WO2023150957A1 - Commande d'avance temporelle absolue améliorée pour opération de point de réception/transmission multiple de liaison montante - Google Patents

Commande d'avance temporelle absolue améliorée pour opération de point de réception/transmission multiple de liaison montante Download PDF

Info

Publication number
WO2023150957A1
WO2023150957A1 PCT/CN2022/075797 CN2022075797W WO2023150957A1 WO 2023150957 A1 WO2023150957 A1 WO 2023150957A1 CN 2022075797 W CN2022075797 W CN 2022075797W WO 2023150957 A1 WO2023150957 A1 WO 2023150957A1
Authority
WO
WIPO (PCT)
Prior art keywords
tag
absolute
command
serving cell
msga
Prior art date
Application number
PCT/CN2022/075797
Other languages
English (en)
Inventor
Shaozhen GUO
Mostafa KHOSHNEVISAN
Fang Yuan
Yan Zhou
Jing Sun
Xiaoxia Zhang
Tao Luo
Original Assignee
Qualcomm Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2022/075797 priority Critical patent/WO2023150957A1/fr
Publication of WO2023150957A1 publication Critical patent/WO2023150957A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for an enhanced absolute timing advance (TA) command for uplink multiple transmission reception point (mTRP) operation.
  • TA absolute timing advance
  • mTRP uplink multiple transmission reception point
  • 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, 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 network may include one or more base stations that support communication for a user equipment (UE) or multiple UEs.
  • a UE may communicate with a base station via downlink communications and uplink communications.
  • Downlink (or “DL” ) refers to a communication link from the base station to the UE
  • uplink (or “UL” ) refers to a communication link from the UE to the base station.
  • New Radio which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP.
  • 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, using CP-OFDM and/or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDM single-carrier frequency division multiplexing
  • DFT-s-OFDM discrete Fourier transform spread OFDM
  • MIMO multiple-input multiple-output
  • the UE may include a memory and one or more processors coupled to the memory.
  • the one or more processors may be configured to transmit a msgA of a two-step random access channel (RACH) procedure to a network node on a serving cell, wherein the serving cell is associated with a first timing advance group (TAG) and a second TAG.
  • the one or more processors may be configured to receive, from the network node on the serving cell, an absolute timing advance (TA) command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to the first TAG or the second TAG.
  • TA absolute timing advance
  • the network node may include a memory and one or more processors coupled to the memory.
  • the one or more processors may be configured to receive, from a UE, a msgA of a two-step RACH procedure on a serving cell.
  • the one or more processors may be configured to transmit, to the UE on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to a first TAG associated with the serving cell or a second TAG associated with the serving cell.
  • the method may include transmitting a msgA of a two-step RACH procedure to a network node on a serving cell, wherein the serving cell is associated with a first TAG and a second TAG.
  • the method may include receiving, from the network node on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to the first TAG or the second TAG.
  • the method may include receiving, from a UE, a msgA of a two-step RACH procedure on a serving cell.
  • the method may include transmitting, to the UE on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to a first TAG associated with the serving cell or a second TAG associated with the serving cell.
  • Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a UE.
  • the set of instructions when executed by one or more processors of the UE, may cause the UE to transmit a msgA of a two-step RACH procedure to a network node on a serving cell, wherein the serving cell is associated with a first TAG and a second TAG.
  • the set of instructions when executed by one or more processors of the UE, may cause the UE to receive, from the network node on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to the first TAG or the second TAG.
  • Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a network node.
  • the set of instructions when executed by one or more processors of the network node, may cause the network node to receive, from a UE, a msgA of a two-step RACH procedure on a serving cell.
  • the set of instructions when executed by one or more processors of the network node, may cause the network node to transmit, to the UE on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to a first TAG associated with the serving cell or a second TAG associated with the serving cell.
  • the apparatus may include means for transmitting a msgA of a two-step RACH procedure to a network node on a serving cell, wherein the serving cell is associated with a first TAG and a second TAG.
  • the apparatus may include means for receiving, from the network node on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to the first TAG or the second TAG.
  • the apparatus may include means for receiving, from a UE, a msgA of a two-step RACH procedure on a serving cell.
  • the apparatus may include means for transmitting, to the UE on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to a first TAG associated with the serving cell or a second TAG associated with the serving cell.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network node, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.
  • aspects are described in the present disclosure by illustration to some examples, those skilled in the art will understand that such aspects may be implemented in many different arrangements and scenarios.
