WO2021068228A1 - Configuration de signal de référence de démodulation pour de multiples configurations de canal physique partagé de liaison montante d'autorisation configurée - Google Patents

Configuration de signal de référence de démodulation pour de multiples configurations de canal physique partagé de liaison montante d'autorisation configurée Download PDF

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Publication number
WO2021068228A1
WO2021068228A1 PCT/CN2019/110749 CN2019110749W WO2021068228A1 WO 2021068228 A1 WO2021068228 A1 WO 2021068228A1 CN 2019110749 W CN2019110749 W CN 2019110749W WO 2021068228 A1 WO2021068228 A1 WO 2021068228A1
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Prior art keywords
pusch
dmrs
indication
configuration
configurations
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PCT/CN2019/110749
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English (en)
Inventor
Qiaoyu Li
Chao Wei
Min Huang
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Qualcomm Incorporated
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Priority to PCT/CN2019/110749 priority Critical patent/WO2021068228A1/fr
Publication of WO2021068228A1 publication Critical patent/WO2021068228A1/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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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

Definitions

  • aspects of the present disclosure generally relate to wireless communication and particularly to techniques and apparatuses for demodulation reference signal (DMRS) configuration for multiple configured grant physical uplink shared channel (CG-PUSCH) configurations.
  • DMRS demodulation reference signal
  • 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 a configuration that indicates multiple configured grant physical uplink shared channel (CG-PUSCH) configurations; receiving an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a demodulation reference signal (DMRS) ; and transmitting the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS.
  • CG-PUSCH physical uplink shared channel
  • a method of wireless communication may include transmitting, to a UE a configuration that indicates multiple CG-PUSCH configurations; transmitting, to the UE, an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a DMRS; and receiving the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS.
  • 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 a configuration that indicates multiple CG-PUSCH configurations; receive an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a DMRS; and transmit the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS.
  • 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 transmit, to a UE a configuration that indicates multiple CG-PUSCH configurations; transmit, to the UE, an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a DMRS; and receive the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS.
  • 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 a configuration that indicates multiple CG-PUSCH configurations; receive an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a DMRS; and transmit the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS.
  • 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: transmit, to a UE a configuration that indicates multiple CG-PUSCH configurations; transmit, to the UE, an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a DMRS; and receive the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS.
  • an apparatus for wireless communication may include means for receiving a configuration that indicates multiple CG-PUSCH configurations; means for receiving an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a DMRS; and means for transmitting the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS.
  • an apparatus for wireless communication may include means for transmitting, to a UE a configuration that indicates multiple CG-PUSCH configurations; means for transmitting, to the UE, an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a DMRS; and means for receiving the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS.
  • 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 user equipment (UE) in a wireless communication network, in accordance with various aspects of the present disclosure.
  • UE user equipment
  • Fig. 3 is a block diagram conceptually illustrating an example slot format in accordance with various aspects of the present disclosure.
  • Figs. 4-6 are diagrams illustrating examples of demodulation reference signal (DMRS) configuration for multiple configured grant physical uplink shared channel (CG-PUSCH) configurations, in accordance with various aspects of the present disclosure.
  • DMRS demodulation reference signal
  • Fig. 7 is a diagram illustrating an example process performed, for example, by a user equipment, in accordance with various aspects of the present disclosure.
  • Fig. 8 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 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 for demodulation reference signal (DMRS) configuration for multiple configured grant physical uplink shared channel (CG-PUSCH) configurations, 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 700 of Fig. 7, process 800 of Fig. 8, 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 700 of Fig. 7, process 800 of Fig. 8, 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 a configuration that indicates multiple CG-PUSCH configurations; means for receiving an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a DMRS; means for transmitting the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS; and/or the like.
  • 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 transmitting, to a UE a configuration that indicates multiple CG-PUSCH configurations; means for transmitting, to the UE, an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a DMRS; means for receiving the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS; 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.
  • Fig. 3 is a diagram illustrating an example slot format in accordance with various aspects of the present disclosure.
  • the available time frequency resources may be partitioned into resource blocks.
  • Each resource block may cover a set of subcarriers (for example, 12 subcarriers) in one slot and may include a number of resource elements.
  • Each resource element may cover one subcarrier in one symbol period (for example, in time) and may be used to send one modulation symbol, which may be a real or complex value.
  • Each block may have 14 symbol periods (0-13) as an example.
  • symbol periods 0, 1, and 2 may be a control region for control signaling, and symbol periods 3-13 may be reserved for data.
  • Symbols for a DMRS may be located in, for example, symbol period 2 of the control region.
  • a receiver may use the DMRS to estimate a radio channel for demodulation.
  • the DMRS is UE-specific and may be transmitted only when necessary.
