WO2021102724A1 - Multiples informations de commande de liaison descendante pour ordonnancement de groupe - Google Patents

Multiples informations de commande de liaison descendante pour ordonnancement de groupe Download PDF

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Publication number
WO2021102724A1
WO2021102724A1 PCT/CN2019/121167 CN2019121167W WO2021102724A1 WO 2021102724 A1 WO2021102724 A1 WO 2021102724A1 CN 2019121167 W CN2019121167 W CN 2019121167W WO 2021102724 A1 WO2021102724 A1 WO 2021102724A1
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Prior art keywords
dci
scheduling information
ues
indication
communication
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PCT/CN2019/121167
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English (en)
Inventor
Jing Dai
Chao Wei
Qiaoyu Li
Min Huang
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Qualcomm Incorporated
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Priority to PCT/CN2019/121167 priority Critical patent/WO2021102724A1/fr
Publication of WO2021102724A1 publication Critical patent/WO2021102724A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for multiple downlink control information (DCI) for group scheduling.
  • DCI downlink control information
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, and/or the like) .
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless communication network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) .
  • a user equipment (UE) may communicate with a base station (BS) via the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the BS to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a Node B, a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a New Radio (NR) BS, a 5G Node B, and/or the like.
  • New Radio which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • 3GPP Third Generation Partnership Project
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDM e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)
  • DFT-s-OFDM discrete Fourier transform spread OFDM
  • MIMO multiple-input multiple-output
  • a method of wireless communication may include receiving first group-common downlink control information (GC-DCI) that provides an indication of whether second GC-DCI is to include scheduling information for the UE; receiving the second GC-DCI that selectively provides the scheduling information according to the indication; and transmitting a communication according to the scheduling information based at least in part on whether the second GC-DCI provides the scheduling information.
  • GC-DCI group-common downlink control information
  • a method of wireless communication may include determining whether a UE is to receive scheduling information for a communication; transmitting first GC-DCI that provides an indication of whether second GC-DCI is to include the scheduling information for the UE based at least in part on determining whether the UE is to receive the scheduling information; and transmitting the second GC-DCI that selectively provides the scheduling information for the UE according to the indication.
  • a UE for wireless communication may include memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to receive first GC-DCI that provides an indication of whether second GC-DCI is to include scheduling information for the UE; receive the second GC-DCI that selectively provides the scheduling information according to the indication; and transmit a communication according to the scheduling information based at least in part on whether the second GC-DCI provides the scheduling information.
  • a base station for wireless communication may include memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to determine whether a UE is to receive scheduling information for a communication; transmit first GC-DCI that provides an indication of whether second GC-DCI is to include the scheduling information for the UE based at least in part on determining whether the UE is to receive the scheduling information; and transmit the second GC-DCI that selectively provides the scheduling information for the UE according to the indication.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a UE, may cause the one or more processors to: receive first GC-DCI that provides an indication of whether second GC-DCI is to include scheduling information for the UE; receive the second GC-DCI that selectively provides the scheduling information according to the indication; and transmit a communication according to the scheduling information based at least in part on whether the second GC-DCI provides the scheduling information.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a base station, may cause the one or more processors to: determine whether a UE is to receive scheduling information for a communication; transmit first GC-DCI that provides an indication of whether second GC-DCI is to include the scheduling information for the UE based at least in part on determining whether the UE is to receive the scheduling information; and transmit the second GC-DCI that selectively provides the scheduling information for the UE according to the indication.
  • an apparatus for wireless communication may include means for receiving first GC-DCI that provides an indication of whether second GC-DCI is to include scheduling information for the apparatus; means for receiving the second GC-DCI that selectively provides the scheduling information according to the indication; and means for transmitting a communication according to the scheduling information based at least in part on whether the second GC-DCI provides the scheduling information.
  • an apparatus for wireless communication may include means for determining whether a UE is to receive scheduling information for a communication; means for transmitting first GC-DCI that provides an indication of whether second GC-DCI is to include the scheduling information for the UE based at least in part on determining whether the UE is to receive the scheduling information; and means for transmitting the second GC-DCI that selectively provides the scheduling information for the UE according to the indication.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the accompanying drawings and specification.
  • Fig. 1 is a block diagram conceptually illustrating an example of a wireless communication network, in accordance with various aspects of the present disclosure.
