Apparatus and method for transmitting and receiving channel state information (CSI) reports for downlink (DL) bandwidth part (BWP)

Abstract

The present disclosure relates to pre-fifth generation (5G) or 5G communication systems that will be provided to support higher data rates than fourth generation (4G) communication systems (such as long term evolution (LTE)). Apparatus and methods for channel state information (CSI) measurement and reporting outside an active downlink (DL) bandwidth part (BWP). A method for a user equipment includes: receiving a first set of DL BWPs, a reference signal (RS) resource set in a second set of DL BWPs, and a configuration of CSI reports corresponding to the second set of DL BWPs; receiving RS resources from an RS resource set in a third set of DL BWPs; and determining a first number of CSI reports based on the received RS resources. The method also includes determining a second number of CSI reports, the second number of CSI reports having (i) a value of a CSI report amount greater than that of other CSI reports from the first number of CSI reports, and (ii) a corresponding DL BWP index, and transmitting a channel including the second number of CSI reports and the index.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communication systems, and more particularly to CSI measurement and reporting. Background Art

[0002] To meet the increased demand for wireless data traffic since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G (pre-5G) communication systems. Therefore, 5G or pre-5G communication systems are also referred to as "beyond 4G networks" or "post-LTE systems."

[0003] 5G communication systems are expected to be implemented in higher frequency (mmWave) bands (e.g., the 60 GHz band) to achieve higher data rates. To reduce radio wave propagation losses and increase transmission distances, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technologies are being discussed in 5G communication systems.

[0004] In addition, in 5G communication systems, system network improvements are being developed based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), and receiver-side interference cancellation.

[0005] In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) have been developed as advanced coded modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as advanced access technologies.

[0006] Fifth generation (5G) or new radio (NR) mobile communications have recently been gathering momentum with all the global technical activities for various candidate technologies from industry and academia. Candidate implementations of 5G / NR mobile communications include massive antenna technology from traditional cellular frequency bands up to high frequencies to provide beamforming gain and support increased capacity, new waveforms (e.g., new radio access technologies (RATs)) to flexibly accommodate various services / applications with different requirements, new multiple access schemes to support large-scale connections, and more. Summary of the Invention

[0007] Technical issues

[0008] The present disclosure relates to an apparatus and method for efficiently transmitting and receiving CSI reports for DL ​​BWPs.

[0009] The present disclosure relates to CSI measurement and reporting outside of the active DL BWP.

[0010] Solution

[0011] In one embodiment, a user equipment (UE) in a wireless communication system is provided. The UE includes a transceiver and a processor, the processor being configured to receive information about a first configuration of a first set of downlink (DL) bandwidth parts (BWPs) from a base station via the transceiver, wherein each DL BWP in the first set of DL BWPs has an index, information about a second configuration of a reference signal (RS) resource set in a second set of DL BWPs that is a subset of the first set of DL BWPs, information about a third configuration of channel state information (CSI) reports corresponding to the second set of DL BWPs, and information about RS resources from the RS resource set in the third set of DL BWPs that is a subset of the second set of DL BWPs, determine a first number of CSI reports based on the received information about the RS resources, determine a second number of CSI reports from the first number of CSI reports, the second number of CSI reports having a value indicating a CSI report amount and a value indicating a corresponding DL BWP. Information of a BWP index, a value of a CSI report amount is greater than a value of a CSI report amount in other CSI reports from a first number of CSI reports, and a second number of CSI reports are sent to a base station on a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) via a transceiver, the second number of CSI reports having a value of the CSI report amount and information indicating a corresponding DL BWP index.

[0012] In another embodiment, a base station (BS) in a wireless communication system is provided. The BS includes a transceiver and a processor, the processor being configured to: transmit, via the transceiver, information about a first configuration of a first group of downlink (DL) bandwidth parts (BWPs), wherein each DL BWP in the first group of DL BWPs has an index, information about a second configuration of reference signal (RS) resource sets in a second group of DL BWPs that is a subset of the first group of DL BWPs, information about a third configuration of channel state information (CSI) reports corresponding to the second group of DL BWPs, and information about RS resources from the RS resource sets in a third group of DL BWPs that is a subset of the second group of DL BWPs; and receive, via the transceiver, a number of CSI reports and information indicating corresponding DL BWP indices on a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

[0013] In another embodiment, a method performed by a user equipment (UE) in wireless communication is provided. The method includes receiving information about a first configuration of a first set of DL BWPs, wherein each DL BWP in the first set of DL BWPs has an index, information about a second configuration of RS resource sets in a second set of DL BWPs that is a subset of the first set of DL BWPs, information about a third configuration of CSI reports corresponding to the second set of DL BWPs, and information about RS resources from the RS resource sets in a third set of DL BWPs that is a subset of the second set of DL BWPs. The method also includes determining a first number of CSI reports based on the received information about the RS resources; determining a second number of CSI reports from the first number of CSI reports, the second number of CSI reports having (i) a value of a CSI report amount and (ii) information indicating a corresponding DL BWP index, the value of the CSI report amount being greater than a value of a CSI report amount in other CSI reports from the first number of CSI reports; and transmitting a PUCCH or PUSCH including the second number of CSI reports, the second number of CSI reports having the value of the CSI report amount and information indicating a corresponding DL BWP index.

[0014] In another embodiment, a method performed by a base station in wireless communication is provided. The method includes transmitting information about a first configuration of a first set of downlink (DL) bandwidth parts (BWPs), wherein each DL BWP in the first set of DL BWPs has an index, information about a second configuration of reference signal (RS) resource sets in a second set of DL BWPs that is a subset of the first set of DL BWPs, information about a third configuration of channel state information (CSI) reports corresponding to the second set of DL BWPs, and information about RS resources from the RS resource sets in a third set of DL BWPs that is a subset of the second set of DL BWPs; and receiving a certain number of CSI reports and information indicating the corresponding DL BWP indexes on a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

[0015] Other technical features will be apparent to those skilled in the art from the following drawings, description, and claims.

[0016] Before proceeding with the detailed description below, it may be beneficial to set forth the definitions of certain words and phrases used in this patent document. The term "couple" and its derivatives refer to any direct or indirect communication between two or more elements, regardless of whether these elements are in physical contact with each other. The terms "send," "receive," and "communicate," and their derivatives, include direct and indirect communication. The terms "include," "comprise," and their derivatives, mean unlimited inclusion. The term "or" is inclusive, meaning and / or. The phrase "associated" and its derivatives mean including, being included within, interconnected with, containing, being contained within, connected to or connected with, coupled to or coupled with, communicable, cooperating, interleaved, juxtaposed, close to, being combined with or combined with, having, having properties, having a relationship with, or having a relationship with, etc. The term "controller" refers to any device, system, or part thereof that controls at least one operation. Such a controller can be implemented using hardware or a combination of hardware and software and / or firmware. The functionality associated with any particular controller can be centralized or distributed, whether local or remote. When used with a list of items, the phrase "at least one of" means that different combinations of one or more of the listed items can be used, and only one of the items in the list may be needed. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A, B, and C.

[0017] In addition, the various functions described below can be implemented or supported by one or more computer programs, each of which is formed of a computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, processes, functions, objects, classes, instances, related data, or a portion thereof that is suitable for implementation with a suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), random access memory (RAM), hard drive, compact disc (CD), digital video disc (DVD), or any other type of memory. "Non-transient" computer-readable media does not include wired, wireless, optical, or other communication links that transmit instantaneous electrical or other signals. Non-transient computer-readable media include media that can permanently store data and media that can store data and rewrite it later, such as rewritable optical discs or erasable storage devices.

[0018] Definitions for other specific words and phrases are provided throughout this patent document. Those of ordinary skill in the art should understand that in many, if not most, instances, such definitions apply to prior, as well as future uses of such defined words and phrases. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, wherein like reference numerals represent like parts:

[0020] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0021] Figure 2 An example gNB according to an embodiment of the present disclosure is shown.

[0022] Figure 3 An example UE according to an embodiment of the present disclosure is shown;

[0023] Figure 4 shows an example measurement gap configuration according to an embodiment of the present disclosure;

[0024] Figure 5 An example method of a UE procedure for CSI measurement and reporting according to an embodiment of the present disclosure is shown;

[0025] Figure 6 shows an example timeline of aperiodic CSI reporting for four DL BWPs according to an embodiment of the present disclosure;

[0026] Figure 7 An example method of a UE procedure for aperiodic CSI reporting of one or more DL BWPs according to an embodiment of the present disclosure is shown;

[0027] Figure 8 An example method of a UE procedure for CSI measurement according to an embodiment of the present disclosure is shown;

[0028] Figure 9 shows an example timeline of CSI measurements according to an embodiment of the present disclosure;

[0029] Figure 10 An example method of a UE procedure for periodic or semi-persistent CSI reporting according to an embodiment of the present disclosure is shown;

[0030] Figure 11 An example method of a UE procedure for aperiodic CSI measurement according to an embodiment of the present disclosure is shown;

[0031] Figure 12 An example method illustrating UE procedures for aperiodic CSI reporting for multiple DL BWPs according to an embodiment of the present disclosure is shown; and

[0032] Figure 13 An example timeline of aperiodic CSI measurement and reporting according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0033] Discussed below Figures 1 to 13 The various embodiments used to describe the principles of the present disclosure in this patent document are merely exemplary and should not be interpreted in any way as limiting the scope of the present disclosure. Those skilled in the art will understand that the principles of the present disclosure can be implemented in any suitably arranged system or device.

