WO2020181475A1

WO2020181475A1 - Method and device for bwp switching

Info

Publication number: WO2020181475A1
Application number: PCT/CN2019/077724
Authority: WO
Inventors: 石聪
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-03-11
Filing date: 2019-03-11
Publication date: 2020-09-17
Also published as: CN112005593A; CN112005593B

Abstract

Disclosed is a method for BWP switching, capable of increasing the performance of data transmission on an unlicensed band. The method comprises: a terminal device controls a BWP switching timer to keep time outside of a specified period, the specified period being a period in which a network device may transmit data to the terminal device; and when the BWP switching timer expires, the terminal device switches from a currently used first BWP to a second BWP.

Description

Method and equipment for BWP switching

Technical field

The embodiments of the present application relate to the communication field, and more specifically, to a method and device for switching a bandwidth part (Bandwidth Part, BWP).

Background technique

In the 5G system, or New Radio (NR) system, data transmission on unlicensed spectrum (unlicensed spectrum) is supported. When a communication device performs NR-based access to unlicensed spectrum (NR-U) communication on an unlicensed frequency band, it needs to be based on the principle of Listen Before Talk (LBT). Before the base station sends a signal on the unlicensed frequency band, it needs to perform channel detection. If the channel is detected, it cannot transmit data. If it is detected that the channel is not occupied, data can be transmitted, and the maximum time that the base station can use to transmit data is the maximum channel occupation time (Max Channel Occupy Time, MCOT).

In addition, the concept of BWP is introduced in the 5G system. The network device may configure multiple BWPs to the terminal device, and different BWPs may have different bandwidth sizes, different frequency positions, and different subcarrier intervals. The terminal device can switch between different BWPs. The terminal device can support multiple BWP switching methods, such as BWP switching based on a timer. If there is no data transmission within the duration of the timer, the terminal device can switch to a BWP with a smaller bandwidth, thereby reducing power consumption and saving signaling.

However, in the NR-U scenario, when switching BWP based on a timer, there may be the following problems: First, if the timer expires within a non-MCOT time and the terminal device performs BWP switching, it may be because the base station has not preempted Channel does not mean that the base station has no data transmission on the currently activated BWP; secondly, if the timer expires within the MCOT time and causes the terminal device to perform BWP handover, it may cause the base station to re-execute LBT on the new BWP to transmit data to the terminal device . These problems seriously affect the performance of data transmission in the NR-U scenario.

Summary of the invention

The embodiments of the present application provide a method and device for BWP handover, which can improve the performance of data transmission on an unlicensed frequency band.

In the first aspect, a method for BWP switching is provided, including: a terminal device controls a BWP switching timer to count outside a specific time period, the specific time period being a time period during which the network device may transmit data to the terminal device; When the BWP switching timer expires, switching from the currently used first BWP to the second BWP.

Based on this technical solution, the terminal device controls the BWP switching timer to time in a non-specific period, and performs BWP switching when the BWP switching timer expires. In the specific time period, the network device can schedule data to the terminal device, but in the non-specific time period, the network device cannot schedule data to the terminal device. Since the BWP switching timer counts in the non-specific time period, the BWP switching timer will time out in the non-specific time period, so the BWP switching also occurs in the non-specific time period, so that it will not be caused by data transmission that may occur during the specific time period Impact, improve the performance of data transmission.

In a second aspect, a method for BWP switching is provided, which includes: a terminal device controls a BWP switching timer to count within a specific time period, the specific time period being a time period during which the network device may transmit data to the terminal device; When the BWP switching timer expires, switching from the currently used first BWP to the second BWP.

Based on this technical solution, the terminal device controls the BWP switching timer to time within a specific time period, and performs BWP switching when the BWP switching timer expires. In the specific time period, the network device can be used to schedule data to the terminal device, but in the non-specific time period, the network device cannot schedule data to the terminal device. Therefore, the timing of the BWP handover timer reflects the length of time that the network device can schedule data for the terminal device. The timeout of the BWP switching timer means that although the network device has obtained the channel use right, it has not scheduled data for the terminal device within a certain period of time. At this time, switching from the first BWP to the second BWP reduces the data for the terminal device. Transmission affects.

In a third aspect, a method for BWP switching is provided, including: if a terminal device does not detect data transmission within M specific time periods, switching from the currently used first BWP to the second BWP, the specific time period being the network The period during which the device may transmit data to the terminal device.

Based on this technical solution, the terminal device determines whether to perform BWP switching by recording the number of specific time periods in which data transmission is not detected. In the specific time period, the network device can schedule data to the terminal device, but in the non-specific time period, the network device cannot schedule data to the terminal device. Therefore, when the terminal device does not detect data transmission in M specific time periods, it means that the currently activated first BWP is not an "active BWP". At this time, switching from the first BWP to the second BWP reduces the value of the terminal device. The data transmission affects.

In a fourth aspect, a terminal device is provided, which can execute the foregoing first aspect or any optional implementation method of the first aspect. Specifically, the terminal device may include a functional module for executing the foregoing first aspect or any possible implementation of the first aspect.

In a fifth aspect, a terminal device is provided, and the terminal device can execute the foregoing second aspect or any optional implementation method of the second aspect. Specifically, the terminal device may include a functional module for executing the foregoing second aspect or any possible implementation of the second aspect.

In a sixth aspect, a terminal device is provided, and the terminal device can execute the foregoing third aspect or any optional implementation method of the third aspect. Specifically, the terminal device may include a functional module for executing the foregoing third aspect or any possible implementation manner of the third aspect.

In a seventh aspect, a terminal device is provided, including 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 execute the above-mentioned first aspect or the method in any possible implementation of the first aspect.

In an eighth aspect, a terminal device is provided, including 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 execute the above-mentioned second aspect or the method in any possible implementation of the second aspect.

In a ninth aspect, a terminal device is provided, including 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 execute the third aspect or the method in any possible implementation manner of the third aspect.

In a tenth aspect, a chip is provided for implementing the foregoing first aspect or any possible implementation of the first aspect. Specifically, the chip includes a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the method in the first aspect or any possible implementation of the first aspect.

In an eleventh aspect, a chip is provided for implementing the foregoing second aspect or any possible implementation method of the second aspect. Specifically, the chip includes a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the method in the second aspect or any possible implementation manner of the second aspect.

In a twelfth aspect, a chip is provided for implementing the foregoing third aspect or any possible implementation method of the third aspect. Specifically, the chip includes a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the method in the third aspect or any possible implementation of the third aspect.

In a thirteenth aspect, a computer-readable storage medium is provided for storing a computer program that enables a computer to execute the above-mentioned first aspect or the method in any possible implementation of the first aspect.

In a fourteenth aspect, a computer-readable storage medium is provided for storing a computer program that enables a computer to execute the method in the second aspect or any possible implementation of the second aspect.

In a fifteenth aspect, a computer-readable storage medium is provided for storing a computer program that enables a computer to execute the method in the third aspect or any possible implementation manner of the third aspect.

In a sixteenth aspect, a computer program product is provided, including computer program instructions that cause a computer to execute the above-mentioned first aspect or the method in any possible implementation of the first aspect.

In a seventeenth aspect, a computer program product is provided, including computer program instructions, which cause a computer to execute the foregoing second aspect or any possible implementation of the second aspect.

In an eighteenth aspect, a computer program product is provided, including computer program instructions that cause a computer to execute the foregoing third aspect or any possible implementation of the third aspect.

In a nineteenth aspect, a computer program is provided, which when running on a computer, causes the computer to execute the method in the first aspect or any possible implementation of the first aspect.

In a twentieth aspect, a computer program is provided, which when running on a computer, causes the computer to execute the above-mentioned second aspect or the method in any possible implementation of the second aspect.

In a twenty-first aspect, a computer program is provided, which when running on a computer, causes the computer to execute the foregoing third aspect or any possible implementation of the third aspect.

In a twenty-second aspect, a communication system is provided, including terminal equipment and network equipment.

The network device is used to configure a BWP switching timer for the terminal device;

The terminal device is used to: control the BWP switching timer to time outside a specific time period, the specific time period being within the MCOT of the network device; when the BWP switching timer expires, the terminal device starts from the currently used first One BWP switches to the second BWP.

In a twenty-third aspect, a communication system is provided, including terminal equipment and network equipment.

The terminal device is used for: the terminal device controls the BWP switching timer to count within a specific period of time, and the specific period is within the MCOT of the network device; when the BWP switching timer expires, the terminal device starts from the current The first BWP is switched to the second BWP.

Description of the drawings

Fig. 1 is a schematic diagram of a possible wireless communication system applied by an embodiment of the present application.

Figure 2 is a schematic diagram of BWP switching.

Fig. 3 is a schematic flowchart of a BWP handover method according to an embodiment of the present application.

FIG. 4 is a schematic flowchart of a method for BWP handover according to an embodiment of the present application.

FIG. 5 is a schematic flowchart of a method for BWP handover according to an embodiment of the present application.

Fig. 6 is a schematic diagram of timer-based BWP handover according to an embodiment of the present application.

