WO2021243481A1 - Configuration dynamique de dmrs dans des réseaux 5g - Google Patents

Configuration dynamique de dmrs dans des réseaux 5g Download PDF

Info

Publication number
WO2021243481A1
WO2021243481A1 PCT/CN2020/093565 CN2020093565W WO2021243481A1 WO 2021243481 A1 WO2021243481 A1 WO 2021243481A1 CN 2020093565 W CN2020093565 W CN 2020093565W WO 2021243481 A1 WO2021243481 A1 WO 2021243481A1
Authority
WO
WIPO (PCT)
Prior art keywords
pdsch
dmrs
configuration
network entity
cqi
Prior art date
Application number
PCT/CN2020/093565
Other languages
English (en)
Inventor
Zhuoqi XU
Yuankun ZHU
Pan JIANG
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/CN2020/093565 priority Critical patent/WO2021243481A1/fr
Publication of WO2021243481A1 publication Critical patent/WO2021243481A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • 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

Definitions

  • aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to reference signal configuration. Certain embodiments of the technology discussed below can enable and provide dynamic demodulation reference signal (DMRS) configuration.
  • DMRS dynamic demodulation reference signal
  • Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and the like. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing the available network resources. Such networks, which are usually multiple access networks, support communications for multiple users by sharing the available network resources.
  • a wireless communication network may include a number of base stations or node Bs that can support communication for a number of user equipments (UEs) .
  • a UE may communicate with a base station via downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the base station to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the base station.
  • a base station may transmit data and control information on the downlink to a UE and/or may receive data and control information on the uplink from the UE.
  • a transmission from the base station may encounter interference due to transmissions from neighbor base stations or from other wireless radio frequency (RF) transmitters.
  • RF radio frequency
  • a transmission from the UE may encounter interference from uplink transmissions of other UEs communicating with the neighbor base stations or from other wireless RF transmitters. This interference may degrade performance on both the downlink and uplink.
  • a method of wireless communication includes receiving, by a network entity from a user equipment (UE) , a message including channel state feedback; determining, by the network entity, a channel quality indicator (CQI) value based on the channel state feedback; configuring, by the network entity, a demodulation reference signal (DMRS) setting of a physical downlink control channel (PDSCH) configuration for a particular slot based on the CQI value being greater than a CQI threshold; and configuring, by the network entity, the DMRS setting of the PDSCH configuration for multiple slots based on a downlink block error rate (BLER) of a PDSCH transmission for the particular slot being less than a BLER threshold and based on a modulation coding scheme (MCS) value of the PDSCH transmission for the particular slot being greater than a MCS threshold.
  • CQI channel quality indicator
  • DMRS demodulation reference signal
  • an apparatus configured for wireless communication.
  • the apparatus includes means for receiving, by a network entity from a user equipment (UE) , a message including channel state feedback; means for determining, by the network entity, a channel quality indicator (CQI) value based on the channel state feedback; means for configuring, by the network entity, a demodulation reference signal (DMRS) setting of a physical downlink control channel (PDSCH) configuration for a particular slot based on the CQI value being greater than a CQI threshold; and means for configuring, by the network entity, the DMRS setting of the PDSCH configuration for multiple slots based on a downlink block error rate (BLER) of a PDSCH transmission for the particular slot being less than a BLER threshold and based on a modulation coding scheme (MCS) value of the PDSCH transmission for the particular slot being greater than a MCS threshold.
  • BLER downlink block error rate
  • MCS modulation coding scheme
  • a non-transitory computer-readable medium having program code recorded thereon.
  • the program code further includes code to receive, by a network entity from a user equipment (UE) , a message including channel state feedback; determine, by the network entity, a channel quality indicator (CQI) value based on the channel state feedback; configure, by the network entity, a demodulation reference signal (DMRS) setting of a physical downlink control channel (PDSCH) configuration for a particular slot based on the CQI value being greater than a CQI threshold; and configure, by the network entity, the DMRS setting of the PDSCH configuration for multiple slots based on a downlink block error rate (BLER) of a PDSCH transmission for the particular slot being less than a BLER threshold and based on a modulation coding scheme (MCS) value of the PDSCH transmission for the particular slot being greater than a MCS threshold.
  • BLER downlink block error rate
  • MCS modulation coding scheme
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the processor is configured to receive, by a network entity from a user equipment (UE) , a message including channel state feedback; determine, by the network entity, a channel quality indicator (CQI) value based on the channel state feedback; configure, by the network entity, a demodulation reference signal (DMRS) setting of a physical downlink control channel (PDSCH) configuration for a particular slot based on the CQI value being greater than a CQI threshold; and configure, by the network entity, the DMRS setting of the PDSCH configuration for multiple slots based on a downlink block error rate (BLER) of a PDSCH transmission for the particular slot being less than a BLER threshold and based on a modulation coding scheme (MCS) value of the PDSCH transmission for the particular slot being greater than a MCS threshold.
  • BLER downlink block error rate
  • MCS modulation coding scheme
  • a method of wireless communication includes transmitting, by a user equipment (UE) to a network entity, a message including channel state feedback, the channel state feedback include a channel quality indicator (CQI) configured to enable the network entity to perform dynamic PDSCH configuration; receiving, by the UE, a first PDSCH having a first DMRS configuration for a particular slot; transmitting, by the UE, an acknowledgment message responsive to the first PDSCH transmission; and receiving, by the UE, a second PDSCH having the first DMRS configuration for a second particular slot, the second particular slot having a second type of slot configuration different from a first type of slot configuration of the particular slot.
  • CQI channel quality indicator
  • an apparatus configured for wireless communication.
  • the apparatus includes means for transmitting, by a user equipment (UE) to a network entity, a message including channel state feedback, the channel state feedback include a channel quality indicator (CQI) configured to enable the network entity to perform dynamic PDSCH configuration; means for receiving, by the UE, a first PDSCH having a first DMRS configuration for a particular slot; means for transmitting, by the UE, an acknowledgment message responsive to the first PDSCH transmission; and means for receiving, by the UE, a second PDSCH having the first DMRS configuration for a second particular slot, the second particular slot having a second type of slot configuration different from a first type of slot configuration of the particular slot.
  • CQI channel quality indicator
  • a non-transitory computer-readable medium having program code recorded thereon.
  • the program code further includes code to transmit, by a user equipment (UE) to a network entity, a message including channel state feedback, the channel state feedback include a channel quality indicator (CQI) configured to enable the network entity to perform dynamic PDSCH configuration; receive, by the UE, a first PDSCH having a first DMRS configuration for a particular slot; transmit, by the UE, an acknowledgment message responsive to the first PDSCH transmission; and receive, by the UE, a second PDSCH having the first DMRS configuration for a second particular slot, the second particular slot having a second type of slot configuration different from a first type of slot configuration of the particular slot.
  • CQI channel quality indicator
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the processor is configured to transmit, by a user equipment (UE) to a network entity, a message including channel state feedback, the channel state feedback include a channel quality indicator (CQI) configured to enable the network entity to perform dynamic PDSCH configuration; receive, by the UE, a first PDSCH having a first DMRS configuration for a particular slot; transmit, by the UE, an acknowledgment message responsive to the first PDSCH transmission; and receive, by the UE, a second PDSCH having the first DMRS configuration for a second particular slot, the second particular slot having a second type of slot configuration different from a first type of slot configuration of the particular slot.
  • CQI channel quality indicator
  • FIG. 1 is a block diagram illustrating details of a wireless communication system according to some embodiments of the present disclosure.
  • FIG. 2 is a block diagram conceptually illustrating a design of a base station and a UE configured according to some embodiments of the present disclosure.
  • FIG. 3A is an example of a PDSCH configuration resource.
  • FIG. 3B is an example of a logic diagram for DMRS configuration determination.
  • FIG. 3C is a diagram of an example of a thresholds and parameters table for DMRS configuration.
  • FIG. 4 is a block diagram illustrating an example of a wireless communications system (with a UE and base station) with DMRS configuration operations.
  • FIG. 5 is a ladder diagram of an example of CQI and BLER based DMRS configuration operations according to some embodiments of the present disclosure.
  • FIG. 6 is a ladder diagram of an example of CQI and MCS based DMRS configuration operations according to some embodiments of the present disclosure.
  • FIG. 7 is a flow diagram illustrating example blocks executed by a UE configured according to an aspect of the present disclosure.
  • FIG. 8 is a flow diagram illustrating example blocks executed by a base station configured according to an aspect of the present disclosure.
  • FIG. 9 is a block diagram conceptually illustrating a design of a UE configured to perform precoding information update operations according to some embodiments of the present disclosure.
  • FIG. 10 is a block diagram conceptually illustrating a design of a base station configured to perform precoding information update operations according to some embodiments of the present disclosure.
  • This disclosure relates generally to providing or participating in communication as between two or more wireless devices in one or more wireless communications systems, also referred to as wireless communications networks.
  • the techniques and apparatus may be used for wireless communication networks such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single-carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, 5 th Generation (5G) or new radio (NR) networks (sometimes referred to as “5G NR” networks/systems/devices) , as well as other communications networks.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal FDMA
  • SC-FDMA single-carrier FDMA
  • LTE long-term evolution
  • GSM Global System for Mobile communications
  • 5G 5 th Generation
  • NR new radio
  • a CDMA network may implement a radio technology such as universal terrestrial radio access (UTRA) , cdma2000, and the like.
  • UTRA includes wideband-CDMA (W-CDMA) and low chip rate (LCR) .
  • CDMA2000 covers IS-2000, IS-95, and IS-856 standards.
  • a TDMA network may, for example implement a radio technology such as GSM.
  • 3GPP defines standards for the GSM EDGE (enhanced data rates for GSM evolution) radio access network (RAN) , also denoted as GERAN.
  • GERAN is the radio component of GSM/EDGE, together with the network that joins the base stations (for example, the Ater and Abis interfaces) and the base station controllers (A interfaces, etc. ) .
