CN114205754A

CN114205754A - BWP switching method and terminal

Info

Publication number: CN114205754A
Application number: CN202010983487.5A
Authority: CN
Inventors: 李娜; 潘学明
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2022-03-18
Anticipated expiration: 2040-09-17
Also published as: CN114205754B

Abstract

The embodiment of the application discloses a bandwidth part BWP switching method and a terminal, which can solve the problem that the terminal can not flexibly receive MBS service because the switching can not be carried out aiming at MBS BWP of broadcast multicast service in the related technology. The method comprises the following steps: the terminal switches from the first BWP to the second BWP under the condition that the switching condition is met; wherein at least one of the first BWP and the second BWP is an MBS BWP for MBS downlink transmission.

Description

BWP switching method and terminal

Technical Field

The present application belongs to the field of communication technologies, and in particular, to a BandWidth Part (BWP) switching method and a terminal.

Background

In a New Radio (NR) 5G system, a cell supports a system bandwidth of 400MHz at maximum to support a larger system and user throughput, which is much larger than a system bandwidth of 20MHz at maximum in a Long Term Evolution (LTE) system. However, supporting such a large system bandwidth is a great challenge for terminal implementation and is not beneficial for low-cost terminal implementation, so the 5G NR system also supports dynamic flexible bandwidth allocation, and divides the system bandwidth into multiple BWPs to support access of narrowband end users or end users in power-saving mode.

In the related art, unicast downlink traffic reception is supported, and the configuration of BWP (unicast BWP) is terminal-specific, i.e., each terminal may have different unicast BWP configurations. However, for the receiving of a Broadcast Multicast Service (MBS) Service, a group of terminals need to receive downlink transmission on the same frequency domain resource, so it may be necessary to define an MBS BWP for receiving the MBS Service in the future.

The BWP switching method in the related art is only applicable to switching between unicast BWPs and is not applicable to MBS BWP, which results in that the terminal cannot flexibly receive MBS services. Therefore, it is necessary to provide a BWP switching scheme related to MBS BWP.

Disclosure of Invention

The embodiments of the present application provide a BWP switching method and a terminal, which can solve the problem that the MBS BWP cannot be switched in the related art, so that the terminal cannot flexibly receive MBS services.

In a first aspect, a BWP handover method is provided, where the method includes: the terminal switches from the first BWP to the second BWP under the condition that the switching condition is met; wherein at least one of the first BWP and the second BWP is an MBS BWP for MBS downlink transmission of broadcast multicast service.

In a second aspect, a terminal is provided, including: a switching module, configured to switch from a first BWP to a second BWP if a switching condition is satisfied; wherein at least one of the first BWP and the second BWP is an MBS BWP for MBS downlink transmission of broadcast multicast service.

In a third aspect, a terminal is provided, the terminal comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the method according to the first aspect.

In a fourth aspect, there is provided a readable storage medium on which is stored a program or instructions which, when executed by a processor, implements the method of the first aspect.

In a fifth aspect, a computer program product is provided, the computer program product comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the method according to the first aspect.

In a sixth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a program or instructions to implement the method according to the first aspect.

In the embodiment of the present application, the terminal performs a handover from the first BWP to the second BWP when the handover condition is satisfied, for example, performs a handover from the MBS BWP to the unicast BWP, performs a handover from the unicast BWP to the MBS BWP, and performs a handover from one MBS BWP to another MBS BWP, so that the terminal can flexibly perform BWP handover, and further flexibly receive MBS services, thereby improving communication efficiency.

Drawings

Fig. 1 is a block diagram of a wireless communication system according to one embodiment of the present application;

fig. 2 is a schematic flow chart diagram of a BWP handover method according to one embodiment of the present application;

FIG. 3 is a schematic diagram of a temporal configuration of a set of search spaces according to an embodiment of the present application;

FIG. 4 is a schematic time domain configuration diagram of a DL SPS in accordance with one embodiment of the present application;

FIG. 5 is a schematic diagram of a configuration of unicast BWPs and MBS BWPs, according to one embodiment of the present application;

fig. 6 is a diagram illustrating a specific application of the BWP switching method according to an embodiment of the present application;

fig. 7 is a diagram illustrating a specific application of the BWP switching method according to an embodiment of the present application;

FIG. 8 is a block diagram of a terminal according to one embodiment of the present application;

FIG. 9 is a schematic block diagram of a communication device according to one embodiment of the present application;

fig. 10 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived from the embodiments given herein by a person of ordinary skill in the art are intended to be within the scope of the present disclosure.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used are interchangeable under appropriate circumstances such that embodiments of the application can be practiced in sequences other than those illustrated or described herein, and the terms "first" and "second" used herein generally do not denote any order, nor do they denote any order, for example, the first object may be one or more. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described techniques can be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, and the techniques may also be applied to applications other than NR system applications, such as 6 th generation (6 th generation) NR systems^thGeneration, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: bracelets, earphones, glasses and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, wherein the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a next generation node B (gnb), a home node B, a home evolved node B (hbo), a WLAN access Point, a WiFi node, a Transmission Receiving Point (TRP), or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but the specific type of the Base Station is not limited.

The BWP handover method and terminal provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

As shown in fig. 2, an embodiment of the present application provides a BandWidth Part (BWP) switching method 200, which may be performed by a terminal, in other words, by software or hardware installed in the terminal, and includes the following steps.

S202: the terminal switches from a first BWP to a second BWP when a switching condition is satisfied, and at least one of the first BWP and the second BWP is an MBS BWP for Broadcast Multicast Service (MBS) downlink transmission.

Generally speaking, a terminal can only work on one downlink BWP at the same time, in other words, the terminal can only activate one downlink BWP at the same time, and after the terminal is switched from a first BWP to a second BWP, the first BWP is in a deactivated state and the second BWP is in an activated state; in the latest period of time before the terminal device switches from the first BWP to the second BWP, the first BWP is in an activated state, and the second BWP is in a deactivated state; or the terminal may activate more than one downlink BWP at the same time, but the UE can only receive downlink data on one BWP, after the terminal switches from the first BWP to the second BWP, the terminal cannot receive the channel or signal transmitted on the first BWP, may receive the channel or signal transmitted on the second BWP, and may receive the channel or signal transmitted on the first BWP and may not receive the channel or signal transmitted on the second BWP within the latest period of time before the terminal switches from the first BWP to the second BWP.

The meeting of the handover condition in this embodiment may be that the terminal ends after the target downlink transmission on the first BWP (including the end time of the target downlink transmission) or is about to end; the terminal may also receive Downlink Control Information (DCI), where the DCI may be used to instruct the terminal to switch from the first BWP to the second BWP; but also a target timer timeout, etc.

In various embodiments of this specification, the first BWP may be an MBS BWP, and the second BWP may be a unicast BWP for unicast downlink transmission, in this example, the terminal is configured with one or more MBS BWPs; or, the first BWP may be a unicast BWP for unicast downlink transmission, and the second BWP is an MBS BWP, in this example, the terminal is configured with one or more MBS BWPs; or, the terminal is configured with a plurality of MBS BWPs, the first BWP is one MBS BWP, and the second BWP is another MBS BWP.