Fig. 7 is a schematic diagram of a timer-based BWP handover according to an embodiment of the present application.

Fig. 8 is a schematic diagram of timer-based BWP handover according to an embodiment of the present application.

Fig. 9 is a schematic diagram of a timer-based BWP handover according to an embodiment of the present application.

FIG. 10 is a schematic block diagram of a terminal device according to an embodiment of the present application.

FIG. 11 is a schematic block diagram of a terminal device according to an embodiment of the present application.

FIG. 12 is a schematic block diagram of a terminal device according to an embodiment of the present application.

FIG. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application.

FIG. 14 is a schematic structural diagram of a chip of an embodiment of the present application.

FIG. 15 is a schematic block diagram of a communication system according to an embodiment of the present application.

FIG. 16 is a schematic block diagram of a communication system according to another embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced long term evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed frequency bands (LTE-based access to unlicensed spectrum, LTE-U) system, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed frequency bands, Universal Mobile Telecommunication System (UMTS), global Worldwide Interoperability for Microwave Access (WiMAX) communication systems, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but will also support, for example, device to device (D2D) communication, machine to machine (Machine to Machine, M2M) communication, and machine type Communication (Machine Type Communication, MTC) and inter-vehicle (Vehicle to Vehicle, V2V) communication, etc., embodiments of the present application can also be applied to these communication systems.

In addition, the communication system in the embodiments of the present application can also be applied to scenarios such as carrier aggregation (CA), dual connectivity (DC), and standalone (SA) networking.

Exemplarily, the communication system 100 applied in the embodiment of the present application is shown in FIG. 1. The wireless communication system 100 may include a network device 110. The network device 110 may be a device that communicates with terminal devices. The network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area. Optionally, the network device 100 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the network side device in the NR system, or the wireless controller in the Cloud Radio Access Network (CRAN), or the network device can be a relay station or Entry points, in-vehicle devices, wearable devices, network-side devices in next-generation networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.

The wireless communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110. The terminal device 120 may be mobile or fixed. Optionally, the terminal device 120 may refer to an access terminal, user equipment (UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication Equipment, user agent or user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or terminal devices in the future evolved PLMN, etc. Wherein, optionally, direct terminal (D2D) communication may also be performed between the terminal devices 120.

The network device 110 may provide services for a cell, and the terminal device 120 communicates with the network device 110 through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell. The cell may be a cell corresponding to the network device 110 (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell (Small cell). The small cells here may include, for example, metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmit power. , Suitable for providing high-speed data transmission services.

Fig. 1 exemplarily shows one network device and two terminal devices. The wireless communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices, which is not limited in this application. In addition, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity.

In the NR system, data transmission on unlicensed frequency bands (or called unlicensed spectrum) is supported. These include the following working scenarios: (1) Carrier aggregation scenario: the primary cell (Primary Cell, PCell) uses licensed spectrum, and the secondary cell (Secondary Cell, SCell) works in unlicensed spectrum through carrier aggregation; (2) Dual connectivity scenario: PCell uses LTE licensed spectrum, primary and secondary cell (Primary Secondary Cell, PScell) uses NR unlicensed spectrum; (3) Standalone (SA) working scenario: NR works as an independent cell in unlicensed spectrum.

Generally speaking, the working frequency band (Band) of NR-U is 5GHz unlicensed spectrum and 6GHz unlicensed spectrum. On the unlicensed spectrum, the design of NR-U should ensure fairness with other systems that are already working on these unlicensed spectrums, such as WiFi. The principle of fairness is that the impact of NR-U on systems that have been deployed on unlicensed spectrum (such as WiFi) cannot exceed the impact between these systems.

In order to ensure fair coexistence between systems on unlicensed spectrum, energy detection has been agreed as a basic coexistence mechanism. The commonly used energy detection mechanism is the LBT mechanism. The basic principle of the mechanism is that the base station or terminal device (transmitting end) needs to perform channel listening for a period of time as required before transmitting data on the unlicensed spectrum. If the result of the listening indicates that the channel is idle, the transmitting end can transmit data to the receiving end. If the listening result indicates that the channel is in an occupied state, the transmitting end needs to back off for a period of time according to regulations and then continue channel listening. Data can be transmitted to the receiving end only when the channel listening result is ensured that the channel is idle.

For the channel access procedure of the LTE Licensed Assisted Access (LTE Licensed Assisted Access, LTE LAA) unlicensed spectrum, for example, refer to Table 1. For downlink data transmission, the base station needs to perform LBT on the unlicensed frequency band. In LAA, the access priority level of the channel is determined by Table 1.

Among them, M _{p is} related to the channel listening time for channel access. For example, the base station needs to perform channel sensing time Td, where _{_{T d = 16us + M p ×}} 9us.

CW _min,p and CW _{max,p are} related to the random channel listening time during channel access. For example, when the base station finds that the channel is idle during the listening time T _d , it needs to perform N channel listening again, and the duration of each channel listening is 9 us. Among them, N is a random number from 0 to CWp, and CW _min,p ≤CW _p ≤CW _max,p .

T _mcot,p is the longest time that the base station can occupy the channel after preempting the channel, and it is related to the channel priority adopted by the base station. For example, if the priority is 1, the channel can be occupied for a maximum of 2ms after successful channel sensing.

Therefore, for terminal equipment, the base station must transmit data to the terminal equipment within MCOT time. If the base station does not preempt the channel, that is, outside the MCOT time, the terminal device will not receive the data scheduled by the base station to the terminal device.

Table I

The concept of BWP is introduced in the 5G system. The network device can configure multiple BWPs for the terminal device. For example, the network device can configure a maximum of 4 uplink BWP (UL BWP) and 4 downlink BWP (DL BWP) for the terminal device in the connected state. There can only be one activated UL BWP and one activated DL BWP at a time.

For frequency division duplex (Frequency Division Duplex, FDD) systems, there is no shown association relationship between UL BWP and DL BWP. For example, a network device can configure 4 uplink BWPs (for example, the BWP index (index) is 0,1,2,3) and 4 downlink BWPs (for example, the BWP index is 0,1) for a connected terminal device. ,2,3). The currently activated UL BWP may be UL BWP 0, and the currently activated DL BWP may be DL BWP 1. If the network device instructs the terminal device to switch DL BWP through downlink control information (Download Control Information, DCI), for example, switch from the currently activated DL BWP 1 to DL BWP 2. Then the terminal device switches from DL BWP 1 to DL BWP 2, and the UL BWP can remain unchanged.

The terminal device can support multiple BWP switching methods. For example, BWP handover based on DCI control, BWP handover based on radio resource control (Radio Resource Control, RRC) signaling, timer-based BWP handover, and BWP handover based on Random Access Channel (RACH) trigger .

For timer-based handover, the network device may configure a timer for the terminal device, that is, a BWP-Inactivity Timer (bwp-InactivityTimer). When the timer expires, the terminal device switches from the currently activated BWP to the default or initial BWP.

The start or restart of the timer may be based on a physical downlink control channel (Downlink Physical Control Channel, PDCCH) scheduling instruction received by the terminal device. That is, the terminal device starts or restarts the timer when it detects data transmission. The start or restart of the timer may also be based on the instruction of activating the PDCCH to instruct the BWP switch, that is, the terminal device starts or restarts the timer when the BWP switch is performed.

The reason for introducing this timer is to save signaling overhead on the one hand, and to reduce the power consumption of terminal equipment on the other hand. This timer is for the currently activated DL BWP. If the timer expires, the terminal device automatically switches from the currently activated DL BWP to the default or initial DL BWP. Because the bandwidth of the default or initial DL BWP is usually small. In this way, the terminal device in the currently activated DL BWP, if there is no data transmission within the timer duration T (timeout after the timer starts or restarts the duration T), it can automatically switch to a BWP with a smaller bandwidth. It saves both power and signaling.

However, in the NR-U scenario, since the base station can only occupy the channel for a certain period of time after preempting the channel, the protocol has a limitation on the occupation period, and the maximum period is MCOT. For the terminal equipment, it is possible to be scheduled by the base station only in the MCOT. In other times, because the base station does not preempt the channel, it cannot send downlink data to the terminal equipment. At this time, when the terminal device switches the BWP based on the timer, at least the following problems exist:

First, if the timer expires within the non-MCOT time and causes the terminal device to perform DL BWP handover, it may be because the base station has not preempted the channel, which does not mean that there is no terminal device data on the currently activated DL BWP;

Secondly, if the timer expires within the MCOT time and causes the terminal device to perform DL BWP handover, the base station seizes the channel on the activated BWP at this time, and the default DL BWP and the current DL BWP do not overlap in the frequency band, which may cause the base station Re-execute LBT on the default DL BWP to transmit data to the terminal device.

These problems all affect the performance of data transmission in the NR-U scenario.

Taking Fig. 2 as an example, Fig. 2 shows the process of BWP switching based on the timer. The first BWP is the currently activated DL BWP, the second BWP is the default or initial DL BWP, and the bandwidth of the second BWP is smaller than the bandwidth of the first BWP.

