WO2022208124A1

WO2022208124A1 - Apparatus and method of wireless communication

Info

Publication number: WO2022208124A1
Application number: PCT/IB2021/000294
Authority: WO
Inventors: Hao Lin
Original assignee: Orope France Sarl
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2022-10-06

Abstract

An apparatus and a method of wireless communication are provided. The method by a user equipment (UE) includes being configured by a higher layer to receive a channel state information reference signal (CSI-RS) in one or more symbols and determining to receive the CSI-RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co-located (QCL) assumption of the CSI-RS. This can solve issues in the prior art, provide a channel access relevant indication for more than one scheduled uplink transmission by a same downlink control indicator (DCI) in a shared spectrum, reduce 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] In an unlicensed band, an unlicensed spectrum is a shared spectmm. Communication equipment in different communication systems can use the unlicensed spectrum as long as the unlicensed meets regulatory requirements set by countries or regions on a spectmm. There is no need to apply for a proprietary spectmm authorization from a government.

[0003] In order to allow various communication systems that use the unlicensed spectmm for wireless communication to coexist friendly in the spectmm, some countries or regions specify regulatory requirements that must be met to use the unlicensed spectmm. For example, a communication device follows a listen before talk (LBT) or channel access procedure, that is, the communication device needs to perform a channel sensing before transmitting a signal on a channel. When an LBT outcome illustrates that the channel is idle, the communication device can perform signal transmission; otherwise, the communication device cannot perform signal transmission. In order to ensure fairness, once a communication device successfully occupies the channel, a transmission duration cannot exceed a maximum channel occupancy time (MCOT). LBT mechanism is also called a channel access procedure. In new radio (NR) Release 16, there are different types of channel access procedures, e.g., type 1, type 2A, type 2B and type 2C channel access procedures as described in TS 37.213.

[0004] Towards higher carrier frequency above 52.6 GHz, due to a severe pass loss, an omni directional transmission will suffer significant coverage limitation. A straightforward solution is to use beam-formed transmission, so that transmission energy can be more focused on the destination, resulting in an increased receive signal-to-noise ratio (SNR). Similarly, for unlicensed band above 52.6 GHz, e.g., 60 GHz band, beamformed transmission will be used. On the other hand, channel access procedure (or called listen-before-talk (LBT)) is still suggested by the regulation. In this case, the legacy channel access procedure may not be suitable for higher frequency due to the fact that the legacy channel access mechanism does not consider beam forming feature. [0005] Therefore, there is a need for an apparatus and a method for channel access mechanism over higher frequency, in which beam-forming technique is considered.

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, determine a quasi co-located (QCL) information of a configured periodic channel state information reference signal (CSI-RS), provide a channel access mechanism over higher frequency, in which beam-forming technique is considered, 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 higher layer to receive a channel state information reference signal (CSI-RS) in one or more symbols and determining to receive the CSI- RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co located (QCL) assumption of the CSI-RS.

[0008] In a second aspect of the present disclosure, a method of wireless communication by a base station comprises controlling a higher layer on a user equipment (UE) side to configure a UE to receive a channel state information reference signal (CSI-RS) in one or more symbols and controlling the UE to determine to receive the CSI-RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co-located (QCL) assumption of the CSI-RS. [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 higher layer to receive a channel state information reference signal (CSI-RS) in one or more symbols. The processor is configured to determine to receive the CSI-RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co-located (QCL) assumption of the CSI-RS.

[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 control a higher layer on a user equipment (UE) side to configure a UE to receive a channel state information reference signal (CSI-RS) in one or more symbols. The processor is configured to control the UE to determine to receive the CSI-RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co-located (QCL) assumption of the CSI-RS. [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 illustrate the embodiments of the present disclosure or related art more clearly, 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. 1 is a block diagram of one or more user equipments (UEs) and a base station (e.g., gNB) of communication in a communication network system according to an embodiment of the present disclosure.

