CN112600633A

CN112600633A - BWP switching method and terminal equipment

Info

Publication number: CN112600633A
Application number: CN202011480664.4A
Authority: CN
Inventors: 王燕
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-04-02
Anticipated expiration: 2040-12-15
Also published as: CN112600633B

Abstract

The embodiment of the invention discloses a method for switching BWP (broadband wireless protocol) and terminal equipment, which are applied to the technical field of communication and can solve the problems that signals can be interfered, SINR (signal to interference ratio) can be reduced, parameters such as data transmission quality can be reduced, and the operation of the terminal equipment can be influenced in the operation process of the terminal equipment. The method comprises the following steps: detecting a first signal-to-noise ratio (SINR) of the terminal device when the terminal device works in a first partial bandwidth BWP; if the first SINR is smaller than a first preset threshold, sending a BWP switching request message to the network equipment; the BWP handover request message is used to request the network device to handover to a second BWP, where the second BWP is a BWP whose historical SINR is greater than a second preset threshold, and the second preset threshold is greater than or equal to the first preset threshold.

Description

BWP switching method and terminal equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method for switching BWPs and a terminal device.

Background

At present, a terminal device performs BWP switching according to a reconfiguration message or a Downlink Control Information (DCI) instruction issued by a network device. In the operation process of the terminal device, signals may be interfered, at this time, SINR may be reduced, parameters such as data transmission quality may also be reduced, and the operation of the terminal device may be affected.

Disclosure of Invention

Embodiments of the present invention provide a method for switching BWP and a terminal device, so as to solve the problem in the prior art that when the terminal device is interfered by other devices, SINR decreases, and at this time, operation of the terminal device is affected.

In order to solve the above technical problem, the embodiment of the present invention is implemented as follows:

in a first aspect, a method for switching BWP is provided, which detects a first signal-to-noise ratio SINR of the terminal device when operating in a first fractional bandwidth BWP;

if the first SINR is smaller than a first preset threshold, sending a BWP switching request message to network equipment;

the BWP handover request message is used to request the network device to handover to a second BWP, where the second BWP is a BWP whose historical SINR is greater than a second preset threshold, and the second preset threshold is greater than or equal to the first preset threshold.

In a second aspect, a terminal device is provided, which includes:

a processing module, configured to detect a first signal-to-noise ratio SINR of the terminal device when operating in a first fractional bandwidth BWP;

a sending module, configured to send a BWP handover request message to a network device if the first SINR is less than a first preset threshold;

In a third aspect, a terminal device is provided, including: a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing a method of switching BWP as described in the first aspect.

In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the method of switching BWP as in the first aspect.

The embodiment of the present invention provides a method for switching BWP, where when a terminal device operates in a first partial bandwidth BWP, the terminal device may detect a first signal-to-noise ratio SINR; if the first SINR is less than the first preset threshold, the terminal device may send a BWP handover request message to the network device; the BWP handover request message is used to request the network device to handover to a second BWP, where the second BWP is a BWP whose historical SINR is greater than a second preset threshold, and the second preset threshold is greater than or equal to the first preset threshold. By the scheme, the terminal device may detect whether the first SINR is less than a first preset threshold, and when the first SINR is less than the first preset threshold, that is, a signal of the terminal device is interfered and the SINR is reduced, at this time, the terminal device may send a BWP handover request message for requesting handover to a second BWP to the network device, so that the terminal device may handover to a second BWP with a larger SINR. Therefore, when the signal is interfered and the SINR is reduced, the terminal device may actively request BWP handover, and thus may switch to BWP with higher SINR, so that the terminal device may operate in an environment with faster data transmission.

Drawings

Fig. 1 is a schematic diagram of a 5G application scenario provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a BWP allocation provided by an embodiment of the present invention;

fig. 3 is a block diagram of a wireless communication system according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a method for switching BWPs according to an embodiment of the present invention;

fig. 5 is a first schematic structural diagram of a terminal device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a hardware structure of a terminal device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

First, the related technical content of the embodiment of the invention is introduced:

signal to Interference plus Noise Ratio (SINR), which means the Ratio of the received Signal strength of a useful Signal to the received Signal strength of an interfering Signal (Noise and Interference); this can be simply understood as "signal-to-noise ratio".

The SINR is often applied to an interference cancellation technique, and data with a large SINR (layered) may be decoded first, and then decoded data is subtracted (cancelled) during decoding later, and so on until all data are decoded. In this technique, SINR is an important parameter.

In the Multiple Input Multiple Output (MIMO) technique proposed in 3GPP, a Channel Quality Indicator (CQI) is required to feed back channel characteristics to a transmitter, so as to adjust the data rate of a transmitting antenna and implement adaptive modulation. The channel matrix is most suitable if the full characteristics of the channel can be estimated and fed back. However, in practical systems, especially in MIMO systems, it is not practical to estimate the channel matrix accurately and timely, and the feedback information is limited by the feedback channel and may not be too much. Therefore, in the proposals of 3GPP, SINR is often used as a control parameter for feedback information.

The SINR becomes an important index of the receiver, and imposes higher requirements on the sensitivity and the anti-interference capability of the device. A Code Division Multiple Access (CDMA) system is an interference-limited system, and multi-user interference in the system has a large influence on the system, and the SINR needs to be considered in specific design. This is because the spreading codes of the CDMA system are not completely orthogonal and have a certain correlation value, and when the terminal positions of multiple users are relatively close, the interference between the terminals is relatively large. Meanwhile, since the frequencies used by the CDMA base stations are the same, interference may exist between different base stations.

Currently, the conventional expression of SINR is: SINR is Signal/(Interference + Noise).

Where Signal is the measured power of the useful Signal, the signals and channels of primary interest include: RS, PDSCH; the Interference is the measured power of the signal or the channel Interference signal, including the Interference of other cells of the system and the Interference of different systems: noise is Noise, which is related to the specific measurement bandwidth and the receiver Noise figure.