If the timer expires at time T1 and time T1 is outside the MCOT, the terminal device switches from the first BWP to the second BWP at time T1. However, this does not mean that there is no data of the terminal device in the MCOT, and it may be that the base station has not preempted the channel, so it is unreasonable to switch to the second BWP, which will affect the data receiving performance of the terminal device.

If the timer expires at T2, the T2 is within the MCOT, and the terminal device switches from the first BWP to the second BWP at T2. However, if the base station in the MCOT is sending data to the terminal device, after switching to the second BWP, the base station needs to re-execute LBT on the second BWP, and can only send data to the terminal device on the second BWP after obtaining the channel usage rights .

For this reason, an embodiment of the present application proposes a method for BWP handover, which can solve the above-mentioned problems, thereby improving data transmission performance.

FIG. 3 is a schematic flowchart of a method 300 for BWP handover according to an embodiment of the present application. The method 300 may be executed by a terminal device, and the terminal device may be, for example, the terminal device 120 in FIG. 1 or the like. As shown in FIG. 3, the method 300 includes some or all of the following steps.

In 310, the terminal device controls the BWP switching timer to count outside a certain period of time.

In other words, the terminal device controls the BWP handover timer to time in an unspecified time period.

Optionally, the specific period is a period during which the network device may transmit data to the terminal device.

For example, the specific time period is the MCOT of the network device; or, the specific time period is a certain period of time within the MCOT.

In 320, when the BWP switching timer expires, the terminal device switches from the currently used first BWP to the second BWP.

The terminal device controls the BWP switching timer to time in a non-specific period, and performs BWP switching when the BWP switching timer expires. In the specific time period, the network device can schedule data to the terminal device, but in the non-specific time period, the network device cannot schedule data to the terminal device. Since the BWP switching timer counts in the non-specific time period, the BWP switching timer will time out in the non-specific time period, so the BWP switching also occurs in the non-specific time period, so that it will not cause data transmission that may occur in the specific time period. Impact, improve the performance of data transmission.

Optionally, the method further includes: if the terminal device detects data transmission within the specific time period, restarting the BWP switching timer at the end of the specific time period in which the data transmission is detected.

For example, taking the specific time period as MCOT, the terminal device controls the BWP switching timer to time outside the MCOT. If the terminal device detects data transmission in the MCOT, it restarts the BWP at the end of the MCOT where the data transmission is detected. Switch the timer.

The BWP switching timer is used for timing outside a specific time period. However, when the terminal device detects data transmission within a certain period of time, indicating that the first BWP is currently an "active BWP", the terminal device needs to restart the BWP switching timer at the end of the specific period of data detection, to Extend the timeout time of the BWP switching timer, that is, extend the time of the BWP switching, so as to ensure that the data transmission on the "active BWP" can proceed effectively.

FIG. 4 is a schematic flowchart of a method 400 for BWP handover according to an embodiment of the present application. The method 400 may be executed by a terminal device, and the terminal device may be, for example, the terminal device 120 in FIG. 1 or the like. As shown in FIG. 4, the method 400 includes some or all of the following steps.

In 410, the terminal device controls the BWP switching timer to time within a specific period of time.

In 420, when the BWP switching timer expires, the terminal device switches from the currently used first BWP to the second BWP.

The terminal device controls the BWP switching timer to time within a specific period of time, and performs BWP switching when the BWP switching timer expires. In the specific time period, the network device can schedule data to the terminal device, but in the non-specific time period, the network device cannot schedule data to the terminal device. Therefore, the timing of the BWP handover timer reflects the length of time that the network device can schedule data for the terminal device. The timeout of the BWP switching timer means that although the network device has obtained the channel usage right, it has not scheduled data for the terminal device within a certain period of time. At this time, switching from the first BWP to the second BWP will not have data for the terminal device. Transmission causes a greater impact.

Optionally, the method further includes: if the terminal device detects data transmission within the specific time period, restarting the BWP switching timer at the moment when the data transmission is detected.

For example, taking the specific time period as MCOT as an example, the terminal device controls the BWP switching timer to time in the MCOT. If the terminal device detects data transmission in the MCOT, it restarts the BWP switching timer at the moment when the data transmission is detected.

Because the BWP switching timer is used for timing in a specific time period. When the terminal device detects data transmission within a certain period of time, indicating that the first BWP is currently an "active BWP", the terminal device needs to restart the BWP switching timer to extend the timeout time of the BWP switching timer, that is, to extend The moment of BWP switching, so as to ensure that the data transmission on the "active BWP" can be carried out effectively.

FIG. 5 is a schematic flowchart of a method 500 for BWP handover according to an embodiment of the present application. The method 500 may be executed by a terminal device, and the terminal device may be, for example, the terminal device 120 in FIG. 1 or the like. As shown in FIG. 5, the method 500 includes:

In 510, if the terminal device does not detect data transmission within M specific time periods, it switches from the currently used first BWP to the second BWP.

Among them, M is a positive integer.

The terminal device determines whether to perform BWP switching by recording the number of specific periods during which no data transmission is detected, such as the number of MCOTs. In the specific time period, the network device can schedule data to the terminal device, but in the non-specific time period, the network device cannot schedule data to the terminal device. Therefore, when the terminal device does not detect data transmission in M specific time periods, it means that the currently activated first BWP is not an "active BWP". At this time, switching from the first BWP to the second BWP will not affect the terminal device. The data transmission caused a greater impact.

For example, a counter can be configured to record the number of MCOTs that have not detected data transmission. Each time the terminal device does not detect data transmission in an MCOT, the value of the counter is increased by 1. When the value recorded by the counter reaches M, the terminal device switches from the first BWP to the second BWP.

The M MCOTs may be consecutive M MCOTs.

The M MCOTs may also include non-continuous MCOTs.

Preferably, the duration between the discontinuous MCOTs is less than the preset duration.

For example, the preset duration may be the timing duration of the first timer. When the terminal device does not detect data transmission in a certain MCOT, the value of the counter is increased by 1, and the first timer is started. The duration of may be equal to MCOT, for example.

If the terminal device detects data transmission in a certain MCOT before the first timer expires, it restarts the counter at this time. If the terminal device still does not detect data transmission before the first timer expires, the value of the counter is increased by 1, and the counter continues to record the number of MCOTs that have not detected data transmission. When the value recorded by the counter reaches M, the terminal device switches from the first BWP to the second BWP.

The technical features described below are applicable to the method 300 shown in FIG. 3, the method 400 shown in FIG. 4, and the method 500 shown in FIG. 5 at the same time.

The BWP handover timer in the embodiment of the present application may be the aforementioned bwp-InactivityTimer, or may be a pre-configured or a new timer configured by the network device for the terminal device.

The network device has the right to use the channel in the MCOT, so the network device in the MCOT can send data to the terminal device, but in the non-MCOT, the network device cannot send data because it has not preempted the channel.

Optionally, the specific time period may be the MCOT of the network device.

Or, optionally, the specific time period is located within the MCOT of the network device. In other words, the specific time period is a certain period of time within the MCOT.

For example, the specific time period is the MCOT. The network device may indicate to the terminal device the location of the MCOT it obtains each time, for example, the starting location of the MCOT and the length of the MCOT. The length of the MCOT can also be pre-configured, for example, as agreed in the agreement.

For another example, the specific time period is a certain time period in the MCOT indicated by the network device to the terminal device. The network device may indicate the position of the specific time period to the terminal device, for example, indicate the start position of the specific time period and the length of the specific time period, or indicate the start position and the end position of the specific time period. Since the network device knows in which time period in the MCOT it may schedule data to the terminal device, the specific time period indicated to the terminal device is the time period during which it may send data to the terminal device. It should be understood that the network device may indicate the location of the specific time period to multiple terminal devices at the same time, but may actually only schedule data to one or a few of the terminal devices.

Or, optionally, the specific period can also cover the MCOT.

When the BWP switching timer is used for timing outside the specific time period, the specific time period may also cover the MCOT. At this time, the specific period includes MCOT and the length of the specific period is greater than the length of MCOT. The network device can only transmit data to the terminal device within the MCOT within a certain period of time, and will not transmit data to the terminal device outside the MCOT. Since the terminal device controls the BWP switching timer to time outside the specific time period, the BWP switching timer will not time out within the MCOT in the specific time period, and it will not affect possible data transmission in the MCOT.

For example, suppose that the start time and end time of the specific time period determined by the terminal device are T1 and T3, respectively, and the start time and end time of the MCOT obtained by the network device are T2 and T4, respectively. T1 to T3 can be located within T2 to T4; or, T1 and T2 overlap and T3 and T4 overlap, that is, the specific period is the MCOT; or, T1≤T2 and T3≥T4. Since the terminal device controls the BWP switching timer to time in the non-specific period, the network device will not send data to the terminal device in the non-specific period. Therefore, in these cases, the BWP switching timer will time out during the period when the network device does not schedule data to the terminal device, and the terminal device performs BWP switching without data transmission.

Optionally, the method further includes: the network device sends first indication information to the terminal device, where the first indication information is used to instruct the network device to preempt the channel on the first BWP.

