Method for switching working bandwidth part, terminal device and network device

Abstract

A BWP switching method, a terminal device and a network device, wherein the method comprises: a terminal device listens to a physical downlink control channel (PDCCH) indicating BWP switching; parsing a BWP switching medium access control (MAC) control element (CE) carried in a physical downlink shared channel (PDSCH) indicated by the PDCCH; and determining whether to perform BWP switching according to the parsing result. The method can save system overhead and reduce the phenomenon of BWP switching failure caused by system resource congestion.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication, and more particularly, to a method for switching a bandwidth part (BWP), a terminal device, and a network device. BACKGROUND

[0002] A concept of a BWP (Bandwidth Part) is introduced in the current 5G NR, that is, a part of continuous bandwidth is divided from a whole large bandwidth carrier to give a terminal for data transmission and reception. The terminal only needs to perform relevant operations in the bandwidth configured by the network, thereby achieving the effect of terminal energy saving.

[0003] For each serving cell of the terminal, the network can configure one or more BWPs for the terminal on the serving cell, and the maximum number of currently configurable BWPs is 4. At each time, the terminal can only have 1 activated DL (DownLink) BWP and 1 activated UL (UpLink) BWP on the serving cell, and the terminal can only perform data transmission and reception on the activated BWP. Considering the diversity of terminal services and the difference between different service characteristics, the terminal may have a demand for adjusting the BWP.

[0004] In some scenarios, there may be a large number of UEs (User Equipment) that have a demand for switching the BWP. The existing method of sending a BWP switching indication for each UE separately may have a problem of excessive system overhead, and in a serious case, some UEs may not be able to switch the BWP in time due to system resource congestion, thereby causing beam failure and affecting user experience. SUMMARY

[0005] Embodiments of the present application provide a method for switching a BWP, a terminal device, and a network device, which can reduce the system overhead of BWP switching and reduce the phenomenon of BWP switching failure caused by system resource congestion.

[0006] Embodiments of the present application provide a method for switching a BWP, a terminal device, and a network device, which can reduce the system overhead of BWP switching and reduce the phenomenon of BWP switching failure caused by system resource congestion.

[0007] The terminal device listens to a PDCCH (Physical Downlink Control Channel) indicating BWP switching.

[0008] The terminal device parses a BWP switching MAC (Medium Access Control) CE (Control Element) carried in a PDSCH (Physical Downlink Share Channel) indicated by the PDCCH.

[0009] The terminal device determines whether to perform BWP switching according to the parsing result.

[0010] The embodiment of the present application also provides a BWP switching method, comprising the following steps:

[0011] The network device sends a PDCCH indicating BWP switching;

[0012] The network device carries a BWP switching MAC CE in a PDSCH indicated by the PDCCH, and the BWP switching MAC CE is used to indicate at least one terminal device performing BWP switching.

[0013] The embodiment of the present application also provides a terminal device, comprising:

[0014] A listening module is configured to listen to a PDCCH indicating BWP switching;

[0015] A parsing module is configured to parse a BWP switching MAC CE carried in a PDSCH indicated by the PDCCH;

[0016] A judging module is configured to determine whether to perform BWP switching according to a parsing result.

[0017] The embodiment of the present application also provides a network device, comprising:

[0018] A first sending module is configured to send a PDCCH indicating BWP switching;

[0019] A switching indication module is configured to carry a BWP switching MAC CE in a PDSCH indicated by the PDCCH, and the BWP switching MAC CE is used to indicate at least one terminal device performing BWP switching.

[0020] The embodiment of the present application also provides a terminal device, comprising a processor and a memory, wherein the memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory, and perform the BWP switching method of any of the above aspects.

[0021] The embodiment of the present application also provides a network device, comprising a processor and a memory, wherein the memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory, and perform the BWP switching method of any of the above aspects.

[0022] The embodiment of the present application also provides a chip, comprising a processor, configured to call and run a computer program from a memory, so that a device installed with the chip performs the BWP switching method of any of the above aspects.

[0023] The embodiment of the present application also provides a computer readable storage medium for storing a computer program, and the computer program causes a computer to execute the BWP switching method of any one of the above aspects.

[0024] The embodiment of the present application also provides a computer program product comprising computer program instructions, and the computer program instructions cause a computer to execute the BWP switching method of any one of the above aspects.

[0025] The embodiment of the present application also provides a computer program, and the computer program causes a computer to execute the BWP switching method of any one of the above aspects.

[0026] The BWP switching method provided in the embodiment of the present application is used, the terminal device listens to the PDCCH indicating the BWP switching, and analyzes the BWP switching MAC CE carried in the PDSCH indicated by the PDCCH; and whether the BWP switching is executed is determined according to the analysis result. It can be seen that the method provided in the embodiment of the present application does not need to send the PDCCH indicating the BWP switching for each terminal device, and therefore the system overhead can be saved, and the BWP switching failure phenomenon caused by the system resource congestion can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a schematic diagram of an application scenario of the embodiment of the present application.

[0028] Figure 2 FIG. 2 is a BWP configuration schematic diagram.

[0029] Figure 3 FIG. 3 is an implementation flowchart of the BWP switching method 300 according to the embodiment of the present application.

[0030] Figure 4 FIG. 4 is a structure schematic diagram of the BWP switching MAC CE according to the embodiment of the present application.

[0031] Figure 5 FIG. 5 is a BWP switching schematic diagram according to the first embodiment of the present application.

[0032] Figure 6 FIG. 6 is a BWP switching schematic diagram according to the second embodiment of the present application.

[0033] Figure 7 FIG. 7 is a BWP switching schematic diagram according to the third embodiment of the present application.

[0034] Figure 8 FIG. 8 is an implementation flowchart of the BWP switching method 800 according to the embodiment of the present application.

[0035] Figure 9 FIG. 9 is a structure schematic diagram of the terminal device 900 according to the embodiment of the present application.

[0036] Figure 10 FIG. 1 is a schematic structural diagram of a terminal device 1000 according to an embodiment of the present application.

[0037] Figure 11 FIG. 2 is a schematic structural diagram of a network device 1100 according to an embodiment of the present application.

[0038] Figure 12 FIG. 3 is a schematic structural diagram of a network device 1200 according to an embodiment of the present application.

[0039] Figure 13 FIG. 4 is a schematic structural diagram of a communication device 1300 according to an embodiment of the present application.

[0040] Figure 14 FIG. 5 is a schematic structural diagram of a chip 1400 according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. The objects described by "first", "second" can be the same or different.

[0043] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, an Advanced long term evolution (LTE-A) system, a New Radio (NR) system, an evolved system of the NR system, an LTE-based access to unlicensed spectrum (LTE-U) system, an NR-based access to unlicensed spectrum (NR-U) system, a Universal Mobile Telecommunication System (UMTS), a Wireless Local Area Networks (WLAN), a Wireless Fidelity (WiFi), a 5th-Generation (5G) system, or other communication systems.

[0044] Generally, a conventional communication system supports a limited number of connections, and is easy to implement. However, with the development of communication technology, a mobile communication system will not only support conventional communication, but also support, for example, Device to Device (D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), and Vehicle to Vehicle (V2V) communication, and the like. The embodiments of the present application can also be applied to these communication systems.

[0045] Optionally, the communication system in the embodiments of the present application can be applied to a Carrier Aggregation (CA) scenario, can also be applied to a Dual Connectivity (DC) scenario, and can also be applied to a Standalone (SA) network deployment scenario.

[0046] The embodiments of the present application are not limited to the application of the spectrum. For example, the embodiments of the present application can be applied to licensed spectrum, and can also be applied to unlicensed spectrum.

[0047] The embodiments of the present application describe various embodiments in combination with network devices and terminal devices, wherein the terminal device can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device, etc. The terminal device can be a station (STA) in a WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, and a next-generation communication system, such as a terminal device in an NR network or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0048] By way of example and not limitation, in the embodiments of the present application, the terminal device can also be a wearable device. The wearable device can also be referred to as a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing and shoes, etc. The wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. The wearable device is not only a hardware device, but also a powerful function realized through software support and data interaction, cloud interaction. The general wearable smart device includes a full function, large size, and can realize complete or partial functions without relying on a smart phone, such as a smart watch or smart glasses, etc., and only focuses on a certain application function, and needs to cooperate with other devices such as a smart phone, such as various smart wristbands, smart jewelry, etc. for monitoring body signs.

[0049] The network device can be a device for communicating with the mobile device, can be an access point (AP) in a WLAN, a base transceiver station (BTS) in GSM or CDMA, can also be a base station (NodeB, NB) in WCDMA, can further be an evolved base station (eNB or eNodeB) in LTE, or a relay station or an access point, or a vehicle-mounted device, a wearable device, and a network device in an NR network (gNB) or a network device in a future evolved PLMN network, etc.

[0050] In the embodiments of the present application, the network device serves a cell, and the terminal device communicates with the network device by using a transmission resource (for example, a frequency domain resource, or a spectrum resource) used by the cell. The cell can be a cell corresponding to the network device (for example, a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell. The small cell can include a metro cell, a micro cell, a pico cell, a femto cell, etc., and the small cell has the characteristics of small coverage and low transmit power, and is suitable for providing a high-rate data transmission service.

