BWP switching method, device, and terminal equipment

Abstract

An embodiment of the present application provides a method and apparatus for BWP switching, and a terminal device. The method includes: the terminal device switching from a first BWP to a second BWP based on a first trigger indication; wherein the first BWP is a dedicated BWP for receiving unicast services, and the second BWP is an MBS BWP for receiving Multimedia Multicast Service (MBS) services; or, the first BWP is an MBS BWP for receiving MBS services, and the second BWP is a dedicated BWP for receiving unicast services.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of mobile communication technology, and in particular to a method and apparatus for switching a bandwidth part (Band Width Part, BWP), and a terminal device. Background Art

[0002] Terminal devices can only receive Multimedia Broadcast Service (MBS) services after entering the Radio Resource Control (RRC) connected state. Terminal devices also need to receive unicast services while receiving MBS services. How to achieve simultaneous reception of both types of services needs to be clarified. Summary of the Invention

[0003] The embodiments of the present application provide a method and apparatus for BWP switching, and a terminal device.

[0004] The BWP switching method provided in the embodiment of the present application includes:

[0005] The terminal device switches from the first BWP to the second BWP based on the first trigger indication; wherein,

[0006] The first BWP is a dedicated BWP for receiving unicast services, and the second BWP is an MBS BWP for receiving MBS services; or,

[0007] The first BWP is an MBS BWP for receiving MBS services, and the second BWP is a dedicated BWP for receiving unicast services.

[0008] The apparatus for BWP switching provided in an embodiment of the present application includes:

[0009] The switching unit is configured to switch from the first BWP to the second BWP based on the first trigger indication; wherein,

[0010] The first BWP is a dedicated BWP for receiving unicast services, and the second BWP is an MBS BWP for receiving MBS services; or,

[0011] The first BWP is an MBS BWP for receiving MBS services, and the second BWP is a dedicated BWP for receiving unicast services.

[0012] The terminal device provided in an embodiment of the present application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to perform the above-mentioned BWP switching method.

[0013] The chip provided in the embodiment of the present application is used to implement the above-mentioned BWP switching method.

[0014] Specifically, the chip includes: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned BWP switching method.

[0015] The computer-readable storage medium provided in the embodiment of the present application is used to store a computer program, which enables a computer to execute the above-mentioned BWP switching method.

[0016] The computer program product provided in the embodiments of the present application includes computer program instructions, which enable a computer to execute the above-mentioned BWP switching method.

[0017] The computer program provided in the embodiment of the present application, when executed on a computer, enables the computer to execute the above-mentioned BWP switching method.

[0018] Through the above technical solution, a mechanism is proposed to implement the switching of terminal devices between MBS BWP and dedicated BWP. By switching between MBS BWP and dedicated BWP, it can be ensured that the terminal device can receive both MBS services and unicast services, thereby ensuring the reception of two types of services at the same time, avoiding the interruption of one type of service due to the reception of the other type of service. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application;

[0021] Figure 2 1 is a flow chart of a BWP switching method provided in an embodiment of the present application;

[0022] Figure 3 Schematic diagram of BWP switching provided by an embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the structure of the BWP switching device provided in an embodiment of the present application;

[0024] Figure 5 This is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0025] Figure 6 is a schematic structural diagram of a chip according to an embodiment of the present application;

[0026] Figure 7 It is a schematic block diagram of a communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, 5G communication system or future communication system, etc.

[0029] For example, the communication system 100 used in the embodiment of the present application is as follows: Figure 1 As shown. The communication system 100 may include a network device 110, which may be a device that communicates with a terminal 120 (or referred to as a communication terminal, terminal). The network device 110 may provide communication coverage for a specific geographical area and may communicate with terminals located within the coverage area. Optionally, the network device 110 may be an evolved base station (eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (CRAN), or the network device may be a mobile switching center, a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future communication system, etc.

[0030] The communication system 100 also includes at least one terminal 120 located within the coverage area of ​​the network device 110. As used herein, "terminal" includes, but is not limited to, a connection via a wired line, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and / or another terminal configured to receive / send communication signals; and / or an Internet of Things (IoT) device. A terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," "wireless terminal," or "mobile terminal." Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communications capabilities; PDAs that may include radiotelephones, pagers, Internet / Intranet access, web browsers, organizers, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. A terminal may be referred to as an access terminal, user equipment (UE), a subscriber unit, a subscriber 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. The access terminal 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), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal in a 5G network, or a terminal in a future evolved PLMN, etc.

[0031] Optionally, the terminals 120 may perform device-to-device (D2D) communication with each other.

[0032] Optionally, the 5G communication system or 5G network may also be referred to as a New Radio (NR) system or NR network.

[0033] Figure 1 One network device and two terminals are shown as an example. Optionally, the communication system 100 may include multiple network devices and each network device may include another number of terminals within its coverage area. This embodiment of the present application does not limit this.

[0034] Optionally, the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0035] It should be understood that the device with communication function in the network / system in the embodiment of the present application can be called a communication device. Figure 1 Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal 120 with communication functions. The network device 110 and the terminal 120 may be the specific devices described above and will not be repeated here; the communication equipment may also include other devices in the communication system 100, such as a network controller, a mobile management entity and other network entities, which is not limited in the embodiments of the present application.

[0036] It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" is simply a description of an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the related objects are in an "or" relationship.