[0018] FIG. 2 is a schematic diagram illustrating an example user plane protocol stack according to an embodiment of the present disclosure.

[0019] FIG. 3 is a schematic diagram illustrating an example control plane protocol stack according to an embodiment of the present disclosure.

[0020] FIG. 4 is a flowchart illustrating a method of wireless communication performed by a user equipment (UE) according to an embodiment of the present disclosure.

[0021] FIG. 5 is a flowchart illustrating a method of wireless communication performed by a base station according to an embodiment of the present disclosure.

[0022] FIG. 6 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS [0023] Embodiments of the present disclosure are described in detail with the technical matters, stmctural 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.

[0024] For uplink transmissions in a shared spectrum, a user equipment (UE) may perform a channel access procedure before transmitting one or more uplink transmissions in a channel. The channel access procedure comprises a type 1 channel access according to section 4.2.1.1 of TS37.213, or a type 2A channel access according to section 4.2.1.2.1 of TS37.213, or a type 2B channel access according to section 4.2.1.2.2 of TS37.213, or a type 2C channel access according to section 4.2.1.2.3 of TS37.213.

[0025] FIG. 1 illustrates that, in some embodiments, one or more user equipments (UEs) 10 and a base station (e.g., gNB) 20 for transmission adjustment in a communication network system 30 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.

[0026] 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.

[0027] FIG. 2 illustrates an example user plane protocol stack according to an embodiment of the present disclosure. FIG. 2 illustrates that, in some embodiments, in the user plane protocol stack, where service data adaptation protocol (SDAP), packet data convergence protocol (PDCP), radio link control (RLC), and media access control (MAC) sublayers and physical (PHY) layer may be terminated in a UE 10 and a base station 20 (such as gNB) on a network side. In an example, a PHY layer provides transport services to higher layers (e.g. MAC, RRC, etc.). In an example, services and functions of a MAC sublayer may comprise mapping between logical channels and transport channels, multiplexing/demultiplexing of MAC service data units (SDUs) belonging to one or different logical channels into/from transport blocks (TBs) delivered to/from the PHY layer, scheduling information reporting, error correction through hybrid automatic repeat request (HARQ) (e.g. one HARQ entity per carrier in case of carrier aggregation (CA)), priority handling between UEs by means of dynamic scheduling, priority handling between logical channels of one UE by means of logical channel prioritization, and/or padding. A MAC entity may support one or multiple numerologies and/or transmission timings. In an example, mapping restrictions in a logical channel prioritization may control which numerology and/or transmission timing a logical channel may use. In an example, an RLC sublayer may supports transparent mode (TM), unacknowledged mode (UM) and acknowledged mode (AM) transmission modes. The RLC configuration may be per logical channel with no dependency on numerologies and/or transmission time interval (TTI) durations. In an example, automatic repeat request (ARQ) may operate on any of the numerologies and/or TTI durations the logical channel is configured with. In an example, services and functions of the PDCP layer for the user plane may comprise sequence numbering, header compression, and decompression, transfer of user data, reordering and duplicate detection, PDCP PDU routing (e.g. in case of split bearers), retransmission of PDCP SDUs, ciphering, deciphering and integrity protection, PDCP SDU discard, PDCP re establishment and data recovery for RLC AM, and/or duplication of PDCP PDUs. In an example, services and functions of SDAP may comprise mapping between a QoS flow and a data radio bearer. In an example, services and functions of SDAP may comprise mapping quality of service Indicator (QFI) in downlink (DL) and uplink (UL) packets. In an example, a protocol entity of SDAP may be configured for an individual PDU session.