  • Resource elements for the DMRS may be divided into multiple code division multiplexing (CDM) groups.
  • CDM involves combining multiple signals for simultaneous transmission over a common frequency band.
  • a DMRS in a resource block may include up to three CDM groups in symbol period 2, such as CDM group 0, CDM group 1, and CDM group 2. There are twelve subcarriers in a resource block, so there may be four resource elements for each CDM group.
  • the UE may receive data in symbol period 2 for physical downlink shared channel (PDSCH) DMRS configuration.
  • PDSCH physical downlink shared channel
  • the resource elements in CDM group 0 in symbol period 2 may have configuration data
  • resource elements of CDM groups 1 and 2 in symbol period 2 may not have configuration data.
  • a BS may indicate how many CDM groups do not have configuration data.
  • Front-loaded DMRS may be used in NR with one of two types of configurations.
  • Configuration type 1 includes two CDM groups with different a combination of values that support up to 8 ports (i.e., 4 ports per CDM group) .
  • Configuration type 2 includes three CDM groups with different frequency offsets supporting up to 12 ports (i.e., 4 ports per CDM group) .
  • DMRS in each of the two configuration types can be configured with either 1-symbol or 2-symbols.
  • Additional DMRS can be configured by higher layer signaling. For single front-loaded DMRS symbols, the number of additional DMRS can be 0, 1, 2, 3. For two front-loaded DMRS symbols, the number of additional DMRS can be either 0 or 1.
  • additional DMRS may be based on the duration of the scheduled PDSCH or PUSCH.
  • the locations of front-loaded and additional DMRS are based on scheduling type (i.e., type A and B) and also the PUSCH allocation duration.
  • the used DMRS ports and also potential presence of co-scheduled DMRS CDM groups are signaled by downlink control information (DCI) .
  • DCI downlink control information
  • a base station may configure grants for PUSCH, and there are two types of configured grant PUSCH (CG-PUSCH) .
  • Type-1 PUSCH configured grant involves radio resource control (RRC) configuration, reconfiguration, activation, and deactivation.
  • Type-2 PUSCH configured grant involves RRC configuration and reconfiguration, and DCI activation and deactivation.
  • RRC radio resource control
  • a base station may reduce a DMRS density for multiple PUSCH transmissions or within a single PUSCH transmission.
  • a stationary channel used, for example, by a UE with a fixed location (e.g., surveillance camera)
  • the base station may reduce DMRS overhead to improve uplink throughput.
  • DMRS may not be included in the scheduled PUSCH since channel estimation can be based on a previous PUSCH transmission.
  • the UE may thus use DMRS resource elements for data transmission.
  • an explicit indicator in DCI that scheduled the non-CG-PUSCH communication may indicate the presence or absence of DMRS in the scheduled PUSCH transmission.
  • DCI is not used for CG-PUSCH communications.
  • DMRS overhead for uplink CG-PUSCH communications may provide for more efficient use of channel resources and improve overall efficiency of resources used for transmission.
  • a base station 110 may flexibly configure CG-PUSCH communications to improve demodulation (e.g., when channel conditions are poor and/or when the channel changes relatively quickly) or to reduce signaling overhead (e.g., when channel conditions are good and/or when the channel changes relatively slowly) .
  • the base station 110 may configure fewer DMRS (e.g., a smaller DMRS density) to reduce signaling overhead, and for a less stationary channel, the base station 110 may configure more DMRS (e.g., a larger DMRS density) to improve demodulation accuracy.
  • DMRS e.g., a smaller DMRS density
  • Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.
  • Fig. 4 is a diagram illustrating an example 400 of DMRS configuration for multiple CG-PUSCH configurations, in accordance with various aspects of the present disclosure. As shown in Fig. 4, a base station 110 and a UE 120 may communicate with one another.
  • the base station 110 may transmit, to the UE 120, a configuration that indicates multiple configured grant physical uplink shared channel (CG-PUSCH) configurations.
  • the base station 110 may transmit the configuration in a radio resource control (RRC) message, such as an RRC configuration message, an RRC reconfiguration message, and/or the like.
  • RRC radio resource control
  • a CG-PUSCH configuration may indicate a set of uplink resources (e.g., one or more time domain resources, one or more frequency domain resources, one or more spatial domain resources, and/or the like) allocated to the UE 120 for uplink communications (e.g., uplink data) .
  • the set of uplink resources may include periodic resources.
  • the UE 120 may use the set of uplink resources to transmit uplink data without first requesting and receiving an uplink grant for the uplink data, thereby reducing latency and signaling overhead.
  • the UE 120 may be configured with up to twelve CG-PUSCH configurations.