[0037] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions related to the embodiments of the present application are described below.

[0038] With the pursuit of speed, latency, high-speed mobility, energy efficiency and the diversity and complexity of services in future life, the 3GPP (3 rd The 3GPP (3rd Generation Partnership Project) international standards organization has begun developing 5G. The main application scenarios of 5G are: enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine-type communications (mMTC).

[0039] On the one hand, eMBB still aims to provide users with multimedia content, services, and data, and demand for this is growing rapidly. On the other hand, since eMBB may be deployed in different scenarios, such as indoors, in urban areas, and in rural areas, its capabilities and requirements vary significantly. Therefore, it cannot be generalized and requires detailed analysis based on specific deployment scenarios. Typical applications of URLLC include industrial automation, power automation, remote medical operations (surgery), and traffic safety. Typical characteristics of mMTC include high connection density, small data volumes, latency-insensitive services, low module costs, and long service life.

[0040] In the early days of NR deployment, achieving complete NR coverage was difficult, resulting in a typical network coverage model consisting of wide-area LTE coverage and isolated NR coverage. Furthermore, a large number of LTE deployments operate below 6 GHz, leaving limited spectrum available for 5G. Therefore, NR must explore spectrum applications above 6 GHz, despite the limited coverage and rapid signal fading in higher frequency bands. Furthermore, to protect mobile operators' initial investments in LTE, a tight interworking mode between LTE and NR was proposed.

[0041] RRC status

[0042] To reduce air interface signaling and quickly restore wireless connections and data services, 5G defines a new Radio Resource Control (RRC) state, the RRC_INACTIVE state. This state is different from the RRC_IDLE state and the RRC_ACTIVE state.

[0043] in,

[0044] 1) RRC_IDLE state (abbreviated as idle state): Mobility is based on cell selection and reselection of the terminal device. Paging is initiated by the Core Network (CN), and the paging area is configured by the CN. There is no terminal device context on the base station side and no RRC connection exists.

[0045] 2) RRC_CONNECTED state (also called the connected state): An RRC connection exists, and a device context exists on both the base station and the device. The network knows the device's location at the cell level. Mobility is controlled by the network. Unicast data can be transmitted between the device and the base station.

[0046] 3) RRC_INACTIVE state (abbreviated as inactive state): Mobility is based on cell selection and reselection of the terminal device, there is a connection between CN and NR, the terminal device context exists on a certain base station, paging is triggered by RAN, and the RAN-based paging area is managed by RAN. The network side knows the location of the terminal device based on the RAN paging area level.

[0047] BWP

[0048] The maximum channel bandwidth in 5G can be 400MHz (i.e., wideband), which is significantly larger than the 20MHz maximum channel bandwidth in LTE. If a terminal device operates on a wideband carrier (i.e., the maximum channel bandwidth), the device's power consumption will be very high. Therefore, it is recommended that the terminal device's RF bandwidth be adjusted based on the terminal device's actual throughput. To this end, the concept of BWP has been introduced. The motivation for introducing BWP is to optimize terminal device power consumption. For example, if the terminal device has very low rate requirements, a smaller bandwidth (i.e., a smaller BWP) can be configured for the terminal device. If the terminal device has very high rate requirements, a larger bandwidth (i.e., a larger BWP) can be configured for the terminal device. If the terminal device supports high rates or operates in carrier aggregation (CA) mode, multiple BWPs can be configured for the terminal device. Furthermore, another purpose of BWP is to trigger the coexistence of multiple numerologies within a cell, such as BWP1 for numerology 1 and BWP2 for numerology 2.

[0049] Terminal devices in idle or inactive states reside on the initial BWP. The initial BWP is visible to terminal devices in idle or inactive states. Terminal devices can obtain information such as the Master Information Block (MIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), and paging on the initial BWP.

[0050] MBMS

[0051] MBMS is a technology that transmits data from one data source to multiple terminal devices by sharing network resources. While providing multimedia services, it can effectively utilize network resources and achieve broadcast and multicast of multimedia services at a higher rate (such as 256kbps).

[0052] Because MBMS spectrum efficiency is low and insufficient to effectively carry and support mobile TV services, 3GPP has explicitly proposed enhancing support for downlink high-speed MBMS services in LTE and has defined design requirements for the physical layer and air interface.

[0053] 3GPP Release 9 introduced evolved MBMS (eMBMS) into LTE. eMBMS introduced the concept of a single frequency network (SFN), namely, Multimedia Broadcast Multicast Service Single Frequency Network (MBSFN). MBSFN uses a unified frequency to transmit service data simultaneously across all cells, while ensuring inter-cell synchronization. This approach significantly improves the overall signal-to-noise ratio distribution of the cell, and consequently, significantly increases spectrum efficiency. eMBMS implements service broadcast and multicast based on the IP multicast protocol.

[0054] In LTE or LTE-Advanced (LTE-A), MBMS only has a broadcast bearer mode, not a multicast bearer mode. In addition, the reception of MBMS services is applicable to terminal devices in an idle state or a connected state.

[0055] 3GPP R13 introduced the Single Cell Point To Multipoint (SC-PTM) concept, which is based on the MBMS network architecture.