Partial BandWidth (BWP) is one of the most critical concepts that 5G differs from 4G, and BWP can be called "slice" of wireless resources, which can make 5G flexibly support various types of terminal devices in various scenarios.

A big difference between 5G and 4G is that the carrier spectrum bandwidth of 5G is larger than that of 4G. The following first says from 4G:

the 3GPP R7 protocol specifies that the carrier bandwidth of 4G is 20MHz at most; carrier aggregation is introduced at R10, a maximum of 5 carriers are supported, and the maximum operating bandwidth of 4G is extended to 100 MHz. This bandwidth can support a peak download rate of 1 Gbps. In the enhanced standard (i.e., LTE Advanced Pro) version of 3GPP, the maximum number of carrier aggregation is increased to 32, so that the 4G can support a bandwidth of 640MHz altogether, and a network device (base station) as a system device with a large volume and strong performance can support such a large bandwidth, and a terminal device that can communicate with the base station cannot support such a large bandwidth as multiple carriers due to the limitations of transmission power and endurance capability, so that at present, even a high-end 4G mobile phone usually supports at most 5 carrier aggregation, and supports a bandwidth of 100MHz at most.

With the arrival of 5G, the carrier bandwidth has been expanded more. Each carrier can support 100MHz at most, millimeter waves even reach 400MHz per carrier, and 5G can support 16 carrier aggregation at most according to the protocol, so that 5G can support a super-large frequency spectrum bandwidth of 1.6GHz to 6.4GHz at most.

Fig. 1 is a schematic diagram of an application scenario of 5G, and although the larger the spectral bandwidth is, the higher the peak rate can be supported, the initial requirement of 5G is to satisfy three important scenarios described by the triangle vertices shown in fig. 1: enhanced Mobile Broadband (eMBB), Massive machine type Communication (mMTC), Ultra-Reliable and Low Latency Communication (uRLLC).

1. eMBB: high transmission rates are required.

2. mMTC: in the 5G era, everything is interconnected, and various Internet of things applications such as smart cities and smart families are needed.

3. And (3) uRLLC: industrial automation, automatic driving, and the like are future trends.

The ultra-large frequency spectrum bandwidth is only suitable for an eMBB scene, and the Internet of things vertical industry scenes such as mMTC and uRLLC do not need too high speed, and do not need too large bandwidth. That is, from 5G, the mobile phone is no longer the most important type of terminal device, and more are smart water meter, smart electric meter, smart air conditioner, unmanned aerial vehicle, auto-pilot automobile, industrial robot, etc., and what these terminal devices need may not be high download rate, but low cost, large connection, low time delay, high reliability, etc.

Based on this requirement of the 5G scenario, if all types of terminal devices are made to support large bandwidth, the cost is very high. Even for terminal devices such as mobile phones, the service rate of common applications such as telephone, instant messaging (WeChat), online games and small video streams is not high, and the service bearer can be satisfied by using carriers of 5MHz or less. Because the transmitting power of the terminal equipment is generally not high, if signals are transmitted on a large frequency spectrum, limited power can be dispersed to a large bandwidth, so that energy is excessively dispersed (power spectrum density is low), uplink coverage is seriously affected, and the point is obviously reflected on the terminal equipment of the internet of things. In addition, the number of the terminal devices of the internet of things is very large, the requirement on the speed is low, and the goal of 5G ten-thousand-object interconnection is to achieve millions of connections per square kilometer, so that the cost of the terminal devices is required to be low, and large bandwidth does not need to be supported.

Based on these considerations, 5G introduces the concept of BWP, with the intuitive understanding of "fractional bandwidth". With BWP, the terminal device does not need to support the whole 5G carrier bandwidth, and can use 5G service by taking out a small segment of the carrier in 5G, where BWP is equivalent to dividing the 5G spectrum into many small blocks within a certain time, each BWP can use different parameter sets, and its bandwidth, subcarrier spacing, and other control parameters can be different, which is equivalent to dividing several configured different sub-cells within the 5G cell to adapt to different types of terminal devices and different service types.

Fig. 2 is a schematic diagram of BWP allocation. The bandwidth of BWP1 is 40MHz, the bandwidth is larger, but the duration is short; BWP2 has a bandwidth of 10MHz, the bandwidth is relatively small but the duration is long; the bandwidth of BWP3 is 20 MHz.

Illustratively, at the first moment, the terminal device is downloading the game installation package file, requiring a higher rate, and the network device may configure the terminal device with a large bandwidth BWP (i.e., BWP 1); at the second moment, the terminal device is playing an online game, the required flow is small, and at this moment, the network device configures a small-bandwidth BWP (namely BWP2) for the terminal device to meet the uplink and downlink speed requirements of the game; at the third moment, the network device finds that the bandwidth of BWP1 is subjected to strong bursty external interference, the signal quality is rapidly deteriorated, and the requirement of the terminal device for accessing the internet cannot be met, so that a new bandwidth (i.e., BWP3) can be configured to the terminal device urgently. A maximum of 4 BWPs can be supported by one terminal, but only one terminal is active at a time. Therefore, the spectrum resources can be used as required, and the terminal equipment does not need to work on the whole carrier bandwidth like 4G, so that the method is more flexible and saves more power.

The BWP switching method provided in the embodiment of the present invention may be applied to an architecture diagram shown in fig. 3, where the network device may include a core network device and a base station.

The base station in fig. 3 may configure a first partial bandwidth BWP for the terminal device, and may detect a first signal-to-noise ratio SINR when operating in the first BWP; if the first SINR is less than the first preset threshold, the terminal device may send a BWP handover request message to the network device; the BWP handover request message is used to request the network device to handover to a second BWP, where the second BWP is a BWP whose historical SINR is greater than a second preset threshold, and the second preset threshold is greater than or equal to the first preset threshold. By the scheme, the terminal device may detect whether the first SINR is less than a first preset threshold, and when the first SINR is less than the first preset threshold, that is, a signal of the terminal device is interfered and the SINR is reduced, at this time, the terminal device may send a BWP handover request message for requesting handover to a second BWP to the network device, so that the terminal device may handover to a second BWP with a larger SINR. Therefore, when the signal is interfered and the SINR is reduced, the terminal device may actively request BWP handover, and thus may switch to BWP with higher SINR, so that the terminal device may operate in an environment with faster data transmission.