  • Each CG-PUSCH configuration may be associated with a set of CG-PUSCH communications (e.g., periodic CG-PUSCH communications) assigned to a set of resources.
  • the base station 110 may transmit, and the UE 120 may receive, an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a demodulation reference signal (DMRS) .
  • DMRS demodulation reference signal
  • the base station 110 may indicate that one or more CG-PUSCH communications are to include DMRS to improve channel estimation.
  • the base station 110 may indicate that one or more CG-PUSCH communications are not to include DMRS (e.g., are to exclude DMRS) to reduce signaling overhead.
  • the base station 110 may configure a DMRS density based at least in part on one or more measurements indicative of a stability of a communication channel.
  • the base station 110 may configure fewer DMRS (e.g., a smaller DMRS density) , and for a less stationary channel, the base station 110 may configure more DMRS (e.g., a larger DMRS density) .
  • the indication may include a bitmap with a set of bits, where each bit in the set of bits corresponds to a different CG-PUSCH configuration, as described in more detail below in connection with Fig. 5.
  • the indication may include a set of bit groups, where each bit group in the set of bit groups corresponds to a different CG-PUSCH configuration, as described in more detail below in connection with Fig. 6.
  • different values of a bit or a bit group may indicate whether or not to include DMRS for a corresponding CG-PUSCH communication, a DMRS density for a corresponding CG-PUSCH communication, and/or the like.
  • the indication may be a semi-static configuration, and may be transmitted in an RRC message (e.g., in the same message as the multiple CG-PUSCH configurations) .
  • RRC messages may be used to configure, reconfigure, activate, and deactivate CG-PUSCH configurations.
  • the indication of whether a CG-PUSCH communication is to include a DMRS may be included in an RRC message.
  • the indication may be a dynamic indication, and may be included in downlink control information (DCI) (e.g., in a different message than the multiple CG-PUSCH configurations) .
  • DCI downlink control information
  • RRC messages may be used to configure and reconfigure CG-PUSCH configurations
  • DCI may be used to activate and deactivate CG-PUSCH configurations.
  • the indication of whether a CG-PUSCH communication is to include a DMRS may be included in DCI.
  • the DCI may be activation DCI that activates a CG-PUSCH configuration.
  • the indication of whether a CG-PUSCH communication is to include a DMRS may be included in an RRC message (e.g., in the same message as the multiple CG-PUSCH configurations) .
  • a first indication e.g., to include DMRS or use a first DMRS density
  • a second indication e.g., to exclude DMRS or use a second DMRS density
  • a first indication may be indicated in first DCI that occurs earlier in time
  • a second indication may be indicated in second DCI that occurs later in time.
  • the second indication (sometimes referred to as an override indication) may override the first indication (sometimes referred to as an initial indication, a previous indication, a prior indication, and/or the like) .
  • the indication of whether a CG-PUSCH communication of the CG-PUSCH configuration is to include DMRS may indicate a density of the DMRS (e.g., a DMRS density) for the CG-PUSCH configuration.
  • the density may represent a quantity or a percentage of CG-PUSCH communications, of the CG-PUSCH configuration, that are to include DMRS.
  • the density may indicate a periodicity of DMRSs for CG-PUSCH communications configured according to the CG-PUSCH communication (e.g., thereby indicating which CG-PUSCH transmission instances, of the CG-PUSCH communication, are to include DMRS) .
  • the density may indicate that every N CG-PUSCH communications are to include DMRS (e.g., every CG-PUSCH communication, every other CG-PUSCH communication, every N th CG-PUSCH communication, and/or the like) .
  • the density may be indicated as a value K, which may indicate that the first CG-PUSCH communication (e.g., an initial CG-PUSCH communication after the indication of the density) is to include DMRS, the (K+1) th CG-PUSCH communication is to include DMRS, the (2K+1) th CG-PUSCH communication is to include DMRS, and so on.
  • the indication may be included in DCI and/or a medium access control (MAC) control element (CE) that occurs prior to a CG-PUSCH communication for which the indication is to be applied.
  • this indication may override a previous indication or configuration, and may be referred to as an override indication.
  • the CG-PUSCH configuration (e.g., in an RRC configuration) may configure one or more resources to be monitored by the UE 120 for the DCI and/or the MAC CE with the override indication.
  • the override indication, the DCI, the MAC CE, and/or the resources for the DCI and/or the MAC CE may be UE-specific.
  • the override indication may apply to a single CG-PUSCH configuration configured for the UE 120, a set of CG-PUSCH configurations configured for the UE 120, or all CG-PUSCH configurations configured for the UE 120.
  • a mapping between the override indication and the CG-PUSCH configurations to which the override indication is to be applied may be configured in an RRC configuration.