It should be noted that, for convenience of differentiation, in the embodiments of the present specification, a BWP for MBS downlink transmission is referred to as MBS BWP, and a BWP for unicast downlink transmission is referred to as unicast BWP, and actually, these BWPs may be replaced by other similar technical terms, for example, MBS BWP may also be referred to as first BWP for short, unicast BWP may also be referred to as second BWP for short, and so on. It should be noted that, in the embodiments of the present specification, MBS downlink transmission mainly indicates a transmission mode of sending information to multiple receivers through the same physical resource, that is, a broadcast/multicast transmission mode, which may also be called point to multipoint transmission (PTM). The BWP for MBS downlink transmission refers to a BWP mainly used for MBS downlink transmission, and other information, such as system messages, may also be transmitted on the BWP. In the embodiments of the present description, the unicast downlink transmission mainly uses a transmission mode of sending information to a receiver through a specific physical resource, and may also be called Point To Point (PTP). The BWP for unicast downlink transmission refers to a BWP mainly used for unicast downlink transmission, and other information, such as system messages, may also be transmitted on the BWP.

In the BWP switching method provided in the embodiment of the present application, the terminal switches from the first BWP to the second BWP when the switching condition is satisfied, for example, switches from the MBS BWP to the unicast BWP, switches from the unicast BWP to the MBS BWP, and switches from one MBS BWP to another MBS BWP, so that the terminal can flexibly perform BWP switching, and further flexibly receive MBS services, thereby improving communication efficiency.

The embodiment can realize more flexible BWP switching, so that the terminal can receive unicast transmission and multicast/multicast transmission more efficiently and flexibly.

The embodiment 100 refers to a case where a terminal performs a handover from a first BWP to a second BWP when a handover condition is satisfied, and the handover condition has a plurality of implementation manners, and according to the difference of the handover condition, the following description will be divided into several different embodiments for description.

In one embodiment, the handover condition is satisfied as: after or about to end the target downlink transmission on the first BWP. In this way, the switching from the first BWP to the second BWP by the terminal in the embodiment 100 when the switching condition is satisfied includes: and the terminal switches from the first BWP to the second BWP after the target downlink transmission on the first BWP is finished or is about to be finished.

In practice, the first BWP and the second BWP in this embodiment may also each be a unicast BWP or other type of BWP. This embodiment may, for example, in a case where both the first BWP and the second BWP are unicast BWPs, perform BWP switching according to the time-domain position of the target downlink transmission on the first BWP and the second BWP, so that the terminal can receive not only the target downlink transmission on the first BWP but also the target downlink transmission on the second BWP. Specifically, for example, after the terminal receives the first target downlink transmission on the first BWP (it is assumed that the terminal has received the first target downlink transmission at the first time), the terminal switches to the second BWP to receive the second target downlink transmission when the second target downlink transmission closest to the first time is on the second BWP; after the second target downlink transmission reception is completed (assuming that the second time is completed): if the latest third target downlink transmission after the second moment is on the second BWP, the terminal does not perform BWP switching and still receives the third target downlink transmission on the second BWP; or, if the latest third target downlink transmission after the second time is on the first BWP, the terminal switches to the first BWP to receive the third target downlink transmission.

Optionally, the target downlink transmission includes at least one of: a configured Physical Downlink Control Channel (PDCCH) monitoring opportunity (monitoring), a configured Physical Downlink Shared Channel (PDSCH) transmission, a scheduled PDSCH transmission, a Channel State Information-Reference Signal (CSI-RS) transmission, and a Synchronization Signal and PBCH block (SSB) transmission.

In a first example, the ending time of the target downlink transmission on the first BWP is T1, the starting time of the latest downlink transmission on the second BWP after the time T1 is T2(T2 is no earlier than T1), and the switching from the first BWP to the second BWP when the target downlink transmission on the first BWP ends or is about to end includes: in the case that the time interval between the time T1 and the time T2 is greater than or equal to X, the terminal switches from the first BWP to the second BWP at the time T1, or at the time (T2-X), or at any time between the time T1 and the time (T2-X), wherein X is the time length required for BWP switching.

This example has enough time to perform BWP handoff, and the process of BWP handoff does not affect downstream reception on the first BWP and the second BWP. The terminal may complete the switch from the first BWP to the second BWP at time T2 at the latest to receive the downstream transmission on the second BWP.

In a second example, the ending time of the target downlink transmission is T1, the starting time of the latest downlink transmission after the time T1 on the second BWP is T2, and the switching, by the terminal, from the first BWP to the second BWP when the target downlink transmission on the first BWP ends or is about to end includes: in case that the time interval between the time T1 and the time T2 is less than X, the terminal switches from the first BWP to the second BWP at the time (T2-X), or at the time T1, wherein X is the duration of BWP switching. In other examples, the terminal may not perform BWP handover when the time interval between the time T1 and the time T2 is less than X.

This example may affect downstream reception on the first BWP or the second BWP due to insufficient time to implement BWP handoff.

In the second example above, the terminal switches from the first BWP to the second BWP at time (T2-X), where the terminal does not expect to receive the downlink transmission between time (T2-X) and time T1 on the first BWP; or the terminal switches from the first BWP to the second BWP at the time T1, wherein the terminal does not expect to receive the downlink transmission between the time T2 to the time (T1+ X) on the second BWP. It should be noted that the terminal does not expect to receive the downlink transmission from the time point on the first BWP (T2-X) to the time point T1, which may indicate that the terminal may not receive the downlink transmission from the time point on the first BWP (T2-X) to the time point T1, or the terminal is not required to receive the downlink transmission from the time point on the first BWP (T2-X) to the time point T1. The terminal does not expect to receive the downlink transmission between the time T2 and the time (T1+ X) on the second BWP, which may indicate that the terminal does not receive the downlink transmission between the time T2 and the time (T1+ X) on the second BWP or that the terminal is not required to receive the downlink transmission between the time T2 and the time (T1+ X) on the second BWP.

Based on the second example, the foregoing embodiments may further include the following steps: the terminal determines to switch from the first BWP to the second BWP at time (T2-X), or at time T1, based on at least one of:

1) BWP identification. For example, it is determined according to the size of the BWP identification number that, for example, the BWP identification number is smaller with higher priority, i.e., if the identification number (e.g., index or ID) of the second BWP is smaller than the identification number of the first BWP, the UE performs handover at time T2-X, whereas if the identification number (e.g., index or ID) of the second BWP is larger than the identification number of the first BWP, the UE performs handover at time T1.

2) And configuring high-layer signaling. For example, the example may instruct the terminal to switch from the first BWP to the second BWP at time (T2-X) via Radio Resource Control (RRC) or at time T1.

3) And receiving the priority of the corresponding service in a downlink. For example, if the priority of the downlink reception corresponding service on the first BWP is higher than the priority of the downlink reception corresponding service on the second BWP, the terminal switches from the first BWP to the second BWP at time T1; the terminal switches from the first BWP to the second BWP at time (T2-X) if the priority of the downlink reception of the corresponding traffic on the first BWP is lower than the priority of the downlink reception of the corresponding traffic on the second BWP.