It should be noted that the architecture diagram of the wireless communication system shown in fig. 3 is only an exemplary illustration, and in practice, the system may include more terminal devices or network devices, and the embodiment of the present invention is not limited thereto.

Optionally, the indication Information in the embodiment of the present invention includes physical layer signaling, for example, at least one of Downlink Control Information (DCI), Radio Resource Control (RRC) signaling, and Media Access Control Element (MAC CE).

Optionally, the high layer parameter or the high layer signaling in the embodiment of the present invention includes at least one of a Radio Resource Control (RRC) signaling and a Media Access Control Element (MAC CE).

In this embodiment, the terminal device may be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, a user equipment, or the like.

The terminal device may be a Station (ST) in a WLAN, and may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next generation communication system such as an NR Network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) Network, and the like.

In the embodiment of the invention, the terminal equipment can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface, such as a ship and the like; and may also be deployed in the air, such as airplanes, balloons, satellites, and the like.

In the embodiment of the present invention, the terminal device may be a Mobile Phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self driving (self driving), a wireless terminal device in remote medical (remote medical), a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in city (smart city), a wireless terminal device in smart home (smart home), or the like.

By way of example, and not limitation, in embodiments of the present invention, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

The network device related to the embodiment of the invention can be an access network device. The access network device may be a long-term evolution (LTE) system, a next-generation mobile communication system (NR), or an evolved base station (evolved Node B) in an authorized assisted access long-term evolution (LAA-LTE) system, such as a macro base station, a micro base station (also referred to as a "small base station"), a pico base station, an Access Point (AP), a Transmission Point (TP), or a new generation base station (new generation Node B).

In this embodiment of the present invention, the network device may be a device for communicating with a mobile device, and the network device may be an Access Point (AP) in a WLAN, a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB, NB) in WCDMA, an evolved Node B (eNB or eNodeB) in LTE, a relay Station or an Access Point, a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network, or a network device in a PLMN network for future evolution, or a network device in an NTN network.

In this embodiment of the present invention, a network device may provide a service for a cell, and a terminal device communicates with the network device through a transmission resource (e.g., a frequency domain resource or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (e.g., a base station), and the cell may belong to a macro base station or a base station corresponding to a Small cell (Small cell), and the Small cell may include: urban cells (Metro cells), Micro cells (Micro cells), Pico cells (Pico cells), Femto cells (Femto cells), and the like, and the small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-rate data transmission services.

The technical scheme of the embodiment of the invention can be applied to various communication systems, such as: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an Advanced Long Term Evolution (LTE-A) System, a New Radio (NR) System, an Evolution System of an NR System, an LTE (LTE-based Access to unlicensed spectrum, an LTE-U) System on an unlicensed spectrum, an NR (NR-based Access to unlicensed spectrum, an NR-U) System on an unlicensed spectrum, a Non-Terrestrial communication network (UMTS-based network, UMTS) System, a Universal Mobile telecommunications network (UMTS) System, WLAN), Wireless Fidelity (WiFi), a fifth Generation communication (5th-Generation, 5G) system, or other communication systems, etc.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an associative relationship that describes an associated object, meaning that three relationships may exist, e.g., a, and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship. It should be understood that "indication" mentioned in the embodiments of the present application may be a direct indication, an indirect indication, or an indication of an association relationship. For example, a indicates B, which may mean that a directly indicates B, e.g., B may be obtained by a; it may also mean that a indicates B indirectly, for example, a indicates C, and B may be obtained by C; it can also mean that there is an association between a and B. In the description of the embodiments of the present invention, the term "correspond" may indicate that there is a direct correspondence or an indirect correspondence between the two, may also indicate that there is an association between the two, and may also indicate and be indicated, configure and configured, and so on.

The execution subject of the method for switching a BWP provided in the embodiment of the present invention may be the terminal device described above, or may also be a functional module and/or a functional entity capable of implementing the method for switching a BWP in the terminal device, which may be determined specifically according to actual usage requirements, and the embodiment of the present invention is not limited thereto. The following takes a terminal device as an example to exemplarily describe the method for switching BWP according to an embodiment of the present invention.

The method for switching the BWP provided by the embodiment of the invention can be applied to the scene of switching the BWP by the terminal equipment.

As shown in fig. 4, an embodiment of the present invention provides a method for switching BWPs, which may include the following steps:

401. the network device indicates the first BWP to the terminal device.

In the embodiment of the present invention, the network device may pre-configure one BWP or multiple BWPs to the terminal device.

Alternatively, the network device may indicate the first BWP to the terminal device through the indication information.

Optionally, when the network device configures four BWPs for the terminal device, a certain BWP may be indicated by 2 bits.

Optionally, the network device may configure BWP to the terminal device through an RRC reconfiguration message.

Illustratively, assuming that the network device is preconfigured with BWP1, BWP2, BWP3 and BWP4 for the end device, when 2bit is used to indicate these four BWPs respectively, BWP1 may be represented by 00, BWP2 may be represented by 01, and BWP3 may be represented by 10, BWP4 may be represented by 11.

Illustratively, assuming that the first BWP is BWP1, the network device may carry field 00 in the indication information to indicate the first BWP to the end device.

402. The terminal device obtains a first SINR.

In the embodiment of the invention, when the terminal device works in the first BWP, the terminal device obtains the current first SINR.

403. The terminal equipment detects whether the first SINR is smaller than a first preset threshold.

In this embodiment of the present invention, if the first SINR is less than the first preset threshold, the terminal device may perform the following step 404; if the first SINR is not less than the first preset threshold, the terminal device may return to perform step 402.

Optionally, the terminal device may set an SINR threshold at an upper layer, where the SINR threshold may be denoted as bwpswitch sinrthreshold.