Correspondingly, the method further includes: the terminal device receives the first indication information, and determines the start time of the specific time period according to the first indication information.

In other words, the time when the terminal device receives the first indication information may be used as the starting time of the specific time period. At the same time, combined with the duration or end position of the specific period, the terminal device can determine the position of the specific period in the time domain.

The first indication information may be, for example, a PDCCH or a specific sequence.

The specific sequence may be, for example, a Dedicated Reference Signal (DMRS) or the like.

For example, when the DMRS is a public DMRS, the terminal device can determine the location of the specific time period after detecting the DMRS corresponding to the PDCCH. However, at this time, the network device may send data to other terminal devices, and the terminal device may not receive the data in a certain period of time. In other words, the specific time period is a time period during which the network device may send data to the terminal device, rather than a time period during which data is always sent to the terminal device.

For another example, when the DMRS is a dedicated DMRS for the terminal device, the terminal device can determine the time domain position of the specific time period after detecting the DMRS corresponding to the PDCCH. At this time, the network device will send data to the terminal device within the specific time period.

If the BWP switching timer is used for timing outside a specific time period, then regardless of whether the first indication information is public indication information or specific indication information for the terminal device, the terminal device will pause when receiving the first indication information. The running BWP switching timer prevents the timeout of the BWP switching timer from affecting the data transmission that may occur in a specific time period.

If the BWP switching timer is used for timing within a specific time period, no matter if the first indication information is public indication information or specific indication information for the terminal device, the terminal device will resume the first indication information when it receives the first indication information. The BWP switching timer is to ensure that the BWP switching timer records the time when the network device may send data.

Optionally, the method further includes: the network device sends second indication information to the terminal device, where the second indication information is used to indicate the length of the specific time period.

Correspondingly, the method further includes: the terminal device receives the second indication information.

Alternatively, the terminal device may obtain the pre-stored length of the specific time period. For example, when the specific time period is MCOT, the length of the MCOT may be agreed upon by the protocol.

Optionally, the second indication information may also indicate the end time of the specific time period.

The terminal device can determine the location of the specific time period according to the foregoing first indication information and the second indication information.

For example, suppose that the specific time period is MCOT. When the network device preempts the channel, it sends the first indication information to the terminal device. The terminal device determines the time when the first indication information is received as the start time of the MCOT. The terminal device may obtain the duration of the MCOT from the second indication information sent by the network device, or obtain the duration of the MCOT pre-stored, so as to determine the position of the MCOT in the time domain by combining the starting time of the MCOT and the length of the MCOT.

In the embodiments of the present application, the terminal device detecting data transmission within a specific time period means that any one of the following events occurs within the specific time period:

(1) The terminal device detects the data sent by the network device;

(2) On the first BWP, the terminal device detects that a cell radio network temporary identifier (Cell-Radio Network Temporary Identifier, C-RNTI) or configuration scheduling radio indicating a downlink assignment (downlink assignment) or uplink grant (uplink grant) PDCCH scrambled by the network temporary identifier (Configuration Schedule-RNTI, CS-RNTI);

(3) The terminal device detects the PDCCH scrambled by the C-RNTI or CS-RNTI indicating the downlink allocation or uplink grant for the first BWP;

(4) The terminal device sends a Medium Access Control Protocol Data Unit (MAC PDU) in the configured uplink authorized resource, or receives a MAC PDU in the configured downlink allocated resource.

Among them, the difference between (2) and (3) is: for (2), the terminal device detects the PDCCH on the first BWP, and the C-RNTI or CS-RNTI scrambling the PDCCH is used to indicate downlink allocation or uplink grant , It can be considered that the terminal device detects data transmission. For (3), the terminal equipment detects the PDCCH on another BWP, and the C-RNTI or CS-RNTI scrambling the PDCCH is used to indicate the downlink allocation or uplink authorization for the first BWP, then the terminal equipment can be considered to have detected data transmission. For example, the terminal device detects a PDCCH for the first BWP on another carrier other than the first BWP, that is, schedules a BWP handover on another carrier on one carrier.

In other words, the detected data transmission includes not only the transmission of the data channel, but also the transmission of the control channel and other information.

When a terminal device has experienced any one of the events (1) to (4) in the specific time period, it can be considered that the terminal device has detected data transmission in the specific time period.

When the terminal device does not experience any of the above-mentioned events (1) to (4) within the specific time period, it can be considered that the terminal device does not detect data transmission within the specific time period.

In the embodiment of the present application, the “recovery” refers to continuing the time recorded last time by the timer, and “restart” refers to the timer restarting from 0 ms. For example, the timing duration of the BWP switch timer is 10ms. If the BWP switch timer is suspended (or called stopped) at 2ms, the BWP switch timer should continue to count from 2ms after it is resumed, and time out after 8ms. If the BWP switch timer is suspended (or called stopped) at 2ms, the BWP switch timer should start counting from 0ms after restarting, and time out after 10ms.

The second BWP can be the initial or default BWP. The bandwidth of the initial or default BWP may be smaller than the bandwidth of the first BWP.

In the embodiment of the present application, the first BWP may be handed over by the third BWP.

For example, before 310, 410, and 510, the network device may send third instruction information to the terminal device, where the third instruction information is used to instruct the terminal device to switch from the third BWP to the first BWP. The terminal device receives the third instruction information, and after switching to the first BWP according to the third instruction information, starts or restarts the BWP switching timer.

That is to say, after the terminal device switches to the first BWP according to the third indication information, it runs the BWP switching timer on the first BWP, for example, it can control the BWP timer to be outside the specific time period on the first BWP Time, or control the BWP switching timer to time within a specific time period on the first BWP. For how the BWP switching timer runs on the first BWP, reference may be made to the description of any one of the foregoing implementations in FIGS. 3 to 5.

The third indication information is, for example, DCI or RRC signaling. That is, the first BWP is instructed by the network device to switch through PDCCH or RRC signaling.

Wherein, the first BWP is not the default or initial BWP.

Further, optionally, the third indication information is also used to indicate whether the network device preempts the channel on the first BWP.

For example, suppose that the BWP switching timer is used for timing outside a specific time period. Then, if the third indication information indicates that the network device does not seize the channel on the first BWP, the terminal device starts or restarts the BWP switching timer at the moment of switching to the first BWP; and/or if the first BWP The third indication information indicates that the network device has seized the channel on the first BWP, and the terminal device starts and stops the BWP switching timer at the moment of switching to the first BWP.

For another example, suppose that the BWP switching timer is used for timing outside a specific time period. Then, if the third indication information indicates that the network device preempts the channel on the first BWP, the terminal device starts or restarts the BWP switching timer at the moment of switching to the first BWP; and/or, if the third indication The information indicates that the network device does not seize the channel on the first BWP, and the BWP switching timer is started and stopped at the moment when the terminal device switches to the first BWP.

Optionally, the third indication information is also used to indicate the length of a specific time period.

For example, the third indication information indicates that the network device preempts the channel on the first BWP, and at the same time indicates the length of the MCOP that preempts the channel.

It should be understood that, in the embodiment of the present application, the BWP switching timer used by the terminal device on the second BWP may be a different timer or the same timer from the BWP switching timer used on the first BWP. . Alternatively, when the second BWP is the initial or default BWP, the timer may not be configured for the second BWP. The embodiments of this application do not make any limitation on this.

The following takes FIGS. 6 to 9 as examples to describe in detail the solutions of the embodiments of the present application.

As shown in Fig. 6, assuming that the specific time period is the MCOT of the network device, the BWP switching timer is used for timing outside the MCOT, that is, timing within the non-MCOT. The first BWP is the currently activated DL BWP, and the second BWP is the DL BWP to be handed over. From left to right, it includes the first MCOT and the second MCOT. The start time of the first MCOT is T1, the end time of the first MCOT is T2, the start time of the second MCOT is T3, and the end time of the second MCOT is T4. Time T5 is the time when the BWP switching timer expires.

The terminal device suspends the running BWP switching timer at the starting time T1 of the first MCOT. If the terminal device does not detect data transmission in the first MCOT, it resumes the BWP switching timer at the ending time T2 of the first MCOT.

The BWP switching timer runs until the start time of the second MCOT is T3, and the terminal device suspends the BWP switching timer at time T3. If the terminal device does not detect data transmission in the second MCOT, it will be at the end of the second MCOT. T4 resumes the BWP switching timer.

If the BWP switching timer expires at time T5 before the arrival of the next MCOT, the terminal device switches from the first BWP to the second BWP at time T5.

As another example, as shown in FIG. 7, assuming that the specific period is the MCOT of the network device, the BWP switching timer is used to time the non-MCOT. The first BWP is the currently activated DL BWP, and the second BWP is the DL BWP to be handed over. From left to right, it includes the first MCOT and the second MCOT. The start time of the first MCOT is T1, the end time of the first MCOT is T2, the start time of the second MCOT is T3, and the end time of the second MCOT is T5. Time T4 is the time when data transmission is detected.