  • the radio access network represents a component of a GSM network, through which phone calls and packet data are routed from and to the public switched telephone network (PSTN) and Internet to and from subscriber handsets, also known as user terminals or user equipments (UEs) .
  • PSTN public switched telephone network
  • UEs subscriber handsets
  • a mobile phone operator's network may comprise one or more GERANs, which may be coupled with Universal Terrestrial Radio Access Networks (UTRANs) in the case of a UMTS/GSM network.
  • UTRANs Universal Terrestrial Radio Access Networks
  • An operator network may also include one or more LTE networks, and/or one or more other networks.
  • the various different network types may use different radio access technologies (RATs) and radio access networks (RANs) .
  • RATs radio access technologies
  • RANs radio access networks
  • An OFDMA network may implement a radio technology such as evolved UTRA (E-UTRA) , IEEE 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM and the like.
  • E-UTRA evolved UTRA
  • GSM Global System for Mobile Communications
  • LTE long term evolution
  • UTRA, E-UTRA, GSM, UMTS and LTE are described in documents provided from an organization named “3rd Generation Partnership Project” (3GPP)
  • cdma2000 is described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • 3GPP 3rd Generation Partnership Project
  • 3GPP long term evolution LTE
  • UMTS universal mobile telecommunications system
  • the 3GPP may define specifications for the next generation of mobile networks, mobile systems, and mobile devices.
  • the present disclosure is concerned with the evolution of wireless technologies from LTE, 4G, 5G, NR, and beyond with shared access to wireless spectrum between networks using a collection of new and different radio access technologies or radio air interfaces.
  • 5G networks contemplate diverse deployments, diverse spectrum, and diverse services and devices that may be implemented using an OFDM-based unified, air interface. To achieve these goals, further enhancements to LTE and LTE-A are considered in addition to development of the new radio technology for 5G NR networks.
  • the 5G NR will be capable of scaling to provide coverage (1) to a massive Internet of things (IoTs) with an ultra-high density (e.g., ⁇ 1M nodes/km 2 ) , ultra-low complexity (e.g., ⁇ 10s of bits/sec) , ultra-low energy (e.g., ⁇ 10+ years of battery life) , and deep coverage with the capability to reach challenging locations; (2) including mission-critical control with strong security to safeguard sensitive personal, financial, or classified information, ultra-high reliability (e.g., ⁇ 99.9999%reliability) , ultra-low latency (e.g., ⁇ 1 ms) , and users with wide ranges of mobility or lack thereof; and (3) with enhanced mobile broadband including extreme high capacity (e.g., ⁇ 10 Tbps/km 2 ) , extreme data rates (e.g., multi-Gbps rate, 100+ Mbps user experienced rates) , and deep awareness with advanced discovery and optimizations.
  • IoTs Internet of things
  • 5G NR devices, networks, and systems may be implemented to use optimized OFDM-based waveform features. These features may include scalable numerology and transmission time intervals (TTIs) ; a common, flexible framework to efficiently multiplex services and features with a dynamic, low-latency time division duplex (TDD) /frequency division duplex (FDD) design; and advanced wireless technologies, such as massive multiple input, multiple output (MIMO) , robust millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility.
  • TTIs transmission time intervals
  • TDD dynamic, low-latency time division duplex
  • FDD frequency division duplex
  • advanced wireless technologies such as massive multiple input, multiple output (MIMO) , robust millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility.
  • Scalability of the numerology in 5G NR with scaling of subcarrier spacing, may efficiently address operating diverse services across diverse spectrum and diverse deployments.
  • subcarrier spacing may occur with 15 kHz, for example over 1, 5, 10, 20 MHz, and the like bandwidth.
  • subcarrier spacing may occur with 30 kHz over 80/100 MHz bandwidth.
  • the subcarrier spacing may occur with 60 kHz over a 160 MHz bandwidth.
  • subcarrier spacing may occur with 120 kHz over a 500MHz bandwidth.
  • the scalable numerology of 5G NR facilitates scalable TTI for diverse latency and quality of service (QoS) requirements. For example, shorter TTI may be used for low latency and high reliability, while longer TTI may be used for higher spectral efficiency.
  • QoS quality of service
  • 5G NR also contemplates a self-contained integrated subframe design with uplink/downlink scheduling information, data, and acknowledgement in the same subframe.
  • the self-contained integrated subframe supports communications in unlicensed or contention-based shared spectrum, adaptive uplink/downlink that may be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet the current traffic needs.
  • LTE terminology may be used as illustrative examples in portions of the description below; however, the description is not intended to be limited to LTE applications.
  • the present disclosure is concerned with shared access to wireless spectrum between networks using different radio access technologies or radio air interfaces, such as those of 5G NR.
  • wireless communication networks adapted according to the concepts herein may operate with any combination of licensed or unlicensed spectrum depending on loading and availability. Accordingly, it will be apparent to one of skill in the art that the systems, apparatus and methods described herein may be applied to other communications systems and applications than the particular examples provided.
  • Implementations may range from chip-level or modular components to non-modular, non-chip-level implementations and further to aggregated, distributed, or OEM devices or systems incorporating one or more described aspects.
  • devices incorporating described aspects and features may also necessarily include additional components and features for implementation and practice of claimed and described embodiments. It is intended that innovations described herein may be practiced in a wide variety of implementations, including both large/small devices, chip-level components, multi-component systems (e.g. RF-chain, communication interface, processor) , distributed arrangements, end-user devices, etc. of varying sizes, shapes, and constitution.
  • FIG. 1 shows wireless network 100 for communication according to some embodiments.
  • Wireless network 100 may, for example, comprise a 5G wireless network.
  • components appearing in FIG. 1 are likely to have related counterparts in other network arrangements including, for example, cellular-style network arrangements and non-cellular-style-network arrangements (e.g., device to device or peer to peer or ad hoc network arrangements, etc. ) .
  • Wireless network 100 illustrated in FIG. 1 includes a number of base stations 105 and other network entities.
  • a base station may be a station that communicates with the UEs and may also be referred to as an evolved node B (eNB) , a next generation eNB (gNB) , an access point, and the like.
  • eNB evolved node B
  • gNB next generation eNB
  • Each base station 105 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to this particular geographic coverage area of a base station and/or a base station subsystem serving the coverage area, depending on the context in which the term is used.
  • base stations 105 may be associated with a same operator or different operators (e.g., wireless network 100 may comprise a plurality of operator wireless networks) , and may provide wireless communications using one or more of the same frequencies (e.g., one or more frequency bands in licensed spectrum, unlicensed spectrum, or a combination thereof) as a neighboring cell.
  • an individual base station 105 or UE 115 may be operated by more than one network operating entity.
  • each base station 105 and UE 115 may be operated by a single network operating entity.
  • a base station may provide communication coverage for a macro cell or a small cell, such as a pico cell or a femto cell, and/or other types of cell.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a pico cell, would generally cover a relatively smaller geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a femto cell, would also generally cover a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide 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, and the like) .
  • a base station for a macro cell may be referred to as a macro base station.
  • a base station for a small cell may be referred to as a small cell base station, a pico base station, a femto base station or a home base station. In the example shown in FIG.
  • base stations 105d and 105e are regular macro base stations, while base stations 105a-105c are macro base stations enabled with one of 3 dimension (3D) , full dimension (FD) , or massive MIMO. Base stations 105a-105c take advantage of their higher dimension MIMO capabilities to exploit 3D beamforming in both elevation and azimuth beamforming to increase coverage and capacity.
  • Base station 105f is a small cell base station which may be a home node or portable access point.
  • a base station may support one or multiple (e.g., two, three, four, and the like) cells.
  • Wireless network 100 may support synchronous or asynchronous operation.
  • the base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time.
  • the base stations may have different frame timing, and transmissions from different base stations may not be aligned in time.
  • networks may be enabled or configured to handle dynamic switching between synchronous or asynchronous operations.
  • UEs 115 are dispersed throughout the wireless network 100, and each UE may be stationary or mobile.
  • a mobile apparatus is commonly referred to as user equipment (UE) in standards and specifications promulgated by the 3rd Generation Partnership Project (3GPP)
  • UE user equipment
  • 3GPP 3rd Generation Partnership Project
  • a mobile station MS
  • subscriber station a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal (AT) , a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, a gaming device, an augmented reality device, vehicular component device/module, or some other suitable terminology.
  • AT access terminal
  • a “mobile” apparatus or UE need not necessarily have a capability to move, and may be stationary.
  • Some non-limiting examples of a mobile apparatus such as may comprise embodiments of one or more of UEs 115, include a mobile, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a laptop, a personal computer (PC) , a notebook, a netbook, a smart book, a tablet, and a personal digital assistant (PDA) .
  • a mobile such as may comprise embodiments of one or more of UEs 115, include a mobile, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a laptop, a personal computer (PC) , a notebook, a netbook, a smart book, a tablet, and a personal digital assistant (PDA) .
  • PDA personal digital assistant
  • a mobile apparatus may additionally be an “Internet of things” (IoT) or “Internet of everything” (IoE) device such as an automotive or other transportation vehicle, a satellite radio, a global positioning system (GPS) device, a logistics controller, a drone, a multi-copter, a quad-copter, a smart energy or security device, a solar panel or solar array, municipal lighting, water, or other infrastructure; industrial automation and enterprise devices; consumer and wearable devices, such as eyewear, a wearable camera, a smart watch, a health or fitness tracker, a mammal implantable device, gesture tracking device, medical device, a digital audio player (e.g., MP3 player) , a camera, a game console, etc.; and digital home or smart home devices such as a home audio, video, and multimedia device, an appliance, a sensor, a vending machine, intelligent lighting, a home security system, a smart meter, etc.
  • IoT Internet of things
  • IoE Internet of everything
  • a UE may be a device that includes a Universal Integrated Circuit Card (UICC) .
  • a UE may be a device that does not include a UICC.
  • UEs that do not include UICCs may also be referred to as IoE devices.
  • UEs 115a-115d of the embodiment illustrated in FIG. 1 are examples of mobile smart phone-type devices accessing wireless network 100
  • a UE may also be a machine specifically configured for connected communication, including machine type communication (MTC) , enhanced MTC (eMTC) , narrowband IoT (NB-IoT) and the like.
  • MTC machine type communication