4) A downlink reception type. For example, when the priority of downlink reception (e.g. SSB or paging) on the second BWP is higher than that of the current downlink reception on the first BWP, the terminal switches from the first BWP to the second BWP at time (T2-X); if the priority of downlink reception (such as semi-persistent scheduling (SPS) PDSCH) on the second BWP is lower than the priority of current downlink reception of the first BWP, the terminal switches from the first BWP to the second BWP at time T1. The priority of the downlink receiving type can be predefined or higher-layer configuration, for example, the priority order is SSB > paging > CORESET0> CSI-RS > CORESET other than CORESET0> dynamically scheduled PDSCH > semi-persistently scheduled SPS PDSCH, or the semi-statically configured downlink receiving priority is greater than the dynamically scheduled downlink receiving, wherein the semi-statically configured downlink receiving can be PDCCH detection opportunity or SSB receiving, and the like.

5) Control Resource SET (CORESET) type and/or priority. For example, the priority of the core set0 is higher than the priority of other core sets or downlink reception, or the core set with a small period (or the core set smaller than a certain threshold) is higher than the core set with a large period or the like, or the priority of each core set is configured at a high layer, and the like. For example, if the priority of downlink reception of the first BWP is greater than that of the second BWP, the UE switches at time T1, whereas the UE switches at time T2-X.

6) Type and/or priority of Search Space (SS). For example, the common search space CSS has a higher priority than the UE-specific search space USS, or the periodic small search space is larger than the periodic large search space, or the higher level configures the priority of each search space, etc. For example, if the priority of downlink reception of the first BWP is greater than that of the second BWP, the UE switches at time T1, whereas the UE switches at time T2-X.

It is understood that 1) to 6) above do not conflict with each other in implementation, and therefore, in other examples, at least two of 1) to 6) above may be combined to determine whether to switch from the first BWP to the second BWP at the time (T2-X) or at the time T1.

Optionally, the switching from the first BWP to the second BWP by the terminal mentioned in the foregoing embodiments when the switching condition is satisfied includes: between two target downlink transmissions on a first BWP (e.g., between two PDCCH monitoring opportunities), the terminal switches from the first BWP to a second BWP if there is a downlink transmission on the second BWP.

In another example, between two target downlink transmissions on a first BWP (e.g., between two PDCCH monitoring opportunities), when there is no downlink transmission on the second BWP, the terminal does not need to perform BWP handover, i.e., the terminal does not perform handover from the first BWP to the second BWP.

The terminal mentioned in the foregoing embodiments switches from the first BWP to the second BWP when the switching condition is satisfied, and optionally, before the terminal switches from the first BWP to the second BWP, the method may further include the following steps: the terminal determines the second BWP from unicast BWPs used for unicast downlink transmission and N MBS BWPs, or determines the second BWP from M MBS BWPs according to at least one of the following conditions:

1) BWP identification.

2) And configuring high-layer signaling.

3) And receiving the priority of the corresponding service in a downlink.

4) A downlink reception type.

5) The type and/or priority of the resource set is controlled.

6) Type and/or priority of the search space.

Wherein, the unicast BWP and the N MBS BWPs have downlink transmission simultaneously; or downlink transmission exists on M MBS BWPs at the same time, N is more than or equal to 1, M is more than or equal to 2, and N and M are integers.

In this embodiment, the "simultaneous" existence of downlink transmission does not mean absolute time, but means that there is partial or full overlap between two downlink receptions, or the time interval between two downlink receptions is less than the time required for BWP handover, where the end symbols or the start symbols of multiple downlink transmissions are not necessarily identical.

The terminal mentioned in the foregoing embodiments switches from the first BWP to the second BWP when the switching condition is satisfied, and optionally, before the terminal switches from the first BWP to the second BWP, the method may further include the following steps: the terminal determines whether to switch from the first BWP to the second BWP according to at least one of the following conditions when downlink transmission exists on the first BWP and the second BWP simultaneously:

1) BWP identification;

2) configuring high-level signaling;

3) receiving the priority of the corresponding service in a downlink manner;

4) a downlink reception type;

5) controlling the type and/or priority of the resource set;

6) type and/or priority of the search space.

The detailed description of this embodiment may refer to the description of the previous embodiment, and in order to avoid repetition, the description is not repeated here.

It is to be understood that this embodiment refers to the case where the terminal determines "whether" to switch from the first BWP to the second BWP, and the foregoing embodiments are examples where the terminal switches from the first BWP to the second BWP.

In another embodiment, the meeting of the handover condition mentioned in embodiment 100 is: the target timer times out. In this way, the switching from the first BWP to the second BWP by the terminal in the embodiment 100 when the switching condition is satisfied includes: and the terminal switches from the first BWP to the second BWP under the condition that the target timer is overtime. The target timer in this embodiment may be used for switching from the first BWP to the second BWP if the terminal does not receive the downlink transmission for a longer time (i.e., the duration of the target timer) on the first BWP.

In this embodiment, the terminal may start the target timer after the downlink transmission on the first BWP is ended, and switch from the first BWP to the second BWP when the target timer expires.

The aforementioned handover of the terminal from the first BWP to the second BWP with the target timer includes at least one of:

1) and the terminal switches from the MBS BWP to a unicast BWP for unicast downlink transmission when the first timer expires, where the target timer in this example refers to the first timer.

2) And the terminal switches from the unicast BWP for unicast downlink transmission to the MBS BWP when the second timer expires, where the target timer in this example refers to the second timer.

3) And the terminal switches from the MBS BWP to the default BWP or the initial BWP when the third timer expires, where the target timer in this example refers to the third timer.

4) And the terminal switches from one MBS BWP to another MBS BWP under the condition that a fourth timer is overtime, wherein the target timer in the example refers to the fourth timer, and the terminal is configured with a plurality of MBS BWPs.

In one example, the terminal is configured with a plurality of MBS BWPs, and the BWP handover sequence for the handover from the first BWP to the second BWP is predefined or configured with higher layer signaling. The first BWP and the second BWP in this example may both be MBS BWP, or the first BWP in this example is MBS BWP, and the second BWP is default downlink BWP (default DL BWP) or initial downlink BWP (initial DL BWP).

In yet another embodiment, the meeting of the handover condition mentioned in embodiment 100 is: the terminal receives DCI instructing the terminal to switch from the first BWP to the second BWP. In this way, the switching from the first BWP to the second BWP by the terminal in the embodiment 100 when the switching condition is satisfied includes: the terminal switches from the first BWP to the second BWP when receiving DCI, wherein the DCI is used for indicating the terminal to switch from the first BWP to the second BWP.

Optionally, the DCI is further configured to indicate at least one of the following for the second BWP: BWP index (index) (or ID), BWP type; wherein the BWP type includes an MBS type or a unicast type.

