WO2020061938A1 - Rapport d'informations d'état de canal - Google Patents

Rapport d'informations d'état de canal Download PDF

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Publication number
WO2020061938A1
WO2020061938A1 PCT/CN2018/108064 CN2018108064W WO2020061938A1 WO 2020061938 A1 WO2020061938 A1 WO 2020061938A1 CN 2018108064 W CN2018108064 W CN 2018108064W WO 2020061938 A1 WO2020061938 A1 WO 2020061938A1
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WO
WIPO (PCT)
Prior art keywords
configuration
csi report
downlink
ptrs
csi
Prior art date
Application number
PCT/CN2018/108064
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English (en)
Inventor
Yu Zhang
Wanshi Chen
Peter Gaal
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Qualcomm Incorporated
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Filing date
Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2018/108064 priority Critical patent/WO2020061938A1/fr
Publication of WO2020061938A1 publication Critical patent/WO2020061938A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength

Definitions

  • aspects of the present disclosure generally relate to wireless communication, and more particularly to techniques and apparatuses for channel state information reporting.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, and/or the like) .
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless communication network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) .
  • a user equipment (UE) may communicate with a base station (BS) via the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the BS to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a Node B, a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , anew radio (NR) BS, a5G Node B, and/or the like.
  • New radio which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDM e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)
  • DFT-s-OFDM discrete Fourier transform spread OFDM
  • MIMO multiple-input multiple-output
  • a method ofwireless communication may include receiving, from a base station (BS) , a channel state information (CSI) report configuration and at least one of a reference frequency configuration associated with the CSI report configuration, or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration.
  • the method may include generating a CSI report based at least in part on the CSI report configuration, and the reference frequency configuration, or the downlink PTRS configuration.
  • the method may include transmitting the CSI report to the BS.
  • a user equipment (UE) for wireless communication may include memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to receive, from a base station (BS) , a channel state information (CSI) report configuration and at least one of a reference frequency configuration associated with the CSI report configuration, or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration.
  • the memory and the one or more processors may be configured to generate a CSI report based at least in part on the CSI report configuration, and the reference frequency configuration, or the downlink PTRS configuration.
  • the memory and the one or more processors may be configured to transmit the CSI report to the BS.
  • a non-transitorycomputer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a user equipment (UE) , may cause the one or more processors to receiving, from a base station (BS) , a channel state information (CSI) report configuration and at least one of a reference frequency configuration associated with the CSI report configuration, or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration.
  • the one or more instructions when executed by one or more processors of a user equipment, may cause the one or more processors to generate a CSI report based at least in part on the CSI report configuration, and the reference frequency configuration, or the downlink PTRS configuration.
  • the one or more instructions when executed by one or more processors of a user equipment, may cause the one or more processors to transmit the CSI report to the BS.
  • an apparatus for wireless communication may include means for receiving, from a base station (BS) , a channel state information (CSI) report configuration and at least one of a reference frequency configuration associated with the CSI report configuration, or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration.
  • the apparatus may include means for generating a CSI report based at least in part on the CSI report configuration, and the reference frequency configuration, or the downlink PTRS configuration.
  • the apparatus may include means for transmitting the CSI report to the BS.
  • a method of wireless communication may include transmitting, to a user equipment (UE) , a channel state information (CSI) report configuration and at least one of a reference frequency configuration associated with the CSI report configuration, or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration.
  • the method may include receiving, based at least in part on transmitting the CSI report configuration and the at least one of the reference frequency configuration or the downlink PTRS configuration to the UE, a CSI report from the UE, wherein the CSI report is based at least in part on the CSI report configuration, and the reference frequency configuration, or the downlink PTRS configuration.
  • CSI channel state information
  • PTRS downlink phase tracking reference signal
  • a base station (BS) for wireless communication may include memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to transmit, to a user equipment (UE) , a channel state information (CSI) report configuration and at least one of a reference frequency configuration associated with the CSI report configuration, or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration.
  • UE user equipment
  • CSI channel state information
  • PTRS downlink phase tracking reference signal
  • the memory and the one or more processors may be configured to receive, based at least in part on transmitting the CSI report configuration and the at least one of the reference frequency configuration or the downlink PTRS configuration to the UE, a CSI report from the UE, wherein the CSI report is based at least in part on the CSI report configuration, and the reference frequency configuration, or the downlink PTRS configuration.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a base station (BS) , may cause the one or more processors to transmit, to a user equipment (UE) , a channel state information (CSI) report configuration and at least one of a reference frequency configuration associated with the CSI report configuration, or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration.
  • CSI channel state information
  • PTRS downlink phase tracking reference signal
  • the one or more instructions when executed by one or more processors of a user equipment, may cause the one or more processors to receive, based at least in part on transmitting the CSI report configuration and the at least one of the reference frequency configuration or the downlink PTRS configuration to the UE, a CSI report from the UE, wherein the CSI report is based at least in part on the CSI report configuration, and the reference frequency configuration, or the downlink PTRS configuration.
  • an apparatus for wireless communication may include means for transmitting, to a user equipment (UE) , a channel state information (CSI) report configuration and at least one of a reference frequency configuration associated with the CSI report configuration, or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration.
  • the apparatus may include means for receiving, based at least in part on transmitting the CSI report configuration and the at least one of the reference frequency configuration or the downlink PTRS configuration to the UE, a CSI report from the UE, wherein the CSI report is based at least in part on the CSI report configuration, and the reference frequency configuration, or the downlink PTRS configuration.
  • a method of wireless communication may include receiving, from a base station (BS) , at least one of a first downlink phase tracking reference signal (PTRS) configuration and a second downlink PTRS configuration, or an uplink PTRS configuration, wherein the first downlink PTRS configuration is associated with an enhanced mobile broadband (eMBB) based channel state information (CSI) report configuration, and the second downlink PTRS configuration is associated with an ultra reliable low latency communications (URLLC) based CSI report configuration, wherein the first downlink PTRS configuration is associated with an eMBB based physical downlink shared channel (PDSCH) configuration, and the second downlink PTRS configuration is associated with a URLLC based PDSCH configuration, and wherein the uplink PTRS configuration is associated with an eMBB based physical uplink shared channel (PUSCH) configuration and a URLLC based PUSCH configuration.
  • eMBB enhanced mobile broadband
  • URLLC ultra reliable low latency communications
  • the method may include at least one of configuring CSI reporting, for the UE, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration, configuring downlink communications, for the UE, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration, or configuring uplink communications, for the UE, based at least in part on the uplink PTRS configuration.
  • a user equipment (UE) for wireless communication may include memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to receive, from a base station (BS) , at least one of a first downlink phase tracking reference signal (PTRS) configuration and a second downlink PTRS configuration, or an uplink PTRS configuration, wherein the first downlink PTRS configuration is associated with an enhanced mobile broadband (eMBB) based channel state information (CSI) report configuration, and the second downlink PTRS configuration is associated with an ultra reliable low latency communications (URLLC) based CSI report configuration, wherein the first downlink PTRS configuration is associated with an eMBB based physical downlink shared channel (PDSCH) configuration, and the second downlink PTRS configuration is associated with a URLLC based PDSCH configuration, and wherein the uplink PTRS configuration is associated with an eMBB based physical uplink shared channel (PUSCH) configuration and a URLLC based PUSCH configuration.