  • eMTC enhanced MTC
  • NB-IoT narrowband IoT
  • UEs 115e-115k illustrated in FIG. 1 are examples of various machines configured for communication that access wireless network 100.
  • a mobile apparatus such as UEs 115, may be able to communicate with any type of the base stations, whether macro base stations, pico base stations, femto base stations, relays, and the like.
  • a lightning bolt e.g., communication link
  • UEs may operate as base stations or other network nodes in some scenarios.
  • Backhaul communication between base stations of wireless network 100 may occur using wired and/or wireless communication links.
  • base stations 105a-105c serve UEs 115a and 115b using 3D beamforming and coordinated spatial techniques, such as coordinated multipoint (CoMP) or multi-connectivity.
  • Macro base station 105d performs backhaul communications with base stations 105a-105c, as well as small cell, base station 105f.
  • Macro base station 105d also transmits multicast services which are subscribed to and received by UEs 115c and 115d.
  • Such multicast services may include mobile television or stream video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber alerts or gray alerts.
  • Wireless network 100 of embodiments supports mission critical communications with ultra-reliable and redundant links for mission critical devices, such UE 115e, which is a drone. Redundant communication links with UE 115e include from macro base stations 105d and 105e, as well as small cell base station 105f.
  • UE 115f thermometer
  • UE 115g smart meter
  • UE 115h wearable device
  • Wireless network 100 may also provide additional network efficiency through dynamic, low-latency TDD/FDD communications, such as in a vehicle-to-vehicle (V2V) mesh network between UEs 115i-115k communicating with macro base station 105e.
  • V2V vehicle-to-vehicle
  • FIG. 2 shows a block diagram of a design of a base station 105 and a UE 115, which may be any of the base stations and one of the UEs in FIG. 1.
  • base station 105 may be small cell base station 105f in FIG. 1
  • UE 115 may be UE 115c or 115D operating in a service area of base station 105f, which in order to access small cell base station 105f, would be included in a list of accessible UEs for small cell base station 105f.
  • Base station 105 may also be a base station of some other type. As shown in FIG. 2, base station 105 may be equipped with antennas 234a through 234t, and UE 115 may be equipped with antennas 252a through 252r for facilitating wireless communications.
  • transmit processor 220 may receive data from data source 212 and control information from controller/processor 240.
  • the control information may be for the physical broadcast channel (PBCH) , physical control format indicator channel (PCFICH) , physical hybrid-ARQ (automatic repeat request) indicator channel (PHICH) , physical downlink control channel (PDCCH) , enhanced physical downlink control channel (EPDCCH) , MTC physical downlink control channel (MPDCCH) , etc.
  • the data may be for the PDSCH, etc.
  • Transmit processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • Transmit processor 220 may also generate reference symbols, e.g., for the primary synchronization signal (PSS) and secondary synchronization signal (SSS) , and cell-specific reference signal.
  • Transmit (TX) multiple-input multiple-output (MIMO) processor 230 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 modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • TX multiple-input multiple-output
  • MIMO multiple-input multiple-output
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • Each modulator 232 may additionally or alternatively process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from modulators 232a through 232t may be transmitted via antennas 234a through 234t, respectively.
  • the antennas 252a through 252r may receive the downlink signals from base station 105 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 respective received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols.
  • MIMO detector 256 may obtain received symbols from demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • Receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 115 to data sink 260, and provide decoded control information to controller/processor 280.
  • transmit processor 264 may receive and process data (e.g., for the physical uplink shared channel (PUSCH) ) from data source 262 and control information (e.g., for the physical uplink control channel (PUCCH) ) from controller/processor 280. Transmit processor 264 may also generate reference symbols for a reference signal. The symbols from transmit processor 264 may be precoded by TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for SC-FDM, etc. ) , and transmitted to base station 105.
  • data e.g., for the physical uplink shared channel (PUSCH)
  • control information e.g., for the physical uplink control channel (PUCCH)
  • controller/processor 280 e.g., for the physical uplink control channel (PUCCH)
  • Transmit processor 264 may also generate reference symbols for a reference signal.
  • the symbols from transmit processor 264 may be precoded by TX MIMO processor 266 if applicable,
  • the uplink signals from UE 115 may be received by antennas 234, processed by demodulators 232, detected by MIMO detector 236 if applicable, and further processed by receive processor 238 to obtain decoded data and control information sent by UE 115.
  • Processor 238 may provide the decoded data to data sink 239 and the decoded control information to controller/processor 240.
  • Controllers/processors 240 and 280 may direct the operation at base station 105 and UE 115, respectively. Controller/processor 240 and/or other processors and modules at base station 105 and/or controller/processor 280 and/or other processors and modules at UE 115 may perform or direct the execution of various processes for the techniques described herein, such as to perform or direct the execution illustrated in FIGS. 6 and 7, and/or other processes for the techniques described herein.
  • Memories 242 and 282 may store data and program codes for base station 105 and UE 115, respectively.
  • Scheduler 244 may schedule UEs for data transmission on the downlink and/or uplink.
  • Wireless communications systems operated by different network operating entities may share spectrum.
  • a network operating entity may be configured to use an entirety of a designated shared spectrum for at least a period of time before another network operating entity uses the entirety of the designated shared spectrum for a different period of time.
  • certain resources e.g., time
  • a network operating entity may be allocated certain time resources reserved for exclusive communication by the network operating entity using the entirety of the shared spectrum.
  • the network operating entity may also be allocated other time resources where the entity is given priority over other network operating entities to communicate using the shared spectrum.
  • These time resources, prioritized for use by the network operating entity may be utilized by other network operating entities on an opportunistic basis if the prioritized network operating entity does not utilize the resources. Additional time resources may be allocated for any network operator to use on an opportunistic basis.
  • Access to the shared spectrum and the arbitration of time resources among different network operating entities may be centrally controlled by a separate entity, autonomously determined by a predefined arbitration scheme, or dynamically determined based on interactions between wireless nodes of the network operators.
  • UE 115 and base station 105 may operate in a shared radio frequency spectrum band, which may include licensed or unlicensed (e.g., contention-based) frequency spectrum.
  • UEs 115 or base stations 105 may traditionally perform a medium-sensing procedure to contend for access to the frequency spectrum.
  • UE 115 or base station 105 may perform a listen before talk (LBT) procedure such as a clear channel assessment (CCA) prior to communicating in order to determine whether the shared channel is available.
  • LBT listen before talk
  • CCA clear channel assessment
  • a CCA may include an energy detection procedure to determine whether there are any other active transmissions.
  • a device may infer that a change in a received signal strength indicator (RSSI) of a power meter indicates that a channel is occupied.
  • RSSI received signal strength indicator
  • a CCA also may include detection of specific sequences that indicate use of the channel.
  • another device may transmit a specific preamble prior to transmitting a data sequence.
  • an LBT procedure may include a wireless node adjusting its own backoff window based on the amount of energy detected on a channel and/or the acknowledge/negative-acknowledge (ACK/NACK) feedback for its own transmitted packets as a proxy for collisions.
  • ACK/NACK acknowledge/negative-acknowledge
  • FIGS. 3A-3C illustrate diagrams for dynamic PDSCH configuration.
  • an example of PDSCH configuration resource is illustrated.
  • the UE may have a particular corresponding DMRS configuration.
  • the DMRS configuration for a dedicated PDSCH is as shown in FIG. 3A.
  • the DMRS configuration always has a dmrs-AdditionalPosition of pos1, where dmrs-AdditionalPosition is the number of additional DMRS.
  • a configuration of pos1 means that in a downlink slot, a DMRS occupies two symbols of the total fourteen symbols of the slot.
  • the two dedicated DMRS symbols which are used to help the UE decode, may be redundant and not needed.
  • the UE does not need the second DMRS symbol to successfully decode the transmission and this symbol represents wasted or unneeded overhead for which if eliminated, throughput can be increased.
  • NW network
  • a network device may set the number of DMRS symbols based on UE conditions. To illustrate, if a CQI in CSF reported by the UE is good, network device may consider to configure (e.g., re-configure) the number of DMRS symbol for dedicated PDSCH. The network device may try a new DMRS configuration at a particular slot (e.g., a flexible/reconfigurable slot of a frame as it may be shorter and often has less demand/utilization) with the number of DMRS symbols and set it as a sample trial for dynamic DMRS configuration.
  • a particular slot e.g., a flexible/reconfigurable slot of a frame as it may be shorter and often has less demand/utilization
  • the reconfiguration may have less adverse impact on UE and network performance if the new DMRS setting results in poor performance as opposed to applying the new DMRS setting immediately, and then attempting to walk back the change through another reconfiguration based on poor performance.
  • An example of such dynamic DMRS configuration is illustrated in FIG. 3B.
  • FIG. 3B is an example of a logic diagram for dynamic DMRS configuration. Specifically, FIG. 3B is logic diagram for determining a particular DMRS configuration based on CQI, BLER, and MCS.
  • a network may be set to operate with a DMRS of pos1 for PDSCH transmissions and may be set for CSF reports to include CQI.
  • the network may reconfigure the DMRS to a setting of post1 (2 DMRS symbols per PDSCH) and/or reconfigured the CSF reports to include CQI.
  • the network may configure such settings responsive to connection /attachment of a UE (e.g., UE in an RRC CONNECTED state) .
  • a network device monitors a CQI in a UE’s CSF.
  • the gNB receives a CSF reports and determines a CQI value or average CQI value for the UE.
  • the network device determines whether the CQI value is larger than CQI threshold (e.g., a CQI based DMRS reconfiguration threshold) .
  • CQI threshold e.g., a CQI based DMRS reconfiguration threshold
  • the gNB determines whether the average CQI value is greater than a first threshold, such as a THRESHOLD_CQI in T_cqi.
  • the network device determines whether to configure (e.g., reconfigure) the DMRS for with a particular configuration. For example, the gNB determines to configure (e.g., reconfigure) the DMRS for dedicated PDSCH with pos0 responsive to the average CQI value being equal to or greater than THRESHOLD_CQI in T_cqi.
  • the network schedules the PDSCH with the reconfigured DMRS in a particular slot.
  • the gNB transmits a DCI which schedules the PDSCH, with the new DMRS configuration, in a flexible slot.
  • the PDSCH has the new DMRS new configuration, pos0 /1 DMRS symbol.
  • the network device monitors the block error rate (BLER) and the modulation coding scheme (MCS) .
  • BLER block error rate
