WO2020029273A1 - Traitement de collision pour rapport d'informations d'état de canal et données de liaison montante - Google Patents

Traitement de collision pour rapport d'informations d'état de canal et données de liaison montante Download PDF

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Publication number
WO2020029273A1
WO2020029273A1 PCT/CN2018/100045 CN2018100045W WO2020029273A1 WO 2020029273 A1 WO2020029273 A1 WO 2020029273A1 CN 2018100045 W CN2018100045 W CN 2018100045W WO 2020029273 A1 WO2020029273 A1 WO 2020029273A1
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WO
WIPO (PCT)
Prior art keywords
csi report
transmission
data
scheduled
grant
Prior art date
Application number
PCT/CN2018/100045
Other languages
English (en)
Inventor
Chenxi HAO
Yu Zhang
Yi Huang
Amir Aminzadeh Gohari
Wanshi Chen
Peter Gaal
Original Assignee
Qualcomm Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2018/100045 priority Critical patent/WO2020029273A1/fr
Priority to PCT/CN2019/099189 priority patent/WO2020029900A1/fr
Publication of WO2020029273A1 publication Critical patent/WO2020029273A1/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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows

Definitions

  • aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for collision handling for channel state information (CSI) reports and uplink (UL) data.
  • CSI channel state information
  • UL uplink
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These 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, etc. ) .
  • available system resources e.g., bandwidth, transmit power, etc.
  • multiple-access systems examples include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE Advanced (LTE-A) systems, 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, and time division synchronous code division multiple access (TD-SCDMA) systems, to name a few.
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • LTE-A LTE Advanced
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • a wireless multiple-access communication system may include a number of base stations (BSs) , which are each capable of simultaneously supporting communication for multiple communication devices, otherwise known as user equipments (UEs) .
  • BSs base stations
  • UEs user equipments
  • a set of one or more base stations may define an eNodeB (eNB) .
  • eNB eNodeB
  • a wireless multiple access communication system may include a number of distributed units (DUs) (e.g., edge units (EUs) , edge nodes (ENs) , radio heads (RHs) , smart radio heads (SRHs) , transmission reception points (TRPs) , etc.
  • DUs distributed units
  • EUs edge units
  • ENs edge nodes
  • RHs radio heads
  • SSRHs smart radio heads
  • TRPs transmission reception points
  • CUs central units
  • CNs central nodes
  • ANCs access node controllers
  • a base station or distributed unit may communicate with a set of UEs on downlink channels (e.g., for transmissions from a base station or to a UE) and uplink channels (e.g., for transmissions from a UE to a base station or distributed unit) .
  • New Radio (e.g., 5G) is an example of an emerging telecommunication standard.
  • NR is a set of enhancements to the LTE mobile standard promulgated by 3GPP. It 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 OFDMA with a cyclic prefix (CP) on the downlink (DL) and on the uplink (UL) .
  • CP cyclic prefix
  • NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • MIMO multiple-input multiple-output
  • Certain aspects provide a method for wireless communications in a network by a user equipment (UE) .
  • the method generally includes receiving a channel state information (CSI) report trigger that schedules the wireless device to transmit a CSI report and an uplink (UL) grant that schedules the wireless device to transmit UL data, determining, based on the CSI report trigger and the UL grant, that transmission of the CSI report and the UL data will collide, deciding, based on at least one of an indication of a relative timing between the CSI report transmission and the UL data transmission or an indication of a type of CSI report to be transmitted, to drop one of the CSI report or the UL data from transmission, and transmitting one of the CSI report or the UL data based on the decision.
  • CSI channel state information
  • UL uplink
  • the apparatus generally includes at least one processor configured to receive a channel state information (CSI) report trigger that schedules the wireless device to transmit a CSI report and an uplink (UL) grant that schedules the wireless device to transmit UL data, determine, based on the CSI report trigger and the UL grant, that transmission of the CSI report and the UL data will collide, decide, based on at least one of an indication of a relative timing between the CSI report transmission and the UL data transmission or an indication of a type of CSI report to be transmitted, to drop one of the CSI report or the UL data from transmission, and transmit one of the CSI report or the UL data based on the decision.
  • the apparatus also generally includes a memory coupled with the at least one processor.
  • the apparatus generally includes means for receiving a channel state information (CSI) report trigger that schedules the wireless device to transmit a CSI report and an uplink (UL) grant that schedules the wireless device to transmit UL data, means for determining, based on the CSI report trigger and the UL grant, that transmission of the CSI report and the UL data will collide, means for deciding, based on at least one of an indication of a relative timing between the CSI report transmission and the UL data transmission or an indication of a type of CSI report to be transmitted, to drop one of the CSI report or the UL data from transmission, and means for transmitting one of the CSI report or the UL data based on the decision.
  • CSI channel state information
  • UL uplink
  • Non-transitory computer-readable medium for wireless communications in a network by a user equipment (UE) .
  • the non-transitory computer-readable medium generally includes instructions that, when executed by at least one processor, configure the at least one processor to receive a channel state information (CSI) report trigger that schedules the wireless device to transmit a CSI report and an uplink (UL) grant that schedules the wireless device to transmit UL data, determine, based on the CSI report trigger and the UL grant, that transmission of the CSI report and the UL data will collide, decide, based on at least one of an indication of a relative timing between the CSI report transmission and the UL data transmission or an indication of a type of CSI report to be transmitted, to drop one of the CSI report or the UL data from transmission, and transmit one of the CSI report or the UL data based on the decision.
  • CSI channel state information
  • UL uplink
  • Certain aspects provide a method for wireless communications in a network by a user equipment (UE) .
  • the method generally includes receiving a channel state information (CSI) report trigger that schedules the wireless device to transmit a CSI report and an uplink (UL) grant that schedules the wireless device to transmit UL data, determining, based on the CSI report trigger and the UL grant, that transmission of the CSI report and the UL data will collide, deciding whether to multiplex at least a portion of the CSI report with the UL data to form an UL transmission based on the determination that transmission of the CSI report and the UL data will collide, and transmitting the UL transmission the UL data, or the CSI report based on the decision.
  • CSI channel state information
  • UL uplink
  • the apparatus generally includes at least one processor configured to receive a channel state information (CSI) report trigger that schedules the wireless device to transmit a CSI report and an uplink (UL) grant that schedules the wireless device to transmit UL data, determine, based on the CSI report trigger and the UL grant, that transmission of the CSI report and the UL data will collide, decide whether to multiplex at least a portion of the CSI report with the UL data to form an UL transmission based on the determination that transmission of the CSI report and the UL data will collide, and transmit the UL transmission the UL data, or the CSI report based on the decision.
  • the apparatus also generally includes a memory coupled with the at least one processor.
  • the apparatus generally includes means for receiving a channel state information (CSI) report trigger that schedules the wireless device to transmit a CSI report and an uplink (UL) grant that schedules the wireless device to transmit UL data, means for determining, based on the CSI report trigger and the UL grant, that transmission of the CSI report and the UL data will collide, means for deciding whether to multiplex at least a portion of the CSI report with the UL data to form an UL transmission based on the determination that transmission of the CSI report and the UL data will collide, and means for transmitting the UL transmission the UL data, or the CSI report based on the decision.
  • CSI channel state information
  • UL uplink
  • Non-transitory computer-readable medium for wireless communications in a network by a user equipment (UE) .