  • Techniques described herein may be implemented using different platform types, devices, systems, shapes, sizes, and/or packaging arrangements.
  • some aspects may be implemented via integrated chip embodiments or other non-module-component based devices (e.g., end- user devices, vehicles, communication devices, computing devices, industrial equipment, retail/purchasing devices, medical devices, and/or artificial intelligence devices) .
  • Aspects may be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and/or system-level components.
  • Devices incorporating described aspects and features may include additional components and features for implementation and practice of claimed and described aspects.
  • transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and/or summers) .
  • RF radio frequency
  • aspects described herein may be practiced in a wide variety of devices, components, systems, distributed arrangements, and/or end-user devices of varying size, shape, and constitution.
  • Fig. 1 is a diagram illustrating an example of a wireless network, in accordance with the present disclosure.
  • Fig. 2 is a diagram illustrating an example of a base station in communication with a user equipment (UE) in a wireless network, in accordance with the present disclosure.
  • UE user equipment
  • Fig. 3 is a diagram illustrating an example disaggregated base station architecture, in accordance with the present disclosure.
  • Fig. 4 is a diagram illustrating an example of transmission reception point (TRP) differentiation at a UE based at least in part on a control resource set (CORESET) pool index, in accordance with the present disclosure.
  • TRP transmission reception point
  • CORESET control resource set
  • Fig. 5 is a diagram illustrating an example of a two-step random access procedure, in accordance with the present disclosure.
  • Figs. 6A-6B are diagrams illustrating examples associated with an enhanced absolute timing advance (TA) command for uplink multi-TRP (mTRP) operation, in accordance with the present disclosure.
  • TA enhanced absolute timing advance
  • Figs. 7-8 are diagrams illustrating example processes associated with an enhanced absolute TA command for uplink mTRP operation, in accordance with the present disclosure.
  • Figs. 9-10 are diagrams of example apparatuses for wireless communication, in accordance with the present disclosure.
  • NR New Radio
  • RAT radio access technology
  • Fig. 1 is a diagram illustrating an example of a wireless network 100, in accordance with the present disclosure.
  • the wireless network 100 may be or may include elements of a 5G (e.g., NR) network and/or a 4G (e.g., Long Term Evolution (LTE) ) network, among other examples.
  • the wireless network 100 may include one or more base stations 110 (shown as a BS 110a, a BS 110b, a BS 110c, and a BS 110d) , a user equipment (UE) 120 or multiple UEs 120 (shown as a UE 120a, a UE 120b, a UE 120c, a UE 120d, and a UE 120e) , and/or other network entities.
  • UE user equipment
  • a base station 110 is an entity that communicates with UEs 120.
  • a base station 110 (sometimes referred to as a BS) may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G) , a gNB (e.g., in 5G) , an access point, and/or a transmission reception point (TRP) .
  • Each base station 110 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a base station 110 and/or a base station subsystem serving this coverage area, depending on the context in which the term is used.
  • a base station 110 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 120 with service subscriptions.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs 120 having association with the femto cell (e.g., UEs 120 in a closed subscriber group (CSG) ) .
  • CSG closed subscriber group
  • a base station 110 for a macro cell may be referred to as a macro base station.
  • a base station 110 for a pico cell may be referred to as a pico base station.
  • a base station 110 for a femto cell may be referred to as a femto base station or an in-home base station.
  • the BS 110a may be a macro base station for a macro cell 102a
  • the BS 110b may be a pico base station for a pico cell 102b
  • the BS 110c may be a femto base station for a femto cell 102c.
  • a base station may support one or multiple (e.g., three) cells.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a base station 110 that is mobile (e.g., a mobile base station) .
  • the base stations 110 may be interconnected to one another and/or to one or more other base stations 110 or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces, such as a direct physical connection or a virtual network, using any suitable transport network.
  • the wireless network 100 may include one or more relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a base station 110 or a UE 120) and send a transmission of the data to a downstream station (e.g., a UE 120 or a base station 110) .
  • a relay station may be a UE 120 that can relay transmissions for other UEs 120.
  • the BS 110d e.g., a relay base station
  • the BS 110a e.g., a macro base station
  • a base station 110 that relays communications may be referred to as a relay station, a relay base station, a relay, or the like.
  • the wireless network 100 may be a heterogeneous network that includes base stations 110 of different types, such as macro base stations, pico base stations, femto base stations, relay base stations, or the like. These different types of base stations 110 may have different transmit power levels, different coverage areas, and/or different impacts on interference in the wireless network 100.