  • the memory and the one or more processors may be configured to at least one of configure CSI reporting, for the UE, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration, configure downlink communications, for the UE, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration, or configure uplink communications, for the UE, based at least in part on the uplink PTRS configuration.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a user equipment (UE) , may cause the one or more processors to receive, from a base station (BS) , at least one of a first downlink phase tracking reference signal (PTRS) configuration and a second downlink PTRS configuration, or an uplink PTRS configuration, wherein the first downlink PTRS configuration is associated with an enhanced mobile broadband (eMBB) based channel state information (CSI) report configuration, and the second downlink PTRS configuration is associated with an ultra reliable low latency communications (URLLC) based CSI report configuration, wherein the first downlink PTRS configuration is associated with an eMBB based physical downlink shared channel (PDSCH) configuration, and the second downlink PTRS configuration is associated with a URLLC based PDSCH configuration, and wherein the uplink PTRS configuration is associated with an eMBB based physical uplink shared channel (PUSCH) configuration
  • the one or more instructions when executed by one or more processors of, may cause the one or more processors to at least one of configure CSI reporting, for the UE, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration, configure downlink communications, for the UE, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration, or configure uplink communications, for the UE, based at least in part on the uplink PTRS configuration.
  • an apparatus for wireless communication may include means for receiving, from a base station (BS) , at least one of a first downlink phase tracking reference signal (PTRS) configuration and a second downlink PTRS configuration, or an uplink PTRS configuration, wherein the first downlink PTRS configuration is associated with an enhanced mobile broadband (eMBB) based channel state information (CSI) report configuration, and the second downlink PTRS configuration is associated with an ultra reliable low latency communications (URLLC) based CSI report configuration, wherein the first downlink PTRS configuration is associated with an eMBB based physical downlink shared channel (PDSCH) configuration, and the second downlink PTRS configuration is associated with a URLLC based PDSCH configuration, and wherein the uplink PTRS configuration is associated with an eMBB based physical uplink shared channel (PUSCH) configuration and a URLLC based PUSCH configuration.
  • eMBB enhanced mobile broadband
  • URLLC ultra reliable low latency communications
  • the apparatus may include at least one of means for configuring CSI reporting, for the apparatus, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration, means for configuring downlink communications, for the apparatus, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration, or means for configuring uplink communications, for the apparatus, based at least in part on the uplink PTRS configuration.
  • Fig. 1 is a block diagram conceptually illustrating an example of a wireless communication network, in accordance with various aspects of the present disclosure.
  • Fig. 2 is a block diagram conceptually illustrating an example of a base station in communication with a user equipment (UE) in a wireless communication network, in accordance with various aspects of the present disclosure.
  • UE user equipment
  • Fig. 3A is a block diagram conceptually illustrating an example of a frame structure in a wireless communication network, in accordance with various aspects of the present disclosure.
  • Fig. 3B is a block diagram conceptually illustrating an example synchronization communication hierarchy in a wireless communication network, in accordance with various aspects of the present disclosure.
  • Fig. 4 is a block diagram conceptually illustrating an example slot format with a normal cyclic prefix, in accordance with various aspects of the present disclosure.
  • Fig. 5 illustrates an example logical architecture of a distributed radio access network (RAN) , in accordance with various aspects of the present disclosure.
  • RAN radio access network
  • Fig. 6 illustrates an example physical architecture of a distributed RAN, in accordance with various aspects of the present disclosure.
  • Fig. 7 is a diagram illustrating an example ofchannel state information reporting, in accordance with various aspects of the present disclosure.
  • Fig. 8 is a diagram illustrating an example of various configurations for channel state information reporting.
  • Fig. 9 is a diagram illustrating various example CSI trigger state configurations.
  • Fig. 10 is a diagram illustrating an example process performed, for example, by a user equipment, in accordance with various aspects of the present disclosure.
  • Fig. 11 is a diagram illustrating an example process performed, for example, by a base station, in accordance with various aspects of the present disclosure.
  • Fig. 12 is a diagram illustrating an example process performed, for example, by a user equipment, in accordance with various aspects of the present disclosure.
  • aspects may be described herein using terminology commonly associated with 3G and/or 4G wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems, such as 5G and later, including NR technologies.
  • Fig. 1 is a diagram illustrating a network 100 in which aspects of the present disclosure may be practiced.
  • the network 100 may be an LTE network or some other wireless network, such as a 5G or NR network.
  • Wireless network 100 may include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station, a NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, a transmit receive point (TRP) , and/or the like.
  • Each BS may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (e.g., three) cells.
  • eNB base station
  • NR BS NR BS
  • gNB gNode B
  • AP AP
  • node B node B
  • 5G NB 5G NB
  • cell may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the access network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.
  • Wireless network 100 may also include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that can relay transmissions for other UEs.
  • a relay station 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay station may also be referred to as a relay BS, a relay base station, a relay, and/or the like.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impact on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 Watts) .
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.
  • UEs 120 may be dispersed throughout wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like.
  • AUE may be a cellular phone (e.g., a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet) ) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, such as sensors, meters, monitors, location tags, and/or the like, that may communicate with a base station, another device (e.g., remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered a Customer Premises Equipment (CPE) .
  • UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular RAT and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, and/or the like.
  • Afrequency may also be referred to as a carrier, a frequency channel, and/or the like.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another) .
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the like) , a mesh network, and/or the like.
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • Fig. 1 is provided merely as an example. Other examples are possible and may differ from what was described with regard to Fig. 1.
  • Fig. 2 shows a block diagram of a design200of base station 110 and UE120, which may be one of the base stations and one of the UEs in Fig. 1.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • Transmit processor 220 may also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS) ) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS) ) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • TX transmit
  • MIMO multiple-input multiple-output
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • the synchronization signals can be generated with location encoding to convey additional information.
  • antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • a channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , and/or the like.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality
  • CQI channel quality indicator
  • one or more components of UE 120 may be included in a housing.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like) , and transmitted to base station 110.
  • modulators 254a through 254r e.g., for DFT-s-OFDM, CP-OFDM, and/or the like
  • the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120.
  • Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240.
  • Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244.
  • Network controller 130 may include communication unit 294, controller/processor 290, and memory 292.
  • Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with channel state information reporting, as described in more detail elsewhere herein.
  • controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 1000of Fig. 10, process 1100of Fig. 11, process 1200of Fig. 12, and/or other processes as described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • a scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.
  • UE 120 may include means for receiving, from a base station (BS) , a channel state information (CSI) report configuration, and at least one of a reference frequency configuration associated with the CSI report configuration, or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration; means for generating a CSI report based at least in part on the CSI report configuration, and the reference frequency configuration or the downlink PTRS configuration; means for transmitting the CSI report to the BS; and/or the like.