  • the non-transitory computer-readable medium generally includes instructions that, when executed by at least one processor, configure the at least one processor to receive a channel state information (CSI) report trigger that schedules the wireless device to transmit a CSI report and an uplink (UL) grant that schedules the wireless device to transmit UL data, determine, based on the CSI report trigger and the UL grant, that transmission of the CSI report and the UL data will collide, decide whether to multiplex at least a portion of the CSI report with the UL data to form an UL transmission based on the determination that transmission of the CSI report and the UL data will collide, and transmit the UL transmission the UL data, or the CSI report based on the decision.
  • CSI channel state information
  • UL uplink
  • Certain aspects provide a method for wireless communications in a network by a base station (BS) .
  • the method generally includes transmitting a channel state information (CSI) report trigger that schedules a wireless device to transmit a CSI report at a first transmission slot and an uplink (UL) grant that schedules the wireless device to transmit UL data at the first transmission slot, identifying, based on the CSI report trigger and the UL grant, that a scheduled CSI report transmission and a scheduled UL data transmission will collide, determining, based on at least one of a relative timing between the scheduled CSI report transmission and the scheduled UL data transmission or an indication of a type of CSI report to be transmitted, which of the scheduled CSI report transmission or the scheduled UL data transmission will be dropped from an uplink (UL) transmission, and receiving one of the CSI report or the UL data based on the determination.
  • CSI channel state information
  • UL uplink
  • the apparatus generally includes at least one processor configured to transmit a channel state information (CSI) report trigger that schedules a wireless device to transmit a CSI report at a first transmission slot and an uplink (UL) grant that schedules the wireless device to transmit UL data at the first transmission slot, identify, based on the CSI report trigger and the UL grant, that a scheduled CSI report transmission and a scheduled UL data transmission will collide, determine, based on at least one of a relative timing between the scheduled CSI report transmission and the scheduled UL data transmission or an indication of a type of CSI report to be transmitted, which of the scheduled CSI report transmission or the scheduled UL data transmission will be dropped from an uplink (UL) transmission, and receive one of the CSI report or the UL data based on the determination.
  • the apparatus also generally includes a memory coupled with the at least one processor.
  • the apparatus generally includes means for transmitting a channel state information (CSI) report trigger that schedules a wireless device to transmit a CSI report at a first transmission slot and an uplink (UL) grant that schedules the wireless device to transmit UL data at the first transmission slot, means for identifying, based on the CSI report trigger and the UL grant, that a scheduled CSI report transmission and a scheduled UL data transmission will collide, means for determining, based on at least one of a relative timing between the scheduled CSI report transmission and the scheduled UL data transmission or an indication of a type of CSI report to be transmitted, which of the scheduled CSI report transmission or the scheduled UL data transmission will be dropped from an uplink (UL) transmission, and means for receiving one of the CSI report or the UL data based on the determination.
  • CSI channel state information
  • UL uplink
  • Non-transitory computer-readable medium for wireless communications in a network by a base station (BS) .
  • the non-transitory computer-readable medium generally includes instructions that, when executed by at least one processor, configure the at least one processor to transmit a channel state information (CSI) report trigger that schedules a wireless device to transmit a CSI report at a first transmission slot and an uplink (UL) grant that schedules the wireless device to transmit UL data at the first transmission slot, identify, based on the CSI report trigger and the UL grant, that a scheduled CSI report transmission and a scheduled UL data transmission will collide, determine, based on at least one of a relative timing between the scheduled CSI report transmission and the scheduled UL data transmission or an indication of a type of CSI report to be transmitted, which of the scheduled CSI report transmission or the scheduled UL data transmission will be dropped from an uplink (UL) transmission, and receive one of the CSI report or the UL data based on the determination.
  • CSI channel state information
  • UL uplink
  • Certain aspects provide a method for wireless communications in a network by a base station (BS) .
  • the method generally includes transmitting a channel state information (CSI) report trigger that schedules a wireless device to transmit a CSI report at a first transmission slot and an uplink (UL) grant that schedules the wireless device to transmit UL data at the first transmission slot, identifying, based on the CSI report trigger and the UL grant, that a scheduled CSI report transmission and a scheduled UL data transmission will collide, determining, based on one or more timing constraints and one or more resource constraints, whether a scheduled uplink (UL) transmission comprises one the scheduled UL data transmission, the scheduled CSI report transmission, or a multiplexed stream of bits comprising the scheduled UL data transmission and at least a portion of the scheduled CSI report transmission, and receiving, based on the determination, one of the scheduled UL data transmission, the scheduled CSI report transmission, or the multiplexed stream of bits comprising the scheduled UL data transmission and the at least a portion of the scheduled CSI report
  • the apparatus generally includes at least one processor configured to transmit a channel state information (CSI) report trigger that schedules a wireless device to transmit a CSI report at a first transmission slot and an uplink (UL) grant that schedules the wireless device to transmit UL data at the first transmission slot, identify, based on the CSI report trigger and the UL grant, that a scheduled CSI report transmission and a scheduled UL data transmission will collide, determine, based on one or more timing constraints and one or more resource constraints, whether a scheduled uplink (UL) transmission comprises one the scheduled UL data transmission, the scheduled CSI report transmission, or a multiplexed stream of bits comprising the scheduled UL data transmission and at least a portion of the scheduled CSI report transmission, and receive, based on the determination, one of the scheduled UL data transmission, the scheduled CSI report transmission, or the multiplexed stream of bits comprising the scheduled UL data transmission and the at least a portion of the scheduled CSI report transmission, and receive, based on the determination, one of the scheduled UL data transmission, the scheduled
  • the apparatus generally includes means for transmitting a channel state information (CSI) report trigger that schedules a wireless device to transmit a CSI report at a first transmission slot and an uplink (UL) grant that schedules the wireless device to transmit UL data at the first transmission slot, means for identifying, based on the CSI report trigger and the UL grant, that a scheduled CSI report transmission and a scheduled UL data transmission will collide, means for determining, based on one or more timing constraints and one or more resource constraints, whether a scheduled uplink (UL) transmission comprises one the scheduled UL data transmission, the scheduled CSI report transmission, or a multiplexed stream of bits comprising the scheduled UL data transmission and at least a portion of the scheduled CSI report transmission, and means for receiving, based on the determination, one of the scheduled UL data transmission, the scheduled CSI report transmission, or the multiplexed stream of bits comprising the scheduled UL data transmission and the at least a portion of the scheduled CSI report transmission, and means for receiving, based on the determination, one of the scheduled
  • Non-transitory computer-readable medium for wireless communications in a network by a base station (BS) .
  • the non-transitory computer-readable medium generally includes instructions that, when executed by at least one processor, configure the at least one processor to transmit a channel state information (CSI) report trigger that schedules a wireless device to transmit a CSI report at a first transmission slot and an uplink (UL) grant that schedules the wireless device to transmit UL data at the first transmission slot, identify, based on the CSI report trigger and the UL grant, that a scheduled CSI report transmission and a scheduled UL data transmission will collide, determine, based on one or more timing constraints and one or more resource constraints, whether a scheduled uplink (UL) transmission comprises one the scheduled UL data transmission, the scheduled CSI report transmission, or a multiplexed stream of bits comprising the scheduled UL data transmission and at least a portion of the scheduled CSI report transmission, and receive, based on the determination, one of the scheduled UL data transmission, the scheduled CSI report transmission, or the CSI
  • the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.