  • Fig. 2 is a block diagram conceptually illustrating an example of a base station in communication with a UE in a wireless communication network, in accordance with various aspects of the present disclosure.
  • Fig. 3 is a diagram illustrating an example of multiple downlink control information (DCI) for group scheduling, in accordance with various aspects of the present disclosure.
  • DCI downlink control information
  • Fig. 4 is a diagram illustrating an example of multiple DCI for group scheduling, in accordance with various aspects of the present disclosure.
  • Fig. 5 is a diagram illustrating an example process performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Fig. 6 is a diagram illustrating an example process performed, for example, by a base station, in accordance with various aspects of the present disclosure.
  • Fig. 1 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced.
  • the wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network.
  • the wireless network 100 may include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station, a NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, a transmit receive point (TRP) , and/or the like.
  • Each BS may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (e.g., three) cells.
  • eNB base station
  • NR BS NR BS
  • gNB gNode B
  • AP AP
  • node B node B
  • 5G NB 5G NB
  • cell may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.
  • Wireless network 100 may also include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that can relay transmissions for other UEs.
  • a relay station 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay station may also be referred to as a relay BS, a relay base station, a relay, and/or the like.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 Watts) .
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.
  • UEs 120 may be dispersed throughout wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like.
  • a UE may be a cellular phone (e.g., a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet) ) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and/or the like, that may communicate with a base station, another device (e.g., remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices.
  • Some UEs may be considered a Customer Premises Equipment (CPE) .
  • UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, and/or the like.
  • a frequency may also be referred to as a carrier, a frequency channel, and/or the like.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another) .
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the like) , a mesh network, and/or the like.
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 shows a block diagram of a design 200 of base station 110 and UE 120, which may be one of the base stations and one of the UEs in Fig. 1.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • Transmit processor 220 may also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS) ) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS) ) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • TX transmit
  • MIMO multiple-input multiple-output
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • the synchronization signals can be generated with location encoding to convey additional information.
  • antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • a channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , and/or the like.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality
  • CQI channel quality indicator
  • one or more components of UE 120 may be included in a housing.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like) , and transmitted to base station 110.
  • modulators 254a through 254r e.g., for DFT-s-OFDM, CP-OFDM, and/or the like
  • the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120.
  • Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240.
  • Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244.
  • Network controller 130 may include communication unit 294, controller/processor 290, and memory 292.
  • Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with multiple downlink control information (DCI) for group scheduling, as described in more detail elsewhere herein.
  • controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 500 of Fig. 5, process 600 of Fig. 6, and/or other processes as described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • memory 242 and/or memory 282 may comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of the base station 110 and/or the UE 120, may perform or direct operations of, for example, process 500 of Fig. 5, process 600 of Fig. 6, and/or other processes as described herein.
  • a scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.
  • UE 120 may include means for receiving first group-common downlink control information (GC-DCI) that provides an indication of whether second GC-DCI is to include scheduling information for the UE 120, means for receiving the second GC-DCI that selectively provides the scheduling information according to the indication, means for transmitting a communication according to the scheduling information based at least in part on whether the second GC-DCI provides the scheduling information, and/or the like.
  • GC-DCI group-common downlink control information
  • such means may include one or more components of UE 120 described in connection with Fig. 2, such as controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and/or the like.
  • base station 110 may include means for determining whether a UE is to receive scheduling information for a communication, means for transmitting first GC-DCI that provides an indication of whether second GC-DCI is to include the scheduling information for the UE based at least in part on determining whether the UE is to receive the scheduling information, means for transmitting the second GC-DCI that selectively provides the scheduling information for the UE according to the indication, and/or the like.
  • such means may include one or more components of base station 110 described in connection with Fig. 2, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller/processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and/or the like.
  • Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.
  • a UE may periodically transmit a relatively large amount of data.
  • a UE may have an associated video camera and may periodically transmit video data in bursts.
  • a base station may perform group scheduling of a plurality of UEs (e.g., UEs associated with video cameras) that transmit data in bursts.
  • the base station may schedule uplink transmissions for one or more of the plurality of UEs in a respective physical resource unit of a set of physical resource units.
  • group scheduling may not enable different UEs to be scheduled with different resource allocations (RAs) (e.g., allocations of more than one resource unit) and/or to be scheduled with different modulation and coding schemes (MCSs) , thereby limiting scheduling flexibility and efficiency.
