WO2022195316A1

WO2022195316A1 - Apparatus and method of wireless communication

Info

Publication number: WO2022195316A1
Application number: PCT/IB2021/000216
Authority: WO
Inventors: Hao Lin
Original assignee: Orope France Sarl
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2022-09-22
Also published as: CN115119217A

Abstract

An apparatus and a method of wireless communication are provided. The method by a user equipment (UE) includes being configured, by a base station, with a first BWP and a second BWP, wherein the first BWP is an active BWP, and the UE changes the active BWP from the first BWP to the second BWP based on at least a first information. This can solve issues in the prior art, provide a beam management for a non-terrestrial network (NTN) system, reduce a signaling overhead, provide a good communication performance, and/or provide high reliability.

Description

APPARATUS AND METHOD OF WIRELESS COMMUNICATION

BACKGROUND OF DISCLOSURE

1. Field of the Disclosure

[0001] The present disclosure relates to the field of communication systems, and more particularly, to an apparatus and a method of wireless communication, which can provide a good communication performance and/or high reliability.

2. Description of the Related Art

[0002] Non-terrestrial networks (NTNs) refer to networks, or segments of networks, using a spaceborne vehicle or an airborne vehicle for transmission. Spaceborne vehicles include satellites including low earth orbiting (LEO) satellites, medium earth orbiting (MEO) satellites, geostationary earth orbiting (GEO) satellites, and highly elliptical orbiting (HEO) satellites. Airborne vehicles include high altitude platforms (HAPs) encompassing unmanned aircraft systems (UAS) including lighter than air (LTA) unmanned aerial systems (UAS) and heavier than air (HTA) UAS, all operating in altitudes typically between 8 and 50 km, quasi-stationary.

[0003] Communication via a satellite is an interesting means thanks to its well-known coverage, which can bring the coverage to locations that normally cellular operators are not willing to deploy either due to non-stable crowd potential client, e.g., extremely rural, or due to high deployment cost, e.g., middle of ocean or mountain peak. Nowadays, the satellite communication is a separate technology to a 3rd generation partnership project (3GPP) cellular technology. Coming to 5G era, these two technologies can merge together, i.e., we can imagine having a 5G terminal that can access to a cellular network and a satellite network. The NTN can be good candidate technology for this purpose. It is to be designed based on 3GPP new radio (NR) with necessary enhancement.

[0004] Due to a long distance between a satellite and a user equipment (UE) on the round, communication may suffer from pass-loss leading to a reduced coverage. To overcome this issue, beam-forming may be envisioned. The satellite will transmit or receive a signal using transmitter beam-forming or receiver beam-forming. But on the other hand, due to extremely high satellite mobility, the beam projected to the earth will move following the time. Thus, a beam management become quite challenge in NTN system.

[0005] Therefore, there is a need for an apparatus (such as a user equipment (UE) and/or a base station) and a method of wireless communication, which can solve issues in the prior art, provide a beam management for a non-terrestrial network (NTN) system, reduce a signaling overhead, provide a good communication performance, and/or provide high reliability.

SUMMARY

[0006] An object of the present disclosure is to propose an apparatus (such as a user equipment (UE) and/or a base station) and a method of wireless communication, which can solve issues in the prior art, provide a beam management for a non terrestrial network (NTN) system, reduce a signaling overhead, provide a good communication performance, and/or provide high reliability.

[0007] In a first aspect of the present disclosure, a method of wireless communication by a user equipment (UE) comprises being configured, by a base station, with a first BWP and a second BWP, wherein the first BWP is an active BWP, and the UE changes the active BWP from the first BWP to the second BWP based on at least a first information.

[0008] In a second aspect of the present disclosure, a method of wireless communication by a base station comprises configuring, to a user equipment (UE), a first BWP and a second BWP, wherein the first BWP is an active BWP, and the UE changes the active BWP from the first BWP to the second BWP based on at least a first information.

[0009] In a third aspect of the present disclosure, a user equipment comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured, by a base station, with a first BWP and a second BWP, wherein the first BWP is an active BWP, and the processor changes the active BWP from the first BWP to the second BWP based on at least a first information.

[0010] In a fourth aspect of the present disclosure, a base station comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to configure, to a user equipment (UE), a first BWP and a second BWP, wherein the first BWP is an active BWP, and the UE changes the active BWP from the first BWP to the second BWP based on at least a first information.

[0011] In a fifth aspect of the present disclosure, a non-transitory machine-readable storage medium has stored thereon instructions that, when executed by a computer, cause the computer to perform the above method.

[0012] In a sixth aspect of the present disclosure, a chip includes a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the above method.

[0013] In a seventh aspect of the present disclosure, a computer readable storage medium, in which a computer program is stored, causes a computer to execute the above method.

[0014] In an eighth aspect of the present disclosure, a computer program product includes a computer program, and the computer program causes a computer to execute the above method.

[0015] In a ninth aspect of the present disclosure, a computer program causes a computer to execute the above method.

BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present disclosure or related art, the following figures will be described in the embodiments are briefly introduced. It is obvious that the drawings are merely some embodiments of the present disclosure, a person having ordinary skill in this field can obtain other figures according to these figures without paying the premise.

[0017] FIG. 1A is a block diagram of one or more user equipments (UEs) and a base station (e.g., gNB or eNB) of communication in a communication network system (e.g., non-terrestrial network (NTN) or a terrestrial network) according to an embodiment of the present disclosure.

[0018] FIG. IB is a block diagram of one or more user equipments (UEs) and a base station (e.g., gNB or eNB) of communication in a non-terrestrial network (NTN) system according to an embodiment of the present disclosure.

[0019] FIG. 2 is a flowchart illustrating a method of wireless communication performed by a user equipment (UE) according to an embodiment of the present disclosure.

[0020] FIG. 3 is a flowchart illustrating a method of wireless communication performed by a base station according to an embodiment of the present disclosure.

[0021] FIG. 4 is a schematic diagram illustrating a communication system including a base station (BS) and a UE according to an embodiment of the present disclosure.

[0022] FIG. 5 is a schematic diagram illustrating that a BS transmits 3 beams to the ground forming 3 footprints according to an embodiment of the present disclosure.

[0023] FIG. 6 is a schematic diagram illustrating that one or more bandwidth parts (BWPs) are configured at least by a starting resource block (RB) location and a number of RBs according to an embodiment of the present disclosure.

[0024] FIG. 7 is a schematic diagram illustrating that a target BWP and a UE will change an active BWP from a current BWP to the target BWP according to an embodiment of the present disclosure.

[0025] FIG. 8 is a schematic diagram illustrating that a UE derives a target BWP index according to a synchronization signal block (SSB) index/(CSI-RS) resource index with a BWP index mapping information provided by a network (such as a base station) according to an embodiment of the present disclosure. [0026] FIG. 9 is a schematic diagram illustrating a switching ordering among BWPs according to an embodiment of the present disclosure.

[0027] FIG. 10 is a schematic diagram illustrating a configuration of a BWP switching according to an embodiment of the present disclosure.

[0028] FIG. 11 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS

[0029] Embodiments of the present disclosure are described in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows. Specifically, the terminologies in the embodiments of the present disclosure are merely for describing the purpose of the certain embodiment, but not to limit the disclosure.

