CN112770406B

CN112770406B - Listen-before-talk (LBT) failure recovery method, user equipment and base station

Info

Publication number: CN112770406B
Application number: CN201911078025.2A
Authority: CN
Inventors: 刘进华
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2022-11-04
Anticipated expiration: 2039-11-06
Also published as: CN112770406A

Abstract

The embodiment of the invention discloses a method for recovering Listen Before Talk (LBT) failure, user equipment and a base station, wherein the method comprises the following steps: when User Equipment (UE) is switched to a first uplink bandwidth part (BWP) from a second uplink bandwidth part (BWP), the UE sends first information to a base station on a configured uplink channel, wherein the first information is used for informing the base station that the UE is switched to the first uplink BWP from the second uplink BWP, and the uplink channel comprises at least one of a Sounding Reference Signal (SRS), a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH); and the UE receives second information sent by the base station, wherein the second information is used for informing the UE that the switching of the uplink BWP is successful. When uplink BWP switching occurs in UE, the embodiment of the invention sends the first information to the base station through the configured uplink channel to inform the base station that the UE switches the uplink BWP, thereby reducing resource consumption and transmission delay of service data.

Description

Listen Before Talk (LBT) failure recovery method, user equipment and base station

Technical Field

The embodiment of the invention relates to the field of communication, in particular to a method for recovering Listen Before Talk (LBT) failure, user equipment and a base station.

Background

In the case where NR operates in an unlicensed frequency, if a User Equipment (UE) uses a certain channel (e.g., 20 MHz) to send a message, the UE needs to detect the channel according to a Listen Before Talk (LBT) detection mechanism to determine whether the channel is available. When performing LBT, if a channel is occupied by other devices, it is determined that the LBT failed, i.e., the UE may not use the channel for transmission. If the number of LBT failures reaches a preset threshold within a preset period, it is determined that the currently used uplink band width part (UL BWP) is unavailable, where the uplink part bandwidth is also referred to as an uplink part band.

At this time, the UE may switch to UL BWP configured with Physical Random Access Channel (PRACH) resources to transmit data, and initiate a procedure of establishing a radio link with the RACH to notify the base station that the UE switches from the original UL BWP to the current UL BWP.

However, the process of establishing the radio link through the RACH notifies the base station that the resource overhead of switching the UE from the original UL BWP to the current UL BWP is too large, and the delay caused to the service data transmission is also large.

Disclosure of Invention

The embodiment of the invention provides a method for notifying uplink BWP switching, user equipment and a base station, which solve the problems of large resource overhead and large service data transmission delay in the process of notifying the base station of the condition that UE is switched from the original UL BWP to the current UL BWP and the problem of recovery from LBT failure.

In order to solve the technical problem, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a method for recovering an LBT failure, where the method includes:

when User Equipment (UE) is switched from a second uplink bandwidth part (BWP) to a first uplink BWP, the UE sends first information to a base station on a configured uplink channel, wherein the first information is used for informing the base station that the UE is switched from the second uplink BWP to the first uplink BWP, and the uplink channel comprises at least one of a Sounding Reference Signal (SRS), a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH);

and the UE receives second information sent by the base station, wherein the second information is used for informing the UE that the switching of the uplink BWP is successful.

In a second aspect, an embodiment of the present invention provides a method for recovering an LBT failure, where the method includes:

when User Equipment (UE) is switched from a second uplink BWP to a first uplink BWP, a base station receives first information sent by the UE on an uplink channel in the first uplink BWP, wherein the uplink channel comprises at least one of a Sounding Reference Signal (SRS), a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH);

and the base station sends second information to the UE, wherein the second information is used for determining that the UE successfully switches the BWP.

In a third aspect, an embodiment of the present invention provides a user equipment, where the user equipment includes:

a sending unit, configured to send, to a base station, first information on a configured uplink channel when a user equipment UE switches from a second uplink bandwidth part BWP to a first uplink BWP, where the first information is used to notify the base station UE to switch from the second uplink BWP to the first uplink BWP, and the uplink channel includes at least one of a sounding reference signal SRS, a physical uplink control channel PUCCH, and a physical uplink shared channel PUSCH;

a receiving unit, configured to receive second information sent by the base station, where the second information is used to notify the UE that the uplink BWP switching is successful.

In a fourth aspect, an embodiment of the present invention provides a base station, where the base station includes:

a receiving unit, configured to receive first information sent by a user equipment UE on an uplink channel in a first uplink BWP when the UE is switched from a second uplink BWP to the first uplink BWP, where the uplink channel includes at least one of a sounding reference signal SRS, a physical uplink control channel PUCCH, and a physical uplink shared channel PUSCH;

and a sending unit, configured to send second information to the UE, where the second information is used to determine that the UE successfully switches BWP.