  • the override indication, the DCI, the MAC CE, and/or the resources for the DCI and/or the MAC CE may be for a group of UEs 120 (e.g., a group-common override indication, a group-common DCI, and/or a group-common MAC CE) .
  • a specific UE 120 may be configured (e.g., using an RRC message) with a location index that indicates where to obtain the override indication for the specific UE 120 in the group-common DCI and/or the group-common MAC-CE.
  • the override indication may instruct the UE 120 to switch from not including DMRS for CG-PUSCH communications of a CG-PUSCH configuration to including DMRS for CG-PUSCH communications of the CG-PUSCH configuration.
  • the override indication may instruct the UE 120 to switch from including DMRS for CG-PUSCH communications of a CG-PUSCH configuration to not including DMRS for CG-PUSCH communications of the CG-PUSCH configuration.
  • the override indication may instruct the UE 120 to switch from a first DMRS density for CG-PUSCH communications of a CG-PUSCH configuration to a second DMRS density for CG-PUSCH communications of the CG-PUSCH configuration.
  • the first DMRS density may be more or less dense than the second DMRS density (e.g., a periodicity of DMRS in a set of CG-PUSCH communications may be increased or decreased) .
  • the UE 120 may transmit, to the base station 110, the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS. For example, if the indication indicates that the CG-PUSCH communication is to include the DMRS, then the UE 120 may transmit the CG-PUSCH communication using DMRS. If the indication indicates that the CG-PUSCH communication is not to include the DMRS, then the UE 120 may transmit the CG-PUSCH communication without using DMRS.
  • the UE 120 may include DMRS for some CG-PUSCH transmission instances of a CG-PUSCH configuration and may exclude DMRS for some other CG-PUSCH transmission instances of a CG-PUSCH configuration, according to an indicated DMRS density.
  • the base station 110 may receive and/or demodulate the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS. For example, if the indication indicates that the CG-PUSCH communication is to include the DMRS, then the base station 110 may receive and/or demodulate the CG-PUSCH communication using DMRS. If the indication indicates that the CG-PUSCH communication is not to include the DMRS, then the base station 110 may receive and/or demodulate the CG-PUSCH communication without using DMRS.
  • the base station 110 may receive and/or demodulate some CG-PUSCH transmission instances of a CG-PUSCH configuration using DMRS and may receive and/or demodulate some other CG-PUSCH transmission instances of a CG-PUSCH configuration without using DMRS, according to an indicated DMRS density.
  • a base station 110 may flexibly configure CG-PUSCH communications to improve demodulation (e.g., when channel conditions are poor and/or when the channel changes relatively quickly) or to reduce signaling overhead (e.g., when channel conditions are good and/or when the channel changes relatively slowly) .
  • the base station 110 may configure fewer DMRS (e.g., a smaller DMRS density) to reduce signaling overhead, and for a less stationary channel, the base station 110 may configure more DMRS (e.g., a larger DMRS density) to improve demodulation accuracy.
  • Fig. 4 is provided as an example. Other examples may differ from what is described with respect to Fig. 4.
  • Fig. 5 is a diagram illustrating an example 500 of DMRS configuration for multiple CG-PUSCH configurations, in accordance with various aspects of the present disclosure.
  • Example 500 is an example of a bitmap indication for DMRS configuration for multiple CG-PUSCH configurations.
  • a UE 120 may initially be configured (e.g., using an RRC message) with four CG-PUSCH configurations, shown as CG-PUSCH Config #0, CG-PUSCH Config #1, CG-PUSCH Config #2, and CG-PUSCH Config #3.
  • CG-PUSCH Config #0 may be initially configured with DMRS (e.g., according to an indication in the RRC message)
  • the other three CG-PUSCH configurations (CG-PUSCH Config #1, CG-PUSCH Config #2, and CG-PUSCH Config #3) may be initially configured without DMRS (e.g., according to an indication in the RRC message) .
  • DMRS may be enabled for CG-PUSCH Config #0, and DMRS may be disabled for CG-PUSCH Config #1, CG-PUSCH Config #2, and CG-PUSCH Config #3.
  • each CG-PUSCH communication instance of CG-PUSCH Config #0 for a first time period 510 includes a DMRS 515, as shown.
  • none of the CG-PUSCH communication instances of CG-PUSCH Config #1, CG-PUSCH Config #2, and CG-PUSCH Config #3 include DMRS.
  • the UE 120 may later receive an indication (e.g., in another RRC message, in DCI, in a MAC-CE, and/or the like) to update a DMRS configuration for the CG-PUSCH configurations.
  • the indication may be a bitmap that includes a set of bits. Different bits of the bitmap (e.g., of the set of bits) may correspond to different CG-PUSCH configurations.