  • the following description and the appended drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed.
  • FIG. 1 is a block diagram conceptually illustrating an example telecommunications system, in accordance with certain aspects of the present disclosure.
  • FIG. 2 is a block diagram illustrating an example logical architecture of a distributed radio access network (RAN) , in accordance with certain aspects of the present disclosure.
  • RAN radio access network
  • FIG. 3 is a diagram illustrating an example physical architecture of a distributed RAN, in accordance with certain aspects of the present disclosure.
  • FIG. 4 is a block diagram conceptually illustrating a design of an example base station (BS) and user equipment (UE) , in accordance with certain aspects of the present disclosure.
  • BS base station
  • UE user equipment
  • FIG. 5 is a diagram showing examples for implementing a communication protocol stack, in accordance with certain aspects of the present disclosure.
  • FIG. 6 illustrates an example of a frame format for a new radio (NR) system, in accordance with certain aspects of the present disclosure.
  • NR new radio
  • FIG. 7 illustrates example collision scenarios between a channel state information report and uplink data, in accordance with certain aspects of the present disclosure.
  • FIG. 8 illustrates example operations for wireless communications by a user equipment, in accordance with certain aspects of the present disclosure.
  • FIG. 8A illustrates example operations for wireless communications by a base station, in accordance with certain aspects of the present disclosure.
  • FIG. 9 illustrates example timing scenarios for reception of a channel state information report trigger and an uplink grant, in accordance with certain aspects of the present disclosure.
  • FIG. 10 illustrates example operations for wireless communications by a user equipment, in accordance with certain aspects of the present disclosure.
  • FIG. 10A illustrates example operations for wireless communications by a base station, in accordance with certain aspects of the present disclosure.
  • FIG. 11 illustrates example scenarios for multiplexing channel state information report with uplink data, in accordance with certain aspects of the present disclosure.
  • FIG. 12 illustrates example scenarios for dropping from transmission uplink data, in accordance with certain aspects of the present disclosure.
  • FIG. 13 illustrates a communications device that may include various components configured to perform operations for the techniques disclosed herein in accordance with aspects of the present disclosure.
  • FIG. 14 illustrates a communications device that may include various components configured to perform operations for the techniques disclosed herein in accordance with aspects of the present disclosure.
  • aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for collision handling for channel state information (CSI) reporting and uplink (UL) data.
  • CSI channel state information
  • UL uplink
  • a CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA) , cdma2000, etc.
  • UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • cdma2000 covers IS-2000, IS-95 and IS-856 standards.
  • a TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM) .
  • An OFDMA network may implement a radio technology such as NR (e.g.
  • E-UTRA Evolved UTRA
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 Flash-OFDMA
  • UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS) .
  • New Radio is an emerging wireless communications technology under development in conjunction with the 5G Technology Forum (5GTF) .
  • 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are releases of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP) .
  • cdma2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • the techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, while 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.
  • New radio (NR) access may support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or beyond) , millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or beyond) , massive machine type communications MTC (mMTC) targeting non-backward compatible MTC techniques, and/or mission critical targeting ultra-reliable low-latency communications (URLLC) .
  • eMBB enhanced mobile broadband
  • mmW millimeter wave
  • mMTC massive machine type communications MTC
  • URLLC ultra-reliable low-latency communications
  • These services may include latency and reliability requirements.
  • These services may also have different transmission time intervals (TTI) to meet respective quality of service (QoS) requirements.
  • TTI transmission time intervals
  • QoS quality of service
  • these services may co-exist in the same subframe.
  • FIG. 1 illustrates an example wireless communication network 100 in which aspects of the present disclosure may be performed.
  • the wireless communication network 100 may be aNew Radio (NR) or 5G network.
  • NR New Radio
  • 5G 5th Generation
  • the wireless network 100 may include a number of base stations (BSs) 110 and other network entities.
  • a BS may be a station that communicates with user equipments (UEs) .
  • Each BS 110 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a Node B (NB) and/or a Node B subsystem serving this coverage area, depending on the context in which the term is used.
  • gNB next generation NodeB
  • NR BS new radio base station
  • 5G NB access point
  • AP access point
  • TRP transmission reception point
  • 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 base stations may be interconnected to one another and/or to one or more other base stations or network nodes (not shown) in wireless communication network 100 through various types of backhaul interfaces, such as a direct physical connection, a wireless connection, a virtual network, or the like using any suitable transport network.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, etc.
  • a frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, a subband, etc.
  • 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.
  • a base station may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or other types of cells.
  • 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 an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG) , UEs for users in the home, etc. ) .
  • CSG Closed Subscriber Group
  • a BS for a macro cell may be referred to as a macro BS.
  • ABS for a pico cell may be referred to as a pico BS.
  • ABS for a femto cell may be referred to as a femto BS or a home BS.
  • the BSs 110a, 110b and 110c may be macro BSs for the macro cells 102a, 102b and 102c, respectively.
  • the BS 110x may be a pico BS for a pico cell 102x.
  • the BSs 110y and 110z may be femto BSs for the femto cells 102y and 102z, respectively.
  • a BS may support one or multiple (e.g., three) cells.
  • Wireless communication network 100 may also include relay stations.
  • a relay station is a station that receives a transmission of data and/or other information from an upstream station (e.g., a BS or a UE) and sends a transmission of the data and/or other information to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that relays transmissions for other UEs.
  • a relay station 110r may communicate with the BS 110a and a UE 120r in order to facilitate communication between the BS 110a and the UE 120r.
  • a relay station may also be referred to as a relay BS, a relay, etc.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BS, pico BS, femto BS, relays, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different impact on interference in the wireless network 100.
  • macro BS may have a high transmit power level (e.g., 20 Watts) whereas pico BS, femto BS, and relays may have a lower transmit power level (e.g., 1 Watt) .
  • Wireless communication network 100 may support synchronous or asynchronous operation.
  • the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time.
  • the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time.
  • the techniques described herein may be used for both synchronous and asynchronous operation.
  • a network controller 130 may couple to a set of BSs and provide coordination and control for these BSs.
  • the network controller 130 may communicate with the BSs 110 via a backhaul.
  • the BSs 110 may also communicate with one another (e.g., directly or indirectly) via wireless or wireline backhaul.
  • the UEs 120 may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a Customer Premises Equipment (CPE) , a cellular phone, 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 computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, an appliance, a medical device or medical equipment, a biometric sensor/device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, smart jewelry (e.g., a smart ring, a smart bracelet, etc.
  • CPE Customer Premises Equipment
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC machine-type communication
  • eMTC evolved MTC
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that may communicate with a BS, 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.
  • a network e.g., a wide area network such as Internet or a cellular network
  • Some UEs may be considered Internet-of-Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.
  • IoT Internet-of-Things
  • NB-IoT narrowband IoT
  • Certain wireless networks utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single-carrier frequency division multiplexing (SC-FDM) on the uplink.
  • OFDM and SC-FDM partition the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc.
  • K orthogonal subcarriers
  • Each subcarrier may be modulated with data.
  • modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDM.
  • the spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may be dependent on the system bandwidth.
  • the spacing of the subcarriers may be 15 kHz and the minimum resource allocation (called a “resource block” (RB) ) may be 12 subcarriers (or 180 kHz) . Consequently, the nominal Fast Fourier Transfer (FFT) size may be equal to 128, 256, 512, 1024 or 2048 for system bandwidth of 1.25, 2.5, 5, 10, or 20 megahertz (MHz) , respectively.