[0056] MBMS introduces new logical channels, including the Single Cell-Multicast Control Channel (SC-MCCH) and the Single Cell-Multicast Transport Channel (SC-MTCH). SC-MCCH and SC-MTCH are mapped to the Downlink Shared Channel (DL-SCH). Furthermore, DL-SCH is mapped to the Physical Downlink Shared Channel (PDSCH). SC-MCCH and SC-MTCH are logical channels, DL-SCH is a transport channel, and PDSCH is a physical channel. SC-MCCH and SC-MTCH do not support Hybrid Automatic Repeat reQuest (HARQ) operations.

[0057] MBMS introduces a new System Information Block (SIB) type, namely SIB20. Specifically, the configuration information of SC-MCCH is transmitted through SIB20, and there is only one SC-MCCH in a cell. The configuration information of SC-MCCH includes: the modification period of SC-MCCH, the repetition period of SC-MCCH, and the radio frame and subframe for scheduling SC-MCCH. Furthermore, 1) the boundary of the modification period of SC-MCCH satisfies SFN mod m=0, where SFN represents the system frame number of the boundary, and m is the modification period of SC-MCCH configured in SIB20 (i.e., sc-mcch-ModificationPeriod). 2) The radio frame for scheduling SC-MCCH satisfies: SFN mod mcch-RepetitionPeriod=mcch-Offset, where SFN represents the system frame number of the radio frame, mcch-RepetitionPeriod represents the repetition period of SC-MCCH, and mcch-Offset represents the offset of SC-MCCH. 3) The subframe for scheduling SC-MCCH is indicated by sc-mcch-Subframe.

[0058] SC-MCCH is scheduled through the Physical Downlink Control Channel (PDCCH). On the one hand, a new Radio Network Temporary Identity (RNTI), namely the Single Cell RNTI (SC-RNTI), is introduced to identify the PDCCH (such as SC-MCCHPDCCH) used to schedule SC-MCCH. Optionally, the SC-RNTI is fixed to FFFC. On the other hand, a new RNTI, namely the Single Cell Notification RNTI (SC-N-RNTI), is introduced to identify the PDCCH (such as the notification PDCCH) used to indicate the change notification of SC-MCCH. Optionally, the SC-N-RNTI is fixed to FFFB; further, one of the 8 bits of DCI 1C can be used to indicate the change notification. In LTE, the configuration information of SC-PTM is based on the SC-MCCH configured by SIB20, and then the SC-MCCH configures the SC-MTCH, which is used to transmit service data.

[0059] Specifically, SC-MCCH only transmits one message (i.e., SCPTMConfiguration), which is used to configure the configuration information of SC-PTM. The configuration information of SC-PTM includes: Temporary Mobile Group Identity (TMGI), session ID, Group RNTI (G-RNTI), Discontinuous Reception (DRX) configuration information, and SC-PTM service information of neighboring cells. It should be noted that SC-PTM in R13 does not support the Robust Header Compression (ROHC) function.

[0060] The downlink discontinuous reception of SC-PTM is controlled by the following parameters: onDurationTimerSCPTM, drx-InactivityTimerSCPTM, SC-MTCH-SchedulingCycle, and SC-MTCH-SchedulingOffset.

[0061] When [(SFN*10)+subframe number]modulo(SC-MTCH-SchedulingCycle)=SC-MTCH-SchedulingOffset is satisfied, the timer onDurationTimerSCPTM is started;

[0062] When receiving downlink PDCCH scheduling, start the timer drx-InactivityTimerSCPTM;

[0063] Downlink SC-PTM services are received only when the timer onDurationTimerSCPTM or drx-InactivityTimerSCPTM is running.

[0064] SC-PTM service continuity uses the MBMS service continuity concept based on SIB15, namely the "SIB15 + MBMS Interest Indication" approach. Service continuity for idle terminal devices is based on the concept of frequency priority.

[0065] In the technical solution of the embodiment of the present application, a new SIB (called the first SIB) is defined. The first SIB includes the configuration information of the first MCCH. Here, the first MCCH is the control channel of the MBMS service. In other words, the first SIB is used to configure the configuration information of the control channel of NRMBMS. Optionally, the control channel of NR MBMS can also be called NR MCCH (that is, the first MCCH).

[0066] Furthermore, the first MCCH is used to carry the first signaling. The embodiment of the present application does not limit the name of the first signaling. For example, the first signaling is signaling A. The first signaling includes configuration information of at least one first MTCH. Here, the first MTCH is a service channel (also called a data channel or a transport channel) of the MBMS service. The first MTCH is used to transmit MBMS service data (such as NR MBMS service data). In other words, the first MCCH is used to configure configuration information of the service channel of the NR MBMS. Optionally, the service channel of the NR MBMS may also be called the NR MTCH (i.e., the first MTCH).

[0067] Specifically, the first signaling is used to configure a NR MBMS service channel, service information corresponding to the service channel, and scheduling information corresponding to the service channel. Furthermore, optionally, the service information corresponding to the service channel includes identification information for the service, such as a TMGI and a session ID. The scheduling information corresponding to the service channel includes, for example, the RNTI used when scheduling MBMS service data corresponding to the service channel, such as a G-RNTI and DRX configuration information.

[0068] It should be noted that the transmission of the first MCCH and the first MTCH are both based on PDCCH scheduling. The RNTI used by the PDCCH for scheduling the first MCCH uses a network-wide unique identifier, that is, a fixed value. The RNTI used by the PDCCH for scheduling the first MTCH is configured through the first MCCH.