  • BS base station
  • CSI channel state information
  • PTRS downlink phase tracking reference signal
  • UE 120 may include means for receiving, from a base station (BS) , at least one of a first downlink phase tracking reference signal (PTRS) configuration and a second downlink PTRS configuration, or an uplink PTRS configuration, wherein the first downlink PTRS configuration is associated with an enhanced mobile broadband (eMBB) based channel state information (CSI) report configuration, and the second downlink PTRS configuration is associated with an ultra reliable low latency communications (URLLC) based CSI report configuration, wherein the first downlink PTRS configuration is associated with an eMBB based physical downlink shared channel (PDSCH) configuration, and the second downlink PTRS configuration is associated with a URLLC based PDSCH configuration, and wherein the uplink PTRS configuration is associated with an eMBB based physical uplink shared channel (PUSCH) configuration and a URLLC based PUSCH configuration; at least one of means for configuring CSI reporting, for the UE, based at least in part on the first downlink PTRS configuration and the second
  • base station 110 may include means for transmitting, to a user equipment (UE) a channel state information (CSI) report configuration, and at least one of a reference frequency configuration associated with the CSI report configuration, or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration; means for receiving, based at least in part on transmitting the CSI report configuration and the at least one of the reference frequency configuration or the downlink PTRS configuration to the UE, a CSI report from the UE, wherein the CSI report is based at least in part on the CSI report configuration, and the reference frequency configuration, or the downlink PTRS configuration; and/or the like.
  • such means may include one or more components of base station 110 described in connection with Fig. 2.
  • Fig. 2 is provided merely as an example. Other examples are possible and may differ from what was described with regard to Fig. 2.
  • Fig. 3A shows an example frame structure 300 for FDD in a telecommunications system (e.g., NR) .
  • the transmission timeline for each of the downlink and uplink may be partitioned into units of radio frames (sometimes referred to as frames) .
  • Each radio frame may have a predetermined duration (e.g., 10 milliseconds (ms) ) and may be partitioned into a set of Z (Z ⁇ 1) subframes (e.g., with indices of 0 through Z-1) .
  • Each subframe may have a predetermined duration (e.g., 1ms) and may include a set of slots (e.g., 2 m slots per subframe are shown in Fig.
  • Each slot may include a set of L symbol periods.
  • each slot may include fourteen symbol periods (e.g., as shown in Fig. 3A) , seven symbol periods, or another number of symbol periods.
  • the subframe may include 2L symbol periods, where the 2L symbol periods in each subframe may be assigned indices of 0 through 2L-1.
  • a scheduling unit for the FDD may frame-based, subframe-based, slot-based, symbol-based, and/or the like.
  • a wireless communication structure may refer to a periodic time-bounded communication unit defined by a wireless communication standard and/or protocol. Additionally, or alternatively, different configurations of wireless communication structures than those shown in Fig. 3A may be used.
  • a base station may transmit synchronization signals.
  • a base station may transmit a primary synchronization signal (PSS) , a secondary synchronization signal (SSS) , and/or the like, on the downlink for each cell supported by the base station.
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • the PSS and SSS may be used by UEs for cell search and acquisition.
  • the PSS may be used by UEs to determine symbol timing
  • the SSS may be used by UEs to determine a physical cell identifier, associated with the base station, and frame timing.
  • the base station may also transmit a physical broadcast channel (PBCH) .
  • the PBCH may carry some system information, such as system information that supports initial access by UEs.
  • the base station may transmit the PSS, the SSS, and/or the PBCH in accordance with a synchronization communication hierarchy (e.g., a synchronization signal (SS) hierarchy) including multiple synchronization communications (e.g., SS blocks) , as described below in connection with Fig. 3B.
  • a synchronization communication hierarchy e.g., a synchronization signal (SS) hierarchy
  • multiple synchronization communications e.g., SS blocks
  • Fig. 3B is a block diagram conceptually illustrating an example SS hierarchy, which is an example of a synchronization communication hierarchy.
  • the SS hierarchy may include an SS burst set, which may include a plurality of SS bursts (identified as SS burst 0 through SS burst B-1, where B is a maximum number of repetitions of the SS burst that may be transmitted by the base station) .
  • each SS burst may include one or more SS blocks (identified as SS block 0 through SS block (b max_SS-1 ) , where b max_SS-1 is a maximum number of SS blocks that can be carried by an SS burst) .
  • An SS burst set may be periodically transmitted by a wireless node, such as every X milliseconds, as shown in Fig. 3B.
  • an SS burst set may have a fixed or dynamic length, shown as Y milliseconds in Fig. 3B.
  • the SS burst set shown in Fig. 3B is an example of a synchronization communication set, and other synchronization communication sets may be used in connection with the techniques described herein.
  • the SS block shown in Fig. 3B is an example of a synchronization communication, and other synchronization communications may be used in connection with the techniques described herein.
  • an SS block includes resources that carry the PSS, the SSS, the PBCH, and/or other synchronization signals (e.g., a tertiary synchronization signal (TSS) ) and/or synchronization channels.
  • synchronization signals e.g., a tertiary synchronization signal (TSS)
  • multiple SS blocks are included in an SS burst, and the PSS, the SSS, and/or the PBCH may be the same across each SS block of the SS burst.
  • a single SS block may be included in an SS burst.
  • the SS block may be at least four symbol periods in length, where each symbol carries one or more of the PSS (e.g., occupying one symbol) , the SSS (e.g., occupying one symbol) , and/or the PBCH (e.g., occupying two symbols) .
  • the symbols of an SS block are consecutive, as shown in Fig. 3B. In some aspects, the symbols of an SS block are non-consecutive. Similarly, in some aspects, one or more SS blocks of the SS burst may be transmitted in consecutive radio resources (e.g., consecutive symbol periods) during one or more slots. Additionally, or alternatively, one or more SS blocks of the SS burst may be transmitted in non-consecutive radio resources.
  • the SS bursts may have a burst period, whereby the SS blocks of the SS burst are transmitted by the base station according to the burst period. In other words, the SS blocks may be repeated during each SS burst.
  • the SS burst set may have a burst set periodicity, whereby the SS bursts of the SS burst set are transmitted by the base station according to the fixed burst set periodicity. In other words, the SS bursts may be repeated during each SS burst set.
  • the base station may transmit system information, such as system information blocks (SIBs) on a physical downlink shared channel (PDSCH) in certain slots.
  • SIBs system information blocks
  • the base station may transmit control information/data on a physical downlink control channel (PDCCH) in C symbol periods of a slot, where B may be configurable for each slot.
  • the base station may transmit traffic data and/or other data on the PDSCH in the remaining symbol periods of each slot.
  • Figs. 3A and 3B are provided as examples. Other examples are possible and may differ from what was described with regard to Figs. 3A and 3B.
  • Fig. 4 shows an example slot format 410 with a normal cyclic prefix.
  • the available time frequency resources may be partitioned into resource blocks.
  • Each resource block may cover a set to of subcarriers (e.g., 12 subcarriers) in one slot and may include a number of resource elements.
  • Each resource element may cover one subcarrier in one symbol period (e.g., in time) and may be used to send one modulation symbol, which may be a real or complex value.
  • An interlace structure may be used for each of the downlink and uplink for FDD in certain telecommunications systems (e.g., NR) .
  • Q interlaces with indices of 0 through Q -1 may be defined, where Q may be equal to 4, 6, 8, 10, or some other value.
  • Each interlace may include slots that are spaced apart by Q frames.
  • interlace q may include slots q, q + Q, q + 2Q, etc., where q ⁇ ⁇ 0, ..., Q-1 ⁇ .
  • a UE may be located within the coverage of multiple BSs. One of these BSs may be selected to serve the UE. The serving BS may be selected based at least in part on various criteria such as received signal strength, received signal quality, path loss, and/or the like. Received signal quality may be quantified by a signal-to-noise-and-interference ratio (SINR) , or a reference signal received quality (RSRQ) , or some other metric.
  • SINR signal-to-noise-and-interference ratio
  • RSRQ reference signal received quality
  • the UE may operate in a dominant interference scenario in which the UE may observe high interference from one or more interfering BSs.