  • the system bandwidth may also be partitioned into subbands. For example, a subband may cover 1.08 MHz (i.e., 6 resource blocks) , and there may be 1, 2, 4, 8, or 16 subbands for system bandwidth of 1.25, 2.5, 5, 10 or 20 MHz, respectively.
  • NR may utilize OFDM with a CP on the uplink and downlink and include support for half-duplex operation using TDD. Beamforming may be supported and beam direction may be dynamically configured. MIMO transmissions with precoding may also be supported. MIMO configurations in the DL may support up to 8 transmit antennas with multi-layer DL transmissions up to 8 streams and up to 2 streams per UE. Multi-layer transmissions with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported with up to 8 serving cells.
  • a scheduling entity e.g., a base station
  • the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, subordinate entities utilize resources allocated by the scheduling entity.
  • Base stations are not the only entities that may function as a scheduling entity.
  • a UE may function as a scheduling entity and may schedule resources for one or more subordinate entities (e.g., one or more other UEs) , and the other UEs may utilize the resources scheduled by the UE for wireless communication.
  • a UE may function as a scheduling entity in a peer-to-peer (P2P) network, and/or in a mesh network.
  • P2P peer-to-peer
  • UEs may communicate directly with one another in addition to communicating with a scheduling entity.
  • a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designated to serve the UE on the downlink and/or uplink.
  • a finely dashed line with double arrows indicates interfering transmissions between a UE and a BS.
  • FIG. 2 illustrates an example logical architecture of a distributed Radio Access Network (RAN) 200, which may be implemented in the wireless communication network 100 illustrated in FIG. 1.
  • a 5G access node 206 may include an access node controller (ANC) 202.
  • ANC 202 may be a central unit (CU) of the distributed RAN 200.
  • the backhaul interface to the Next Generation Core Network (NG-CN) 204 may terminate at ANC 202.
  • the backhaul interface to neighboring next generation access Nodes (NG-ANs) 210 may terminate at ANC 202.
  • ANC 202 may include one or more transmission reception points (TRPs) 208 (e.g., cells, BSs, gNBs, etc. ) .
  • TRPs transmission reception points
  • the TRPs 208 may be a distributed unit (DU) .
  • TRPs 208 may be connected to a single ANC (e.g., ANC 202) or more than one ANC (not illustrated) .
  • a single ANC e.g., ANC 202
  • ANC e.g., ANC 202
  • RaaS radio as a service
  • TRPs 208 may be connected to more than one ANC.
  • TRPs 208 may each include one or more antenna ports.
  • TRPs 208 may be configured to individually (e.g., dynamic selection) or jointly (e.g., joint transmission) serve traffic to a UE.
  • the logical architecture of distributed RAN 200 may support fronthauling solutions across different deployment types.
  • the logical architecture may be based on transmit network capabilities (e.g., bandwidth, latency, and/or jitter) .
  • next generation access node (NG-AN) 210 may support dual connectivity with NR and may share a common fronthaul for LTE and NR.
  • NG-AN next generation access node
  • the logical architecture of distributed RAN 200 may enable cooperation between and among TRPs 208, for example, within a TRP and/or across TRPs via ANC 202.
  • An inter-TRP interface may not be used.
  • Logical functions may be dynamically distributed in the logical architecture of distributed RAN 200.
  • the Radio Resource Control (RRC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, Medium Access Control (MAC) layer, and a Physical (PHY) layers may be adaptably placed at the DU (e.g., TRP 208) or CU (e.g., ANC 202) .
  • RRC Radio Resource Control
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • PHY Physical
  • FIG. 3 illustrates an example physical architecture of a distributed Radio Access Network (RAN) 300, according to aspects of the present disclosure.
  • a centralized core network unit (C-CU) 302 may host core network functions.
  • C-CU 302 may be centrally deployed.
  • C-CU 302 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) 304 may host one or more ANC functions.
  • the C-RU 304 may host core network functions locally.
  • the C-RU 304 may have distributed deployment.
  • the C-RU 304 may be close to the network edge.
  • a DU 306 may host one or more TRPs (Edge Node (EN) , an Edge Unit (EU) , a Radio Head (RH) , a Smart Radio Head (SRH) , or the like) .
  • the DU may be located at edges of the network with radio frequency (RF) functionality.
  • RF radio frequency
  • FIG. 4 illustrates example components of BS 110 and UE 120 (as depicted in FIG. 1) , which may be used to implement aspects of the present disclosure.
  • antennas 452, processors 466, 458, 464, and/or controller/processor 480 of the UE 120 and/or antennas 434, processors 420, 430, 438, and/or controller/processor 440 of the BS 110 may be used to perform the various techniques and methods described herein.
  • a transmit processor 420 may receive data from a data source 412 and control information from a controller/processor 440.
  • the control information may be for the physical broadcast channel (PBCH) , physical control format indicator channel (PCFICH) , physical hybrid ARQ indicator channel (PHICH) , physical downlink control channel (PDCCH) , group common PDCCH (GC PDCCH) , etc.
  • the data may be for the physical downlink shared channel (PDSCH) , etc.
  • the processor 420 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • the processor 420 may also generate reference symbols, e.g., for the primary synchronization signal (PSS) , secondary synchronization signal (SSS) , and cell-specific reference signal (CRS) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 430 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) 432a through 432t. Each modulator 432 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from modulators 432a through 432t may be transmitted via the antennas 434a through 434t, respectively.
  • the antennas 452a through 452r may receive the downlink signals from the base station 110 and may provide received signals to the demodulators (DEMODs) in transceivers 454a through 454r, respectively.
  • Each demodulator 454 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each demodulator may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 456 may obtain received symbols from all the demodulators 454a through 454r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 458 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 460, and provide decoded control information to a controller/processor 480.
  • a transmit processor 464 may receive and process data (e.g., for the physical uplink shared channel (PUSCH) ) from a data source 462 and control information (e.g., for the physical uplink control channel (PUCCH) from the controller/processor 480.
  • the transmit processor 464 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS) ) .
  • the symbols from the transmit processor 464 may be precoded by a TX MIMO processor 466 if applicable, further processed by the demodulators in transceivers 454a through 454r (e.g., for SC-FDM, etc. ) , and transmitted to the base station 110.
  • data e.g., for the physical uplink shared channel (PUSCH)
  • control information e.g., for the physical uplink control channel (PUCCH) from the controller/processor 480.
  • the transmit processor 464 may also generate reference symbols for a reference signal (e.g., for the
  • the uplink signals from the UE 120 may be received by the antennas 434, processed by the modulators 432, detected by a MIMO detector 436 if applicable, and further processed by a receive processor 438 to obtain decoded data and control information sent by the UE 120.
  • the receive processor 438 may provide the decoded data to a data sink 439 and the decoded control information to the controller/processor 440.
  • the controllers/processors 440 and 480 may direct the operation at the base station 110 and the UE 120, respectively.
  • the processor 440 and/or other processors and modules at the BS 110 may perform or direct the execution of processes for the techniques described herein.
  • the memories 442 and 482 may store data and program codes for BS 110 and UE 120, respectively.
  • a scheduler 444 may schedule UEs for data transmission on the downlink and/or uplink.