[0030] Due to a long distance between a satellite and a user equipment (UE) on the round, communication may suffer from pass-loss leading to a reduced coverage. To overcome this issue, beam-forming may be envisioned. The satellite will transmit or receive the signal using transmitter beam-forming or receiver beam-forming. However, when the satellite transmits multiple beams, footprints of neighboring beams might overlap partially, leading to potential interference. In order to reduce this interference, the neighboring beams may be transmitted in different frequency interval. In release 15 (R15), a bandwidth part (BWP) is introduced and the BWP can be used to differentiate multiple beams, such as different beams can be transmitted in different BWP and a network can control the BWP location such that neighboring beams cause minimum interference (e.g., they are transmitted in two BWPs that are not overlapped in frequency domain).

[0031] But on the other hand, due to extremely high satellite mobility, the beam projected to the earth will move during the time. Thus, how to make sure that the UEs can always receive with a good beam, as well as in a good frequency interval becomes an issue. In some embodiments of the present disclosure, a method to resolve this issue is provided.

[0032] In R15 new radio (NR), a BWP switching and beam switching can be separately performed. The beam switching was mainly motivated by a UE mobility causing beam coverage change. In this case, a UE-specific beam refinement is a more reasonable solution. For BWP switching, it is mainly motivated by a UE-specific service or power saving. For this reason, it is also technically solid for designing a UE-specific BWP switching mechanism.

[0033] Proposals for beam management in NTN that are discussed are summarized below: 1. It is proposed, for frequency reuse 1, rel-15 beam management can be used. For frequency reuse > 1, it is proposed that two Rel-15 based schemes are possible: (1) where one BWP is used for each satellite beam, and (2) where one component carrier is used per satellite beam. 2. It is proposed to consider additional beam management CSI-RS configurations to support different satellite implementation needs. 3. It is proposed to introduce a mechanism where the both the uplink (UL) and downlink (DL) BWPs are switched simultaneously using a single DCI to support fast satellite beam switching. 4. It is proposed that the concept of BWP can be used for frequency resource allocation among NTN beams, and that the network may configure a specific active BWP for UEs in a beam. 5. It is proposed to increase the number of BWPs for NTN.

[0034] The proposed solutions for beam management for NTN are quite diverse and convergence to one particular solution is not possible at the conclusion of a current study. Hence, the following conclusion is drawn for NTN beam management: The rel-15/16 beam management and BWP operation are considered as baseline for NTN. Beam management and BWP operation for NTN with frequency reuse are discussed further when specifications are developed. Note that service link switching is seen as a part of beam management mechanism in NR NTN.

[0035] In a non-terrestrial network (NTN) system, the beam changing is mostly due to satellite mobility instead of UE mobility. In this case, it is quite different from a true negation (TN) scenario, rendering UE-specific switching mechanism less efficient and unnecessary. Note that UE-specific beam switching or BWP switching can still be supported by the current specification. While a satellite-specific beam/BWP switching becomes more suitable in the NTN system.

[0036] FIG. 1A illustrates that, in some embodiments, one or more user equipments (UEs) 10 and a base station (e.g., gNB or eNB) 20 for transmission adjustment in a communication network system 30 (e.g., non-terrestrial network (NTN) or terrestrial network) according to an embodiment of the present disclosure are provided. The communication network system 30 includes the one or more UEs 10 and the base station 20. The one or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11 or 21 may be configured to implement proposed functions, procedures and/or methods described in this description. Layers of radio interface protocol may be implemented in the processor 11 or 21. The memory 12 or 22 is operatively coupled with the processor 11 or 21 and stores a variety of information to operate the processor 11 or 21. The transceiver 13 or 23 is operatively coupled with the processor 11 or 21, and the transceiver 13 or 23 transmits and/or receives a radio signal. [0037] The processor 11 or 21 may include application-specific integrated circuit (ASIC), other chipset, logic circuit and/or data processing device. The memory 12 or 22 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and/or other storage device. The transceiver 13 or 23 may include baseband circuitry to process radio frequency signals. When the embodiments are implemented in software, the techniques described herein can be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The modules can be stored in the memory 12 or 22 and executed by the processor 11 or 21. The memory 12 or 22 can be implemented within the processor 11 or 21 or external to the processor 11 or 21 in which case those can be communicatively coupled to the processor 11 or 21 via various means as is known in the art.

[0038] In some embodiments, the communication between the UE 10 and the base station 20 comprises non-terrestrial network (NTN) communication. In some embodiments, the base station 20 comprises a spaceborne platform or an airborne platform or a high-altitude platform station. The base station 20 can communicate with the UE 10 via a spaceborne platform or an airborne platform, e.g., NTN satellite 40, as illustrated in FIG. IB.

[0039] Spaceborne platform includes satellite and the satellite includes low earth orbiting (LEO) satellite, medium earth orbiting (MEO) satellite and geostationary earth orbiting (GEO) satellite. While the satellite is moving, the LEO and MEO satellite is moving with regard to a given location on earth. However, for GEO satellite, the GEO satellite is relatively static with regard to a given location on earth.

[0040] In some embodiments, the processor 11 is configured, by a base station, with a first BWP and a second BWP, wherein the first BWP is an active BWP, and the processor changes the active BWP from the first BWP to the second BWP based on at least a first information. This can solve issues in the prior art, provide a beam management for a non-terrestrial network (NTN) system, reduce a signaling overhead, provide a good communication performance, and/or provide high reliability.

[0041] In some embodiments, the processor 21 is configured to configure, to the UE 10, a first BWP and a second BWP, wherein the first BWP is an active BWP, and the UE 10 changes the active BWP from the first BWP to the second BWP based on at least a first information. This can solve issues in the prior art, provide a beam management for a non-terrestrial network (NTN) system, reduce a signaling overhead, provide a good communication performance, and/or provide high reliability.

[0042] FIG. 2 illustrates a method 200 of wireless communication by a user equipment (UE) according to an embodiment of the present disclosure. In some embodiments, the method 200 includes: a block 202, being configured, by a base station, with a first BWP and a second BWP, wherein the first BWP is an active BWP, and the UE changes the active BWP from the first BWP to the second BWP based on at least a first information. This can solve issues in the prior art, provide a beam management for a non-terrestrial network (NTN) system, reduce a signaling overhead, provide a good communication performance, and/or provide high reliability.

[0043] FIG. 3 illustrates a method 300 of wireless communication by a base station according to an embodiment of the present disclosure. In some embodiments, the method 300 includes: a block 302, configuring, to a user equipment (UE), a first BWP and a second BWP, wherein the first BWP is an active BWP, and the UE changes the active BWP from the first BWP to the second BWP based on at least a first information. This can solve issues in the prior art, provide a beam management for a non-terrestrial network (NTN) system, reduce a signaling overhead, provide a good communication performance, and/or provide high reliability.

[0044] In some embodiments, the first BWP and/or the second BWP is configured in a system information and/or a UE- specific radio resource control (RRC) signaling. In some embodiments, the system information comprises one or more system information blocks (SIBs). In some embodiments, the system information is transmitted in a physical downlink shared channel (PDSCH) or a narrowband physical downlink shared channel (NPDSCH). In some embodiments, the PDSCH or the NPDSCH is a cyclic redundancy check (CRC) scrambled with a system information radio network temporary identifier (SI-RNTI). In some embodiments, the first BWP is configured by a first starting resource block (RB) location and/or a first number of RBs and/or a first length. In some embodiments, the second BWP is configured by a second starting RB location and/or a second number of RBs and/or a second length. In some embodiments, the first starting RB location and/or the second starting RB location is configured according to a common resource block (CRB). In some embodiments, the first BWP comprises a first BWP index and the second BWP comprises a second BWP index. In some embodiments, the first information comprises a downlink control information (DCI). In some embodiments, the DCI comprises a group- common DCI. In some embodiments, the group common DCI comprises a DCI format 2_0.