  • macro base stations may have a high transmit power level (e.g., 5 to 40 watts) whereas pico base stations, femto base stations, and relay base stations may have lower transmit power levels (e.g., 0.1 to 2 watts) .
  • a network controller 130 may couple to or communicate with a set of base stations 110 and may provide coordination and control for these base stations 110.
  • the network controller 130 may communicate with the base stations 110 via a backhaul communication link.
  • the base stations 110 may communicate with one another directly or indirectly via a wireless or wireline backhaul communication link.
  • the UEs 120 may be dispersed throughout the wireless network 100, and each UE 120 may be stationary or mobile.
  • a UE 120 may include, for example, an access terminal, a terminal, a mobile station, and/or a subscriber unit.
  • a UE 120 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, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet) ) , an entertainment device (e.g., a music device, a video device, and/or a satellite radio)
  • Some UEs 120 may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs.
  • An MTC UE and/or an eMTC UE may include, for example, a robot, a drone, a remote device, a sensor, a meter, a monitor, and/or a location tag, that may communicate with a base station, another device (e.g., a remote device) , or some other entity.
  • Some UEs 120 may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband IoT) devices.
  • Some UEs 120 may be considered a Customer Premises Equipment.
  • a UE 120 may be included inside a housing that houses components of the UE 120, such as processor components and/or memory components.
  • the processor components and the memory components may be coupled together.
  • the processor components e.g., one or more processors
  • the memory components e.g., a memory
  • the processor components and the memory components may be operatively coupled, communicatively coupled, electronically coupled, and/or electrically coupled.
  • any number of wireless networks 100 may be deployed in a given geographic area.
  • Each wireless network 100 may support a particular RAT and may operate on one or more frequencies.
  • a RAT may be referred to as a radio technology, an air interface, or the like.
  • a frequency may be referred to as a carrier, a frequency channel, 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, or a vehicle-to-pedestrian (V2P) protocol) , and/or a mesh network.
  • V2X vehicle-to-everything
  • a UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • Devices of the wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, channels, or the like. For example, devices of the wireless network 100 may communicate using one or more operating bands.
  • devices of the wireless network 100 may communicate using one or more operating bands.
  • two initial operating bands have been identified as frequency range designations FR1 (410 MHz –7.125 GHz) and FR2 (24.25 GHz –52.6 GHz) . It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “Sub-6 GHz” band in various documents and articles.
  • FR2 which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
  • EHF extremely high frequency
  • ITU International Telecommunications Union
  • FR3 7.125 GHz –24.25 GHz
  • FR3 7.125 GHz –24.25 GHz
  • Frequency bands falling within FR3 may inherit FR1 characteristics and/or FR2 characteristics, and thus may effectively extend features of FR1 and/or FR2 into mid-band frequencies.
  • higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz.
  • FR4a or FR4-1 52.6 GHz –71 GHz
  • FR4 52.6 GHz –114.25 GHz
  • FR5 114.25 GHz –300 GHz
  • sub-6 GHz may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies.
  • millimeter wave may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and/or FR5, or may be within the EHF band.
  • frequencies included in these operating bands may be modified, and techniques described herein are applicable to those modified frequency ranges.
  • Deployment of communication systems may be arranged in multiple manners with various components or constituent parts.
  • a network node, a network entity, a mobility element of a network, a RAN node, a core network node, a network element, or a network equipment such as a base station (BS, e.g., base station 110) , or one or more units (or one or more components) performing base station functionality, may be implemented in an aggregated or disaggregated architecture.
  • BS base station
  • base station 110 e.g., base station 110
  • a BS such as a Node B (NB) , eNB, NR BS, 5G NB, access point (AP) , a TRP, a cell, or the like
  • NB Node B
  • eNB evolved Node B
  • NR BS NR BS
  • 5G NB access point
  • TRP TRP
  • cell a cell, or the like
  • an aggregated base station also known as a standalone BS or a monolithic BS
  • disaggregated base station also known as a standalone BS or a monolithic BS
  • An aggregated base station may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node.
  • a disaggregated base station may be configured to utilize a protocol stack that is physically or logically distributed among two or more units (such as one or more central or centralized units (CUs) , one or more distributed units (DUs) , or one or more radio units (RUs) ) .
  • a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed throughout one or multiple other RAN nodes.
