WO2021237610A1 - Techniques de planification et de réception de données à faible puissance - Google Patents

Techniques de planification et de réception de données à faible puissance Download PDF

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Publication number
WO2021237610A1
WO2021237610A1 PCT/CN2020/093018 CN2020093018W WO2021237610A1 WO 2021237610 A1 WO2021237610 A1 WO 2021237610A1 CN 2020093018 W CN2020093018 W CN 2020093018W WO 2021237610 A1 WO2021237610 A1 WO 2021237610A1
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WIPO (PCT)
Prior art keywords
slot
data
control information
received
indication
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PCT/CN2020/093018
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English (en)
Inventor
Yuankun ZHU
Hao Zhang
Gang Liu
Chaofeng HUI
Pan JIANG
Fojian ZHANG
Jian Li
Qiang Li
Bo Yu
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Qualcomm Incorporated
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Priority to PCT/CN2020/093018 priority Critical patent/WO2021237610A1/fr
Publication of WO2021237610A1 publication Critical patent/WO2021237610A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to low-power data scheduling and reception techniques for wireless communication systems, such as 5G systems. Certain aspects of the technology discussed below can enable and provide enhanced communication features and techniques for communication systems, including lower power and lower memory usage.
  • 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 can include receiving, by a UE, control information in a first slot.
  • the method can also include determining, by the UE, that data is located in at least one second slot based, at least in part, on the received control information.
  • the method can further include receiving, by the UE, the data in the at least one second slot.
  • an apparatus configured for wireless communication.
  • the apparatus can include means for receiving control information in a first slot.
  • the apparatus can also include means for determining that data is located in at least one second slot based, at least in part, on the received control information.
  • the apparatus can further include means for receiving the data in the at least one second slot.
  • a non-transitory computer-readable medium having program code recorded thereon is provided.
  • the program code can include program code executable by a computer for causing the computer to receive control information in a first slot.
  • the program code can also include program code executable by the computer for causing the computer to determine that data is located in at least one second slot based, at least in part, on the received control information.
  • the program code can further include program code executable by the computer for causing the computer to receive the data in the at least one second slot.
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the at least one processor can be configured to receive control information in a first slot.
  • the at least one processor can also be configured to determine that data is located in at least one second slot based, at least in part, on the received control information.
  • the at least one processor can be further configured to receive the data in the at least one second slot.
  • a method of wireless communication can include transmitting, by a base station, control information in a first slot, wherein the control information includes an indication of where data is located.
  • the method can also include transmitting, by the base station, the data in at least one second slot.
  • an apparatus configured for wireless communication.
  • the apparatus can include means for transmitting control information in a first slot, wherein the control information includes an indication of where data is located.
  • the apparatus can also include means for transmitting the data in at least one second slot.
  • a non-transitory computer-readable medium having program code recorded thereon is provided.
  • the program code can include program code executable by a computer for causing the computer to transmit control information in a first slot, wherein the control information includes an indication of where data is located.
  • the program code can also include program code executable by the computer for causing the computer to transmit the data in at least one second slot.
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the at least one processor can be configured to transmit control information in a first slot, wherein the control information includes an indication of where data is located.
  • the at least one processor can also be configured to transmit the data in at least one second slot.
  • FIG. 1 is a block diagram illustrating details of a wireless communication system according to some aspects 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 aspects of the present disclosure.
  • FIG. 3 is a block diagram illustrating a method for low-power data scheduling and reception according to some aspects of the present disclosure.
  • FIG. 4A is a diagram illustrating an example mapping of control information and associated data for low-power data scheduling and reception according to some aspects of the present disclosure.
  • FIG. 4B is another diagram illustrating another example mapping of control information and associated data for low-power data scheduling and reception according to some aspects of the present disclosure.
  • FIG. 5 is another block diagram illustrating another method for low-power data scheduling and reception according to some aspects of the present disclosure.
  • FIG. 6 is a block diagram conceptually illustrating a design of a UE configured according to some aspects of the present disclosure.
  • FIG. 7 is a block diagram conceptually illustrating a design of a base station (e.g., a gNB) configured according to some aspects of the present disclosure.
  • a base station e.g., a gNB
  • 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. 3 and 5, 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
  • a UE such as UE 115, may receive from a base station, such as base station/gNB 105, control information and data associated with the control information.
  • control information may be used to provide information about associated data, such as scheduling information indicating how the data is scheduled.
  • a UE may process the control information to determine the data schedule and to receive the data according to the scheduling information.
  • control information and the associated data may be transmitted in a same slot.
  • transmitting and receiving control information and data associated with the control information in the same slot may yield unfavorable operations in some instances.
  • FIG. 3 shows a block diagram illustrating a method for low-power data scheduling and reception according to some aspects of the present disclosure.