[0069] It should be noted that the embodiments of the present application do not limit the naming of the first SIB, the first MCCH, and the first MTCH. For ease of description, the first SIB may also be referred to as SIB, the first MCCH may also be referred to as MCCH, and the first MTCH may also be referred to as MTCH. The PDCCH for scheduling MCCH (i.e., MCCHPDCCH) and the notification PDCCH are configured through the SIB, wherein the DCI carried by the MCCH PDCCH is used to schedule the PDSCH for transmitting MCCH (i.e., MCCH PDSCH). Furthermore, M PDCCHs for scheduling MTCHs (i.e., MTCH 1PDCCH, MTCH2PDCCH, ..., MTCH M PDCCH) are configured through the MCCH, wherein the DCI carried by the MTCH n PDCCH is used to schedule the PDSCH for transmitting MTCH n (i.e., MTCH n PDSCH), and n is an integer greater than or equal to 1 and less than or equal to M. MCCH and MTCH are mapped to DL-SCH, and further, DL-SCH is mapped to PDSCH, wherein MCCH and MTCH belong to logical channels, DL-SCH belongs to a transport channel, and PDSCH belongs to a physical channel.

[0070] It should be noted that the MBMS service in the above solution includes but is not limited to multicast service and groupcast service. The embodiment of the present application takes MBS service as an example for explanation, and the description of "MBS service" can also be replaced by "multicast service" or "groupcast service" or "MBMS service".

[0071] In NR, a terminal device can only receive MBS services after entering the connected state. While receiving MBS services, the terminal device also needs to receive unicast services (such as eMBB services). A terminal device will only receive service data on one BWP at a time. Therefore, the terminal device needs to switch between the MBS BWP used to receive MBS services and the dedicated BWP used to receive unicast services to ensure simultaneous reception of both types of services. To this end, the following technical solutions are proposed in the embodiments of the present application.

[0072] Figure 2 FIG. 1 is a flow chart of a BWP switching method provided in an embodiment of the present application, such as Figure 2As shown, the BWP switching method includes the following steps:

[0073] Step 201: The terminal device switches from a first BWP to a second BWP based on a first trigger indication; wherein the first BWP is a dedicated BWP for receiving unicast services, and the second BWP is an MBS BWP for receiving MBS services; or, the first BWP is an MBS BWP for receiving MBS services, and the second BWP is a dedicated BWP for receiving unicast services.

[0074] In this embodiment of the present application, the concept of MBS BWP is defined. MBS BWP is used by terminal devices to receive MBS services and by network devices to send MBS services. Here, the network device can be a base station, such as a gNB.

[0075] In the embodiment of the present application, a dedicated BWP refers to a terminal device-specific BWP (also referred to as a UE-specific BWP), which is used by the terminal device to receive unicast services and by the network device to send unicast services. Here, unicast services include but are not limited to eMBB services.

[0076] In an embodiment of the present application, the terminal device receives second configuration information, where the second configuration information includes configuration information of an MBSBWP and configuration information of at least one dedicated BWP. Further, optionally, the second configuration information is carried in RRC dedicated signaling.

[0077] For example, the network device configures the MBS BWP and at least one UE-specific BWP (hereinafter referred to as a dedicated BWP) through RRC dedicated signaling. The terminal device in the RRC connected state obtains the configuration information of the MBS BWP and at least one dedicated BWP through RRC dedicated signaling.

[0078] In an optional manner, the configuration information of the MBS BWP includes but is not limited to the time-frequency resource location of the MBS BWP, the bandwidth of the MBS BWP, the subcarrier spacing of the MBS BWP, the control resource set configuration of the MBS BWP, the search space configuration of the MBS BWP, etc.

[0079] In an optional manner, the network device configuration further configures the MBS service via RRC dedicated signaling. The terminal device in the RRC connected state obtains the configuration information of the MBS service, such as the MBS service identifier (eg, TMGI, G-RNTI) and other configuration information, via RRC dedicated signaling.

[0080] In the embodiment of the present application, the terminal device switches from the first BWP to the second BWP based on the first trigger indication. Here, the implementation of the first BWP and the second BWP is divided into two cases. The following describes how the terminal device switches from the first BWP to the second BWP based on the first trigger indication in combination with these two cases.

[0081] Case 1: The first BWP is a dedicated BWP for receiving unicast services, and the second BWP is an MBS BWP for receiving MBS services.

[0082] In this case, the terminal device switches from the currently activated dedicated BWP to the MBS BWP in the following manner.

[0083] Method 1: The terminal device starts a first timer; if the first timer times out, the terminal device switches from the first BWP to the second BWP.

[0084] In an embodiment of the present application, the terminal device receives first configuration information, the first configuration information including configuration information of the first timer, the configuration information of the first timer being used to determine the duration of the first timer. Further, optionally, the first configuration information is carried in RRC dedicated signaling.

[0085] In an optional manner, in response to the terminal device receiving the configuration information of the first timer, the terminal device starts the first timer.

[0086] In an optional manner, the moment when the terminal device starts the first timer is the moment corresponding to the first radio frame and / or the first time slot. Here, the system frame number (SFN) of the first radio frame satisfies the following formula: SFN mod T = offset, where T is the duration of the first timer or the duration of the first cycle configured on the network side, and offset is the offset value configured on the network side. The time slot number of the first time slot is configured on the network side.