  • FIG. 5 illustrates a diagram 500 showing examples for implementing a communications protocol stack, according to aspects of the present disclosure.
  • the illustrated communications protocol stacks may be implemented by devices operating in a wireless communication system, such as a 5G system (e.g., a system that supports uplink-based mobility) .
  • Diagram 500 illustrates a communications protocol stack including a Radio Resource Control (RRC) layer 510, a Packet Data Convergence Protocol (PDCP) layer 515, a Radio Link Control (RLC) layer 520, a Medium Access Control (MAC) layer 525, and a Physical (PHY) layer 530.
  • RRC Radio Resource Control
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • PHY Physical
  • the layers of a protocol stack may be implemented as separate modules of software, portions of a processor or ASIC, portions of non-collocated devices connected by a communications link, or various combinations thereof. Collocated and non-collocated implementations may be used, for example, in a protocol stack for a network access device (e.g., ANs, CUs, and/or DUs) or a UE.
  • a network access device e.g., ANs, CUs, and/or DUs
  • a first option 505-a shows a split implementation of a protocol stack, in which implementation of the protocol stack is split between a centralized network access device (e.g., an ANC 202 in FIG. 2) and distributed network access device (e.g., DU 208 in FIG. 2) .
  • a centralized network access device e.g., an ANC 202 in FIG. 2
  • distributed network access device e.g., DU 208 in FIG. 2
  • an RRC layer 510 and a PDCP layer 515 may be implemented by the central unit
  • an RLC layer 520, a MAC layer 525, and a PHY layer 530 may be implemented by the DU.
  • the CU and the DU may be collocated or non-collocated.
  • the first option 505-a may be useful in a macro cell, micro cell, or pico cell deployment.
  • a second option 505-b shows a unified implementation of a protocol stack, in which the protocol stack is implemented in a single network access device.
  • RRC layer 510, PDCP layer 515, RLC layer 520, MAC layer 525, and PHY layer 530 may each be implemented by the AN.
  • the second option 505-b may be useful in, for example, a femto cell deployment.
  • a UE may implement an entire protocol stack as shown in 505-c (e.g., the RRC layer 510, the PDCP layer 515, the RLC layer 520, the MAC layer 525, and the PHY layer 530) .
  • the basic transmission time interval (TTI) or packet duration is the 1 ms subframe.
  • a subframe is still 1 ms, but the basic TTI is referred to as a slot.
  • a subframe contains a variable number of slots (e.g., 1, 2, 4, 8, 16, ...slots) depending on the subcarrier spacing.
  • the NR RB is 12 consecutive frequency subcarriers.
  • NR may support a base subcarrier spacing of 15 KHz and other subcarrier spacing may be defined with respect to the base subcarrier spacing, for example, 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc.
  • the symbol and slot lengths scale with the subcarrier spacing.
  • the CP length also depends on the subcarrier spacing.
  • FIG. 6 is a diagram showing an example of a frame format 600 for NR.
  • the transmission timeline for each of the downlink and uplink may be partitioned into units of radio frames.
  • Each radio frame may have a predetermined duration (e.g., 10 ms) and may be partitioned into 10 subframes, each of 1 ms, with indices of 0 through 9.
  • Each subframe may include a variable number of slots depending on the subcarrier spacing.
  • Each slot may include a variable number of symbol periods (e.g., 7 or 14 symbols) depending on the subcarrier spacing.
  • the symbol periods in each slot may be assigned indices.
  • a mini-slot which may be referred to as a sub-slot structure, refers to a transmit time interval having a duration less than a slot (e.g., 2, 3, or 4 symbols) .
  • Each symbol in a slot may indicate a link direction (e.g., DL, UL, or flexible) for data transmission and the link direction for each subframe may be dynamically switched.
  • the link directions may be based on the slot format.
  • Each slot may include DL/UL data as well as DL/UL control information.
  • a synchronization signal (SS) block is transmitted.
  • the SS block includes a PSS, a SSS, and a two symbol PBCH.
  • the SS block can be transmitted in a fixed slot location, such as the symbols 0-3 as shown in FIG. 6.
  • the PSS and SSS may be used by UEs for cell search and acquisition.
  • the PSS may provide half-frame timing, the SS may provide the CP length and frame timing.
  • the PSS and SSS may provide the cell identity.
  • the PBCH carries some basic system information, such as downlink system bandwidth, timing information within radio frame, SS burst set periodicity, system frame number, etc.
  • the SS blocks may be organized into SS bursts to support beam sweeping.
  • Further system information such as, remaining minimum system information (RMSI) , system information blocks (SIBs) , other system information (OSI) can be transmitted on a physical downlink shared channel (PDSCH) in certain subframes.
  • the SS block may be transmitted up to sixty-four times, for example, with up to sixty-four different beam directions for mmW.
  • the up to sixty-four transmissions of the SS block are referred to as the SS burst set.
  • two or more subordinate entities may communicate with each other using sidelink signals.
  • Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh, and/or various other suitable applications.
  • a sidelink signal may refer to a signal communicated from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying that communication through the scheduling entity (e.g., UE or BS) , even though the scheduling entity may be utilized for scheduling and/or control purposes.
  • the sidelink signals may be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum) .
  • a UE may operate in various radio resource configurations, including a configuration associated with transmitting pilots using a dedicated set of resources (e.g., a radio resource control (RRC) dedicated state, etc. ) or a configuration associated with transmitting pilots using a common set of resources (e.g., an RRC common state, etc. ) .
  • RRC radio resource control
  • the UE may select a dedicated set of resources for transmitting a pilot signal to a network.
  • the UE may select a common set of resources for transmitting a pilot signal to the network.
  • a pilot signal transmitted by the UE may be received by one or more network access devices, such as an AN, or a DU, or portions thereof.
  • Each receiving network access device may be configured to receive and measure pilot signals transmitted on the common set of resources, and also receive and measure pilot signals transmitted on dedicated sets of resources allocated to the UEs for which the network access device is a member of a monitoring set of network access devices for the UE.
  • One or more of the receiving network access devices, or a CU to which receiving network access device (s) transmit the measurements of the pilot signals may use the measurements to identify serving cells for the UEs, or to initiate a change of serving cell for one or more of the UEs.
  • Channel state information may refer to known channel properties of a communication link and may represent the combined effects of, for example, scattering, fading, and power decay with distance between a transmitter and receiver.
  • channel estimation may be performed to determine these effects on the channel.
  • CSI may be used to adapt transmissions based on the current channel conditions, which is useful for achieving reliable communication, in particular, with high data rates in multi-antenna systems.
  • CSI is typically estimated at the receiver, quantized, and fed back to the transmitter as a CSI report.
  • CSI may include a Channel Quality Indicator (CQI) , a precoding matrix indicator (PMI) , a CSI-RS resource indicator (CRI) , a SS/PBCH Block Resource indicator (SSBRI) , a layer indicator (LI) , a rank indicator (RI) and/or L1-RSRP.
  • CQI Channel Quality Indicator
  • PMI precoding matrix indicator
  • CRI CSI-RS resource indicator
  • SSBRI SS/PBCH Block Resource indicator
  • LI layer indicator
  • RI rank indicator
  • L1-RSRP L1-RSRP
  • CSI reports may be transmitted by a user equipment (UE) and carried via a physical uplink shared channel.
  • the CSI reports may be triggered by the network using a trigger state in UL-related downlink control information (DCI) received at the UE.