Considering that the indexes of the unicast BWP and the MBS BWP may be the same, in the case that the DCI indicates the BWP type, the network-side device is enabled to explicitly indicate the BWP to which the terminal is to be handed over, thereby avoiding communication problems due to terminal handover errors and improving communication effectiveness.

To describe the BWP switching method provided in the embodiments of the present application in detail, the following description will be made with reference to several specific embodiments.

Example one

This embodiment introduces BWP handover based on downlink receiver opportunities (corresponding to the aforementioned target downlink transmission), such as PDCCH monitoring interference or PDSCH reception (repetition).

If a terminal (UE) is configured with a plurality of MBS listening periods periodically or is scheduled for MBS downlink reception (e.g., monitors MBS PDCCH or MBS PDSCH or CSI-RS in each period), after an MBS listening period or downlink reception end time T1, it automatically switches to unicast BWP (or referred to as unicast DL BWP). Since BWP handover requires a certain time X, then:

1. if the time interval from the current MBS listening period or downlink reception end time T1 on the MBS DL BWP to the latest signal reception start time T2 on the target unicast DL BWP (PDCCH listening or PDSCH or CSI-RS or SSB reception, etc.) is greater than or equal to X, the UE may complete BWP handover before T2 (including the time T2), ensuring that the UE can receive signals on the unicast DL BWP at the latest signal reception time on the unicast DL BWP.

2. If the time interval from the end time T1 of the current MBS listening period on the MBS DL BWP to the latest signal reception time T2 on the target unicast DL BWP is less than X, performing one of the following:

the method comprises the following steps: the UE performs switching from MBS DL BWP to unicast DL BWP in advance before time T1 (e.g., at time (T2-X)) to ensure that the UE can start receiving the signal of unicast DL BWP at time T2. Or

The method 2 comprises the following steps: the UE starts switching from MBS DL BWP to unicast DL BWP at time T1, and starts receiving the signal of unicast DL BWP later than time T2.

The method 3 comprises the following steps: the method 1 or the method 2 is determined to be adopted according to at least one of the following ways.

1) BWP identification.

2) And configuring high-layer signaling.

3) And receiving the priority of the corresponding service in a downlink.

4) And the downlink receiving type is that if the PDSCH is prior to the PDCCH, the PDCCH is prior to the CSI-RS.

5) The type and/or priority of the resource set is controlled.

6) Type and/or priority of the search space.

In this embodiment, if there is no downlink signal reception on the unicast DL BWP between two MBS listening periods or downlink receptions, the UE does not need to switch from the MBS DL BWP to the unicast DL BWP.

Example two

The UE is configured with periodic several MBS listening periods (e.g., listening to MBS PDCCH or MBS PDSCH in each period)). If the UE currently works on the unecal DL BWP, the starting time of the MBS monitoring time period on the latest MBS DL BWP is T2, and the time required by the switching of the BWPs is X, the UE switches the unecal DL BWP to the MBS DL BWP at the (T2-X) time so as to ensure that the signal on the MBS DL BWP is correctly received; or switch to MBS DL BWP at downlink reception end position T1 of unicast DL BWP, and so on.

In this embodiment, if there is no downlink signal reception on the MBS DL BWP between the two unique listening periods, the UE does not need to switch from the unique DL BWP to the MBS DL BWP.

In this embodiment, if the interval between the downlink reception end position T1 of the unicast DL BWP and the MBS listening period start time on the latest MBS DL BWP is T2 is less than X, the UE:

the method comprises the following steps: the UE performs the switching from the unicast DL BWP to the MBS DL BWP ahead of time T1 (e.g., at time (T2-X)) in advance to ensure that the receiving of the MBS DL BWP signal can be started at time T2, or

The method 2 comprises the following steps: the UE starts switching from the unicast DL BWP to the MBS DL BWP at time T1, and starts receiving the signal of the unicast DL BWP later than time T2.

1) BWP identification.

2) And configuring high-layer signaling.

3) And receiving the priority of the corresponding service in a downlink.

5) The type and/or priority of the resource set is controlled.

6) Type and/or priority of the search space.

EXAMPLE III

This embodiment introduces BWP handover based on downlink reception opportunities, such as PDCCH monitoring interference or PDSCH reception (repetition).

If the UE configures a plurality of MBS DL BWPs:

in MBS DL BWP n, the UE is configured with several periodic MBS listening periods (for example, listening to downlink receptions such as MBS PDCCH, MBS PDSCH, CSI-RS, etc. in each period), and after an MBS listening period end time T1, automatically switches to unicast DL BWP or MBS DL BWP m. Since BWP handover requires a certain time X, then:

if the time interval from the current MBS listening period end time T1 to the latest signal reception time T2 on the target unecal DL BWP or MBS DL BWP m on the MBS DL BWP n is greater than or equal to X, the UE can receive the unecal signal at the latest signal reception time on the unecal DL BWP or MBS DL BWP m.

If the time interval from the end time T1 of the current MBS listening period on the MBS DL BWP n to the latest signal reception time T2 on the target unicast DL BWP or MBS DL BWP m is less than X, then:

the method comprises the following steps: the UE performs the switching from MBS DL BWP n to Unicast DL BWP or MBS DL BWP m in advance before time T1 (e.g. at time (T2-X)) to ensure that the UE can start receiving the signal of Unicast DL BWP or MBS DL BWP m at time T2, or

The method 2 comprises the following steps: the UE starts to switch from MBS DL BWP n to Unicast DL BWP or MBS DL BWP m at the time T1, and starts to receive the signal of Unicast DL BWP or MBS DL BWP m at the time later than T2, or

1) BWP identification.

2) And configuring high-layer signaling.

3) And receiving the priority of the corresponding service in a downlink.

5) The type and/or priority of the resource set is controlled.

6) Type and/or priority of the search space.

In this embodiment, if there is no downlink signal reception on the unicast DL BWP or the MBS DL BWP m between two listening periods on the MBS DL BWP n, the UE does not need to switch from the MBS DL BWP n to the unicast DL BWP or the MBS DL BWP m.

Example four

On MBS DL BWP n, the UE is configured with periodic several MBS listening periods (e.g., listening to MBS PDCCH or MBS PDSCH in each period). If the UE is currently working on the unicast DL BWP, the starting time of the MBS listening time period on the latest MBS DL BWP n is T2, and the time required by BWP switching is X, the UE switches from the unicast DL BWP to the MBS DL BWP n at the (T2-X) time or switches to the MBS DL BWP n after the downlink receiving ending position T1 of the unicast DL BWP, so as to ensure that the signal on the MBS DL BWP n is correctly received.

EXAMPLE five

In this embodiment, when the UE needs to simultaneously receive the traffic data for unicast transmission and the traffic data for multicast/multicast transmission, the UE may be configured with unicast DL BWP (corresponding to the aforementioned unicast BWP) for unicast transmission and MBS DL BWP (corresponding to the aforementioned MBS BWP) for multicast/multicast transmission at the same time, and the UE needs to switch between the two BWPs to receive different data. The switching mode based on the timer at this time may include:

the first condition is as follows: the network side equipment configures a timer for the terminal to switch from MBS DL BWP to unicast DL BWP.