[0045] In some embodiments, the DCI is received by the transceiver from the base station. In some embodiments, the DCI comprises a first indication field. In some embodiments, the UE changes the active BWP from the first BWP to the second BWP when the first indication field indicates the second BWP. In some embodiments, the first field indicating the second BWP comprises the first indication field indicating the second BWP index. In some embodiments, the first indication field comprises N bits, where N is an integer. In some embodiments, a value of N depends on the first BWP and the second BWP. In some embodiments, the UE changes the active BWP from the first BWP to the second BWP when the first indication field indicates a first value. In some embodiments, the first value is pre-defined.

[0046] In some embodiments, a relation that the first BWP is changed to the second BWP is pre-configured or pre defined. In some embodiments, the relation that the first BWP is changed to the second BWP comprises an ordering of a BWP switching. In some embodiments, the ordering of the BWP switching follows a BWP index ordering from a smallest index to a highest index or the highest index to the smallest index. In some embodiments, the UE changes the active BWP from the first BWP to the second BWP when the DCI is detected by the UE. In some embodiments, the UE changes the active BWP from the first BWP to the second BWP when the first indication field indicates a first beam index. In some embodiments, the first beam index comprises a synchronization signal block (SSB) index and/or a SSB candidate index and/or channel state information-reference signal (CSI-RS) resource index. In some embodiments, the first beam index is associated with the second BWP. In some embodiments, the first beam index is associated with the second BWP index. In some embodiments, the association between the first beam index and the second BWP index is pre-configured by the base station in the system information and/or an RRC signaling. In some embodiments, the association between the first beam index and the second BWP index is pre-defined.

[0047] In some embodiments, the first information comprises a first timer. In some embodiments, the UE changes the active BWP from the first BWP to the second BWP when the first timer expires. In some embodiments, the first timer is pre-configured by the base station or pre-defined. In some embodiments, the first timer is pre-configured by the base station in the system information and/or the RRC signaling. In some embodiments, the first timer is associated with the first BWP. In some embodiments, the first timer starts when the first BWP becomes the active BWP. In some embodiments, the UE changes the active BWP from the first BWP to a third BWP when a second timer expires. In some embodiments, the third BWP comprises a first default BWP or a first initial BWP. In some embodiments, the second timer comprises a BWP inactivity timer. In some embodiments, the first default BWP or the initial default BWP is pre-configured by the base station or pre-defined.

[0048] In some embodiments, the first default BWP or the initial default BWP is associated with the first BWP. In some embodiments, the first timer continues to run when the second timer is expired. In some embodiments, the second timer is stopped when the first timer is expired. In some embodiments, the UE changes the active BWP from the third BWP to the second BWP when the first timer expires. In some embodiments, the UE changes the active BWP from the third BWP to a fourth BWP when the first timer expires. In some embodiments, the fourth BWP comprises a second default BWP or a second initial BWP. In some embodiments, the second default BWP or the second initial BWP is associated with the second BWP. In some embodiments, the second default BWP or the second initial BWP is pre-configured by the base station or pre-defined. In some embodiments, a value of the first timer and a value of the second timer are different. In some embodiments, each of the first BWP and the second BWP comprises a downlink BWP and/or an uplink BWP.

[0049] FIG. 4 illustrates a communication system including a base station (BS) and a UE according to another embodiment of the present disclosure. Optionally, the communication system may include more than one base station, and each of the base stations may connect to one or more UEs. In this disclosure, there is no limit. As an example, the base station illustrated in FIG. 1A may be a moving base station, e.g., spaceborne vehicle (satellite) or airborne vehicle (drone). The UE can transmit transmissions to the base station and the UE can also receive the transmission from the base station. Optionally, not shown in FIG. 4, the moving base station can also serve as a relay which relays the received transmission from the UE to a ground base station or vice versa.

[0050] Spaceborne platform includes satellite and the satellite includes LEO satellite, MEO satellite and GEO satellite. While the satellite is moving, the LEO and MEO satellite is moving with regards to a given location on earth. However, for GEO satellite, the GEO satellite is relatively static with regards to a given location on earth. A moving base station or satellite, e.g., in particular for LEO satellite or drone, communicates with a user equipment (UE) on the ground. Due to long distance between the UE and the base station on satellite, the beamformed transmission is needed to extend the coverage. [0051] Optionally, as illustrated in FIG. 5, where a base station is integrated in a satellite or a drone, and the base station transmits one or more beams to the ground forming one or more coverage areas called footprint. In FIG. 5, an example illustrates that the BS transmits three beams (beam 1, beam 2 and beam3) to form three footprints (footprint 1, 2 and 3), respectively. Optionally, 3 beams are transmitted at 3 different frequencies. In this example, the bit position is associated with a beam. FIG. 5 illustrates that, in some embodiments, a moving base station, e.g., in particular for LEO satellite or drone, communicates with a user equipment (UE) on the ground. Due to long distance between the UE and the base station on satellite, the beamformed transmission is needed to extend the coverage. As illustrated in FIG. 5, where a base station is transmitting three beams to the earth forming three coverage areas called footpoints. Moreover, each beam may be transmitted at dedicated frequencies so that the beams for footprint 1, 2 and 3 are non-overlapped in a frequency domain. The advantage of having different frequencies corresponding to different beams is that the inter-beam interference can be minimized.

[0052] Example 1 :

[0053] FIG. 6 illustrates that one or more bandwidth parts (BWPs) are configured at least by a starting resource block (RB) location and a number of RBs according to an embodiment of the present disclosure. [0054] In some examples, a network (such as a base station) may configure cell-specific BWP configurations. The network configures one or more BWPs in a system information. The system information comprises at least a system information block (SIB). The system information is transmitted in a PDSCH or a NPDSCH. The PDSCH or NPDSCH is CRC scrambled with SI-RNTI. The one or more BWPs are configured at least by a starting RB location and a number of RBs as illustrated in FIG. 6. The locations of the one or more BWPs are configured according to a common resource block (CRB). The one or more BWPs comprise at least one of the followings: an initial BWP, a default BWP, or a BWP with integer index. Optionally, the configured BWP comprises a downlink BWP and/or an uplink BWP. In some examples, the network may update the one or more BWP configurations by transmitting an updated SIB. Optionally, the network may transmit an RRC signaling to a user equipment (UE) to inform the BWP configuration updates. Optionally, the network may provide the association between one or more SSB indexes (or one or more CSI-RS resource indexes) and the one or more BWP indexes. The information about the association is provided in the system information and/or a UE-specific RRC signaling.

[0055] Example 2:

[0056] FIG. 7 illustrates that a target BWP and a UE will change an active BWP from a current BWP to the target BWP according to an embodiment of the present disclosure. In some examples, a network transmits a group-common DCI in a PDCCH to a group of UEs to indicate a target DL BWP and/or UL BWP. For a UE who receives the group-common DCI, the UE will follow the DCI indication for the BWP switching. In some examples, the group-common DCI is carried in a PDCCH which is CRC scrambled with a RNTI. The RNTI may be shared by the group of UEs.