  • New radio may refer to radios configured to operate according to a new air interface (e.g., other than Orthogonal Frequency Divisional Multiple Access (OFDMA) -based air interfaces) or fixed transport layer (e.g., other than Internet Protocol (IP) ) .
  • NR may utilize OFDM with a CP (herein referred to as cyclic prefix OFDM or CP-OFDM) and/or SC-FDM on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD.
  • OFDM Orthogonal Frequency Divisional Multiple Access
  • IP Internet Protocol
  • NR may, for example, utilize OFDM with a CP (herein referred to as CP-OFDM) and/or discrete Fourier transform spread orthogonal frequency-division multiplexing (DFT-s-OFDM) on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD.
  • CP-OFDM OFDM with a CP
  • DFT-s-OFDM discrete Fourier transform spread orthogonal frequency-division multiplexing
  • NR may include Enhanced Mobile Broadband (eMBB) service targeting wide bandwidth (e.g., 80 megahertz (MHz) and beyond) , millimeter wave (mmW) targeting high carrier frequency (e.g., 60 gigahertz (GHz) ) , massive MTC (mMTC) targeting non-backward compatible MTC techniques, and/or mission critical targeting ultra reliable low latency communications (URLLC) service.
  • eMBB Enhanced Mobile Broadband
  • mmW millimeter wave
  • mMTC massive MTC
  • URLLC ultra reliable low latency communications
  • NR resource blocks may span 12 sub-carriers with a sub-carrier bandwidth of 60 or 120 kilohertz (kHz) over a 0.1 millisecond (ms) duration.
  • Each radio frame may include 40 slots and may have a length of 10 ms. Consequently, each slot may have a length of 0.25 ms.
  • Each slot may indicate a link direction (e.g., DL or UL) for data transmission and the link direction for each slot may be dynamically switched.
  • Each slot may include DL/UL data as well as DL/UL control data.
  • NR may support a different air interface, other than an OFDM-based interface.
  • NR networks may include entities such central units or distributed units.
  • Fig. 4 is provided as an example. Other examples are possible and may differ from what was described with regard to Fig. 4.
  • a 5G access node 506 may include an access node controller (ANC) 502.
  • the ANC may be a central unit (CU) of the distributed RAN 500.
  • the backhaul interface to the next generation core network (NG-CN) 504 may terminate at the ANC.
  • the backhaul interface to neighboring next generation access nodes (NG-ANs) may terminate at the ANC.
  • the ANC may include one or more TRPs 508 (which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs, gNB, or some other term) .
  • TRPs 508 which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs, gNB, or some other term.
  • TRPs 508 which may also be referred to as BSs, NR BSs, Node Bs, 5G NBs, APs, gNB, or some other term
  • the TRPs 508 may be a distributed unit (DU) .
  • the TRPs may be connected to one ANC (ANC 502) or more than one ANC (not illustrated) .
  • ANC 502 ANC 502
  • RaaS radio as a service
  • a TRP may include one or more antenna ports.
  • the TRPs may be configured to individually (e.g., dynamic selection) or jointly (e.g., joint transmission) serve traffic to a UE.
  • the local architecture of RAN 500 may be used to illustrate fronthaul definition.
  • the architecture may be defined that support fronthauling solutions across different deployment types.
  • the architecture may be based at least in part on transmit network capabilities (e.g., bandwidth, latency, and/or jitter) .
  • the architecture may share features and/or components with LTE.
  • the next generation AN (NG-AN) 510 may support dual connectivity with NR.
  • the NG-AN may share a common fronthaul for LTE and NR.
  • the architecture may enable cooperation between and among TRPs 508. For example, cooperation may be preset within a TRP and/or across TRPs via the ANC 502. According to aspects, no inter-TRP interface may be needed/present.
  • a dynamic configuration of split logical functions may be present within the architecture of RAN 500.
  • the packet data convergence protocol (PDCP) may be adaptably placed at the ANC or TRP.
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC media access control
  • a BS may include a central unit (CU) (e.g., ANC 502) and/or one or more distributed units (e.g., one or more TRPs 508) .
  • CU central unit
  • distributed units e.g., one or more TRPs 508 .
  • Fig. 5 is provided merely as an example. Other examples are possible and may differ from what was described with regard to Fig. 5.
  • FIG. 6 illustrates an example physical architecture of a distributed RAN 600, according to aspects of the present disclosure.
  • a centralized core network unit (C-CU) 602 may host core network functions.
  • the C-CU may be centrally deployed.
  • C-CU functionality may be offloaded (e.g., to advanced wireless services (AWS) ) , in an effort to handle peak capacity.
  • AWS advanced wireless services
  • a centralized RAN unit (C-RU) 604 may host one or more ANC functions.
  • the C-RU may host core network functions locally.
  • the C-RU may have distributed deployment.
  • the C-RU may be closer to the network edge.
  • a distributed unit (DU) 606 may host one or more TRPs.
  • the DU may be located at edges of the network with radio frequency (RF) functionality.
  • RF radio frequency
  • Fig. 6 is provided merely as an example. Other examples are possible and may differ from what was described with regard to Fig. 6.
  • a user equipment may transmit a channel state information (CSI) report communication to a base station.
  • the CSI report communication may include information identifying a performance and/or capability of the user equipment to receive downlink communications from the base station, such as a channel quality indicator (CQI) value, arank indicator (RI) , a precoding matrix indicator (PMI) , a CSI-RS resource indicator (CRI) , a reference signal received power (RSRP) value, areference signal received quality (RSRQ) value, areceived signal strength indicator (RSSI) value, and/or the like.
  • CQI channel quality indicator
  • RI rank indicator
  • PMI precoding matrix indicator
  • RSRP reference signal received power
  • RSSI areference signal received quality
  • RSSI areceived signal strength indicator
  • the UE may generate the CSI report based at least in part on a CSI reference resource, which may include information identifying a hypothetical and/or assumed a set of physical downlink resource blocks, included in a physical downlink shared channel (PDSCH) associated with the downlink of the connection between the user equipment and the base station, having a particular modulation scheme, a particular target code rate, a particular transport block size, and/or the like, that the UE mayto use for CSI computation.
  • a CSI reference resource may include information identifying a hypothetical and/or assumed a set of physical downlink resource blocks, included in a physical downlink shared channel (PDSCH) associated with the downlink of the connection between the user equipment and the base station, having a particular modulation scheme, a particular target code rate, a particular transport block size, and/or the like, that the UE mayto use for CSI computation.
  • a CSI reference resource may include information identifying a hypothetical and/or assumed a set of physical downlink resource blocks, included in a physical downlink shared
  • the CSI reference resource may represent a quantity of resource elements, included in downlink and/or uplink, that may be used to transmit downlink and/or uplink control signaling and/or reference signals (e.g., for control signaling, for reference signaling, and/or the like) , and/or a quantity of resource elements, included in the PDSCH, that may be used to transmit downlink data.
  • the base station may transmit a phase tracking reference signal (PTRS) to the user equipment, which may be used for phase tracking purposes on the downlink of the connection between the user equipment and the base station, on the uplink, and/or the like.
  • PTRS phase tracking reference signal
  • the user equipment may use the PTRS to mitigate phase noise and/or common mode phase errors, particularly at millimeter wave frequencies, on the downlink of the connection between the user equipment and the base station, on an uplink of the connection, and/or the like.