In this example, when the UE is currently operating in MBS DL BWP and BWP timer 1 times out, the UE switches to unicast DL BWP.

In this example, the timer 1 may be started after the downlink transmission on the MBS DL BWP is finished, and when the timer 1 runs and there is no downlink transmission on the MBS DL BWP, and the BWP timer 1 times out, the UE switches to the unicast DL BWP; if there is downlink transmission on the MBS DL BWP during the operation of the timer 1, the terminal may also stop the timer 1 and receive downlink transmission on the MBS DL BWP.

Case two: the network side device configures a timer, which is used for switching from a unicast DL BWP to an MBS DL BWP, or switching from the MBS DL BWP to a default downlink BWP (default DL BWP) or an initial downlink BWP (initial DL BWP).

This example is for example when the UE is currently operating in a unicast DL BWP and BWP timer 2 times out, the UE switches to MBS DL BWP.

This example is also for example when the UE is currently operating in MBS DL BWP and BWP timer 3 times out, the UE switches to default DL BWP or initial DL BWP.

Case three: the network side device configures a timer and a BWP handover sequence.

This example is for example where the UE is configured with multiple MBS DL BWPs, predefined or higher layer signaling configuring the BWP handover sequence. In a specific example, when the UE is currently operating in MBS DL BWP K and BWP timer L times out, the UE switches to unicast DL BWP, where K is the identity of the MBS DL BWP and L is the number of the timer.

EXAMPLE six

In this embodiment, a maximum of 4 DL BWPs can be configured on a serving cell, and only one DL BWP is active at a time and all other DL BWPs are inactive (inactive).

In this embodiment, a BWP indication field is included in DCI for scheduling a PDSCH or a UL grant for scheduling a PUSCH, and is used to indicate a BWP index and a BWP type where the PDSCH or PUSCH scheduled by the DCI is located; wherein the BWP type includes an MBS type or a unicast type.

It is understood that, when the unique DL BWP and the MBS DL BWP are respectively configured with the same index, for example, the unique DL BWP includes

BWP

0,1,2,3, and the MBS DL BWP includes

BWP

0, 1. The UE cannot determine whether the BWP is unicast DL BWP 0 or MBS DL BWP 0 only if the DCI indicates the BWP index, e.g., the DCI indicates that the target BWP index is 0.

The embodiment can clearly indicate the DL BWP to which the terminal is to be switched by indicating the target BWP type, such as unicast DL BWP or MBS DL BWP, thereby avoiding the communication problem caused by the terminal switching error and improving the communication effectiveness.

The BWP type may be directly indicated in DCI by a certain bit field, or may be implicitly obtained by other means.

For example, the RNTI corresponding to the PDSCH is UE-specific RNTI or group RNTI, and if the RNTI is UE-specific RNTI, it corresponds to unicast DL BWP, and if the RNTI is group DCI, it is MBS DL BWP.

For another example, in this embodiment, when the terminal supports scheduling of the multicast/multicast PDSCH using unicast DCI, the network-side device receives the PDCCH on a unicast DL BWP, and determines the BWP for receiving the PDSCH according to scheduling information of the PDCCH. If the PDCCH schedules the unicast PDSCH, the PDSCH is on unicast DL BWP; if the PDCCH schedules a multicast/multicast PDSCH, the PDSCH is on MBS DL BWP.

In this example, the UE may directly or indirectly determine the type of the PDSCH, i.e., unicast PDSCH or multicast PDSCH, according to the DCI indication or the core set/SS where the PDCCH is located. Or the network side device may indicate the BWP where the PDSCH is located (which may be direct indication or indirect indication), and if the BWP where the PDSCH is located is unicast DL BWP, the PDSCH is unicast; if the BWP is MBS DL BWP, then MBS DL BWP.

EXAMPLE seven

For unicast and multicast/multicast reception, on both unicast DL BWP and MBS DL BWP, the UE will be configured with CORESET/search space or Semi-persistent PDSCH (Semi-persistent PDSCH) or periodic CSI-RS, etc. And these configurations may determine their position at each cycle by period, offset, etc.

In this embodiment, the time domain configuration information of the search space set includes a detection period, a slot offset, a slot number, a symbol position, and a control resource set index (where the control resource set index may configure the number of symbols).

As shown in fig. 3, the detection period of the search space set is 8 slots, the slot offset is 3 slots, the number of slots is 2 slots, the control resource set index corresponds to a CORESET that occupies two OFDM symbols, and the symbol positions are OFDM symbol 0 and OFDM symbol 7 in the slot. In this example, the UE detects CORESET for symbol 0 and symbol 7 in the 3 rd slot and 4 th slot every 8 slot periods, and CORESET occupies 2 OFDM symbols in the time domain.

In this embodiment, the UE may also configure one or more Downlink (DL) Semi-Persistent Scheduling (SPS), and the time domain configuration information of the DL SPS includes a period, a slot offset, and a symbol position (a starting symbol and a symbol number).

As shown in FIG. 4, the DL SPS period is 10 slots, the slot offset is 6 slots, the starting symbol in a slot is symbol 5, the number of symbols is 5.

Fig. 5 is a schematic configuration diagram of unicast BWP (unicast DL BWP) and MBS DL BWP (MBS BWP for short).

According to the descriptions of fig. 3 and fig. 4, in each DL BWP, the network side device may configure the corresponding core set/SS and DL SPS (active) according to the respective requirements. The UE may determine the location where the PDCCH monitoring interference or SPS PDSCH (SPS PDSCH that has been activated) is received according to the configuration information of the network side device.

As shown in fig. 6, which is a schematic diagram of determining BWP handover according to PDCCH monitoring interference and PDSCH reception, a UE may start to handover to a target BWP immediately after a downlink reception end time of a current BWP, or may switch to the target BWP before downlink reception of the target BWP starts, so as to ensure downlink reception of the target BWP.

In fig. 6, the UE starts to operate on MBS DL BWP, and detects PDCCH on PDCCH monitoring scheduling 1 of MBS DL BWP, and the UE detects PDCCH schedules PDSCH1 on MBS DL BWP.

After the UE receives the PDSCH1 on the MBS DL BWP, since there will be no downlink transmission in the MBS DL BWP for a next period of time (it can be determined according to the configuration information and the scheduling information that the UE has no downlink reception between the end of PDSCH1 and PDCCH monitoring scheduling 2 on the MBS), and the latest downlink receiver after the PDSCH1 is PDCCH monitoring scheduling 1 on the uplink DL BWP, the UE needs to switch to the uplink DL BWP before PDCCH monitoring scheduling 1 of the uplink DL BWP to detect whether there is a PDCCH transmission on the PDCCH monitoring scheduling 1 on the uplink DL BWP.