Optionally, in order to prevent the SINR of the terminal device from varying around the threshold, which results in frequent handover of the terminal device, the terminal device may further set a hysteresis parameter, which may be denoted as bwpswitchsinhysteresis.

In the terminal device, the upper Layer may be a wireless Access Point (AP) Layer, and may compare an SINR of an Internet Layer (Internet Layer, IP Layer) with an SINR threshold set by the AP Layer to determine whether the SINR is smaller than a first preset threshold.

Optionally, the first preset threshold may be BWPswitchSINRthreshold, which may be BWPswitchSINRthreshold-bwpswitchsinrysistesis after setting the hysteresis parameter.

Illustratively, it is assumed that bwpswitch sinrthreshold is 0dB, bwpswitch sinrythesis is 2dB, the first BWP configured by the network device to the terminal device is 20M, and the current SINR of the terminal device is-3 dB. Then the first predetermined threshold is 0dB-2dB and the SINR of the terminal device is-3 dB, which is less than the first predetermined threshold, then the terminal device may perform step 404 as follows.

Illustratively, assuming that the SINR threshold is 0dB, the hysteresis parameter is 2dB, the first BWP configured by the network device to the terminal device is 20M, and the current SINR of the terminal device is 3 dB. Then the first preset threshold is 0dB-2dB, and the SINR of the terminal device is 3dB, which is greater than the first preset threshold, then the terminal device may return to perform step 402.

Optionally, the terminal device may adjust the first preset threshold according to different requirements of different scenes on power consumption and transmission quality.

In the scene of high transmission quality requirement, the terminal device may increase the first preset threshold, so that the massage device may be switched to the BWP with higher SINR in time, which may ensure real-time communication quality and improve user experience.

For example, assuming that the user is playing a game using the terminal device, the requirement of the terminal device for the transmission quality is high, and the terminal device may switch to BWP with high SINR.

In the scenario of low transmission quality requirement, the terminal device may decrease the first preset threshold, so that the terminal device may switch BWP only when BWP with higher SINR exists in the history, which may avoid unnecessary BWP switching to reduce power consumption of the terminal device.

For example, assuming that the user is using the terminal device to look into novel, the requirement of the terminal device for the transmission quality may be low, and the terminal device may switch to BWP with a high SINR.

404. The terminal device transmits a BWP handover request message to the network device.

In the embodiment of the present invention, if the first SINR is less than the first preset threshold, the terminal device sends a BWP handover request message to the network device.

Wherein the BWP handover request message is for requesting a handover to a second BWP from the network device.

Optionally, the second BWP is a BWP with a historical SINR greater than a second preset threshold.

Optionally, the second preset threshold may be BWPswitchSINRthreshold, and after setting the hysteresis parameter, the second preset threshold may be BWPswitchSINRthreshold + bwpswitchsinrysistesis.

It should be noted that the second preset threshold may be greater than or equal to the first preset threshold.

Illustratively, assume that BWPswitchSINRthreshold is 0dB, BWPswitchSINRhysesis is 2dB, and the SINR of the second BWP is 3 dB. Then the second preset threshold is 0dB +2 dB-2dB, and the SINR of the second BWP is 3dB, which is greater than the second preset threshold, then the terminal device may request the network device to switch to the second BWP.

Optionally, the terminal device may load the identifier of the second BWP in the MAC CE and/or Uplink Control Information (UCI), and send the identifier to the network device.

Optionally, if the first SINR is smaller than the first preset threshold, the sending, by the terminal device, a BWP handover request message to the network device may include:

a first alternative implementation: if the first SINR is smaller than a first preset threshold and the terminal device is preconfigured with N third BWPs, detecting historical SINRs of the N third BWPs, wherein N is an integer greater than or equal to 2; determining a second BWP among the N third BWPs, and the terminal device transmitting a BWP handover request message to the network device.

It should be noted that, the network device may configure a plurality of third BWPs to the terminal device first, when the first SINR is less than the first preset threshold, the terminal device may detect SINRs of the plurality of third BWPs, determine, as the second BWP, a BWP in the plurality of third BWPs whose SINR is greater than the second preset threshold, and the terminal device may send a BWP handover request message for switching to the second BWP to the network device.

Illustratively, assuming that the first preset threshold is-1 dB, the second preset threshold is 3dB, the network device configures BWP1, BWP2, BWP3, BWP4 to the terminal device in advance, where the SINR of BWP1 is 0dB, the SINR of BWP2 is-2 dB, the SINR of BWP3 is 4dB, and the SINR of BWP4 is 1 dB. The current first SINR of the terminal device is-2 dB, which is smaller than the first preset threshold, the terminal device may detect the historical SINR of BWP1, BWP2, BWP3, BWP4 preconfigured by the terminal device, where the SINR of BWP3 is 4dB, the terminal device may determine BWP3 with the SINR of 4dB as the second BWP, and may request the network device to switch to the second BWP with the SINR of 4 dB.

A second alternative implementation: and if the first SINR is smaller than a first preset threshold and the first time length is larger than a preset time length, the terminal equipment sends a BWP switching request message to the network equipment.

The first duration is a duration that the first SINR is less than a first preset threshold.

It should be noted that, when the first SINR is less than the first preset threshold, the terminal device may detect a duration that the first SINR is less than the first preset threshold, and when the duration that the first SINR is less than the first preset threshold is greater than a preset duration, the terminal device may send a BWP handover request message for switching to the second BWP to the network device.

The preset duration may be set by the terminal device according to different requirements of the current scene on the transmission quality.

Illustratively, assuming that the preset duration is 5s, the first preset threshold is-1 dB, and the second preset threshold is 3dB, the network device configures a BWP1 with SINR 4dB to the terminal device in advance. The terminal device may request the network device to switch to a second BWP with SINR of 4dB if the terminal device detects that the duration of the first SINR being less than the first preset threshold is 8s and the current first SINR is-2 dB and is less than the first preset threshold.

In this optional implementation manner, when the duration that the first SINR is less than the first preset threshold is greater than the preset duration, the terminal device may request to switch to the second BWP whose historical SINR is greater than the second preset threshold, so that the data transmission quality of the terminal device may be improved.