  • RAs resource allocations
  • MCSs modulation and coding schemes
  • first GC-DCI may provide an indication of whether second GC-DCI is to include scheduling information for a UE, and the second GC-DCI may selectively include the scheduling information for the UE according to the indication.
  • the scheduling information may indicate an RA for the UE and/or an MCS for the UE. In this way, different UEs may be scheduled with respective RAs and/or MCSs.
  • Fig. 3 is a diagram illustrating an example 300 of multiple DCI for group scheduling, in accordance with various aspects of the present disclosure.
  • a UE 120 may communicate with a BS 110 in connection with group scheduling of uplink transmissions.
  • the UE 120 may be associated with MTC or eMTC.
  • the UE 120 may be associated with a video camera, and the UE 120 may transmit video data obtained by the video camera to the BS 110.
  • the BS 110 may determine a scheduling of a plurality of UEs (e.g., UE0-UE3, as shown in Fig. 3) .
  • the BS 110 may determine whether one or more UEs of the plurality of UEs are to receive scheduling information for a communication (e.g., an uplink communication, such as video data) .
  • the BS 110 may determine scheduling information for the one or more UEs that are determined to receive scheduling information.
  • the scheduling information for each of the one or more UEs may provide an RA of one or more physical resource units (e.g., a physical resource unit may include one or more physical resource blocks, one or more resource elements, and/or the like) .
  • the one or more physical resource units may be included in a set of physical resource units associated with the plurality of UEs.
  • the scheduling information for each of the one or more UEs may provide an MCS.
  • scheduling information determined for a first UE and scheduling information determined for a second UE may provide different RAs (e.g., different quantities of physical resource units) .
  • scheduling information determined for a first UE and scheduling information determined for a second UE may provide different MCSs. That is, scheduling information for a UE may indicate a dedicated MCS for the UE that is not common to the one or more UEs that are to receive scheduling information.
  • the BS 110 may transmit, and the UE 120 (as well as the other UEs of the plurality of UEs) may receive, first GC-DCI.
  • the first GC-DCI may provide an indication of whether second GC-DCI is to include scheduling information for the UE 120 (e.g., UE1) . That is, the first GC-DCI may provide respective indications, for the plurality of UEs, of whether the second GC-DCI is to include scheduling information for the plurality of UEs.
  • an indication for a UE may be one of two states: that the second GC-DCI does not include scheduling information for the UE or that the second GC-DCI includes scheduling information for the UE.
  • the first GC-DCI may include a bitmap to provide the respective indications.
  • the bitmap may include a plurality of bits respectively associated with the plurality of UEs (e.g., a 0th bit corresponding to UE0, a 1st bit corresponding to UE1, and so forth) .
  • a value of a bit may provide an indication of whether a UE corresponding to the bit is to receive scheduling information in the second GC-DCI. For example, as shown in Fig.
  • a value of 0 may indicate that the second GC-DCI does not include scheduling information for the UE (e.g., UE0 and UE2)
  • a value of 1 may indicate that the second GC-DCI includes scheduling information for the UE (e.g., UE1 and UE3) .
  • the first GC-DCI may indicate a particular combination of respective indications for the plurality of UEs. For example, a first combination of indications may be 0000 for UE0-UE3, a second combination of indications may be 1000 for UE0-UE3, a third combination of indications may be 1100 for UE0-UE3, and so forth. Accordingly, the first GC-DCI may be a bit string having a quantity of bits that is less than a quantity of the plurality of UEs.
  • the bit string of the first GC-DCI may indicate a particular combination of respective indications for up to a threshold quantity of UEs of the plurality of UEs.
  • the bit string may include a quantity of bits according to Equation 1:
  • M represents the threshold quantity of UEs, and M ⁇ N.
  • M may be a maximum quantity of UEs that is to be indicated in the second GC-DCI.
  • the bit string of the first GC-DCI may indicate a particular combination of respective indications for a particular quantity of UEs of the plurality of UEs.
  • the bit string may include a quantity of bits according to Equation 2:
  • M represents the particular quantity of UEs, and M ⁇ N.
  • M is the quantity of UEs that is to be indicated in the second GC-DCI.
  • the BS 110 may transmit, and the UE 120 (as well as the other UEs of the plurality of UEs) may receive, second GC-DCI.