In fig. 6, in PDCCH monitoring interference 1 of the unicast DL BWP, the UE detects the PDCCH and receives PDSCH1 on the unicast DL BWP scheduled by the UE (in fig. 6, the UE needs to receive SPS PDSCH between PDCCH monitoring interference 1 and PDSCH1 on the unicast DL BWP), and after receiving PDSCH1 on the unicast DL BWP, the nearest downlink receiver will be PDCCH monitoring interference 2 of the MBS DL BWP, so the UE will switch to the MBS DL BWP, receive the PDCCH on the MBS DL BWP, and schedule PDSCH2 on the MBS DL BWP.

In fig. 6, the PDSCH2 of MBS DL BWP overlaps (partially overlaps) with the PDCCH monitoring interference 2 of unicast DL BWP, and since the UE can only receive information transmitted by one BWP at the same time, the UE can only select one reception between PDSCH2 and PDCCH monitoring interference 2, for example, the UE preferentially receives the dynamically scheduled PDSCH, so the UE will not switch BWP, i.e. not detect the PDCCH transmitted in PDCCH monitoring interference 2 of unicast DL BWP, but continue to receive PDSCH2 on MBS DL BWP.

After the UE receives the PDSCH2 on the MBS DL BWP, the latest downlink receiver shall be the SPS PDSCH on the unicast DL BWP, so the UE shall switch to receive the SPS PDSCH of the unicast DL BWP on the unicast DL BWP before the SPS PDSCH starting symbol.

After SPS PDSCH reception, the latest downlink reception is PDCCH monitoring interference 3 still being the unicast DL BWP, so the UE will remain on the unicast DL BWP, and the UE does not detect PDCCH on PDCCH monitoring interference 3 on the unicast DL BWP.

Because the interval time between the ending symbol of the PDCCH monitoring envelope 3 and the starting symbol of the PDCCH monitoring envelope 3 of the MBS DL BWP is less than the time required by the switching of the BWP, the UE can not be switched to the MBS DL BWP; or, the UE switches to MBS DL BWP before PDCCH monitoring interference 3 ending symbol on unicast DL BWP to receive the transmission of MBS DL BWP on PDCCH monitoring interference 3; or, whether to switch is determined by the configuration of the network side equipment and other modes; alternatively, the determination of whether to switch to MBS DL BWP is implemented by the UE.

In case that the terminal switches to MBS DL BWP, the terminal may also need to switch to unicast DL BWP before PDCCH monitoring interference 4 starting symbol of unicast DL BWP.

In the method, the UE performs BWP switching according to downlink transmission without DCI (Downlink control information) for indication or waiting for the timeout of a target timer to switch the BWP, so that the BWP can be switched quickly, and the efficiency of multicast/multicast and unicast transmission is improved.

Example eight

As shown in fig. 7, which is a schematic diagram of determining BWP handover according to PDCCH monitoring interference and PDSCH reception, a UE may start to handover to a target BWP immediately after a downlink reception end time of a current BWP, or may switch to the target BWP before downlink reception of the target BWP starts, so as to ensure downlink reception of the target BWP.

As shown in fig. 7, the UE in this embodiment is configured with two MBS DL BWPs and one unicast DL BWP. In fig. 7, the UE starts to operate in the unicast DL BWP, after the PDSCH1 on the unicast DL BWP ends, the UE has downlink transmissions on both the MBS DL BWP1 and the MBS DL BWP2 (i.e. the PDCCH monitoring interference 1 on the MBS DL BWP1 and the SPS PDSCH1 on the MBS DL BWP 2), and because the time domains of the two overlap, the UE can only receive on one BWP at the same time, and therefore the UE can only select to switch to one of the MBS DL BWP1 and the MBS DL BWP 2.

For example, the UE selects BWP with small ID according to BWP ID, i.e. MBS DL BWP1, the UE switches to MBS DL BWP1 and receives PDCCH on PDCCH monitoring 1, which schedules PDSCH1, after the UE receives PDSCH1, the UE receives SPS PDSCH2 as uplink DL BWP, so the UE switches to uplink DL BWP, the UE receives SPS PDSCH2 on uplink DL BWP and detects PDCCH sent by PDCCH monitoring occase 2, the UE does not detect PDCCH on PDCCH monitoring occase 2 of uplink DL BWP, and then the UE switches to MBS DL BWP2 to detect PDCCH monitoring occase 1 on MS DL BWP2, and the UE does not detect PDCCH on PDCCH monitoring occase 1 of MBS BWP2, so the UE switches to MBS DL BWP1 to receive downlink transmission on PDCCH monitoring case 2.

It should be noted that, in the BWP switching method provided in the embodiment of the present application, the execution subject may be a terminal, or a control module in the terminal for executing the BWP switching method. In the embodiment of the present application, a method for a terminal to perform BWP handover is taken as an example to describe the terminal provided in the embodiment of the present application.

Fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application, and as shown in fig. 8, the terminal 800 includes:

a switching module 802, configured to switch from a first BWP to a second BWP if a switching condition is satisfied; wherein at least one of the first BWP and the second BWP is an MBS BWP for MBS downlink transmission of broadcast multicast service.

Optionally, as an embodiment, the switching module 802 is configured to: and switching from the first BWP to the second BWP when the target downlink transmission on the first BWP is finished or is about to be finished.

Optionally, as an embodiment, the ending time of the target downlink transmission is T1, the starting time of the latest downlink transmission after the T1 time on the second BWP is T2, and the switching module 802 is configured to: switching from the first BWP to the second BWP at the time T1, or at a time (T2-X), or at any time between the time T1 and the time (T2-X), in a case where a time interval between the time T1 and the time T2 is greater than or equal to X, where X is a length of time required for BWP switching.

Optionally, as an embodiment, the ending time of the target downlink transmission is T1, the starting time of the latest downlink transmission after the T1 time on the second BWP is T2, and the switching module 802 is configured to: switching from the first BWP to the second BWP at time (T2-X), or at time T1, where X is a length of time required for BWP switching, if a time interval between time T1 and time T2 is less than X.

Alternatively, the processor may, as an embodiment,

the switching module 802 switches from the first BWP to the second BWP at time (T2-X), where the terminal does not expect to receive the downlink transmission between time (T2-X) on the first BWP to time T1; or

The switching module 802 switches from the first BWP to the second BWP at the time T1, wherein the terminal does not expect to receive the downlink transmission between the time T2 to the time (T1+ X) on the second BWP.

Optionally, as an embodiment, the switching module 802 is further configured to: determining to switch from the first BWP to the second BWP at the time (T2-X) or at the time T1, based on at least one of:

BWP identification;

configuring high-level signaling;

receiving the priority of the corresponding service in a downlink manner;

a downlink reception type;

controlling the type and/or priority of the resource set;

type and/or priority of the search space.

Optionally, as an embodiment, the switching module 802 is configured to: switching from the first BWP to the second BWP when there is a downlink transmission on the second BWP between the two target downlink transmissions.

Alternatively, the processor may, as an embodiment,

the first BWP is the MBS BWP, and the second BWP is a unicast BWP for unicast downlink transmission;

the first BWP is a unicast BWP used for unicast downlink transmission, and the second BWP is the MBS BWP; or

The terminal is configured with a plurality of MBS BWPs, the first BWP is one MBS BWP, and the second BWP is another MBS BWP.