In a fifth aspect, an embodiment of the present invention provides a user equipment, where the user equipment includes a transceiver, a processor, a memory, and instructions stored in the memory, and when the processor reads and executes the instructions in the memory, the first aspect is implemented.

In a sixth aspect, an embodiment of the present invention provides a base station, which includes a transceiver, a processor, a memory, and instructions stored in the memory, where the processor reads and executes the instructions in the memory to implement the method of the second aspect.

In the embodiment of the invention, when uplink BWP switching occurs in UE, first information is sent to a base station through a configured uplink channel to inform the base station that the UE switches the uplink BWP, so that resource consumption and transmission delay of service data are reduced, and the UE recovers from LBT failure.

Drawings

The present invention will be better understood from the following description of specific embodiments thereof taken in conjunction with the accompanying drawings, in which like or similar reference characters designate like or similar features.

Fig. 1 is a schematic flowchart of a recovery method for LBT failure according to an embodiment of the present invention;

fig. 2 is a schematic flowchart of a recovery method for LBT failure according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a recovery method for LBT failure according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention;

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

fig. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention.

Detailed Description

As mentioned above, when NR operates in an unlicensed frequency, before a certain channel is used to transmit data, a transmitter of a UE or a base station (gNB) should detect the channel according to the detection mechanism of LBT to determine whether the channel is usable. The specific detection method comprises the following steps: the transmitter measures the received power on the channel and determines that the channel is occupied if the received power is above a predetermined value. Otherwise, the channel is determined to be unoccupied, and the unoccupied channel can be used for NR signaling. Wherein, the preset value is a threshold value used for representing whether the channel is in an occupied state.

When the UE performs LBT, if the channel is occupied by other devices, LBT failure may result. According to the conclusion of 3GPP RAN2: if the number of LBT failures occurring in a preset time limit reaches a preset maximum number, the UE determines that the current UL BWP is unavailable, and at this time, the UE may autonomously switch to another UL BWP configured with Physical Random Access Channel (PRACH) resources, and initiate an RACH procedure to notify the base station that the UE has switched from the original UL BWP to the current UL BWP. The RACH procedure informs the base station UE that the UL BWP is switched, and PRACH resources need to be configured on the current UL BWP (or referred to as the target UL BWP), and accordingly, the base station needs to detect the PRACH on the potential target UL BWP all the time, which is very costly. Although the RACH procedure can be used to measure the UL timing of the UE and establish the radio link, at this time, the UE only performs UL BWP handover, the UL synchronization and the radio link of the UE still remain, and it is not necessary to use the RACH procedure to acquire uplink synchronization or establish the radio link.

Starting the RACH procedure only to notify the base station UE that the UL BWP is switched has the following disadvantages: 1. the resource overhead is too large, and the load of the PRACH detected by the base station is large, and the power consumption of the base station is also increased. 2. And the service data transmission delay is large. Only after the UE completes the entire RACH procedure, the base station can schedule the service data of the UE.

Therefore, the embodiment of the invention provides a recovery method of LBT failure, user equipment and a base station. When the current UL BWP is determined to be unavailable due to LBT failure, the UE switches to the target UL BWP, and besides using the RACH procedure to notify the base station of the UL BWP switch, the network device (e.g. the base station gNB) may further configure the UE to notify the UL BWP switch using other Uplink channels, where the Uplink channels may include Sounding Reference Signal (SRS), physical Uplink Control Channel (PUCCH) and Physical Uplink Shared Channel (PUSCH), and after detecting the Uplink Channel transmission information, the base station sends a response Signal to the UE to confirm that the UL BWP of the UE has been successfully switched. Compared with the method that the overhead is small through RACH resources, the service data transmission time delay is small, and the complexity is low.

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, but 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 "first", "second", and "third" mentioned in the embodiments of the present invention are only for distinguishing information, and do not limit the information itself.

Fig. 1 is a flowchart illustrating a method for recovering from LBT failure according to an embodiment of the present invention. As shown in fig. 1, the method may include the steps of:

s110, when the UE switches from the second uplink BWP to the first uplink BWP, the UE sends the first information to the base station on the configured uplink channel.

The first information is used to inform the base station UE to switch from the second uplink BWP to the first uplink BWP.

In the embodiment of the present invention, before performing S110, the UE has received information of the uplink BWP configured by the base station for the UE and an uplink resource for notifying the base station that the UE switches to the configured uplink BWP, where the uplink resource includes information of an uplink channel. The uplink channel may include at least one of SRS, PUCCH, PUSCH.

The uplink resource further includes information of first information carried on an uplink channel, for notifying the base station that the UE switches to the configured uplink BWP when the UE switches to the configured uplink BWP.