  • the PTRS may be included in the downlink overhead of the downlink and/or the uplink.
  • the CSI reference resource described above, may not take into account the downlink overhead occupied by the PTRS.
  • the user equipment may erroneously include, when generating a CSI report, the downlink overhead, occupied by the PTRS, as part of the PDSCHbandwidth that is available for data transmission.
  • a base station may transmit, to a user equipment (UE) , a channel state information (CSI) report configuration, and at least one of a reference frequency configuration associated with the CSI report configuration or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration.
  • the UE may generate a CSI report based at least in part on the CSI report configuration, and the reference frequency configuration or the downlink PTRS configuration, and may transmit the CSI report to the BS.
  • the UE may take into account a PTRS included in the overhead of a downlink and/or an uplink of a connection between the UE and the BS.
  • the UE may be capable of generating a more accurate CSI report than without having the reference frequency configuration and/or the PTRS configuration, which increases the efficiency of the PDSCH, increases throughput on the downlink, decreases the quantity of delayed and/or dropped downlink communications on the downlink, and/or the like.
  • Fig. 7 is a diagram illustrating an example 700of channel state information reporting, in accordance with various aspects of the present disclosure.
  • example 700 may include a base station (e.g., BS 110) and a user equipment (e.g., UE 120) .
  • UE 120 may be communicatively connected with BS 110.
  • UE 120 may generate and transmit aCSI report to BS 110 to provide BS 110 with information identifying a performance and/or capability of UE 120 to receive downlink communications, from BS 110, on a PDSCH associated with a downlink of a connection between BS 110 and US 120.
  • BS 110 may transmit, to UE 120, a CSI report configuration and at least one of a reference frequency configuration and/or a PTRS configuration.
  • BS 110 may transmit the CSI report configuration, the reference frequency configuration, and/or the PTRS configuration in one or more downlink control indicator (DCI) communications, in one or more radio resource control (RRC) configuration communications, and/or one or more other types of control and/or signaling communications.
  • DCI downlink control indicator
  • RRC radio resource control
  • the CSI report configuration may specify one or more parameters for UE 120 to generate a CSI report.
  • the one or more parameters may include a quantity of symbols (e.g., orthogonal frequency division multiplexing (OFDM) symbols and/or one or more other types of symbols) , included in the downlink, for control signaling; a subcarrier spacing for the PDSCH; a CSI reference resource; one or more sub-bands, of the downlink, that UE 120 is to use for CSI computation purposes (e.g., that UE 120 is to use to determine a CQI value, a RSRP value, a RI, a PMI, a CRI, a RSRQ value, a RSSI value, and/or the like) ; and/or the like.
  • OFDM orthogonal frequency division multiplexing
  • the reference frequency configuration may include information identifying a reference bandwidth for the PDSCH.
  • the bandwidth of the PDSCH may be divided into a plurality of sub-bands.
  • the bandwidth of the PDSCH may be 20 MHz or any other bandwidth, and the bandwidth may be divided into ten sub-bands, each being 2 MHz or any other bandwidth.
  • the reference bandwidth may include information identifying one or more resource blocks or another unit of radio resources, included in the one or more sub-bands that are identified in the CSI report configuration, that UE 120 is to use forCSI computation purposes (e.g., to use to determine the CQI value, the RSRP value, the RI, the PMI, the CRI, the RSRQ value, the RSSI value, and/or the like) .
  • UE 120does not take into account, consider, classify, and/or categorize one or more resource elements and/or resource blocks, included in the one or more sub-bands, that BS 110 is to use to transmit a PTRS to UE 120, are not included in the downlink bandwidth, as being available for data transmission.
  • the one or more parameters included in the CSI report configuration may specify a plurality of sub-bands that UE 120 is to use to generate the CSI report.
  • the reference frequency configuration may include a resource block selection that identifies, for each sub-band, one or more resource blocks that UE 120 is to use to generate the CSI report.
  • the PTRS configuration may include information identifying a PTRS density for the downlink and/or the uplink.
  • the PTRS density may specify a quantity of resource blocks, included in the one or more sub-bands that are identified in the CSI report configuration, that BS 110 is to use to transmit the PTRS to UE 120 on the downlink and/or the uplink.
  • the PTRS density information may specify that the PTRS density is to be taken into account (or not taken into account) when generating the CSI report, and may specify that the PTRS density is to be taken into account (or not taken into account) for determining phase noise estimation quality for mitigating phase noise and/or common mode phase errors in the downlink.
  • UE 120 can be more flexibly configured to take into account (or not take into account) the PTRS density.
  • the PTRS density may be low enough that the PTRS may have very little impact on the CSI report, and accordingly BS 110 may configure the PTRS configuration such that UE 120 does not take into account the PTRS density when generating the CSI report, but still takes into account the PTRS when determining the phase noise estimation quality of the downlink.
  • BS 110 may transmit, to UE 120, a plurality of CSI configurations, a plurality of reference frequency configurations, and/or a plurality of PTRS configurations.
  • BS 110 and UE 120 may be included in a communication system that is configured with a plurality of different service configurations, such as an ultra reliable low latency communication (URLLC) service configuration, an enhanced mobile broadband (eMBB) service configuration, and/or the like.
  • BS 110 may transmit, to UE 120, one or moreCSI report configurations and at least one of one or more reference frequency configurations and/or one or more PTRS configurations for each service configuration type.
  • the one or more CSI report configurations, the one or more reference frequency configurations, the and/or one or more PTRS configurations for a first service configuration may be the same as the one or more CSI report configurations, the one or more reference frequency configurations, and/or the one or more PTRS configurations for a second service configuration (e.g., eMBB) , may be different from the one or more CSI report configurations, the one or more reference frequency configurations, and/or the one or more PTRS configurations for a second service configuration, and or the like.
  • BS 110 may transmit, to UE 120, different PTRS configurations for the downlink of the connection between BS 110 and UE 120 (e.g., one or more downlink PTRS configurations) and for the uplink of the connection between BS 110 and UE 120 (e.g., one or more uplink PTRS configurations) .
  • different PTRS configurations for the downlink of the connection between BS 110 and UE 120 (e.g., one or more downlink PTRS configurations) and for the uplink of the connection between BS 110 and UE 120 (e.g., one or more uplink PTRS configurations) .
  • BS 110 may transmit a first downlink PTRS configuration that is associated with an eMBB based CSI report configuration, a second downlink PTRS configuration that is associated with a URLLC based CSI report configuration, an uplink PTRS configuration that is associated with an eMBB based physical uplink shared channel (PUSCH) configuration and/or a URLLC based PUSCH configuration, and/or the like.
  • the first downlink PTRS configuration may be associated with an eMBB based PDSCH configuration
  • the second downlink PTRS configuration may be associated with a URLLC based PDSCH configuration.
  • UE 120 may configure CSI reporting, for UE 120, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration, may configure downlink communications, for UE 120, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration, may configure uplink communications, for UE 120, based at least in part on the uplink PTRS configuration, and/or the like.
  • BS 110 may transmit, to UE 120, one or more CSI trigger state configurations.
  • a CSI trigger state configuration may specify one or more triggering configurations, which may include a combination of a CSI report configuration and at least one of a reference frequency configuration and/or a PTRS configuration.
  • BS 110 may use a CSI trigger state configuration to request, from UE 120, a plurality of CSI reports that are generated based at least in part on different combinations of CSI report configurations, reference frequency configurations, and/or PTRS configurations.