  • Aspects of method 300 may be implemented with various other aspects of this disclosure described with respect to FIGS. 1-2 and 4 and 6, such as a mobile device/UE.
  • controller/processor 280 of UE 115 may control UE 115 to perform method 300.
  • FIG. 6 is a block diagram conceptually illustrating a design of a UE configured according to some aspects of the present disclosure.
  • UE 115 may include various structures, hardware, and components, such as those 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.
  • the controller/processor 280 can also control 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 601a-r and antennas 252a-r.
  • Wireless radios 601a-r include 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.
  • the controller/processor 280 can be provided with digital signals obtained from sampling received analog wireless signals for purposes of controlling communication operations.
  • FIG. 3 illustrates a method 300 that may be performed by a wireless communication device, such as a UE 115.
  • Method 300 includes, at block 302, a UE receiving control information in a first slot.
  • a base station such as a gNB 105
  • method 300 includes the UE determining that data is located in at least one second slot based, at least in part, on the received control information.
  • Method 300 also includes, at block 306, the UE receiving the data in the at least one second slot.
  • a base station such as a gNB 105, may transmit the data in at least one second slot.
  • the first slot and/or each of the at least one second slot may each include multiple symbols.
  • the actions shown at blocks 302 through 306 of method 300, as well as the actions shown at blocks 502 and 504 of method 500 (described below) may be a subset of the overall operations performed by a UE and/or base station to achieve low-power data scheduling and reception.
  • the relationship between the actions shown at blocks 302 through 306 of method 300, the actions shown at blocks 502 and 504 of method 500, and other operations that are performed by a UE and/or base station to achieve low-power data scheduling and reception may become more evident from a discussion of the overall operations performed by a UE and/or base station to achieve low-power data scheduling and reception.
  • FIG. 4A shows a diagram illustrating an example mapping of control information and associated data for low-power data scheduling and reception according to some aspects of the present disclosure.
  • FIG. 4A shows a first slot, e.g., Slot 0, and at least one second slot, e.g., Slot 1.
  • a slot may refer to a group of symbols used for transmission and/or reception of information, such as control information and/or data.
  • a slot may include multiple symbols.
  • each “symbol” of a slot may refer to a smallest time period that may be allocated, e.g., mapped, for transmission and/or reception of information, such as control information and/or data.
  • all symbols of a slot may be transmitted and/or received in the same frequency band.
  • the same frequency band may be used for transmission and/or reception of information in the symbols of a single slot.
  • the first slot (Slot 0) may include fourteen symbols S0-S13
  • the at least one second slot (Slot 1) may also include fourteen symbols S0-S13.
  • slots may include other numbers of symbols.
  • a slot may include twelve symbols.
  • both slot 0 and slot 1 e.g., the first and second slots, may occupy the same frequency band.
  • the same frequencies may be used to transmit and/or receive the symbols of the first slot (Slot 0) and of the second slot (Slot 1) .
  • control information 410 may be mapped to at least the first symbol (S0) of the first slot (Slot 0) .
  • control information 410 may also be mapped to additional symbols of Slot 0, such as symbol S1 and/or symbol S2.
  • additional symbols of Slot 0 such as symbol S1 and/or symbol S2.
  • control information 410 may be mapped to one or more symbols of Slot 0.
  • a UE may receive control information 410 in a first slot (Slot 0) , as shown at block 302 of FIG. 3. For example, a UE may receive the control information 410 in one or more symbols of the first slot (Slot 0) , such as symbols S0, S1, and/or S2. Similarly, a gNB may transmit control information 410 in the first slot (Slot 0) . For example, a gNB may transmit the control information 410 in one or more symbols of the first slot (Slot 0) , such as symbols S0, S1, and/or S2.
  • control information 410 may include various information, including scheduling information associated with data 420.
  • control information 410 may include an indication of where data 420 associated with control information 410 may be located.
  • control information 410 may include scheduling information that provides an indication of where data 420 associated with control information 410 may be located.
  • control information 410 such as scheduling information of control information 410, may include an indication that data 420 associated with control information 410 is not scheduled in the first slot (Slot 0) .
  • control information 410 such as scheduling information of control information 410, may include an indication that data 420 associated with control information 410 is scheduled in at least one second slot, e.g., Slot 1.
  • a base station may transmit, and a UE may receive, control information 410 that includes an indication that data 420 associated with control information 410 is not scheduled in the first slot (Slot 0) or an indication that data 420 associated with control information 410 is scheduled in at least one second slot, e.g., Slot 1, when the base station determines that communication between the base station and the UE does not require heavy downlink scheduling or that communication between the base station and the UE is not sensitive to latency.
  • downlink video streaming may require heavy downlink scheduling and may be sensitive to latency.
  • a UE may process the received control information 410 and act accordingly. For example, a UE may determine that data 420 associated with control information 410 is located in at least one second slot (Slot 1) based, at least in part, on the received control information 410, as shown at block 304 of FIG. 3. In some aspects, a UE may determine that data 420 is not located in the first slot (Slot 0) based, at least in part, on the received control information 410.
  • a UE may receive, and a base station may transmit, data 420 in accordance with information provided in control information 410, such as the scheduling information of control information 410 or any other indications associated with data 420 provided in control information 410.
  • a UE may receive, and a base station may transmit, data 420 in the at least one second slot, e.g., Slot 1, as shown at block 306 of FIG. 3.
  • a UE may receive, and a base station may transmit, data 420 in at least one second slot (Slot 1) upon determining that data 420 associated with control information 410 is located in the at least one second slot (Slot 1) based, at least in part, on the received control information 410.