  • a first value of a bit (e.g., 1) may indicate that DMRS is enabled for a corresponding CG-PUSCH configuration, and a second value of the bit (e.g., 0) may indicate that DMRS is disabled for a corresponding CG-PUSCH configuration.
  • a first bit (with a value of 1) may correspond to CG-PUSCH Config #0
  • a second bit (with a value of 0) may correspond to CG-PUSCH Config #1
  • a third bit (with a value of 1) may correspond to CG-PUSCH Config #2
  • a fourth bit (with a value of 0) may correspond to CG-PUSCH Config #3.
  • the bitmap of 1010 indicates that DMRS is to be enabled for CG-PUSCH Config #0 and CG-PUSCH Config #2 (e.g., is to remain enabled for CG-PUSCH Config #0 and is to switch from disabled to enabled for CG-PUSCH Config #2) , and that DMRS is to be disabled (e.g., is to remain disabled) for CG-PUSCH Config #1 and CG-PUSCH Config #3.
  • each CG-PUSCH communication instance of CG-PUSCH Config #2 for a second time period 525 includes a DMRS 530 (e.g., in addition to each CG-PUSCH communication instance of CG-PUSCH Config #0) , as shown.
  • a DMRS 530 e.g., in addition to each CG-PUSCH communication instance of CG-PUSCH Config #0
  • none of the CG-PUSCH communication instances of CG-PUSCH Config #1 and CG-PUSCH Config #3 include DMRS in the second time period 525, according to the indication.
  • the UE 120 may receive a configuration that indicates a mapping between bits of the bitmap (e.g., the set of bits) and corresponding CG-PUSCH configurations.
  • the configuration may indicate, for one or more CG-PUSCH configurations, a DMRS density associated with a bit value.
  • a value of 1 represents a DMRS density of 100% (e.g., a DMRS on every CG-PUSCH communication instance of a CG-PUSCH configuration)
  • a value of 0 represents a DMRS density of 0% (e.g., no DMRS on any CG-PUSCH communication instances of a CG-PUSCH configuration) .
  • the UE 120 may be configured with a mapping between a bit value and a DMRS density that is different from 100%or 0%, such as 50% (e.g., a DMRS on every other CG-PUSCH communication instance of a CG-PUSCH configuration) , 25% (e.g., a DMRS on every fourth CG-PUSCH communication instance of a CG-PUSCH configuration) , and/or the like.
  • a number of bits in the bitmap (e.g., in the set of bits) is equal to a maximum number of allowed CG-PUSCH configurations for the UE 120.
  • a number of bits in the bitmap is equal to a configured number of CG-PUSCH configurations for the UE 120.
  • Fig. 5 is provided as an example. Other examples may differ from what is described with respect to Fig. 5.
  • Fig. 6 is a diagram illustrating an example 600 of DMRS configuration for multiple CG-PUSCH configurations, in accordance with various aspects of the present disclosure.
  • Example 600 is an example of a bit group indication for DMRS configuration for multiple CG-PUSCH configurations.
  • a UE 120 may initially be configured (e.g., using an RRC message) with four CG-PUSCH configurations, shown as CG-PUSCH Config #0, CG-PUSCH Config #1, CG-PUSCH Config #2, and CG-PUSCH Config #3.
  • CG-PUSCH Config #0 may be initially configured with a DMRS density of 50%
  • the other three CG-PUSCH configurations (CG-PUSCH Config #1, CG-PUSCH Config #2, and CG-PUSCH Config #3) may be initially configured without DMRS (e.g., with a DMRS density of 0%) .
  • DMRS may be enabled for every other CG-PUSCH communication instance of CG-PUSCH Config #0, and DMRS may be disabled for every CG-PUSCH communication instance of CG-PUSCH Config #1, CG-PUSCH Config #2, and CG-PUSCH Config #3.
  • every other CG-PUSCH communication instance of CG-PUSCH Config #0 for a first time period 610 includes a DMRS 615, as shown.
  • none of the CG-PUSCH communication instances of CG-PUSCH Config #1, CG-PUSCH Config #2, and CG-PUSCH Config #3 include DMRS.
  • the UE 120 may later receive an indication (e.g., in another RRC message, in DCI, in a MAC-CE, and/or the like) to update a DMRS configuration for the CG-PUSCH configurations.
  • the indication may include a set of bit groups (e.g., where each bit group includes two or more bits, shown as two bits per bit group in example 600) .
  • Different bit groups may correspond to different CG-PUSCH configurations.
  • a value of a bit group may indicate a DMRS density for a corresponding CG-PUSCH configuration.
  • Different values of a bit group may indicate different DMRS densities.