[0057] In some embodiments, in the DCI, it contains at least a first indication field which is used to indicate BWP change for DL and/or UL. In some examples, the first indication field contains N bits, where N is an integer. It may indicate a target BWP and the UE will change the active BWP from the current BWP to the target BWP as illustrated in FIG. 7. The network configures 3 BWPs, and the active BWP is BWP 1. The UE receives a group-common DCI in BWP 1 and the DCI indicates the target active BWP is BWP 2. Then the UE changes the active BWP from BWP 1 to BWP 2. After the BWP switching, the UE detects the group-common DCI in the new active BWP (BWP 2). Optionally, the target BWP index indicates the target active downlink BWP and/or target active uplink BWP.

[0058] Optionally, the value of N depends on the configured BWP, e.g., when configured BWP number is 4 (BWP 1, BWP 2, BWP 3, BWP 4), then N=2 bits. Thus, N=ceil(log2(L)) bits or N=max{ceil(log2(L)),l } bits. Here L is the number of the configured BWPs for switching, and ceil (c) stands for ceiling operation which results in a smallest integer that is greater than c. In some embodiments, the DCI comprises the group-common DCI. In some embodiments, the group common DCI comprises a DCI format 2_0.

[0059] Example 3:

[0060] FIG. 8 illustrates that a UE derives a target BWP index according to a synchronization signal block (SSB) index/(CSI-RS) resource index with a BWP index mapping information provided by a network (such as a base station) according to an embodiment of the present disclosure.

[0061] In some examples, the network indicates a target SSB index and/or a target CSI-RS index, then the UE derives a target BWP index according to the SSB index/ CSI-RS resource index with BWP index mapping information provided by the network as illustrated in FIG. 8. In FIG. 8, assuming the UE is provided by the network about the SSB index and BWP index mapping information, e.g. SSB 1 is associated with BWP 1, SSB 2 is associated with BWP 2, SSB 3 is associated with BWP 3. Then UE detects a group-common DCI in active BWP 1, and the DCI indicates a target SSB index is SSB 2. Based on the SSB/BWP mapping information, the UE will change the active BWP from BWP 1 to BWP 2, because the BWP 2 is associated with the target SSB index (SSB 2). It is to note that the BWP includes downlink BWP and/or uplink BWP.

[0062] Example 4:

[0063] FIG. 9 illustrates a switching ordering among BWPs according to an embodiment of the present disclosure. [0064] In some examples, the network may pre-configure the ordering of the BWP switching and/or the ordering of the SSB index switching and/or the ordering of the CSI-RS resource index switching. For example, the network may configure a set of BWPs, e.g., BWP 1, BWP 2, and BWP 3. The network further configures a switching ordering among these BWPs, e.g., as illustrated in FIG. 9, when UE’s active BWP is BWP 1, then if the BWP switch is triggered, the new active BWP is BWP 2. Similarly. In some embodiments, when the UE’s active BWP is BWP 2, and if the BWP switch is triggered, the new active BWP will become BWP 3. Optionally, the BWP switching order may be pre-defined, e.g., ordering follows the BWP index ordering from the smallest index to the highest index or the other way around. The advantage of pre-configure or pre-define the ordering is to avoid the indication of target BWP index, which results in a reduction of signaling overhead. For example, the first indication field in the group-common DCI presented in example 1 may contain 1 bit, which only indicates BWP to be changed or not changed (a value is used to indicate BWP to be changed, and the other value is used to indicate BWP not to be changed). When it indicates to change the BWP, the UE will follow the pre-configured or pre defined the BWP switching order to change to the target BWP. Optionally, the group-common DCI does not need to contain the first indication field. When a UE detects the DCI, e.g., passing the CRC check, the UE will assume the network triggers a BWP switching. Thus, when the UE detects the DCI, the UE will proceed with active BWP changing according to the pre defined or pre-configured BWP switching ordering. In some embodiments, the DCI comprises the group-common DCI. In some embodiments, the group common DCI comprises a DCI format 2_0.

[0065] Example 5:

[0066] FIG. 10 illustrates a configuration of a BWP switching according to an embodiment of the present disclosure [0067] In some examples, the BWP change may be triggered by a timer. The UE can be configured to initiate from a default BWP and the timer is set, when the timer expires the UE needs to change the active BWP. The target BWP can be pre-configured or pre-defined as presented in example 4. In some examples, the value of the timer is not constant between different BWPs. For example, the network may configure timer 1 for BWP 1, and timer 2 for BWP 2. Moreover, the BWP switching order is set to be from BWP 1 to BWP 2 and from BWP 2 to BWP 3. When the UE starts from BWP 1, the UE needs to wait until the timer 1 expires, then it switches to BWP 2, at the same time the UE runs the timer 2. When the timer 2 expires, the UE switches to BWP 3, and so on. In this example, the timer 1 and timer 2 may have different values. Optionally, they may be a same timer. The advantage is that the network does not need to indicate the BWP switch via DCI signaling, leading to a reduced signaling overhead.

[0068] In some examples, the network configures one or more default BWPs, each default BWP is associated with the above presented BWPs as illustrated in FIG. 10. For BWP 1, it has an associated default BWP, for each active BWP, the UE is configured with two type of timers. The first timer is an inactivity timer which is used to change the active BWP to an associated default BWP. While the second timer is used to switch to another BWP. The inactivity timer is similar to R15 38.213. But the difference is that there may be multiple default BWPs, each associated with a BWP. For example, FIG. 10 illustrates that, when the UE is switched to a BWP 1, it starts the first timer. At the same time, there is also an inactivity timer. One the inactivity timer is not expired, but the first timer is expired, the UE will switch to BWP 2. On the other hand, when the inactivity timer is expired before the first timer expires, the UE will switch to the default BWP associated with BWP 1. But the UE does not stop the first timer, when the first timer expires, the UE will switch to the default BWP associated with BWP 2. It is noted that in this example, the default BWP may also be replaced with initial BWP, the same method can be applied too.

[0069] It is to note that some of the examples presented previously may not be mutual exclusive and may be combined together. Thus, we do not give further examples for such combinations.

[0070] Commercial interests for some embodiments are as follows. 1. Solving issues in the prior art. 2. Providing a beam management for a non-terrestrial network (NTN) system. 3. Reducing a signaling overhead. 4. Providing a good communication performance. 5. Providing a high reliability. 6. Some embodiments of the present disclosure are used by 5G- NR chipset vendors, V2X communication system development vendors, automakers including cars, trains, trucks, buses, bicycles, moto-bikes, helmets, and etc., drones (unmanned aerial vehicles), smartphone makers, communication devices for public safety use, AR/VR device maker for example gaming, conference/seminar, education purposes. The deployment scenarios include, but not limited to, indoor hotspot, dense urban, urban micro, urban macro, rural, factor hall, and indoor D2D scenarios. Some embodiments of the present disclosure are a combination of “techniques/processes” that can be adopted in 3GPP specification to create an end product. Some embodiments of the present disclosure could be adopted in 5G NR licensed and/or non-licensed or shared spectrum communications. Some embodiments of the present disclosure propose technical mechanisms.