[0087] In an optional manner, the terminal device starts the first timer at a time corresponding to the first radio frame and / or the first time slot. Here, the SFN of the first radio frame is configured by the network side. The time slot number of the first time slot is configured by the network side.

[0088] In one example, the terminal device receives configuration information of a first timer configured by the network side through RRC dedicated signaling, where the configuration information of the first timer includes length configuration information of the first timer. The moment when the terminal device starts the first timer may be based on the following conditions:

[0089] Condition 1: The terminal device starts the first timer after receiving the configuration information of the first timer;

[0090] Condition 2: The terminal device receives configuration information for the first timer, the first period, and the offset simultaneously. The first timer is started at a time corresponding to an SFN that satisfies the following formula: SFN mod T = offset, where T is the duration of the first timer or the duration of the first period configured by the network, and offset is the offset value configured by the network.

[0091] Condition 3: When the terminal device receives the configuration information of the first timer, it also receives the SFN and / or time slot number configured by the network side. The time corresponding to the SFN and / or time slot number is the absolute time when the terminal device starts the first timer.

[0092] In the embodiment of the present application, if the first timer times out, the terminal device automatically switches to the MBS BWP.

[0093] Method 2: After receiving the first DCI, the terminal device switches from the first BWP to the second BWP; wherein, the first DCI carries first indication information, and the first indication information is used to indicate at least one of the following: the identifier of the MBS BWP, and switching the current BWP to the MBS BWP.

[0094] In an optional manner, the first DCI further carries first scheduling information, where the first scheduling information is used to schedule the MBS service on the MBS BWP. The first indication information is further used to indicate that the scheduled BWP is the MBS BWP.

[0095] In an embodiment of the present application, the PDCCH where the first DCI is located is scrambled by C-RNTI; or, the PDCCH where the first DCI is located is scrambled by G-RNTI.

[0096] In one example, the terminal device monitors the DCI corresponding to the terminal device on the UE-specific search space (USS) on the currently activated dedicated BWP. 1) The terminal device monitors the PDCCH encrypted by the C-RNTI, and obtains the first DCI from the PDCCH, wherein the first DCI contains first indication information and no first scheduling information. The first indication information is used to indicate at least one of the following: the identifier of the MBS BWP, and switching the current BWP to the MBS BWP. Or, 2) The terminal device monitors the PDCCH encrypted by the C-RNTI, and obtains the first DCI from the PDCCH, wherein the first indication information and the first scheduling information are present. The first scheduling information is used to schedule the MBS service on the MBS BWP. The first indication information is used to indicate at least one of the following: the identifier of the MBS BWP, switching the current BWP to the MBS BWP, and the scheduled BWP is the MBS BWP.

[0097] It should be noted that the PDCCH where the first DCI is located may also be encrypted by G-RNTI instead of C-RNTI. In this case, the terminal device can also monitor the PDCCH encrypted by G-RNTI and obtain the first DCI from the PDCCH.

[0098] In the embodiment of the present application, after receiving the first DCI, the terminal device switches to the MBS BWP, and monitors the scheduling information of the MBS service and receives data of the MBS service on the MBS BWP.

[0099] Case 2: The first BWP is an MBS BWP for receiving MBS services, and the second BWP is a dedicated BWP for receiving unicast services.

[0100] In this case, the terminal device switches from the MBS BWP to the dedicated BWP in the following manner: after receiving a second DCI, the terminal device switches from the first BWP to the second BWP; wherein the second DCI carries second indication information, and the second indication information is used to indicate at least one of the following: an identifier of a target dedicated BWP, and switching the current BWP to the target dedicated BWP.

[0101] In the above solution, the target dedicated BWP refers to the default activated BWP after the terminal device leaves the MBS BWP, and the default activated BWP is configured through RRC signaling; or, the target dedicated BWP refers to the initial activated BWP configured by the network side for the terminal device.

[0102] A) In an optional manner, the PDCCH containing the second DCI is scrambled by C-RNTI.

[0103] Further, optionally, the second DCI also carries second scheduling information, where the second scheduling information is used to schedule the unicast service on the target dedicated BWP.

[0104] B) In an optional manner, the PDCCH where the second DCI is located is scrambled by the G-RNTI.

[0105] In one example, the MBS BWP is configured with a USS, and the terminal device MBS BWP can monitor the PDCCH scrambled by the C-RNTI, and obtain the second DCI from the PDCCH. The second DCI contains second indication information, and the second indication information is used to indicate at least one of the following: the identifier of the target dedicated BWP, and switching the current BWP to the target dedicated BWP. Here, the target dedicated BWP is configured through RRC signaling, for example, the default activated BWP (i.e., the target dedicated BWP) is configured after the terminal device leaves the MBS BWP through RRC signaling. Alternatively, the target dedicated BWP is the initial activated BWP configured by the network side. The terminal device switches to the target dedicated BWP according to the second DCI. Further, optionally, the second DCI may carry second scheduling information, or may not carry second scheduling information, wherein the second scheduling information is used to schedule unicast services on the target dedicated BWP.

[0106] It should be noted that, for a C-RNTI-scrambled PDCCH, the second finger information in the PDCCH will trigger a terminal device to switch from the MBS BWP to the target dedicated BWP.