  • a first value of a bit group (e.g., 11) indicates a DMRS density of 100%for a corresponding CG-PUSCH configuration
  • a second value of the bit group (e.g., 10) may indicate a DMRS density of 50%for a corresponding CG-PUSCH configuration
  • a third value of the bit group (e.g., 01) may indicate a DMRS density of 25%for a corresponding CG-PUSCH configuration
  • a fourth value of the bit group (e.g., 00) may indicate a DMRS density of 0%for a corresponding CG- PUSCH configuration.
  • example 600 uses two bits in a bit group and the DMRS densities described above, a different number of bits per bit group may be used and/or different DMRS densities corresponding to different bit group values may be used.
  • a first bit group (with a value of 11) may correspond to CG-PUSCH Config #0
  • a second bit group (with a value of 11) may correspond to CG-PUSCH Config #1
  • a third bit group (with a value of 00) may correspond to CG-PUSCH Config #2
  • a fourth bit group (with a value of 00) may correspond to CG-PUSCH Config #3.
  • the bit group indication of 11 11 00 00 indicates that DMRS is to be enabled for every CG-PUSCH communication instance of CG-PUSCH Config #0 and every CG-PUSCH communication instance of CG-PUSCH Config #1, and that DMRS is disabled for every CG-PUSCH communication instance of CG-PUSCH Config #2 and every CG-PUSCH communication instance of CG-PUSCH Config #3.
  • every CG-PUSCH communication instance of CG-PUSCH Config #0 for a second time period 625 (e.g., a later time period) includes a DMRS 630, as shown.
  • every CG-PUSCH communication instance of CG-PUSCH Config #1 for the second time period 625 includes a DMRS 635.
  • none of the CG-PUSCH communication instances of CG-PUSCH Config #2 and CG-PUSCH Config #3 include DMRS in the second time period 625, according to the indication.
  • the UE 120 may receive a configuration that indicates a mapping between bit groups (e.g., in the set of bit groups) and corresponding CG-PUSCH configurations.
  • the configuration may indicate, for one or more CG-PUSCH configurations, a DMRS density associated with a bit group value.
  • a value of 11 represents a DMRS density of 100%
  • a value of 10 represents a DMRS density of 50%
  • a value of 01 represents a DMRS density of 25%
  • a value of 00 represents a DMRS density of 0%.
  • the UE 120 may be configured with a mapping between a bit group value and a DMRS density that is different from the above values, such as 75%, 20%, and/or the like. Additionally, or alternatively, the UE 120 may receive a configuration that indicates a number of bits included in a bit group. In some aspects, a number of bits in a bit group indicates a number of possible configurable DMRS densities for a CG-PUSCH configuration corresponding to the bit group. In some aspects, a number of bit groups in the set of bit groups is equal to a maximum number of allowed CG-PUSCH configurations for the UE 120.
  • a number of bit groups in the set of bit groups is equal to a configured number of CG-PUSCH configurations for the UE 120.
  • the DMRS densities for CG-PUSCH configurations may be flexibly configured with reduced signaling overhead.
  • Fig. 6 is provided as an example. Other examples may differ from what is described with respect to Fig. 6.
  • Fig. 7 is a diagram illustrating an example process 700 performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 700 is an example where the UE (e.g., UE 120 and/or the like) performs operations associated with DMRS configuration for multiple CG-PUSCH configurations.
  • the UE e.g., UE 120 and/or the like
  • process 700 may include receiving a configuration that indicates multiple CG-PUSCH configurations (block 710) .
  • the UE e.g., using receive processor 258, controller/processor 280, memory 282, and/or the like
  • process 700 may include receiving an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a DMRS (block 720) .
  • the UE e.g., using receive processor 258, controller/processor 280, memory 282, and/or the like
  • process 700 may include transmitting the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS (block 730) .
  • the UE e.g., using transmit processor 264, controller/processor 280, memory 282, and/or the like
  • Process 700 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 multiple CG-PUSCH configurations and the indication are included in a radio resource control message.
  • the multiple CG-PUSCH configurations are included in a radio resource control message and the indication is included in downlink control information (DCI) .
  • DCI downlink control information
  • the DCI is activation DCI that activates the CG-PUSCH communication.
  • the indication further indicates a density of the DMRS.
  • the density indicates a periodicity of DMRSs for CG-PUSCH communications configured according to the CG-PUSCH configuration
  • the periodicity indicates which CG-PUSCH transmission instances, of the CG-PUSCH configuration, are to include DMRS.
  • the indication is included in downlink control information (DCI) or a medium access control (MAC) control element (CE) that occurs prior to the CG-PUSCH communication.