[0051] Figure 1 Exemplarily, one network device 110 and two terminal devices 120 are shown. Optionally, the wireless communication system 100 can include a plurality of network devices 110, and each network device 110 can include other numbers of terminal devices 120 within the coverage range of the network device 110, and the embodiments of the present application do not limit this. The embodiments of the present application can be applied to one terminal device 120 and one network device 110, or one terminal device 120 and another terminal device 120.

[0052] Optionally, the wireless communication system 100 can further include a mobility management entity (MME), an access and mobility management function (AMF), and other network entities, and the embodiments of the present application do not limit this.

[0053] It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or", herein, is merely descriptive of the associated relationship of associated objects, indicating that there can be three relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0054] In order to provide greater data transmission rate and improve user experience, 5G NR further increases the system bandwidth on the basis of 4G. In 5G NR, for the frequency band below 6 GHz, the maximum bandwidth supported by a single carrier is 100 MHz; for the frequency band above 6 GHz, the maximum bandwidth supported by a single carrier is 400 MHz. For a large carrier bandwidth, such as 100 HMz, the bandwidth used by the terminal is often very limited. If the terminal always detects and measures on the entire bandwidth, it will bring great challenges to the terminal power consumption, which is not conducive to terminal power saving. Therefore, the concept of BWP is introduced in 5G NR, that is, a part of continuous bandwidth is divided in the entire large bandwidth carrier for the terminal to perform data transmission and reception. The terminal only needs to perform related operations in the bandwidth configured by the network, thereby achieving the effect of terminal energy saving.

[0055] Based on the 5G NR standard, for each serving cell of the terminal, the network radio resource control (RRC) can configure one or more BWPs for the terminal on this serving cell, and the maximum number of configurable BWPs is 4. At each time, the terminal can only have 1 activated DL BWP and 1 activated UL BWP on this serving cell, and the terminal can only perform data transmission and reception on the activated BWP. Considering the diversity of terminal services and the difference between different service characteristics, the terminal may have the need to adjust the BWP. For example, when the terminal traffic is large and hopes to obtain high-speed service, a large bandwidth BWP is needed for data transmission for this terminal. When the terminal traffic is small, a small bandwidth BWP can be used for data transmission for this terminal. The activated BWP of the terminal on this serving cell can be changed by BWP switching.

[0056] There are four kinds of BWP switching methods supported in the current standard: 1) PDCCH-based BWP switching; 2) RRC (re) configured BWP switching; 3) timer timeout-based BWP switching; 4) BWP switching caused by random access initialization. Among them, the PDCCH-based BWP switching is a network-controlled BWP switching. The network informs the terminal of the target BWP for switching by sending a PDCCH to the terminal.

[0057] In the current Non-Terrestrial Network (NTN) standardization process, it is discussed to reduce the co-frequency interference between adjacent beams by frequency multiplexing for different satellite beams. One way is to configure different BWP to different satellite beams, and to realize beam switching by BWP switching. In this way, all UEs under a satellite beam use the same activated BWP, and when a UE moves from one satellite beam to another, BWP switching needs to be performed, as shown in Figure 2 Considering the currently supported BWP switching mode in the standard, the BWP switching in this networking mode should use the PDCCH indication-based BWP switching mode.

[0058] Communication satellites are divided into Low-Earth Orbit (LEO) satellites, Medium-Earth Orbit (MEO) satellites, Geostationary Earth Orbit (GEO) satellites, High Elliptical Orbit (HEO) satellites, etc. according to the orbital height. In the non-GEO scenario, the satellite moves at high speed relative to the UE, which may cause frequent BWP switching, and there may be a large number of UE BWP switching requirements in a short period of time. The existing method of sending PDCCH indication BWP switching for each UE separately may have the problem of excessive PDCCH overhead, and in serious cases, some UEs may not be able to switch BWP in time due to PDCCH resource congestion, resulting in beam failure and affecting user experience. Therefore, how to alleviate the PDCCH overhead caused by the demand for a large number of UEs to switch BWP in the non-GEO scenario is a problem that needs to be studied.

[0059] The embodiment of the present application provides a BWP switching method, Figure 3 is an implementation flowchart of a BWP switching method 300 according to the embodiment of the present application. The method can be optionally applied to the system as shown in the figure, but is not limited thereto. The method includes at least part of the following contents. Figure 1

[0060] S310: The terminal device listens to the PDCCH indicating BWP switching;

[0061] S320: Analyze the BWP switching MAC CE carried in the PDSCH indicated by the PDCCH;

[0062] S330: Determine whether to perform BWP switching according to the analysis result.

[0063] ​In some embodiments, the S330 comprises: if the identifier of the terminal device is included in the BWP switching MAC CE, determining to perform the BWP switching.

[0064] Optionally, the identifier of the terminal device is a cell radio network temporary identifier (C-RNTI).

[0065] In some embodiments, an identifier of a target BWP of the BWP switching is included in downlink control information (DCI) of the PDCCH indicating the BWP switching, and the identifier of the target BWP can be used to determine that the terminal device switches to the target BWP to perform the BWP switching.

[0066] Optionally, the identifier of the target BWP comprises an identifier of a target downlink BWP.

[0067] Optionally, if it is determined to perform the BWP switching, the terminal device switches a downlink BWP to the target downlink BWP.

[0068] In some embodiments, the terminal device stores a BWP configuration parameter, and the BWP configuration parameter comprises a correspondence between an uplink BWP and a downlink BWP.

[0069] If it is determined to perform the BWP switching, the terminal device determines a target uplink BWP corresponding to a target downlink BWP according to the correspondence, and switches an uplink BWP of the terminal device to the target uplink BWP.

[0070] Optionally, the method further comprises: receiving, by the terminal device, a broadcast message or RRC signaling, and the broadcast message or the RRC signaling comprises the BWP configuration parameter.

[0071] In some embodiments, the BWP configuration parameter further comprises an uplink BWP list and / or a downlink BWP list, and wherein:

[0072] Each uplink BWP in the uplink BWP list does not overlap in the frequency domain.

[0073] Each downlink BWP in the downlink BWP list does not overlap in the frequency domain.

[0074] The correspondence can be in a display configuration manner, for example, for each uplink BWP, an associated downlink BWP is configured.

[0075] Alternatively, the above-mentioned correspondence can be in the form of implicit association, for example, the corresponding uplink BWP and downlink BWP in the above-mentioned correspondence have the same identifier.

[0076] In some embodiments, the DCI of the PDCCH indicating the BWP switching includes terminal device group information of the terminal device that needs to perform the BWP switching.

[0077] After the terminal device monitors the PDCCH indicating the BWP switching, the terminal device detects whether the terminal device group information of the terminal device that needs to perform the BWP switching in the DCI of the PDCCH contains the information of the terminal device group that the terminal device belongs to; if yes, the terminal device continues to parse the BWP switching MAC CE transmitted in the PDSCH indicated by the PDCCH; if no, the terminal device determines not to perform the BWP switching.

[0078] In this way, the terminal device can only receive the PDSCH when the terminal device that needs to perform the BWP switching is contained in the group that the terminal device belongs to, thereby reducing the operation steps of the terminal device and further achieving the energy saving effect.

[0079] The terminal device group included in the DCI of the PDCCH indicating the BWP switching can adopt the following two forms:

[0080] Firstly, the identifier (or UE group ID) of the terminal device group that needs to perform the BWP switching is explicitly indicated. In this way, the UE determines whether there is a UE that needs to perform the BWP switching in the UE group that the UE belongs to by detecting whether the UE group ID indicated in the DCI contains the UE group ID that the UE belongs to.

[0081] Secondly, the DCI of the PDCCH indicating the BWP switching includes bit information corresponding to each terminal device group, and each bit information is used to indicate whether the corresponding terminal device group needs to perform the BWP switching. For example, the bitmap is used to indicate whether the UE in each UE group needs to perform the BWP switching. For example, there are M bits in the DCI of the PDCCH for the BWP switching indication of UE groups 1, …, M. For each UE group, if the BWP switching indication bit corresponding to the UE group is set to 1, it means that there is a UE that needs to perform the BWP switching in the UE group that the UE belongs to; if the BWP switching indication bit corresponding to the UE group is set to 0, it means that there is no UE that needs to perform the BWP switching in the UE group that the UE belongs to.

[0082] Optionally, the above-mentioned method further includes that the terminal device receives RRC signaling containing the information of the terminal device group that the terminal device belongs to.

[0083] In some embodiments, the PDCCH indicating the BWP switching is scrambled by a first radio network temporary identity (RNTI).

[0084] The terminal device monitors the PDCCH indicating the BWP switching using the first RNTI.

[0085] Optionally, the terminal device determines the first RNTI through a system message configuration and / or a predefined manner.

[0086] In some embodiments, all terminal devices monitor the PDCCH indicating the BWP switching using the same first RNTI.

[0087] In some other embodiments, terminal devices in the same terminal device group monitor the PDCCH indicating the BWP switching using the same first RNTI, and terminal devices in different terminal device groups monitor the PDCCH indicating the BWP switching using different first RNTIs.