  • DCI downlink control information
  • a periodic CSI reports may be triggered if a cyclic redundancy check (CRC) of the DCI is scrambled by a cell radio network temporary identifier (C-RNTI) .
  • C-RNTI cell radio network temporary identifier
  • semi-persistent CSI reports may be triggered if a CRC of the DCI is scrambled by a semi-persistent CSI RNTI (SP-CSI-RNTI) .
  • SP-CSI-RNTI semi-persistent CSI RNTI
  • the network may also schedule the UE with UL data transmissions on the PUSCH via UL-related DCI.
  • Uplink data transmissions and CSI reports may be configured via separate DCIs.
  • UL data transmissions and CSI reports may be configured by the network to occur in the same transmission slot on the PUSCH, resulting in a collision between the UL data transmissions and the CSI report.
  • the CSI report may be dropped (e.g., not transmitted during the slot) in favor of the UL data transmission, as illustrated in FIG. 7.
  • SP semi-persistent
  • AP periodic
  • aspects of the present disclosure propose techniques for handling the scenario when the starting symbol of a UL data transmission is not aligned with the starting symbol of the CSI report.
  • FIG. 8 illustrates example operations 800 for wireless communications in a network by a user equipment, for example, for collision handling between CSI reporting and UL data transmissions.
  • the UE may include one or more components as illustrated in FIG. 4 which may be configured to perform the operations described herein.
  • the antenna 452, demodulator/modulator 454, controller/processor 480, and/or memory 482 as illustrated in FIG. 4 may perform the operations described herein.
  • Operations 800 begin at 802 by receiving: a channel state information (CSI) report trigger that schedules the wireless device to transmit a CSI report and an uplink (UL) grant that schedules the wireless device to transmit UL data.
  • CSI channel state information
  • UL uplink
  • the UE determines, based on the CSI report trigger and the UL grant, that transmission of the CSI report and the UL data will collide. For example, in some cases, a collision may occur when a CSI report and UL data are scheduled to be transmitted during a same transmission slot. A collision may occur regardless of the starting symbols and symbol occupations of the respective CSI reports and UL data transmission in the transmission.
  • the UE decide, based on at least one of an indication of a relative timing between the CSI report transmission and the UL data transmission or an indication of a type of CSI report to be transmitted, to drop one of the CSI report or the UL data from transmission.
  • the UE transmits one of the CSI report or the UL data based on the decision.
  • FIG. 8A illustrates example operations 800A for wireless communications in a network by a base station (BS) , for example, for collision handling between CSI reporting and UL data transmissions.
  • Operations 800A may be considered complimentary to operations 800 performed by the UE.
  • the BS may include one or more components as illustrated in FIG. 4 which may be configured to perform the operations described herein.
  • the antenna 434, demodulator/modulator 432, controller/processor 440, and/or memory 442 as illustrated in FIG. 4 may perform the operations described herein.
  • Operations 800A begin at 802A by transmitting a channel state information (CSI) report trigger that schedules a wireless device to transmit a CSI report at a first transmission slot and an uplink (UL) grant that schedules the wireless device to transmit UL data at the first transmission slot.
  • CSI channel state information
  • UL uplink
  • the BS identifies, based on the CSI report trigger and the UL grant, that a scheduled CSI report transmission and a scheduled UL data transmission will collide.
  • the BS determines, based on at least one of a relative timing between the scheduled CSI report transmission and the scheduled UL data transmission or an indication of a type of CSI report to be transmitted, which of the scheduled CSI report transmission or the scheduled UL data transmission will be dropped from an uplink (UL) transmission.
  • UL uplink
  • the BS receives one of the CSI report or the UL data based on the determination.
  • a collision may occur when a UE receives a CSI report trigger transmitted by the BS that indicates CSI report is scheduled for transmission on a PUSCH in the same transmission slot as UL data (e.g., as indicated by a UL grant transmitted by the BS that schedules the UL data) .
  • the collision may occur in a transmission slot when a starting symbol of the CSI report transmission in the transmission slot (e.g., as indicated by the CSI report trigger) is not aligned with the starting symbol of the UL data transmission in the transmission slot (e.g., as indicated by the UL grant) .
  • FIG. 9 illustrates several transmission collision scenarios between CSI reports and UL data transmissions, for example, when starting symbols for the CSI reports and UL data transmissions are not aligned, according to certain aspects of the present disclosure.
  • the starting symbol of the UL data transmission lags behind the starting symbol of the CSI report transmission in the transmission slot.
  • the starting symbol of the CSI report transmission lags behind the starting symbol of the UL data transmission in the transmission slot.
  • the CSI report trigger may be transmitted/received later or earlier than the UL grant.
  • the UE may need to determine how to handle the collision. For example, the UE may need to determine which of the CSI report or the UL data transmission to drop from transmission.
  • the determination/decision to drop one of the CSI report or the UL data transmission may be based on at least one of an indication of a relative timing between the CSI report transmission and the UL data transmission (e.g., which starting symbol of the CSI report transmission or the UL data transmission is scheduled first) or an indication of a type of CSI report (e.g., semi-persistent (SP) CSI or aperiodic CSI) to be transmitted.
  • SP semi-persistent
  • the UE may decide to drop the transmission whose starting symbol occurs later in the transmission slot (e.g., the transmission that lags behind) .
  • the UE may decide to drop the UL data transmission since the relative timing between the CSI report and UL data transmission (e.g., based on the CSI report trigger and the UL grant) indicates the starting symbol of the UL data transmission lags behind the starting symbol of the CSI report transmission by one or more symbols.
  • the UE may decide to drop the CSI report transmission since the relative timing between the CSI report and UL data transmission (e.g., based on the CSI report trigger and the UL grant) indicates the starting symbol of the CSI report transmission lags behind the starting symbol of the UL data transmission by one or more symbols
  • the UE may decide to drop the UL data transmission or the CSI report transmission based on a type of the CSI report to be transmitted. For example, in some cases, if the CSI report that is to be transmitted is a semi-persistent (SP) CSI report, the UE may decide to drop the SP CSI report that collides with the UL data transmission (in some cases, irrespective of which transmission lags behind) . In other cases, if the CSI report that is to be transmitted is an aperiodic (AP) CSI report, the UE may either drop the transmission that lags behind (as described above) or drop the transmission with a lower priority. For example, in some cases, the AP CSI report may have a higher priority than the UL data transmission. In this case, the UE may decide to drop the UL data transmission since the AP CSI report has a higher priority than the UL data transmission.
  • SP semi-persistent
  • AP aperiodic
  • the UE may instead decide to multiplex the CSI report information with the UL data, for example, when certain timeline and resource constraints are satisfied, as described below.
  • FIG. 10 illustrates example operations 1000 for wireless communications in a network by a user equipment, for example, for collision handling between CSI reporting and UL data transmissions.
  • operations 1000 may be used by the UE to multiplex CSI report information with UL data instead of dropping one of the colliding transmissions.
  • the UE may include one or more components as illustrated in FIG. 4 which may be configured to perform the operations described herein.
  • the antenna 452, demodulator/modulator 454, controller/processor 480, and/or memory 482 as illustrated in FIG. 4 may perform the operations described herein.
  • Operations 1000 begin at 1002 by receiving: a channel state information (CSI) report trigger that schedules the wireless device to transmit a CSI report and an uplink (UL) grant that schedules the wireless device to transmit UL data.