[0034] The following documents are incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 38.211 v15.5.0, "NR; Physical channels and modulation"; 3GPP TS 38.212 v15.5.0, "NR; Multiplexing and channel coding"; 3GPP TS 38.213 v15.5.0, "NR; Physical layer procedures for control"; 3GPP TS 38.214 v15.5.0, "NR; Physical layer procedures for data"; and 3GPP TS 38.215 v15.5.0, "NR; Physical layer procedures for data" and 3GPP TS 38.216 v15.5.0, "NR; Physical layer procedures for control" and 3GPP TS 38.217 v15.5.0, "NR; Physical layer procedures for data" and 3GPP TS 38.218 v15.5.0, "NR; Physical layer procedures for data" and 3GPP TS 38.219 v15.5.0, "NR; Physical channels and modulation" and 3GPP TS 38.211 v15.5.0, "NR; Physical channels and modulation" and 3GPP TS 38.212 v15.5.0, "NR; Multiplexing and channel coding" and 3GPP TS 38.219 v15.5.0, "NR; Physical layer procedures for control" and v15.5.0, "NR; Physical layer procedures for data"); 3GPP TS 38.215 v15.5.0, "NR; Physical layer measurements"; 3GPP TS 38.321 v15.5.0, "NR; Medium Access Control (MAC) protocol specification"; 3GPP TS 38.321 v15.5.0, "NR; Medium Access Control (MAC) protocol specification"; 3GPP TS 38.331 v15.5.0, "NR; Radio Resource Control (RRC) protocol specification"; 3GPP TS 38.331 v15.5.0, "NR; Radio Resource Control (RRC) protocol specification"; 3GPP TS 38.304 v15.5.0, "NR; User Equipment (UE) procedures" in Idle mode and RRC Inactive State" (3GPP TS 38.304 v15.5.0, "NR; User Equipment (UE) procedures in Idle mode and RRC Inactive State") and 3GPP TS 38.133 v16.0.0,"NR; Requirements for support of radio resource management"(3GPP TS 38.133v16.0.0, "NR; Requirements for support of radio resource management"). .

[0035] The discussion of 5G systems and their associated frequency bands is for reference only, as certain embodiments of the present disclosure may be implemented in 5G systems. However, the present disclosure is not limited to 5G systems or their associated frequency bands, and embodiments of the present disclosure may be used in conjunction with any frequency band. For example, aspects of the present disclosure may also be applied to 5G communication systems, 6G, or even higher deployments that may utilize terahertz (THz) bands.

[0036] The following Figure 1-3 Various embodiments are described that may be implemented using Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) communication techniques in a wireless communication system. Figure 1-3 The description is not meant to imply physical or architectural limitations to the manner in which different embodiments may be implemented. Different embodiments of the disclosure may be implemented in any suitably arranged communications system.

[0037] Figure 1 An example wireless network 100 is shown in accordance with an embodiment of the present disclosure. Figure 1 The embodiment of the wireless network 100 shown is for illustration only. Other embodiments of the wireless network 100 may be used without departing from the scope of the present disclosure.

[0038] like Figure 1 As shown, the wireless network includes gNB 101 (e.g., base station BS), gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130, such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.

[0039] gNB 102 provides wireless broadband access to network 130 for a first plurality of user equipment (UEs) within coverage area 120 of gNB 102. The first plurality of UEs includes UE 111, which may be located in a small business (SB); UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi hotspot (HS); UE 114, which may be located in a first residence (R); UE 115, which may be located in a second residence (R); and UE 116, which may be a mobile device (M) such as a cellular phone, wireless laptop, wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within coverage area 125 of gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of gNBs 101-103 may communicate with each other and with UEs 111-116 using 5G / NR, Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), WiMAX, WiFi, or other wireless communication technologies.

[0040] Depending on the type of network, the term "base station" or "BS" may refer to any component (or collection of components) configured to provide wireless access to a network, such as a transmission point (TP), a transmission-reception point (TRP), an enhanced base station (eNodeB or eNB), a 5G / NR base station (gNB), a macro cell, a femto cell, a WiFi access point (AP), or other wireless-enabled device. A base station may provide wireless access according to one or more wireless communication protocols, for example, 5G / NR 3GPP NR, LTE, LTE-A, High Speed ​​Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. For convenience, the terms "BS" and "TRP" are used interchangeably in this patent document to refer to a network infrastructure component that provides wireless access to a remote terminal. In addition, depending on the network type, the term "user equipment" or "UE" can refer to any component, such as a "mobile station," "subscriber station," "remote terminal," "wireless terminal," "reception point," or "user device." For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses a BS, regardless of whether the UE is a mobile device (such as a mobile phone or smartphone) or is generally considered a fixed device (such as a desktop computer or vending machine). For example, a UE can be a mobile phone, a smartphone, a monitoring device, an alarm device, a fleet management device, an asset tracking device, a car, a desktop computer, an entertainment device, an infotainment device, a vending machine, an electricity meter, a water meter, a gas meter, a security device, a sensor device, an appliance, etc.

[0041] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with gNBs, such as coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0042] As described in more detail below, one or more of UEs 111-116 include circuitry, programming, or a combination thereof for channel state information (CSI) measurement and reporting outside of an active downlink (DL) bandwidth part (BWP). In certain embodiments, one or more of gNBs 101-103 include circuitry, programming, or a combination thereof for CSI measurement and reporting outside of an active DL BWP.

[0043] although Figure 1 An example of a wireless network is shown, but Figure 1 Various changes may be made. For example, the wireless network may include any number of gNBs and any number of UEs in any suitable arrangement. Furthermore, gNB 101 may communicate directly with any number of UEs and provide these UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 may communicate directly with network 130 and provide the UEs with direct wireless broadband access to network 130. Furthermore, gNBs 101, 102, and / or 103 may provide access to other or additional external networks, such as an external telephone network or other type of data network.

[0044] Figure 2 An example gNB 102 is shown according to an embodiment of the present disclosure. Figure 2 The embodiment of gNB 102 shown is for illustration only. Figure 1 gNBs 101 and 103 may have the same or similar configurations. However, gNBs come in a variety of configurations, and Figure 2 There is no intention to limit the scope of this disclosure to any particular implementation of a gNB.

[0045] like Figure 2 As shown, gNB 102 includes multiple antennas 205a-205n, multiple RF transceivers 210a-210n, transmit (TX) processing circuitry 215, and receive (RX) processing circuitry 220. gNB 102 also includes a controller / processor 225, memory 230, and a backhaul or network interface 235.

[0046] RF transceivers 210a-210n receive incoming RF signals from antennas 205a-205n, such as signals transmitted by UEs in network 100. RF transceivers 210a-210n downconvert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are sent to RX processing circuitry 220, which filters, decodes, and / or digitizes the baseband or IF signals to generate processed baseband signals. RX processing circuitry 220 transmits the processed baseband signals to controller / processor 225 for further processing.

[0047] The TX processing circuitry 215 receives analog or digital data (such as voice data, network data, email, or interactive video game data) from the controller / processor 225. The TX processing circuitry 215 encodes, multiplexes, and / or digitizes the output baseband data to generate processed baseband or IF signals. The RF transceivers 210a-210n receive the processed baseband or IF signals output from the TX processing circuitry 215 and up-convert the baseband or IF signals into RF signals for transmission via the antennas 205a-205n.

[0048] The controller / processor 225 may include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 225 may control the reception of forward channel signals and the transmission of reverse channel signals via the RF transceivers 210a-210n, the RX processing circuitry 220, and the TX processing circuitry 215 in accordance with well-known principles. The controller / processor 225 may also support additional functionality, such as more advanced wireless communication functionality. For example, the controller / processor 225 may support assisted sensing for CSI measurements. The controller / processor 225 may support any of a variety of other functions within the gNB 102. In some embodiments, the controller / processor 225 includes at least one microprocessor or microcontroller.

[0049] The controller / processor 225 is also capable of executing programs and other processes residing in the memory 230, such as the OS. The controller / processor 225 can move data into or out of the memory 230 as required by the executing process. In some embodiments, the controller / processor 225 supports communication between entities. The controller / processor 225 can move data into or out of the memory 230 depending on the process being executed.

[0050] The controller / processor 225 is also coupled to a backhaul or network interface 235. The backhaul or network interface 235 allows the gNB 102 to communicate with other devices or systems over a backhaul connection or network. The interface 235 may support communication over any suitable wired or wireless connection(s). For example, when the gNB 102 is implemented as part of a cellular communication system (such as one that supports 5G / NR, LTE, or LTE-A), the interface 235 may allow the gNB 102 to communicate with other gNBs over a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 235 may allow the gNB 102 to communicate over a wired or wireless local area network or over a wired or wireless connection to a larger network (such as the Internet). The interface 235 includes any suitable structure that supports communication over a wired or wireless connection, such as an Ethernet or RF transceiver.

[0051] although Figure 2 An example of a gNB 102 is shown, but the Figure 2 For example, gNB 102 may include Figure 2 As a specific example, an access point may include multiple interfaces 235, and the controller / processor 225 may support routing functionality to route data between different network addresses. As another specific example, while shown as including a single instance of TX processing circuitry 215 and a single instance of RX processing circuitry 220, the gNB 102 may include multiple instances of each (such as one for each RF transceiver). In addition, Figure 2 The various components in may be combined, further subdivided, or omitted, and additional components may be added according to specific needs.