  • BS 110 may transmit a CSI report request to UE 120, and UE 120 may receive the CSI report request.
  • the CSI report request may be an aperiodic CSI report request, a semi-persistent CSI report request, and/or the like.
  • the CSI report request may identify a CSI reporting configuration and at least one of a reference frequency configuration and/or a PTRS configuration that UE 120 is to use to generate a CSI report.
  • the CSI report may identify a CSI trigger state configuration that UE 120 is to use to generate the CSI report.
  • the CSI trigger state configuration may include one or more triggering configurations, and the one or more triggering configurations may each include a CSI reporting configuration and at least one of a reference frequency configuration and/or a PTRS configuration.
  • the CSI report request may identify the CSI trigger state configuration that UE 120 is to use to generate the CSI report, as well as a triggering configuration, of the one or more triggering configurations included in the CSI trigger state configuration identified in the CSI report request, that UE 120 is to use to generate the CSI report.
  • UE 120 may generate a CSI report.
  • UE 120 may periodically and/or semi-persistently generate the CSI report at a particular time interval (e.g., without receiving a CSI report request) , may aperiodically generate the CSI report (e.g., based at least in part on receiving the CSI report request from BS 110, based at least in part on detecting the occurrence of an event such as UE 120 entering a coverage area of another base station, and/or the like) , and/or the like.
  • UE 120 may generate the CSI report based at least in part on the CSI report configuration, the reference frequency configuration, and/or the PTRS configuration. For example, UE 120 may generate a CSI report for each sub-band identified in the CSI report configuration. As another example, UE 120 may generate a CSI report, for a particular sub-band, based at least in part on one or more resource blocks, included in the particular sub-band, that are specified in the reference frequency configuration (e.g., UE 120 may generate the CSI report based at least in part on the bandwidth of the one or more reference blocks) .
  • UE 120 may generate a CSI report, for a particular sub-band, based at least in part on a quantity of resource blocks, included in the particular sub-band, that BS 110 is to use to transmit the PTRS to UE 120 (e.g., UE 120 may generate the CSI report by not including the one or more resource blocks, that BS 110 is to use to transmit the PTRS to UE 120, in the available bandwidth for transmitting data) .
  • UE 120 may identify a CSI trigger state configuration associated with the CSI report request (e.g., by identifying information, included in the CSI report request, that specifies the CSI trigger state configuration, by receiving the CSI trigger state configuration in the CSI report request, and/or the like) ; may identify a triggering configuration, associated with the CSI report request, included in the CSI trigger state configuration; may identify a CSI report configuration and at least one of a reference frequency configuration and/or a PTRS configuration associated with the triggering configuration; and may generate the CSI report based at least in part on the CSI report configuration and the reference frequency configuration and/or the PTRS configuration.
  • a CSI trigger state configuration associated with the CSI report request (e.g., by identifying information, included in the CSI report request, that specifies the CSI trigger state configuration, by receiving the CSI trigger state configuration in the CSI report request, and/or the like)
  • UE 120 may transmit the CSI report to BS 110, and BS 110 may receive the CSI report.
  • UE 120 may transmit, to BS 110, the CSI report based at least in part on generating the CSI report, based at least in part on receiving the CSI report request, and/or the like.
  • UE 120 may generate a CSI report based at least in part on the CSI report configuration, and the reference frequency configuration or the downlink PTRS configuration, and may transmit the CSI report to BS 110.
  • UE 120 may take into account a PTRS that included in a downlink overhead of a downlink of a connection between UE 120 and BS 110.
  • UE 120 may be capable of generating a more accurate CSI report than without having the reference frequency configuration and/or the PTRS configuration, which increases the efficiency of the downlink, increases throughput on the downlink, decreases the quantity of delayed and/or dropped downlink communications on the downlink, and/or the like.
  • Fig. 7 is provided as an example. Other examples are possible and may differ from what was described with respect to Fig. 7.
  • Fig. 8 is a diagram illustrating an example 800 of various configurations for channel state information reporting.
  • example 800 may include a CSI report configuration, a PTRS configuration, and a reference frequency configuration.
  • example 800 may include greater or fewer configurations.
  • example 800 may illustrate various configurations that a base station (e.g., BS 110) may transmit to a user equipment (e.g., UE 120) , and the user equipment may generate a CSI report based at least in part on the various configurations.
  • a base station e.g., BS 110
  • UE 120 user equipment
  • the CSI report configuration may specify one or more reporting bands, of the downlink of a connection between the base station and the user equipment, that the user equipment is to use to generate the CSI report.
  • the one or more reporting bands may include one or more sub-bands included in the downlink.
  • the one or more reporting bands may include sub-band 0 through sub-band 4.
  • the CSI report configuration may be associated with the PTRS configuration and the reference frequency configuration.
  • the PTRS configuration may specify a PTRS density of a PTRS transmitted on the downlink and/or an uplink, may specify whether the user equipment is to use the PTRS density to generate the CSI report, may specify whether the user equipment is to use the PTRS to determine phase noise estimation quality for mitigating phase noise and/or common mode phase errors in the downlink and/or the uplink, and/or the like.
  • the reference frequency configuration may specify a resource block selection of one or more resource blocks, included in each sub-band identified in the CSI reporting configuration, that the user equipment is to use for CSI computation.
  • the reference frequency configuration may specify that resource blocks 0, 2, and 3, of sub-band 0 through sub-band 4, are to be used by the user equipment forCSI computation.
  • Fig. 8 is provided as an example. Other examples are possible and may differ from what was described with respect to Fig. 8.
  • Fig. 9 is a diagram illustrating various example CSI trigger state configurations, such as a CSI trigger state configuration 900 and a CSI trigger state configuration 910.
  • CSI trigger state configuration 900 and a CSI trigger state configuration 910 may each include one or more triggering configurations, one or more reference frequency configurations, one or more CSI report configurations, one or more PTRS configurations, and/or the like.
  • CSI trigger state configuration 900 and CSI trigger state configuration 910 are examples, and greater, fewer, and/or different configurations may be included in CSI trigger state configuration 900 and/or CSI trigger state configuration 910.
  • CSI trigger state configuration 900 and CSI trigger state configuration 910 may include different triggering configurations (e.g., CSI trigger state configuration 900 may include triggering configuration 0 and triggering configuration 1, CSI trigger state configuration 910 may include triggering configuration2 and triggering configuration 3, and/or the like) . However, CSI trigger state configuration 900 and CSI trigger state configuration 910 may include the same triggering configuration, different triggering configurations, and/or the like.
  • each triggering configuration may include a CSI report configuration and at least one of a reference frequency configuration and/or a PTRS configuration.
  • triggering configuration 0 may include CSI report configuration 0, reference frequency configuration 0, and PTRS configuration 0;
  • triggering configuration 1 may include CSI report configuration 1, reference frequency configuration 0, and PTRS configuration 1;
  • triggering configuration 2 may include CSI report configuration 0, reference frequency configuration 1, and PTRS configuration 2;
  • triggering configuration 3 may include CSI report configuration 1, reference frequency configuration 2, and PTRS configuration 0; and or the like. Accordingly, and as illustrated in Fig.
  • the triggering configurations included in a CSI trigger state configuration may include the same CSI report configurations and/or different CSI report configurations, may include the same reference frequency configurations and/or different reference frequency configurations, may include the same PTRS configurations and/or different PTRS configurations, and/or the like.