[0071] FIG. 11 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present disclosure. Embodiments described herein may be implemented into the system using any suitably configured hardware and/or software. FIG. 11 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, an application circuitry 730, a memory/storage 740, a display 750, a camera 760, a sensor 770, and an input/output (I/O) interface 780, coupled with each other at least as illustrated. The application circuitry 730 may include a circuitry such as, but not limited to, one or more single-core or multi-core processors. The processors may include any combination of general-purpose processors and dedicated processors, such as graphics processors, application processors. The processors may be coupled with the memory/storage and configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems running on the system.

[0072] The baseband circuitry 720 may include circuitry such as, but not limited to, one or more single-core or multi core processors. The processors may include a baseband processor. The baseband circuitry may handle various radio control functions that enables communication with one or more radio networks via the RF circuitry. The radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc. In some embodiments, the baseband circuitry may provide for communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuitry may support communication with an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMAN), a wireless local area network (WLAN), a wireless personal area network (WPAN). Embodiments in which the baseband circuitry is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.

[0073] In various embodiments, the baseband circuitry 720 may include circuitry to operate with signals that are not strictly considered as being in a baseband frequency. For example, in some embodiments, baseband circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency. The RF circuitry 710 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium. In various embodiments, the RF circuitry may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network. In various embodiments, the RF circuitry 710 may include circuitry to operate with signals that are not strictly considered as being in a radio frequency. For example, in some embodiments, RF circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency. [0074] In various embodiments, the transmitter circuitry, control circuitry, or receiver circuitry discussed above with respect to the user equipment, eNB, or gNB may be embodied in whole or in part in one or more of the RF circuitry, the baseband circuitry, and/or the application circuitry. As used herein, “circuitry” may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group), and/or a memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality. In some embodiments, the electronic device circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules. In some embodiments, some or all of the constituent components of the baseband circuitry, the application circuitry, and/or the memory/storage may be implemented together on a system on a chip (SOC). The memory/storage 740 may be used to load and store data and/or instructions, for example, for system. The memory/storage for one embodiment may include any combination of suitable volatile memory, such as dynamic random access memory (DRAM)), and/or non-volatile memory, such as flash memory.

[0075] In various embodiments, the I/O interface 780 may include one or more user interfaces designed to enable user interaction with the system and/or peripheral component interfaces designed to enable peripheral component interaction with the system. User interfaces may include, but are not limited to a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc. Peripheral component interfaces may include, but are not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power supply interface. In various embodiments, the sensor 770 may include one or more sensing devices to determine environmental conditions and/or location information related to the system. In some embodiments, the sensors may include, but are not limited to, a gyro sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit. The positioning unit may also be part of, or interact with, the baseband circuitry and/or RF circuitry to communicate with components of a positioning network, e.g., a global positioning system (GPS) satellite. [0076] In various embodiments, the display 750 may include a display, such as a liquid crystal display and a touch screen display. In various embodiments, the system 700 may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, an AR/VR glasses, etc. In various embodiments, system may have more or less components, and/or different architectures. Where appropriate, methods described herein may be implemented as a computer program. The computer program may be stored on a storage medium, such as a non-transitory storage medium.

[0077] A person having ordinary skill in the art understands that each of the units, algorithm, and steps described and disclosed in the embodiments of the present disclosure are realized using electronic hardware or combinations of software for computers and electronic hardware. Whether the functions run in hardware or software depends on the condition of application and design requirement for a technical plan. A person having ordinary skill in the art can use different ways to realize the function for each specific application while such realizations should not go beyond the scope of the present disclosure. It is understood by a person having ordinary skill in the art that he/she can refer to the working processes of the system, device, and unit in the above-mentioned embodiment since the working processes of the above-mentioned system, device, and unit are basically the same. For easy description and simplicity, these working processes will not be detailed. [0078] It is understood that the disclosed system, device, and method in the embodiments of the present disclosure can be realized with other ways. The above-mentioned embodiments are exemplary only. The division of the units is merely based on logical functions while other divisions exist in realization. It is possible that a plurality of units or components are combined or integrated in another system. It is also possible that some characteristics are omitted or skipped. On the other hand, the displayed or discussed mutual coupling, direct coupling, or communicative coupling operate through some ports, devices, or units whether indirectly or communicatively by ways of electrical, mechanical, or other kinds of forms. [0079] The units as separating components for explanation are or are not physically separated. The units for display are or are not physical units, that is, located in one place or distributed on a plurality of network units. Some or all of the units are used according to the purposes of the embodiments. Moreover, each of the functional units in each of the embodiments can be integrated in one processing unit, physically independent, or integrated in one processing unit with two or more than two units.

[0080] If the software function unit is realized and used and sold as a product, it can be stored in a readable storage medium in a computer. Based on this understanding, the technical plan proposed by the present disclosure can be essentially or partially realized as the form of a software product. Or, one part of the technical plan beneficial to the conventional technology can be realized as the form of a software product. The software product in the computer is stored in a storage medium, including a plurality of commands for a computational device (such as a personal computer, a server, or a network device) to run all or some of the steps disclosed by the embodiments of the present disclosure. The storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a floppy disk, or other kinds of media capable of storing program codes.

[0081] While the present disclosure has been described in connection with what is considered the most practical and preferred embodiments, it is understood that the present disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements made without departing from the scope of the broadest interpretation of the appended claims.

Claims

What is claimed is:

1. A wireless communication method by a user equipment (UE), comprising: being configured, by a base station, with a first BWP and a second BWP, wherein the first BWP is an active BWP, and the UE changes the active BWP from the first BWP to the second BWP based on at least a first information.

2. The method of claim 1, wherein the first BWP and/or the second BWP is configured in a system information and/or a UE- specific radio resource control (RRC) signaling.

3. The method of claim 2, wherein the system information comprises one or more system information blocks (SIBs).

4. The method of any one of claims 1 to 3, wherein the system information is transmitted in a physical downlink shared channel (PDSCH) or a narrowband physical downlink shared channel (NPDSCH).

5. The method of claim 4, wherein the PDSCH or the NPDSCH is a cyclic redundancy check (CRC) scrambled with a system information radio network temporary identifier (SI-RNTI).

6. The method of any one of claims 1 to 5, wherein the first BWP is configured by a first starting resource block (RB) location and/or a first number of RBs and/or a first length.

7. The method of any one of claims 1 to 6, wherein the second BWP is configured by a second starting RB location and/or a second number of RBs and/or a second length.

8. The method of any one of claims 1 to 7, wherein the first starting RB location and/or the second starting RB location is configured according to a common resource block (CRB).

9. The method of any one of claims 1 to 8, wherein the first BWP comprises a first BWP index and the second BWP comprises a second BWP index.

10. The method of any one of claims 1 to 9, wherein the first information comprises a downlink control information (DCI).

11. The method of claim 10, wherein the DCI comprises a group-common DCI.

12. The method of claim 11, wherein the group common DCI comprises a DCI format 2_0.

13. The method of any one of claims 10 to 12, wherein the DCI is received by the transceiver from the base station.

14. The method of any one of claims 10 to 13, wherein the DCI comprises a first indication field.

15. The method of claim 14, wherein the UE changes the active BWP from the first BWP to the second BWP when the first indication field indicates the second BWP.

16. The method of claim 15, wherein the first field indicating the second BWP comprises the first indication field indicating the second BWP index.