For example, if the uplink Channel configured by the base station is a PUCCH, the first Information for notifying the base station UE that the uplink BWP is switched may be configured as an uplink Scheduling Request (SR) or response Information (feedback) of a Hybrid automatic repeat Request (HARQ), or Channel State Information (CSI).

In one example, when one UL BWP (referred to as a first UL BWP, e.g., UL BWP x 1) from the base station to the UE is configured with uplink resources and the other UL BWP (referred to as a second UL BWP, e.g., UL BWP x 2) being used by the UE is determined to be unavailable, the base station may be switched from UL BWP x2 to UL BWP x1 and may be notified of the first information of the UL BWP handover using an uplink channel configured for UL BWP x 1.

In one example, the UE may inform the base station that the UE switches from the second UL BWP to the first UL BWP through SR carried on the uplink channel PUCCH, or HARQ response information, or CSI. When the UE notifies the base station of the switching of the UL BWP by using the SR, the detection complexity of the base station is low, and the requirement on PUCCH capacity is also minimum.

In one example, the base station may configure the resource of the uplink channel PUSCH through information of type1/2 configuration grant (type 1/2 configured grant). When the UE switches to the new uplink BWP, the UE may notify the base station that the UE switches to the uplink BWP through the first information carried on the uplink channel PUSCH, in which case, after the UE switches to the new uplink BWP, the UE may directly transmit data on the new uplink BWP.

Optionally, in an embodiment of the present invention, the uplink resource configured by the base station for the UE may further include an increased preset transmission power offset for the UE to send the first information on the uplink channel. When uplink BWP handover occurs to the UE, the UE sends the first information to the base station on the configured uplink channel by using the transmission power with the increased offset of the preset transmission power, so as to increase the probability that the base station detects the uplink channel, in other words, facilitate the base station to receive the first information carried on the uplink channel.

Optionally, in an example, when the uplink channel is PUCCH, or PUSCH, or PUCCH and PUSCH, the first information may include UE identity information, so that the base station may distinguish which UE transmits the first information. The Identity information of the UE may include a Cell-Radio Network Temporary Identity (C-RNTI), a Configured Scheduling (CS) Temporary Identity CS-RNTI, an Inactive state (Inactive state) Temporary Identity I-RNTI, or the like.

S120, the base station sends a second message to the UE, and the second message is used for notifying the UE that the switching of the uplink BWP is successful.

When the base station receives the first information sent by the UE, the base station sends second information to the UE to inform the UE that the switching of the uplink BWP is successful.

The second information may be uplink grant (grant) information, where the uplink grant information is used for the UE to transmit the PUSCH on the first uplink BWP; or,

the second information is a first configuration message transmitted by the base station on the PDCCH, and the first configuration message includes an activation information (grant) for transmitting SRS and PUCCH on the first uplink BWP configured for the UE (where the PUCCH may carry response information of SR and HARQ), or activating (activating) Configuration Scheduling (CS), or terminating (activating) the CS; or,

when the UE sends first information on a PUSCH to inform a base station that the UE is switched from a second uplink BWP to a first uplink BWP, the second information is a HARQ response message corresponding to the PUSCH; or,

the second information is a PDCCH order (order) or a Media Access Control (MAC) Element (CE).

In other words, the UE receiving the second information transmitted by the base station may include the following cases:

and the UE receives uplink authorization information (UL grant) sent by the base station, and the uplink authorization information is scheduled to be transmitted on a PUSCH of a new UL BWP. Or,

the UE receives first configuration information carried and transmitted on a PDCCH by a base station, wherein the first configuration information comprises SRS, PUCCH (SR/HARQ feedback /) or activation information for activating the CS or activation information for terminating the CS which are configured for the UE and transmitted on a new UL BWP. Or,

the UE sends the first information on the PUSCH to notify the base station, and after the uplink BWP handover of the UE, the UE receives an HARQ response message (e.g. DFI) carried and transmitted by the base station on the PUSCH. Or,

the UE receives a PDCCH order (order) or a MAC CE sent by the base station to notify the UE that the uplink BWP handover is completed.

And the UE receives the second information sent by the base station, determines that the uplink BWP is successfully switched, and may transmit data on the uplink BWP, that is, the UE recovers from the LBT failure.

According to the LBT failure recovery method provided by the embodiment of the invention, the uplink BWP switching is notified to the base station UE through the uplink channel configured by the base station, so that the resource consumption and the transmission delay of the service data are reduced.

In another embodiment provided by the present invention, when the base station configures a plurality of UEs to share an uplink channel (such as SRS, PUCCH, PUSCH), and the plurality of UEs transmit the first information to the base station through the shared channel to notify the base station of uplink BWP handover, the base station cannot distinguish which UE transmits the first information, and at this time, cannot transmit the second information to the UE transmitting the first information.