[0088] Optionally, the terminal device monitors the first PDCCH indicating the BWP switching in a first PDCCH search space.

[0089] The first PDCCH search space can be a common PDCCH search space.

[0090] In some embodiments, the method further comprises: receiving, by the terminal device, a broadcast message including configuration information of the first PDCCH search space.

[0091] Optionally, the PDSCH includes at least one BWP switching MAC CE.

[0092] Optionally, the payload of the BWP switching MAC CE includes at most N C-RNTIs, where N is the number of terminal devices that need to perform BWP switching.

[0093] Accordingly, determining whether to perform BWP switching according to the parsing result includes:

[0094] If the payload of the at least one BWP switching MAC CE included in the PDSCH includes the C-RNTI of the terminal device, it is determined that the terminal device performs BWP switching.

[0095] If the payload of any one of the BWP switching MAC CEs included in the PDSCH does not include the C-RNTI of the terminal device, it is determined that the terminal device does not perform BWP switching.

[0096] In some embodiments, the method further comprises:

[0097] The terminal device sends an acknowledgement (ACK) message on the target uplink BWP after the BWP switching.

[0098] The application will be described in detail below with reference to specific embodiments in conjunction with the accompanying drawings.

[0099] Embodiment One:

[0100] In this embodiment, the network configures a common PDCCH search space through a broadcast message, which is used by all UEs to monitor the PDCCH indicating BWP switching. After the UE receives the PDCCH indicating BWP switching, the UE determines whether to perform BWP switching according to the parsing result of the payload of the BWP switching MAC CE carried in the PDSCH transmission indicated by the PDCCH. The BWP switching MAC CE can be used to indicate multiple UEs to perform BWP switching.

[0101] The specific implementation process is as follows:

[0102] Step 1: The UE receives network configuration information, configures BWP related parameters, and PDCCH search space related parameters. Specifically:

[0103] a) BWP configuration parameters, including UL BWP list and DL BWP list, the UL BWP list and the downlink DL BWP list have the following characteristics:

[0104] Each UL BWP in the UL BWP list does not overlap in the frequency domain;

[0105] Each DL BWP in the DL BWP list does not overlap in the frequency domain;

[0106] Determine the one-to-one correspondence between each UL BWP and DL BWP. The association relationship between the UL BWP and the DL BWP is used when the UE performs BWP switching in one link direction (such as switching to a first target BWP) to switch the BWP in the other link direction to the BWP associated with the first target BWP. The method for determining the association relationship between the UL BWP and the DL BWP can be:

[0107] Method 1: Network explicit configuration. For example, for each UL BWP, configure a DL BWP ID associated with it.

[0108] Method 2: Implicit association method. For example, the UL BWP and the DL BWP corresponding to the same BWP ID are associated together.

[0109] The BWP configuration parameters can be carried by a broadcast message or UE-specific RRC signaling.

[0110] b) PDCCH search space configuration, including a first PDCCH search space configuration, the first PDCCH search space being a common PDCCH search space for UEs to monitor PDCCH indicating BWP switching. The first PDCCH search space is configured by a system broadcast message.

[0111] c) Determine a first RNTI, all UEs use the first RNTI to monitor PDCCH indicating BWP switching on the first PDCCH search space. The first RNTI can be configured by the network through a system message or determined in a predefined manner.

[0112] Step 2: The UE monitors the PDCCH scrambled by the first RNTI on the first PDCCH search space configured by the network based on the network configuration. If the UE detects the PDCCH scrambled by the first RNTI on the first PDCCH search space, it further performs step 3. In the PDCCH DCI, the target DL BWP ID indicating BWP switching and the PDSCH resource allocation information are indicated.

[0113] Step 3: The UE receives the PDSCH on the current DL BWP based on the received PDCCH indication, and the PDSCH contains at least one BWP switching MAC CE. The payload of the BWP switching MAC CE contains at most N C-RNTIs, where the N C-RNTIs are the C-RNTIs of the UEs indicated by the network to perform BWP switching. Figure 4 is a structural diagram of the BWP switching MAC CE according to the embodiments of the present application, as Figure 4 shown, at most N C-RNTIs are contained in the BWP switching MAC CE.

[0114] The UE determines whether it needs to perform BWP switching by further analyzing the BWP switching MAC CE contained in the PDSCH, specifically:

[0115] a) If the C-RNTI of the UE is contained in at least one BWP switching MAC CE contained in the PDSCH, the UE performs BWP switching and continues to perform step 4.

[0116] b) If the C-RNTI of the UE is not contained in any BWP switching MAC CE contained in the PDSCH, the UE does not perform BWP switching.

[0117] Step 4: For the UE determined to perform BWP switching, the UE switches the DL BWP to the target DL BWP, and switches the UL BWP to the target UL BWP associated with the target DL BWP.

[0118] Step 5: After the UE completes the BWP switching, the UE sends an ACK to the network on the target UL BWP.

[0119] A BWP switching schematic diagram of the embodiment is shown in Figure 5 Figure 5 The basic assumption of the case shown in the above table is: it is assumed that there are currently 8 UEs working on BWP1, which are UE1, UE2, …, UE8 respectively, and the 8 UEs all receive the PDCCH indicating BWP switching using the same first RNTI. In the initial case, the downlink BWP where the 8 UEs are located is DL BWP1, and the uplink BWP where the 8 UEs are located is UL BWP1. The network side scrambles the PDCCH indicating BWP switching using the first RNTI, and the PDCCH indicates that the downlink BWP is switched to DL BWP2. The 8 UEs all listen to the PDCCH indicating BWP switching on DL BWP1, and based on the indication of the PDCCH, the 8 UEs all receive the PDCSH on DL BWP1. The BWP switching MAC CE contained in the PDCSH contains the identities of UE1, UE2, UE3 and UE4, i.e. indicates that UE1, UE2, UE3 and UE4 perform BWP switching. According to the indication of the PDCSH, UE1, UE2, UE3 and UE4 switch the downlink BWP to DL BWP2; and UE1, UE2, UE3 and UE4 switch the uplink BWP to UL BWP2 corresponding to DL BWP2, and send an ACK message on UL BWP2.

[0120] Embodiment two:

[0121] In this embodiment, the network configures a common PDCCH search space through a broadcast message, and the common PDCCH search space is used by all UEs to listen to the PDCCH indicating BWP switching. At the same time, the network configures UE grouping information. When a UE receives the PDCCH indicating BWP switching, and the UE grouping indicated in the PDCCH DCI that needs to perform BWP switching contains the grouping where the UE is located, the UE determines whether to perform BWP switching by further analyzing the payload of the BWP switching MAC CE carried in the PDSCH transmission indicated by the PDCCH. The BWP switching MAC CE can be used to indicate multiple UEs to perform BWP switching.

[0122] The specific implementation process is as follows:

[0123] ​Step 1: UE receives network configuration information, configures BWP related parameters, PDCCH search space related parameters, UE grouping information. Specifically:

[0124] a) BWP configuration parameters, including UL BWP list and DL BWP list, UL BWP list and downlink DL BWP list have the following characteristics:

[0125] Each UL BWP in the UL BWP list does not overlap in the frequency domain;

[0126] Each DL BWP in the DL BWP list does not overlap in the frequency domain;

[0127] Determine the one-to-one correspondence between each UL BWP and DL BWP. The association between UL BWP and DL BWP is used when UE performs BWP switching in one link direction (such as switching to a first target BWP) to simultaneously switch the BWP in the other link direction to the BWP associated with the first target BWP. The method of determining the association between UL BWP and DL BWP can be:

[0128] Method 1: Network explicit configuration. For example, for each UL BWP, configure a DL BWP ID associated with it.

[0129] Method 2: Implicit association. For example, associate UL BWP and DL BWP with the same BWP ID.

[0130] BWP configuration parameters can be carried by broadcast message or UE dedicated RRC signaling.

[0131] b) PDCCH search space configuration, including first PDCCH search space configuration, first PDCCH search space is common PDCCH search space, used for UE to monitor PDCCH indicating BWP switching. The first PDCCH search space is configured by system broadcast message.

[0132] c) Determine a first RNTI, all UEs use the first RNTI to monitor the PDCCH indicating BWP switching on the first PDCCH search space. The first RNTI can be configured by the network through the system message or determined in a predefined manner.

[0133] d) UE grouping information, using RRC signaling to indicate the UE group that the UE belongs to. When configuring UE grouping information, the network can configure UEs in a corresponding feature area as the same UE group based on UE location.

[0134] Step 2: UE monitors PDCCH scrambled with the first RNTI on the first PDCCH search space configured by the network based on the network configuration. If the UE detects PDCCH scrambled with the first RNTI on the first PDCCH search space, the PDCCH DCI indicates the target DL BWP ID for BWP switching, the UE group ID that needs to switch to the target DL BWP ID, and the PDSCH resource allocation information. The specific way of indicating the UE group ID that needs to switch to the target DL BWP ID in the DCI format can be:

[0135] Method 1: Explicitly indicate the UE group ID that needs to perform BWP switching. In this way, the UE determines whether there is a UE that needs to perform BWP switching in the UE group to which the UE belongs by detecting whether the UE group ID indicated in the DCI contains the UE group ID to which the UE belongs.