A third alternative implementation: if the first SINR is smaller than a first preset threshold and the terminal device is pre-configured with M fourth BWPs, determining priorities of the M fourth BWPs; determining K fourth BWPs with the priority greater than the preset priority from the M fourth BWPs according to the priorities of the M fourth BWPs; if there are T fourth BWPs in the K fourth BWPs, where the historical SINR is greater than the second preset threshold, the terminal device determines a second BWP in the T fourth BWPs, and sends a BWP handover request message to the network device.

The second BWP is the BWP with the largest historical SINR in the T fourth BWPs, M, K and T are integers which are larger than or equal to 2, M is larger than or equal to K, and K is larger than or equal to T.

Optionally, the priority of the fourth BWP may be:

(1) when configuring BWPs to a terminal device, a network device configures BWPs corresponding to different BWPs, where each BWP corresponds to a priority, and the priorities of the BWPs may be the same or different.

(2) The terminal device is set according to the bandwidth of each BWP.

(3) The terminal device is set according to the SINR of each BWP.

It should be noted that, if the current first SINR of the terminal device is smaller than the first preset threshold, the terminal device may determine the priorities of a plurality of preconfigured fourth BWPs; according to the priority of the fourth BWP, a plurality of fourth BWPs having priorities greater than the preset priority may be determined; the terminal device may select a fourth BWP having an SINR greater than the second preset threshold again from among the fourth BWPs having priorities greater than the preset priority, and determine a BWP having a SINR greater than the second preset threshold, where the BWP having the highest SINR is the second BWP, and the terminal device may transmit a BWP handover request message for switching to the second BWP to the network device.

Illustratively, it is assumed that the network device configures BWP1, BWP2, BWP3, BWP4 to the terminal device in advance, where the SINR of BWP1 is 0dB, the priority is 1 level, the SINR of BWP2 is-2 dB, the priority is 2 level, the SINR of BWP3 is 4dB, the priority is 3 level, the SINR of BWP4 is 6dB, the priority is 4 level, the first preset threshold is-1 dB, the second preset threshold is 3dB, and the preset priority is 1 level (10 level is highest priority). The current first SINR of the terminal device is-2 dB, which is smaller than the first preset threshold, then the terminal device may determine the priority of the preconfigured BWP1, BWP2, BWP3, BWP4, where the priority of BWP2, BWP3, BWP4 is greater than 1 level, then the terminal device may detect the SINR of BWP2, BWP3, BWP4, where the SINR of BWP3, BWP4 is greater than 3dB, then the terminal device may determine BWP4 with SINR of 6dB as the second BWP, and request the network device to switch to the second BWP with SINR of 6 dB.

In this optional implementation manner, the terminal device may determine, among a plurality of fourth BWPs with the first SINR greater than the first preset threshold, a plurality of fourth BWPs with priorities greater than the preset priority, select, as the second BWP, the BWP with the highest SINR, and request the network device to switch to the second BWP, and the terminal device may switch to the BWP with the SINR greater than the second preset threshold and the highest priority, so that the best applicable BWP may be selected, and the data transmission quality of the terminal device is improved. A fourth alternative implementation: if the first SINR is smaller than a first preset threshold and the terminal device is pre-configured with P fifth BWPs, detecting historical SINR of the P fifth BWPs; and if the historical SINR of the Q fifth BWPs in the historical SINR of the P fifth BWPs is greater than a second preset threshold, the terminal device selects a second BWP from the Q fifth BWPs, and sends a BWP switching request message to the network device.

The second BWP is the BWP with the largest historical SINR in the Q fifth BWPs, P and Q are integers which are larger than or equal to 2, and P is larger than or equal to Q.

It should be noted that, if the current first SINR of the terminal device is less than the first preset threshold, the terminal device may detect SINRs of a plurality of preconfigured fifth BWPs, and when the SINR of the plurality of fifth BWPs is greater than the second preset threshold, the terminal device may determine, as the second BWP, the BWP with the largest SINR among the fifth BWPs with the SINRs greater than the second preset threshold, and send a BWP handover request message for switching to the second BWP to the network device.

Illustratively, it is assumed that the network device configures BWP1, BWP2, BWP3, BWP4 to the terminal device in advance, where the SINR of BWP1 is 0dB, the SINR of BWP2 is-2 dB, the SINR of BWP3 is 4dB, the SINR of BWP4 is 6dB, the first preset threshold is-1 dB, and the second preset threshold is 3 dB. The current first SINR of the terminal device is-2 dB, which is smaller than the first preset threshold, the terminal device may detect SINRs of BWP1, BWP2, BWP3, and BWP4, where the SINRs of BWP3 and BWP4 are greater than 3dB, and the terminal device may determine BWP4 with the SINR of 6dB as the second BWP, and request the network device to switch to the second BWP with the SINR of 6 dB.

In this optional implementation manner, the terminal device may select, as the second BWP, a BWP with the highest SINR among a plurality of fifth BWPs with the first SINR greater than the first preset threshold, and request the network device to switch to the second BWP, and the terminal device may switch to the BWP with the highest SINR, so as to select the most applicable BWP, improve the data transmission quality of the terminal device, and stabilize the signal.

A fifth alternative implementation: if the first SINR is smaller than a first preset threshold and the terminal device is pre-configured with A sixth BWPs, detecting historical SINR of the A sixth BWPs; b sixth BWPs of which the historical SINR is larger than a second preset threshold are determined from the A sixth BWPs according to the historical SINR of the A sixth BWPs; if there are C sixth BWPs with priority greater than the preset priority in the B sixth BWPs, the terminal device determines a second BWP in the C sixth BWPs and sends a BWP handover request message to the network device.

The second BWP is the BWP with the highest priority in the C sixth BWPs, A, B and C are integers which are more than or equal to 2, A is more than or equal to B, and B is more than or equal to C.

Optionally, the priority of the sixth BWP may be:

(2) The terminal device is set according to the bandwidth of each BWP.