In this case, the base station may allocate one piece of identification information to the UE sharing the uplink channel. For example, the base station configures UE identification information of one shared PUCCH and PUSCH resource, such as a temporary identification number of the UE. For example, if 16 UEs share the PUCCH/PUSCH resource, the base station may allocate a sequence number of 4 bits to each UE, where the sequence number is carried by the PUCCH and the PUSCH. When the base station detects this PUCCH/PUSCH, it knows which UE is notifying UL BWP handover.

Or, when the base station receives the first information transmitted by the UE on the uplink channel, the base station sends a grant message to the UE receiving the first information, so that the UE sends the UE identification information to the base station by using the grant message after receiving the grant message.

That is, in an embodiment of the present invention, as shown in fig. 2, before the UE receives the second information sent by the base station, the method may further include:

s130, the base station sends third information to the UE.

In the case that the base station cannot distinguish which UE transmits the uplink BWP handover, when the base station receives the uplink BWP handover information transmitted by the UE, the base station transmits third information to the UE transmitting the uplink BWP handover information to inform the UE of transmitting the identification information to the base station.

And S140, the UE sends the identity identification information of the UE to the base station on the uplink channel according to the third information, wherein the identity identification information is used for the base station to verify the identity of the UE.

And the UE receives the third information sent by the base station, and sends the identification information of the UE on the uplink channel for sending the information of uplink BWP switching, so that the base station can distinguish the information of uplink BWP switching sent by which UE.

For example, the UE transmits uplink BWP handover information on SRS and PUCCH (where SR may be carried on PUCCH), and when the base station detects SRS and PUCCH, the base station transmits a third information, such as grant information, to the UE transmitting uplink BWP handover information on SRS and PUCCH. And the UE sends the identification information to the base station by using the grant information. In one example, the grant information may be transmitted using a group RNTI, and only UEs that have transmitted information of uplink BWP handover on SRS and PUCCH may receive the grant information. In this way, when a large number of UEs are involved, the base station can detect SRS and PUCCH data at a lower rate, thereby reducing resource consumption.

In one example, the identity information of the UE may include C-RNTI, or CS-RNTI, or I-RNTI.

In the embodiment of the present invention, the notification manner that the UE needs to send the UE identity identification to notify the base station UE of the uplink BWP handover, which is S130 and S140, may be referred to as explicitly notifying the uplink BWP handover. The notification method that does not need to send the UE identification identifier to notify the base station UE of the uplink BWP handover, which is S110 and S120 in fig. 1, is referred to as implicit notification of uplink BWP handover.

In another embodiment of the present invention, after the UE sends the first information to the base station on the uplink channel for the preset number of times, the UE does not receive the second information sent by the base station, and when the UE determines that the PRACH resource is configured on the first uplink BWP, the UE notifies the base station through the RACH, and the UE switches from the second uplink BWP to the first uplink BWP.

In another embodiment of the present invention, after the UE transmits the first information to the base station on the uplink channel a preset number of times, the UE does not receive the second information transmitted by the base station, and the UE switches from the first uplink BWP to the third uplink BWP. And then the UE sends uplink BWP switching information on an uplink channel of a third uplink BWP configured for the UE by the base station to inform the base station that the UE is switched from the first uplink BWP to the third uplink BWP. The process of the UE informing the base station that the UE switches from the first uplink BWP to the third uplink BWP is the same as the process of the UE switching from the second uplink BWP to the first uplink BWP, and is not described herein again for brevity.

For example, after the UE autonomously switches from UL BWP x2 to UL BWP x1, if the UE transmits SRS, PUCCH, or PUSCH several times (for example, N times) on UL BWP x1, the UE does not receive the response information from the base station. The UE may then process as follows:

1: the UE directly determines that UL BWP x1 is not available, and at this time, if there are other potential target UL BWPs, the UE may switch to the other potential target UL BWPs and then notify the base station of the UL BWP switch.

2: if there is also PRACH resource on UL BWP x1, the UE may initiate RACH procedure to inform UL BWP handover.

In an embodiment of the present invention, as shown in fig. 3, before the UE sends the first information to the base station on the configured uplink channel, the method further includes:

s150, the base station sends a second configuration message to the UE, where the second configuration message includes information of an uplink channel transmitted by the UE on the first uplink BWP, information of first information sent by the UE on the uplink channel, and/or an increased offset value of a preset transmission power when the UE sends the first information.

When the uplink channel is used for carrying the first information sent by the multiple UEs, the second configuration message further includes an identity identifier configured for the multiple UEs and used for uniquely determining the identities of the UEs.