[0136] Method 2: Use bitmap to indicate whether the UE in each UE group needs to perform BWP switching. For example, there are M bits in the DCI of the PDCCH for BWP switching indication of UE group 1, …, UE group M. For each UE group, if the BWP switching indication bit corresponding to the UE group is set to 1, it means that there is a UE that needs to perform BWP switching in the UE group to which the UE belongs; if the BWP switching indication bit corresponding to the UE group is set to 0, it means that there is no UE that needs to perform BWP switching in the UE group to which the UE belongs.

[0137] The UE determines based on the above methods:

[0138] a) If there is a UE that needs to perform BWP switching in the UE group to which the UE belongs, the UE continues to receive PDSCH and performs step 3;

[0139] b) If there is no UE that needs to perform BWP switching in the UE group to which the UE belongs, the UE does not perform BWP switching.

[0140] Step 3: The UE receives PDSCH on the current DL BWP based on the received PDCCH indication, and the PDSCH contains at least one BWP switching MAC CE. The payload of the BWP switching MAC CE contains at most N C-RNTIs, where the N C-RNTIs are the C-RNTIs corresponding to the UEs that need to perform BWP switching indicated by the network. The UE determines whether it needs to perform BWP switching by further parsing the BWP switching MAC CE contained in the PDSCH, specifically:

[0141] a) If the C-RNTI of the UE is included in at least one BWP switching MAC CE included in the PDSCH, the UE performs BWP switching and proceeds to step 4.

[0142] b) If the C-RNTI of the UE is not included in any one BWP switching MAC CE included in the PDSCH, the UE does not perform BWP switching.

[0143] Step 4: For the UE determined to perform BWP switching, the UE switches the DL BWP to the target DL BWP and switches the UL BWP to the target UL BWP associated with the target DL BWP.

[0144] Step 5: After the UE completes BWP switching, the UE sends ACK to the network on the target UL BWP.

[0145] A BWP switching schematic diagram of the embodiment is shown in Figure 6 , and Figure 6 The basic assumption of the case shown in the figure is: it is assumed that there are currently 8 UEs working on BWP1, which are UE1, UE2, …, UE8 respectively, and the 8 UEs all use the same first RNTI to receive the PDCCH indicating BWP switching. Among them, UE1 and UE2 correspond to UE group 1, UE3 and UE4 correspond to UE group 2, UE5 and UE6 correspond to UE group 3, and UE7 and UE8 correspond to UE group 4. In the initial case, the downlink BWP where the 8 UEs are located is DL BWP1, and the uplink BWP where the 8 UEs are located is UL BWP1. The network side uses the first RNTI to scramble the PDCCH indicating BWP switching, and the PDCCH indicates that the downlink BWP is switched to DL BWP2, and the UE group performing BWP switching includes UE group 1 and UE group 2. The 8 UEs all listen to the PDCCH indicating BWP switching on DL BWP1, and based on the indication of the PDCCH, the UEs in UE group 1 and UE group 2 (i.e. UE1, UE2, UE3 and UE4) receive PDCSH on DL BWP1, and the other UEs (i.e. UE5, UE6, UE7 and UE8) determine not to perform BWP switching. The BWP switching MAC CE included in the PDCSH includes the identities of UE1, UE2, UE3 and UE4, i.e. indicating UE1, UE2, UE3 and UE4 to perform BWP switching. According to the indication of the PDCSH, UE1, UE2, UE3 and UE4 switch the downlink BWP to DL BWP2; and UE1, UE2, UE3 and UE4 switch the uplink BWP to UL BWP2 corresponding to DL BWP2, and send an ACK message on UL BWP2.

[0146] Embodiment three:

[0147] The network configures a common PDCCH search space through broadcast message, and the common PDCCH search space is used for all UEs to monitor the PDCCH indicating BWP switching. Meanwhile, the network configures UE grouping information, and different UE groups use different RNTIs to monitor the PDCCH indicating BWP switching. When the UE receives the PDCCH indicating BWP switching, the UE determines whether to perform BWP switching by further analyzing the payload of the BWP switching MAC CE carried in the PDSCH transmission indicated by the PDCCH. The BWP switching MAC CE can be used to indicate multiple UEs to perform BWP switching.

[0148] The implementation process is as follows:

[0149] Step 1: The UE receives network configuration information, configures BWP related parameters, PDCCH search space related parameters, and UE grouping information. Specifically:

[0150] a) BWP configuration parameters, including UL BWP list and DL BWP list, the UL BWP list and the downlink DL BWP list have the following characteristics:

[0151] Each UL BWP in the UL BWP list does not overlap in the frequency domain;

[0152] Each DL BWP in the DL BWP list does not overlap in the frequency domain;

[0153] The one-to-one correspondence between each UL BWP and DL BWP is determined, and the association relationship between the UL BWP and the DL BWP is used when the UE performs BWP switching in one link direction (such as switching to a first target BWP) to switch the BWP in the other link direction to the BWP associated with the first target BWP. The determination method of the association relationship between the UL BWP and the DL BWP can be:

[0154] Method 1: Network explicit configuration. For example, for each UL BWP, an associated DL BWP ID is configured.

[0155] Method 2: Implicit association. For example, the UL BWP and the DL BWP corresponding to the same BWP ID are associated together.

[0156] The BWP configuration parameters can be carried through broadcast message or UE dedicated RRC signaling.

[0157] b) PDCCH search space configuration, including a first PDCCH search space configuration, the first PDCCH search space being a common PDCCH search space for UEs to monitor PDCCH indicating BWP switching. The first PDCCH search space is configured by system broadcast message.

[0158] c) UE grouping information, indicating the group that the UE belongs to using RRC signaling. The network can configure UEs in a corresponding feature area as the same UE group based on UE location when configuring UE grouping information.

[0159] d) A first RNTI is configured for the UE. UEs in the same group are configured with the same first RNTI, and UEs in different groups are configured with different first RNTIs. All UEs use the first RNTI to monitor PDCCH indicating BWP switching on the first PDCCH search space.

[0160] Step 2: The UE monitors the PDCCH scrambled with the first RNTI on the first PDCCH search space configured by the network based on network configuration. If the UE detects the PDCCH scrambled with the first RNTI on the first PDCCH search space, it proceeds to Step 3. Among them, the target DL BWP ID indicating BWP switching and the PDSCH resource allocation information in the PDCCH DCI.

[0161] Step 3: The UE receives the PDSCH on the current DL BWP based on the received PDCCH indication. The PDSCH contains at least one BWP switching MAC CE. The payload of the BWP switching MAC CE contains at most N C-RNTIs, where the N C-RNTIs are the C-RNTIs of the UEs indicated by the network that need to perform BWP switching. The UE determines whether it needs to perform BWP switching by further parsing the BWP switching MAC CE contained in the PDSCH, specifically:

[0162] a) If the C-RNTI of the UE is contained in at least one BWP switching MAC CE contained in the PDSCH, the UE performs BWP switching and proceeds to Step 4.

[0163] b) If the C-RNTI of the UE is not contained in any of the BWP switching MAC CEs contained in the PDSCH, the UE does not perform BWP switching.

[0164] Step 4: For UEs that determine to perform BWP switching, the UE switches the DL BWP to the target DL BWP and switches the UL BWP to the target UL BWP associated with the target DL BWP.

[0165] Step 5: After the UE completes the BWP switching, the UE sends an ACK to the network on the target BWP.

[0166] A BWP switching schematic diagram of this embodiment is shown in FIG. 1. Figure 7 Figure 7 The basic assumption of the case shown in FIG. 1 is that it is assumed that there are currently 8 UEs working on BWP1, which are UE1, UE2, …, UE8. Among them, UE1 and UE2 correspond to UE group 1, use RNTI1 to monitor the PDCCH indicating BWP switching; UE3 and UE4 correspond to UE group 2, use RNTI2 to monitor the PDCCH indicating BWP switching; UE5 and UE6 correspond to UE group 3, use RNTI3 to monitor the PDCCH indicating BWP switching; and UE7 and UE8 correspond to UE group 4, use RNTI4 to monitor the PDCCH indicating BWP switching.

[0167] In the initial case, the downlink BWP where the 8 UEs are located is DL BWP1, and the uplink BWP where the 8 UEs are located is UL BWP1. The network side uses RNTI1 to scramble the PDCCH indicating BWP switching, and the PDCCH indicates that the downlink BWP is switched to DL BWP2. All the 8 UEs monitor the PDCCH indicating BWP switching on DL BWP1, and since UE group 1 uses RNTI1 to monitor the PDCCH indicating BWP switching, the UEs (i.e., UE1 and UE2) in UE group 1 can monitor the PDCCH. Based on the indication of the PDCCH, UE1 and UE2 receive PDCSH on DL BWP1, and the BWP switching MAC CE contained in PDCSH contains the identities of UE1 and UE2, i.e., indicating UE1 and UE2 to perform BWP switching. According to the indication of PDCSH, UE1 and UE2 switch the downlink BWP to DL BWP2; and UE1 and UE2 switch the uplink BWP to UL BWP2 corresponding to DL BWP2, and send an ACK message on UL BWP2.