(3) The terminal device is set according to the SINR of each BWP.

It should be noted that, if the current first SINR of the terminal device is less than the first preset threshold, the terminal device may detect SINRs of a plurality of preconfigured sixth BWPs, and according to the SINR of the sixth BWP, may determine that the SINRs are greater than the sixth BWP of the second preset threshold; the terminal device may select a sixth BWP having a priority greater than the preset priority again from the sixth BWPs having SINR greater than the second preset threshold, determine a BWP having a highest priority from the sixth BWPs having a priority greater than the preset priority as the second BWP, and send a BWP handover request message for switching to the second BWP to the network device.

Illustratively, it is assumed that the network device configures BWP1, BWP2, BWP3, BWP4 to the terminal device in advance, where the SINR of BWP1 is 5dB, the priority is 2 level, the SINR of BWP2 is-2 dB, the priority is 1 level, the SINR of BWP3 is 4dB, the priority is 3 level, the SINR of BWP4 is 6dB, the priority is 4 level, the first preset threshold is-1 dB, the second preset threshold is 3dB, and the preset priority is 2 level (10 level is highest priority). The current first SINR of the terminal device is-2 dB, which is smaller than the first preset threshold, the terminal device may detect SINRs of the preconfigured BWP1, BWP2, BWP3, BWP4, where SINRs of BWP1, BWP3, BWP4 are greater than 3dB, the terminal device may detect priorities of BWP1, BWP3, BWP4, where priorities of BWP3, BWP4 are greater than 2 level, the terminal device may determine BWP4 with priority level 4 as the second BWP, and request a handover to the second BWP with priority level 4 from the network device.

In this optional implementation manner, the terminal device may determine, among sixth BWPs with the first SINR greater than the first preset threshold, sixth BWPs with the SINR greater than the second preset threshold, select, as the second BWP, the BWP with the highest priority from the sixth BWPs, and request the network device to switch to the second BWP, and the terminal device may switch to the BWP with the SINR greater than the second preset threshold and the highest priority, so that the best applicable BWP may be selected, and the data transmission quality of the terminal device is improved.

A sixth alternative implementation: if the first SINR is smaller than a first preset threshold and the terminal device is pre-configured with D seventh BWPs, detecting historical SINRs of the D seventh BWPs; determining E seventh BWPs of which the SINR is greater than a second preset threshold from the D seventh BWPs according to the historical SINR of the D seventh BWPs; if F seventh BWPs with bandwidth larger than the preset bandwidth exist in the E seventh BWPs, the terminal device determines a second BWP in the F seventh BWPs, and sends a BWP handover request message to the network device.

The second BWP is the BWP with the largest bandwidth in the F seventh BWPs, D, E and F are integers which are more than or equal to 2, D is more than or equal to E, and E is more than or equal to F.

It should be noted that, if the current first SINR of the terminal device is less than the first preset threshold, the terminal device may detect SINRs of a plurality of preconfigured seventh BWPs, and according to the SINR of the seventh BWP, may determine that the SINRs are greater than the seventh BWP of the second preset threshold; the terminal device may select a seventh BWP having a bandwidth greater than the preset bandwidth again from the seventh BWPs having SINRs greater than the second preset threshold, and determine the BWP having the bandwidth greater than the preset bandwidth in the seventh BWP as the second BWP, and the terminal device may send a BWP handover request message for switching to the second BWP to the network device.

Illustratively, it is assumed that the network device configures BWP1, BWP2, BWP3, BWP4 to the terminal device in advance, where the SINR of BWP1 is 5dB, the bandwidth is 48M, the SINR of BWP2 is-2 dB, the bandwidth is 20M, the SINR of BWP3 is 4dB, the bandwidth is 60M, the SINR of BWP4 is 6dB, the bandwidth is 75M, the first preset threshold is-1 dB, the second preset threshold is 3dB, and the preset bandwidth is 50M. The current first SINR of the terminal device is-2 dB, which is smaller than the first preset threshold, the terminal device may detect SINRs of BWP1, BWP2, BWP3, and BWP4, where BWP1, BWP3, and BWP4 are greater than 3dB, the terminal device may detect bandwidths of BWP1, BWP3, and BWP4, where the bandwidths of BWP3 and BWP4 are greater than 50M, the terminal device may determine BWP4 with a bandwidth of 75M as the second BWP, and request the network device to switch to the second BWP with a bandwidth of 75M.

In this optional implementation manner, the terminal device may select, from among a plurality of seventh BWPs with the first SINR greater than the first preset threshold, the BWP with the largest bandwidth as the second BWP, and request the network device to switch to the second BWP, and the terminal device may switch to the BWP with the largest bandwidth, so that the most applicable BWP may be selected, and the data transmission quality of the terminal device is improved. 405. The terminal device receives the BWP switching indication message sent by the network device.

Wherein, the BWP handover indication message may be an RRC reconfiguration message or a DCI.

406. The terminal device switches from the first BWP to the second BWP.

The embodiment of the invention provides a method for switching BWP, when a terminal device works in BWP of a first partial bandwidth, the terminal device can detect a first signal-to-noise ratio SINR; if the first SINR is less than the first preset threshold, the terminal device may send a BWP handover request message to the network device; the BWP handover request message is used to request the network device to handover to a second BWP, where the second BWP is a BWP whose historical SINR is greater than a second preset threshold, and the second preset threshold is greater than or equal to the first preset threshold. By the scheme, the terminal device may detect whether the first SINR is less than a first preset threshold, and when the first SINR is less than the first preset threshold, that is, a signal of the terminal device is interfered and the SINR is reduced, at this time, the terminal device may send a BWP handover request message for requesting handover to a second BWP to the network device, so that the terminal device may handover to a second BWP with a larger SINR. Therefore, when the signal is interfered and the SINR is reduced, the terminal device may actively request BWP handover, and thus may switch to BWP with higher SINR, so that the terminal device may operate in an environment with faster data transmission.