Optionally, as an embodiment, the target downlink transmission includes at least one of:

configured PDCCH monitoring opportunities, configured PDSCH transmission, scheduled PDSCH transmission, CSI-RS transmission, and SSB transmission of synchronization and broadcast blocks.

Optionally, as an embodiment, the terminal 800 further includes a determining module, configured to:

determining the second BWP from a unicast BWP for unicast downlink transmission and N of the MBS BWPs, or from M of the MBS BWPs, according to at least one of:

BWP identification;

configuring high-level signaling;

receiving the priority of the corresponding service in a downlink manner;

a downlink reception type;

controlling the type and/or priority of the resource set;

type and/or priority of the search space;

in the case of simultaneous downlink transmissions on the first BWP and the second BWP, determining whether to switch from the first BWP to the second BWP based on at least one of:

BWP identification;

configuring high-level signaling;

receiving the priority of the corresponding service in a downlink manner;

a downlink reception type;

controlling the type and/or priority of the resource set;

type and/or priority of the search space.

Optionally, as an embodiment, the switching module 802 is configured to: switching from the first BWP to the second BWP if a target timer times out.

Optionally, as an embodiment, the switching module 802 is configured to:

under the condition that a first timer is overtime, switching from the MBS BWP to a unicast BWP for unicast downlink transmission;

under the condition that a second timer is overtime, switching from unicast BWP for unicast downlink transmission to MBS BWP;

under the condition that a third timer is overtime, switching from the MBS BWP to a default BWP or an initial BWP;

and under the condition that the fourth timer is overtime, switching from one MBS BWP to another MBS BWP.

Optionally, as an embodiment, the terminal 800 is configured with a plurality of MBS BWPs, and a BWP switching sequence for switching from the first BWP to the second BWP is predefined or configured by higher layer signaling.

Optionally, as an embodiment, the switching module 802 is configured to: and switching from the first BWP to the second BWP when downlink control information DCI is received, wherein the DCI is used for indicating the terminal to switch from the first BWP to the second BWP.

Optionally, as an embodiment, the DCI is further configured to indicate at least one of the following for the second BWP: BWP index, BWP type; wherein the BWP type includes an MBS type or a unicast type.

The terminal 800 according to the embodiment of the present application may refer to the flow corresponding to the method 200 of the embodiment of the present application, and each unit/module and the other operations and/or functions in the terminal 800 are respectively for implementing the corresponding flow in the method 200 and achieving the same or equivalent technical effects, and for brevity, no further description is provided herein.

The terminal in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in the terminal. The terminal may be a mobile terminal or a non-mobile terminal. By way of example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.

The terminal in the embodiment of the present application may be a device having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.

The terminal provided in the embodiment of the present application can implement each process implemented by the method embodiments of fig. 2 to fig. 7, and achieve the same technical effect, and is not described here again to avoid repetition.

Optionally, as shown in fig. 9, an embodiment of the present application further provides a communication device 900, which includes a processor 901, a memory 902, and a program or an instruction stored in the memory 902 and executable on the processor 901, for example, when the communication device 900 is a terminal, the program or the instruction is executed by the processor 901 to implement the processes of the foregoing BWP switching method embodiment, and the same technical effect can be achieved, and is not described herein again to avoid repetition.

Fig. 10 is a schematic hardware structure diagram of a terminal implementing the embodiment of the present application.

The terminal 1000 includes, but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, and a processor 1010.

Those skilled in the art will appreciate that terminal 1000 can also include a power supply (e.g., a battery) for powering the various components, which can be logically coupled to processor 1010 via a power management system to provide management of charging, discharging, and power consumption via the power management system. The terminal structure shown in fig. 10 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or combine some components, or have a different arrangement of components, and thus will not be described again.

It should be understood that in the embodiment of the present application, the input Unit 1004 may include a Graphics Processing Unit (GPU) 10041 and a microphone 10042, and the Graphics Processing Unit 10041 processes image data of still pictures or videos obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071 is also referred to as a touch screen. The touch panel 10071 may include two parts, a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In this embodiment of the application, the radio frequency unit 1001 receives downlink data from a network side device and then processes the downlink data to the processor 1010; in addition, the uplink data is sent to the network side equipment. In general, radio frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 1009 may be used to store software programs or instructions and various data. The memory 1009 may mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, and the like) required for at least one function, and the like. Further, the Memory 1009 may include a high-speed random access Memory and may also include a nonvolatile Memory, where the nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable PROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

Processor 1010 may include one or more processing units; alternatively, processor 1010 may integrate an application processor that handles primarily the operating system, user interface, and application programs or instructions, and a modem processor that handles primarily wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into processor 1010.

Wherein, the processor 1010 is configured to switch from the first BWP to the second BWP if the switching condition is satisfied; wherein at least one of the first BWP and the second BWP is an MBS BWP for MBS downlink transmission of broadcast multicast service.

In the embodiment of the present application, the terminal 1000 performs a handover from the first BWP to the second BWP when the handover condition is satisfied, for example, performs a handover from the MBS BWP to the unicast BWP, performs a handover from the unicast BWP to the MBS BWP, and performs a handover from one MBS BWP to another MBS BWP, so that the terminal can flexibly perform BWP handover, and further flexibly receive MBS services, thereby improving communication efficiency.

The terminal 1000 according to the embodiment of the present application may further implement each process of the BWP switching method embodiment, and achieve the same technical effect, and for avoiding repetition, details are not described here.

An embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the BWP switching method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The processor may be the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

An embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement each process of the BWP switching method embodiment, and the same technical effect can be achieved, and is not described herein again to avoid repetition.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for bandwidth part BWP handover, the method comprising:

the terminal switches from the first BWP to the second BWP under the condition that the switching condition is met; wherein at least one of the first BWP and the second BWP is an MBS BWP for MBS downlink transmission of broadcast multicast service.

2. The method of claim 1, wherein the terminal switching from the first BWP to the second BWP if the handover condition is satisfied comprises:

and the terminal switches from the first BWP to the second BWP after the target downlink transmission on the first BWP is finished or is about to be finished.

3. The method according to claim 2, wherein the ending time of the target downlink transmission is T1, the starting time of the most recent downlink transmission after the T1 time on the second BWP is T2, and the terminal switching from the first BWP to the second BWP when the target downlink transmission on the first BWP ends or is about to end comprises:

in the case that the time interval between the time T1 and the time T2 is greater than or equal to X, the terminal switches from the first BWP to the second BWP at the time T1, or at the time (T2-X), or at any time between the time T1 and the time (T2-X), wherein X is the time length required for BWP switching.

4. The method according to claim 2, wherein the ending time of the target downlink transmission is T1, the starting time of the most recent downlink transmission after the T1 time on the second BWP is T2, and the terminal switching from the first BWP to the second BWP when the target downlink transmission on the first BWP ends or is about to end comprises:

in case that the time interval between the time T1 and the time T2 is less than X, the terminal switches from the first BWP to the second BWP at the time (T2-X), or at the time T1, wherein X is the duration of BWP switching.