[0028] FIG. 3 illustrates an example control plane protocol stack according to an embodiment of the present disclosure. FIG. 2 illustrates that, in some embodiments, in the control plane protocol stack where PDCP, RLC, and MAC sublayers and PHY layer may be terminated in a UE 10 and a base station 20 (such as gNB) on a network side and perform service and functions described above. In an example, RRC used to control a radio resource between the UE and a base station (such as a gNB). In an example, RRC may be terminated in a UE and the gNB on a network side. In an example, services and functions of RRC may comprise broadcast of system information related to AS and NAS, paging initiated by 5GC or RAN, establishment, maintenance and release of an RRC connection between the UE and RAN, security functions including key management, establishment, configuration, maintenance and release of signaling radio bearers (SRBs) and data radio bearers (DRBs), mobility functions, QoS management functions, UE measurement reporting and control of the reporting, detection of and recovery from radio link failure, and/or NAS message transfer to/from NAS from/to a UE. In an example, NAS control protocol may be terminated in the UE and AMF on a network side and may perform functions such as authentication, mobility management between a UE and a AMF for 3GPP access and non-3GPP access, and session management between a UE and a SMF for 3GPP access and non-3GPP access.

[0029] In some embodiments, the processor 11 is configured by a higher layer to receive a channel state information reference signal (CSI-RS) in one or more symbols. The processor 11 is configured to determine to receive the CSI-RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co-located (QCL) assumption of the CSI-RS. This can solve issues in the prior art, determine a quasi co-located (QCL) information of a configured periodic channel state information reference signal (CSI-RS), provide a channel access mechanism over higher frequency, in which beam-forming technique is considered, provide a good communication performance, and/or provide high reliability.

[0030] In some embodiments, the processor 21 is configured to control a higher layer on a user equipment (UE) side to configure the UE 10 to receive a channel state information reference signal (CSI-RS) in one or more symbols. The processor 21 is configured to control the UE 10 to determine to receive the CSI-RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co-located (QCL) assumption of the CSI-RS. This can solve issues in the prior art, determine a quasi co-located (QCL) information of a configured periodic channel state information reference signal (CSI-RS), provide a channel access mechanism over higher frequency, in which beam-forming technique is considered, provide a good communication performance, and/or provide high reliability.

[0031] FIG. 4 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 higher layer to receive a channel state information reference signal (CSI-RS) in one or more symbols, and a block 204, determining to receive the CSI-RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co-located (QCL) assumption of the CSI-RS. This can solve issues in the prior art, determine a quasi co-located (QCL) information of a configured periodic channel state information reference signal (CSI-RS), provide a channel access mechanism over higher frequency, in which beam forming technique is considered, provide a good communication performance, and/or provide high reliability. [0032] FIG. 5 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, controlling a higher layer on a user equipment (UE) side to configure a UE to receive a channel state information reference signal (CSI-RS) in one or more symbols, and a block 304, controlling the UE to determine to receive the CSI-RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co-located (QCL) assumption of the CSI-RS. This can solve issues in the prior art, determine a quasi co-located (QCL) information of a configured periodic channel state information reference signal (CSI-RS), provide a channel access mechanism over higher frequency, in which beam-forming technique is considered, provide a good communication performance, and/or provide high reliability.

[0033] In some embodiments, the higher layer comprises a radio resource control (RRC) layer used to control a radio resource between the UE and a base station. In some embodiments, determining to receive the CSI-RS in the one or more symbols according to the information relevant to the CSI-RS, with the QCL assumption of the CSI-RS comprises that: when the one or more symbols are within a channel occupancy of the base station, the UE determines to receive the CSI-RS in the one or more symbols. In some embodiments, the UE determines the QCL assumption of the CSI-RS by a first QCL information. In some embodiments, the first QCL information is provided by the base station by a parameter corresponding to the CSI-RS. In some embodiments, the parameter comprises qcl-InfoPeriodicCSI-RS. In some embodiments, the parameter is configured in an information element (IE). In some embodiments, the IE comprises NZP-CSI-RS-Resource IE. In some embodiments, the channel occupancy of the base station is determined by the UE from a downlink control information (DCI). In some embodiments, the one or more symbols within the channel occupancy of the base station comprises that one or more frequency domain resources of the CSI-RS are within a frequency domain channel occupancy of the base station.