[0168] As can be seen from the above, the method for BWP switching in the NTN disclosed in the embodiments of the present application can be applied to the networking mode in which different BWP configurations are configured for different satellite beams to achieve frequency multiplexing. Using this method, the problem of large PDCCH resource overhead caused by the large number of UEs switching BWP in the non-GEO scenario can be effectively alleviated, the UE can perform BWP switching more timely, thereby maintaining the continuity of the service, improving the robustness of beam management, and enabling users to obtain a good experience.

[0169] The embodiments of the present application also propose a BWP switching method, which can be applied to a network device, Figure 8 is an implementation flowchart of a BWP switching method 800 according to an embodiment of the present application, which can be optionally applied to​Figure 1 The method includes at least part of the following.

[0170] S810: The network device sends a PDCCH indicating BWP switching;

[0171] S820: The network device carries a BWP switching MAC CE in the PDSCH indicated by the PDCCH, and the BWP switching MAC CE is used to indicate at least one terminal device performing BWP switching.

[0172] In some embodiments, the BWP switching MAC CE contains the identification of the terminal device performing BWP switching.

[0173] In some embodiments, the DCI of the PDCCH indicating BWP switching includes the identification of the target BWP of BWP switching.

[0174] In some embodiments, the identification of the target BWP includes the identification of the target downlink BWP.

[0175] In some embodiments, the PDCCH indicating BWP switching is used to determine that the terminal device performing BWP switching switches the downlink BWP to the target downlink BWP.

[0176] In some embodiments, the PDCCH indicating BWP switching is also used to determine that the terminal device performing BWP switching switches the uplink BWP to the target uplink BWP corresponding to the target downlink BWP.

[0177] In some embodiments, it further includes:

[0178] The network device sends a broadcast message or RRC signaling containing the BWP configuration parameter, and the BWP configuration parameter includes the correspondence between the uplink BWP and the downlink BWP.

[0179] In some embodiments, the BWP configuration parameter further includes an uplink BWP list and / or a downlink BWP list;

[0180] Each uplink BWP in the uplink BWP list does not overlap in the frequency domain;

[0181] Each downlink BWP in the downlink BWP list does not overlap in the frequency domain.

[0182] In some embodiments, the corresponding uplink BWP and downlink BWP in the correspondence have the same identification.

[0183] In some embodiments, the DCI of the PDCCH indicating the BWP switching comprises terminal device group information indicating that the terminal device needs to perform the BWP switching, for instructing the terminal device in the group to parse the BWP switching MAC CE transmitted in the PDSCH indicated by the PDCCH.

[0184] In some embodiments, the DCI of the PDCCH indicating the BWP switching comprises bit information corresponding to each terminal device group, each of the bit information indicating whether the corresponding terminal device group needs to perform the BWP switching.

[0185] In some embodiments, the method further comprises:

[0186] The network device sends RRC signaling to the terminal device, the RRC signaling comprising information of a terminal device group to which the terminal device belongs.

[0187] In some embodiments, the network device scrambles the PDCCH indicating the BWP switching by using a first RNTI.

[0188] In some embodiments, the method further comprises: the network device configuring the first RNTI for the terminal device through a system message.

[0189] In some embodiments, the network device configures the terminal devices in the same terminal device group to use the same first RNTI to monitor the PDCCH indicating the BWP switching, and configures the terminal devices in different terminal device groups to use different first RNTIs to monitor the PDCCH indicating the BWP switching.

[0190] In some embodiments, the method further comprises:

[0191] The network device sends a first PDCCH indicating the BWP switching in a first PDCCH search space.

[0192] In some embodiments, the method further comprises:

[0193] The first PDCCH search space is a common PDCCH search space.

[0194] In some embodiments, the method further comprises:

[0195] The network device sends a broadcast message comprising configuration information of the first PDCCH search space.

[0196] In some embodiments, the PDSCH comprises at least one BWP switching MAC CE.

[0197] In some embodiments, the BWP switching MAC CE comprises at most N C-RNTIs in the payload, the N being the number of terminal devices that need to perform the BWP switching.

[0198] In some embodiments,

[0199] If the C-RNTI of the terminal device is contained in the payload of at least one BWP switching MAC CE contained in the PDSCH, it is determined that the terminal device performs BWP switching;

[0200] If the C-RNTI of the terminal device is not contained in the payload of any one BWP switching MAC CE contained in the PDSCH, it is determined that the terminal device does not perform BWP switching.

[0201] In some embodiments, further comprising:

[0202] The network device receives an acknowledgement message sent by the terminal device on the target uplink BWP after BWP switching.

[0203] The present application also provides a terminal device, Figure 9 is a structural schematic diagram of the terminal device 900 according to the embodiments of the present application, comprising:

[0204] The listening module 910 is configured to listen to a physical downlink control channel (PDCCH) indicating BWP switching.

[0205] The parsing module 920 is configured to parse a BWP switching medium access control (MAC) control element (CE) carried in a physical downlink shared channel (PDSCH) indicated by the PDCCH.

[0206] The determining module 930 is configured to determine whether to perform BWP switching according to the parsing result.

[0207] In some embodiments, the determining module 930 is configured to determine to perform BWP switching if the identifier of the terminal device is contained in the BWP switching MAC CE.

[0208] In some embodiments, the downlink control information (DCI) of the PDCCH indicating BWP switching comprises an identifier of a target BWP of BWP switching.

[0209] In some embodiments, the identifier of the target BWP comprises an identifier of a target downlink BWP.

[0210] In some embodiments, the determining module 930 is configured to determine to switch the downlink BWP to the target downlink BWP if it is determined to perform BWP switching.

[0211] Referring to Figure 10 In some embodiments, further comprising: a parameter saving module 1040 configured to save BWP configuration parameters, wherein the BWP configuration parameters comprise a correspondence between uplink BWPs and downlink BWPs.

[0212] The determining module 930 is configured to, if it is determined to perform BWP switching, determine a target uplink BWP corresponding to the target downlink BWP according to the correspondence, and determine to switch the uplink BWP to the target uplink BWP.

[0213] In some embodiments, the method further includes: receiving a broadcast message or RRC signaling, wherein the BWP configuration parameter is included in the broadcast message or the RRC signaling.

[0214] In some embodiments, the BWP configuration parameter further includes an uplink BWP list and / or a downlink BWP list.

[0215] Each uplink BWP in the uplink BWP list does not overlap in the frequency domain.

[0216] Each downlink BWP in the downlink BWP list does not overlap in the frequency domain.

[0217] In some embodiments, the corresponding uplink BWP and the corresponding downlink BWP in the correspondence have the same identifier.

[0218] In some embodiments, the DCI of the PDCCH indicating BWP switching includes terminal device grouping information of terminal devices that need to perform BWP switching.

[0219] After the monitoring module 910 monitors the PDCCH indicating BWP switching, the detecting module detects whether the terminal device grouping information of the terminal device to which the terminal device belongs is included in the terminal device grouping information of terminal devices that need to perform BWP switching in the DCI of the PDCCH; if so, the parsing module 920 parses the BWP switching MAC CE transmitted in the PDSCH indicated by the PDCCH; if not, it is determined that BWP switching is not performed.

[0220] In some embodiments, the DCI of the PDCCH indicating BWP switching includes bit information corresponding to each terminal device grouping, and each bit information is used to indicate whether the corresponding terminal device grouping needs to perform BWP switching.

[0221] In some embodiments, the method further includes:

[0222] The second receiving module 1060 is configured to receive RRC signaling, wherein the information of the terminal device grouping to which the terminal device belongs is included in the RRC signaling.

[0223] In some embodiments, the PDCCH indicating BWP switching is scrambled by a first radio network temporary identifier (RNTI).

[0224] The monitoring module 910 monitors the PDCCH indicating the BWP switching by using the first RNTI.

[0225] In some embodiments, further comprising a determining module 1070 configured to determine the first RNTI in a system message configured and / or predefined manner.

[0226] In some embodiments, the monitoring module 910 in the same terminal device group uses the same first RNTI to monitor the PDCCH indicating the BWP switching, and the monitoring module 910 in different terminal device groups uses different first RNTIs to monitor the PDCCH indicating the BWP switching.

[0227] In some embodiments, the monitoring module 910 monitors the first PDCCH indicating the BWP switching in a first PDCCH search space.

[0228] In some embodiments, the first PDCCH search space is a common PDCCH search space.

[0229] In some embodiments, further comprising:

[0230] a third receiving module 1080 configured to receive a broadcast message, wherein the broadcast message comprises configuration information of the first PDCCH search space.

[0231] In some embodiments, the PDSCH comprises at least one BWP switching MAC CE.

[0232] In some embodiments, the payload of the BWP switching MAC CE comprises at most N C-RNTIs (Cell Radio Network Temporary Identifiers), wherein N is the number of terminal devices that need to perform BWP switching.

[0233] In some embodiments, the determining module 930 is configured to:

[0234] if the payload of the at least one BWP switching MAC CE comprised in the PDSCH comprises the C-RNTI of the terminal device, determine to perform BWP switching;

[0235] if the payload of any one of the BWP switching MAC CEs comprised in the PDSCH does not comprise the C-RNTI of the terminal device, determine not to perform BWP switching.