  • the DUs may be implemented to communicate with one or more RUs.
  • Each of the CU, DU and RU also can be implemented as virtual units, i.e., a virtual centralized unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) .
  • VCU virtual centralized unit
  • VDU
  • Base station-type operation or network design may consider aggregation characteristics of base station functionality.
  • disaggregated base stations may be utilized in an integrated access backhaul (IAB) network, an O-RAN (such as the network configuration sponsored by the O-RAN Alliance) , or a virtualized radio access network (vRAN) , also known as a cloud radio access network (C-RAN) ) .
  • IAB integrated access backhaul
  • O-RAN such as the network configuration sponsored by the O-RAN Alliance
  • vRAN virtualized radio access network
  • C-RAN cloud radio access network
  • Disaggregation may include distributing functionality across two or more units at various physical locations, as well as distributing functionality for at least one unit virtually, which can enable flexibility in network design.
  • the various units of the disaggregated base station, or disaggregated RAN architecture can be configured for wired or wireless communication with at least one other unit.
  • the term “base station” (e.g., the base station 110) or “network node” may refer to an aggregated base station, a disaggregated base station, an IAB node, a relay node, and/or one or more components thereof.
  • the term “base station” or “network node” may refer to a CU, a DU, an RU, a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) , or a Non-Real Time (Non-RT) RIC, or a combination thereof.
  • the term “base station” or “network node” may refer to one device configured to perform one or more functions, such as those described herein in connection with the base station 110.
  • the term “base station” or “network node” may refer to multiple devices configured to perform the one or more functions. For example, in some distributed systems, each of a number of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to duplicate performance of at least a portion of the function, and the term “base station” or “network node” may refer to any one or more of those different devices.
  • base station or “network node” may refer to one or more virtual base stations and/or one or more virtual base station functions.
  • two or more base station functions may be instantiated on a single device.
  • base station or “network node” may refer to one of the base station functions and not another. In this way, a single device may include more than one base station.
  • the UE 120 may include a communication manager 140.
  • the communication manager 140 may transmit a msgA of a two-step random access channel (RACH) procedure to a network node on a serving cell, wherein the serving cell is associated with a first timing advance group (TAG) and a second TAG; and receive, from the network node on the serving cell, an absolute timing advance (TA) command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to the first TAG or the second TAG.
  • the communication manager 140 may perform one or more other operations described herein.
  • the base station 110 may include a communication manager 150.
  • the communication manager 150 may receive, from a UE 120, a msgA of a two-step RACH procedure on a serving cell; and transmit, to the UE 120 on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to a first TAG associated with the serving cell or a second TAG associated with the serving cell.
  • the communication manager 150 may perform one or more other operations described herein.
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 is a diagram illustrating an example 200 of a base station 110 in communication with a UE 120 in a wireless network 100, in accordance with the present disclosure.
  • the base station 110 may be equipped with a set of antennas 234a through 234t, such as T antennas (T ⁇ 1) .
  • the UE 120 may be equipped with a set of antennas 252a through 252r, such as R antennas (R ⁇ 1) .
  • a transmit processor 220 may receive data, from a data source 212, intended for the UE 120 (or a set of UEs 120) .
  • the transmit processor 220 may select one or more modulation and coding schemes (MCSs) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from that UE 120.
  • MCSs modulation and coding schemes
  • CQIs channel quality indicators
  • the base station 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS (s) selected for the UE 120 and may provide data symbols for the UE 120.
  • the transmit processor 220 may process system information (e.g., for semi-static resource partitioning information (SRPI) ) and control information (e.g., CQI requests, grants, and/or upper layer signaling) and provide overhead symbols and control symbols.
  • the transmit processor 220 may generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS) ) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS) ) .
  • reference signals e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)
  • synchronization signals e.g., a primary synchronization signal (PSS) or a 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 a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems) , shown as modems 232a through 232t.
  • each output symbol stream may be provided to a modulator component (shown as MOD) of a modem 232.
  • Each modem 232 may use a respective modulator component to process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream.
  • Each modem 232 may further use a respective modulator component to process (e.g., convert to analog, amplify, filter, and/or upconvert) the output sample stream to obtain a downlink signal.
  • the modems 232a through 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) , shown as antennas 234a through 234t.
  • a set of antennas 252 may receive the downlink signals from the base station 110 and/or other base stations 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) , shown as modems 254a through 254r.