[0034] In some embodiments, the frequency domain channel occupancy of the base station is provided in the DCI. In some embodiments, the DCI comprises a DCI format 2_0. In some embodiments, determining to receive the CSI-RS in the one or more symbols according to the information relevant to the CSI-RS, with the QCL assumption of the CSI-RS comprises that: if at least one symbol of the one or more symbols are overlapped in time domain with a downlink transmission, the UE determines to receive the CSI-RS in the one or more symbols. In some embodiments, the UE determines the QCL assumption of the CSI-RS by a second QCL information, if at least one symbol of the one or more symbols are overlapped in time domain with the downlink transmission. In some embodiments, the UE is scheduled by a DCI to receive the downlink transmission.

[0035] In some embodiments, the second QCL information comprises a QCL assumption of the downlink transmission. In some embodiments, the UE determines the QCL assumption of the CSI- RS by the second QCL information comprising that the CSI-RS and a demodulation reference signal (DMRS) of the downlink transmission are quasi co-located (QCL’ed) with type D. In some embodiments, a QCL information of an antenna port of the DMRS of the downlink transmission is provided by the DCI scheduling the downlink transmission. In some embodiments, the QCL information of the antenna port of the DMRS of the downlink transmission is determined by a pre defined rule or pr-configured. In some embodiments, the downlink transmission comprises a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a control resource set (CORESET), or a synchronization signal block (SSB). In some embodiments, the DCI comprises a DCI format 2_0.

[0036] Some embodiments of the present disclosure provide an apparatus (such as a user equipment (UE) and/or a base station) and a method of wireless communication for channel access mechanism over higher frequency, in which a transmission and a reception in high frequency consider both a channel access outcome and also a beam forming. This can solve issues in the prior art, determine a quasi co-located (QCL) information of a configured periodic channel state information reference signal (CSI-RS), provide a channel access mechanism over higher frequency, in which beam-forming technique is considered, provide a good communication performance, and/or provide high reliability.

[0037] In some embodiments, in communication systems, a UE may be configured by a network or a base station (such as a gNB) with one or more periodic downlink reference signals, e.g. periodic CSI-RS. From Release 15 or Release 16 specification, the configured periodic CSI-RS is also configured with QCL information, e.g. with qcl-InfoPeriodicCSI-RS parameter in NZP-CSI- RS-Resource information element (IE). In this case, when the UE receives the configured periodic CSI-RS, the UE can assume that the CSI-RS is QCL’ed with the indicated reference signal provided by the qcl-InfoPeriodicCSI-RS parameter. Moreover, when the qcl-InfoPeriodicCSI-RS parameter provides QCL’ed reference signal with QCL type D, the UE can assume a same spatial receive (Rx) parameter for the reception of the periodic CSI-RS and for the reception of the indicated reference signal by the qcl-InfoPeriodicCSI-RS parameter.

[0038] In some embodiments, in a shared spectrum operation, the network or the base station (such as gNB) performs a channel sensing before transmitting the configured periodic CSI-RS. If the channel is sensed to be idle, the network or the base station (such as gNB) can transmit; or otherwise, the transmission is not allowed. Due to the fact that the outcome of the channel sensing is random, the UE cannot ensure that on the configured resources, the periodic CSI-RS will be present. In some embodiments of the present disclosure, some methods are provided for the UE to determine a QCL information of a configured periodic CSI-RS.