[0052] Figure 3 An example UE 116 is shown according to an embodiment of the present disclosure. Figure 3 The embodiment of UE 116 shown is for illustration only, and Figure 1 UEs 111-115 may have the same or similar configurations. However, UEs come in a variety of configurations, and Figure 3 The scope of this disclosure is not limited to any particular implementation of a UE.

[0053] like Figure 3 As shown, UE 116 includes an antenna 305, a radio frequency (RF) transceiver 310, a TX processing circuit 315, a microphone 320, and a receive (RX) processing circuit 325. UE 116 also includes a speaker 330, a controller / processor 340, an input / output (I / O) interface (IF) 345, an input device 350, a display 355, and a memory 360. Memory 360 includes an operating system (OS) 361 and one or more applications 362.

[0054] RF transceiver 310 receives an incoming RF signal from antenna 305, transmitted by a gNB of network 100. RF transceiver 310 downconverts the incoming RF signal to produce an intermediate frequency (IF) or baseband signal. The IF or baseband signal is sent to RX processing circuitry 325, which filters, decodes, and / or digitizes the baseband or IF signal to generate a processed baseband signal. RX processing circuitry 325 transmits the processed baseband signal to speaker 330 (e.g., for voice data) or processor 340 for further processing (e.g., for web browsing data).

[0055] The TX processing circuit 315 receives analog or digital voice data from the microphone 320, or receives other outgoing baseband data (such as network data, email, or interactive video game data) from the processor 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal into an RF signal, which is transmitted via the antenna 305.

[0056] The controller / processor 340 may include one or more processors or other processing devices and execute an OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the controller / processor 340 may control the reception of forward channel signals and the transmission of reverse channel signals via the RF transceiver 310, the RX processing circuitry 325, and the TX processing circuitry 315 in accordance with well-known principles. In some embodiments, the controller / processor 340 includes at least one microprocessor or microcontroller.

[0057] The controller / processor 340 is also capable of executing other processes and programs residing in the memory 360, such as processes for beam management. The controller / processor 340 can move data into or out of the memory 360 as needed for the executed processes. In some embodiments, the processor 340 is configured to execute applications 362 based on the OS 361 or in response to signals received from the gNB or operator. The controller / processor 340 is also coupled to the I / O interface 345, which provides the UE 116 with the ability to connect to other devices, such as laptops and handheld computers. The I / O interface 345 is the communication path between these accessories and the processor 340.

[0058] The controller / processor 340 is also coupled to an input device 350 and a display 355. An operator of the UE 116 can use the input device 350 to input data into the UE 116. The input device 350 can be a keyboard, a touch screen, a mouse, a trackball, a voice input, or other device capable of serving as a user interface to allow the user to interact with the UE 116. In another example, the input device 350 can include a touch panel, a (digital) pen sensor, a keypad, or an ultrasonic input device. The touch panel can recognize touch input in at least one scheme, such as a capacitive scheme, a pressure-sensitive scheme, an infrared scheme, or an ultrasonic scheme.

[0059] Controller / processor 340 is also coupled to a display 355. Display 355 may be a liquid crystal display, a light emitting diode display, or other display capable of presenting text and / or at least limited graphics (such as from a website).

[0060] Memory 360 is coupled to processor 340. A portion of memory 360 may include random access memory (RAM), while another portion of memory 360 may include flash memory or other read-only memory (ROM).

[0061] although Figure 3 An example of a UE 116 is shown, but the Figure 3 Make various changes. For example, Figure 3 The various components in the can be combined, further subdivided, or omitted, and additional components can be added as needed. As a specific example, the controller / processor 340 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). In addition, although Figure 3 The UE 116 is shown configured as a mobile phone or smartphone, but the UE may be configured to operate as other types of mobile or stationary devices.

[0062] Embodiments of the present disclosure take into account that NR Release 16 (Rel-16) supports channel state information (CSI) measurement and reporting of active downlink (DL) bandwidth parts (BWPs). However, when a UE is triggered with a CSI report of an inactive DL BWP, the UE is not expected to report CSI for the inactive DL BWP, and the CSI report associated with that BWP is omitted. Similarly, when a UE is triggered with an aperiodic non-zero power (NZP) channel state information reference signal (CSI-RS) in an inactive DL BWP when receiving the NZP CSI-RS, the UE is not expected to measure the aperiodic CSI-RS. For example, in order to obtain CSI across the entire carrier bandwidth, the UE can be switched to a BWP with a large bandwidth and triggered with an aperiodic CSI report of the BWP. However, this approach is not suitable for devices with limited operating bandwidth. Therefore, embodiments of the present disclosure take into account the need to at least support CSI measurement and reporting of inactive DL BWPs for UEs with limited operating bandwidth.

[0063] For UEs with reduced operating bandwidth, if CSI for all configured DL BWPs (including active and inactive BWPs) is available on the network (NW) side, the NW can switch the UE to the best BWP or narrowband for data reception. This can improve channel efficiency. When a cell serves a large number of UEs with limited UE operating bandwidth, obtaining CSI outside the active BWP is also beneficial for congestion control. If CSI across the entire carrier bandwidth is available on the NW side, the NW can assign the UE to the active DL BWP based on the real-time channel conditions on the UE side.

[0064] Embodiments of the present disclosure also take into account that NR Release 15 (Rel-15) supports radio resource management (RRM) measurements for mobility in the RRC_CONNECTED state during measurement gaps outside of an active DL BWP. Measurement gaps for RRM measurements are configured per frequency range or per UE. Embodiments of the present disclosure also take into account that Rel-16 also supports measurement gaps for intra-frequency positioning reference signal (PRS) measurements outside of an active BWP. However, measurement gaps are supported for receiving DL RS in a configuration independent of the BWP configuration. If the timing of the measurement gaps and the DL RS from multiple DL BWPs are not aligned, pre-configured measurement gaps from higher layers may be inefficient.

[0065] Since NR supports a one-to-one mapping between CSI reports and resourcesForChannelMeasurement (per BWP), multiple CSI reports are required to complete reporting of all CSI from multiple BWPs. Embodiments of the present disclosure consider CSI reporting of multiple DL BWPs to reduce signaling overhead and increase power savings.

[0066] Therefore, embodiments of the present disclosure support periodic measurement gaps for each serving cell for CSI measurement outside of active DL BWPs, and corresponding CSI reporting. Embodiments of the present disclosure also support aperiodic CSI reporting of one or more DL BWPs that have DL RSs for channel measurement received by the UE within predetermined aperiodic measurement gaps. Embodiments of the present disclosure also support CSI measurement in dormant DL BWPs triggered by physical layer signals / channels based on BWP switching to avoid additional RF retuning. In addition, embodiments of the present disclosure support aperiodic CSI measurement or reporting of multiple DL BWPs triggered by DCI formats monitored centrally in a common search space.

[0067] Embodiments of the present disclosure consider how to support CSI measurement and reporting of inactive DL BWPs based on higher-layer measurement gaps. Embodiments of the present disclosure also consider how to support CSI measurement and reporting of inactive DL BWPs based on aperiodic measurement gaps triggered by physical layer signals / channels. Embodiments of the present disclosure also consider how to support CSI measurement and reporting of dormant DL BWPs triggered by physical layer signals / channels. In addition, embodiments of the present disclosure consider how to support cell-specific aperiodic CSI-RS resources and CSI reporting of one or more DL BWPs triggered by a new DCI format centrally monitored in the common search space.

[0068] Embodiments of the present disclosure relate to determining periodic measurement gaps for CSI measurements and reporting outside of active DL BWPs. The present disclosure also relates to determining aperiodic CSI reporting for one or more DL BWPs that have DL RSs received by a UE for channel measurement within predetermined aperiodic measurement gaps. The present disclosure also relates to determining CSI measurements in dormant DL BWPs triggered by physical layer signals / channels. The present disclosure also relates to determining cell-specific aperiodic CSI-RS resources and CSI reporting for one or more DL BWPs triggered by a new DCI format monitored in a common search space set.

[0069] Periodic CSI measurement gap for each serving cell

[0070] Embodiments of the present disclosure contemplate periodic measurement gaps for channel measurements on one or more DL BWPs on a serving cell. In some embodiments, one or more DL BWPs are inactive. In other embodiments, one or more DL BWPs may be active or inactive. For a configured serving cell, a UE (such as Figure 1 and 3The UE 116 is provided with a measurement gap for receiving a DL reference signal (RS). The DL RS is used for channel measurement of one or more DL BWPs on the serving cell. In this disclosure, the measurement gap is denoted as MG_CM. The configuration of the MG_CM can be provided to the UE through higher layer signaling.

[0071] Figure 4 An example timeline 400 of aperiodic CSI reporting for four DL BWPs according to an embodiment of the disclosure is shown. Figure 4 The example timeline 400 is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0072] Figure 4 An example timeline 400 illustrates an example measurement gap configuration for receiving DL RS for channel measurements across all configured DL BWPs (including active and inactive DL BWPs). In certain embodiments, the MG_CM configuration includes a measurement gap length 402, denoted as mgl. The measurement gap length 402 represents the duration or length of the measurement gap in units of one millisecond or one time slot.

[0073] In certain embodiments, the MG_CM configuration includes a measurement gap repetition period 401, denoted as mgrp. The measurement gap repetition period 401 indicates the periodicity of measurement gap repetition in units of one millisecond or one time slot.