  • MCS modulation coding scheme
  • the gNB determines a BLER value for the PDSCH transmission and determines whether the BLER values is less than (or greater than) a second threshold (e.g., a BLER threshold, such as 10 percent) .
  • a second threshold e.g., a BLER threshold, such as 10 percent
  • the gNB determines an average MCS value for the PDSCH transmission and determines whether the average MCS value is greater than (or less than) a third threshold (e.g., a MCS threshold, such as an index value of 20) .
  • a MCS threshold such as an index value of 20
  • the network device may monitor the reconfigured PDSCH transmission in the particular slot for the BLER, MCS, or both, and/or may monitor multiple transmissions over multiple slots for the BLER, MCS, or both.
  • the network device may determine both of the BLER and the MCS for a particular period of time, such as T_mon (e.g., 5 seconds) .
  • T_mon e.g., 5 seconds
  • the BLER may be calculated based on received acknowledgement messages (e.g., ACK/NACKs) , and the MCS may be determined by the network device according to normal operating procedures.
  • the network device sets the new DMRS configuration to one or more (e.g., all and/or fixed) DL slots. Responsive to not satisfying the BLER condition, the MCS condition, or both, at 340, the network device reconfigures the DMRS back to the former DMRS configuration, such as pos1.
  • the UE and network device employ a particular type of dynamic DMRS configuration.
  • operation of the network may be enhanced by reducing overhead.
  • Such a reduction in overhead increases throughput and reduces latency and battery consumption, all without sacrificing reliability.
  • FIG. 3C is an example illustration of corresponding thresholds and parameters for the logic diagram of FIG. 3B.
  • a CQI threshold THRESHOLD_CQI
  • the CQI threshold may be expressed in or as an index value.
  • the a default index value for the CQI threshold is 10.
  • FIG. 3C also illustrates a time parameter T_cqi for the CQI threshold.
  • the CQI time parameter, T_cqi may be expressed in seconds.
  • the a default value for the CQI time threshold is 5 seconds.
  • FIG. 3C further illustrates a time parameter T_mon.
  • the time parameter T_mon may also be expressed in seconds.
  • a default value for the T_mon threshold is 5 seconds.
  • the values are examples of defaults values.
  • the network may adjust the default value or change the default value based on operating conditions, operating modes, history data, etc.
  • the time parameters may be expressed in minutes, such as 2 or 10 minutes, in other implementations.
  • FIG. 4 illustrates an example of a wireless communications system 400 that supports dynamic PDSCH configuration in accordance with aspects of the present disclosure.
  • wireless communications system 400 may implement aspects of wireless communication system 100.
  • wireless communications system 400 may include UE 115 and network entity 405.
  • Dynamic PDSCH configuration operations such as CQI and/or BLER value dependent DMRS settings, may increase throughput and reliability by network overhead. Thus, network and device performance can be increased.
  • Network entity 405 and UE 115 UE 115 may be configured to communicate via frequency bands, such as FR1 having a frequency of 410 to 7125 MHz, FR2 having a frequency of 24250 to 52600 MHz for mm-Wave, and/or one or more other frequency bands. It is noted that sub-carrier spacing (SCS) may be equal to 15, 30, 60, or 120 kHz for some data channels.
  • Network entity 405 and UE 115 may be configured to communicate via one or more component carriers (CCs) , such as representative first CC 481, second CC 482, third CC 483, and fourth CC 484. Although four CCs are shown, this is for illustration only, more or fewer than four CCs may be used.
  • One or more CCs may be used to communicate control channel transmissions, data channel transmissions, and/or sidelink channel transmissions.
  • Such transmissions may include a Physical Downlink Control Channel (PDCCH) , a Physical Downlink Shared Channel (PDSCH) , a Physical Uplink Control Channel (PUCCH) , a Physical Uplink Shared Channel (PUSCH) , a Physical Sidelink Control Channel (PSCCH) , a Physical Sidelink Shared Channel (PSSCH) , or a Physical Sidelink Feedback Channel (PSFCH) .
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Uplink Control Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSFCH Physical Sidelink Feedback Channel
  • Each periodic grant may have a corresponding configuration, such as configuration parameters/settings.
  • the periodic grant configuration may include configured grant (CG) configurations and settings. Additionally, or alternatively, one or more periodic grants (e.g., CGs thereof) may have or be assigned to a CC ID, such as intended CC ID.
  • Each CC may have a corresponding configuration, such as configuration parameters/settings.
  • the configuration may include bandwidth, bandwidth part, HARQ process, TCI state, RS, control channel resources, data channel resources, or a combination thereof.
  • one or more CCs may have or be assigned to a Cell ID, a Bandwidth Part (BWP) ID, or both.
  • the Cell ID may include a unique cell ID for the CC, a virtual Cell ID, or a particular Cell ID of a particular CC of the plurality of CCs.
  • one or more CCs may have or be assigned to a HARQ ID.
  • Each CC may also have corresponding management functionalities, such as, beam management, BWP switching functionality, or both.
  • two or more CCs are quasi co-located, such that the CCs have the same beam and/or same symbol.
  • control information may be communicated via network entity 405 and UE 115.
  • the control information may be communicated suing MAC-CE transmissions, RRC transmissions, DCI, transmissions, another transmission, or a combination thereof.
  • UE 115 can include a variety of components (e.g., structural, hardware components) used for carrying out one or more functions described herein.
  • these components can includes processor 402, memory 404, transmitter 410, receiver 412, encoder, 413, decoder 414, PDSCH manager 415, CSF Manager 416, and antennas 252a-r.
  • Processor 402 may be configured to execute instructions stored at memory 404 to perform the operations described herein.
  • processor 402 includes or corresponds to controller/processor 280
  • memory 404 includes or corresponds to memory 282.
  • Memory 404 may also be configured to store CSF information data 406, PDSCH configuration data 408, DMRS configuration data 442, settings data 444, or a combination thereof, as further described herein.
  • the CSF information data 406 includes or corresponds to data associated with or corresponding to channel state feedback information.
  • the CSF information data 406 may include a CSI information and/or CSF report.
  • the CSF information may include or indicate one or more channel quality metric.
  • One such example is CQI information.
  • the CSF information may include a CQI, such as a CQI value.
  • the PDSCH configuration data 408 includes or corresponds to data that indicates a PDSCH configurations.
  • the PDSCH configuration data 408 may indicate a particular determined or indicated PDSCH configuration, such as a PDSCH configuration for downlink and/or a particular RRC mode (e.g., an RRC connected state) .
  • the DMRS configuration data 442 includes or corresponds to data that indicates a DMRS configurations.
  • the DMRS configuration data 442 may indicate a particular determined or indicated DMRS configuration, such as a DMRS configuration for downlink and/or a particular RRC mode (e.g., an RRC connected state) .
  • the DMRS configuration data 442 may correspond to a particular setting of the PDSCH configuration data 408.
  • the settings data 444 includes or corresponds to data associated PDSCH configuration determination.
  • the settings data 444 may include or more thresholds or conditions used for evaluating to switch DMRS settings of a PDSCH configuration.
  • the settings data 444 may include CQI thresholds, CQI indices, BLER thresholds, BLER indices, MCS thresholds, MCS indices, timer parameters, etc.
  • the settings data 444 may include parameters for selecting a threshold form a corresponding index, such as selecting a CQI threshold value from a CQI index.
  • the settings data 444 may include one or more type of dynamic PDSCH configuration modes and/or thresholds or conditions for selecting and/or implementing the PDSCH configurations or modes.
  • Transmitter 410 is configured to transmit data to one or more other devices, and receiver 412 is configured to receive data from one or more other devices.
  • transmitter 410 may transmit data
  • receiver 412 may receive data, via a network, such as a wired network, a wireless network, or a combination thereof.
  • UE 115 may be configured to transmit and/or receive data via a direct device-to-device connection, a local area network (LAN) , a wide area network (WAN) , a modem-to-modem connection, the Internet, intranet, extranet, cable transmission system, cellular communication network, any combination of the above, or any other communications network now known or later developed within which permits two or more electronic devices to communicate.
  • transmitter 410 and receiver 412 may be replaced with a transceiver. Additionally, or alternatively, transmitter 410, receiver, 412, or both may include or correspond to one or more components of UE 115 described with reference to FIG. 2.
  • Encoder 413 and decoder 414 may be configured to encode and decode data for transmission.
  • PDSCH manager 415 may include similar functionality as described with reference to PDSCH manager 430 of network entity 405. Alternatively, PDSCH manager 415 may be configured to implement an indicated PDSCH configuration or setting thereof, such as a DMRS setting thereof.
  • CSF manager 416 may be configured to determine and perform channel state feedback determination and reporting operations. For example, CSF manager 416 is configured to determine CSF information based on receive transmissions, such as a reference signal thereof. To illustrate, CSF manager 416 may determine a CQI (e.g., CQI value) and include the CQI in a transmission to the network entity 405 (e.g., a CSF report) .
  • CQI e.g., CQI value
  • Network entity 405 includes processor 430, memory 432, transmitter 434, receiver 436, encoder 437, decoder 438, PDSCH manager 439, BLER calculator 440, and antennas 234a-t.
  • Processor 430 may be configured to execute instructions stored at memory 432 to perform the operations described herein.
  • processor 430 includes or corresponds to controller/processor 240
  • memory 432 includes or corresponds to memory 242.
  • Memory 432 may be configured to store CSF information data 406, PDSCH configuration data 408, DMRS configuration data 442, settings data 444, or a combination thereof, similar to the UE 115 and as further described herein.
  • Transmitter 434 is configured to transmit data to one or more other devices
  • receiver 436 is configured to receive data from one or more other devices.
  • transmitter 434 may transmit data
  • receiver 436 may receive data, via a network, such as a wired network, a wireless network, or a combination thereof.
  • network entity 405 may be configured to transmit and/or receive data via a direct device-to-device connection, a local area network (LAN) , a wide area network (WAN) , a modem-to-modem connection, the Internet, intranet, extranet, cable transmission system, cellular communication network, any combination of the above, or any other communications network now known or later developed within which permits two or more electronic devices to communicate.
  • transmitter 434 and receiver 436 may be replaced with a transceiver. Additionally, or alternatively, transmitter 434, receiver, 436, or both may include or correspond to one or more components of network entity 405 described with reference to FIG. 2.
  • Encoder 437, and decoder 438 may include the same functionality as described with reference to encoder 413 and decoder 414, respectively.
  • PDSCH manager 439 may be configured to determine and perform PDSCH configuration management and selection operations. For example, PDSCH manager 439 is configured to determine a PDSCH configuration mode based on a CQI, a DL BLER, or both. To illustrate, PDSCH manager 439 may determine a DMRS setting of a PDSCH configuration based on a received CQI value. As another illustration, PDSCH manager 439 may determine to broadly apply or confirm the DMRS setting based on DL BLER.
  • BLER calculator 440 may be configured to determine and perform BLER determination operations.