  • CSI channel state information
  • UL uplink
  • the UE determines, based on the CSI report trigger and the UL grant, that transmission of the CSI report and the UL data will collide.
  • the UE decides whether to multiplex at least a portion of the CSI report with the UL data to form an UL transmission based on the determination that transmission of the CSI report and the UL data will collide.
  • the UE transmits the UL transmission the UL data, or the CSI report based on the decision.
  • FIG. 10A illustrates example operations 1000A for wireless communications in a network by a base station (BS) , for example, for collision handling between CSI reporting and UL data transmissions.
  • Operations 1000A may be considered complimentary to operations 1000 performed by the UE.
  • the BS may include one or more components as illustrated in FIG. 4 which may be configured to perform the operations described herein.
  • the antenna 434, demodulator/modulator 432, controller/processor 440, and/or memory 442 as illustrated in FIG. 4 may perform the operations described herein.
  • Operations 1000A begin at 1002A by transmitting a channel state information (CSI) report trigger that schedules a wireless device to transmit a CSI report at a first transmission slot and an uplink (UL) grant that schedules the wireless device to transmit UL data at the first transmission slot.
  • CSI channel state information
  • UL uplink
  • the BS identifies, based on the CSI report trigger and the UL grant, that a scheduled CSI report transmission and a scheduled UL data transmission will collide.
  • the BS determines, based on one or more timing constraints and one or more resource constraints, whether a scheduled uplink (UL) transmission comprises one the scheduled UL data transmission, the scheduled CSI report transmission, or a multiplexed stream of bits comprising the scheduled UL data transmission and at least a portion of the scheduled CSI report transmission.
  • UL uplink
  • the BS receives, based on the determination, one of the scheduled UL data transmission, the scheduled CSI report transmission, or the multiplexed stream of bits comprising the scheduled UL data transmission and the at least a portion of the scheduled CSI report transmission.
  • the UE may instead decide to multiplex the CSI report information with the UL data, for example, when certain timeline and resource constraints are satisfied.
  • the decision of whether to multiplex the CSI report and the UL data may be based on a determination by the determines that the UL grant is received later than the AP/SP CSI report trigger and the timing between the UL grant and the starting symbol of the CSI report is greater than or equal to a threshold. Further, the decision of whether to multiplex the CSI report and the UL data may be based on a determination by the UE that the AP/SP CSI report trigger is received later than the UL grant, and the timing between the AP/SP CSI report trigger and the starting symbol of the CSI report is greater than or equal to a threshold.
  • the threshold may be configured by the network via at least one of a radio resource control (RRC) message, a media access control control element (MAC-CE) message, or a DCI message.
  • RRC radio resource control
  • MAC-CE media access control control element
  • the decision of whether to multiplex the CSI report with the UL data may be based on a determination by the UE that there are enough resources granted by the received UL grant to accommodate the UL data and at least a portion of the CSI report information.
  • the UE may multiplex the entire CSI report with the UL data to form a UL transmission and transmit the UL transmission to the network/BS.
  • the UE may decide to discard a portion of the CSI report and multiplex a remaining portion of the CSI report with the UL data.
  • the determination of which portion or what information to discard from the CSI report may be based on a priority rule for the types of information included in the CSI report.
  • the priority rule for dropping a portion of the CSI report is explicitly known by both BS and UE.
  • the CSI report comprises the wideband part including wideband CQI, CRI, RI and wideband PMI, and subband part including subband CQI and subband PMI.
  • the UE can discard some of the subband parts, e.g., discarding the reports on even subbands or odd subbands.
  • the CSI report contains multiple reports, e.g., CSI report 0, CSI report 1, etc, then the UE can discard some CSI reports.
  • the UE may decide to drop the CSI report or make a determination of which of the UL data or the CSI report to discard, as described above, for example, based on at least one of a relative timing between a first scheduled symbol of the CSI report and a first scheduled symbol of the UL data or a type of CSI report to be transmitted.
  • the UE may decide drop the UL data. For example, as illustrated in FIG. 12, if the UE determines that the UL grant is received later than the AP/SP CSI report trigger and the timing between the UL grant and the starting symbol of the CSI report is less than a threshold, the UE may decide to drop one of the UL data. Additionally, if the UE determines that the AP/SP CSI report trigger is received later than the UL grant, and the timing between the AP/SP CSI report trigger and the starting symbol of the CSI report is less than a threshold, the UE may likewise drop one of the UL data .
  • FIG. 13 illustrates a communications device 1300 that may include various components (e.g., corresponding to means-plus-function components) configured to perform operations for the techniques disclosed herein, such as the operations illustrated in FIGs. 8 and 10.
  • the communications device 1300 includes a processing system 1302 coupled to a transceiver 1308.
  • the transceiver 1308 is configured to transmit and receive signals for the communications device 1300 via an antenna 1310, such as the various signal described herein.
  • the processing system 1302 may be configured to perform processing functions for the communications device 1300, including processing signals received and/or to be transmitted by the communications device 1300.
  • the processing system 1302 includes a processor 1304 coupled to a computer-readable medium/memory 1312 via a bus 1306.
  • the computer-readable medium/memory 1312 is configured to store instructions that when executed by processor 1304, cause the processor 1304 to perform the operations illustrated in FIG. 8 and 10, or other operations for performing the various techniques discussed herein.
  • the processor system 1302 further includes a receiver component 1314 for performing the operations illustrated in FIG. 8 at 802 and/or FIG. 10 at 1002. Additionally, the processing system 1302 includes a determination component 1316 for performing the operations illustrated in FIG. 8 at 804 and/or FIG. 10 at 1004. Additionally, the processing system 1302 includes a decision component 1318 for performing the operations illustrated in FIG. 8 at 806. Additionally, the processing system 1302 includes a multiplexer component 1320 for performing the operations illustrated in FIG. 10 at 1006. Additionally, the processing system 1302 includes a transmitter component 1322 for performing the operations illustrated in FIG. 8 at 808 and/or FIG. 10 at 1008.
  • the receiver component 1314, determination component 1316, decision component 1318, multiplexer component 1320, and the transmitter component 1322 may be coupled to the processor 1304 via bus 1306.
  • the receiver component 1314, determination component 1316, decision component 1318, multiplexer component 1320, and the transmitter component 1322 may be hardware circuits.
  • the receiver component 1314, determination component 1316, decision component 1318, multiplexer component 1320, and the transmitter component 1322 may be software components that are executed and run on processor 1304.
  • FIG. 14 illustrates a communications device 1400 that may include various components (e.g., corresponding to means-plus-function components) configured to perform operations for the techniques disclosed herein, such as the operations illustrated in FIGs. 8A and 10A.
  • the communications device 1400 includes a processing system 1402 coupled to a transceiver 1408.
  • the transceiver 1408 is configured to transmit and receive signals for the communications device 1400 via an antenna 1410, such as the various signal described herein.
  • the processing system 1402 may be configured to perform processing functions for the communications device 1400, including processing signals received and/or to be transmitted by the communications device 1400.
  • the processing system 1402 includes a processor 1404 coupled to a computer-readable medium/memory 1412 via a bus 1406.
  • the computer-readable medium/memory 1412 is configured to store instructions that when executed by processor 1404, cause the processor 1404 to perform the operations illustrated in FIGs. 8A and 10A, or other operations for performing the various techniques discussed herein.