  • Slot 1 the at least one second slot
  • the at least one second slot (Slot 1) may be a different slot than the first slot (Slot 0) , and the at least one second slot (Slot 1) may be a slot subsequent to the first slot, e.g., a slot immediately following the first slot (Slot 0) .
  • a base station may not transmit, and a UE may not receive, data 420 in the first slot (Slot 0) .
  • data 420 associated with control information 410 may be received by a UE, and may be transmitted from a base station, in one or more slots after the first slot that includes control information 410, e.g., slot 1 and/or one or more slots subsequent to slot 1 (e.g., a third slot) .
  • FIG. 4B shows another diagram illustrating another example mapping of control information and associated data for low-power data scheduling and reception according to some aspects of the present disclosure. As illustrated by FIGS. 4A and 4B, data 420 is not limited to being scheduled in only Slot 1, i.e., the slot immediately following Slot 0. For example, as illustrated in FIG.
  • data 420 scheduled by control information 410 may be located in a slot after Slot 1, e.g., Slot 3 that is a third slot after Slot 0.
  • the control information 410 located in Slot 0 may schedule data 420 in at least one second slot that includes Slot 1 as shown in FIG. 4A, Slot 3 as shown in FIG. 4B, and/or one or more slots subsequent to Slot 0, such as a slot between Slot 1 and Slot 3, e.g., a Slot 2, and/or other slots subsequent to Slot 3, such as a Slot 4 (not shown) .
  • data 420 associated with control information 410 may not be received by a UE, and may not be transmitted from a base station, in the first slot that includes control information 410, e.g., slot 0.
  • a base station may transmit, and a UE may receive, data 420 in at least one second slot, e.g., Slot 1, Slot 2, Slot 3, and/or additional slots subsequent to Slot 3, when the base station determines that communication between the base station and the UE does not require heavy downlink scheduling or that communication between the base station and the UE is not sensitive to latency.
  • downlink video streaming may require heavy downlink scheduling and may be sensitive to latency.
  • data 420 may be associated with control information 410 in various ways.
  • data 420 may be data that is scheduled by control information 410.
  • data 420 may be data that is scheduled to be decoded by a UE based on control information 410.
  • control information 410 may correspond to information received in a physical downlink control channel (PDCCH) .
  • data 420 may correspond to data received in a physical downlink shared channel (PDSCH) .
  • the first symbol (S0) of the at least one second slot may be used for data 420, as is illustrated in FIG. 4A.
  • the first symbol (S0) of the at least one second slot (Slot 1) may be used for additional control information.
  • the first symbol (S0) of the at least one second slot (Slot 1) may be used to transmit/receive control information that schedules other data in subsequent slots, such as a third slot subsequent to the second slot (Slot 1) .
  • a UE may receive, and a base station may transmit, control information 410 and data 420 in the same frequency resources.
  • control information 410 and data 420 may occupy the same frequency band such that the same frequencies may be used to transmit and/or receive control information 410 and data 420.
  • FIG. 5, as an example, shows another block diagram illustrating another method for low-power data scheduling and reception according to some aspects of the present disclosure.
  • Aspects of method 500 may be implemented with various other aspects of this disclosure described with respect to FIGS. 1-2, 4, and 7, such as a base station/gNB.
  • controller/processor 240 of base station 105 may control base station 105 to perform method 500.
  • FIG. 7 is a block diagram conceptually illustrating a design of a base station (e.g., a gNB) configured according to some aspects of the present disclosure.
  • Base station 105 may include various structures, hardware, and components, such as those 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.
  • the controller/processor 240 can also control 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 701a-t and antennas 234a-t.
  • Wireless radios 701a-t include 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.
  • the controller/processor 240 can be provided with digital signals obtained from sampling received analog wireless signals for purposes of controlling communication operations.
  • FIG. 5 illustrates a method 500 that may be performed by a wireless communication device, such as a gNB 105.
  • Method 500 includes, at block 502, a base station transmitting control information, such as control information 410, in a first slot, such as one or more symbols S0, S1, and/or S2, of slot 0.
  • the first slot may include multiple symbols, and the control information may include an indication of where data, such as data 420, is located.
  • Method 500 also includes, at block 504, the base station transmitting the data, such as data 420, in at least one second slot, such as slot 1.
  • the data 420 may be transmitted as indicated by the control information 410.
  • low-power data scheduling and reception techniques may include a UE receiving from a base station control information in a first slot.
  • the control information may include an indication of where data is located.
  • Low-power data scheduling and reception techniques may also include a UE determining that data is located in at least one second slot based, at least in part, on the received control information.
  • Low-power data scheduling and reception techniques may further include a UE receiving from a base station the data in the at least one second slot.
  • Low-power data scheduling and reception techniques may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the UE may determine that the data is not located in the first slot based, at least in part, on the received control information.
  • control information may include an indication that the data is not scheduled in the first slot.
  • control information includes an indication that the data is scheduled in the at least one second slot.
  • control information may correspond to information received in a physical downlink control channel (PDCCH) and the data may correspond to data received in a physical downlink shared channel (PDSCH) .
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • the UE may receive from the base station the control information and the data in the same frequency resources.
  • the at least one second slot may be different than the first slot, and the at least one second slot may be subsequent to the first slot.
  • 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 may be implemented via specialized processor circuitry, via executable instructions, and/or combinations thereof.
  • 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.