[0039] In some examples, when a UE is configured by a higher layer (such as RRC of the UE as illustrated in FIG. 4 and FIG. 5) to receive CSI-RS in one or more symbols, the UE can receive the CSI-RS in the one or more symbols, when CSI-RS resources are within a channel occupancy of a base station, and the UE can assume that a QCL information of the CSI-RS is the same as a QCL information provided by qcl-InfoPeriodicCSI-RS parameter corresponding to the CSI-RS. [0040] In some examples, when a UE is configured by a higher layer to receive CSI-RS in one or more symbols, and the UE is also scheduled by a DCI to receive a downlink transmission, where the downlink transmission may be a PDSCH. If at least one symbol of the one or more symbols is overlapped in time domain with the PDSCH, the UE can receive the CSI-RS in the one or more symbols. Moreover, the UE can assume that CSI-RS is QCL’ed type D with an antenna port of a DMRS of the PDSCH. Optionally, the downlink transmission may also be PDCCH or CORESET or SSB. In some examples, the QCL information of the antenna port of the DMRS of the PDSCH is provided by the DCI scheduling the PDSCH. Optionally, the QCL information of the antenna port of the DMRS of the PDSCH is determined by a pre-defined rule. Optionally, the QCL information of the antenna port of the DMRS of the PDSCH is pre-configured.

[0041] In some examples, the channel occupancy of the base station is determined by the UE from a DCI format 2_0. In some examples, the one or more symbols are within the channel occupancy of the base station includes that a frequency domain resource of the CSI-RS are within a frequency domain channel occupancy of the base station, where the frequency domain channel occupancy of the base station is provided in a DCI format 2_0.

[0042] Commercial interests for some embodiments are as follows. 1. Solving issues in the prior art. 2. Determining a quasi co-located (QCL) information of a configured periodic channel state information reference signal (CSI-RS). 3. Providing a channel access mechanism over higher frequency. 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. 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 the 5G NR licensed and non-licensed or shared spectrum communications. Some embodiments of the present disclosure propose technical mechanisms.

[0043] FIG. 7 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. 7 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 (FO) 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 instmctions stored in the memory/storage to enable various applications and/or operating systems running on the system.

[0044] 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.

[0045] 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.

[0046] 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 instmctions, 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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. 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.

[0051] 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. [0052] 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 higher layer to receive a channel state information reference signal (CSI- RS) in one or more symbols; and determining to receive the CSI-RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co-located (QCL) assumption of the CSI-RS.

2. The method of claim 1 , wherein the higher layer comprises a radio resource control (RRC) layer used to control a radio resource between the UE and a base station.

3. The method of claim 1 or 2, wherein determining to receive the CSI-RS in the one or more symbols according to the information relevant to the CSI-RS, with the QCL assumption of the CSI-RS comprises that: when the one or more symbols are within a channel occupancy of the base station, the UE determines to receive the CSI-RS in the one or more symbols.

4. The method of claim 3, wherein the UE determines the QCL assumption of the CSI-RS by a first QCL information.

5. The method of claim 4, wherein the first QCL information is provided by the base station by a parameter corresponding to the CSI-RS.

6. The method of claim 5, wherein the parameter comprises qcl-InfoPeriodicCSTRS.

7. The method of claim 5 or 6, wherein the parameter is configured in an information element (IE).

8. The method of claim 7, wherein the IE comprises NZP-CSI-RS-Resource IE.

9. The method of any one of claims 3 to 8, wherein the channel occupancy of the base station is determined by the UE from a downlink control information (DCI).

10. The method of any one of claims 3 to 9, wherein the one or more symbols within the channel occupancy of the base station comprises that one or more frequency domain resources of the CSI- RS are within a frequency do ain channel occupancy of the base station.

11. The method of claim 10, wherein the frequency domain channel occupancy of the base station is provided in the DCI.

12. The method of any one of claims 9 to 11, wherein the DCI comprises a DCI format 2_0.

13. The method of claim 1 or 2, wherein determining to receive the CSI-RS in the one or more symbols according to the information relevant to the CSI-RS, with the QCL assumption of the CSI-RS comprises that: if at least one symbol of the one or more symbols are overlapped in time domain with a downlink transmission, the UE determines to receive the CSI-RS in the one or more symbols.