17. The method of any one of claims 14 to 16, wherein the first indication field comprises N bits, where N is an integer.

18. The method of claim 17, wherein a value of N depends on the first BWP and the second BWP.

19. The method of any one of claims 14 to 18, wherein the UE changes the active BWP from the first BWP to the second

BWP when the first indication field indicates a first value.

20. The method of claim 19, wherein the first value is pre-defined.

21. The method of any one of claims 1 to 20, wherein a relation that the first BWP is changed to the second BWP is pre configured or pre-defined.

22. The method of claim 21, wherein the relation that the first BWP is changed to the second BWP comprises an ordering of a BWP switching.

23. The method of claim 22, wherein the ordering of the BWP switching follows a BWP index ordering from a smallest index to a highest index or the highest index to the smallest index.

24. The method of any one of claims 10 to 23, wherein the UE changes the active BWP from the first BWP to the second

BWP when the DCI is detected by the UE.

25. The method of any one of claims 14 to 24, wherein the UE changes the active BWP from the first BWP to the second BWP when the first indication field indicates a first beam index.

26. The method of claim 25, wherein the first beam index comprises a synchronization signal block (SSB) index and/or a SSB candidate index and/or channel state information-reference signal (CSI-RS) resource index.

27. The method of claim 25 or 26, wherein the first beam index is associated with the second BWP.

28. The method of any one of claims 25 to 27, wherein the first beam index is associated with the second BWP index.

29. The method of claim 28, wherein the association between the first beam index and the second BWP index is pre configured by the base station in the system information and/or an RRC signaling.

30. The method of claim 28, wherein the association between the first beam index and the second BWP index is pre-defined.

31. The method of any one of claims 1 to 30, wherein the first information comprises a first timer.

32. The method of claim 31, wherein the UE changes the active BWP from the first BWP to the second BWP when the first timer expires.

33. The method of claim 31 or 32, wherein the first timer is pre-configured by the base station or pre-defined.

34. The method of any one of claims 31 to 33, wherein the first timer is pre-configured by the base station in the system information and/or the RRC signaling.

35. The method of any one of claims 31 to 34, wherein the first timer is associated with the first BWP.

36. The method of any one of claims 31 to 35, wherein the first timer starts when the first BWP becomes the active BWP.

37. The method of any one of claims 31 to 36, wherein the UE changes the active BWP from the first BWP to a third BWP when a second timer expires.

38. The method of claim 37, wherein the third BWP comprises a first default BWP or a first initial BWP.

39. The method of claim 37 or 38, wherein the second timer comprises a BWP inactivity timer.

40. The method of claim 38 or 39, wherein the first default BWP or the initial default BWP is pre-configured by the base station or pre-defined.

41. The method of any one of claims 38 to 40, wherein the first default BWP or the initial default BWP is associated with the first BWP.

42. The method of any one of claims 37 to 41, wherein the first timer continues to run when the second timer is expired.

43. The method of any one of claims 37 to 42, wherein the second timer is stopped when the first timer is expired.

44. The method of any one of claims 37 to 43, wherein the UE changes the active BWP from the third BWP to the second

BWP when the first timer expires.

45. The method of any one of claims 37 to 44, wherein the UE changes the active BWP from the third BWP to a fourth BWP when the first timer expires.

46. The method of claim 45, wherein the fourth BWP comprises a second default BWP or a second initial BWP.

47. The method of claim 46, wherein the second default BWP or the second initial BWP is associated with the second BWP.

48. The method of claim 46 or 47, wherein the second default BWP or the second initial BWP is pre-configured by the base station or pre-defined.

49. The method of any one of claims 37 to 47, wherein a value of the first timer and a value of the second timer are different.

50. The method of any one of claims 1 to 49, wherein each of the first BWP and the second BWP comprises a downlink BWP and/or an uplink BWP.

51. A wireless communication method by a base station, comprising: configuring, to a user equipment (UE), a first BWP and a second BWP, wherein the first BWP is an active BWP, and the UE changes the active BWP from the first BWP to the second BWP based on at least a first information.

52. The method of claim 51, wherein the first BWP and/or the second BWP is configured in a system information and/or a UE-specific radio resource control (RRC) signaling.

53. The method of claim 52, wherein the system information comprises one or more system information blocks (SIBs).

54. The method of any one of claims 51 to 53, wherein the system information is transmitted in a physical downlink shared channel (PDSCH) or a narrowband physical downlink shared channel (NPDSCH).

55. The method of claim 54, wherein the PDSCH or the NPDSCH is a cyclic redundancy check (CRC) scrambled with a system information radio network temporary identifier (SI-RNTI).

56. The method of any one of claims 51 to 55, wherein the first BWP is configured by a first starting resource block (RB) location and/or a first number of RBs and/or a first length.

57. The method of any one of claims 51 to 56, wherein the second BWP is configured by a second starting RB location and/or a second number of RBs and/or a second length.

58. The method of any one of claims 51 to 57, wherein the first starting RB location and/or the second starting RB location is configured according to a common resource block (CRB).

59. The method of any one of claims 51 to 58, wherein the first BWP comprises a first BWP index and the second BWP comprises a second BWP index.

60. The method of any one of claims 51 to 59, wherein the first information comprises a downlink control information (DCI).

61. The method of claim 60, wherein the DCI comprises a group-common DCI.

62. The method of claim 61, wherein the group common DCI comprises a DCI format 2_0.

63. The method of any one of claims 60 to 62, wherein the DCI is transmitted to the UE by the base station.

64. The method of any one of claims 60 to 63, wherein the DCI comprises a first indication field.

65. The method of claim 64, wherein the UE changes the active BWP from the first BWP to the second BWP when the first indication field indicates the second BWP.

66. The method of claim 65, wherein the first field indicating the second BWP comprises the first indication field indicating the second BWP index.

67. The method of any one of claims 64 to 66, wherein the first indication field comprises N bits, where N is an integer.

68. The method of claim 67, wherein a value of N depends on the first BWP and the second BWP.

69. The method of any one of claims 64 to 68, wherein the UE changes the active BWP from the first BWP to the second BWP when the first indication field indicates a first value.

70. The method of claim 69, wherein the first value is pre-defined.

71. The method of any one of claims 51 to 70, wherein a relation that the first BWP is changed to the second BWP is pre configured or pre-defined.

72. The method of claim 71, wherein the relation that the first BWP is changed to the second BWP comprises an ordering of a BWP switching.

73. The method of claim 72, wherein the ordering of the BWP switching follows a BWP index ordering from a smallest index to a highest index or the highest index to the smallest index.

74. The method of any one of claims 60 to 73, wherein the UE changes the active BWP from the first BWP to the second BWP when the DCI is detected by the UE.

75. The method of any one of claims 64 to 74, wherein the UE changes the active BWP from the first BWP to the second BWP when the first indication field indicates a first beam index.

76. The method of claim 75, wherein the first beam index comprises a synchronization signal block (SSB) index and/or a SSB candidate index and/or channel state information-reference signal (CSI-RS) resource index.

77. The method of claim 75 or 76, wherein the first beam index is associated with the second BWP.

78. The method of any one of claims 75 to 77, wherein the first beam index is associated with the second BWP index.

79. The method of claim 78, wherein the association between the first beam index and the second BWP index is pre configured by the base station in the system information and/or an RRC signaling.