  • the processor system 1402 further includes a transmitter component 1414 for performing the operations illustrated in FIG. 8A at 802A and/or FIG. 10A at 1002A. Additionally, the processing system 1402 includes an identifier component 1416 for performing the operations illustrated in FIG. 8A at 804A and/or FIG. 10A at 1004A. Additionally, the processing system 1402 includes a determination component 1418 for performing the operations illustrated in FIG. 8A at 806A and/or FIG 10A at 1006A. Additionally, the processing system 1402 includes a receiver component 1420 for performing the operations illustrated in FIG. 8A at 808A and/or FIG 10A at 1008A.
  • the transmitter component 1414, identifier component 1416, determination component 1418, and receiver component 1420 may be coupled to the processor 1404 via bus 1406.
  • the transmitter component 1414, identifier component 1416, determination component 1418, and receiver component 1420 may be hardware circuits.
  • the transmitter component 1414, identifier component 1416, determination component 1418, and receiver component 1420 may be software components that are executed and run on processor 1404.
  • the methods disclosed herein comprise one or more steps or actions for achieving the methods.
  • the method steps and/or actions may be interchanged with one another without departing from the scope of the claims.
  • the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims.
  • a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members.
  • “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) .
  • determining encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” may include receiving (e.g., receiving information) , accessing (e.g., accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like.
  • the various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions.
  • the means may include various hardware and/or software component (s) and/or module (s) , including, but not limited to a circuit, an application specific integrated circuit (ASIC) , or processor.
  • ASIC application specific integrated circuit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • PLD programmable logic device
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • an example hardware configuration may comprise a processing system in a wireless node.
  • the processing system may be implemented with a bus architecture.
  • the bus may include any number of interconnecting buses and bridges depending on the specific application of the processing system and the overall design constraints.
  • the bus may link together various circuits including a processor, machine-readable media, and a bus interface.
  • the bus interface may be used to connect a network adapter, among other things, to the processing system via the bus.
  • the network adapter may be used to implement the signal processing functions of the PHY layer.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • the bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further.
  • the processor may be implemented with one or more general-purpose and/or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry that can execute software. Those skilled in the art will recognize how best to implement the described functionality for the processing system depending on the particular application and the overall design constraints imposed on the overall system.
  • the functions may be stored or transmitted over as one or more instructions or code on a computer readable medium.
  • Software shall be construed broadly to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • the processor may be responsible for managing the bus and general processing, including the execution of software modules stored on the machine-readable storage media.
  • a computer-readable storage medium may be coupled to a processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor.
  • the machine-readable media may include a transmission line, a carrier wave modulated by data, and/or a computer readable storage medium with instructions stored thereon separate from the wireless node, all of which may be accessed by the processor through the bus interface.
  • the machine-readable media, or any portion thereof may be integrated into the processor, such as the case may be with cache and/or general register files.
  • machine-readable storage media may include, by way of example, RAM (Random Access Memory) , flash memory, ROM (Read Only Memory) , PROM (Programmable Read-Only Memory) , EPROM (Erasable Programmable Read-Only Memory) , EEPROM (Electrically Erasable Programmable Read-Only Memory) , registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • PROM Programmable Read-Only Memory
  • EPROM Erasable Programmable Read-Only Memory
  • EEPROM Electrical Erasable Programmable Read-Only Memory
  • registers magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof.
  • the machine-readable media may be embodied in a computer-program product.
  • a software module may comprise a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media.
  • the computer-readable media may comprise a number of software modules.
  • the software modules include instructions that, when executed by an apparatus such as a processor, cause the processing system to perform various functions.
  • the software modules may include a transmission module and a receiving module. Each software module may reside in a single storage device or be distributed across multiple storage devices.
  • a software module may be loaded into RAM from a hard drive when a triggering event occurs.
  • the processor may load some of the instructions into cache to increase access speed.
  • One or more cache lines may then be loaded into a general register file for execution by the processor.
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared (IR) , radio, and microwave
  • the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium.
  • Disk and disc include compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers.
  • computer-readable media may comprise non-transitory computer-readable media (e.g., tangible media) .
  • computer-readable media may comprise transitory computer-readable media (e.g., a signal) . Combinations of the above should also be included within the scope of computer-readable media.
  • certain aspects may comprise a computer program product for performing the operations presented herein.
  • a computer program product may comprise a computer-readable medium having instructions stored (and/or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein.
  • modules and/or other appropriate means for performing the methods and techniques described herein can be downloaded and/or otherwise obtained by a user terminal and/or base station as applicable.
  • a user terminal and/or base station can be coupled to a server to facilitate the transfer of means for performing the methods described herein.
  • various methods described herein can be provided via storage means (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc. ) , such that a user terminal and/or base station can obtain the various methods upon coupling or providing the storage means to the device.
  • storage means e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.
  • CD compact disc
  • floppy disk etc.
  • any other suitable technique for providing the methods and techniques described herein to a device can be utilized.

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  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon certains aspects, la présente invention concerne des techniques pour des améliorations de configuration de ressource de signal de référence de sondage. Un procédé consiste généralement à : recevoir un déclencheur de rapport d'informations d'état de canal (CSI) qui programme le dispositif sans fil pour transmettre un rapport CSI et une autorisation de liaison montante (UL) qui programme le dispositif sans fil pour transmettre des données UL; déterminer, sur la base du déclencheur de rapport CSI et de l'autorisation UL, que les transmissions du rapport CSI et des données UL vont entrer en collision; et décider, sur la base d'au moins une indication d'une synchronisation relative entre la transmission de rapport CSI et la transmission de données UL ou d'une indication d'un type de rapport CSI à transmettre, d'abandonner l'un du rapport CSI ou des données UL de la transmission, et transmettre l'un du rapport CSI ou des données UL sur la base de la décision.
PCT/CN2018/100045 2018-08-10 2018-08-10 Traitement de collision pour rapport d'informations d'état de canal et données de liaison montante WO2020029273A1 (fr)

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PCT/CN2018/100045 WO2020029273A1 (fr) 2018-08-10 2018-08-10 Traitement de collision pour rapport d'informations d'état de canal et données de liaison montante
PCT/CN2019/099189 WO2020029900A1 (fr) 2018-08-10 2019-08-05 Gestion de collision destinée à des rapports d'informations d'état de canal et des données de liaison montante

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PCT/CN2019/099189 WO2020029900A1 (fr) 2018-08-10 2019-08-05 Gestion de collision destinée à des rapports d'informations d'état de canal et des données de liaison montante

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102378271A (zh) * 2010-08-16 2012-03-14 电信科学技术研究院 Srs和周期csi的传输及其指示方法、装置及系统
CN102685707A (zh) * 2011-03-09 2012-09-19 华为技术有限公司 一种解决非周期srs和上行控制信令碰撞的方法及装置
US20140204856A1 (en) * 2013-01-23 2014-07-24 Qualcomm Incorporated Efficient uplink resource indication for csi feedback

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102378271A (zh) * 2010-08-16 2012-03-14 电信科学技术研究院 Srs和周期csi的传输及其指示方法、装置及系统
CN102685707A (zh) * 2011-03-09 2012-09-19 华为技术有限公司 一种解决非周期srs和上行控制信令碰撞的方法及装置
US20140204856A1 (en) * 2013-01-23 2014-07-24 Qualcomm Incorporated Efficient uplink resource indication for csi feedback

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