The BWP switching timer runs until the start time of the second MCOT is T3, and the terminal device suspends the BWP switching timer at time T3. If the terminal device detects data transmission at time T4 in the second MCOT, it will At the end time T5, the BWP switching timer is restarted.

Similarly, when the BWP switching timer expires, the terminal device switches from the first BWP to the second BWP.

Based on Figure 6 and Figure 7, it can be seen that the terminal equipment controls the BWP handover timer to time outside the MCOT, so as to ensure that the BWP handover timer will not time out in the MCOT, which prevents the base station from preempting the channel on the first BWP but the terminal equipment It has been switched to the second BWP. When the terminal device detects data transmission in a certain MCOT, it means that the current first BWP is "active BWP". The terminal device will restart the BWP switching timer at the end of the MCOT to extend the BWP switching time and ensure " The possible data transfer on the active BWP is not affected.

For another example, as shown in FIG. 8, assuming that the specific time period is MCOT, the BWP switching timer is used to time the MCOT. The first BWP is the currently activated DL BWP, and the second BWP is the DL BWP to be handed over. From left to right, it includes the first MCOT, the second MCOT, and the third MCOT. The start time of the first MCOT is T1, the end time of the first MCOT is T2, the start time of the second MCOT is T3, the end time of the second MCOT is T4, and the start time of the third MCOT is T5. Time T6 is the time when the BWP switching timer expires.

The terminal device starts or resumes the BWP switching timer at the start time T1 of the first MCOT. If the terminal device does not detect data transmission in the first MCOT, the BWP switch timer is suspended at the end time T2 of the first MCOT.

The terminal device resumes the BWP switch timer at the start time T3 of the second MCOT. If the terminal device does not detect data transmission in the second MCOT, the BWP switch timer is suspended at the end time T4 of the second MCOT.

The terminal device resumes the BWP switching timer at the start time T5 of the third MCOT, and the BWP switching timer expires at time T6 in the third MCOT, so that the terminal device switches from the first BWP to the time T6 when the BWP switching timer expires The second BWP.

For another example, as shown in FIG. 9, assuming that the specific time period is MCOT, the BWP switching timer is used to time the MCOT. The first BWP is the currently activated DL BWP, and the second BWP is the DL BWP to be handed over. From left to right, it includes the first MCOT, the second MCOT, and the third MCOT. The start time of the first MCOT is T1, the end time of the first MCOT is T2, the start time of the second MCOT is T3, the end time of the second MCOT is T4, and the start time of the third MCOT is T5. Time T6 is the time when data transmission is detected.

The terminal device restores the BWP switching timer at the start time T5 of the third MCOT. If the terminal device detects data transmission at the time T6 in the third MCOT, it restarts the BWP switching timer at time T6.

Based on Figures 8 and 9, it can be seen that the terminal device controls the BWP switching timer to time in the MCOT, and the duration recorded by the BWP switching timer truly reflects the length of time that the network device can use to schedule data for the terminal device. The timeout of the BWP switching timer means that although the network device has obtained the channel use right, it has not scheduled data for the terminal device within a certain period of time (timer duration). At this time, the terminal device switches from the first BWP to the second BWP. BWP will not have a big impact on the data transmission of the terminal equipment. If the terminal device detects data transmission in a certain MCOT, it means that the current first BWP is the "active BWP", and the terminal device will restart the BWP switching timer when the data is detected to extend the timeout of the BWP switching timer. That is to extend the BWP switching time to ensure that the data transmission on the "active BWP" is not affected.

It should be noted that, under the premise of no conflict, the various embodiments described in this application and/or the technical features in each embodiment can be combined with each other arbitrarily, and the technical solutions obtained after the combination should also fall within the protection scope of this application. .

In the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not correspond to the implementation process of the embodiments of the present application. Constitute any limitation.

The communication method according to the embodiment of the present application is described in detail above, and the device according to the embodiment of the present application will be described below with reference to FIG. 10 to FIG. 14. The technical features described in the method embodiment are applicable to the following device embodiments.

FIG. 10 is a schematic block diagram of a terminal device 1000 according to an embodiment of the present application. As shown in FIG. 10, the terminal device 1000 includes a processing unit 1010. among them:

The processing unit 1010 is configured to control the BWP switching timer to count outside a specific time period, and the specific time period is a time period during which a network device may transmit data to a terminal device;

The processing unit 1010 is further configured to switch from the currently used first BWP to the second BWP when the BWP switching timer expires.

Therefore, the terminal device controls the BWP switching timer to time within a non-specific period, and performs BWP switching when the BWP switching timer expires. In the specific time period, the network device can schedule data to the terminal device, but in the non-specific time period, the network device cannot schedule data to the terminal device. Since the BWP switching timer counts in the non-specific time period, the BWP switching timer will time out in the non-specific time period, so the BWP switch will also occur in the non-specific time period, so that data transmission that may occur during the specific time period will not be affected. Causes an impact and improves the performance of data transmission.

Optionally, the specific time period is the MCOT of the network device.

Optionally, the specific time period is located within the MCOT of the network device.

Optionally, the processing unit 1010 is further configured to: if the terminal device detects data transmission within the specific time period, restart the BWP switching timer at the end of the specific time period in which the data transmission is detected.

Optionally, the terminal device detecting data transmission within the specific time period includes: the terminal device detects data sent by the network device; and/or, the terminal device is on the first BWP , Detecting a PDCCH scrambled by a C-RNTI or CS-RNTI indicating a downlink allocation or an uplink grant; and/or, the terminal device detects a C-RNTI or a C-RNTI indicating a downlink allocation or uplink grant for the first BWP PDCCH scrambled by CS-RNTI; and/or, the terminal device sends a MAC PDU in the configured uplink authorized resource, or receives a MAC PDU in the configured downlink allocated resource.

Optionally, the terminal device further includes a transceiving unit 1020, and the transceiving unit 1020 is configured to receive first indication information, where the first indication information is used to instruct the network device to preempt the network device on the first BWP Channel; the processing unit 1010 is further configured to determine the starting time of the specific time period according to the first indication information.

Optionally, the first indication information is PDCCH.

Optionally, the first indication information is a specific sequence.

Optionally, the specific sequence is DMRS.

Optionally, the transceiving unit 1020 is further configured to: receive second indication information, where the second indication information is used to indicate the length of the specific time period; or, the processing unit 1010 is further configured to obtain all pre-stored information. Describe the length of a specific period.

Optionally, the second BWP is an initial or default BWP.

Optionally, the transceiving unit 1020 is further configured to: receive third indication information, where the third indication information is used to instruct the terminal device to switch from the third BWP to the first BWP; the processing unit 1010 also It is used to start or restart the BWP switching timer after switching to the first BWP according to the third instruction information.

Optionally, the third indication information is DCI or RRC signaling.

Optionally, the first BWP is not a default or initial BWP.

Optionally, the third indication information is also used to indicate whether the network device preempts the channel on the first BWP.

Optionally, the processing unit 1010 is specifically configured to: if the third indication information indicates that the network device has not preempted the channel on the first BWP, the terminal device is switching to the first BWP Start or restart the BWP switching timer at any time.

Optionally, the processing unit 1010 is further configured to: if the third indication information indicates that the network device preempts the channel on the first BWP, stop the BWP switch timer.

It should be understood that the terminal device 1000 can perform corresponding operations performed by the terminal device in the method 300 of the embodiment of the present application, and for the sake of brevity, details are not described herein again.

FIG. 11 is a schematic block diagram of a terminal device 1100 according to an embodiment of the present application. As shown in FIG. 11, the terminal device 1100 includes a processing unit 1110. among them:

The processing unit 1110 is configured to control the BWP switching timer to time in a specific time period, where the specific time period is a time period during which the network device may transmit data to the terminal device;

The processing unit 1110 is further configured to switch from the currently used first BWP to the second BWP when the BWP switching timer expires.

Therefore, the terminal device controls the BWP switching timer to time within a specific time period, and performs BWP switching when the BWP switching timer expires. In the specific time period, the network device can be used to schedule data to the terminal device, but in the non-specific time period, the network device cannot schedule data to the terminal device. Therefore, the timing of the BWP handover timer reflects the length of time that the network device can schedule data for the terminal device. The timeout of the BWP switching timer means that although the network device has obtained the channel usage right, it has not scheduled data for the terminal device within a certain period of time. At this time, switching from the first BWP to the second BWP will not have data for the terminal device. Transmission causes a greater impact.

Optionally, the specific time period is the MCOT of the network device.

Optionally, the processing unit 1110 is further configured to: if the terminal device detects data transmission within the specific time period, restart the BWP switching timer at the moment when the data transmission is detected.

Optionally, the terminal device further includes a transceiving unit 1120, and the transceiving unit 1120 is configured to receive first indication information, where the first indication information is used to instruct the network device to preempt the network device on the first BWP Channel; the processing unit 1110 is further configured to determine the starting time of the specific time period according to the first indication information.

Optionally, the first indication information is PDCCH.

Optionally, the first indication information is a specific sequence.

Optionally, the specific sequence is DMRS.