80. The method of claim 78, wherein the association between the first beam index and the second BWP index is pre-defined.

81. The method of any one of claims 51 to 80, wherein the first information comprises a first timer.

82. The method of claim 81, wherein the UE changes the active BWP from the first BWP to the second BWP when the first timer expires.

83. The method of claim 81 or 82, wherein the first timer is pre-configured by the base station or pre-defined.

84. The method of any one of claims 81 to 83, wherein the first timer is pre-configured by the base station in the system information and/or the RRC signaling.

85. The method of any one of claims 81 to 84, wherein the first timer is associated with the first BWP.

86. The method of any one of claims 81 to 85, wherein the first timer starts when the first BWP becomes the active BWP.

87. The method of any one of claims 81 to 86, wherein the UE changes the active BWP from the first BWP to a third BWP when a second timer expires.

88. The method of claim 87, wherein the third BWP comprises a first default BWP or a first initial BWP.

89. The method of claim 87 or 88, wherein the second timer comprises a BWP inactivity timer.

90. The method of claim 88 or 89, wherein the first default BWP or the initial default BWP is pre-configured by the base station or pre-defined.

91. The method of any one of claims 88 to 90, wherein the first default BWP or the initial default BWP is associated with the first BWP.

92. The method of any one of claims 87 to 91, wherein the first timer continues to run when the second timer is expired.

93. The method of any one of claims 87 to 92, wherein the second timer is stopped when the first timer is expired.

94. The method of any one of claims 87 to 93, wherein the UE changes the active BWP from the third BWP to the second

BWP when the first timer expires.

95. The method of any one of claims 87 to 94, wherein the UE changes the active BWP from the third BWP to a fourth BWP when the first timer expires.

96. The method of claim 95, wherein the fourth BWP comprises a second default BWP or a second initial BWP.

97. The method of claim 96, wherein the second default BWP or the second initial BWP is associated with the second BWP.

98. The method of claim 96 or 97, wherein the second default BWP or the second initial BWP is pre-configured by the base station or pre-defined.

99. The method of any one of claims 87 to 97, wherein a value of the first timer and a value of the second timer are different.

100. The method of any one of claims 51 to 99, wherein each of the first BWP and the second BWP comprises a downlink BWP and/or an uplink BWP.

101. Auser equipment (UE), comprising: a memory; a transceiver; and a processor coupled to the memory and the transceiver; wherein the processor is configured, by a base station, with a first BWP and a second BWP, wherein the first BWP is an active BWP, and the processor changes the active BWP from the first BWP to the second BWP based on at least a first information.

102. The UE of claim 101, wherein the first BWP and/or the second BWP is configured in a system information and/or a UE-specific radio resource control (RRC) signaling.

103. The UE of claim 102, wherein the system information comprises one or more system information blocks (SIBs).

104. The UE of any one of claims 101 to 103, wherein the system information is transmitted in a physical downlink shared channel (PDSCH) or a narrowband physical downlink shared channel (NPDSCH).

105. The UE of claim 104, wherein the PDSCH or the NPDSCH is a cyclic redundancy check (CRC) scrambled with a system information radio network temporary identifier (SI-RNTI).

106. The UE of any one of claims 101 to 105, wherein the first BWP is configured by a first starting resource block (RB) location and/or a first number of RBs and/or a first length.

107. The UE of any one of claims 101 to 106, wherein the second BWP is configured by a second starting RB location and/or a second number of RBs and/or a second length.

108. The UE of any one of claims 101 to 107, wherein the first starting RB location and/or the second starting RB location is configured according to a common resource block (CRB).

109. The UE of any one of claims 101 to 108, wherein the first BWP comprises a first BWP index and the second BWP comprises a second BWP index.

110. The UE of any one of claims 101 to 109, wherein the first information comprises a downlink control information (DCI).

111. The UE of claim 110, wherein the DCI comprises a group-common DCI.

112. The UE of claim 111, wherein the group common DCI comprises a DCI format 2_0.

113. The UE of any one of claims 110 to 112, wherein the DCI is received by the UE from the base station.

114. The UE of any one of claims 110 to 113, wherein the DCI comprises a first indication field.

115. The UE of claim 114, wherein the processor changes the active BWP from the first BWP to the second BWP when the first indication field indicates the second BWP.

116. The UE of claim 115, wherein the first field indicating the second BWP comprises the first indication field indicating the second BWP index.

117. The UE of any one of claims 114 to 116, wherein the first indication field comprises N bits, where N is an integer.

118. The UE of claim 117, wherein a value of N depends on the first BWP and the second BWP.

119. The UE of any one of claims 114 to 118, wherein the processor changes the active BWP from the first BWP to the second BWP when the first indication field indicates a first value.

120. The UE of claim 119, wherein the first value is pre-defined.

121. The UE of any one of claims 101 to 120, wherein a relation that the first BWP is changed to the second BWP is pre configured or pre-defined.

122. The UE of claim 121, wherein the relation that the first BWP is changed to the second BWP comprises an ordering of a BWP switching.

123. The UE of claim 122, wherein the ordering of the BWP switching follows a BWP index ordering from a smallest index to a highest index or the highest index to the smallest index.

124. The UE of any one of claims 110 to 123, wherein the processor changes the active BWP from the first BWP to the second BWP when the DCI is detected by the processor.

125. The UE of any one of claims 114 to 124, wherein the processor changes the active BWP from the first BWP to the second BWP when the first indication field indicates a first beam index.

126. The UE of claim 125, wherein the first beam index comprises a synchronization signal block (SSB) index and/or a SSB candidate index and/or channel state information-reference signal (CSI-RS) resource index.

127. The UE of claim 125 or 126, wherein the first beam index is associated with the second BWP.

128. The UE of any one of claims 125 to 127, wherein the first beam index is associated with the second BWP index.

129. The UE of claim 128, wherein the association between the first beam index and the second BWP index is pre-configured by the base station in the system information and/or an RRC signaling.

130. The UE of claim 128, wherein the association between the first beam index and the second BWP index is pre-defined.

131. The UE of any one of claims 101 to 130, wherein the first information comprises a first timer.

132. The UE of claim 131, wherein the processor changes the active BWP from the first BWP to the second BWP when the first timer expires.

133. The UE of claim 131 or 132, wherein the first timer is pre-configured by the base station or pre-defined.

134. The UE of any one of claims 131 to 133, wherein the first timer is pre-configured by the base station in the system information and/or the RRC signaling.

135. The UE of any one of claims 131 to 134, wherein the first timer is associated with the first BWR

136. The UE of any one of claims 131 to 135, wherein the first timer starts when the first BWP becomes the active BWR

137. The UE of any one of claims 131 to 136, wherein the processor changes the active BWP from the first BWP to a third

BWP when a second timer expires.

138. The UE of claim 137, wherein the third BWP comprises a first default BWP or a first initial BWP.

139. The UE of claim 137 or 138, wherein the second timer comprises a BWP inactivity timer.

140. The UE of claim 138 or 139, wherein the first default BWP or the initial default BWP is pre-configured by the base station or pre-defined.

141. The UE of any one of claims 138 to 140, wherein the first default BWP or the initial default BWP is associated with the first BWP.