[0074] In some embodiments, the MG_CM configuration includes a measurement gap offset, denoted as gapOffset. The measurement gap offset can be in milliseconds or slots. The measurement gap offset is the gap offset of the gap pattern within the measurement gap repetition period determined by mrgp. The value of gapOffset ranges from 0 to mgrp-1.

[0075] In some embodiments, the MG_CM configuration is activated or deactivated based on signaling from higher layers. For example, for a UE that includes the MG_CM configuration, the UE may determine the single frequency network (SFN) of the MG_CM, i.e., SFN_MG, and the subframe of the MG_CM, i.e., sf_MG, as described in the following equation (1):

[0076]

[0077] In order to allow channel measurement and CSI calculation based on measurement gaps, a timeline requirement of X1 (404) or X2 (406) may be provided to the UE. The UE expects the timeline to meet the requirements limited by either X1 or X2. Note that X1 is the minimum time offset between the last symbol of the DL RS from BWP_i and the first symbol of the DL RS from BWP_j, where the UE performs CSI measurement based on the DL RS of BWP_j after completing the CSI measurement based on the DL RS of BWP_i. X2 is the minimum time offset between the last symbol of the DL BWP in which the UE is instructed to perform CSI measurement and the first symbol 405 of the PUCCH / PUSCH carrying the CSI report of the DL BWP.

[0078] To determine the applicable resources for channel measurement within the MG_CM of the serving cell, resource 403 may be an NZP CSI-RS or synchronization signal physical broadcast channel (SS / PBCH) block transmitted from the serving cell. For example, the applicable resources for channel measurement within the MG_CM may be a CSI-RS or SS / PBCH block configured by the higher-layer parameter CSI-ResourceConfig. If the UE is configured with the higher-layer parameter CSI-ResourceConfig, the UE may perform channel measurement based on the CSI-ResourceConfig during the MG_CM. The UE may receive resources in the configured DL BWP based on the higher-layer parameter bwp-Id. Based on the higher-layer parameter resourceType, the resources may be periodic, semi-persistent, or aperiodic.

[0079] As another example, the applicable resource for channel measurement within MG_CM may be NZP CSI-RS and configured by the higher-layer parameter NZP-CSI-RS-ResourceSet in the absence of the higher-layer parameter trs-Info or when the higher-layer parameter trs-Info is set to "false." If the UE is configured with the higher-layer parameter NZP-CSI-RS-ResourceSet, the UE may perform channel measurement based on the NZP-CSI-RS-ResourceSet during MG_CM. The UE may receive resources in a configured DL BWP associated with the NZP-CSI-RS-ResourceSet.

[0080] To utilize channel measurements within the MG_CM to determine CSI reporting, if CSI is measured based on resources received in a DL BWP within the MG_CM, the UE can report CSI for the DL BWP (e.g., in an uplink channel 405 such as PUCCH or PUSCH) regardless of whether the DL BWP is active. In a first approach to ensure sufficient CSI calculation time, if a valid measurement opportunity exists for receiving the resource, the UE measures the resource and transmits a CSI report. Alternatively, if no valid measurement opportunity exists for receiving the resource, the UE skips receiving the resource and ignores the CSI report. If the time gap between the most recent measurement opportunity within the MG_CM for receiving the resource associated with the CSI report and the previous valid measurement opportunity associated with another CSI report for a different DL BWP is greater than T0, the UE can determine that a valid measurement opportunity exists for CSI reporting for the DL BWP within the MG_CM. In one example, T0 can be the BWP switching delay reported by the UE. In another example, T0 can be reported by the UE as a UE capability.

[0081] In the second method for ensuring sufficient CSI calculation time, a Z0 timeline requirement can be provided to the UE. The Z0 timeline requirement is the minimum time offset between the last symbol of the DL RS from BWP_i and the first symbol of the DL RS from BWP_j, where the UE performs CSI measurement based on the DL RS of BWP_j after completing the CSI measurement based on the DL RS of BWP_i. To determine Z0, the UE can report its Z0 capability to the network. The unit of Z0 can be one time slot, one OFDM symbol, or one millisecond. The UE can expect the timeline for CSI measurement within the MG_CM to meet the timeline requirement defined by Z0.

[0082] The following three examples describe CSI reporting using channel measurement within MG_CM. For example, if the UE is provided with the configuration of MG_CM and the higher-layer parameter CSI-ReportConfig, where reportConfigType is set to "periodic", "semiPersistentOnPUCCH", or "semi-PersistentOnPUSCH", then when the UE receives resources for channel measurement based on the higher-layer parameter resourcesForChannelMeasurement within MG_CM, the UE reports CSI in the Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) based on the CSI-ReportConfig of the configured BWP. The configured DL BWP may be an inactive DL BWP.

[0083] For another example, if the UE is provided with a configuration of MG_CM, when the UE is triggered with CSI reporting of an inactive DL BWP when it is expected to receive the associated NZP CSI-RS no later than the latest opportunity of the CSI reference resource during MG_CM, the UE is expected to report the CSI of the inactive DL BWP. When the UE is triggered with aperiodic NZP CSI-RS in the inactive DL BWP when it is expected to receive NZP CSI-RS within MG_CM, the UE is expected to measure the aperiodic CSI-RS.

[0084] For yet another example, the CSI report is a L1-RSRP (reference signal received power) report of the configured DL BWP, regardless of whether the BWP is active or inactive. If the UE is provided with a configuration of an MG_CM and a higher layer parameter CSI-ReportConfig, where reportQuantity is set to "cri-RSRP", "cri-SINR" or "None", then when the UE receives resources for channel measurement based on the higher layer parameter resourcesForChannelMeasurement in the MG_CM, the UE reports CSI in the PUCCH or PUSCH based on the CSI-ReportConfig of the configured BWP.

[0085] Figure 5 An example method 500 of a UE process for channel state information (CSI) measurement and reporting according to an embodiment of the present disclosure is shown. For example, the steps of the method 500 may be performed by Figure 1 Any one of the UEs 111-116 may execute, for example Figure 3 UE116. Figure 5 The method 500 is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0086] like Figure 5 As shown, method 500 describes an example UE procedure for CSI measurement and reporting of inactive DL BWPs based on pre-configured measurement gaps. In step 502, a measurement gap configuration is provided to the UE from higher layers. In step 504, the UE determines the measurement gap based on the configuration. In step 506, the UE performs channel measurements on the pre-configured DL RS for one or more DL BWPs within the measurement gap. In step 508, the UE is configured to send CSI reports for the inactive DL BWPs.

[0087] In step 510, the UE determines whether it receives at least one DL RS within the measurement gap before the CSI reference resource corresponds to the CSI report. In step 512, when the UE receives at least one DL RS within the measurement gap before the CSI reference resource corresponds to the CSI report, the UE sends the CSI report. Alternatively, in step 514, if the UE does not receive at least one DL RS within the measurement gap before the CSI reference resource corresponds to the CSI report, the UE discards the CSI report.

[0088] To determine the UE procedure for Physical Downlink Control Channel (PDCCH) reception in an active DL BWP within an MG_CM, the UE does not expect to monitor or receive PDCCH in the active DL BWP within the MG_CM. Similarly, to determine the UE procedure for Physical Downlink Shared Channel (PDSCH) reception in an active DL BWP within an MG_CM, the UE does not expect to receive PDSCH in the active DL BWP within the MG_CM.

[0089] In certain embodiments, when a UE is provided with both a configuration of an MG_CM and another type of measurement gap (such as a measurement gap for RRM measurement or PRS reception), to avoid collisions, the UE may assume that there is no overlap between the MG_CM and the other type of measurement gap. Similarly, if a UE is provided with a configuration of an MG_CM and another type of measurement gap (such as a measurement gap for RRM measurement or PRS reception), to avoid collisions, the UE may skip the MG_CM when the MG_CM overlaps with the other type of measurement gap.

[0090] In some embodiments, the UE receives a MAC CE to indicate activation or deactivation of an MG_CM for CSI-RS resource reception and CSI reporting amount determination. In one example, the MAC CE indicates activation of one or more MG_CMs with a configuration provided by a higher layer. In another example, the MAC CE indicates deactivation of one or more MG_CMs. In response to receiving the MAC CE, the UE applies the activation or deactivation command after sending a HARQ-ACK.

[0091] although Figure 5 Method 500 is shown, but may be Figure 5 Make various changes. For example, although Figure 5 The method 500 is shown as a series of steps, but the individual steps can overlap, occur in parallel, occur in a different order, or occur multiple times. In another example, a step can be omitted or replaced by another step. For example, the steps of the method 500 can be performed in a different order.

[0092] Aperiodic measurement gap for each aperiodic CSI report

[0093] Embodiments of the present disclosure also contemplate and describe aperiodic CSI reporting by one or more DL BWPs, which have resources for channel measurement received by the UE during a predetermined aperiodic measurement gap. This measurement gap is referred to as MG2_CM. In one example, the one or more DL BWPs are inactive. In another example, the one or more DL BWPs may be either active or inactive.

[0094] For aperiodic CSI reporting, the UE may be triggered to send a CSI report in the PUSCH based on an indication received from a physical layer signal / channel, such as a field in the DCI format. The indication indicates one of the pre-configured trigger states. Higher layers may provide one or more trigger states to the UE. The trigger state may include a list of CSI report configurations. Each CSI report configuration is mapped to a CSI resource configuration of resources for channel measurement, denoted as resourcesForChannelMeasurement. Each resourcesForChannelMeasurement may be associated with a configured DL BWP. The UE may expect DL BWPs associated with different resourcesForChannelMeasurement to be configured for different DL BWPs from the same serving cell. Additionally or alternatively, the trigger state may include MG2_CM, where MG2_CM indicates the duration for receiving resources for channel measurement from N≥1 DL BWPs.