By the recovery method for LBT failure provided in the embodiment of the present invention, when the UE switches the uplink BWP, the configured uplink channel is used to send the first information to the base station to notify the base station of the UE to switch the uplink BWP, and the base station sends the second information to the UE according to the received first information to notify the UE of the successful uplink BWP switching, and further determines that data can be transmitted on the newly switched uplink BWP, so that LBT detection can be performed on the uplink channel of the new uplink BWP.

Fig. 1 to fig. 3 describe a recovery method for LBT failure according to an embodiment of the present invention, and the following describes a user equipment and a base station according to an embodiment of the present invention with reference to fig. 4 and fig. 5.

Fig. 4 is a user equipment according to an embodiment of the present invention. As shown in fig. 4, the user equipment may include a transmitting unit 210 and a receiving unit 220.

A sending unit 210, configured to send, when a user equipment UE switches from a second uplink bandwidth part BWP to a first uplink BWP, first information on a configured uplink channel, where the first information is used to notify a base station that the UE switches from the second uplink BWP to the first uplink BWP, and the uplink channel includes at least one of a sounding reference signal SRS, a physical uplink control channel PUCCH, and a physical uplink shared channel PUSCH; a receiving unit 220, configured to receive second information sent by the base station, where the second information is used to notify the UE that switching of the uplink BWP is successful.

In one embodiment, when the uplink channel is PUCCH, the first information is uplink scheduling request SR, or response information of downlink hybrid automatic repeat request HARQ, or channel state information CSI.

Optionally, in an embodiment, the receiving unit 220 is further configured to receive third information sent by the base station; the sending unit 210 sends the UE identity information to the base station on the uplink channel according to the third information, where the identity information is used for the base station to verify the identity of the UE.

In one embodiment, the identity information of the UE comprises a cell radio network temporary identifier C-RNTI, or a configuration scheduling temporary identifier CS-RNTI or an inactive temporary identifier I-RNTI.

In one embodiment, when the uplink channel is PUCCH, PUSCH, or both PUCCH and PUSCH, the first information further comprises C-RNTI, or CS-RNTI, or I-RNTI, C-RNTI, CS-RNTI, and I-RNTI for identifying the identity of the UE.

In one embodiment, the second information is uplink grant information, and the uplink grant information is used for the UE to transmit PUSCH on the first uplink BWP; or,

the second information is a first configuration message transmitted by the base station on the PDCCH, and the first configuration message includes activation information configured for the UE to transmit SRS and PUCCH on the first uplink BWP, or activate configuration scheduling CS, or terminate CS. Or,

the second information is a PDCCH order or a medium access layer control element, MAC CE.

In one embodiment, as shown in fig. 4, the user equipment further comprises a switching unit 230. After the UE sends first information for a preset number of times to the base station on an uplink channel, the UE does not receive second information sent by the base station, and when the UE determines that PRACH resources are configured on the first uplink BWP, the UE informs the base station through a random access channel RACH, and the UE is switched from the second uplink BWP to the first uplink BWP; or,

after the UE transmits the first information to the base station for the preset number of times on the uplink channel, the UE does not receive the second information transmitted by the base station, and the switching unit 230 switches from the first uplink BWP to the third uplink BWP.

Optionally, in an embodiment, the specific sending unit 210 sends the first information to the base station on the configured uplink channel by using the transmission power increased by the preset transmission power offset.

In an embodiment, the receiving unit 220 is further configured to receive a second configuration message sent by the base station, where the second configuration message includes information of an uplink channel transmitted by the UE on the first uplink BWP, information of first information sent by the UE on the uplink channel, and/or an increase offset value of the preset transmit power when the UE sends the first information.

In one embodiment, when the uplink channel is used for carrying the first information sent by the multiple UEs, the second configuration message further includes an identification configured for the multiple UEs to uniquely determine the UE identity.

Each unit of the ue provided in fig. 4 has the function of implementing each method or step executed by the ue in fig. 1 to fig. 3, and achieves the corresponding technical effect, and for brevity, no further description is given here.

Fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown in fig. 5, the base station may include a receiving unit 310 and a transmitting unit 320.

A receiving unit 310, configured to receive first information sent by a user equipment UE on an uplink channel in a first uplink BWP when the user equipment UE switches from a second uplink BWP to the first uplink BWP, where the uplink channel includes at least one of a sounding reference signal SRS, a physical uplink control channel PUCCH, and a physical uplink shared channel PUSCH.

A sending unit 320, configured to send second information to the UE, where the second information is used to determine that the UE successfully switches BWP.

In one embodiment, the sending unit 320 is further configured to send third information to the UE, where the third information is used for the UE to send the UE identity information to the base station on an uplink channel.