14. The method of claim 13, wherein the UE determines the QCL assumption of the CSI-RS by a second QCL information, if at least one symbol of the one or more symbols are overlapped in time domain with the downlink transmission.

15. The method of claim 14, wherein the UE is scheduled by a DCI to receive the downlink transmission.

16. The method of claim 15, wherein the second QCL information comprises a QCL assumption of the downlink transmission.

17. The method of claim 16, wherein the UE determines the QCL assumption of the CSI-RS by the second QCL information comprising that the CSI-RS and a demodulation reference signal (DMRS) of the downlink transmission are quasi co-located (QCL’ed) with type D.

18. The method of claim 17, wherein a QCL information of an antenna port of the DMRS of the downlink transmission is provided by the DCI scheduling the downlink transmission.

19. The method of claim 18, wherein the QCL information of the antenna port of the DMRS of the downlink transmission is determined by a pre-defined rule or pr-configured.

20. The method of any one of claims 13 to 19, wherein the downlink transmission comprises a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a control resource set (CORESET), or a synchronization signal block (SSB).

21. The method of any one of claims 15 to 20, wherein the DCI comprises a DCI format 2_0.

22. A wireless communication method by a base station, comprising: controlling a higher layer on a user equipment (UE) side to configure a UE to receive a channel state information reference signal (CSI-RS) in one or more symbols; and controlling the UE to determine to receive the CSI-RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co-located (QCL) assumption of the CSI-RS.

23. The method of claim 22, wherein the higher layer comprises a radio resource control (RRC) layer used to control a radio resource between the UE and the base station.

24. The method of claim 22 or 23, wherein controlling the UE to determine to receive the CSI-RS in the one or more symbols according to the information relevant to the CSI-RS, with the QCL assumption of the CSI-RS comprises that: when the one or more symbols are within a channel occupancy of the base station, the base station controls the UE to determine to receive the CSI-RS in the one or more symbols.

25. The method of claim 24, wherein the base station controls the UE to determine the QCL assumption of the CSI-RS by a first QCL information.

26. The method of claim 25, wherein the first QCL information is provided by the base station by a parameter corresponding to the CSI-RS.

27. The method of claim 26, wherein the parameter comprises qcl-InfoPeriodicCSI-RS.

28. The method of claim 26 or 27, wherein the parameter is configured in an information element (IE).

29. The method of claim 28, wherein the IE comprises NZP-CSTRS-Resource IE.

30. The method of any one of claims 24 to 29, wherein the channel occupancy of the base station is determined by the UE from a downlink control information (DCI).

31. The method of any one of claims 24 to 30, wherein the one or more symbols within the channel occupancy of the base station comprises that one or more frequency domain resources of the CSI- RS are within a frequency domain channel occupancy of the base station.

32. The method of claim 31 , wherein the frequency domain channel occupancy of the base station is provided in the DCI.

33. The method of any one of claims 30 to 32, wherein the DCI comprises a DCI format 2_0.

34. The method of claim 22 or 23, wherein controlling the UE to determine to receive the CSI-RS in the one or more symbols according to the information relevant to the CSI-RS, with the QCL assumption of the CSI-RS comprises that: if at least one symbol of the one or more symbols are overlapped in time domain with a downlink transmission, the base station controls the UE to determine to receive the CSI-RS in the one or more symbols.

35. The method of claim 34, wherein the base station controls the UE to determine the QCL assumption of the CSI-RS by a second QCL information, if at least one symbol of the one or more symbols are overlapped in time domain with the downlink transmission.

36. The method of claim 35, wherein the UE is scheduled by a DCI to receive the downlink transmission.

37. The method of claim 36, wherein the second QCL information comprises a QCL assumption of the downlink transmission.

38. The method of claim 37, wherein the base station controls the UE to determine the QCL assumption of the CSI-RS by the second QCL information comprising that the CSI-RS and a demodulation reference signal (DMRS) of the downlink transmission are quasi co-located (QCL’ed) with type D.