[0095] In certain embodiments, when a UE receives a physical layer signal / channel indicating a triggered state, the UE also receives a DL RS for channel measurement within the MG2_CM indicated by the triggered state. The UE does not intend to measure two consecutive measurement opportunities within the MG2_CM to receive resources for channel measurement from two DL BWPs, where the time offset between the two measurement opportunities is greater than a predetermined time interval T1. In one example, T1 may be the BWP switching delay reported by the UE. In another example, T1 is reported by the UE as a UE capability. The UE does not intend to monitor the PDCCH or receive any DL channels / signals other than the indicated DL RS within the MG2_CM.

[0096] To ensure sufficient CSI computation time, the UE may be provided with a timeline requirement of Y1, Y2, or Y3. The UE can expect that the timeline for aperiodic CSI reporting for multiple DL BWPs will meet the timeline requirement defined by any of Y1, Y2, or Y3. Note that Y1 is the minimum time offset between the last symbol of the PDCCH triggering the aperiodic CSI report and the first symbol of the DL RS in the first DL BWP in which the UE is instructed to perform CSI measurement. Also note that Y2 is the minimum time offset between the last symbol of the DL RS from BWP_i and the first symbol of the DL RS from BWP_j, where the UE performs CSI measurement based on the DL RS of BWP_j after completing CSI measurement based on the DL RS of BWP_i. Y3 is the minimum time offset between the last symbol of the last DL BWP in which the UE is instructed to perform CSI measurement and the first symbol of the PUCCH / PUSCH carrying CSI reports for multiple DL BWPs. To determine whether to use Y1 or Y2, the UE may report its capability for either Y1 or Y2 to the network. In some embodiments, the unit of Y1 or Y2 may be a time slot, an OFDM symbol, or a millisecond.

[0097] Figure 6 An example timeline 600 is shown for aperiodic CSI reporting for four DL BWPs (DL BWPs #0 to #3) according to an embodiment of the disclosure. Figure 6 The example timeline 600 is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0098] Figure 6 Example timeline 600 shows an example of a timeline for aperiodic CSI reporting for four DL BWPs based on MG2_CM. The UE can expect 601 to be no less than Y1, 602 to be no less than Y2, and 603 to be no less than Y3. In certain embodiments, after receiving all DL RS resources, the UE generates CSI based on the CSI report configuration list indicated by the trigger status and sends a CSI report.

[0099] In certain embodiments, the aperiodic CSI for one or more DL BWPs may include a reporting quantity for each DL BWP based on a CSI reporting configuration list, or a reporting quantity for a DL BWP having the best channel quality among all applicable DL BWPs.

[0100] To determine the content of aperiodic CSI reporting for multiple DL BWPs, the CSI report may include the CSI for each of the multiple DL BWPs. Here, the CSI is determined based on a list of CSI reporting configurations. Alternatively, to determine the content of aperiodic CSI reporting for multiple DL BWPs, the CSI report may include the CSI for the DL BWP with the best channel quality among the multiple DL BWPs. For example, if the reporting quantity for each CSI reporting configuration is L1 RSRP, the UE's CSI report may include the highest L1 RSRP and an index indicating the associated CSI reporting configuration for the associated DL BWP. The reporting quantity may also be a channel quality indicator (CQI) or a signal-to-interference-plus-noise ratio (SINR).

[0101] Figure 7 An example method 700 of a UE process for aperiodic CSI reporting of one or more DL BWPs according to an embodiment of the present disclosure is shown. For example, the steps of the method 700 may be performed by Figure 1 Any one of the UEs 111-116 may execute, for example Figure 3 UE116. Figure 7 The method 700 is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0102] In step 702, higher layers provide one or more triggering states to the UE. In step 704, the UE receives a DCI format indicating a triggering state. In step 706, the UE performs channel measurements on the DL RSs of one or more DL BWPs as indicated by the triggering state. In step 708, the UE sends a CSI report based on the triggering state.

[0103] It is also possible that the UE receives a MAC CE to indicate a triggering status for CSI-RS resource reception / measurement of one or more DL BWPs and one or more CSI reports based on the CSI-RS resource reception.

[0104] although Figure 7 Method 700 is shown, but may be Figure 7 Make various changes. For example, although Figure 7 The method 700 is shown as a series of steps, but the individual steps can overlap, occur in parallel, occur in a different order, or occur multiple times. In another example, a step can be omitted or replaced by another step. For example, the steps of the method 700 can be performed in a different order.

[0105] CSI measurement in dormant DL BWP

[0106] As described above, embodiments of the present disclosure consider and describe CSI measurements in a dormant DL BWP triggered by a physical layer signal / channel. When a UE receives an indication for CSI measurement in a dormant DL BWP, the UE receives periodic or semi-persistent reference resources for CSI measurement based on higher-layer parameters. For example, within a given time period, the UE does not monitor the PDCCH or receive the PDSCH in the dormant DL BWP relative to the CSI-ResourceConfig in the dormant DL BWP. This given time period is referred to as a CSI measurement gap.

[0107] To determine the CSI measurement gap for dormant DL BWP from the serving cell, N may be provided to the UE for each configured DL BWP on the serving cell. MG A list of ≥1 CSI measurement gaps, where each CSI measurement gap can be a unit of one millisecond or one time slot. The list of CSI measurement gaps can be provided to the UE via higher layer signaling. The UE is configured to receive a physical layer signal / channel, where the physical layer signal / channel carries bit size CSI measurement gap indication, and The value of may indicate the (v+1)th CSI measurement gap in the measurement gap list of the dormant DL BWP.

[0108] In one example, the physical layer signal / channel may be a DCI format, such as 1_1, with a CRC scrambled by a C-RNTI. If all bits of the frequency domain resource allocation are set to 0 for resource allocation type 0, or all bits of the frequency domain resource allocation are set to 1 for resource allocation type 1, any of the subsequent fields of DCI format 1_1 may be reused as a CSI measurement gap indication. For example, the field may be (i) time domain resource allocation, (ii) carrier indicator, (iii) modulation and coding scheme for transport block 1, (iv) new data indicator for transport block 1, (v) redundancy version for transport block 1, (vi) hybrid automatic repeat request (HARQ) process number, (vii) antenna port(s), or (viii) any combination thereof.

[0109] In another example, the physical layer signal / channel may be a DCI format that is centrally monitored by the UE in a common search space (CSS). In the configuration of the DCI format provided by a higher layer, the starting position of the CSI measurement gap indication, or the payload size of the DCI format may be provided to the UE.

[0110] When no CSI measurement gap is configured for a configured DL BWP, a default CSI measurement gap may be used for the DL BWP. For example, the default CSI measurement gap may be the BWP-InactivityTimer of the default DL BWP. As another example, the default CSI measurement gap is defined in the system operating specifications and may be any one of 2 ms, 3 ms, 4 ms, 5 ms, 6 ms, 8 ms, 10 ms, 20 ms, 30 ms, 40 ms, 50 ms, 60 ms, 80 ms, 100 ms, 200 ms, 300 ms, 500 ms, 750 ms, etc.

[0111] In certain embodiments, to determine the dormant DL BWP, the ID of the dormant DL BWP may be indicated by a physical layer signal / channel. For example, the physical layer signal / channel may be a DCI format 1_1 with a CRC scrambled by a C-RNTI, and when all bits of the frequency domain resource allocation are set to 0 for resource allocation type 0 or set to 1 for resource allocation type 1, the dormant BWP is indicated by the bandwidth part indicator of the DCI format 1_1.

[0112] For another example, the physical layer signal / channel may be a DCI format that is centrally monitored by the UE in a common search space (CSS). The DCI format includes one or more blocks, and the UE is configured to retrieve information from a block. The starting position of a block and the payload size of the DCI format may be provided to the UE via UE-specific RRC signaling. A block may include a bandwidth part indicator that indicates a dormant DL BWP. Additionally or alternatively, if the UE is configured with a CSI measurement gap list for a dormant DL BWP, a block may include a CSI measurement gap indication that indicates a CSI measurement gap from the CSI measurement gap list in the dormant DL BWP.

[0113] Figure 8 An example method 800 of a UE process for CSI measurement according to an embodiment of the present disclosure is shown. For example, the steps of method 700 may be performed by Figure 1 Any one of the UEs 111-116 may execute, for example Figure 3 UE116. Figure 8 The method 800 is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0114] like Figure 8As shown, method 800 shows an example of a UE process for CSI measurement in a dormant DL BWP triggered by a DCI format. In step 802, a CSI measurement gap list is configured for the UE for each DL BWP on the serving cell. In step 804, the UE receives a PDCCH in an active DL BWP (denoted as BWP_a), and the PDCCH includes a DCI format indicating a CSI measurement gap for a dormant DL BWP (denoted as BWP_d).

[0115] In step 806, the UE determines whether the dormant DL BWP is the current active DL BWP. When the UE determines that the dormant DL BWP is not the current active DL BWP, in step 808, the UE switches to the dormant DL BWP. In step 810, if the UE is instructed to switch BWPs (step 808), the UE starts a timer with the indicated initial time value of the CSI measurement gap when performing the BWP switch; otherwise, the UE starts a timer with the indicated initial time value of the CSI measurement gap in the next time slot after the time slot in which the UE receives the DCI format.