  • triggering configuration included in different CSI trigger state configurations may include the same CSI report configurations and/or different CSI report configurations, may include the same reference frequency configurations and/or different reference frequency configurations, may include the same PTRS configurations and/or different PTRS configurations, and/or the like.
  • Fig. 9 is provided as an example. Other examples are possible and may differ from what was described with respect to Fig. 9.
  • Fig. 10 is a diagram illustrating an example process 1000performed, for example, by a user equipment (UE) , in accordance with various aspects of the present disclosure.
  • Example process 1000 is an example where a UE (e.g., UE 120) performs channel state information reporting.
  • UE user equipment
  • process 1000 may include receiving, from a base station (BS) a channel state information (CSI) report configuration, and at least one of a reference frequency configuration associated with the CSI report configuration, or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration (block 1010) .
  • the UE e.g., using receive processor 258, controller/processor 280, memory 282, and/or the like
  • BS base station
  • CSI channel state information
  • PTRS downlink phase tracking reference signal
  • process 1000 may include generating a CSI report based at least in part on the CSI report configuration, and the reference frequency configuration, or the downlink PTRS configuration (block 1020) .
  • the UE e.g., using controller/processor 280, memory 282, and/or the like
  • process 1000 may include transmitting the CSI report to the BS (block 1030) .
  • the UE e.g., using transmit processor 264, controller/processor 280, memory 282, and/or the like
  • Process1000 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the UE when receiving at least one of the reference frequency configuration or the downlink PTRS configuration, the UE may be configured to receive both the reference frequency configuration and the downlink PTRS configuration.
  • the UE when generating the CSI report, the UE may be configured to generate the CSI report based at least in part on the CSI report configuration, the reference frequency configuration, and the downlink PTRS configuration.
  • the reference frequency configuration may comprise information identifying a reference bandwidth.
  • the information, identifying the reference bandwidth may specify a quantity of resource blocks.
  • the reference frequency configuration may comprise information identifying a plurality of reference bandwidths.
  • the information, identifying the plurality of reference bandwidths may specify a quantity of resource blocks for each reference bandwidth of the plurality of reference bandwidths.
  • the information, identifying the plurality of reference bandwidths may specify for a reference bandwidth, of the plurality of reference bandwidths, one or more resource blocks, of a plurality of resource blocks, associated with the reference bandwidth.
  • the downlink PTRS configuration may comprise information identifying a downlink PTRS density.
  • the UE when receiving the CSI report configuration, may be configured to receive a plurality of CSI report configurations, wherein the CSI report configuration is included in the plurality of CSI report configurations, and wherein at least one of the reference frequency configuration, associated with the CSI report configuration, is different from another reference frequency configuration associated with another CSI report configuration that is included in the plurality of CSI report configurations, or the downlink PTRS configuration, associated with the CSI report configuration, is different from another downlink PTRS configuration associated with another CSI report configuration that is included in the plurality of CSI report configurations.
  • the UE when receiving the CSI report configuration, may be configured to receive a plurality of CSI report configurations, wherein the CSI report configuration is included in the plurality of CSI report configurations; the UE may be configured to receive a plurality of CSI trigger state configurations, wherein each CSI trigger state configuration, of the plurality of CSI trigger state configurations, includes a plurality of triggering configurations, and wherein each triggering configuration, of the plurality of triggering configurations, is associated with a respective CSI report configuration of the plurality of CSI report configurations, and at least one of a respective reference frequency configuration, of a plurality of reference frequency configurations, or a respective downlink PTRS configuration, of a plurality of downlink PTRS configurations; the UE may be configured to receive a CSI report request from the BS; the UE may be configured to identify, based at least in part on receiving the CSI report request, a CSI trigger state configuration of the plurality of CSI trigger state configuration
  • the CSI report request may comprise at least one of an aperiodic CSI report request, or a semi-persistent CSI report request.
  • the UE maybe configured to receive an aperiodic CSI report request, wherein the aperiodic CSI report request identifies a triggering configuration of a plurality of triggering configurations, wherein the CSI report configuration is associated with the triggering configuration, and another triggering configuration of the plurality of triggering configurations, and wherein the CSI report configuration, in the other triggering configuration, is associated with at least one of another reference frequency configuration that is different from the reference frequency configuration, or another downlink PTRS configuration that is different from the downlink PTRS configurations; and when generating the CSI report, the UE may be configured to generate the CSI report based at least in part on the triggering configuration identified in the aperiodic CSI report request.
  • the UE when generating the CSI report, may be configured to identify, based at least in part on a CSI report request, the CSI report configuration of a plurality of CSI report configurations, and may be configured to generate the CSI report based at least in part on the CSI report configuration.
  • the CSI report configuration may comprise at least one of an ultra reliable low latency communications (URLLC) based CSI report configuration, or an enhanced mobile broadband (eMBB) based CSI report configuration.
  • URLLC ultra reliable low latency communications
  • eMBB enhanced mobile broadband
  • the URLLC based CSI report configuration is associated with a first plurality of PTRS configurations, wherein the eMBB based CSI report configuration is associated with a second plurality of downlink PTRS configurations, and wherein the first plurality of downlink PTRS configurations is different from the second plurality of downlink PTRS configurations.
  • the UE when receiving the downlink PTRS configuration, the UE may be configured to receive the downlink PTRS configuration in at least one of a downlink control indicator (DCI) communication, or a radio resource control (RRC) configuration communication.
  • DCI downlink control indicator
  • RRC radio resource control
  • process 1000 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 10. Additionally, or alternatively, two or more of the blocks of process 1000may be performed in parallel.
  • Fig. 11 is a diagram illustrating an example process 1100 performed, for example, by a base station (BS) , in accordance with various aspects of the present disclosure.
  • Example process 1100 is an example where a BS (e.g., BS 110) performs channel state information reporting.
  • BS e.g., BS 110
  • process 1100 may include transmitting, to a user equipment (UE) , a channel state information (CSI) report configuration, and at least one of a reference frequency configuration associated with the CSI report configuration, or a downlink phase tracking reference signal (PTRS) configuration associated with the CSI report configuration (block 1110) .
  • the BS e.g., using transmit processor 220, controller/processor 240, memory 242, and/or the like
  • process 1100 may include receiving, based at least in part on transmitting the CSI report configuration and the at least one of the reference frequency configuration or the downlink PTRS configuration to the UE, a CSI report from the UE, wherein the CSI report is based at least in part on the CSI report configuration, and the reference frequency configuration, or the downlink PTRS configuration (block 1120) .
  • the BS may receive, based at least in part on transmitting the CSI report configuration and the at least one of the reference frequency configuration or the downlink PTRS configuration to the UE, a CSI report from the UE, as described above.
  • the CSI report may be based at least in part on the CSI report configuration, and the reference frequency configuration or the downlink PTRS configuration.
  • Process 1100 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the BS when transmitting at least one of the reference frequency configuration or the downlink PTRS configuration, the BS may be configured to transmit both the reference frequency configuration and the downlink PTRS configuration.
  • the CSI report may be based at least in part on the CSI report configuration, the reference frequency configuration, and the downlink PTRS configuration.
  • the reference frequency configuration may comprise information identifying a reference bandwidth.
  • the information, identifying the reference bandwidth may specify a quantity of resource blocks.
  • the reference frequency configuration may comprise information identifying a plurality of reference bandwidths.