In one embodiment, when the uplink channel is PUCCH, or PUSCH, or both PUCCH and PUSCH, the first information further comprises C-RNTI, or CS-RNTI, or I-RNTI, C-RNTI, CS-RNTI, and I-RNTI for identifying the identity of the UE.

the second information is a first configuration message transmitted on the PDCCH by the base station, and the first configuration message includes activation information for transmitting SRS and PUCCH on a first uplink BWP configured for the UE, or activating and configuring a scheduling CS, or terminating the CS; or,

the second information is a PDCCH order, or a medium access layer control element, MAC CE.

In one embodiment, the sending unit 320 is further configured to send a second configuration message to the UE, where the second configuration message includes information of an uplink channel transmitted by the UE on the first uplink BWP, information of first information sent by the UE on the uplink channel, and/or an increased offset value of the preset transmission power when the UE sends the first information.

Each unit of the base station provided in fig. 5 implements each method or step performed by the base station in fig. 1 to fig. 3, and achieves the corresponding technical effect, and for brevity, the description is omitted here.

Figure 5 is a schematic diagram of a hardware structure of a user equipment implementing various embodiments of the present invention,

the user equipment 400 includes but is not limited to: radio frequency unit 401, network module 402, audio output unit 403, input unit 404, sensor 405, display unit 406, user input unit 407, interface unit 408, memory 409, processor 410, and power supply 411. Those skilled in the art will appreciate that the user equipment configuration shown in fig. 5 does not constitute a limitation of the user equipment, which may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the user equipment includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The radio frequency unit 401 is configured to send, when a user equipment UE switches from a second uplink bandwidth portion BWP to a first uplink BWP, first information to a base station on a configured uplink channel, where the first information is used to notify the base station that the UE switches from the second uplink BWP to the first uplink BWP, and the uplink channel includes at least one of a sounding reference signal SRS, a physical uplink control channel PUCCH, and a physical uplink shared channel PUSCH; and receiving second information sent by the base station, wherein the second information is used for informing the UE that the uplink BWP switching is successful.

In the embodiment of the invention, when uplink BWP switching occurs in UE, first information is sent to a base station through a configured uplink channel to inform the base station that the UE switches the uplink BWP, thereby reducing resource consumption and transmission delay of service data.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 401 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 410; in addition, uplink data is transmitted to the base station. Typically, radio unit 401 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio unit 401 can also communicate with a network and other devices through a wireless communication system.

The user device provides wireless broadband internet access to the user via the network module 402, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

The audio output unit 403 may convert audio data received by the radio frequency unit 401 or the network module 402 or stored in the memory 409 into an audio signal and output as sound. Also, the audio output unit 403 may also provide audio output related to a specific function performed by the user equipment 400 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 403 includes a speaker, a buzzer, a receiver, and the like.

The input unit 404 is used to receive audio or video signals. The input Unit 404 may include a Graphics Processing Unit (GPU) 4041 and a microphone 4042, and the Graphics processor 4041 processes image data of a still picture or video obtained by an image capturing apparatus (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 406. The image frames processed by the graphic processor 4041 may be stored in the memory 409 (or other storage medium) or transmitted via the radio frequency unit 401 or the network module 402. The microphone 4042 may receive sound, and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 401 in case of the phone call mode.

User device 400 also includes at least one sensor 405, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 4061 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 4061 and/or the backlight when the user device 400 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), detect the magnitude and direction of gravity when stationary, and can be used to identify the user equipment posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 405 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described in detail herein.

The display unit 406 is used to display information input by the user or information provided to the user. The Display unit 406 may include a Display panel 4061, and the Display panel 4061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 407 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the user device. Specifically, the user input unit 407 includes a touch panel 4071 and other input devices 4072. Touch panel 4071, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., operations by a user on or near touch panel 4071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 4071 may include two parts, 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 the touch information into touch point coordinates, sends the touch point coordinates to the processor 410, receives a command from the processor 410, and executes the command. In addition, the touch panel 4071 can be implemented by using various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 4071, the user input unit 407 may also include other input devices 4072. Specifically, the other input devices 4072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 4071 can be overlaid on the display panel 4061, and when the touch panel 4071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 410 to determine the type of the touch event, and then the processor 410 provides a corresponding visual output on the display panel 4061 according to the type of the touch event. Although in fig. 5, the touch panel 4071 and the display panel 4061 are two separate components to implement the input and output functions of the user equipment, in some embodiments, the touch panel 4071 and the display panel 4061 may be integrated to implement the input and output functions of the user equipment, which is not limited herein.

The interface unit 408 is an interface for connecting an external device to the user equipment 400. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 408 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the user equipment 400 or may be used to transmit data between the user equipment 400 and the external device.