Further, after the terminal device switches from the first BWP to the second BWP, the steps 402-406 in the embodiment of the method may be further performed; that is, when the terminal device detects that the second BWP is smaller than the first preset threshold, it continues to send a BWP handover request message for handover to a higher SINR to the network device.

As shown in fig. 5, an embodiment of the present invention provides a terminal device, where the terminal device includes:

a processing module 501, configured to detect a first signal-to-noise ratio SINR of a terminal device when the terminal device operates in a first partial bandwidth BWP;

a sending module 502, configured to send a BWP handover request message to a network device if the first SINR is less than a first preset threshold;

Optionally, the processing module 501 is specifically configured to detect historical SINRs of N third BWPs if the first SINR is less than a first preset threshold and the terminal device configures N third BWPs in advance, where N is an integer greater than or equal to 2;

the sending module 502 is specifically configured to determine a second BWP among the N third BWPs, and send a BWP handover request message to the network device.

Optionally, the sending module 502 is specifically configured to send a BWP handover request message to the network device if the first SINR is less than a first preset threshold and the first duration is greater than a preset duration;

Optionally, the processing module 501 is specifically configured to determine priorities of M fourth BWPs if the first SINR is smaller than a first preset threshold and the terminal device is preconfigured with M fourth BWPs;

the processing module 501 is specifically configured to determine, according to the priorities of the M fourth BWPs, K fourth BWPs with priorities greater than a preset priority from the M fourth BWPs;

a sending module 502, configured to determine, if T fourth BWPs exist in the K fourth BWPs, that the historical SINR is greater than the second preset threshold, a second BWP in the T fourth BWPs, and send a BWP handover request message to the network device;

wherein, the second BWP is the BWP with the largest historical SINR among the T fourth BWPs.

Optionally, the processing module 501 is specifically configured to detect historical SINRs of P fifth BWPs if the first SINR is smaller than a first preset threshold and the terminal device is preconfigured with P fifth BWPs;

a sending module 502, configured to determine, if the historical SINR of Q fifth BWPs in the historical SINRs of the P fifth BWPs is greater than a second preset threshold, a second BWP in the Q fifth BWPs, and send a BWP handover request message to the network device;

wherein, the second BWP is the BWP with the largest historical SINR among the Q fifth BWPs.

Optionally, the terminal device further includes:

a receiving module 503, configured to receive a BWP handover indication message of the network device, where the BWP handover indication message is used to indicate that the terminal device is allowed to handover to the second BWP;

the processing module 501 is further configured to switch from the first BWP to the second BWP.

Optionally, the sending module 502 is specifically configured to load the identifier of the second BWP in a MAC CE and/or uplink control information UCI, and send the identifier to the network device.

As shown in fig. 6, an embodiment of the present invention further provides a terminal device, where the terminal device may include a processor 601, a memory 602, and a computer program stored on the memory 602 and capable of running on the processor 601, and when the computer program is executed by the processor, each process executed by the terminal device in the foregoing method embodiments may be implemented, and the same technical effect may be achieved, and details are not repeated here to avoid repetition.

Fig. 7 is a schematic diagram of a hardware structure of a terminal device according to an embodiment of the present invention. The terminal device may include: radio Frequency (RF) circuitry 710, memory 720, input unit 730, display unit 740, sensor 750, audio circuitry 760, wireless fidelity (WiFi) module 770, processor 780, and power supply 790. Therein, the radio frequency circuit 710 includes a receiver 711 and a transmitter 712. Those skilled in the art will appreciate that the handset configuration shown in fig. 7 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The RF circuit 710 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, receives downlink information of a base station and then processes the received downlink information to the processor 780; in addition, the data for designing uplink is transmitted to the base station. In general, the RF circuit 710 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuit 710 may also communicate with networks and other devices via wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to global system for mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Message Service (SMS), etc.

The memory 720 may be used to store software programs and modules, and the processor 780 may execute various functional applications and data processing of the cellular phone by operating the software programs and modules stored in the memory 720. The memory 720 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 720 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The input unit 730 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the cellular phone. Specifically, the input unit 730 may include a touch panel 731 and other input devices 732. The touch panel 731, also referred to as a touch screen, can collect touch operations of a user (e.g. operations of the user on or near the touch panel 731 by using any suitable object or accessory such as a finger, a stylus, etc.) and drive the corresponding connection device according to a preset program. Alternatively, the touch panel 731 may include two portions of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts it to touch point coordinates, and sends the touch point coordinates to the processor 780, and can receive and execute commands from the processor 780. In addition, the touch panel 731 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The input unit 730 may include other input devices 732 in addition to the touch panel 731. In particular, other input devices 732 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

The display unit 740 may be used to display information input by the user or information provided to the user and various menus of the mobile phone. The display unit 740 may include a display panel 741, and optionally, the display panel 741 may be configured in the form of a Liquid Crystal Display (LCD), an organic light-Emitting diode (OLED), or the like. Further, the touch panel 731 can cover the display panel 741, and when the touch panel 731 detects a touch operation on or near the touch panel 731, the touch operation is transmitted to the processor 780 to determine the type of the touch event, and then the processor 780 provides a corresponding visual output on the display panel 741 according to the type of the touch event. Although the touch panel 731 and the display panel 741 are two independent components in fig. 7 to implement the input and output functions of the mobile phone, in some embodiments, the touch panel 731 and the display panel 741 may be integrated to implement the input and output functions of the mobile phone.

The terminal device may also include at least one sensor 750, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display panel 741 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 741 and/or a backlight when the mobile phone is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.

Audio circuitry 760, speaker 761, and microphone 762 may provide an audio interface between a user and a cell phone. The audio circuit 760 can transmit the electrical signal converted from the received audio data to the speaker 761, and the electrical signal is converted into a sound signal by the speaker 761 and output; on the other hand, the microphone 762 converts the collected sound signal into an electric signal, converts the electric signal into audio data after being received by the audio circuit 760, and then processes the audio data output processor 780, and then transmits the audio data to, for example, another cellular phone through the RF circuit 710, or outputs the audio data to the memory 720 for further processing.