Optionally, the transceiving unit 1120 is further configured to: receive second indication information, where the second indication information is used to indicate the length of the specific time period; or, the processing unit 1110 is further configured to obtain all pre-stored information. Describe the length of a specific period.

Optionally, the second BWP is an initial or default BWP.

Optionally, the transceiving unit 1120 is further configured to: receive third indication information, where the third indication information is used to instruct the terminal device to switch from the third BWP to the first BWP; the processing unit 1110 is also It is used to start or restart the BWP switching timer after switching to the first BWP according to the third instruction information.

Optionally, the third indication information is DCI or RRC signaling.

Optionally, the first BWP is not a default or initial BWP.

Optionally, the processing unit is specifically configured to: if the third indication information indicates that the network device has preempted the channel on the first BWP, start or restart the station at the moment of switching to the first BWP. The BWP switching timer is described.

Optionally, the processing unit 1110 is further configured to: if the third indication information indicates that the network device has not preempted the channel on the first BWP, stop all operations at the moment of switching to the first BWP. The BWP switching timer is described.

It should be understood that the terminal device 1100 can perform corresponding operations performed by the terminal device in the method 400 of the embodiment of the present application, and for the sake of brevity, details are not described herein again.

FIG. 12 is a schematic block diagram of a terminal device 1200 according to an embodiment of the present application. As shown in FIG. 12, the terminal device 1200 includes a processing unit 1210. among them:

The processing unit 1210 is configured to switch from the first BWP currently in use to the second BWP when the terminal device does not detect data transmission in M specific time periods, where the specific time period is the time period during which the network device may transmit data to the terminal device .

Therefore, the terminal device determines whether to perform BWP switching by recording the number of specific periods in which data transmission is not detected. In the specific time period, the network device can schedule data to the terminal device, but in the non-specific time period, the network device cannot schedule data to the terminal device. Therefore, when the terminal device does not detect data transmission in M specific time periods, it means that the currently activated first BWP is not an "active BWP". At this time, switching from the first BWP to the second BWP reduces the value of the terminal device. The data transmission affects.

Optionally, the specific time period is the MCOT of the network device.

Optionally, the M MCOTs are consecutive M MCOTs.

Optionally, the M MCOTs include non-continuous MCOTs.

Optionally, the duration between the discontinuous MCOTs is less than a preset duration.

Optionally, the terminal device further includes a transceiving unit 1220, and the transceiving unit 1220 is configured to receive first indication information, where the first indication information is used to instruct the network device to preempt the network device on the first BWP Channel; the processing unit 1210 is further configured to determine the starting time of the specific time period according to the first indication information.

Optionally, the first indication information is PDCCH.

Optionally, the first indication information is a specific sequence.

Optionally, the specific sequence is DMRS.

Optionally, the transceiving unit 1220 is further configured to: receive second indication information, where the second indication information is used to indicate the length of the specific time period; or, the processing unit 1210 is further configured to obtain all pre-stored information. Describe the length of a specific period.

Optionally, the second BWP is an initial or default BWP.

Optionally, the terminal device does not detect data transmission within M specific time periods, including: the terminal device detects data sent by the network device; and/or, the terminal device is in the first BWP Above, detecting a PDCCH scrambled by a C-RNTI or CS-RNTI indicating a downlink allocation or an uplink grant; and/or, the terminal device detects a C-RNTI indicating a downlink allocation or uplink grant for the first BWP Or PDCCH scrambled by CS-RNTI; and/or, the terminal device sends MAC PDU in the configured uplink authorized resource, or receives MAC PDU in the configured downlink allocated resource.

Optionally, the transceiving unit 1220 is further configured to: receive third indication information, where the third indication information is used to instruct the terminal device to switch from the third BWP to the first BWP; the processing unit 1210 also Used to switch to the first BWP according to the third instruction information.

Optionally, the third indication information is DCI or RRC signaling.

Optionally, the first BWP is not a default or initial BWP.

It should be understood that the network device 1200 can perform the corresponding operations performed by the terminal device in the method 500 of the various embodiments of the present application. For the sake of brevity, details are not described herein again.

FIG. 13 is a schematic structural diagram of a communication device 1300 according to an embodiment of the present application. The communication device 1300 shown in FIG. 13 includes a processor 1310, and the processor 1310 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 13, the communication device 1300 may further include a memory 1320. The processor 1310 may call and run a computer program from the memory 1320 to implement the method in the embodiment of the present application.

The memory 1320 may be a separate device independent of the processor 1310, or it may be integrated in the processor 1310.

Optionally, as shown in FIG. 13, the communication device 1300 may further include a transceiver 1330, and the processor 1310 may control the transceiver 1330 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.

Among them, the transceiver 1330 may include a transmitter and a receiver. The transceiver 1330 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 1300 may specifically be a terminal device of an embodiment of the application, and the communication device 1300 may implement the corresponding process implemented by the terminal device in each method of the embodiment of the application. For brevity, details are not repeated here. .

FIG. 14 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 1400 shown in FIG. 14 includes a processor 1410, and the processor 1410 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 14, the chip 1400 may further include a memory 1420. The processor 1410 may call and run a computer program from the memory 1420 to implement the method in the embodiment of the present application.

The memory 1420 may be a separate device independent of the processor 1410, or it may be integrated in the processor 1410.

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

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

Optionally, the chip can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the terminal device in the various methods of the embodiment of the present application. For brevity, details are not repeated here.

The chip described in the embodiments of the present application may also be referred to as a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip.

The processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. 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.

The memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronous Link Dynamic Random Access Memory (Synchlink DRAM, SLDRAM) ) And Direct Rambus RAM (DR RAM).

The above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), and synchronous Dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamics Random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiment of the present application is intended to include but not limited to these and any other suitable types of memory.

FIG. 15 is a schematic block diagram of a communication system 1500 according to an embodiment of the present application. As shown in FIG. 15, the communication system 1500 includes a network device 1510 and a terminal device 1520.

Among them, the network device 1510 is used to: configure a BWP switching timer for the terminal device;

The terminal device 1520 is configured to: control the BWP switching timer to time outside a specific time period, which is the channel occupation period of the network device; when the BWP switching timer expires, switch from the first BWP currently used to the second Two BWP.

The network device 1510 may be used to implement the corresponding functions implemented by the network device in the method of the embodiment of the present application. For brevity, details are not described herein again.

The terminal device 1520 can be used to implement the corresponding functions implemented by the terminal device in the method of the embodiment of the present application, and the composition of the terminal device 1520 can be as shown in the terminal device 1000 in FIG. Repeat.

FIG. 16 is a schematic block diagram of a communication system 1600 according to an embodiment of the present application. As shown in FIG. 16, the communication system 1600 includes a network device 1610 and a terminal device 1620.

Among them, the network device 1610 is used to: configure a BWP switching timer for the terminal device;

The terminal device 1620 is configured to: control the BWP switching timer to time in a specific period, the specific period being the channel occupation period of the network device; when the BWP switching timer expires, switch from the currently used first BWP to the second BWP.

The network device 1610 may be used to implement the corresponding functions implemented by the network device in the method of the embodiment of the present application. For brevity, details are not described herein again.

The terminal device 1620 can be used to implement the corresponding functions implemented by the terminal device in the method of the embodiment of the application, and the composition of the terminal device 1620 can be as shown in the terminal device 1100 in FIG. Repeat.

The embodiment of the present application also provides a computer-readable storage medium for storing computer programs. Optionally, the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. Repeat. Optionally, the computer-readable storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. Repeat.

The embodiments of the present application also provide a computer program product, including computer program instructions. Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, it is not here. Repeat it again. Optionally, the computer program product can be applied to the terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, it is not here. Repeat it again.

The embodiment of the present application also provides a computer program. Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program runs on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it here. Optionally, the computer program can be applied to the terminal device in the embodiment of the present application. When the computer program runs on the computer, it causes the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it here.