The memory 409 may be used to store software programs as well as various data. The memory 409 may mainly include a storage program area and a storage data area, wherein the storage program 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 409 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 processor 410 is a control center of the user equipment, connects various parts of the entire user equipment using various interfaces and lines, performs various functions of the user equipment and processes data by operating or executing software programs and/or modules stored in the memory 409 and calling data stored in the memory 409, thereby performing overall monitoring of the user equipment. Processor 410 may include one or more processing units; preferably, the processor 410 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 410.

The user equipment 400 may further comprise a power supply 411 (such as a battery) for supplying power to various components, and preferably, the power supply 411 may be logically connected to the processor 410 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.

In addition, the user equipment 400 includes some functional modules that are not shown, and are not described in detail herein.

An embodiment of the present invention further provides a user equipment, which includes a processor 410, a memory 409, and a computer program stored in the memory 409 and capable of running on the processor 410, where the computer program, when executed by the processor 410, implements each method or step executed by the user equipment in the method embodiments shown in fig. 1 to fig. 3, and can achieve the same technical effect, and no further description is provided here to avoid repetition.

Fig. 6 is a schematic diagram of a hardware structure of a base station according to an embodiment of the present invention.

As shown in fig. 6, a block diagram of an exemplary hardware architecture of a base station capable of implementing the recovery method for LBT failure in the embodiment of the present invention is shown.

The apparatus may include a processor 510 and a memory 502 storing computer program instructions.

Specifically, the processor 510 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

Memory 520 may include mass storage for data or instructions. By way of example, and not limitation, memory 520 may include a Hard Disk Drive (HDD), a floppy disk drive, flash memory, an optical disk, a magneto-optical disk, magnetic tape, or a Universal Serial Bus (USB) drive or a combination of two or more of these. Memory 520 may include removable or non-removable (or fixed) media, where appropriate. Memory 520 may be internal or external to the integrated gateway device, where appropriate. In a particular embodiment, the memory 520 is a non-volatile solid-state memory. In certain embodiments, memory 520 comprises Read Only Memory (ROM). Where appropriate, the ROM may be mask-programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically Erasable PROM (EEPROM), electrically Alterable ROM (EAROM), or flash memory, or a combination of two or more of these.

Processor 510 may implement any of the above described embodiments of LBT failure recovery methods by reading and executing computer program instructions stored in memory 520.

The transceiver 530 is mainly used for implementing communication with the user equipment in the embodiment of the present invention.

In one example, the device may also include a bus 540. As shown in fig. 6, the processor 510, the memory 520, and the transceiver 530 are coupled to and communicate with each other via a bus 540.

The bus 540 includes hardware, software, or both. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industrial Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industrial Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus or a combination of two or more of these. Bus 503 may include one or more buses, where appropriate. Although specific buses are described and shown in the embodiments of the application, any suitable buses or interconnects are contemplated by the application.

An embodiment of the present invention further provides a base station, including a processor 510, a memory 520, and a computer program stored in the memory 520 and capable of running on the processor 510, where the computer program, when executed by the processor 510, implements each method or step executed by the base station in the method embodiments shown in fig. 1 to fig. 3, and can achieve the same technical effect, and is not described herein again to avoid repetition.

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 phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element 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 or portions thereof contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the methods according to the embodiments of the present invention.

While the present invention has been described with reference to the particular illustrative embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and equivalents thereof, which may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method of recovering from a listen before talk LBT failure, the method comprising:

2. The method of claim 1, wherein when the uplink channel is PUCCH, the first information is uplink Scheduling Request (SR), or response information of downlink hybrid automatic repeat request (HARQ), or Channel State Information (CSI).

3. The method of claim 1, wherein before the UE receives the second information transmitted by the base station, the method further comprises:

the UE receives third information sent by the base station;

and the UE sends the identity identification information of the UE to the base station on the uplink channel according to the third information, wherein the identity identification information is used for the base station to verify the identity of the UE.

4. The method of claim 3, wherein the identity information of the UE comprises a cell radio network temporary identifier (C-RNTI), a configuration scheduling temporary identifier (CS-RNTI), or an inactive temporary identifier (I-RNTI).

5. The method of claim 1, wherein when the uplink channel is PUCCH, or PUSCH, or PUCCH and PUSCH, the first information further includes C-RNTI, or CS-RNTI, or I-RNTI, and the C-RNTI, CS-RNTI, and I-RNTI are used to identify the identity of the UE.

6. The method of claim 1, wherein the second information is an uplink grant information, and wherein the uplink grant information is used for the UE to transmit PUSCH on the first uplink BWP; or,

the second information is a first configuration message transmitted by the base station on a PDCCH, and the first configuration message includes activation information configured for the UE to transmit SRS and PUCCH on the first uplink BWP, or activate configuration scheduling CS, or terminate CS; or,

when the UE sends the first information on a PUSCH to inform the base station that the UE is switched from a second uplink BWP to a first uplink BWP, the second information is a HARQ response message corresponding to the PUSCH; or,

the second information is a PDCCH order or a media access control element, MAC CE.