  • BLER calculator 415 is configured to calculate a DL BLER value based on a particular message, such as a PDSCH with a reconfigured DMRS and/or a PDSCH of a flexible slot (e.g., mini slot /reconfigurable slot) , or set of messages.
  • the network entity 405 includes a MCS determiner.
  • MCS determiner may be configured to determine and perform MCS determination operations.
  • MCS determiner is configured to calculate an average MCS value for a particular time period (e.g., T_mon) , for a set of messages/transmissions.
  • the MCS value and/or average MCS value may be based on (include a MCS value for) a particular message, such as a PDSCH with a reconfigured DMRS and/or a PDSCH of a flexible slot (e.g., reconfigurable slot) .
  • devices of wireless communications system 400 perform dynamic selection and signaling of PDSCH configurations, such as DMRS settings thereof.
  • a UE 115 may generate a CSF message 462 and transmit the CSF message 462 to the network entity 405.
  • the CSF message 462 may indicate or identify a CQI, such as a CQI value.
  • the network entity 405 may obtain a CQI value from the CSF information of the CSF message 462. For example, the network entity 405 may extract the CQI value from a CSF report.
  • the network entity 405 determines PDSCH configuration data 442 based on the CSF information 406 and settings data 444, such as one or more thresholds thereof. For example, the network entity 405 compares the received CQI value to a corresponding threshold value. To illustrate, the network entity 405 determines a CQI threshold value based on a CQI index and a particular CQI index identifier, and then compares the CQI value to the value of the CQI threshold to determine a DMRS settings of a PDSCH configuration. In some implementations, the network entity 405 may determine to switch (e.g., reduce) a DMRS setting of the PDSCH configuration based on the CQI value exceeding the threshold value.
  • the network entity 405 may only switch the DMRS setting for a particular type of slot, such as a flexible slot or slots, or a next slot. In a particular implementation, the network entity 405 may determine to switch the DMRS setting for multiple slots, such as all fixed slots or all slots, based on the CQI value exceeding a second CQI threshold value.
  • the network entity 405 may use the determined PDSCH configuration to generate and transmit a first PDSCH transmission 454. For example, the network entity 405 may transmit a PDSCH transmission that includes a reduced DMRS setting or configuration.
  • the network entity 405 may be configured to transmit PDSCH transmissions with a DMRS setting of 2 DMRS symbols (i.e., pos1) for RRC connected state UEs, such as UE 115, and the network entity 405 may reconfigure the DMRS setting of the PDSCH configuration for RRC connected state UEs to a DMRS setting of a single DMRS symbol (i.e., pos0) .
  • the network entity 405 may dynamically configure PDSCHs.
  • the network entity 405 may further configure the PDSCH by confirming the PDSCH configuration change and/or further applying the PDSCH configuration change.
  • the network entity 405 determines to keep implementing the PDSCH configuration change based on one or more quality determinations, such as DL BLER, MCS, or both.
  • the network entity 405 may then obtain a DL BLER for at least the first PDSCH transmission 454.
  • the network entity 405 receives the DL BLER from the UE 115 or determines the DL BLER based on a message or messages from the UE 115, such an acknowledgment message.
  • the network entity 405 may then obtain a MCS value for at least the first PDSCH transmission 454.
  • the network entity 405 receives an average MCS from the UE 115 or determines the average MCS based on a message or messages from the UE 115, such as an CSF report or acknowledgment message.
  • the network entity 405 may evaluate the DL BLER, MCS, or both, to determine to keep implementing the PDSCH configuration change. For example, the DL BLER and MCS may be compared to a corresponding threshold, or threshold. Based on the comparison or comparisons, the network entity 405 may confirm or reject the configuration change. Exemplary comparisons are described further with reference to FIGS. 3B, 5, and 6.
  • the network entity 405 may use the determined PDSCH configuration to generate and transmit a second PDSCH transmission 456.
  • the network entity 405 may transmit a second PDSCH transmission that includes the reduced DMRS setting or configuration.
  • the network entity 405 may transmit a PDSCH transmission with a DMRS setting of a single DMRS symbol (i.e., pos0) for a particular fixed slot (e.g., a full-length non-reconfigurable downlink slot) of a frame.
  • the network entity 405 and UE 115 may then perform data channel transmissions based on the PDSCH configuration. For example, the network entity 405 transmits downlink data (e.g., PDSCH transmissions) based on PDSCH configuration with the reconfigured DMRS setting (e.g., 1 DMRS symbol) for one or more downlink slots of future frames. Thus, the network entity 405 may be able to configure PDSCHs based on a quality of the channel between the UE 115 and network entity 405.
  • downlink data e.g., PDSCH transmissions
  • the reconfigured DMRS setting e.g., 1 DMRS symbol
  • FIG. 4 describes dynamic PDSCH configuration operations.
  • DMRS based dynamic PDSCH configurations may enable increased throughput and reduced latency via overhead reduction and thus, results in enhanced UE and network performance.
  • FIGS. 5 and 6 illustrate example ladder diagrams for dynamic PDSCH configuration.
  • FIG. 5 is a ladder diagram of an example of CQI and BLER based dynamic PDSCH configuration for a DMRS setting.
  • the network may be able to reduce DMRS overhead based on a channel quality between the UE and network. Additionally, the network may optional, as illustrated and described, check such DMRS settings and/or revert back to original DMRS settings based on actual reception (e.g., BLER) .
  • a base station 105 (e.g., gNB) generates and transmits a reference signal.
  • the base station 105 sends a PDCCH transmission or PDSCH transmission including a reference signal.
  • a UE 115 generates and transmits channel state feedback (CSF) information.
  • CSF channel state feedback
  • the UE 115 generates the CSF information based on the reference signal from the base station 105 and sends a transmission including or indicating a CSF report.
  • the CSF information may include or indicate a channel quality indicator (CQI) .
  • the base station 105 obtains the CQI and evaluates the CQI. For example, the base station 105 extracts an average CQI value from the CSF information and compares the average CQI value to one or more CQI thresholds. To illustrate, the base station 105 determines /retrieves a CQI threshold (e.g., threshold_CQI) from a CQI index based on a CQI threshold setting and compares the average CQI value to the CQI thresholds to determine if the CQI value is greater than or equal to the CQI threshold.
  • a CQI threshold e.g., threshold_CQI
  • the base station 105 Responsive to determining that the average CQI value is greater than or equal to the CQI threshold (threshold_CQI) , the base station 105 determines to make a DMRS setting adjustment. Conversely, responsive to determining that the average CQI value is less than or equal to the CQI threshold (threshold_CQI) , the base station 105 determines to not make a DMRS setting adjustment.
  • the base station 105 configures a DMRS setting of a PDSCH for a particular slot based on the CQI value being greater than or equal to the CQI threshold (threshold_CQI) .
  • the base station 105 configures a flexible slot (e.g., a mini slot of a slot or a reconfigurable slot of a frame) with a particular DMRS setting different from a default DMRS setting.
  • the base station 105 sets the DMRS of the PDSCH for the flexible slot to 1 DMRS symbol, such as pos0.
  • the base station 105 generates and transmits a PDSCH transmission for the particular slot based on the reconfigured PDSCH configuration (e.g., the new DMRS setting) .
  • the base station 105 transmits a PDSCH transmission with 1 DMRS symbol for a mini slot or a reconfigurable slots, such as a slot with less than 14 symbols.
  • the base station 105 determines a downlink BLER for the PDSCH transmission of the particular slot.
  • the base station 105 may calculate the BLER or receive the BLER from the UE 115.
  • the base station 105 may receive a transmission from the UE 115 indicating the DL BLER value for the PDSCH transmission of the particular slot.
  • the base station 105 may receive an acknowledge message (e.g., ACK or NACK) from the UE 115, and may determine the DL BLER value for the PDSCH transmission of the particular slot based on the acknowledge message.
  • ACK or NACK acknowledge message
  • the base station 105 evaluates the DL BLER. For example, the base station 105 compares the DL BLER to one or more BLER thresholds. To illustrate, the base station 105 determines /retrieves a BLER threshold (e.g., a BLER threshold value) from a BLER index based on a DL BLER threshold setting and compares the DL BLER value to the DL BLER threshold to determine if the DL BLER value is greater than or equal to the DL BLER threshold value.
  • a BLER threshold e.g., a BLER threshold value
  • the base station 105 Responsive to determining that the DL BLER value is greater than or equal to the DL BLER threshold value (e.g., 10 percent) , the base station 105 determines to undo the DMRS setting adjustment and revert back to a previous active DMRS setting and/or a default DMRS setting (e.g., pos1) . Conversely, responsive to determining that the DL BLER value is less than or equal to the DL BLER threshold value, the base station 105 determines to apply the DMRS setting adjustment (e.g., reduction) to more or all types of slots, such as fixed and/or full length slots.
  • the DMRS setting adjustment e.g., reduction
  • the base station 105 configures the DMRS setting of the PDSCH for multiple slots based on the DL BLER value being greater than or equal to the DL BLER threshold. For example, the base station 105 configures fixed and/or full length slots with the particular DMRS setting of the particular slot, which is different from the default DMRS setting. To illustrate, the base station 105 sets the DMRS of the PDSCH for non-flexible slots to 1 DMRS symbol, such as pos0.
  • the base station 105 generates and transmits a PDSCH transmission for one or more of the multiple slots based on the reconfigured PDSCH configuration (e.g., the new DMRS setting) .
  • the base station 105 transmits a second PDSCH transmission with 1 DMRS symbol for a full length fixed configuration slot, such as a slot with 14 symbols.
  • the base station 105 may continue to monitor the DL BLER for the second PDSCH transmissions.
  • the base station 105 may revert back to the default DMRS setting based on one or more DL BLER thresholds. For example, a second threshold (e.g., 20 percent) may be used for a second DL BLER of any PDSCH transmission of the second PDSCH transmission. Additional or alternatively, a third threshold (e.g., 15 percent) may be used for an average DL BLER threshold for DL BLER of the second PDSCH transmissions collectively. Accordingly, the base station 105 may continue to monitor DL operations and dynamically adjust the DMRS of the PDSCH.
  • the UE and network entity employ CQI and BLER based DMRS configuration of a PDSCH. That is, the UE and network can modify PDSCH configurations dynamically.
  • FIG. 6 is a ladder diagram of an example of CQI and MCS based dynamic PDSCH configuration for a DMRS setting.
  • the network may be able to reduce DMRS overhead based on a channel quality between the UE and network. Additionally, the network may optionally, as illustrated and described, check such DMRS settings and/or revert back to original DMRS settings based on transmission settings, such as MCS.
  • a base station 105 (e.g., gNB) generates and transmits a reference signal.
  • the base station 105 sends a PDCCH transmission or PDSCH transmission including a reference signal.
  • a UE 115 generates and transmits channel state feedback (CSF) information.
  • CSF channel state feedback
  • the UE 115 generates the CSF information based on the reference signal from the base station 105 and sends a transmission including or indicating a CSF report.
  • the CSF information may include or indicate a channel quality indicator (CQI) .