WiFi belongs to short-distance wireless transmission technology, and the mobile phone can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 770, and provides wireless broadband Internet access for the user. Although fig. 7 shows the WiFi module 770, it is understood that it does not belong to the essential constitution of the handset, and can be omitted entirely as needed within the scope not changing the essence of the invention.

The processor 780 is a control center of the mobile phone, connects various parts of the entire mobile phone by using various interfaces and lines, and performs various functions of the mobile phone and processes data by operating or executing software programs and/or modules stored in the memory 720 and calling data stored in the memory 720, thereby integrally monitoring the mobile phone. Optionally, processor 780 may include one or more processing units; preferably, the processor 780 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 780.

The handset also includes a power supply 790 (e.g., a battery) for powering the various components, which may preferably be logically coupled to the processor 780 via a power management system, so that the power management system may be used to manage charging, discharging, and power consumption. Although not shown, the mobile phone may further include a camera, a bluetooth module, etc., which are not described herein.

In this embodiment of the present invention, the processor 780 is configured to detect a first signal-to-noise ratio SINR of the terminal device when the terminal device operates in the first partial bandwidth BWP;

an RF circuit 710, configured to send a BWP handover request message to a network device if the first SINR is less than a first preset threshold;

Optionally, the processor 880 is specifically configured to detect historical SINRs of N third BWPs if the first SINR is less than the first preset threshold and the terminal device configures N third BWPs in advance, where N is an integer greater than or equal to 2;

the RF circuit 710 is specifically configured to determine a second BWP among the N third BWPs, and send a BWP handover request message to the network device.

Optionally, the RF circuit 710 is specifically configured to send a BWP handover request message to the network device if the first SINR is less than a first preset threshold and the first duration is greater than a preset duration;

Optionally, the processor 780 is specifically configured to determine priorities of M fourth BWPs if the first SINR is smaller than a first preset threshold and the terminal device is preconfigured with M fourth BWPs;

the processor 780 is specifically configured to determine, according to the priorities of the M fourth BWPs, K fourth BWPs with priorities greater than a preset priority from the M fourth BWPs;

the RF circuit 710 is specifically configured to determine, if T fourth BWPs exist in the K fourth BWPs, that is, the historical SINR is greater than the second preset threshold, a second BWP in the T fourth BWPs, and send a BWP handover request message to the network device;

Optionally, the processor 780 is specifically configured to detect historical SINRs of P fifth BWPs if the first SINR is smaller than a first preset threshold and the terminal device is preconfigured with P fifth BWPs;

the RF circuit 710 is specifically configured to determine, if the historical SINR of the Q fifth BWPs is greater than a second preset threshold in the historical SINRs of the P fifth BWPs, a second BWP in the Q fifth BWPs, and send a BWP handover request message to the network device;

Optionally, the RF circuit 710 is further configured to receive a BWP handover indication message of the network device, where the BWP handover indication message is used to indicate that the terminal device is allowed to handover to the second BWP;

switching from the first BWP to the second BWP.

Optionally, the RF circuit 710 is further configured to load the identifier of the second BWP in a MAC CE and/or uplink control information UCI, and send the identifier to the network device.

An embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process executed by a terminal device in the foregoing method embodiments, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

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

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for switching BWP, applied to a terminal device, the method comprising:

detecting a first signal-to-noise ratio (SINR) of the terminal equipment when the terminal equipment works in a first partial Bandwidth (BWP);

2. The method of claim 1, wherein the sending a BWP handover request message to a network device if the first SINR is less than a first preset threshold comprises:

if the first SINR is smaller than a first preset threshold and the terminal device is preconfigured with N third BWPs, detecting historical SINRs of the N third BWPs;

determining the second BWP among the N third BWPs, and transmitting the BWP handoff request message to the network device.

3. The method of claim 1, wherein the sending a BWP handover request message to a network device if the first SINR is less than a first preset threshold comprises:

if the first SINR is smaller than the first preset threshold and the first duration is greater than a preset duration, sending the BWP handover request message to the network device;

the first duration is a duration that the first SINR is smaller than the first preset threshold.

4. The method of claim 1, wherein the sending a BWP handover request message to a network device if the first SINR is less than a first preset threshold comprises:

if the first SINR is smaller than the first preset threshold and the terminal device is preconfigured with M fourth BWPs, determining priorities of the M fourth BWPs;

determining K fourth BWPs with the priority greater than the preset priority from the M fourth BWPs according to the priorities of the M fourth BWPs;

if T fourth BWPs exist in the K fourth BWPs, wherein the historical SINR is greater than a second preset threshold, determining the second BWP in the T fourth BWPs, and sending the BWP switching request message to the network device;

wherein the second BWP is the BWP with the largest historical SINR among the T fourth BWPs.

5. The method of claim 1, wherein the sending a BWP handover request message to a network device if the first SINR is less than a first preset threshold comprises:

if the first SINR is smaller than the first preset threshold and the terminal device is preconfigured with P fifth BWPs, detecting historical SINR of the P fifth BWPs;

if the historical SINR of Q fifth BWPs is greater than a second preset threshold in the historical SINRs of the P fifth BWPs, determining the second BWP in the Q fifth BWPs, and sending the BWP handover request message to the network device;

wherein the second BWP is the BWP with the largest historical SINR among the Q fifth BWPs.

6. The method of claim 1, wherein after sending the BWP handover request message to the network device, further comprising:

receiving a BWP handover indication message of the network device, the BWP handover indication message indicating that the terminal device is allowed to handover to the second BWP;

switching from the first BWP to the second BWP.

7. The method according to any of claims 1 to 6, wherein said sending a BWP handover request message to a network device comprises:

and carrying the identifier of the second BWP in a media access control unit (MAC CE) and/or Uplink Control Information (UCI) and sending the identifier to the network equipment.

8. A terminal device, comprising:

9. A terminal device, comprising: processor, memory and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, implements a method of switching BWP according to any one of claims 1 to 7.

10. A computer-readable storage medium, comprising: the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the method of switching BWP according to any one of claims 1 to 7.