[0236] In some embodiments, further comprising:

[0237] a sending module 1090 configured to send an acknowledgement message on a target uplink BWP after BWP switching.

[0238] It should be understood that the above and other operations and / or functions of the modules in the terminal device according to the embodiments of the present application are respectively for implementing the corresponding procedures of the terminal device in the method 300 Figure 3 for brevity, will not be described here again.

[0239] The embodiments of the present application also propose a network device, Figure 11 is a structural schematic diagram of the network device 1100 according to the embodiments of the present application, comprising:

[0240] The first sending module 1110 is configured to send a PDCCH indicating BWP switching.

[0241] The switching indication module 1120 is configured to carry a BWP switching MAC CE in the PDSCH indicated by the PDCCH, where the BWP switching MAC CE is used to indicate at least one terminal device performing BWP switching.

[0242] In some embodiments, the BWP switching MAC CE contains an identifier of the terminal device performing BWP switching.

[0243] In some embodiments, the DCI of the PDCCH indicating BWP switching contains an identifier of a target BWP of BWP switching.

[0244] In some embodiments, the identifier of the target BWP includes an identifier of a target downlink BWP.

[0245] In some embodiments, the PDCCH indicating BWP switching is used to determine that the terminal device performing BWP switching switches the downlink BWP to the target downlink BWP.

[0246] In some embodiments, the PDCCH indicating BWP switching is also used to determine that the terminal device performing BWP switching switches the uplink BWP to a target uplink BWP corresponding to the target downlink BWP.

[0247] As shown in some embodiments, the network device further comprises: Figure 12

[0248] The second sending module 1230 is configured to send a broadcast message or RRC signaling containing the BWP configuration parameter, where the BWP configuration parameter includes the correspondence between the uplink BWP and the downlink BWP.

[0249] In some embodiments, the BWP configuration parameter further includes an uplink BWP list and / or a downlink BWP list.

[0250] Each uplink BWP in the uplink BWP list does not overlap in the frequency domain.

[0251] ​The downlink BWPs in the downlink BWP list do not overlap in the frequency domain.

[0252] In some embodiments, the corresponding uplink BWPs and downlink BWPs in the correspondence have the same identity.

[0253] In some embodiments, the DCI of the PDCCH indicating the BWP switching includes terminal device group information that needs to perform the BWP switching, for instructing terminal devices within the group to parse the BWP switching MAC CE transmitted in the PDSCH indicated by the PDCCH.

[0254] In some embodiments, the DCI of the PDCCH indicating the BWP switching includes bit information corresponding to each terminal device group, and each bit information is used to indicate whether the corresponding terminal device group needs to perform the BWP switching.

[0255] In some embodiments, the method further comprises:

[0256] The third sending module 1240 is configured to send, to the terminal device, RRC signaling containing information of a terminal device group to which the terminal device belongs.

[0257] In some embodiments, the network device scrambles the PDCCH indicating the BWP switching by using a first RNTI.

[0258] In some embodiments, the method further comprises: a configuration module 1250 configured to configure the terminal device with the first RNTI through a system message.

[0259] In some embodiments, the network device configures terminal devices in the same terminal device group to use the same first RNTI to monitor the PDCCH indicating the BWP switching, and configures terminal devices in different terminal device groups to use different first RNTIs to monitor the PDCCH indicating the BWP switching.

[0260] In some embodiments, the first sending module 1010 sends the first PDCCH indicating the BWP switching in a first PDCCH search space.

[0261] In some embodiments, the first PDCCH search space is a common PDCCH search space.

[0262] In some embodiments, the method further comprises:

[0263] The fourth sending module 1260 is configured to send a broadcast message containing configuration information of the first PDCCH search space.

[0264] In some embodiments, the PDSCH contains at least one BWP switching MAC CE.

[0265] In some embodiments, the payload of the BWP switching MAC CE contains at most N C-RNTIs, where N is the number of terminal devices that need to perform BWP switching.

[0266] In some embodiments, if the payload of at least one BWP switching MAC CE contained in the PDSCH contains the C-RNTI of the terminal device, it is determined that the terminal device performs BWP switching.

[0267] If the payload of any one of the BWP switching MAC CEs contained in the PDSCH does not contain the C-RNTI of the terminal device, it is determined that the terminal device does not perform BWP switching.

[0268] In some embodiments, the method further comprises:

[0269] The acknowledgement message receiving module 1270 is configured to receive an acknowledgement message sent by the terminal device on the target uplink BWP after BWP switching.

[0270] It should be understood that the above and other operations and / or functions of the modules in the network device according to the embodiments of the present application are respectively for implementing the corresponding procedures of the network device in the method 800. Figure 8 Therefore, details are not described herein.

[0271] Figure 13 FIG. 13 is a schematic structural diagram of a communication device 1300 according to an embodiment of the present application. Figure 13 As shown in FIG. 13, the communication device 1300 includes a processor 1310.

[0272] Optionally, as shown in FIG. 13, the communication device 1300 can further include a memory 1320. Figure 13 In this case, the processor 1310 can invoke and run a computer program from the memory 1320 to implement the method according to the embodiments of the present application.

[0273] In this case, the memory 1320 can be a separate device independent of the processor 1310, or can be integrated in the processor 1310.

[0274] Optionally, as shown in FIG. 13, the communication device 1300 can further include a transceiver 1330. Figure 13 In this case, the processor 1310 can control the transceiver 1330 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0275] The transceiver 1330 can include a transmitter and a receiver. The transceiver 1330 can further include an antenna, and the number of the antenna can be one or more.

[0276] Optionally, the communication device 1300 can be a first terminal device of the embodiments of the present application, and the communication device 1300 can implement the corresponding processes implemented by the first terminal device in each method of the embodiments of the present application. For the sake of brevity, details are not described herein.

[0277] Optionally, the communication device 1300 can be a communication device of the embodiments of the present application, such as a network device or a second terminal device, and the communication device 1300 can implement the corresponding processes implemented by the communication device in each method of the embodiments of the present application. For the sake of brevity, details are not described herein.

[0278] Figure 14 is a schematic structural diagram of a chip 1400 according to the embodiments of the present application. Figure 14 The chip 1400 shown includes a processor 1410. The processor 1410 can call and run a computer program from a memory to implement the method in the embodiments of the present application.

[0279] Optionally, as shown in Figure 14 The chip 1400 can further include a memory 1420. The processor 1410 can call and run a computer program from the memory 1420 to implement the method in the embodiments of the present application.

[0280] The memory 1420 can be a separate device independent of the processor 1410, or can be integrated in the processor 1410.

[0281] Optionally, the chip 1400 can further include an input interface 1430. The processor 1410 can control the input interface 1430 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.

[0282] Optionally, the chip 1400 can further include an output interface 1440. The processor 1410 can control the output interface 1440 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

[0283] Optionally, the chip can be applied to the terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the terminal device in each method of the embodiments of the present application. For the sake of brevity, details are not described herein.

[0284] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system-level chip, a system chip, a chip system, or a system-on-chip chip.

[0285] The processor mentioned above can be a general processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC) or other programmable logic device, a transistor logic device, a discrete hardware component, etc. Among them, the general processor mentioned above can be a microprocessor or any conventional processor, etc.

[0286] The memory mentioned above can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM).

[0287] It should be understood that the memory mentioned above is an example but not a limiting description, for example, the memory in the embodiments of the present application can also be a static RAM (SRAM), a dynamic RAM (DRAM), a synchronous DRAM (SDRAM), a double data rate SDRAM (DDR SDRAM), an enhanced SDRAM (ESDRAM), a synch link DRAM (SLDRAM) and a direct memory bus random access memory (Direct Rambus RAM, DR RAM) and the like. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable type of memory.

[0288] In the above embodiments, all or part of the processes can be implemented by software, hardware, firmware, or any combination thereof. When implemented by software, all or part of the processes can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed by a computer, the computer instructions generate all or part of the processes or functions described in the embodiments of the present application. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center through a wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center, etc. containing one or more available media sets. The available medium can be a magnetic medium (for example, floppy disk, hard disk, magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, solid state disk (SSD)), etc.

[0289] It should be understood that the size of the sequence number of each process described above in various embodiments of the present application does not mean the order of execution, and the execution order of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0290] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0291] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for switching the working bandwidth portion (BWP), comprising: The terminal device listens to the physical downlink control channel (PDCCH) that indicates BWP handover; The BWP handover media access control (MAC) control unit CE carried in the physical downlink shared channel (PDSCH) indicated by the PDCCH is analyzed. Determine whether to perform a BWP switch based on the parsing results. The downlink control information (DCI) of the PDCCH indicating BWP handover includes terminal device packet information that requires BWP handover. After listening to the PDCCH indicating BWP handover, the terminal device checks whether the terminal device packet information requiring BWP handover in the DCI of the PDCCH contains information about the terminal device packet to which the terminal device belongs. If it does, the terminal device receives the PDSCH and continues to execute the step of parsing the BWP handover MAC CE transmitted in the PDSCH indicated by the PDCCH. If it does not contain the information, the terminal device determines that BWP handover will not be performed. The DCI of the PDCCH indicating BWP handover includes bit information corresponding to each terminal device group. Each bit information is used to indicate whether the corresponding terminal device group needs to perform BWP handover. If the bit information corresponding to the terminal device group to which the terminal device belongs is set to a first value, it means that the terminal device group includes terminal devices that need to perform BWP handover. If the bit information corresponding to the terminal device group to which the terminal device belongs is set to a second value, it means that the terminal device group does not include terminal devices that need to perform BWP handover. The step of determining whether to perform a BWP handover based on the parsing results includes: If the BWP handover MAC CE contains the identifier of the terminal device, then a BWP handover is determined to be performed.