  • R received signals e.g., R received signals
  • each received signal may be provided to a demodulator component (shown as DEMOD) of a modem 254.
  • DEMOD demodulator component
  • Each modem 254 may use a respective demodulator component to condition (e.g., filter, amplify, downconvert, and/or digitize) a received signal to obtain input samples.
  • Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from the modems 254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to a data sink 260, and may provide decoded control information and system information to a controller/processor 280.
  • controller/processor may refer to one or more controllers, one or more processors, or a combination thereof.
  • a channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and/or a CQI parameter, among other examples.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSSRQ reference signal received quality
  • CQI CQI parameter
  • the network controller 130 may include a communication unit 294, a controller/processor 290, and a memory 292.
  • the network controller 130 may include, for example, one or more devices in a core network.
  • the network controller 130 may communicate with the base station 110 via the communication unit 294.
  • One or more antennas may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and/or one or more antenna arrays, among other examples.
  • An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include one or more antenna elements (within a single housing or multiple housings) , a set of coplanar antenna elements, a set of non-coplanar antenna elements, and/or one or more antenna elements coupled to one or more transmission and/or reception components, such as one or more components of Fig. 2.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports that include RSRP, RSSI, RSRQ, and/or CQI) from the controller/processor 280.
  • the transmit processor 264 may generate reference symbols for one or more reference signals.
  • the symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modems 254 (e.g., for DFT-s-OFDM or CP-OFDM) , and transmitted to the base station 110.
  • the modem 254 of the UE 120 may include a modulator and a demodulator.
  • the UE 120 includes a transceiver.
  • the transceiver may include any combination of the antenna (s) 252, the modem (s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, and/or the TX MIMO processor 266.
  • the transceiver may be used by a processor (e.g., the controller/processor 280) and the memory 282 to perform aspects of any of the methods described herein (e.g., with reference to Figs. 6A-6B and Figs. 7-10) .
  • the uplink signals from UE 120 and/or other UEs may be received by the antennas 234, processed by the modem 232 (e.g., a demodulator component, shown as DEMOD, of the modem 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 the UE 120.
  • the receive processor 238 may provide the decoded data to a data sink 239 and provide the decoded control information to the controller/processor 240.
  • the base station 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244.
  • the base station 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink and/or uplink communications.
  • the modem 232 of the base station 110 may include a modulator and a demodulator.
  • the base station 110 includes a transceiver.
  • the transceiver may include any combination of the antenna (s) 234, the modem (s) 232, the MIMO detector 236, the receive processor 238, the transmit processor 220, and/or the TX MIMO processor 230.
  • the transceiver may be used by a processor (e.g., the controller/processor 240) and the memory 242 to perform aspects of any of the methods described herein (e.g., with reference to Figs. 6A-6B and Figs. 7-10) .
  • the controller/processor 240 of the base station 110, the controller/processor 280 of the UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with an enhanced absolute timing advance (TA) command for uplink multiple transmission reception point (mTRP) operation, as described in more detail elsewhere herein.
  • the network node described herein is the base station 110, is included in the base station 110, or includes one or more components of the base station 110 shown in Fig. 2.
  • the controller/processor 240 of the base station 110, the controller/processor 280 of the 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.
  • the memory 242 and the memory 282 may store data and program codes for the base station 110 and the UE 120, respectively.
  • the memory 242 and/or the memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and/or program code) for wireless communication.
  • the one or more instructions when executed (e.g., directly, or after compiling, converting, and/or interpreting) by one or more processors of the base station 110 and/or the UE 120, may cause the one or more processors, the UE 120, and/or the base station 110 to perform or direct operations of, for example, process 700 of Fig. 7, process 800 of Fig. 8, and/or other processes as described herein.
  • executing instructions may include running the instructions, converting the instructions, compiling the instructions, and/or interpreting the instructions, among other examples.
  • the UE 120 includes means for transmitting a msgA of a two-step random access channel (RACH) procedure to a network node on a serving cell, wherein the serving cell is associated with a first timing advance group (TAG) and a second TAG; and/or means for receiving, from the network node on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to the first TAG or the second TAG.
  • RACH random access channel
  • the means for the UE to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller/processor 280, or memory 282.
  • a network node (e.g., base station 110) includes means for receiving, from a UE 120, a msgA of a two-step RACH procedure on a serving cell; and/or means for transmitting, to the UE 120 on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to a first TAG associated with the serving cell or a second TAG associated with the serving cell.