The terms "system" and "network" in the embodiments of the present invention are often used interchangeably herein. The term "and/or" in this article is only an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

In the embodiment of the present invention, "B corresponding (corresponding) to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, and B can also be determined according to A and/or other information.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

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

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A method for bandwidth part BWP switching, characterized in that the method includes:

The terminal device controls the BWP switching timer to time outside a specific time period, and the specific time period is a time period during which the network device may transmit data to the terminal device;

When the BWP switching timer expires, the terminal device switches from the currently used first BWP to the second BWP.
The method according to claim 1, wherein the specific time period is the maximum channel occupation time MCOT of the network device.
The method according to claim 1, wherein the specific time period is within the MCOT of the network device.
The method according to any one of claims 1 to 3, wherein the method further comprises:

If the terminal device detects data transmission within the specific time period, restart the BWP switching timer at the end of the specific time period in which the data transmission is detected.
The method according to claim 4, wherein the terminal device detecting data transmission in the specific time period comprises:

The terminal device detects the data sent by the network device; and/or,

The terminal device detects, on the first BWP, a PDCCH scrambled by a cell radio network temporary identification C-RNTI or a configuration scheduling radio network temporary identification CS-RNTI that indicates downlink allocation or uplink authorization; and/or,

The terminal device detects a PDCCH scrambled by a C-RNTI or CS-RNTI indicating a downlink allocation or uplink grant for the first BWP; and/or,

The terminal device sends a MAC PDU in a configured uplink authorized resource, or receives a MAC PDU in a configured downlink allocated resource.
The method according to any one of claims 1 to 5, wherein the method further comprises:

Receiving, by the terminal device, first indication information, where the first indication information is used to instruct the network device to preempt a channel on the first BWP;

The terminal device determines the start time of the specific time period according to the first indication information.
The method according to claim 6, wherein the first indication information is a downlink control channel PDCCH.
The method according to claim 6, wherein the first indication information is a specific sequence.
The method according to claim 8, wherein the specific sequence is a demodulation reference signal DMRS.
The method according to any one of claims 1 to 9, wherein the method further comprises:

The terminal device receives second indication information, where the second indication information is used to indicate the length of the specific time period; or,

The terminal device obtains the pre-stored length of the specific time period.
The method according to any one of claims 1 to 10, wherein the second BWP is an initial or default BWP.
The method according to any one of claims 1 to 11, wherein the method further comprises:

Receiving, by the terminal device, third instruction information, where the third instruction information is used to instruct the terminal device to switch from a third BWP to the first BWP;

The terminal device starts or restarts the BWP switching timer after switching to the first BWP according to the third instruction information.
The method according to claim 12, wherein the third indication information is a downlink control signal DCI or radio resource control RRC signaling.
The method according to claim 12 or 13, wherein the first BWP is not a default or initial BWP.
The method according to any one of claims 12 to 14, wherein the third indication information is further used to indicate whether the network device has seized a channel on the first BWP.
The method according to claim 15, wherein after the terminal device switches to the first BWP according to the third instruction information, starting or restarting the BWP switching timer comprises:

If the third indication information indicates that the network device has not preempted the channel on the first BWP, the terminal device starts or restarts the BWP switching timer at the moment of switching to the first BWP.
The method of claim 16, wherein the method further comprises:

If the third indication information indicates that the network device preempts the channel on the first BWP, the terminal device stops the BWP switching timer at the moment when it switches to the first BWP.
A method for bandwidth part BWP switching, characterized in that the method includes:

The terminal device controls the BWP switching timer to time in a specific time period, and the specific time period is a time period during which the network device may transmit data to the terminal device;

When the BWP switching timer expires, the terminal device switches from the currently used first BWP to the second BWP.
The method according to claim 18, wherein the specific time period is the maximum channel occupation time MCOT of the network device.
The method according to claim 18, wherein the specific time period is within the MCOT of the network device.
The method according to any one of claims 18 to 20, wherein the method further comprises:

If the terminal device detects data transmission within the specific time period, restart the BWP switching timer at the moment when the data transmission is detected.
The method according to claim 21, wherein the terminal device detecting data transmission within the specific time period comprises:

The terminal device detects the data sent by the network device; and/or,

The terminal device detects, on the first BWP, a PDCCH scrambled by a cell radio network temporary identification C-RNTI or a configuration scheduling radio network temporary identification CS-RNTI that indicates downlink allocation or uplink authorization; and/or,

The terminal device detects a PDCCH scrambled by a C-RNTI or CS-RNTI indicating a downlink allocation or uplink grant for the first BWP; and/or,

The terminal device sends a MAC PDU in a configured uplink authorized resource, or receives a MAC PDU in a configured downlink allocated resource.
The method according to any one of claims 18 to 22, wherein the method further comprises:

Receiving, by the terminal device, first indication information, where the first indication information is used to instruct the network device to preempt a channel on the first BWP;

The terminal device determines the start time of the specific time period according to the first indication information.
The method according to claim 23, wherein the first indication information is a downlink control channel PDCCH.
The method according to claim 23, wherein the first indication information is a specific sequence.
The method according to claim 25, wherein the specific sequence is a demodulation reference signal DMRS.
The method according to any one of claims 18 to 26, wherein the method further comprises:

The terminal device receives second indication information, where the second indication information is used to indicate the length of the specific time period; or,

The terminal device obtains the pre-stored length of the specific time period.
The method according to any one of claims 18 to 27, wherein the second BWP is an initial or default BWP.
The method according to any one of claims 18 to 27, wherein the method further comprises:

Receiving, by the terminal device, third instruction information, where the third instruction information is used to instruct the terminal device to switch from a third BWP to the first BWP;

The terminal device starts or restarts the BWP switching timer after switching to the first BWP according to the third instruction information.
The method according to claim 29, wherein the third indication information is a downlink control signal DCI or radio resource control RRC signaling.
The method of claim 30, wherein the first BWP is not a default or initial BWP.
The method according to any one of claims 29 to 31, wherein the third indication information is further used to indicate whether the network device has seized a channel on the first BWP.
The method according to claim 32, wherein, after the terminal device switches to the first BWP according to the third instruction information, starting or restarting the BWP switching timer comprises:

If the third indication information indicates that the network device preempts the channel on the first BWP, the terminal device starts or restarts the BWP switching timer at the moment when it switches to the first BWP.
The method of claim 33, wherein the method further comprises:

If the third indication information indicates that the network device has not preempted the channel on the first BWP, the terminal device stops the BWP switching timer at the moment of switching to the first BWP.
A method for bandwidth part BWP switching, characterized in that the method includes:

If the terminal device does not detect data transmission in M specific time periods, it switches from the currently used first BWP to the second BWP. The specific time period is the time period during which the network device may transmit data to the terminal device, and M is a positive integer.
The method according to claim 35, wherein the specific time period is the maximum channel occupation time MCOT of the network device.
The method according to claim 35, wherein the specific time period is within the MCOT of the network device.
The method according to any one of claims 35 to 37, wherein the M MCOTs are consecutive M MCOTs.
The method according to any one of claims 35 to 37, wherein the M MCOTs comprise non-continuous MCOTs.
The method according to claim 39, wherein the time length between the discontinuous MCOTs is less than a preset time length.
The method according to any one of claims 35 to 40, wherein the method further comprises:

Receiving, by the terminal device, first indication information, where the first indication information is used to instruct the network device to preempt a channel on the first BWP;

The terminal device determines the start time of the specific time period according to the first indication information.
The method according to claim 41, wherein the first indication information is a downlink control channel PDCCH.
The method according to claim 41, wherein the first indication information is a specific sequence.
The method according to claim 43, wherein the specific sequence is a demodulation reference signal DMRS.
The method according to any one of claims 35 to 44, wherein the method further comprises:

The terminal device receives second indication information, where the second indication information is used to indicate the length of the specific time period; or,

The terminal device obtains the pre-stored length of the specific time period.
The method according to any one of claims 35 to 45, wherein the second BWP is an initial or default BWP.
The method according to any one of claims 35 to 46, wherein the terminal device fails to detect data transmission within M specific time periods, comprising:

The terminal device does not detect the data sent by the network device; and,

On the first BWP, the terminal device does not detect the PDCCH scrambled by the cell radio network temporary identifier C-RNTI or the configuration scheduling radio network temporary identifier CS-RNTI that indicates downlink allocation or uplink authorization; and,

The terminal device does not detect the PDCCH scrambled by the C-RNTI or CS-RNTI indicating the downlink allocation or uplink grant for the first BWP; and,

The terminal device does not send the MAC PDU in the configured uplink authorized resource, or does not receive the MAC PDU in the configured downlink allocated resource.
The method according to any one of claims 35 to 47, wherein the method further comprises:

Receiving, by the terminal device, third instruction information, where the third instruction information is used to instruct the terminal device to switch from a third BWP to the first BWP;

The terminal device switches to the first BWP according to the third instruction information.
The method according to claim 48, wherein the third indication information is a downlink control signal DCI or radio resource control RRC signaling.
The method according to claim 48 or 49, wherein the first BWP is not a default or initial BWP.
A terminal device, characterized in that it comprises:

A processing unit, configured to control the BWP handover timer to count outside a specific time period, where the specific time period is a time period during which the network device may transmit data to the terminal device;

The processing unit is further configured to switch from the currently used first BWP to the second BWP when the BWP switching timer expires.
The terminal device according to claim 51, wherein the specific time period is the maximum channel occupation time MCOT of the network device.
The terminal device according to claim 51, wherein the specific time period is located within the MCOT of the network device.
The terminal device according to claims 51 to 53, wherein the processing unit is further configured to:

If the terminal device detects data transmission within the specific time period, restart the BWP switching timer at the end of the specific time period in which the data transmission is detected.
The terminal device of claim 54, wherein the terminal device detecting data transmission within the specific time period comprises:

The terminal device detects the data sent by the network device; and/or,

The terminal device detects, on the first BWP, a PDCCH scrambled by a cell radio network temporary identification C-RNTI or a configuration scheduling radio network temporary identification CS-RNTI that indicates downlink allocation or uplink authorization; and/or,

The terminal device detects a PDCCH scrambled by a C-RNTI or CS-RNTI indicating a downlink allocation or uplink grant for the first BWP; and/or,