[0107] In one example, the terminal device monitors the G-RNTI-scrambled PDCCH on the MBS BWP, and obtains a second DCI from the PDCCH. The second DCI contains second indication information, and the second indication information is used to indicate at least one of the following: an identifier of the target dedicated BWP, and switching the current BWP to the target dedicated BWP. Here, the target dedicated BWP is configured through RRC signaling, for example, the default activated BWP (i.e., the target dedicated BWP) is configured after the terminal device leaves the MBS BWP through RRC signaling. Alternatively, the target dedicated BWP is the initial activated BWP configured by the network side. The terminal device switches to the target dedicated BWP according to the second DCI. Further, optionally, the second DCI does not carry scheduling information for unicast services.

[0108] It should be noted that for G-RNTI scrambled PDCCH, the second finger information in the PDCCH will trigger a group of terminal devices to switch from the MBS BWP to their respective target dedicated BWP. The target dedicated BWP for each terminal device can be configured through RRC signaling or the initial activation BWP.

[0109] Reference Figure 3 , the terminal device can switch from the dedicated BWP1 (as the terminal device's current active BWP) to the MBSBWP, thereby receiving the MBS PDSCH on the MBS BWP, which is used to carry the MBS service. The terminal device can also switch from the MBS BWP to the dedicated BWP2, thereby receiving the unicast service on the dedicated BWP2. Here, the dedicated BWP2 can be the default active BWP after the terminal device leaves the MBS BWP configured by RRC signaling, or it can be the initial active BWP of the terminal device.

[0110] The technical solution of the embodiment of the present application proposes a mechanism for performing BWP switching when a terminal device receives MBS services and unicast services in the NR system. By performing BWP switching, the reception of two types of services is ensured at the same time, avoiding the interruption of another service due to the reception of one service.

[0111] Figure 4 Schematic diagram of the structure of the BWP switching device provided in the embodiment of the present application, which is applied to terminal equipment, such as Figure 4 As shown, the BWP switching device includes:

[0112] The switching unit 401 is configured to switch from the first BWP to the second BWP based on the first trigger indication; wherein,

[0113] The first BWP is a dedicated BWP for receiving unicast services, and the second BWP is an MBS BWP for receiving MBS services; or,

[0114] The first BWP is an MBS BWP for receiving MBS services, and the second BWP is a dedicated BWP for receiving unicast services.

[0115] In an optional manner, when the first BWP is a dedicated BWP for receiving unicast services and the second BWP is an MBS BWP for receiving MBS services,

[0116] The apparatus further includes: a starting unit 402, configured to start a first timer;

[0117] The switching unit 401 is configured to switch from the first BWP to the second BWP if the first timer times out.

[0118] In an optional manner, in response to the terminal device receiving the configuration information of the first timer, the starting unit 402 starts the first timer

[0119] In an optional manner, the moment when the starting unit 402 starts the first timer is the moment corresponding to the first radio frame and / or the first time slot.

[0120] In an optional manner, the SFN of the first radio frame satisfies the following formula: SFN mod T = offset, where T is the duration of the first timer or the duration of the first cycle configured on the network side, and offset is the offset value configured on the network side.

[0121] In an optional manner, the SFN of the first radio frame is configured on the network side.

[0122] In an optional manner, the time slot number of the first time slot is configured by the network side.

[0123] In an optional manner, the device further includes:

[0124] The receiving unit 403 is configured to receive first configuration information, where the first configuration information includes configuration information of the first timer, and the configuration information of the first timer is used to determine a duration of the first timer.

[0125] In an optional manner, the first configuration information is carried in RRC dedicated signaling.

[0126] In an optional manner, when the first BWP is a dedicated BWP for receiving unicast services and the second BWP is an MBS BWP for receiving MBS services,

[0127] The apparatus further includes: a receiving unit 403, configured to receive a first DCI;

[0128] The switching unit 401 is configured to switch from a first BWP to a second BWP after the receiving unit 403 receives the first DCI; wherein the first DCI carries first indication information, and the first indication information is used to indicate at least one of the following: an identifier of the MBS BWP, and switching the current BWP to the MBS BWP.

[0129] In an optional manner, the first DCI further carries first scheduling information, where the first scheduling information is used to schedule the MBS service on the MBS BWP. The first indication information is further used to indicate that the scheduled BWP is the MBS BWP.

[0130] In an optional manner, the PDCCH containing the first DCI is scrambled by C-RNTI; or,

[0131] The PDCCH where the first DCI is located is scrambled by the G-RNTI.

[0132] In an optional manner, when the first BWP is an MBS BWP for receiving MBS services and the second BWP is a dedicated BWP for receiving unicast services,

[0133] The apparatus further includes: a receiving unit 403, configured to receive a second DCI;

[0134] The switching unit 401 is configured to switch from the first BWP to the second BWP after the receiving unit 403 receives the second DCI; wherein the second DCI carries second indication information, and the second indication information is used to indicate at least one of the following: an identifier of a target dedicated BWP, and switching a current BWP to the target dedicated BWP.

[0135] In an optional manner, the target dedicated BWP refers to the default activated BWP after the terminal device leaves the MBS BWP, and the default activated BWP is configured through RRC signaling; or,

[0136] The target dedicated BWP refers to the initial activation BWP configured by the network side for the terminal device.

[0137] In an optional manner, the PDCCH where the second DCI is located is scrambled by C-RNTI.