[0116] In step 812, if the timer has not expired, the UE measures CSI based on the DL RS received in the dormant DL BWP. In step 812, the UE also decrements the timer at the end of a subframe in FR1 or at the end of a half subframe in FR2. In step 814, the UE determines whether the timer has expired. If the UE determines that the timer has expired, in step 816, the UE switches back to the previous active DL BWP (BWP_a). In step 818, the UE monitors the PDCCH and receives the PDSCH in the active DL BWP.

[0117] In certain embodiments, if the timer associated with the CSI measurement gap is running and has not expired, the UE assumes that the DL BWP is a dormant DL BWP. The UE does not receive PDSCH or monitor PDCCH in the dormant DL BWP. The UE can receive DL RS, such as CSI-RS or SS / PBCH blocks (if configured), and measure CSI based on the RS received in the dormant DL BWP.

[0118] although Figure 8 Method 800 is shown, but may be Figure 8 Make various changes. For example, although Figure 8 The method 800 is shown as a series of steps, but the steps can overlap, occur in parallel, occur in a different order, or occur multiple times. In another example, a step can be omitted or replaced by another step. For example, the steps of method 700 can be performed in a different order.

[0119] Figure 9 An example timeline 900 for CSI measurement according to an embodiment of the disclosure is shown. Figure 9 The example timeline 900 is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0120] Example timeline 900 shows CSI measurements in dormant DL BWPs triggered by DCI formats. Figure 9 As shown, the UE monitors the PDCCH in the active DL BWP (BWP_a). The UE receives a PDCCH including a DCI format (901), wherein the DCI format indicates a CSI measurement gap for a dormant DL BWP (BWP_d). After receiving the PDCCH including the DCI format (901), the UE switches to the dormant DL BWP (BWP_d) during time 902 within the BWP switching delay. During time 904, the UE receives a DL RS (903) in the dormant DL BWP and performs CSI measurement based on the received DL RS during the indicated CSI measurement gap. During time 905, when a timer associated with the measurement gap expires, the UE switches back to the previous active DL BWP within the BWP switching delay.

[0121] In some embodiments, it is possible to Figure 1 UE 116 is provided with a predetermined BWP switching delay X, which can be in units of one time slot or one millisecond. When the UE receives a physical layer signal / channel instructing a switch from an active DL BWP to a dormant DL BWP for CSI measurement, the UE completes the switch within the BWP switching delay X. The BWP switching delay starts at the time slot in which the UE receives the physical layer signal / channel. The UE is not required to receive DL signals on the cell to which the BWP is switched.

[0122] In some embodiments, it is possible to Figure 1 UE 116 is provided with a predetermined BWP switching delay Y, which can be in units of one time slot or one millisecond. When the UE is triggered to switch from a dormant DL BWP to an active DL BWP upon expiration of a timer associated with a CSI measurement gap, the UE completes the switch within the BWP switching delay Y. The start time of the BWP switching delay is the time slot at the beginning of the subframe (FR1) or half subframe (FR2) immediately following the expiration of the timer. The UE is not required to receive DL signals on the cell to which the BWP is switched.

[0123] In a first method for determining X or Y, X or Y may be a Type 1 or Type 2 BWP switching delay. Alternatively, X or Y may be different types of BWP switching delays. For example, the values ​​of X or Y may be 1 for a 15 kHz subcarrier spacing (SCS), 1 for a 30 kHz SCS, 1 for a 60 kHz SCS, and 2 for a 120 kHz SCS, respectively. If the BWP switching involves a change in SCS, the BWP switching delay is determined by the larger of the SCS before and after the BWP switching.

[0124] In some embodiments, if a UE (such as Figure 1 If a UE 116) performs CSI measurement during a measurement time gap in a dormant DL BWP, the UE may send a CSI report. Note that the DL RS used for CSI measurement corresponds to the CSI report received by the UE during the indicated measurement time gap.

[0125] Figure 10 An example method 1000 of a UE process for periodic or semi-persistent CSI reporting according to an embodiment of the present disclosure is shown. For example, the steps of method 700 may be performed by Figure 1 Any one of the UEs 111-116 may execute, for example Figure 3 UE116. Figure 10 The method 1000 is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0126] In step 1002, the UE is triggered to perform CSI measurements in the dormant DL BWP. In step 1004, the UE is configured to send periodic or semi-persistent CSI reports. In step 1006, the UE determines whether it receives at least one DL RS in the dormant DL BWP before the CSI reference resource corresponds to the CSI report. If the UE receives at least one DL RS transmission opportunity for CSI measurement no later than the CSI reference resource during the indicated measurement gap, then in step 1010, the UE sends a CSI report in the active DL BWP 1004. If the UE does not receive at least one DL RS transmission before the CSI reference resource corresponds to the CSI report, then in step 1008, the UE discards the report.

[0127] In certain embodiments, when CSI measurement in a dormant BWP is enabled, when the DL BWP is a dormant BWP or in a valid DL slot (when the DL BWP is an active DL BWP), the UE reports a CSI report for the DL BWP when at least one CSI-RS transmission opportunity and CSI-RS for channel measurement and / or a CSI-IM opportunity for interference measurement is received no later than the CSI reference resource during the indicated measurement gap, otherwise the report is discarded. When more than one CSI measurement opportunity occurs, the UE reports the CSI derived from the most recent CSI measurement opportunity.

[0128] The UE may also receive a MAC CE to indicate a dormant BWP, which is used for CSI-RS resource reception / measurement or one or more CSI reports based on CSI-RS resource reception / measurement.

[0129] although Figure 10 Method 1000 is shown, but may be Figure 10 Make various changes. For example, although Figure 10 The method 1000 is shown as a series of steps, but the individual steps may overlap, occur in parallel, occur in a different order, or occur multiple times. In another example, a step may be omitted or replaced by another step. For example, the steps of the method 1000 may be performed in a different order.

[0130] Aperiodic CSI measurement / reporting of multiple BWPs triggered by group common PDCCH

[0131] As described above, embodiments of the present disclosure consider and describe aperiodic CSI measurement or reporting of N>1 DL BWPs triggered by a DCI format monitored in a common search space set. The DCI format is referred to as DCI format 3.

[0132] In order to determine the aperiodic DL RS for CSI measurement across N1>1 DL BWPs, N1 CSI resource configurations may be provided to a UE (such as UE 116). Each resource configuration may be denoted as CSI-ResourceConfig. These configurations may be part of system information and received by the UE in a PDSCH scheduled by a DCI format with a CRC scrambled by the SI-RNTI. The CSI-ResourceConfig may include a CSI-ResourceConfig ID. The CSI-ResourceConfig may include a DL BWP indicator. The DL BWP indicator indicates the DL BWP in which the aperiodic CSI-RS resources defined by the CSI-ResourceConfig are transmitted. Note that the UE does not expect to receive different CSI-ResourceConfigs with the same DL BWP indicator. The CSI-ResourceConfig may include N2≥1 CSI-RS resource sets, where each CSI-RS resource set (denoted as csi-RS-ResourceSet) defines a list of non-zero power (NZP) CSI-RS resources. The resource type of the NZP CSI-RS resources is predetermined to be aperiodic.

[0133] In some embodiments, the csi-RS-ResourceSet may include an ID. In some embodiments, the csi-RS-ResourceSet may include a list of NZP CSI-RS resources, where each NZP CSI-RS resource may be determined based on a higher layer parameter NZP-CSI-RS-Resource. In some embodiments, the csi-RS-ResourceSet may include an aperiodic trigger offset, denoted as X. offset When the DL BWP receiving the CSI-RS resource set is the first DL BWP for aperiodic CSI measurement triggered by DCI format 3, X offset Indicates the slot offset between the slot containing the DCI that triggers the aperiodic CSI measurement and the first slot in which the CSI-RS resource set is transmitted. Otherwise, Xoffset indicates the slot offset between the last slot in which the CSI-RS resource set from the previous DL BWP was transmitted and the slot in which the CSI-RS resource set is transmitted. Note that the UE is not expected to be configured with an aperiodic trigger offset that is smaller than the BWP switching delay reported by the UE.

[0134] To trigger aperiodic CSI measurements across multiple DL BWPs, a CSI measurement may be sent to a controller such as Figure 1The UE 116 of the embodiment of the present invention provides a configuration of DCI format 3 to be monitored in the common search space set. The configuration may include a list of K CSI-ResourceConfig IDs. DCI format 3 includes K consecutive A-CSI-RS triggering fields, where the kth (k=1, .., K) A-CSI-RS triggering field is associated with the CSI-ResourceConfig indicated by the kth CSI-ResourceConfig configuration ID. The value v of the kth A-CSI-RS triggering field is k Indicates the (v)th CSI-ResourceConfig from the CSI-ResourceConfig indicated by the kth CSI-ResourceConfig ID k +1) CSI-RS-ResourceSets. The value of K is equal to the number of CSI-ResourceConfigs, N1. This configuration is provided to the UE via higher layer signaling. For example, this configuration can be part of system information and received by the UE in a PDSCH scheduled using a DCI format with a CRC scrambled by the SI-RNTI. For another example, the configuration is provided to the UE via UE-specific RRC signaling.