  • the second GC-DCI may selectively provide the scheduling information for the UE 120 according to the indication for the UE 120 provided in the first GC-DCI. That is, the second GC-DCI may selectively provide respective scheduling information for one or more UEs (e.g., UE1 and UE3) of the plurality of UEs according to respective indications for the plurality of UEs.
  • the second GC-DCI may contain scheduling information for the UE.
  • the first GC-DCI indicates that a UE (e.g., UE1 or UE3) is to receive scheduling information in the second GC-DCI
  • the second GC-DCI may contain scheduling information for the UE.
  • the first GC-DCI does not indicate that a UE (e.g., UE0 or UE2) is to receive scheduling information in the second GC-DCI
  • the second GC-DCI may not contain scheduling information for the UE.
  • the UE 120 may receive the first GC-DCI in a first physical downlink control channel (PDCCH) and may receive the second GC-DCI in a second PDCCH or in a physical downlink shared channel (PDSCH) (e.g., according to scheduling of the first PDCCH) . In such cases, the UE 120 may not receive and/or decode the second GC-DCI, thereby conserving battery of the UE 120, based at least in part on a determination that the first GC-DCI provides an indication that the second GC-DCI does not provide scheduling information for the UE 120. In some aspects, the UE 120 may receive the first GC-DCI and the second GC-DCI in a single PDCCH.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • the UE 120 may transmit, and the BS 110 may receive, a communication according to the scheduling information. That is, the one or more UEs (e.g., UE1 and UE3) that received scheduling information in the second GC-DCI may transmit communications to the BS 110 according to the scheduling information. In this way, the one or more UEs may transmit the communications using respective RAs and/or respective MCSs, thereby improving scheduling flexibility and efficiency.
  • the one or more UEs e.g., UE1 and UE3
  • the one or more UEs may transmit the communications using respective RAs and/or respective MCSs, thereby improving scheduling flexibility and efficiency.
  • Fig. 3 is provided as an example. Other examples may differ from what is described with respect to Fig. 3.
  • Fig. 4 is a diagram illustrating an example 400 of multiple DCI for group scheduling, in accordance with various aspects of the present disclosure.
  • a UE 120 may communicate with a BS 110 in connection with group scheduling of uplink transmissions, as described above in connection with Fig. 3.
  • the BS 110 may determine a scheduling of a plurality of UEs (e.g., UE0-UE3, as shown in Fig. 4) , as described above in connection with Fig. 3.
  • UEs e.g., UE0-UE3, as shown in Fig. 4
  • the BS 110 may transmit, and the UE 120 (as well as the other UEs of the plurality of UEs) may receive, first GC-DCI.
  • the first GC-DCI may provide an indication of whether second GC-DCI is to include scheduling information for the UE 120 (e.g., UE1) . That is, the first GC-DCI may provide respective indications, for the plurality of UEs, of whether the second GC-DCI is to include scheduling information for the plurality of UEs.
  • an indication for a UE may be one of three states: that the UE is not scheduled to transmit a communication, that the UE is scheduled to transmit a communication and the second GC-DCI does not include scheduling information for the UE, or that the UE is scheduled to transmit a communication and the second GC-DCI includes scheduling information for the UE.
  • the first GC-DCI may include a first field and a second field to provide an indication of whether the second GC-DCI is to include the scheduling information for the UE 120 (as well as the other UEs of the plurality of UEs) .
  • the first field may indicate whether the second field includes information for the UE 120.
  • the first field may indicate that the second field does not include information for the UE 120, and therefore the UE 120 is not scheduled to transmit a communication.
  • the first field may indicate that the second field includes information for the UE 120, and therefore the UE 120 is scheduled to transmit a communication.
  • the first field may include a bitmap of a plurality of bits to provide respective indications for the plurality of UEs, in a manner similar to that described above in connection with Fig. 3.
  • a value of a bit may provide an indication of whether a UE corresponding to the bit is to receive information in the second field. For example, as shown in Fig. 4, a value of 0 may indicate that the second field does not include information for the UE (e.g., UE2) , and a value of 1 may indicate that the second field includes information for the UE (e.g., UE0, UE1, and UE3) .
  • the first field may indicate a particular combination of respective indications for the plurality of UEs, in a manner similar to that described above in connection with Fig. 3. Accordingly, the first field may be a bit string having a quantity of bits that is less than a quantity of the plurality of UEs.