  • the base station 105 obtains the CQI and evaluates the CQI. For example, the base station 105 extracts a CQI value from the CSF information and compares the CQI information to one or more CQI thresholds. To illustrate, the base station 105 determines /retrieves a CQI threshold (e.g., threshold_CQI) from a CQI index based on a CQI threshold setting and compares the CQI value to the CQI thresholds to determine if the CQI value is greater than or equal to the CQI threshold.
  • a CQI threshold e.g., threshold_CQI
  • the base station 105 Responsive to determining that the CQI value is greater than or equal to the CQI threshold (threshold_CQI) , the base station 105 determines to make a DMRS setting adjustment. Conversely, responsive to determining that the CQI value is less than or equal to the CQI threshold (threshold_CQI) , the base station 105 determines to not make a DMRS setting adjustment.
  • the base station 105 configures a DMRS setting of a PDSCH for a particular slot based on the CQI value being greater than or equal to the CQI threshold (threshold_CQI) .
  • the base station 105 configures a flexible slot (e.g., a mini slot of a slot or a reconfigurable slot of a frame) with a particular DMRS setting different from a default DMRS setting.
  • the base station 105 sets the DMRS of the PDSCH for the flexible slot to 1 DMRS symbol, such as pos0.
  • the base station 105 generates and transmits a PDSCH transmission for the particular slot based on the reconfigured PDSCH configuration (e.g., the new DMRS setting) .
  • the base station 105 transmits a PDSCH transmission with 1 DMRS symbol for a mini slot or a reconfigurable slots, such as a slot with less than 14 symbols.
  • the base station 105 determines a MCS based in part on the PDSCH transmission of the particular slot.
  • the base station 105 may determine or receive the MCS (e.g., an average MCS) from the UE 115.
  • the base station 105 may receive a transmission from the UE 115 indicating channel state feedback and the base station 105 may determine the MCS index value for a past N number of transmissions, including the PDSCH transmission of the particular slot, based on the channel state feedback.
  • the base station 105 may determine a signal-to-noise ratio (SINR) and determine the MCS (e.g., MCS index value) based on the SINR.
  • SINR signal-to-noise ratio
  • Other conventional methods of MCS /average MCS determination may be used.
  • the base station 105 evaluates the MCS. For example, the base station 105 compares the MCS index value to one or more MCS thresholds. To illustrate, the base station 105 determines /retrieves a MCS threshold (e.g., a MCS threshold value) from a MCS index based on a MCS threshold setting and compares the MCS value to the MCS threshold to determine if the MCS value is greater than or equal to the MCS threshold value.
  • a MCS threshold e.g., a MCS threshold value
  • the base station 105 Responsive to determining that the MCS value is greater than or equal to the MCS threshold value (e.g., an index value of 20) , the base station 105 determines to apply the DMRS setting adjustment (e.g., reduction) to more or all types of slots, such as fixed and/or full length slots. Conversely, responsive to determining that MCS value is greater than or equal to the MCS threshold value (e.g., an index value of 20) , the base station 105 determines to undo the DMRS setting adjustment and revert back to a previous active DMRS setting and/or a default DMRS setting (e.g., pos1) . Higher MCS index values indicate higher modulation order settings and/or higher target code rates, and thus result in better spectral efficiency /usage.
  • the MCS threshold value e.g., an index value of 20
  • the base station 105 configures the DMRS setting of the PDSCH for multiple slots based on the MCS value being greater than or equal to the DL MCS threshold. For example, the base station 105 configures fixed and/or full length slots with the particular DMRS setting of the particular slot, which is different from the default DMRS setting. To illustrate, the base station 105 sets the DMRS of the PDSCH for non-flexible slots to 1 DMRS symbol, such as pos0.
  • the base station 105 generates and transmits a PDSCH transmission for one or more of the multiple slots based on the reconfigured PDSCH configuration (e.g., the new DMRS setting) .
  • the base station 105 transmits a second PDSCH transmission with 1 DMRS symbol for a full length fixed configuration slot, such as a slot with 14 symbols.
  • the base station 105 may continue to monitor the MCS for the second PDSCH transmissions.
  • the base station 105 may revert back to the default DMRS setting based on one or more MCS thresholds. For example, a second threshold (e.g., 20 percent) may be used for a second MCS of any PDSCH transmission of the second PDSCH transmission. Additional or alternatively, a third threshold (e.g., 15 percent) may be used for an average MCS threshold for MCS of the second PDSCH transmissions collectively. Accordingly, the base station 105 may continue to monitor DL operations and dynamically adjust the DMRS of the PDSCH.
  • the UE and network entity employ CQI and MCS based DMRS configuration of a PDSCH. That is, the UE and network can modify PDSCH configurations dynamically.
  • FIGS. 3B, 4, 5, and/or 6 may be added, removed, substituted in other implementations.
  • the network entity may use BLER as in FIG. 5 and MCS as in FIG. 6 to determine to keep a reconfigured DMRS setting of a PDSCH.
  • FIG. 5 illustrates an example process which first checks the proposed reduced DMRS setting of the PDSCH on a shorter transmission (e.g., PDSCH with less than 14 symbols)
  • the reduced DMRS setting may be implemented for all types of slots /PDSCH types or lengths based on a CQI or other quality determination alone, and then a BLER or other reception success metric may be used to revert back to a default PDSCH configuration (e.g., a default DMRS setting, such as pos1 /2 DMRS symbols) .
  • a transmission setting or parameter such as MCS, may be used.
  • FIG. 7 is a flow diagram illustrating example blocks executed by wireless communication device configured according to another aspect of the present disclosure. The example blocks will also be described with respect to UE 115 as illustrated in FIG. 9.
  • FIG. 9 is a block diagram illustrating UE 115 configured according to one aspect of the present disclosure.
  • UE 115 includes the structure, hardware, and components as illustrated for UE 115 of FIG. 2.
  • UE 115 includes controller/processor 280, which operates to execute logic or computer instructions stored in memory 282, as well as controlling the components of UE 115 that provide the features and functionality of UE 115.
  • UE 115 under control of controller/processor 280, transmits and receives signals via wireless radios 900a-r and antennas 252a-r.
  • Wireless radios 900a-r includes various components and hardware, as illustrated in FIG. 2 for UE 115, including modulator/demodulators 254a-r, MIMO detector 256, receive processor 258, transmit processor 264, and TX MIMO processor 266.
  • memory 282 stores RRC connected state logic 902, PDSCH configuration logic 903, DMRS configuration logic 904, CSF determination logic 905, CQI determination logic 906, and settings data 907.
  • a wireless communication device such as a UE transmits a message including channel state feedback
  • the channel state feedback include a CQI configured to enable the network entity to perform dynamic PDSCH configuration.
  • the UE 115 determines a CQI and transmits the CQI in a CSF report, as described with reference to FIGS. 3B and 4-6.
  • the UE 115 receives a first PDSCH having a first DMRS configuration for a particular slot. For example, the UE 115 receives a PDSCH having one DMRS symbol in a reconfigurable slot that was configured for DL, as described with reference to FIGS. 3B and 4-6.
  • the UE 115 transmits an acknowledgment message responsive to the first PDSCH transmission. For example, the UE 115 transmits an ACK/NACK to indicate if the UE 115 was able to decode the first PDSCH, as described with reference to FIGS. 3B and 4-6.
  • the acknowledgment message enable the network to calculate DL BLER.
  • the UE 115 receives a second PDSCH having the first DMRS configuration for a second particular slot, the second particular slot having a second type of slot configuration different from a first type of slot configuration of the particular slot.
  • the UE 115 receives multiple PDSCHs for fixed DL slots having the reduced DMRS configuration, as described with reference to FIGS. 3B and 4-6.
  • the UE may receive additional PDSCHs having an original or default setting for one or more slots, such as for fixed slots.
  • the UE 115 may receive additional PDSCHs with the new DMRS setting in other particular types of slots (e.g., reconfigurable slots) .
  • the UE may be able to still decode fixed slot PDSCHs without penalty while a network is attempting to decide to implement the new DMRS setting more broadly.
  • the UE 115 may execute additional blocks (or the UE 115 may be configured further to perform additional operations) in other implementations. For example, the UE 115 may perform one or more operations described above. As another example, the UE 115 may perform one or more of the aspects below.
  • the UE is operating in an RRC connected mode.
  • the DMRS setting includes or corresponds to a DMRS additional position setting (e.g., dmrs-AdditionalPosition) of a PDSCH configuration setup resource (e.g., information element) .
  • a DMRS additional position setting e.g., dmrs-AdditionalPosition
  • a PDSCH configuration setup resource e.g., information element
  • the DMRS additional position setting is set to pos0.
  • the DMRS setting indicates that a PDSCH includes a single DMRS symbol.
  • the PDSCH configuration is for a Mapping Type A PDSCH.
  • the particular slot is a flexible slot (e.g., a reconfigurable slot of a frame) .
  • the flexible slot is of a first frame.
  • the UE 115 receives a PDSCH transmission for the flexible slot, the PDSCH transmission including the DMRS setting.
  • the UE 115 receives a PDSCH transmission for at least one slot of the multiple slots, the PDSCH transmission including the DMRS setting.
  • the at least one slot of the multiple slots is of a second frame, the second frame different from a first frame that included the particular slot.
  • the multiple slots are fixed (e.g., non-reconfigurable) slots of a frame.
  • the UE 115 determines a second CQI value for second channel state feedback, and maintains an active DMRS setting of the PDSCH configuration based on the second CQI value being less than the CQI threshold.
  • the UE 115 determines a second CQI value for second channel state feedback.
  • a DMRS additional position setting of the PDSCH configuration is set to pos1 for the default DMRS setting.
  • the default DMRS setting indicates that the PDSCH includes two DMRS symbols.
  • the UE 115 receives a particular PDSCH transmission for the particular slot, the particular PDSCH having a second DMRS configuration different than a first default DMRS configuration, and determines the DL BLER for the particular PDSCH transmission.
  • the UE 115 prior to receiving the CSF, the UE 115 receives a reference signal, the reference signal is configured to enable the UE to determine the CSF.
  • the base station 105 transmits a DCI scheduling the PDSCH transmission.
  • the UE 115 receives a PDSCH configuration message (e.g., RRC) indicating the DMRS setting.
  • a PDSCH configuration message e.g., RRC
  • the CQI threshold is a CQI index value.
  • the CQI threshold is 10
  • the CQI is an average CQI value for a particular time period (e.g., T_cqi) .
  • the BLER threshold is 10 percent
  • the BLER is an average BLER for a particular time period (e.g., T_mon) .
  • the MCS threshold is an index value of 20
  • the MCS is an average MCS for a particular time period (e.g., T_mon) .
  • the message is a channel state information (CSI) feedback report message.
  • CSI channel state information
  • the message is PUSCH transmission.
  • the UE 115 prior to receiving the message, receives a prior PDSCH transmission, the prior PDSCH transmission having a default DMRS setting (e.g., pos1) .
  • a default DMRS setting e.g., pos1
  • a UE and a base station may perform dynamic PDSCH configuration.
  • dynamic PDSCH configuration By performing dynamic PDSCH configuration, throughput and reliability may be increased.
  • FIG. 8 is a flow diagram illustrating example blocks executed by wireless communication device configured according to another aspect of the present disclosure. The example blocks will also be described with respect to base station 105 (e.g., gNB) as illustrated in FIG. 10.