[0135] Figure 11 An example method 1100 of a UE process for aperiodic CSI measurement according to an embodiment of the present disclosure is shown. For example, the steps of method 700 may be performed by Figure 1 Any one of the UEs 111-116 may execute, for example Figure 3 UE116. Figure 11 The method 1100 is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0136] like Figure 11 As shown, method 1100 shows an example of a UE process for aperiodic CSI measurement across multiple BWPs triggered by a DCI format. In step 1102, a UE sends a CSI signal to a user device such as Figure 1 UE 116 of the present invention provides a configuration of DCI format 3 and multiple CSI resource configurations. For example, the number of CSI resource configurations may be more than one. In step 1104, the UE monitors DCI format 3 in the CSS set. In step 1106, the UE receives DCI format 3 including K>1 A-CSI-RS triggering fields. In step 1108, the UE then performs CSI measurement on K>1 DL BWPs in ascending order of A-CSI-RS triggering field indices. The channel measurement of the kth DL BWP is based on the aperiodic CSI-RS resource indicated by the kth A-CSI-RS triggering field.

[0137] In certain embodiments, when a UE such as UE 116 is triggered to perform CSI measurements across multiple DL BWPs, the UE does not expect to transmit any UL signals / channels nor receive other DL channels / signals except for the indicated aperiodic CSI-RS resources.

[0138] In certain embodiments, when a UE (such as UE 116) completes CSI measurements across multiple DL BWPs, the UE may switch to a predetermined DL BWP. For example, the predetermined DL BWP is a default DL BWP preconfigured by higher layers. For another example, based on the CSI measurements, the predetermined DL BWP is the DL BWP with the best channel quality. In this case, the UE reports the ID of the DL BWP with the best channel quality to the gNB. For error handling, if the UE does not receive any DL channel / signal for a duration after switching to the DL BWP with the best channel quality, the UE switches back to the default DL BWP. The duration may be predefined in the system operating specifications (such as a 5 ms duration) or provided to the UE via higher layer signaling.

[0139] For aperiodic CSI reporting of multiple DL BWPs, one or more CSI reporting configurations may be provided to a UE (such as UE 116) for CSI reporting of multiple DL BWPs. The CSI reporting configuration, denoted as CSI-ReportConfig, may include an ID denoted as reportConfigID. The CSI reporting configuration may include ReportSlotOffset to indicate the timeslot offset between the timeslot containing the DCI that triggers the CSI report and the timeslot in which the UE sends the CSI report. The CSI reporting configuration may include a reporting quantity denoted as reportQuantity. If reportQuantity is not configured, the UE may assume a default reporting quantity, such as cri-RSRP. For example, reportQuantity may be configured as a channel quality indicator (CQI), or a signal-to-interference plus noise ratio (SINR), or a reference signal received power (RSRP). The CSI reporting configuration may include PUCCH-CSI-Resource to indicate the configuration of the PUCCH for sending the CSI report. The CSI reporting configuration may include reportFreqConfiguration to define the frequency domain configuration of the CSI report. The CSI reporting configuration may include a PUSCH-CSI-Resource, which indicates the configuration of the PUSCH on which the CSI report is transmitted. Note that one or more CSI reporting configurations may be provided to the UE via higher layer signaling (such as UE-specific RRC signaling).

[0140] In certain embodiments, to trigger aperiodic CSI reporting for multiple DL BWPs, a configuration of DCI format 3 monitored in a common search space set is provided to a UE, such as UE 116. The DCI format includes N≥1 blocks. The UE may be configured to retrieve information from one of the N≥1 blocks. A starting position of a block and a payload size of the DCI format may be provided to the UE via UE-specific RRC signaling. A block may include a CSI request indicator. The CSI request indicator indicates one of the preconfigured CSI reporting configurations. A block may include a report slot offset, denoted as ReportSlotOffset. The report slot offset ReportSlotOffset indicates a slot offset between a slot containing the DCI that triggers the aperiodic CSI reporting and a slot in which the UE transmits the CSI report. The one block may include a PUCCH-CSI-Resource indicating a PUCCH on which the CSI report is transmitted. The one block may include a PUSCH-CSI-Resource indicating a grant of a PUSCH on which the CSI report is transmitted.

[0141] In certain embodiments, when a UE receives DCI format 3 triggering aperiodic CSI reporting for multiple DL BWPs, the UE calculates CSI based on the aperiodic CSI-RS resources transmitted in the multiple DL BWPs also indicated by DCI format 3. In a first method for determining the content of a CSI report for multiple DL BWPs triggered by DCI format 3, the CSI report includes CSI for each of the multiple DL BWPs. In a second method for determining the content of a CSI report for multiple DL BWPs triggered by DCI format 3, the CSI report includes CSI for the DL BWP with the best channel quality among the multiple DL BWPs. For example, the CSI may be the ID of the DL BWP with the best channel quality. For another example, the CSI may be the reported quantity of the DL BWP with the best channel quality, where the reported quantity is defined by reportQuantity and as described above.

[0142] although Figure 11 Method 1100 is shown, but may be Figure 7 Make various changes. For example, although Figure 11 The method 1100 is shown as a series of steps, but the steps can overlap, occur in parallel, occur in a different order, or occur multiple times. In another example, a step can be omitted or replaced by another step. For example, the steps of the method 1100 can be performed in a different order.

[0143] Figure 12An example method 1200 of a UE process for aperiodic CSI reporting of multiple DL BWPs according to an embodiment of the present disclosure is shown. For example, the steps of method 700 may be performed by Figure 1 Any one of the UEs 111-116 may execute, for example Figure 3 UE116. Figure 12 The method 1200 is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0144] In step 1202, a DCI format 3 configuration is provided to a UE, such as UE 116. Note that DCI format 3 includes K>1 consecutive A-CSI-RS triggering fields, each of which indicates a set of aperiodic CSI-RS resources for a DL BWP. In addition, DCI format 3 also includes a block indicating a CSI report.

[0145] In step 1204, the UE monitors DCI format 3 in the CSS set. Furthermore, in step 1204, the UE receives DCI format 3 for which the CRC check succeeds. In step 1206, the UE then performs CSI measurement on K>1 DL BWPs in ascending order of the A-CSI-RS triggering field index. The channel measurement for the kth DL BWP can be based on the aperiodic CSI-RS resource indicated by the kth A-CSI-RS triggering field.

[0146] After completing the channel measurement of the last DL BWP, the UE switches to the DL BWP with the best channel quality in step 1208. In step 1210, the UE determines the CSI report indicated by the block. The UE then sends the CSI report, where the CSI is derived from the channel measurements of the K DL BWPs.

[0147] In certain embodiments, a timeline requirement of Z1, Z2, or Z3 is provided to a UE, such as UE 116, to ensure sufficient CSI computation time. The UE expects that the timeline for aperiodic CSI reporting and aperiodic CSI measurement for multiple DL BWPs triggered by DCI format 3 meets the timeline requirement defined by any one of Z1, Z2, or Z3.

[0148] The timeline requirement for Z1 is the minimum time offset between the last symbol of the PDCCH that triggers aperiodic CSI reporting / measurement and the first symbol of the aperiodic CSI-RS resources in the first DL BWP that instructs the UE to perform CSI measurement. The timeline requirement for Z2 is the minimum time offset between the last symbol of the aperiodic CSI-RS resources from BWP_i and the first symbol of the aperiodic CSI-RS resources from BWP_j. The UE can receive an instruction to perform CSI measurement based on the aperiodic CSI-RS resources in BWP_j after completing the CSI measurement based on the aperiodic CSI-RS resources in BWP_i. The timeline requirement for Z3 is the minimum time offset between the last symbol of the aperiodic CSI-RS resources in the last DL BWP that instructs the UE to perform CSI measurement and the first symbol of the PUCCH / PUSCH that carries the CSI report. Note that to determine Z1, Z2, or Z3, the UE can report its capability for any of Z1, Z2, or Z3 to the network. The unit of Z1, Z2, or Z3 can be one slot, one OFDM symbol, or one millisecond.

[0149] although Figure 12 Method 1200 is shown, but may be Figure 12 Make various changes. For example, although Figure 12 The method 1200 is shown as a series of steps, but the steps can overlap, occur in parallel, occur in a different order, or occur multiple times. In another example, a step can be omitted or replaced by another step. For example, the steps of the method 1200 can be performed in a different order.

[0150] Figure 13 An example timeline 1300 of aperiodic CSI measurement and reporting is shown according to an embodiment of the disclosure. Figure 13 The example timeline 1300 is for illustration only, and other embodiments may be used without departing from the scope of this disclosure.

[0151] Figure 13 The example timeline 1300 shows that the active DL BWP is DL BWP # 2. As shown, the example timeline 1300 includes multiple blocks, such as blocks 1301, 1302, 1303, 1304, and 1305, separated by various time intervals, such as time 1306, 1307, 1308, 1308, and 1309.

[0152] Block 1301 is the PDCCH that triggers aperiodic CSI measurement and reporting for three DL BWPs. Block 1302 is the aperiodic CSI-RS resources in the first DL BWP for which a UE (such as UE 116) is instructed to perform CSI measurement. Block 1303 is the aperiodic CSI-RS resources in the second DL BWP for which the UE is instructed to perform CSI measurement. Block 1304 is the aperiodic CSI-RS resources in the last DL BWP for which the UE is instructed to perform CSI measurement. Block 1305 is the PUCCH or PUSCH that carries the aperiodic CSI report.

[0153] Time 1306 is the time offset between the last symbol of 1301 and the first symbol of 1302. Time 1307 is the time offset between the last symbol of 1302 and the first symbol of 1303. Time 1308 is the time offset between the last symbol of 1303 and the first symbol of 1304. Time 1309 is the time offset between the last symbol of 804 and the first symbol of 1305.