  • DCI downlink control information
  • CE medium access control control element
  • the indication in the DCI or the MAC CE overrides the CG-PUSCH configuration or a prior indication.
  • the indication in the DCI or the MAC CE indicates a different DMRS density than a DMRS density configured in the CG-PUSCH configuration.
  • one or more resources for monitoring the DCI or the MAC CE are indicated in the CG-PUSCH configuration.
  • the DCI or the MAC CE is specific to the UE.
  • the indication in the DCI or the MAC CE is specific to the CG-PUSCH configuration.
  • the indication in the DCI or the MAC CE applies to all of the multiple CG-PUSCH configurations.
  • the DCI or the MAC CE is for a group of UEs that include the UE.
  • process 700 includes receiving a configuration that indicates a location, within the DCI or the MAC CE, for the indication for the UE.
  • the indication is specific to the UE.
  • the indication is for a group of UEs that include the UE.
  • the indication includes a bitmap with a set of bits, each bit in the set of bits corresponds to a different CG-PUSCH configuration of the multiple CG-PUSCH configurations, and a first value of a bit indicates that CG-PUSCH communications of a corresponding CG-PUSCH configuration are to include a DMRS and a second value of the bit indicates that the CG-PUSCH communications of the corresponding CG-PUSCH configuration are not to include a DMRS.
  • process 700 includes receiving a configuration that indicates a mapping between bits of the bitmap and corresponding CG-PUSCH configurations.
  • a number of bits in the bitmap is equal to a maximum number of allowed CG-PUSCH configurations for the UE or a configured number of CG-PUSCH configurations for the UE.
  • the indication includes a set of bit groups, each bit group in the set of bit groups corresponds to a different CG-PUSCH configuration of the multiple CG-PUSCH configurations, and a value of a bit group indicates a DMRS density for CG-PUSCH communications of a corresponding CG-PUSCH configuration.
  • process 700 includes receiving a configuration that indicates at least one of: a mapping between is biting groups in the set of bit groups and corresponding CG-PUSCH configurations, a mapping between is biting group values and corresponding DMRS densities, a number of bits is including in a bit group, or a combination thereof.
  • the number of bits in a bit group indicates a number of possible DMRS densities for a corresponding CG-PUSCH configuration.
  • a number of bit groups in the set of bit groups is equal to a maximum number of allowed CG-PUSCH configurations for the UE or a configured number of CG-PUSCH configurations for the UE.
  • transmitting the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS comprises: transmitting the CG-PUSCH communication using a DMRS if the indication indicates that the CG-PUSCH communication is to include the DMRS, or transmitting the CG-PUSCH communication without using a DMRS if the indication indicates that the CG-PUSCH communication is not to include the DMRS.
  • process 700 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 7. Additionally, or alternatively, two or more of the blocks of process 700 may be performed in parallel.
  • Fig. 8 is a diagram illustrating an example process 800 performed, for example, by a base station, in accordance with various aspects of the present disclosure.
  • Example process 800 is an example where the base station (e.g., base station 110 and/or the like) performs operations associated with DMRS configuration for multiple CG-PUSCH configurations.
  • the base station e.g., base station 110 and/or the like
  • process 800 may include transmitting, to a UE a configuration that indicates multiple CG-PUSCH configurations (block 810) .
  • the base station e.g., using transmit processor 220, controller/processor 240, memory 242, and/or the like
  • process 800 may include transmitting, to the UE, an indication of whether a CG-PUSCH communication of a CG-PUSCH configuration, of the multiple CG-PUSCH configurations, is to include a DMRS (block 820) .
  • the base station e.g., using transmit processor 220, controller/processor 240, memory 242, and/or the like
  • process 800 may include receiving the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS (block 830) .
  • the base station e.g., using receive processor 238, controller/processor 240, memory 242, and/or the like
  • Process 800 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.
  • receiving the CG-PUSCH communication based at least in part on the indication of whether the CG-PUSCH communication is to include the DMRS comprises: receiving the CG-PUSCH communication with a DMRS if the indication indicates that the CG-PUSCH communication is to include the DMRS, or receiving the CG-PUSCH communication without a DMRS if the indication indicates that the CG-PUSCH communication is not to include the DMRS.
  • the multiple CG-PUSCH configurations and the indication are included in a radio resource control message.
  • the multiple CG-PUSCH configurations are included in a radio resource control message and the indication is included in downlink control information (DCI) .
  • DCI downlink control information
  • the DCI is activation DCI that activates the CG-PUSCH communication.
  • the indication further indicates a density of the DMRS.
  • the density indicates a periodicity of DMRSs for CG-PUSCH communications configured according to the CG-PUSCH configuration
  • the periodicity indicates which CG-PUSCH transmission instances, of the CG-PUSCH configuration, are to include DMRS.