39. The method of claim 38, wherein a QCL information of an antenna port of the DMRS of the downlink transmission is provided by the DCI scheduling the downlink transmission.

40. The method of claim 39, wherein the QCL information of the antenna port of the DMRS of the downlink transmission is determined by a pre-defined rule or pr-configured.

41. The method of any one of claims 34 to 40, wherein the downlink transmission comprises a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a control resource set (CORESET), or a synchronization signal block (SSB).

42. The method of any one of claims 36 to 41, wherein the DCI comprises a DCI format 2_0.

43. A user equipment (UE), comprising: a memory; a transceiver; and a processor coupled to the memory and the transceiver; wherein the processor is configured by a higher layer to receive a channel state information reference signal (CSI-RS) in one or more symbols; and wherein the processor is configured to determine to receive the CSI-RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co-located (QCL) assumption of the CSI-RS.

44. The UE of claim 43, wherein the higher layer comprises a radio resource control (RRC) layer used to control a radio resource between the UE and a base station.

45. The UE of claim 43 or 44, wherein determining to receive the CSI-RS in the one or more symbols according to the information relevant to the CSI-RS, with the QCL assumption of the CSI-RS comprises that: when the one or more symbols are within a channel occupancy of the base station, the processor determines to receive the CSI-RS in the one or more symbols.

46. The UE of claim 45, wherein the processor determines the QCL assumption of the CSI-RS by a first QCL information.

47. The UE of claim 46, wherein the first QCL information is provided by the base station by a parameter corresponding to the CSI-RS.

48. The UE of claim 47, wherein the parameter comprises qcl-InfoPeriodicCSI-RS.

49. The UE of claim 47 or 48, wherein the parameter is configured in an information element (IE).

50. The UE of claim 49, wherein the IE comprises NZP-CSTRS-Resource IE.

51. The UE of any one of claims 45 to 50, wherein the channel occupancy of the base station is determined by the UE from a downlink control information (DCI).

52. The UE of any one of claims 45 to 51 , wherein the one or more symbols within the channel occupancy of the base station comprises that one or more frequency domain resources of the CSI- RS are within a frequency domain channel occupancy of the base station.

53. The UE of claim 52, wherein the frequency domain channel occupancy of the base station is provided in the DCI.

54. The UE of any one of claims 51 to 53, wherein the DCI comprises a DCI format 2_0.

55. The UE of claim 43 or 44, wherein determining to receive the CSI-RS in the one or more symbols according to the information relevant to the CSI-RS, with the QCL assumption of the CSI-RS comprises that: if at least one symbol of the one or more symbols are overlapped in time domain with a downlink transmission, the processor determines to receive the CSI-RS in the one or more symbols.

56. The UE of claim 55, wherein the processor determines the QCL assumption of the CSI-RS by a second QCL information, if at least one symbol of the one or more symbols are overlapped in time domain with the downlink transmission.

57. The UE of claim 56, wherein the processor is scheduled by a DCI to receive the downlink transmission.

58. The UE of claim 57, wherein the second QCL information comprises a QCL assumption of the downlink transmission.

59. The UE of claim 58, wherein the processor determines the QCL assumption of the CSI-RS by the second QCL information comprising that the CSI-RS and a demodulation reference signal (DMRS) of the downlink transmission are quasi co-located (QCL’ed) with type D.

60. The UE of claim 59, wherein a QCL information of an antenna port of the DMRS of the downlink transmission is provided by the DCI scheduling the downlink transmission.

61. The UE of claim 60, wherein the QCL information of the antenna port of the DMRS of the downlink transmission is determined by a pre-defined rule or pr-configured.

62. The UE of any one of claims 55 to 61, wherein the downlink transmission comprises a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a control resource set (CORESET), or a synchronization signal block (SSB).