[0154] Thus, example timeline 1300 shows that the UE expects time 1306 to be no less than Z1. Similarly, the UE expects time 1307 to be no less than Z2. The UE also expects time 1308 to be no less than Z2. Additionally, the UE expects time 1309 to be no less than Z3.

[0155] In some embodiments, the UE receives a MAC CE to indicate CSI-RS resource reception / measurement of one or more DL BWPs, or one or more CSI reports based on the CSI-RS resource reception / measurement.

[0156] Although the figures illustrate different examples of user devices, various changes may be made to the figures. For example, the user device may include any number of each component in any suitable arrangement. In general, the figures do not limit the scope of the present disclosure to any particular (multiple) configurations. In addition, although the figures illustrate operating environments in which various user device features disclosed in this patent document may be used, these features may be used in any other suitable system.

[0157] Although the present disclosure has been described using exemplary embodiments, various variations and modifications may occur to those skilled in the art. The present disclosure is intended to encompass such variations and modifications as fall within the scope of the appended claims. Any description in this application should not be construed as implying that any particular element, step, or function is an essential element that must be included within the scope of the claims. The scope of a patented subject matter is defined by the claims.

Claims

1. A user equipment (UE) in a wireless communication system, the UE comprising: transceiver; and The processor is configured to: Received from a base station via the transceiver: information about a first configuration of a first set of downlink DL bandwidth parts (BWPs), wherein each DL BWP in the first set of DL BWPs has an index, information about a second configuration of a channel state information reference signal (CSI-RS) resource set in a second set of DL BWPs that is a subset of the first set of DL BWPs, information about a third configuration of CSI reporting corresponding to the second set of DL BWPs, and information about CSI-RS resources from a CSI-RS resource set in a third set of DL BWPs that is a subset of the second set of DL BWPs, determining a first number of CSI reports based on the received information about the CSI-RS resources, determining a second number of CSI reports from the first number of CSI reports, the second number of CSI reports including a value of a CSI report amount and information indicating a corresponding DL BWP index, the value of the CSI report amount being greater than a value of a CSI report amount in other CSI reports from the first number of CSI reports, and The second number of CSI reports is sent to the base station via the transceiver on a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH, where the second number of CSI reports includes a value of the CSI reporting amount and information indicating a corresponding DL BWP index.

2. The UE according to claim 1, wherein: The processor is further configured to receive information about the second number of configurations from the base station via the transceiver.

3. The UE according to claim 1, wherein: The CSI reporting quantity is one of the following: Channel Quality Indicator CQI, Reference Signal Received Power RSRP, or Signal-to-interference-and-noise ratio SINR.

4. The UE according to claim 1, wherein: The processor is further configured to: determining a duration for reception of a CSI-RS on the CSI-RS resource, During the duration, reception of a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) in the first set of DL BWPs is skipped, and After the duration, a signal is received on a PDCCH or PDSCH in an active DL BWP, wherein the active DL BWP is one of: a DL BWP from the first set of DL BWPs, wherein the DL BWP is a last DL BWP, wherein the transceiver is configured to receive a signal on a PDCCH or a PDSCH before the duration, or A DL BWP having a maximum value of the CSI reporting amount from the third set of DL BWPs.

5. The UE according to claim 1, wherein: The information about the second configuration further includes at least one of the following parameters: The periodicity of the measurement gap MG, denoted as T_MG, a time offset of said MG having a value from 0 to T_MG-1, and the duration of the MG; The processor is further configured to determine the MG based on the included one or more parameters, and receive information about the CSI-RS resources via the transceiver during the MG.

6. The UE according to claim 1, wherein: The processor is further configured to receive downlink control information (DCI) on a physical downlink control channel (PDCCH) via the transceiver, and The DCI includes a CSI request field, wherein the CSI request field has a value indicating at least one of the following: The third group of DL BWP, a start time and duration for reception of a CSI-RS on said CSI-RS resource, The CSI-RS on the CSI-RS resource, and Scheduling information for PUSCH or PUCCH transmission.

7. The UE according to claim 1, wherein: The processor is further configured to: receiving a signal on a physical downlink shared channel (PDSCH), the signal providing information about the second configuration, wherein the PDSCH is scheduled by a first downlink control information (DCI) format, the first DCI format having cyclic redundancy check (CRC) bits scrambled by a system information radio network temporary identifier (SI-RNTI), and A signal is received on a physical downlink control channel (PDCCH) according to a common search space, the signal providing a second DCI format, wherein the second DCI format includes a field having a value indicating the CSI-RS resource.

8. A base station in a wireless communication system, the base station comprising: transceiver; and The processor is configured to: Sent via the transceiver: information about a first configuration of a first set of downlink DL bandwidth parts (BWPs), wherein each DL BWP in the first set of DL BWPs has an index, information about a second configuration of a channel state information reference signal (CSI-RS) resource set in a second set of DL BWPs that is a subset of the first set of DL BWPs, information about a third configuration of CSI reporting corresponding to the second set of DL BWPs, and information about CSI-RS resources from a CSI-RS resource set in a third set of DL BWPs that is a subset of the second set of DL BWPs; and receiving, via the transceiver, a second number of CSI reports on a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH), the second number of CSI reports including a value of a CSI reporting amount and information indicating a corresponding DL BWP index, The value of the CSI reporting amount in the second number of CSI reports is greater than the value of the CSI reporting amount in other CSI reports from the first number of CSI reports based on the information about the CSI-RS resources.

9. The base station according to claim 8, wherein: The processor is further configured to transmit, via the transceiver, information regarding configuration of a number of CSI reports.

10. The base station according to claim 8, further comprising: The processor is configured to: determining a duration for transmitting a CSI-RS on the CSI-RS resource, During the duration, transmission of a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) in the first set of DL BWPs is skipped, and After the duration, a signal is sent on the PDCCH or PDSCH in an active DL BWP, where the active DL BWP is one of: a DL BWP from the first set of DL BWPs, wherein the DL BWP is a last DL BWP, wherein the transceiver is configured to transmit a signal on a PDCCH or a PDSCH before the duration, or The DL BWP with the index corresponding to the maximum value of the CSI reporting amount.

11. The base station according to claim 8, wherein: The information about the second configuration further includes at least one of the following parameters: The periodicity of the measurement gap MG, denoted as T_MG, a time offset of said MG having a value from 0 to T_MG-1, and the duration of the MG; The processor is further configured to determine the MG based on the included one or more parameters and transmit the CSI-RS resources via the transceiver during the MG.

12. The base station according to claim 8, wherein: The processor is further configured to transmit downlink control information (DCI) on a physical downlink control channel (PDCCH) via the transceiver, and The DCI includes a CSI request field, wherein the CSI request field has a value indicating at least one of the following: The third group of DL BWP, a start time and duration for transmission of the CSI-RS on the CSI-RS resource, The CSI-RS on the CSI-RS resource, and Scheduling information for transmission of the PUSCH or the PUCCH.

13. The base station according to claim 8, wherein The processor is further configured to: transmitting a signal on a physical downlink shared channel (PDSCH), the signal providing information about the second configuration, wherein the PDSCH is scheduled by a first downlink control information (DCI) format, the first DCI format having cyclic redundancy check (CRC) bits scrambled by a system information radio network temporary identifier (SI-RNTI), and A signal is sent on a physical downlink control channel (PDCCH) according to a common search space, the signal providing a second DCI format, wherein the second DCI format includes a field having a value indicating the CSI-RS resource.

14. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving information about a first configuration of a first group of downlink (DL) bandwidth parts (BWPs), wherein each DL BWP in the first group of DL BWPs has an index, information about a second configuration of a channel state information (CSI) reference signal (CSI) resource set in a second group of DL BWPs that is a subset of the first group of DL BWPs, information about a third configuration of CSI reports corresponding to the second group of DL BWPs, and information about CSI-RS resources from the CSI-RS resource set in a third group of DL BWPs that is a subset of the second group of DL BWPs; determining a first number of CSI reports based on the received information about the CSI-RS resources; determining a second number of CSI reports from the first number of CSI reports, the second number of CSI reports including a value of a CSI reporting amount and information indicating a corresponding DL BWP index, the value of the CSI reporting amount being greater than a value of a CSI reporting amount in other CSI reports from the first number of CSI reports; and The second number of CSI reports is sent on a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH, where the second number of CSI reports includes a value of the CSI reporting amount and information indicating a corresponding DL BWP index.

15. A method performed by a base station in a wireless communication system, the method comprising: transmitting information about a first configuration of a first group of downlink (DL) bandwidth parts (BWPs), wherein each DL BWP in the first group of DL BWPs has an index, information about a second configuration of a channel state information (CSI) reference signal (CSI) resource set in a second group of DL BWPs that is a subset of the first group of DL BWPs, information about a third configuration of a CSI report corresponding to the second group of DL BWPs, and information about CSI-RS resources from the CSI-RS resource set in a third group of DL BWPs that is a subset of the second group of DL BWPs; as well as receiving a second number of CSI reports on a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH), wherein the second number of CSI reports includes a value of a CSI reporting amount and information indicating a corresponding DL BWP index; The value of the CSI reporting amount in the second number of CSI reports is greater than the value of the CSI reporting amount in other CSI reports from the first number of CSI reports based on the information about the CSI-RS resources.

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