2. The method according to claim 1, wherein, The DCI of the PDCCH that indicates BWP switching includes the identifier of the target BWP for BWP switching.

3. The method according to claim 2, wherein, The identifier of the target BWP includes: the identifier of the target downlink BWP.

4. The method according to claim 3, wherein, If a BWP handover is determined to be performed, the terminal device will switch the downlink BWP to the target downlink BWP.

5. The method according to claim 4, further comprising: The terminal device stores BWP configuration parameters, which include the correspondence between uplink BWP and downlink BWP. If it is determined that a BWP handover will be performed, the terminal device determines the target uplink BWP corresponding to the target downlink BWP according to the correspondence, and switches the uplink BWP of the terminal device to the target uplink BWP.

6. The method according to claim 5, further comprising: The terminal device receives a broadcast message or RRC signaling, and the broadcast message or RRC signaling contains the BWP configuration parameters.

7. The method according to claim 5 or 6, wherein, The BWP configuration parameters also include an uplink BWP list and / or a downlink BWP list; The uplink BWPs in the uplink BWP list do not overlap in the frequency domain; The downlink BWPs in the downlink BWP list do not overlap in the frequency domain.

8. The method according to claim 5 or 6, wherein, The corresponding uplink BWP and downlink BWP in the correspondence have the same identifier.

9. The method according to claim 1, further comprising: The terminal device receives RRC signaling, which contains information about the terminal device group to which the terminal device belongs.

10. The method according to any one of claims 1 to 6, wherein, The PDCCH indicating BWP handover is scrambled with the first wireless network temporary identifier RNTI. The terminal device uses the first RNTI to listen to the PDCCH indicating the BWP switch.

11. The method of claim 10, further comprising: The terminal device determines the first RNTI through system message configuration and / or predefined methods.

12. The method according to claim 10, wherein, Terminal devices in the same terminal device group use the same first RNTI to listen to the PDCCH indicating BWP handover, while terminal devices in different terminal device groups use different first RNTIs to listen to the PDCCH indicating BWP handover.

13. The method according to any one of claims 1 to 6, wherein, The terminal device listens to the first PDCCH indicating BWP switching in the first PDCCH search space.

14. The method according to claim 13, wherein, The first PDCCH search space is a public PDCCH search space.

15. The method of claim 13, further comprising: The terminal device receives a broadcast message, which includes configuration information of the first PDCCH search space.

16. The method according to any one of claims 1 to 6, wherein, The PDSCH includes at least one of the BWP switching MAC CEs.

17. The method according to any one of claims 1 to 6, wherein, The payload of the BWP handover MAC CE includes up to N cell radio network temporary identifiers (C-RNTIs), where N is the number of terminal devices that need to perform BWP handover.

18. The method according to claim 17, wherein, The step of determining whether to perform a BWP handover based on the parsing results also includes: If the payload of at least one BWP handover MAC CE included in the PDSCH contains the C-RNTI of the terminal device, then it is determined to perform a BWP handover. If the payload of any BWP handover MAC CE included in the PDSCH does not contain the C-RNTI of the terminal device, then it is determined that BWP handover will not be performed.

19. The method according to any one of claims 1 to 6, further comprising: The terminal device sends an acknowledgment message on the target uplink BWP after the BWP handover.

20. A method for switching BWPs, comprising: The network device sends a PDCCH indicating a BWP handover; The network device carries a BWP handover MAC CE in the PDSCH indicated by the PDCCH. The BWP handover MAC CE is used to indicate at least one terminal device performing the BWP handover. The BWP handover MAC CE contains the identifier of the terminal device performing the BWP handover. The DCI of the PDCCH indicating BWP handover includes terminal device packet information that requires BWP handover. This is used by the terminal device, after listening to the PDCCH indicating BWP handover, to detect whether the terminal device packet information requiring BWP handover in the DCI of the PDCCH contains information about the terminal device packet to which the terminal device belongs. If it does, the terminal device receives the PDSCH and continues to execute the step of parsing the BWP handover MACCE transmitted in the PDSCH indicated by the PDCCH; if it does not contain the MACCE, the terminal device determines not to perform BWP handover. The DCI of the PDCCH indicating BWP handover includes bit information corresponding to each terminal device group. Each bit information is used to indicate whether the corresponding terminal device group needs to perform BWP handover. If the bit information corresponding to the terminal device group to which the terminal device belongs is set to a first value, it means that the terminal device group includes terminal devices that need to perform BWP handover. If the bit information corresponding to the terminal device group to which the terminal device belongs is set to a second value, it means that the terminal device group does not include terminal devices that need to perform BWP handover.

21. The method according to claim 20, wherein, The DCI of the PDCCH that indicates BWP switching includes the identifier of the target BWP for BWP switching.

22. The method according to claim 21, wherein, The identifier of the target BWP includes: the identifier of the target downlink BWP.

23. The method according to claim 22, wherein, The PDCCH that indicates BWP handover is used to determine that the terminal device performing the BWP handover will switch the downlink BWP to the target downlink BWP.

24. The method according to claim 23, wherein the PDCCH indicating BWP handover is further configured to determine that the terminal device performing the BWP handover will switch the uplink BWP to the target uplink BWP corresponding to the target downlink BWP.

25. The method of claim 24, further comprising: The network device sends a broadcast message or RRC signaling, which contains BWP configuration parameters, including the correspondence between uplink BWP and downlink BWP.

26. The method according to claim 24 or 25, wherein, The BWP configuration parameters also include an uplink BWP list and / or a downlink BWP list; The uplink BWPs in the uplink BWP list do not overlap in the frequency domain; The downlink BWPs in the downlink BWP list do not overlap in the frequency domain.

27. The method according to claim 24 or 25, wherein, The corresponding uplink BWP and downlink BWP in the correspondence have the same identifier.

28. The method of claim 20, further comprising: The network device sends RRC signaling to the terminal device, and the RRC signaling contains information about the terminal device's packet.

29. The method according to any one of claims 20 to 25, wherein, The network device uses a first RNTI to scramble the PDCCH indicating BWP handover.

30. The method of claim 29, further comprising: The network device configures the first RNTI for the terminal device via system messages.

31. The method according to claim 29, wherein, The network devices are configured such that terminal devices in the same terminal device group use the same first RNTI to listen to the PDCCH indicating BWP handover, while terminal devices in different terminal device groups use different first RNTIs to listen to the PDCCH indicating BWP handover.

32. The method according to any one of claims 20 to 25, wherein, The network device sends a first PDCCH indicating BWP handover in the first PDCCH search space.

33. The method according to claim 32, wherein, The first PDCCH search space is a public PDCCH search space.

34. The method of claim 33, further comprising: The network device sends a broadcast message, which includes configuration information of the first PDCCH search space.

35. The method according to any one of claims 20 to 25, wherein, The PDSCH includes at least one of the BWP switching MAC CEs.

36. The method according to any one of claims 20 to 25, wherein, The payload of the BWP handover MAC CE contains at most N C-RNTIs, where N is the number of terminal devices that need to perform BWP handover.

37. The method of claim 36, wherein, If the payload of at least one BWP handover MAC CE included in the PDSCH contains the C-RNTI of the terminal device, then it is determined that the terminal device performs a BWP handover. If the payload of any BWP handover MAC CE included in the PDSCH does not contain the terminal device's C-RNTI, then it is determined that the terminal device will not perform a BWP handover.

38. The method according to any one of claims 20 to 25, further comprising: The network device receives an acknowledgment message sent by the terminal device on the target uplink BWP after the BWP handover.

39. A terminal device, comprising: The monitoring module is used to monitor the physical downlink control channel (PDCCH) that indicates BWP handover; The parsing module is used to parse the BWP handover media access control (MAC) control unit CE carried in the physical downlink shared channel (PDSCH) indicated by the PDCCH. The decision module is used to determine whether to perform a BWP switch based on the parsing results. The DCI of the PDCCH indicating BWP handover includes information about the terminal device packets requiring BWP handover. After listening to the PDCCH indicating BWP handover, the monitoring module checks whether the information about the terminal device packets requiring BWP handover in the DCI of the PDCCH includes information about the terminal device packet to which the terminal device belongs. If it does, the terminal device receives the PDSCH, and the parsing module parses the BWP handover MAC CE transmitted in the PDSCH indicated by the PDCCH. If it does not, it is determined that BWP handover will not be performed. The DCI of the PDCCH indicating BWP handover includes bit information corresponding to each terminal device group. Each bit information is used to indicate whether the corresponding terminal device group needs to perform BWP handover. If the bit information corresponding to the terminal device group to which the terminal device belongs is set to a first value, it means that the terminal device group includes terminal devices that need to perform BWP handover. If the bit information corresponding to the terminal device group to which the terminal device belongs is set to a second value, it means that the terminal device group does not include terminal devices that need to perform BWP handover. The determination module is configured to determine to perform a BWP handover if the BWP handover MAC CE contains the identifier of the terminal device.