  • the means for the network node to perform operations described herein may include, for example, one or more of communication manager 150, transmit processor 220, TX MIMO processor 230, modem 232, antenna 234, MIMO detector 236, receive processor 238, controller/processor 240, memory 242, or scheduler 246.
  • While blocks in Fig. 2 are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components.
  • the functions described with respect to the transmit processor 264, the receive processor 258, and/or the TX MIMO processor 266 may be performed by or under the control of the controller/processor 280.
  • 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 300 disaggregated base station architecture, in accordance with the present disclosure.
  • the disaggregated base station architecture shown in Fig. 3 may include one or more CUs 310 that can communicate directly with a core network 320 via a backhaul link, or indirectly with the core network 320 through one or more disaggregated base station units (such as a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) 325 via an E2 link, or a Non-Real Time (Non-RT) RIC 315 associated with a Service Management and Orchestration (SMO) Framework 305, or both) .
  • a CU 310 may communicate with one or more DUs 330 via respective midhaul links, such as an F1 interface.
  • the DUs 330 may communicate with one or more RUs 340 via respective fronthaul links.
  • the RUs 340 may communicate with respective UEs 120 via one or more radio frequency (RF) access links.
  • RF radio frequency
  • Each of the units may include one or more interfaces or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium.
  • Each of the units, or an associated processor or controller providing instructions to the communication interfaces of the units can be configured to communicate with one or more of the other units via the transmission medium.
  • the units can include a wired interface configured to receive or transmit signals over a wired transmission medium to one or more of the other units.
  • the units can include a wireless interface, which may include a receiver, a transmitter or transceiver (such as an RF transceiver) , configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.
  • a wireless interface which may include a receiver, a transmitter or transceiver (such as an RF transceiver) , configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.
  • the CU 310 may host one or more higher layer control functions.
  • control functions can include radio resource control (RRC) , packet data convergence protocol (PDCP) , service data adaptation protocol (SDAP) , or the like.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • SDAP service data adaptation protocol
  • Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 310.
  • the CU 310 may be configured to handle user plane functionality (e.g., Central Unit –User Plane (CU-UP) ) , control plane functionality (e.g., Central Unit –Control Plane (CU-CP) ) , or a combination thereof.
  • the CU 310 can be logically split into one or more CU-UP units and one or more CU-CP units.
  • the CU-UP unit can communicate bidirectionally with the CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration.
  • the CU 310 can be implemented to communicate with the DU 330, as necessary, for network control and signaling.
  • the DU 330 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 340.
  • the DU 330 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, or the like) depending, at least in part, on a functional split, such as those defined by the 3rd Generation Partnership Project (3GPP) .
  • the DU 330 may further host one or more low-PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 330, or with the control functions hosted by the CU 310.
  • Lower-layer functionality can be implemented by one or more RUs 340.
  • an RU 340 controlled by a DU 330, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (such as performing fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like) , or both, based at least in part on the functional split, such as a lower layer functional split.
  • the RU (s) 340 can be implemented to handle over the air (OTA) communication with one or more UEs 120.
  • OTA over the air
  • real-time and non-real-time aspects of control and user plane communication with the RU (s) 340 can be controlled by the corresponding DU 330.
  • this configuration can enable the DU (s) 330 and the CU 310 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
  • the SMO Framework 305 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements.
  • the SMO Framework 305 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements which may be managed via an operations and maintenance interface (such as an O1 interface) .
  • the SMO Framework 305 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 390) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface) .
  • a cloud computing platform such as an open cloud (O-Cloud) 390
  • network element life cycle management such as to instantiate virtualized network elements
  • a cloud computing platform interface such as an O2 interface
  • Such virtualized network elements can include, but are not limited to, CUs 310, DUs 330, RUs 340 and Near-RT RICs 325.
  • the SMO Framework 305 can communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB) 311, via an O1 interface. Additionally, in some implementations, the SMO Framework 305 can communicate directly with one or more RUs 340 via an O1 interface.
  • the SMO Framework 305 also may include a Non-RT RIC 315 configured to support functionality of the SMO Framework 305.
  • the Non-RT RIC 315 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, Artificial Intelligence/Machine Learning (AI/ML) workflows including model training and updates, or policy-based guidance of applications/features in the Near-RT RIC 325.
  • the Non-RT RIC 315 may be coupled to or communicate with (such as via an A1 interface) the Near-RT RIC 325.