  • the indication is included in downlink control information (DCI) or a medium access control (MAC) control element (CE) that occurs prior to the CG-PUSCH communication.
  • DCI downlink control information
  • CE medium access control control element
  • the indication in the DCI or the MAC CE overrides the CG-PUSCH configuration or a prior indication.
  • the indication in the DCI or the MAC CE indicates a different DMRS density than a DMRS density configured in the CG-PUSCH configuration.
  • one or more resources for monitoring the DCI or the MAC CE are indicated in the CG-PUSCH configuration.
  • the DCI or the MAC CE is specific to the UE.
  • the indication in the DCI or the MAC CE is specific to the CG-PUSCH configuration.
  • the indication in the DCI or the MAC CE applies to all of the multiple CG-PUSCH configurations.
  • the DCI or the MAC CE is for a group of UEs that include the UE.
  • process 800 includes transmitting a configuration that indicates a location, within the DCI or the MAC CE, for the indication for the UE.
  • the indication is specific to the UE.
  • the indication is for a group of UEs that include the UE.
  • the indication includes a bitmap with a set of bits, each bit in the set of bits corresponds to a different CG-PUSCH configuration of the multiple CG-PUSCH configurations, and a first value of a bit indicates that CG-PUSCH communications of a corresponding CG-PUSCH configuration are to include a DMRS and a second value of the bit indicates that the CG-PUSCH communications of the corresponding CG-PUSCH configuration are not to include a DMRS.
  • process 800 includes transmitting a configuration that indicates a mapping between bits of the bitmap and corresponding CG-PUSCH configurations.
  • a number of bits in the bitmap is equal to a maximum number of allowed CG-PUSCH configurations for the UE or a configured number of CG-PUSCH configurations for the UE.
  • the indication includes a set of bit groups, each bit group in the set of bit groups corresponds to a different CG-PUSCH configuration of the multiple CG-PUSCH configurations, and a value of a bit group indicates a DMRS density for CG-PUSCH communications of a corresponding CG-PUSCH configuration.
  • process 800 includes transmitting a configuration that indicates at least one of: a mapping between is biting groups in the set of bit groups and corresponding CG-PUSCH configurations, a mapping between is biting group values and corresponding DMRS densities, a number of bits is including in a bit group, or a combination thereof.
  • the number of bits in a bit group indicates a number of possible DMRS densities for a corresponding CG-PUSCH configuration.
  • a number of bit groups in the set of bit groups is equal to a maximum number of allowed CG-PUSCH configurations for the UE or a configured number of CG-PUSCH configurations for the UE.
  • process 800 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 8. Additionally, or alternatively, two or more of the blocks of process 800 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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Abstract

Divers aspects de la présente invention concernent de manière générale des communications sans fil. Selon certains aspects, un équipement d'utilisateur (UE) peut recevoir une configuration qui indique de multiples configurations de canal physique partagé de liaison montante d'autorisation configurée (CG-PUSCH); recevoir une indication précisant si une communication de CG-PUSCH d'une configuration de CG-PUSCH, parmi les multiples configurations de CG-PUSCH, doit inclure un signal de référence de démodulation (DMRS); et transmettre la communication de CG-PUSCH sur la base au moins en partie de l'indication précisant si la communication de CG-PUSCH doit inclure le DMRS. L'invention concerne de nombreux autres aspects.
PCT/CN2019/110749 2019-10-12 2019-10-12 Configuration de signal de référence de démodulation pour de multiples configurations de canal physique partagé de liaison montante d'autorisation configurée WO2021068228A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019105330A1 (fr) * 2017-11-29 2019-06-06 华为技术有限公司 Procédé d'identification d'équipement utilisateur dans une transmission sans autorisation, appareil, dispositif et système

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019105330A1 (fr) * 2017-11-29 2019-06-06 华为技术有限公司 Procédé d'identification d'équipement utilisateur dans une transmission sans autorisation, appareil, dispositif et système

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
FUJITSU: "PUSCH enhancements for URLLC", 3GPP DRAFT; R1-1906584 PUSCH ENHANCEMENTS FOR URLLC, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051728035 *
NTT DOCOMO, INC: "Maintenance for DL/UL data scheduling and HARQ procedure", 3GPP DRAFT; R1-1811375, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, 12 October 2018 (2018-10-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, pages 1 - 15, XP051518779 *
QUALCOMM INCORPORATED: "PUSCH Enhancements for eURLLC", 3GPP DRAFT; R1-1907283 PUSCH ENHANCEMENTS FOR EURLLC, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Reno, Nevada, USA; 20190513 - 20190517, 4 May 2019 (2019-05-04), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051709306 *

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