[0138] In an optional manner, the second DCI further carries second scheduling information, where the second scheduling information is used to schedule unicast services on the target dedicated BWP.

[0139] In an optional manner, the PDCCH where the second DCI is located is scrambled by G-RNTI.

[0140] In an optional manner, the device further includes:

[0141] The receiving unit 403 is configured to receive second configuration information, where the second configuration information includes configuration information of an MBS BWP and configuration information of at least one dedicated BWP.

[0142] In an optional manner, the second configuration information is carried in RRC dedicated signaling.

[0143] Those skilled in the art should understand that the relevant description of the above-mentioned BWP switching device in the embodiment of the present application can be understood with reference to the relevant description of the BWP switching method in the embodiment of the present application.

[0144] Figure 5 This is a schematic structural diagram of a communication device 500 provided in an embodiment of the present application. The communication device can be a terminal device or a network device. Figure 5The communication device 500 shown includes a processor 510, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0145] Alternatively, as Figure 5 As shown, the communication device 500 may further include a memory 520. The processor 510 may call and execute a computer program from the memory 520 to implement the method in the embodiment of the present application.

[0146] The memory 520 may be a separate device independent of the processor 510 , or may be integrated into the processor 510 .

[0147] Alternatively, as Figure 5 As shown, the communication device 500 may further include a transceiver 530 , and the processor 510 may control the transceiver 530 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0148] The transceiver 530 may include a transmitter and a receiver. The transceiver 530 may further include an antenna, and the number of antennas may be one or more.

[0149] Optionally, the communication device 500 may specifically be a network device in an embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0150] Optionally, the communication device 500 may specifically be a mobile terminal / terminal device in an embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0151] Figure 6 It is a schematic structural diagram of the chip of an embodiment of the present application. Figure 6 The chip 600 shown includes a processor 610, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0152] Alternatively, as Figure 6 As shown, the chip 600 may further include a memory 620. The processor 610 may call and execute a computer program from the memory 620 to implement the method in the embodiment of the present application.

[0153] The memory 620 may be a separate device independent of the processor 610 , or may be integrated into the processor 610 .

[0154] Optionally, the chip 600 may further include an input interface 630. The processor 610 may control the input interface 630 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0155] Optionally, the chip 600 may further include an output interface 640. The processor 610 may control the output interface 640 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0156] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0157] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0158] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0159] Figure 7 700 is a schematic block diagram of a communication system 700 provided in an embodiment of the present application. Figure 7 As shown, the communication system 700 includes a terminal device 710 and a network device 720 .

[0160] Among them, the terminal device 710 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 720 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they are not repeated here.

[0161] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly implemented as a hardware decoding processor, or can be implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0162] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0163] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0164] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0165] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0166] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0167] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0168] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0169] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0170] The embodiment of the present application also provides a computer program.

[0171] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not described here.

[0172] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0173] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0174] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0175] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0176] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0177] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0178] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0179] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for switching a bandwidth portion (BWP), the method comprising: The terminal device switches from the first BWP to the second BWP based on the first trigger indication; wherein, The first BWP is a dedicated BWP for receiving unicast services, and the second BWP is an MBS BWP for receiving Multimedia Multicast Service (MBS) services; or The first BWP is an MBS BWP for receiving MBS services, and the second BWP is a dedicated BWP for receiving unicast services; the MBS service is a multicast service; Wherein, the first BWP is a dedicated BWP for receiving unicast services, and the second BWP is an MBS BWP for receiving MBS services, The terminal device switches from the first BWP to the second BWP based on the first trigger indication, including: The terminal device starts a first timer; if the first timer times out, the terminal device switches from the first BWP to the second BWP; wherein, the moment when the terminal device starts the first timer is the moment corresponding to the first radio frame; the system frame number SFN of the first radio frame satisfies the following formula: SFN mod T = offset, wherein T is the duration of the first timer or the duration of the first cycle configured on the network side, and offset is the offset value configured on the network side; or, After receiving the first downlink control information DCI, the terminal device switches from the first BWP to the second BWP; wherein the first DCI carries first indication information, and the first indication information is used to indicate at least one of the following: the identifier of the MBS BWP, and switching the current BWP to the MBS BWP.

2. The method according to claim 1, wherein The moment when the terminal device starts the first timer is also the moment corresponding to the first time slot.

3. The method according to claim 1, wherein The SFN of the first radio frame is also configured on the network side.

4. The method according to claim 2, wherein: The timeslot number of the first timeslot is configured on the network side.

5. The method according to any one of claims 1 to 3, wherein The method further comprises: The terminal device receives first configuration information, where the first configuration information includes configuration information of the first timer, and the configuration information of the first timer is used to determine the duration of the first timer.

6. The method according to claim 5, wherein: The first configuration information is carried in radio resource control RRC dedicated signaling.

7. The method according to claim 1, wherein The first DCI further carries first scheduling information, where the first scheduling information is used to schedule the MBS service on the MBS BWP. The first indication information is further used to indicate that the scheduled BWP is the MBS BWP.

8. The method according to claim 7, wherein: The physical downlink control channel PDCCH where the first DCI is located is scrambled by a cell radio network temporary identifier C-RNTI; or, The PDCCH where the first DCI is located is scrambled by a group radio network temporary identifier G-RNTI.