  • the Near-RT RIC 325 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 310, one or more DUs 330, or both, as well as an O-eNB, with the Near-RT RIC 325.
  • the Non-RT RIC 315 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 325 and may be received at the SMO Framework 305 or the Non-RT RIC 315 from non-network data sources or from network functions. In some examples, the Non-RT RIC 315 or the Near-RT RIC 325 may be configured to tune RAN behavior or performance. For example, the Non-RT RIC 315 may monitor long-term trends and patterns for performance and employ AI/ML models to perform corrective actions through the SMO Framework 305 (such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies) .
  • SMO Framework 305 such as reconfiguration via O1
  • A1 policies such as A1 policies
  • 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 TRP differentiation at a UE 120 based at least in part on a control resource set (CORESET) pool index, in accordance with the present disclosure.
  • CORESET pool index or CORESETPoolIndex
  • PDCH physical downlink control channel
  • the UE 120 may be configured to differentiate among multiple TRPs 405 based at least in part on a CORESET pool index in uplink multiple downlink control information (mDCI) multi-TRP (mTRP) operation, where multiple TRPs 405 may be configured to transmit, to the UE 120, uplink DCI that carries an uplink grant (e.g., for a physical uplink shared channel (PUSCH) ) .
  • mDCI uplink multiple downlink control information
  • mTRP multi-TRP
  • a CORESET may refer to a control region that is structured to support an efficient use of resources, such as by flexible configuration or reconfiguration of resources for one or more PDCCHs associated with a UE 120.
  • a CORESET may occupy the first symbol of an orthogonal frequency division multiplexing (OFDM) slot, the first two symbols of an OFDM slot, or the first three symbols of an OFDM slot.
  • OFDM orthogonal frequency division multiplexing
  • a CORESET may include multiple resource blocks (RBs) in the frequency domain, and either one, two, or three symbols in the time domain.
  • a quantity of resources included in a CORESET may be flexibly configured, such as by using radio resource control (RRC) signaling to indicate a frequency domain region (for example, a quantity of resource blocks) or a time domain region (for example, a quantity of symbols) for the CORESET.
  • RRC radio resource control
  • a UE 120 may be configured with multiple CORESETs in a given bandwidth part (BWP) of a serving cell.
  • Each CORESET configured for the UE 120 may be associated with a CORESET identifier (CORESET ID) .
  • CORESET ID CORESET identifier
  • a first CORESET configured for the UE 120 may be associated with CORESET ID 1
  • a second CORESET configured for the UE 120 may be associated with CORESET ID 2
  • a third CORESET configured for the UE 120 may be associated with CORESET ID 3
  • a fourth CORESET configured for the UE 120 may be associated with CORESET ID 4.
  • each CORESET pool may be associated with a CORESET pool index.
  • CORESET ID 1 and CORESET ID 2 may be grouped into CORESET pool index 0, and CORESET ID 3 and CORESET ID 4 may be grouped into CORESET pool index 1.
  • each CORESET pool index value may be associated with a particular TRP 405.
  • a first TRP 405 (TRP 1 ) may be associated with CORESET pool index 0 and a second TRP 405 (TRP 2 ) may be associated with CORESET pool index 1.
  • the UE 120 may be configured by a higher layer parameter, such as PDCCH-Config, with information identifying an association between a TRP 405 and a CORESET pool index value assigned to the TRP 405.
  • the UE 120 may identify the TRP 405 that transmitted a downlink control information (DCI) message carrying an uplink grant by determining the CORESET ID of the CORESET in which the PDCCH carrying the DCI uplink grant was transmitted, determining the CORESET pool index value associated with the CORESET pool in which the CORESET ID is included, and identifying the TRP 405 associated with the CORESET pool index value.
  • the UE 120 may then transmit a PUSCH to the identified TRP 405 associated with the CORESET pool index value using scheduling parameters (e.g., time and frequency resources, an MCS, and/or other parameters) indicated in the uplink grant.
  • scheduling parameters e.g., time and frequency resources, an MCS, and/or other parameters
  • the different TRPs 405 that communicate with the UE 120 in mDCI mTRP operation may be associated with different time delays (e.g., based on the TRPs 405 having different geographical locations) . Accordingly, as shown by reference number 420, different TRPs 405 may be associated with different TA values in mDCI mTRP operation. For example, in Fig. 4, the first TRP is associated with a first TA (TA 1 ) and the second TRP is associated with a second TA (TA 2 ) .