The terminal device sends a MAC PDU in a configured uplink authorized resource, or receives a MAC PDU in a configured downlink allocated resource.
The terminal device according to any one of claims 51 to 55, wherein the terminal device further comprises a transceiver unit,

The transceiving unit is configured to receive first indication information, where the first indication information is used to indicate that the network device has seized a channel on the first BWP;

The processing unit is further configured to determine the starting time of the specific time period according to the first indication information.
The terminal device according to claim 56, wherein the first indication information is a downlink control channel PDCCH.
The terminal device according to claim 56, wherein the first indication information is a specific sequence.
The terminal device according to claim 58, wherein the specific sequence is a demodulation reference signal DMRS.
The terminal device according to any one of claims 51 to 59, wherein the transceiver unit is further configured to:

Receiving second indication information, where the second indication information is used to indicate the length of the specific time period; or,

The processing unit is further configured to obtain the length of the pre-stored specific time period.
The terminal device according to any one of claims 51 to 60, wherein the second BWP is an initial or default BWP.
The terminal device according to any one of claims 51 to 60, wherein the transceiver unit is further configured to:

Receiving third indication information, where the third indication information is used to instruct the terminal device to switch from a third BWP to the first BWP;

The processing unit is further configured to start or restart the BWP switching timer after switching to the first BWP according to the third instruction information.
The terminal device according to claim 62, wherein the third indication information is a downlink control signal DCI or radio resource control RRC signaling.
The terminal device according to claim 62 or 63, wherein the first BWP is not a default or initial BWP.
The terminal device according to any one of claims 62 to 64, wherein the third indication information is further used to indicate whether the network device has seized a channel on the first BWP.
The terminal device according to claim 65, wherein the processing unit is specifically configured to:

If the third indication information indicates that the network device has not preempted the channel on the first BWP, the terminal device starts or restarts the BWP switching timer at the moment of switching to the first BWP.
The terminal device according to claim 66, wherein the processing unit is further configured to:

If the third indication information indicates that the network device has seized the channel on the first BWP, the BWP switching timer is stopped at the moment of switching to the first BWP.
A terminal device, characterized in that the terminal device includes:

A processing unit, configured to control the BWP switching timer to time in a specific time period, and the specific time period is a time period during which a network device may transmit data to a terminal device;

The processing unit is further configured to switch from the currently used first BWP to the second BWP when the BWP switching timer expires.
The terminal device according to claim 68, wherein the specific time period is the maximum channel occupation time MCOT of the network device.
The terminal device according to claim 68, wherein the specific time period is located within the MCOT of the network device.
The terminal device according to claims 68 to 70, wherein the processing unit is further configured to:

If the terminal device detects data transmission within the specific time period, restart the BWP switching timer at the moment when the data transmission is detected.
The terminal device according to claim 71, wherein the terminal device detecting data transmission within the specific time period comprises:

The terminal device detects the data sent by the network device; and/or,

The terminal device detects, on the first BWP, a PDCCH scrambled by a cell radio network temporary identification C-RNTI or a configuration scheduling radio network temporary identification CS-RNTI that indicates downlink allocation or uplink authorization; and/or,

The terminal device detects a PDCCH scrambled by a C-RNTI or CS-RNTI indicating a downlink allocation or uplink grant for the first BWP; and/or,

The terminal device sends a MAC PDU in a configured uplink authorized resource, or receives a MAC PDU in a configured downlink allocated resource.
The terminal device according to any one of claims 68 to 72, wherein the terminal device further comprises a transceiver unit,

The transceiving unit is configured to receive first indication information, where the first indication information is used to indicate that the network device has seized a channel on the first BWP;

The processing unit is further configured to determine the starting time of the specific time period according to the first indication information.
The terminal device according to claim 73, wherein the first indication information is a downlink control channel PDCCH.
The terminal device according to claim 73, wherein the first indication information is a specific sequence.
The terminal device according to claim 75, wherein the specific sequence is a demodulation reference signal DMRS.
The terminal device according to any one of claims 68 to 76, wherein the transceiver unit is further configured to:

Receiving second indication information, where the second indication information is used to indicate the length of the specific time period; or,

The processing unit is further configured to obtain the length of the pre-stored specific time period.
The terminal device according to any one of claims 68 to 77, wherein the second BWP is an initial or default BWP.
The terminal device according to any one of claims 68 to 78, wherein the transceiver unit is further configured to:

Receiving third indication information, where the third indication information is used to instruct the terminal device to switch from a third BWP to the first BWP;

The processing unit is further configured to start or restart the BWP switching timer after switching to the first BWP according to the third instruction information.
The terminal device according to claim 79, wherein the third indication information is a downlink control signal DCI or radio resource control RRC signaling.
The terminal device according to claim 80, wherein the first BWP is not a default or initial BWP.
The terminal device according to claim 81, wherein the third indication information is further used to indicate whether the network device has seized a channel on the first BWP.
The terminal device according to claim 82, wherein the processing unit is specifically configured to:

If the third indication information indicates that the network device preempts the channel on the first BWP, start or restart the BWP switching timer at the moment of switching to the first BWP.
The terminal device according to claim 83, wherein the processing unit is further configured to:

If the third indication information indicates that the network device has not preempted the channel on the first BWP, stop the BWP switching timer at the moment of switching to the first BWP.
A terminal device, characterized in that the terminal device includes:

The processing unit is configured to switch from the currently used first BWP to the second BWP when the terminal device does not detect data transmission in M specific time periods, where the specific time period is a time period during which the network device may transmit data to the terminal device, M is a positive integer.
The terminal device according to claim 85, wherein the specific time period is the maximum channel occupation time MCOT of the network device.
The terminal device according to claim 85, wherein the specific time period is located within the MCOT of the network device.
The terminal device according to claims 85 to 87, wherein the M MCOTs are consecutive M MCOTs.
The terminal device according to claims 85 to 87, wherein the M MCOTs comprise non-continuous MCOTs.
The terminal device according to claim 89, wherein the time length between the discontinuous MCOTs is less than a preset time length.
The terminal device according to any one of claims 85 to 90, wherein the terminal device further comprises a transceiver unit,

The transceiving unit is configured to receive first indication information, where the first indication information is used to indicate that the network device has seized a channel on the first BWP;

The processing unit is further configured to determine the starting time of the specific time period according to the first indication information.
The terminal device according to claim 91, wherein the first indication information is a downlink control channel PDCCH.
The terminal device according to claim 91, wherein the first indication information is a specific sequence.
The terminal device according to claim 93, wherein the specific sequence is a demodulation reference signal DMRS.
The terminal device according to any one of claims 85 to 94, wherein the transceiver unit is further configured to:

Receiving second indication information, where the second indication information is used to indicate the length of the specific time period; or,

The processing unit is further configured to obtain the length of the pre-stored specific time period.
The terminal device according to any one of claims 85 to 95, wherein the second BWP is an initial or default BWP.
The terminal device according to any one of claims 85 to 96, wherein the terminal device does not detect data transmission within M specific time periods, comprising:

The terminal device does not detect the data sent by the network device; and,

On the first BWP, the terminal device does not detect the PDCCH scrambled by the cell radio network temporary identifier C-RNTI or the configuration scheduling radio network temporary identifier CS-RNTI that indicates downlink allocation or uplink authorization; and,

The terminal device does not detect the PDCCH scrambled by the C-RNTI or CS-RNTI indicating the downlink allocation or uplink grant for the first BWP; and,

The terminal device does not send the MAC PDU in the configured uplink authorized resource, or does not receive the MAC PDU in the configured downlink allocated resource.
The terminal device according to any one of claims 85 to 97, wherein the transceiver unit is further configured to:

Receiving third indication information, where the third indication information is used to instruct the terminal device to switch from a third BWP to the first BWP;

The processing unit is further configured to switch to the first BWP according to the third instruction information.
The terminal device according to claim 98, wherein the third indication information is a downlink control signal DCI or radio resource control RRC signaling.
The terminal device according to claim 98 or 99, wherein the first BWP is not a default or initial BWP.
A terminal device, characterized in that the terminal device 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 execute claim 1. The method of any one of claims 17 to 17, the method of any one of claims 18 to 34, or the method of any one of claims 35 to 50.
A chip, characterized in that the chip includes a processor, and the processor is used to call and run a computer program from a memory, so that a device installed with the chip executes the method described in any one of claims 1 to 17 The method, the method of any one of claims 18 to 34, or the method of any one of claims 35 to 50.
A computer-readable storage medium, characterized in that it is used to store a computer program that enables a computer to execute the method described in any one of claims 1 to 17, and the method described in any one of claims 18 to 34 Or the method of any one of claims 35 to 50.
A computer program product, characterized by comprising computer program instructions that cause a computer to execute the method according to any one of claims 1 to 17 and the method according to any one of claims 18 to 34 Or the method according to any one of claims 35 to 50.
A computer program, characterized in that the computer program causes the computer to execute the method according to any one of claims 1 to 17, the method according to any one of claims 18 to 34, or the claims The method of any one of 35 to 50.