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

Abstract

L'invention concerne des techniques de communication sans fil qui comprennent des techniques de planification et de réception de données de faible puissance pour des systèmes de communication sans fil. Un UE peut recevoir, en provenance d'une station de base, des informations de commande dans un premier intervalle. Les informations de commande peuvent comprendre une indication de l'emplacement de données planifiées par les informations de commande. L'UE peut déterminer que des données sont situées dans au moins un second intervalle sur la base, au moins en partie, des informations de commande reçues. L'UE peut recevoir, en provenance d'une station de base, les données dans la ou les seconds intervalles. D'autres aspects et caractéristiques sont également revendiqués et décrits.
PCT/CN2020/093018 2020-05-28 2020-05-28 Techniques de planification et de réception de données à faible puissance WO2021237610A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3579646A1 (fr) * 2017-02-02 2019-12-11 Ntt Docomo, Inc. Terminal utilisateur et procédé de communication sans fil
EP3629654A1 (fr) * 2018-09-28 2020-04-01 Apple Inc. Amélioration de la programmation entre créneaux pour une nouvelle radio

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3579646A1 (fr) * 2017-02-02 2019-12-11 Ntt Docomo, Inc. Terminal utilisateur et procédé de communication sans fil
EP3629654A1 (fr) * 2018-09-28 2020-04-01 Apple Inc. Amélioration de la programmation entre créneaux pour une nouvelle radio

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CATT: "Indication of NR-PDSCH starting symbol", 3GPP TSG RAN WG1 AH_NR MEETING R1-1700194, 10 January 2017 (2017-01-10), XP051202699 *

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