  • FIG. 10 is a block diagram illustrating base station 105 configured according to one aspect of the present disclosure.
  • Base station 105 includes the structure, hardware, and components as illustrated for base station 105 of FIG. 2.
  • base station 105 includes controller/processor 240, which operates to execute logic or computer instructions stored in memory 242, as well as controlling the components of base station 105 that provide the features and functionality of base station 105.
  • Base station 105 under control of controller/processor 240, transmits and receives signals via wireless radios 1001a-t and antennas 234a-t.
  • Wireless radios 1001a-t includes various components and hardware, as illustrated in FIG. 2 for base station 105, including modulator/demodulators 232a-t, MIMO detector 236, receive processor 238, transmit processor 220, and TX MIMO processor 230.
  • memory 242 stores RRC connected state logic 1002, PDSCH configuration logic 1003, DMRS configuration logic 1004, BLER determination logic 1005, MCS determination logic 1006, and settings data 1007.
  • One of more of 1002-100 may include or correspond to one of 902-907.
  • a wireless communication device such as a base station receives a message including channel state feedback from a UE.
  • the base station 105 receives CSF report including a CQI, as described with reference to FIGS. 3B and 4-6.
  • the base station 105 determines a CQI value based on the channel state feedback. For example, the base station 105 extracts or obtains the CQI value from the CSF Report, as described with reference to FIGS. 3B and 4-6.
  • the base station 105 configures a DMRS setting of a PDSCH configuration for a particular slot based on the CQI value being greater than a CQI threshold. For example, the base station 105 adjusts a DMRS additional position setting of a PDSCH configuration resource for a particular slot (e.g., a reconfigurable type slot, such as slot type “X” which can be set as either DL or UL) based on comparing an average CQI value to a CQI threshold, as described with reference to FIGS. 3B and 4-6.
  • a DMRS additional position setting of a PDSCH configuration resource for a particular slot e.g., a reconfigurable type slot, such as slot type “X” which can be set as either DL or UL
  • the base station may refrain from sending PDSCHs in other slots with the new DMRS setting (e.g., pos0 or one DMRS symbol) .
  • the base station 105 may transmit one or more PDSCHs in fixed slots of the same frame and/or different frames with the default DMRS setting (e.g., pos1 or two DMRS symbols) .
  • the base station 105 configures the DMRS setting of the PDSCH configuration for multiple slots based on a DL BLER of a PDSCH transmission for the particular slot being less than a BLER threshold and based on a MCS value of the PDSCH transmission for the particular slot being greater than a MCS threshold. For example, the base station 105 adjusts the DMRS additional position setting of a PDSCH configuration resource for a multiple slots (e.g., fixed slots which are either DL or UL) based on comparing an average DL BLER value to a BLER threshold and an average MCS value to a MCS threshold for a period of time (e.g., T_mon) , as described with reference to FIGS. 3B and 4-6.
  • a multiple slots e.g., fixed slots which are either DL or UL
  • the base station 105 may execute additional blocks (or the base station 105 may be configured further to perform additional operations) in other implementations.
  • the base station 105 may perform one or more operations described above.
  • the UE 115 may perform one or more of the aspects below.
  • the UE is operating in an RRC connected mode.
  • the DMRS setting includes or corresponds to a DMRS additional position setting (e.g., dmrs-AdditionalPosition) of a PDSCH configuration setup resource (e.g., information element) .
  • a DMRS additional position setting e.g., dmrs-AdditionalPosition
  • a PDSCH configuration setup resource e.g., information element
  • the DMRS additional position setting is set to pos0.
  • the DMRS setting indicates that a PDSCH includes a single DMRS symbol.
  • the PDSCH configuration is for a Mapping Type A PDSCH.
  • the particular slot is a flexible slot (e.g., a reconfigurable slot of a frame) .
  • the flexible slot is of a first frame.
  • the base station 105 transmits a PDSCH transmission for the flexible slot, the PDSCH transmission including the DMRS setting.
  • the base station 105 transmits a PDSCH transmission for at least one slot of the multiple slots, the PDSCH transmission including the DMRS setting.
  • the at least one slot of the multiple slots is of a second frame, the second frame different from a first frame that included the particular slot.
  • the multiple slots are fixed (e.g., non-reconfigurable) slots of a frame.
  • the base station 105 determines a second CQI value based on second channel state feedback, and maintains an active DMRS setting of the PDSCH configuration based on the second CQI value being less than the CQI threshold.
  • the base station 105 determines a second CQI value based on second channel state feedback.
  • the base station 105 also configures the DMRS setting of the PDSCH configuration for a second particular slot based on the second CQI value being greater than a second CQI threshold, and configures the DMRS setting of the PDSCH configuration for multiple second slots to a default DMRS setting based on a second downlink BLER of a second PDSCH transmission for the second particular slot being less than the BLER threshold and based on the an average MCS value of the PDSCH transmission for the particular slot being greater than a MCS threshold.
  • a DMRS additional position setting of the PDSCH configuration is set to pos1 for the default DMRS setting.
  • the default DMRS setting indicates that the PDSCH includes two DMRS symbols.
  • the base station 105 transmits a particular PDSCH transmission for the particular slot, the particular PDSCH having a second DMRS configuration different than a first default DMRS configuration, and determines the DL BLER for the particular PDSCH transmission.
  • the base station 105 prior to receiving the CSF, transmits a reference signal, the reference signal is configured to enable the UE to determine the CSF.
  • the base station 105 transmits a DCI scheduling the PDSCH transmission.
  • the base station 105 transmits a PDSCH configuration message (e.g., RRC) indicating the DMRS setting.
  • a PDSCH configuration message e.g., RRC
  • the CQI threshold is a CQI index value.
  • the CQI threshold is 10
  • the CQI is an average CQI value for a particular time period (e.g., T_cqi) .
  • the BLER threshold is 10 percent
  • the BLER is an average BLER for a particular time period (e.g., T_mon) .
  • the MCS threshold is an index value of 20
  • the MCS is an average MCS for a particular time period (e.g., T_mon) .
  • the message is a channel state information (CSI) feedback report message.
  • CSI channel state information
  • the message is PUSCH transmission.
  • the base station 105 prior to receiving the message, transmits a prior PDSCH transmission to the UE, the prior PDSCH transmission having a default DMRS setting (e.g., pos1) .
  • a default DMRS setting e.g., pos1
  • the base station may perform only a portion of the operations described with reference to FIG. 8.
  • a method of wireless communication includes: determining, by a network entity, whether a CQI value for a particular UE is greater than a CQI threshold; configuring, by the network entity, a DMRS setting of a PDSCH configuration for a particular slot based on the CQI value being greater than a CQI threshold; and transmitting, by the network entity, a PDSCH transmission in the particular slot, the PDSCH having the DMRS setting.
  • a method of wireless communication includes: monitoring, by a network entity, a downlink BLER of a reconfigured PDSCH for a particular slot; determining, by the network entity, whether the downlink BLER is less than a BLER threshold; and setting, by the network entity, a PDSCH configuration of the reconfigured PDSCH as an active PDSCH configuration for multiple slots based on the downlink BLER being less than the BLER threshold.
  • a method of wireless communication includes: monitoring, by a network entity, a downlink BLER of a reconfigured PDSCH for a particular slot; determining, by the network entity, whether the downlink BLER is greater than a BLER threshold; and setting, by the network entity, a PDSCH configuration of a former PDSCH as an active PDSCH configuration for multiple slots based on the downlink BLER being greater than the BLER threshold.
  • a method of wireless communication includes: monitoring, by a network entity, a MCS of a reconfigured PDSCH for a particular slot; determining, by the network entity, whether the MCS is greater than a MCS threshold; and setting, by the network entity, a PDSCH configuration of the reconfigured PDSCH as an active PDSCH configuration for multiple slots based on the MCS being greater than the MCS threshold.
  • a method of wireless communication includes: monitoring, by a network entity, a MCS of a reconfigured PDSCH for a particular slot; determining, by the network entity, whether the MCS is less than a MCS threshold; and setting, by the network entity, a PDSCH configuration of a former PDSCH as an active PDSCH configuration for multiple slots based on the MCS being less than the MCS threshold.
  • a UE and a base station may perform dynamic PDSCH configuration.
  • dynamic PDSCH configuration By performing dynamic PDSCH configuration, throughput and reliability may be increased.
  • the functional blocks and modules described herein may comprise processors, electronics devices, hardware devices, electronics components, logical circuits, memories, software codes, firmware codes, etc., or any combination thereof.
  • features discussed herein relating to dynamic PDSCH configuration e.g., DMRS settings of a PDSCH
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional 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.
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
  • the storage medium may be integral to the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the ASIC may reside in a user terminal.
  • the processor and the storage medium may reside as discrete components in a user terminal.
  • the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Computer-readable storage media may be any available media that can be accessed by a general purpose or special purpose computer.
  • such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • a connection may be 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, or digital subscriber line (DSL) , then the coaxial cable, fiber optic cable, twisted pair, or DSL, are included in the definition of medium.
  • DSL digital subscriber line
  • Disk and disc includes compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , hard disk, solid state disk, and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
  • the term “and/or, ” when used in a list of two or more items means that any one of the listed items can be employed by itself, or any combination of two or more of the listed items can be employed.
  • the composition can contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon un aspect, un procédé de communication sans fil pour une entité de réseau comprend la réception, depuis un équipement d'utilisateur (UE), d'un message incluant une information en retour d'état de canal. Le procédé comprend également la détermination d'une valeur d'un indicateur de qualité de canal (CQI) sur la base de l'information en retour d'état de canal. Le procédé comprend la configuration d'un réglage de signal de référence de démodulation (DMRS) d'un canal physique de commande de liaison descendante (PDSCH) pour un créneau particulier selon que la valeur du CQI est plus grande qu'un seuil de CQI. Le procédé comprend en outre la configuration du réglage de DMRS de la configuration de PDSCH pour de multiples créneaux selon qu'un taux d'erreur sur les blocs de liaison descendante (BLER) d'une transmission d'un PDSCH pour le créneau particulier est plus petit qu'un seuil de BLER et selon qu'une valeur de schéma de modulation et codage (MCS) de la transmission du PDSCH pour le créneau particulier est plus grande qu'un seuil de MCS. D'autres aspects et caractéristiques sont également revendiqués et décrits.
PCT/CN2020/093565 2020-05-30 2020-05-30 Configuration dynamique de dmrs dans des réseaux 5g WO2021243481A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/093565 WO2021243481A1 (fr) 2020-05-30 2020-05-30 Configuration dynamique de dmrs dans des réseaux 5g