9. The method according to claim 1, wherein In the case where the first BWP is an MBS BWP for receiving MBS services and the second BWP is a dedicated BWP for receiving unicast services, The terminal device switches from the first BWP to the second BWP based on the first trigger indication, including: After receiving the second DCI, the terminal device switches from the first BWP to the second BWP; wherein the second DCI carries second indication information, and the second indication information is used to indicate at least one of the following: an identifier of the target dedicated BWP, and switching the current BWP to the target dedicated BWP.

10. The method according to claim 9, wherein: The target dedicated BWP refers to the default activated BWP after the terminal device leaves the MBS BWP, and the default activated BWP is configured through RRC signaling; or, The target dedicated BWP refers to the initial activation BWP configured by the network side for the terminal device.

11. The method according to claim 9 or 10, wherein: The PDCCH where the second DCI is located is scrambled by the C-RNTI.

12. The method according to claim 11, wherein The second DCI also carries second scheduling information, where the second scheduling information is used to schedule the unicast service on the target dedicated BWP.

13. The method according to claim 9 or 10, wherein: The PDCCH where the second DCI is located is scrambled by the G-RNTI.

14. The method according to any one of claims 1 to 4, 6 to 10, and 12, wherein The method further comprises: The terminal device receives second configuration information, where the second configuration information includes configuration information of an MBS BWP and configuration information of at least one dedicated BWP.

15. The method according to claim 14, wherein The second configuration information is carried in RRC dedicated signaling.

16. A BWP switching device, applied to a terminal device, comprising: The switching unit is configured to switch from the first BWP to the second BWP based on the first trigger indication; wherein, The first BWP is a dedicated BWP for receiving unicast services, and the second BWP is an MBSBWP for receiving MBS services; or, The first BWP is an MBS BWP for receiving MBS services, and the second BWP is a dedicated BWP for receiving unicast services; the MBS service is a multicast service; Wherein, the first BWP is a dedicated BWP for receiving unicast services, and the second BWP is an MBS BWP for receiving MBS services, The apparatus further includes: a starting unit, configured to start a first timer; wherein the time at which the first timer is started is a time corresponding to a first radio frame; a system frame number SFN of the first radio frame satisfies the following formula: SFN mod T = offset, wherein T is a duration of the first timer or a duration of a first cycle configured on the network side, and offset is an offset value configured on the network side; The switching unit is configured to switch from the first BWP to the second BWP if the first timer times out; or The apparatus further includes: a receiving unit, configured to receive first downlink control information DCI; The switching unit is configured to switch from the first BWP to the second BWP after the receiving unit receives the first DCI; wherein the first DCI carries first indication information, and the first indication information is used to indicate at least one of the following: an identifier of the MBS BWP, and switching the current BWP to the MBS BWP.

17. The device according to claim 16, wherein The time when the starting unit starts the first timer is also the time corresponding to the first time slot.

18. The device according to claim 17, wherein The SFN of the first radio frame is also configured on the network side.

19. The device according to claim 17, wherein The timeslot number of the first timeslot is configured on the network side.

20. The device according to any one of claims 16 to 18, wherein The device further comprises: The receiving unit is configured to receive first configuration information, where the first configuration information includes configuration information of the first timer, and the configuration information of the first timer is used to determine the duration of the first timer.

21. The device according to claim 20, wherein The first configuration information is carried in RRC dedicated signaling.

22. The apparatus according to claim 16, wherein The first DCI further carries first scheduling information, where the first scheduling information is used to schedule the MBS service on the MBS BWP. The first indication information is further used to indicate that the scheduled BWP is an MBSBWP.

23. The device according to claim 22, wherein The PDCCH containing the first DCI is scrambled by the C-RNTI; or, The PDCCH where the first DCI is located is scrambled by the G-RNTI.

24. The apparatus according to claim 16, wherein In the case where the first BWP is an MBS BWP for receiving MBS services and the second BWP is a dedicated BWP for receiving unicast services, The apparatus further includes: a receiving unit, configured to receive a second DCI; The switching unit is configured to switch from the first BWP to the second BWP after the receiving unit receives the second DCI; wherein the second DCI carries second indication information, and the second indication information is used to indicate at least one of the following: an identifier of a target dedicated BWP, and switching the current BWP to the target dedicated BWP.

25. The apparatus according to claim 24, wherein The target dedicated BWP refers to the default activated BWP after the terminal device leaves the MBS BWP, and the default activated BWP is configured through RRC signaling; or, The target dedicated BWP refers to the initial activation BWP configured by the network side for the terminal device.

26. The device according to claim 24 or 25, wherein The PDCCH where the second DCI is located is scrambled by the C-RNTI.

27. The device according to claim 26, wherein The second DCI also carries second scheduling information, where the second scheduling information is used to schedule the unicast service on the target dedicated BWP.

28. The device according to claim 24 or 25, wherein The PDCCH where the second DCI is located is scrambled by the G-RNTI.

29. The device according to any one of claims 16 to 19, 21 to 25, and 27, wherein The device further comprises: The receiving unit is configured to receive second configuration information, where the second configuration information includes configuration information of an MBS BWP and configuration information of at least one dedicated BWP.

30. The apparatus according to claim 29, wherein The second configuration information is carried in RRC dedicated signaling.

31. A terminal device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 15.

32. A chip comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1 to 15.

33. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 15.

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