5. The method of claim 4,

the terminal switching from the first BWP to the second BWP at time (T2-X), wherein the terminal does not expect to receive the downlink transmission between time (T2-X) and time T1 on the first BWP; or

The terminal switches from the first BWP to the second BWP at the time T1, wherein the terminal does not expect to receive the downlink transmission between the time T2 to the time (T1+ X) on the second BWP.

6. The method of claim 4, further comprising: the terminal determines to switch from the first BWP to the second BWP at the time (T2-X) or at the time T1 according to at least one of:

BWP identification;

configuring high-level signaling;

receiving the priority of the corresponding service in a downlink manner;

a downlink reception type;

controlling the type and/or priority of the resource set;

type and/or priority of the search space.

7. The method of claim 2, wherein the terminal switching from the first BWP to the second BWP if the handover condition is satisfied comprises:

and in the case that downlink transmission exists on the second BWP between the two target downlink transmissions, the terminal switches from the first BWP to the second BWP.

8. The method according to any one of claims 2 to 7,

9. The method according to any of claims 2 to 7, wherein the targeted downlink transmission comprises at least one of:

10. The method of claim 1, further comprising:

the terminal determines the second BWP from unicast BWPs used for unicast downlink transmission and N MBS BWPs or determines the second BWP from M MBS BWPs according to at least one of the following conditions:

BWP identification;

configuring high-level signaling;

receiving the priority of the corresponding service in a downlink manner;

a downlink reception type;

controlling the type and/or priority of the resource set;

type and/or priority of the search space;

11. The method of claim 1, further comprising: the terminal determines whether to switch from the first BWP to the second BWP according to at least one of the following conditions when downlink transmission exists on the first BWP and the second BWP simultaneously:

BWP identification;

configuring high-level signaling;

receiving the priority of the corresponding service in a downlink manner;

a downlink reception type;

controlling the type and/or priority of the resource set;

type and/or priority of the search space.

12. The method of claim 1, wherein the terminal switching from the first BWP to the second BWP if the handover condition is satisfied comprises:

and the terminal switches from the first BWP to the second BWP under the condition that the target timer is overtime.

13. The method of claim 12, wherein the terminal switching from the first BWP to the second BWP with a target timer comprises at least one of:

the terminal switches from the MBS BWP to a unicast BWP for unicast downlink transmission under the condition that a first timer is overtime;

the terminal switches from unicast BWP for unicast downlink transmission to the MBS BWP under the condition that the second timer is overtime;

the terminal switches from the MBS BWP to a default BWP or an initial BWP under the condition that a third timer is overtime;

and the terminal switches from one MBS BWP to another MBS BWP under the condition that the fourth timer is overtime.

14. The method of claim 12, wherein the terminal is configured with a plurality of MBS BWPs, and wherein the BWP handover sequence for handover from a first BWP to a second BWP is predefined or configured with higher layer signaling.

15. The method of claim 1, wherein the terminal switching from the first BWP to the second BWP if the handover condition is satisfied comprises:

the terminal switches from the first BWP to the second BWP when receiving downlink control information DCI, wherein the DCI is used for indicating the terminal to switch from the first BWP to the second BWP.

16. The method of claim 15, wherein the DCI is further configured to indicate at least one of the following for the second BWP: BWP index, BWP type; wherein the BWP type includes an MBS type or a unicast type.

17. A terminal, comprising:

a switching module, configured to switch from a first BWP to a second BWP if a switching condition is satisfied; wherein at least one of the first BWP and the second BWP is an MBS BWP for MBS downlink transmission of broadcast multicast service.

18. The terminal of claim 17, wherein the switching module is configured to:

and switching from the first BWP to the second BWP when the target downlink transmission on the first BWP is finished or is about to be finished.

19. The terminal of claim 18, wherein the end time of the target downlink transmission is T1, and the start time of the latest downlink transmission after the T1 time on the second BWP is T2, and wherein the switching module is configured to:

switching from the first BWP to the second BWP at the time T1, or at a time (T2-X), or at any time between the time T1 and the time (T2-X), in a case where a time interval between the time T1 and the time T2 is greater than or equal to X, where X is a length of time required for BWP switching.

20. The terminal of claim 18, wherein the end time of the target downlink transmission is T1, and the start time of the latest downlink transmission after the T1 time on the second BWP is T2, and wherein the switching module is configured to:

switching from the first BWP to the second BWP at time (T2-X), or at time T1, where X is a length of time required for BWP switching, if a time interval between time T1 and time T2 is less than X.

21. The terminal of claim 20,

the switching module switches from the first BWP to the second BWP at time (T2-X), wherein the terminal does not expect to receive the downlink transmission between time (T2-X) on the first BWP to time T1; or

The switching module switches from the first BWP to the second BWP at time T1, wherein the terminal does not expect to receive the downlink transmission between time T2 to time (T1+ X) on the second BWP.

22. The terminal of claim 20, wherein the switching module is further configured to:

determining to switch from the first BWP to the second BWP at the time (T2-X) or at the time T1, based on at least one of:

BWP identification;

configuring high-level signaling;

receiving the priority of the corresponding service in a downlink manner;

a downlink reception type;

controlling the type and/or priority of the resource set;

type and/or priority of the search space.

23. The terminal of claim 18, wherein the switching module is configured to:

switching from the first BWP to the second BWP when there is a downlink transmission on the second BWP between the two target downlink transmissions.

24. The terminal according to any of the claims 18 to 23,

25. The terminal according to any of claims 18 to 23, wherein the targeted downlink transmission comprises at least one of:

26. The terminal of claim 17, further comprising a determining module configured to:

BWP identification;

configuring high-level signaling;

receiving the priority of the corresponding service in a downlink manner;

a downlink reception type;

controlling the type and/or priority of the resource set;

type and/or priority of the search space;

27. The terminal of claim 17, further comprising a determining module configured to:

BWP identification;

configuring high-level signaling;

receiving the priority of the corresponding service in a downlink manner;

a downlink reception type;

controlling the type and/or priority of the resource set;

type and/or priority of the search space.

28. The terminal of claim 17, wherein the switching module is configured to:

switching from the first BWP to the second BWP if a target timer times out.

29. The terminal of claim 28, wherein the switching module is configured to at least one of:

30. The terminal of claim 28, wherein the terminal is configured with a plurality of MBS BWPs, and wherein a BWP handover sequence for handover from a first BWP to a second BWP is predefined or configured with higher layer signaling.

31. The terminal of claim 17, wherein the switching module is configured to:

and switching from the first BWP to the second BWP when downlink control information DCI is received, wherein the DCI is used for indicating the terminal to switch from the first BWP to the second BWP.

32. The terminal of claim 31, wherein the DCI is further configured to indicate at least one of the following for the second BWP: BWP index, BWP type; wherein the BWP type includes an MBS type or a unicast type.

33. A terminal comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the BWP switching method according to any one of claims 1 to 16.

34. A readable storage medium on which a program or instructions are stored, which when executed by the processor, implements the BWP switching method according to any one of claims 1 to 16.