claim 43, wherein, The configuration of the second BWP is indicated by a radio resource control - release (RRC-release) message, a paging message, a broadcast channel, or system information.

45. The communication device according to claim 43, wherein The configuration of the second BWP is used to indicate that the physical downlink control channel (PDCCH) transmitted on the downlink BWP of the second BWP and the synchronization signal block (SSB) transmitted on the downlink BWP of the first BWP are quasi - co - located (QCL); and / or The configuration of the second BWP is used to indicate that the physical downlink shared channel (PUSCH) transmitted on the downlink BWP of the second BWP and the SSB transmitted on the downlink BWP of the first BWP are QCL.

46. The communication device according to any one of claims 38-41, characterized in that, The processor also uses the communication interface: Determine the second BWP according to the identifier of the terminal device.

47. A computer - readable storage medium, including instructions, which when running on a computer, cause the computer to execute the method according to any one of claims 1 to 20.

48. A computer program product, including instructions, which when running on a computer, cause the computer to execute the method according to any one of claims 1 to 20.

49. A communication system, including the communication device according to any one of claims 21 to 34, and the communication device according to any one of claims 35 to 46.

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