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/093565 WO2021243481A1 (fr) 2020-05-30 2020-05-30 Configuration dynamique de dmrs dans des réseaux 5g

Publications (1)

Publication Number Publication Date
WO2021243481A1 true WO2021243481A1 (fr) 2021-12-09

Family

ID=78831450

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/093565 WO2021243481A1 (fr) 2020-05-30 2020-05-30 Configuration dynamique de dmrs dans des réseaux 5g

Country Status (1)

Country Link
WO (1) WO2021243481A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023110087A1 (fr) * 2021-12-15 2023-06-22 Nokia Technologies Oy Signalisation de commande
WO2023200538A1 (fr) * 2022-04-12 2023-10-19 Qualcomm Incorporated Amélioration de débit pour des trames radio contenant des créneaux spéciaux de duplexage par répartition dans le temps (tdd) ou des créneaux adaptés au débit tdd/fdd (duplexage par répartition en fréquence)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014149062A1 (fr) * 2013-03-22 2014-09-25 Hitachi, Ltd. Procédé et appareil pour configurer un signal de référence de démodulation dans des réseaux lte avancés
CN105144817A (zh) * 2013-03-28 2015-12-09 夏普株式会社 用于解调参考信号选择的系统和方法
CN106559194A (zh) * 2015-09-25 2017-04-05 夏普株式会社 用户设备、基站及相关方法
US20190052527A1 (en) * 2017-08-10 2019-02-14 At&T Intellectual Property I, L.P. Adapting demodulation reference signal configuration in networks using massive mimo
CN110138525A (zh) * 2018-02-09 2019-08-16 维沃移动通信有限公司 解调参考信号的配置方法、传输方法、终端及网络侧设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014149062A1 (fr) * 2013-03-22 2014-09-25 Hitachi, Ltd. Procédé et appareil pour configurer un signal de référence de démodulation dans des réseaux lte avancés
CN105144817A (zh) * 2013-03-28 2015-12-09 夏普株式会社 用于解调参考信号选择的系统和方法
CN106559194A (zh) * 2015-09-25 2017-04-05 夏普株式会社 用户设备、基站及相关方法
US20190052527A1 (en) * 2017-08-10 2019-02-14 At&T Intellectual Property I, L.P. Adapting demodulation reference signal configuration in networks using massive mimo
CN110138525A (zh) * 2018-02-09 2019-08-16 维沃移动通信有限公司 解调参考信号的配置方法、传输方法、终端及网络侧设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
VIVO: "Remaining details on DMRS design", 3GPP TSG RAN WG1 MEETING #91 R1-1719774, 1 December 2017 (2017-12-01), XP051370450 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023110087A1 (fr) * 2021-12-15 2023-06-22 Nokia Technologies Oy Signalisation de commande
WO2023200538A1 (fr) * 2022-04-12 2023-10-19 Qualcomm Incorporated Amélioration de débit pour des trames radio contenant des créneaux spéciaux de duplexage par répartition dans le temps (tdd) ou des créneaux adaptés au débit tdd/fdd (duplexage par répartition en fréquence)

Similar Documents

Publication Publication Date Title
WO2021072691A1 (fr) Configuration de ressource de référence de csi et de ressource cible de csi pour une estimation prédictive d'informations d'état de canal
US20230239128A1 (en) Joint dl/ul bandwidth techniques in full-duplex mode
US10587298B1 (en) Transmission throttling for emission exposure management
WO2021088043A1 (fr) Configuration d'intervalles de mesure inter-rat
WO2021243481A1 (fr) Configuration dynamique de dmrs dans des réseaux 5g
WO2022000410A1 (fr) Opérations de transfert améliorées par préparation de rapport de mesure
WO2021243300A1 (fr) Opération à base de livre de codes pour duplex intégral de sous-bande en nr
US11825446B2 (en) UE aided fast carrier selection
WO2021253399A1 (fr) Transfert intercellulaire de cellules sur la base d'un historique pour petites cellules
EP4039022A1 (fr) Signalisation d'état tci assistée par un équipement utilisateur (ue) pour la coordination d'interférence
US20220007384A1 (en) Csi-rs triggering offset determination for ue
US20230189175A1 (en) Synchronization signal block (ssb) spatial overloading
US11115990B2 (en) UE autonomous beam selection
EP4165788A1 (fr) Détermination à l'aide d'un ue de modes d'agrégation de porteuses inter-bandes
WO2021168241A1 (fr) Signal de référence (rs) de surveillance de liaison radio (rlm)/détection de défaillance de faisceau (bfd) pour des coreset ayant de multiples états actifs d'indicateur de configuration de transmission (tci)
WO2021108152A1 (fr) Opération à base de trames pour onde millimétrique (mmwave) à contention basée sur le récepteur
WO2022021365A1 (fr) Saut de fréquence à faible complexité pour équipement utilisateur (ue) à capacité réduite
WO2021179303A1 (fr) Rapport de marge de puissance pour un mode de fonctionnement en duplex intégral d'un dispositif
WO2021244453A1 (fr) Indication ttp de liaison latérale trp multiple pour permettre une prédiction cag
WO2024073873A1 (fr) Interférence de liaison croisée améliorée et rapport d'auto-brouillage
US20230269762A1 (en) Multi-beam techniques for small data transfer over preconfigured uplink resources
WO2022011206A1 (fr) Attribution de ressources pour tonalités de réduction de pic

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20939317

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20939317

Country of ref document: EP

Kind code of ref document: A1