  • the information, identifying the plurality of reference bandwidths may specify a quantity of resource blocks for each reference bandwidth of the plurality of reference bandwidths.
  • the information, identifying the plurality of reference bandwidths may specify for a reference bandwidth, of the plurality of reference bandwidths, one or more resource blocks, of a plurality of resource blocks, associated with the reference bandwidth.
  • the downlink PTRS configuration may comprise information identifying a downlink PTRS density.
  • the BS when transmitting the CSI report configuration, may be configured to transmit a plurality of CSI report configurations, wherein the CSI report configuration is included in the plurality of CSI report configurations, and wherein at least one of the reference frequency configuration, associated with the CSI report configuration, is different from another reference frequency configuration associated with another CSI report configuration that is included in the plurality of CSI report configurations, or the downlink PTRS configuration, associated with the CSI report configuration, is different from another downlink PTRS configuration associated with another CSI report configuration that is included in the plurality of CSI report configurations.
  • the BS when transmitting the CSI report configuration, may be configured to transmit a plurality of CSI report configurations, wherein the CSI report configuration is included in the plurality of CSI report configurations; the BS may be configured to transmit a plurality of CSI trigger state configurations to the UE, wherein each CSI trigger state configuration, of the plurality of CSI trigger state configurations, includes a plurality of triggering configurations, and wherein each triggering configuration, of the plurality of triggering configurations, is associated with a respective CSI report configuration of the plurality of CSI report configurations, and at least one of a respective reference frequency configuration, of a plurality of reference frequency configurations, or a respective downlink PTRS configuration, of a plurality of downlink PTRS configurations, and transmit a CSI report request to the UE; and when receiving the CSI report, the BS may be configured to receive the CSI report based at least in part on transmitting the CSI report request, wherein the CSI
  • the CSI report request may comprise at least one of an aperiodic CSI report request, or a semi-persistent CSI report request.
  • the BS may be configured to transmit an aperiodic CSI report request to the UE, wherein the aperiodic CSI report request identifies a triggering configuration of a plurality of triggering configurations, wherein the CSI report configuration is associated with the triggering configuration, and another triggering configuration of the plurality of triggering configurations, and wherein the CSI report configuration, in the other triggering configuration, is associated with at least one of another reference frequency configuration that is different from the reference frequency configuration, or another downlink PTRS configuration that is different from the downlink PTRS configurations; and when receiving the CSI report, the BS may be configured to receive the CSI report based at least in part on transmitting the aperiodic CSI report request, wherein the CSI report is based at least in part on the triggering
  • the CSI report configuration may comprise at least one of an ultra reliable low latency communications (URLLC) based CSI report configuration, or an enhanced mobile broadband (eMBB) based CSI report configuration.
  • URLLC ultra reliable low latency communications
  • eMBB enhanced mobile broadband
  • the URLLC based CSI report configuration may be associated with a first plurality of PTRS configurations, wherein the eMBB based CSI report configuration may be associated with a second plurality of downlink PTRS configurations, and wherein the first plurality of downlink PTRS configurations may be different from the second plurality of downlink PTRS configurations.
  • the BS when transmitting the downlink PTRS configuration, may be configured to transmit the downlink PTRS configuration in at least one of a downlink control indicator (DCI) communication, or a radio resource control (RRC) configuration communication.
  • DCI downlink control indicator
  • RRC radio resource control
  • process 1100 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 11. Additionally, or alternatively, two or more of the blocks of process 1100 may be performed in parallel.
  • Fig. 12 is a diagram illustrating an example process 1200 performed, for example, by a user equipment (UE) , in accordance with various aspects of the present disclosure.
  • Example process 1200 is an example where a UE (e.g., UE 120) performs channel state information reporting.
  • UE user equipment
  • process 1200 may include receiving, from a base station (BS) , at least one of a first downlink phase tracking reference signal (PTRS) configuration and a second downlink PTRS configuration, or an uplink PTRS configuration, wherein the first downlink PTRS configuration is associated with an enhanced mobile broadband (eMBB) based channel state information (CSI) report configuration, and the second downlink PTRS configuration is associated with an ultra reliable low latency communications (URLLC) based CSI report configuration, wherein the first downlink PTRS configuration is associated with an eMBB based physical downlink shared channel (PDSCH) configuration, and the second downlink PTRS configuration is associated with a URLLC based PDSCH configuration, and wherein the uplink PTRS configuration is associated with an eMBB based physical uplink shared channel (PUSCH) configuration and a URLLC based PUSCH configuration (block 1210) .
  • eMBB enhanced mobile broadband
  • URLLC ultra reliable low latency communications
  • the UE may receive, from a base station (BS) , at least one of a first downlink phase tracking reference signal (PTRS) configuration and a second downlink PTRS configuration, or an uplink PTRS configuration, as described above.
  • a base station BS
  • the first downlink PTRS configuration may be associated with an enhanced mobile broadband (eMBB) based channel state information (CSI) report configuration
  • the second downlink PTRS configuration is associated with an ultra reliable low latency communications (URLLC) based CSI report configuration.
  • eMBB enhanced mobile broadband
  • URLLC ultra reliable low latency communications
  • the first downlink PTRS configuration may be associated with an eMBB based physical downlink shared channel (PDSCH) configuration
  • the second downlink PTRS configuration is associated with a URLLC based PDSCH configuration
  • the uplink PTRS configuration is associated with an eMBB based physical uplink shared channel (PUSCH) configuration and a URLLC based PUSCH configuration.
  • PUSCH physical uplink shared channel
  • process 1200 may at least one of configuring CSI reporting, for the UE, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration (block 1220) , configuring downlink communications, for the UE, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration (block 1230) , or configuring uplink communications, for the UE, based at least in part on the uplink PTRS configuration (block 1240) .
  • the UE may, at least one of, configure CSI reporting, for the UE, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration, configure downlink communications, for the UE, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration, or configure uplink communications, for the UE, based at least in part on the uplink PTRS configuration, as described above.
  • configure CSI reporting for the UE, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration
  • configure downlink communications for the UE, based at least in part on the first downlink PTRS configuration and the second downlink PTRS configuration
  • uplink communications for the UE, based at least in part on the uplink PTRS configuration, as described above.
  • Process 1200 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein. Although Fig. 12shows example blocks of process 1200, in some aspects, process 1200 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 12. Additionally, or alternatively, two or more of the blocks of process 1200may be performed in parallel.
  • the term component is intended to be broadly construed as hardware, firmware, or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, or a combination of hardware and software.
  • satisfying a threshold may refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .

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Abstract

Divers aspects de la présente invention concernent de manière générale la communication sans fil. Selon certains aspects, un équipement utilisateur (UE) peut recevoir, en provenance d'une station de base (BS), une configuration de rapport d'informations d'état de canal (CSI) et une configuration de fréquence de référence associée à la configuration de rapport de CSI, et/ou une configuration de signal de référence de suivi de phase de liaison descendante (PTRS) associée à la configuration de rapport de CSI. L'UE peut générer un rapport de CSI sur la base, au moins en partie, de la configuration de rapport de CSI, et de la configuration de fréquence de référence, ou de la configuration de PTRS de liaison descendante. L'UE peut transmettre le rapport de CSI à la BS. L'invention décrit également de nombreux autres aspects.
PCT/CN2018/108064 2018-09-27 2018-09-27 Rapport d'informations d'état de canal WO2020061938A1 (fr)

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