  • the bit string of the first field may indicate a particular combination of respective indications for up to a threshold quantity of UEs of the plurality of UEs.
  • the bit string may include a quantity of bits according to Equation 3:
  • K represents the threshold quantity of UEs, and K ⁇ N.
  • K is a maximum quantity of UEs that may be scheduled to transmit a communication.
  • K is a quantity of UEs corresponding to a quantity of physical resource units in a set of physical resource units that are available for allocation to the plurality of UEs.
  • the bit string of the first field may indicate a particular combination of respective indications for a particular quantity of UEs of the plurality of UEs.
  • the bit string may include a quantity of bits according to Equation 4:
  • K represents a quantity of combinations of K UEs out of the plurality of UEs N
  • K represents the particular quantity of UEs
  • K ⁇ N is a maximum quantity of UEs that may be scheduled to transmit a communication.
  • K is a quantity of UEs corresponding to a quantity of physical resource units in a set of physical resource units that are available for allocation to the plurality of UEs.
  • the second field may indicate whether the second GC-DCI includes scheduling information for the UE 120.
  • the second field may indicate that the second GC-DCI does not include scheduling information for the UE 120, and therefore the UE 120 is to transmit a communication using a single physical resource unit and using a common MCS.
  • the second field may indicate that the second GC-DCI includes scheduling information for the UE 120, and therefore the UE 120 is to transmit a communication according to the scheduling information (e.g., using a particular RA and a dedicated MCS) .
  • the second field may include a bitmap of a plurality of bits to provide respective indications for the plurality of UEs, in a manner similar to that described above in connection with Fig. 3.
  • a value of a bit may provide an indication of whether a UE corresponding to the bit is to receive scheduling information in the second GC-DCI.
  • a value of 0 may indicate that the second GC-DCI does not include scheduling information for the UE (e.g., UE3)
  • a value of 1 may indicate that the second GC-DCI includes information for the UE (e.g., UE0 and UE1) .
  • the second field may indicate a particular combination of respective indications for the plurality of UEs, in a manner similar to that described above in connection with Fig. 3. Accordingly, the second field may be a bit string having a quantity of bits that is less than a quantity of the plurality of UEs.
  • the bit string of the second field may indicate a particular combination of respective indications for up to a threshold quantity of UEs of the plurality of UEs.
  • the bit string may include a quantity of bits according to Equation 5:
  • M represents the threshold quantity of UEs
  • M ⁇ K ⁇ N M may be a maximum quantity of UEs that is to be indicated in the second GC-DCI.
  • the bit string of the second field may indicate a particular combination of respective indications for a particular quantity of UEs of the plurality of UEs.
  • the bit string may include a quantity of bits according to Equation 6:
  • M represents the particular quantity of UEs
  • M ⁇ K ⁇ N M is the quantity of UEs that is to be indicated in the second GC-DCI.
  • the first GC-DCI may not include a first field and a second field to represent the three states of an indication.
  • the three states may be jointly coded into a single bit string of the first GC-DCI.
  • the bit string may include a quantity of bits according to Equation 7:
  • N represents a quantity of the plurality of UEs.
  • bit string may include a quantity of bits according to Equation 8:
  • M represents a quantity of combinations of M UEs out of the plurality of UEs N
  • M represents a particular quantity of UEs that are to receive scheduling information in the second GC-DCI
  • N –M represents a particular quantity of UEs that are not to receive scheduling information in the second GC-DCI
  • M ⁇ N represents a quantity of combinations of M UEs out of the plurality of UEs N
  • bit string may include a quantity of bits according to one of Equations 9-12:
  • M represents a maximum quantity or a particular quantity of UEs that is to receive scheduling information in the second GC-DCI, and M ⁇ K ⁇ N.
  • the BS 110 may transmit, and the UE 120 (as well as the other UEs of the plurality of UEs) may receive, second GC-DCI.
  • the second GC-DCI may selectively provide the scheduling information for the UE 120 according to the indication for the UE 120 provided in the first GC-DCI. That is, the second GC-DCI may selectively provide respective scheduling information for one or more UEs (e.g., UE0 and UE1) of the plurality of UEs according to respective indications for the plurality of UEs, as described above in connection with Fig. 3.
  • the UE 120 may receive the first GC-DCI in a first physical downlink control channel (PDCCH) and the second GC-DCI in a second PDCCH or in a physical downlink shared channel (PDSCH) (e.g., according to scheduling of the first PDCCH) .