63. The UE of any one of claims 57 to 62, wherein the DCI comprises a DCI format 2_0.

64. A base station, comprising: a memory; a transceiver; and a processor coupled to the memory and the transceiver; wherein the processor is configured to control a higher layer on a user equipment (UE) side to configure a UE to receive a channel state information reference signal (CSI-RS) in one or more symbols; and wherein the processor is configured to control the UE to determine to receive the CSI-RS in the one or more symbols according to information relevant to the CSI-RS, with a quasi co-located (QCL) assumption of the CSI-RS.

65. The base station of claim 64, wherein the higher layer comprises a radio resource control (RRC) layer used to control a radio resource between the UE and the base station.

66. The base station of claim 64 or 65, wherein controlling the UE to determine to receive the CSI- RS in the one or more symbols according to the information relevant to the CSI-RS, with the QCL assumption of the CSI-RS comprises that: when the one or more symbols are within a channel occupancy of the base station, the processor controls the UE to determine to receive the CSI-RS in the one or more symbols.

67. The base station of claim 66, wherein the processor controls the UE to determine the QCL assumption of the CSI-RS by a first QCL information.

68. The base station of claim 67, wherein the first QCL information is provided by the processor by a parameter corresponding to the CSI-RS.

69. The base station of claim 68, wherein the parameter comprises qcl-InfoPeriodicCSI-RS.

70. The base station of claim 68 or 69, wherein the parameter is configured in an information element (IE).

71. The base station of claim 70, wherein the IE comprises NZP-CSTRS-Resource IE.

72. The base station of any one of claims 66 to 71, wherein the channel occupancy of the base station is determined by the UE from a downlink control information (DCI).

73. The base station of any one of claims 66 to 72, wherein the one or more symbols within the channel occupancy of the base station comprises that one or more frequency domain resources of the CSI-RS are within a frequency domain channel occupancy of the base station.

74. The base station of claim 73, wherein the frequency domain channel occupancy of the base station is provided in the DCI.

75. The base station of any one of claims 72 to 74, wherein the DCI comprises a DCI format 2_0.

76. The base station of claim 64 or 65, wherein controlling the UE to determine to receive the CSI- RS in the one or more symbols according to the information relevant to the CSI-RS, with the QCL assumption of the CSI-RS comprises that: if at least one symbol of the one or more symbols are overlapped in time domain with a downlink transmission, the base station controls the UE to determine to receive the CSI-RS in the one or more symbols.

77. The base station of claim 76, wherein the processor controls the UE to determine the QCL assumption of the CSI-RS by a second QCL information, if at least one symbol of the one or more symbols are overlapped in time domain with the downlink transmission.

78. The base station of claim 77, wherein the UE is scheduled by a DCI to receive the downlink transmission.

79. The base station of claim 78, wherein the second QCL information comprises a QCL assumption of the downlink transmission.

80. The base station of claim 79, wherein the processor controls the UE to determine the QCL assumption of the CSI-RS by the second QCL information comprising that the CSI-RS and a demodulation reference signal (DMRS) of the downlink transmission are quasi co-located (QCL’ed) with type D.

81. The base station of claim 80, wherein a QCL information of an antenna port of the DMRS of the downlink transmission is provided by the DCI scheduling the downlink transmission.

82. The base station of claim 81, wherein the QCL information of the antenna port of the DMRS of the downlink transmission is determined by a pre-defined rule or pr-configured.

83. The base station of any one of claims 76 to 82, wherein the downlink transmission comprises a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a control resource set (CORESET), or a synchronization signal block (SSB).

84. The base station of any one of claims 78 to 83, wherein the DCI comprises a DCI format 2_0.

85. 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 42.

86. 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 42.

87. 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 42.

88. 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 42.

89. A computer program, wherein the computer program causes a computer to execute the method of any one of claims 1 to 42.