142. The UE of any one of claims 137 to 141, wherein the first timer continues to run when the second timer is expired.

143. The UE of any one of claims 137 to 142, wherein the second timer is stopped when the first timer is expired.

144. The UE of any one of claims 137 to 143, wherein the processor changes the active BWP from the third BWP to the second BWP when the first timer expires.

145. The UE of any one of claims 137 to 144, wherein the processor changes the active BWP from the third BWP to a fourth BWP when the first timer expires.

146. The UE of claim 145, wherein the fourth BWP comprises a second default BWP or a second initial BWP.

147. The UE of claim 146, wherein the second default BWP or the second initial BWP is associated with the second BWP.

148. The UE of claim 146 or 147, wherein the second default BWP or the second initial BWP is pre-configured by the base station or pre-defined.

149. The UE of any one of claims 137 to 147, wherein a value of the first timer and a value of the second timer are different.

150. The UE of any one of claims 101 to 149, wherein each of the first BWP and the second BWP comprises a downlink

BWP and/or an uplink BWP.

151. Abase station, comprising: a memory; a transceiver; and a processor coupled to the memory and the transceiver; wherein the processor is configured to configure, to a user equipment (UE), a first BWP and a second BWP, wherein the first BWP is an active BWP, and the UE changes the active BWP from the first BWP to the second BWP based on at least a first information.

152. The base station of claim 151, wherein the first BWP and/or the second BWP is configured in a system information and/or a UE-specific radio resource control (RRC) signaling.

153. The base station of claim 152, wherein the system information comprises one or more system information blocks (SIBs).

154. The base station of any one of claims 151 to 153, wherein the system information is transmitted in a physical downlink shared channel (PDSCH) or a narrowband physical downlink shared channel (NPDSCH).

155. The base station of claim 154, wherein the PDSCH or the NPDSCH is a cyclic redundancy check (CRC) scrambled with a system information radio network temporary identifier (SI-RNTI).

156. The base station of any one of claims 151 to 155, wherein the first BWP is configured by a first starting resource block (RB) location and/or a first number of RBs and/or a first length.

157. The base station of any one of claims 151 to 156, wherein the second BWP is configured by a second starting RB location and/or a second number of RBs and/or a second length.

158. The base station of any one of claims 151 to 157, wherein the first starting RB location and/or the second starting RB location is configured according to a common resource block (CRB).

159. The base station of any one of claims 151 to 158, wherein the first BWP comprises a first BWP index and the second BWP comprises a second BWP index.

160. The base station of any one of claims 151 to 159, wherein the first information comprises a downlink control information (DCI).

161. The base station of claim 160, wherein the DCI comprises a group-common DCI.

162. The base station of claim 161, wherein the group common DCI comprises a DCI format 2_0.

163. The base station of any one of claims 160 to 162, wherein the DCI is transmitted to the UE by the transceiver.

164. The base station of any one of claims 160 to 163, wherein the DCI comprises a first indication field.

165. The base station of claim 164, wherein the UE changes the active BWP from the first BWP to the second BWP when the first indication field indicates the second BWP.

166. The base station of claim 165, wherein the first field indicating the second BWP comprises the first indication field indicating the second BWP index.

167. The base station of any one of claims 64 to 66, wherein the first indication field comprises N bits, where N is an integer.

168. The base station of claim 167, wherein a value of N depends on the first BWP and the second BWP.

169. The base station of any one of claims 164 to 168, wherein the UE changes the active BWP from the first BWP to the second BWP when the first indication field indicates a first value.

170. The base station of claim 169, wherein the first value is pre-defined.

171. The base station of any one of claims 151 to 170, wherein a relation that the first BWP is changed to the second BWP is pre-configured or pre-defined.

172. The base station of claim 171, wherein the relation that the first BWP is changed to the second BWP comprises an ordering of a BWP switching.

173. The base station of claim 172, wherein the ordering of the BWP switching follows a BWP index ordering from a smallest index to a highest index or the highest index to the smallest index.

174. The base station of any one of claims 160 to 173, wherein the UE changes the active BWP from the first BWP to the second BWP when the DCI is detected by the UE.

175. The base station of any one of claims 164 to 174, wherein the UE changes the active BWP from the first BWP to the second BWP when the first indication field indicates a first beam index.

176. The base station of claim 175, wherein the first beam index comprises a synchronization signal block (SSB) index and/or a SSB candidate index and/or channel state information-reference signal (CSI-RS) resource index.

177. The base station of claim 175 or 176, wherein the first beam index is associated with the second BWP.

178. The base station of any one of claims 175 to 177, wherein the first beam index is associated with the second BWP index.

179. The base station of claim 178, wherein the association between the first beam index and the second BWP index is pre configured by the processor in the system information and/or an RRC signaling.

180. The base station of claim 178, wherein the association between the first beam index and the second BWP index is pre defined.

181. The base station of any one of claims 151 to 180, wherein the first information comprises a first timer.

182. The base station of claim 181, wherein the UE changes the active BWP from the first BWP to the second BWP when the first timer expires.

183. The base station of claim 181 or 182, wherein the first timer is pre-configured by the processor or pre-defined.

184. The base station of any one of claims 181 to 183, wherein the first timer is pre-configured by the processor in the system information and/or the RRC signaling.

185. The base station of any one of claims 181 to 184, wherein the first timer is associated with the first BWR

186. The base station of any one of claims 181 to 185, wherein the first timer starts when the first BWP becomes the active BWR

187. The base station of any one of claims 181 to 186, wherein the UE changes the active BWP from the first BWP to a third BWP when a second timer expires.

188. The base station of claim 187, wherein the third BWP comprises a first default BWP or a first initial BWP.

189. The base station of claim 187 or 188, wherein the second timer comprises a BWP inactivity timer.

190. The base station of claim 188 or 189, wherein the first default BWP or the initial default BWP is pre-configured by the processor or pre-defined.

191. The base station of any one of claims 188 to 190, wherein the first default BWP or the initial default BWP is associated with the first BWP.

192. The base station of any one of claims 187 to 191, wherein the first timer continues to run when the second timer is expired.

193. The base station of any one of claims 187 to 192, wherein the second timer is stopped when the first timer is expired.

194. The base station of any one of claims 187 to 193, wherein the UE changes the active BWP from the third BWP to the second BWP when the first timer expires.

195. The base station of any one of claims 187 to 194, wherein the UE changes the active BWP from the third BWP to a fourth BWP when the first timer expires.

196. The base station of claim 195, wherein the fourth BWP comprises a second default BWP or a second initial BWP.

197. The base station of claim 196, wherein the second default BWP or the second initial BWP is associated with the second BWP.

198. The base station of claim 196 or 197, wherein the second default BWP or the second initial BWP is pre-configured by the processor or pre-defined.

199. The base station of any one of claims 187 to 197, wherein a value of the first timer and a value of the second timer are different.

200. The base station of any one of claims 151 to 199, wherein each of the first BWP and the second BWP comprises a downlink BWP and/or an uplink BWP.

201. A non- transitory machine-readable storage medium having stored thereon instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 100.

202. A chip, comprising: a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the method of any one of claims 1 to 100.

203. A computer readable storage medium, in which a computer program is stored, wherein the computer program causes a computer to execute the method of any one of claims 1 to 100.

204. A computer program product, comprising a computer program, wherein the computer program causes a computer to execute the method of any one of claims 1 to 100.

205. A computer program, wherein the computer program causes a computer to execute the method of any one of claims 1 to 100.