  • the UE 120 may not receive and/or decode the second GC-DCI, thereby conserving battery of the UE 120, based at least in part on a determination that the first GC-DCI provides an indication that the second GC-DCI does not provide scheduling information for the UE 120.
  • the UE 120 may receive the first GC-DCI and the second GC-DCI in a single PDCCH.
  • the UE 120 may transmit, and the BS 110 may receive, a communication according to the scheduling information. That is, the one or more UEs (e.g., UE1) that received scheduling information in the second GC-DCI may transmit communications to the BS 110 according to the scheduling information. In this way, the one or more UEs may transmit the communications using respective RAs and/or respective MCSs, thereby improving scheduling flexibility and efficiency.
  • the one or more UEs may transmit the communications using respective RAs and/or respective MCSs, thereby improving scheduling flexibility and efficiency.
  • Fig. 5 is a diagram illustrating an example process 500 performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 500 is an example where the UE (e.g., UE 120 and/or the like) performs operations associated with multiple DCI for group scheduling.
  • the UE e.g., UE 120 and/or the like
  • process 500 may include receiving first GC-DCI that provides an indication of whether second GC-DCI is to include scheduling information for a UE (block 510) .
  • the UE e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, and/or the like
  • process 500 may include receiving the second GC-DCI that selectively provides the scheduling information according to the indication (block 520) .
  • the UE e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, and/or the like
  • process 500 may include transmitting a communication according to the scheduling information based at least in part on whether the second GC-DCI provides the scheduling information (block 530) .
  • the UE e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, and/or the like
  • Process 500 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 scheduling information indicates at least one of a resource allocation or a modulation and coding scheme.
  • the indication is that the second GC-DCI does not include the scheduling information or that the second GC-DCI includes the scheduling information.
  • the first GC-DCI includes a bitmap of a plurality of bits that provide respective indications, for a plurality of UEs, of whether the second GC-DCI is to include scheduling information for the plurality of UEs.
  • the first GC-DCI indicates a particular combination of respective indications, for a plurality of UEs, of whether the second GC-DCI is to include scheduling information for the plurality of UEs.
  • the indication is that the UE is not scheduled to transmit the communication, that the UE is scheduled to transmit the communication and the second GC-DCI does not include the scheduling information, or that the UE is scheduled to transmit the communication and the second GC-DCI includes the scheduling information.
  • the first GC-DCI includes a first field and a second field.
  • the first field includes a bitmap of a plurality of bits that provide respective indications, for a plurality of UEs, of whether the second field is to include information for the plurality of UEs.
  • the first field indicates a particular combination of respective indications, for a plurality of UEs, of whether the second field is to include information for the plurality of UEs.
  • the second field includes a bitmap of a plurality of bits that provide respective indications, for a plurality of UEs, of whether the second GC-DCI is to include scheduling information for the plurality of UEs.
  • the second field indicates a particular combination of respective indications, for a plurality of UEs, of whether the second GC-DCI is to include scheduling information for the plurality of UEs.
  • the first GC-DCI indicates a particular combination of respective indications for a plurality of UEs.
  • the first GC-DCI is received in a first PDCCH and the second GC-DCI is received in a second PDCCH.
  • the first GC-DCI is received in a PDCCH and the second GC-DCI is received in a PDSCH.
  • the first GC-DCI and the second GC-DCI are received in a single PDCCH.
  • process 500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 5. Additionally, or alternatively, two or more of the blocks of process 500 may be performed in parallel.
  • Fig. 6 is a diagram illustrating an example process 600 performed, for example, by a BS, in accordance with various aspects of the present disclosure.
  • Example process 600 is an example where the BS (e.g., BS 110 and/or the like) performs operations associated with multiple DCI for group scheduling.
  • the BS e.g., BS 110 and/or the like
  • process 600 may include determining whether a UE is to receive scheduling information for a communication (block 610) .
  • the BS e.g., using controller/processor 240 and/or the like
  • process 600 may include transmitting first GC-DCI that provides an indication of whether second GC-DCI is to include the scheduling information for the UE based at least in part on determining whether the UE is to receive the scheduling information (block 620) .
  • the BS e.g., using controller/processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and/or the like
  • process 600 may include transmitting the second GC-DCI that selectively provides the scheduling information for the UE according to the indication (block 630) .