7. The method of claim 1, wherein after the UE sends a preset number of first messages to the base station on the uplink channel, the UE does not receive a second message sent by the base station, and when the UE determines that the PRACH resource is configured on the first uplink BWP, the UE notifies the base station through a random access channel RACH, and the UE switches from the second uplink BWP to the first uplink BWP; or,

and after the UE sends first information for preset times to the base station on the uplink channel, the UE does not receive second information sent by the base station, and the UE is switched from the first uplink BWP to a third uplink BWP.

8. The method of claim 1, wherein the UE transmits the first information to the base station on the configured uplink channel using a transmission power increased by a preset transmission power offset.

9. The method of claim 1, wherein before the UE transmits the first information to the base station on the configured uplink channel, the method further comprises:

the UE receives a second configuration message sent by the base station, where the second configuration message includes information of the uplink channel transmitted by the UE on the first uplink BWP, information of the first information sent by the UE on the uplink channel, and/or an increase offset value of a preset transmission power when the UE sends the first information.

10. The method of claim 9, wherein when the uplink channel is used to carry first information sent by a plurality of UEs, the second configuration message further includes an id configured for the plurality of UEs to uniquely determine the UE identity.

11. A method of recovering from a listen before talk LBT failure, the method comprising:

12. The method of claim 11, wherein when the uplink channel is PUCCH, the first information is uplink scheduling request SR, or response information of downlink hybrid automatic repeat request HARQ, or channel state information CSI.

13. The method of claim 11, wherein before the base station sends the second information to the UE, the method further comprises:

and the base station sends third information to the UE, wherein the third information is used for sending the identity identification information of the UE to the base station on the uplink channel by the UE.

14. The method of claim 13, wherein the identity information of the UE comprises a cell radio network temporary identifier C-RNTI, or a configuration scheduling temporary identifier CS-RNTI, or an inactive temporary identifier I-RNTI.

15. The method of claim 11, wherein when the uplink channel is PUCCH, or PUSCH, or PUCCH and PUSCH, the first information further includes C-RNTI, or CS-RNTI, or I-RNTI, and wherein the C-RNTI, CS-RNTI, and I-RNTI are used to identify the UE.

16. The method of claim 11, wherein the second information is an uplink grant information, and wherein the uplink grant information is used for the UE to transmit PUSCH on the first uplink BWP; or,

the second information is a first configuration message transmitted by the base station on the PDCCH, and the first configuration message includes activation information configured for the UE to transmit SRS and PUCCH on the first uplink BWP, or activate configuration scheduling CS, or activate termination CS; or,

17. The method of claim 11, wherein before the base station receives the first information sent by the user equipment UE on the uplink channel within the first uplink BWP, the method further comprises:

the base station sends a second configuration message to the UE, where the second configuration message includes information of the uplink channel transmitted by the UE on the first uplink BWP, information of the first information sent by the UE on the uplink channel, and/or an increase offset value of a preset transmission power when the UE sends the first information.

18. The method of claim 17, wherein when the uplink channel is used to carry first information sent by a plurality of UEs, the second configuration message further includes an id configured for the plurality of UEs to uniquely determine the UE identity.

19. A user equipment, the user equipment comprising:

a sending unit, configured to send, when a user equipment UE switches from a second uplink bandwidth portion BWP to a first uplink BWP, first information to a base station on a configured uplink channel, where the first information is used to notify the base station that the UE switches from the second uplink BWP to the first uplink BWP, and the uplink channel includes at least one of a sounding reference signal SRS, a physical uplink control channel PUCCH, and a physical uplink shared channel PUSCH;

a receiving unit, configured to receive second information sent by the base station, where the second information is used to notify the UE that uplink BWP switching is successful.

20. A base station, characterized in that the base station comprises:

a receiving unit, configured to receive first information sent by a user equipment UE on an uplink channel in a first uplink BWP when the UE is handed over from a second uplink BWP to the first uplink BWP, where the uplink channel includes at least one of a sounding reference signal SRS, a physical uplink control channel PUCCH, and a physical uplink shared channel PUSCH;

a sending unit, configured to send second information to the UE, where the second information is used to determine that BWP switching by the UE is successful.

21. A user equipment comprising a transceiver, a processor, a memory, and instructions stored on the memory, the processor when reading and executing the instructions in the memory implementing the method of any one of claims 1 to 10.

22. A base station comprising a transceiver, a processor, a memory, and instructions stored on the memory, the processor when reading and executing the instructions in the memory implementing the method of any one of claims 11 to 18.