40. The terminal device according to claim 39, wherein, The downlink control information (DCI) of the PDCCH indicating BWP handover includes the identifier of the target BWP for the handover.

41. The terminal device according to claim 40, wherein, The identifier of the target BWP includes: the identifier of the target downlink BWP.

42. The terminal device according to claim 41, wherein, The determination module is used to determine, if it is determined that a BWP handover should be performed, to switch the downlink BWP to the target downlink BWP.

43. The terminal device according to claim 42, further comprising: The parameter storage module is used to store BWP configuration parameters, which include the correspondence between uplink BWP and downlink BWP. The determination module is used to, if it is determined that a BWP handover will be performed, determine the target uplink BWP corresponding to the target downlink BWP according to the correspondence, and determine to switch the uplink BWP to the target uplink BWP.

44. The terminal device according to claim 43, further comprising: The first receiving module is used to receive broadcast messages or RRC signaling, wherein the broadcast messages or RRC signaling contain the BWP configuration parameters.

45. The terminal device according to claim 43 or 44, wherein, The BWP configuration parameters also include an uplink BWP list and / or a downlink BWP list; The uplink BWPs in the uplink BWP list do not overlap in the frequency domain; The downlink BWPs in the downlink BWP list do not overlap in the frequency domain.

46. ​​The terminal device according to claim 43 or 44, wherein, The corresponding uplink BWP and downlink BWP in the correspondence have the same identifier.

47. The terminal device according to claim 39, further comprising: The second receiving module is used to receive RRC signaling, which contains information about the terminal device group to which the terminal device is located.

48. The terminal device according to any one of claims 39 to 44, wherein, The PDCCH indicating BWP handover is scrambled with the first wireless network temporary identifier RNTI. The monitoring module uses the first RNTI to monitor the PDCCH indicating BWP switching.

49. The terminal device according to claim 48, further comprising: The determination module is used to determine the first RNTI through system message configuration and / or predefined methods.

50. The terminal device according to claim 48, wherein, The listening modules in the same terminal device group use the same first RNTI to listen to the PDCCH indicating BWP handover, while the listening modules in different terminal device groups use different first RNTIs to listen to the PDCCH indicating BWP handover.

51. The terminal device according to any one of claims 39 to 44, wherein, The monitoring module listens to the first PDCCH indicating BWP switching in the first PDCCH search space.

52. The terminal device according to claim 51, wherein, The first PDCCH search space is a public PDCCH search space.

53. The terminal device according to claim 51, further comprising: The third receiving module is used to receive broadcast messages, which include configuration information of the first PDCCH search space.

54. The terminal device according to any one of claims 39 to 44, wherein, The PDSCH includes at least one of the BWP switching MAC CEs.

55. The terminal device according to any one of claims 39 to 44, wherein, The payload of the BWP handover MAC CE includes up to N cell radio network temporary identifiers (C-RNTIs), where N is the number of terminal devices that need to perform BWP handover.

56. The terminal device according to claim 55, wherein, The judgment module is also used for: If the payload of at least one BWP handover MAC CE included in the PDSCH contains the C-RNTI of the terminal device, then it is determined to perform a BWP handover. If the payload of any BWP handover MAC CE included in the PDSCH does not contain the C-RNTI of the terminal device, then it is determined that BWP handover will not be performed.

57. The terminal device according to any one of claims 39 to 44, further comprising: The sending module is used to send an acknowledgment message on the target uplink BWP after a BWP handover.

58. A network device, comprising: The first transmitting module is used to transmit the PDCCH indicating BWP switching; A handover indication module is configured to carry a BWP handover MAC CE in the PDSCH indicated by the PDCCH, wherein the BWP handover MAC CE is used to indicate at least one terminal device performing a BWP handover. The BWP handover MAC CE contains the identifier of the terminal device performing the BWP handover. The DCI of the PDCCH indicating BWP handover includes terminal device packet information that requires BWP handover. This is used by the terminal device, after listening to the PDCCH indicating BWP handover, to detect whether the terminal device packet information requiring BWP handover in the DCI of the PDCCH contains information about the terminal device packet to which the terminal device belongs. If it does, the terminal device receives the PDSCH and continues to execute the step of parsing the BWP handover MACCE transmitted in the PDSCH indicated by the PDCCH; if it does not contain the MACCE, the terminal device determines not to perform BWP handover. The DCI of the PDCCH indicating BWP handover includes bit information corresponding to each terminal device group. Each bit information is used to indicate whether the corresponding terminal device group needs to perform BWP handover. If the bit information corresponding to the terminal device group to which the terminal device belongs is set to a first value, it means that the terminal device group includes terminal devices that need to perform BWP handover. If the bit information corresponding to the terminal device group to which the terminal device belongs is set to a second value, it means that the terminal device group does not include terminal devices that need to perform BWP handover.

59. The network device according to claim 58, wherein, The DCI of the PDCCH that indicates BWP switching includes the identifier of the target BWP for BWP switching.

60. The network device according to claim 59, wherein, The identifier of the target BWP includes: the identifier of the target downlink BWP.

61. The network device according to claim 60, wherein, The PDCCH that indicates BWP handover is used to determine that the terminal device performing the BWP handover will switch the downlink BWP to the target downlink BWP.

62. The network device according to claim 61, wherein the PDCCH indicating BWP handover is further configured to determine that the terminal device performing the BWP handover will switch the uplink BWP to the target uplink BWP corresponding to the target downlink BWP.

63. The network device according to claim 62, further comprising: The second sending module is used to send broadcast messages or RRC signaling, wherein the broadcast messages or RRC signaling contain BWP configuration parameters, and the BWP configuration parameters include the correspondence between uplink BWP and downlink BWP.

64. The network device according to claim 62 or 63, wherein, The BWP configuration parameters also include an uplink BWP list and / or a downlink BWP list; The uplink BWPs in the uplink BWP list do not overlap in the frequency domain; The downlink BWPs in the downlink BWP list do not overlap in the frequency domain.

65. The network device according to claim 62 or 63, wherein, The corresponding uplink BWP and downlink BWP in the correspondence have the same identifier.

66. The network device according to claim 58, further comprising: The third sending module is used to send RRC signaling to the terminal device, wherein the RRC signaling contains information about the terminal device group to which the terminal device is located.

67. The network device according to any one of claims 58 to 63, wherein, The network device uses a first RNTI to scramble the PDCCH indicating BWP handover.

68. The network device according to claim 67, further comprising: The configuration module is used to configure the first RNTI for the terminal device via system messages.

69. The network device according to claim 67, wherein, The network devices are configured such that terminal devices in the same terminal device group use the same first RNTI to listen to the PDCCH indicating BWP handover, while terminal devices in different terminal device groups use different first RNTIs to listen to the PDCCH indicating BWP handover.

70. The network device according to any one of claims 58 to 63, wherein, The first transmitting module transmits a first PDCCH indicating BWP switching in the first PDCCH search space.

71. The network device according to claim 70, wherein, The first PDCCH search space is a public PDCCH search space.

72. The network device according to claim 71, further comprising: The fourth sending module is used to send a broadcast message, which includes the configuration information of the first PDCCH search space.

73. The network device according to any one of claims 58 to 63, wherein, The PDSCH includes at least one of the BWP switching MAC CEs.

74. The network device according to any one of claims 58 to 63, wherein, The payload of the BWP handover MAC CE contains at most N C-RNTIs, where N is the number of terminal devices that need to perform BWP handover.

75. The network device according to claim 74, wherein, If the payload of at least one BWP handover MAC CE included in the PDSCH contains the C-RNTI of the terminal device, then it is determined that the terminal device performs a BWP handover. If the payload of any BWP handover MAC CE included in the PDSCH does not contain the terminal device's C-RNTI, then it is determined that the terminal device will not perform a BWP handover.

76. The network device according to any one of claims 58 to 63, further comprising: The confirmation message receiving module is used to receive confirmation messages sent by the terminal device on the target uplink BWP after the BWP handover.

77. A terminal device, comprising: A processor and a memory for storing a computer program, the processor for calling and running the computer program stored in the memory to perform the method as described in any one of claims 1 to 19.

78. A network device, comprising: A processor and a memory for storing a computer program, the processor for calling and running the computer program stored in the memory to perform the method as described in any one of claims 20 to 38.

79. A chip, comprising: A processor for retrieving and running a computer program from memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 1 to 19.

80. A chip, comprising: A processor for retrieving and running a computer program from memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 20 to 38.

81. A computer-readable storage medium for storing a computer program that causes a computer to perform the method as claimed in any one of claims 1 to 19.

82. A computer-readable storage medium for storing a computer program that causes a computer to perform the method as described in any one of claims 20 to 38.

83. A computer program product comprising computer program instructions that cause a computer to perform the method as described in any one of claims 1 to 19.

84. A computer program product comprising computer program instructions that cause a computer to perform the method as described in any one of claims 20 to 38.

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