  • the BS e.g., using controller/processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and/or the like
  • Process 600 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 scheduling information for the UE indicates at least one of a resource allocation or a modulation and coding scheme.
  • the indication is that the second GC-DCI does not include the scheduling information or that the second GC-DCI includes the scheduling information.
  • the first GC-DCI includes a bitmap of a plurality of bits that provide respective indications, for a plurality of UEs, of whether the second GC-DCI is to include scheduling information for the plurality of UEs.
  • the first GC-DCI indicates a particular combination of respective indications, for a plurality of UEs, of whether the second GC-DCI is to include scheduling information for the plurality of UEs.
  • the indication is that the UE is not scheduled to transmit the communication, that the UE is scheduled to transmit the communication and the second GC-DCI does not include the scheduling information, or that the UE is scheduled to transmit the communication and the second GC-DCI includes the scheduling information.
  • the first GC-DCI includes a first field and a second field.
  • the first field includes a bitmap of a plurality of bits that provide respective indications, for a plurality of UEs, of whether the second field is to include information for the plurality of UEs.
  • the first field indicates a particular combination of respective indications, for a plurality of UEs, of whether the second field is to include information for the plurality of UEs.
  • the second field includes a bitmap of a plurality of bits that provide respective indications, for a plurality of UEs, of whether the second GC-DCI is to include scheduling information for the plurality of UEs.
  • the second field indicates a particular combination of respective indications, for a plurality of UEs, of whether the second GC-DCI is to include scheduling information for the plurality of UEs.
  • the first GC-DCI indicates a particular combination of respective indications for a plurality of UEs.
  • the first GC-DCI is transmitted in a first PDCCH and the second GC-DCI is transmitted in a second PDCCH.
  • the first GC-DCI is transmitted in a PDCCH and the second GC-DCI is transmitted in a PDSCH.
  • the first GC-DCI and the second GC-DCI are transmitted in a single PDCCH.
  • process 600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 6. Additionally, or alternatively, two or more of the blocks of process 600 may be performed in parallel.
  • ком ⁇ онент is intended to be broadly construed as hardware, firmware, and/or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, and/or a combination of hardware and software.
  • satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .
  • the terms “has, ” “have, ” “having, ” and/or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Selon divers aspects, la présente invention se rapporte de manière générale à la communication sans fil. Selon certains aspects, un équipement d'utilisateur (UE) peut recevoir des premières informations de commande de liaison descendante communes de groupe (GC-DCI) qui fournissent une indication du fait que des deuxièmes GC-DCI doivent comprendre des informations d'ordonnancement pour l'UE. L'UE peut recevoir les deuxièmes GC-DCI qui fournissent sélectivement les informations d'ordonnancement selon l'indication. L'UE peut transmettre une communication selon les informations d'ordonnancement au moins en partie en fonction du fait que les deuxièmes GC-DCI fournissent les informations d'ordonnancement. L'invention concerne de nombreux autres aspects.
PCT/CN2019/121167 2019-11-27 2019-11-27 Multiples informations de commande de liaison descendante pour ordonnancement de groupe WO2021102724A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180035459A1 (en) * 2016-07-29 2018-02-01 Huawei Technologies Co., Ltd. Coexistence of Grant-Based and Grant-Free Uplink Transmissions in a Channel
US20190320448A1 (en) * 2018-04-13 2019-10-17 Qualcomm Incorporated Preemption indication for low latency communications on dynamically allocated resources
CN110383745A (zh) * 2017-03-10 2019-10-25 高通股份有限公司 超可靠低等待时间通信指示信道化设计
CN110463109A (zh) * 2017-02-06 2019-11-15 瑞典爱立信有限公司 被打孔信号的重传

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180035459A1 (en) * 2016-07-29 2018-02-01 Huawei Technologies Co., Ltd. Coexistence of Grant-Based and Grant-Free Uplink Transmissions in a Channel
CN110463109A (zh) * 2017-02-06 2019-11-15 瑞典爱立信有限公司 被打孔信号的重传
CN110383745A (zh) * 2017-03-10 2019-10-25 高通股份有限公司 超可靠低等待时间通信指示信道化设计
US20190320448A1 (en) * 2018-04-13 2019-10-17 Qualcomm Incorporated Preemption indication for low latency communications on dynamically allocated resources

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