  • the UE 120 may apply the TA associated with the identified TRP 405.
  • Fig. 4 is provided as an example. Other examples may differ from what is described with regard to Fig. 4.
  • Fig. 5 is a diagram illustrating an example 500 of a two-step random access procedure, in accordance with the present disclosure.
  • a base station 110 and a UE 120 may communicate with one another to perform the two-step random access procedure, which may also referred to as a two-step random access channel (RACH) procedure.
  • RACH random access channel
  • the base station 110 may transmit, and the UE 120 may receive, one or more synchronization signal blocks (SSBs) and random access configuration information.
  • the random access configuration information may be transmitted in and/or indicated by system information (e.g., in one or more system information blocks (SIBs) ) and/or an SSB, such as for contention-based random access.
  • the random access configuration information may be transmitted in an RRC message and/or a PDCCH order message that triggers a RACH procedure, such as for contention-free random access.
  • the random access configuration information may include one or more parameters to be used in the two-step random access procedure, such as one or more parameters for transmitting a random access message (RAM) and/or receiving a random access response (RAR) to the RAM.
  • RAM random access message
  • RAR random access response
  • the UE 120 may transmit, and the base station 110 may receive, a RAM preamble on a physical random access channel (PRACH) .
  • PRACH physical random access channel
  • the UE 120 may transmit, and the base station 110 may receive, a RAM payload on a PUSCH.
  • the UE 120 may transmit the RAM preamble and the RAM payload to the base station 110 as part of an initial (or first) step of the two-step random access procedure.
  • the RAM may be referred to as message A, msgA, a first message, or an initial message in a two-step random access procedure.
  • the RAM preamble may be referred to as a message A preamble, a msgA preamble, a preamble, or a PRACH preamble
  • the RAM payload may be referred to as a message A payload, a msgA payload, or a payload.
  • the RAM may include some or all of the contents of message 1 (msg1) and message 3 (msg3) of a four-step random access procedure.
  • the RAM preamble may include some or all contents of message 1 (e.g., a PRACH preamble)
  • the RAM payload may include some or all contents of message 3 (e.g., a UE identifier, such as a cell radio network temporary identifier (C-RNTI) , uplink control information (UCI) , and/or a PUSCH transmission) .
  • a UE identifier such as a cell radio network temporary identifier (C-RNTI)
  • UCI uplink control information
  • PUSCH transmission e.g., a UE identifier, such as a cell radio network temporary identifier (C-RNTI) , uplink control information (UCI) , and/or a PUSCH transmission
  • the base station 110 may receive the RAM preamble transmitted by the UE 120. If the base station 110 successfully receives and decodes the RAM preamble, the base station 110 may then receive and decode the RAM payload.
  • the base station 110 may transmit an RAR (sometimes referred to as an RAR message) .
  • the base station 110 may transmit the RAR message as part of a second step of the two-step random access procedure.
  • the RAR message may be referred to as message B, msgB, or a second message in a two-step random access procedure.
  • the RAR message may include some or all of the contents of message 2 (msg2) and message 4 (msg4) of a four-step random access procedure.
  • the RAR message may include the detected PRACH preamble identifier, the detected UE identifier, a TA value, and/or contention resolution information.
  • the base station 110 may transmit a PDCCH communication for the RAR.
  • the PDCCH communication may schedule a PDSCH communication that includes the RAR.
  • the PDCCH communication may indicate a resource allocation (e.g., in DCI) for the PDSCH communication.
  • the base station 110 may transmit the PDSCH communication for the RAR, as scheduled by the PDCCH communication.
  • the RAR may be included in a medium access control (MAC) protocol data unit (PDU) of the PDSCH communication.
  • MAC medium access control
  • PDU protocol data unit
  • the UE 120 may transmit a hybrid automatic repeat request (HARQ) acknowledgement (ACK) .
  • HARQ hybrid automatic repeat request
  • various events may trigger the two-step random access procedure (e.g., causing the UE 120 to transmit the msgA preamble on the PRACH and the msgA payload on the PUSCH) .
  • the two-step random access procedure may be triggered to enable initial access to the wireless network when the UE 120 is in an RRC idle state, to reestablish an RRC connection, to transmit uplink data in an RRC connected state when there are no available physical uplink control channel (PUCCH) resources for transmitting a scheduling request, and/or to perform beam failure recovery, among other examples.
  • PUCCH physical uplink control channel
  • the two-step random access procedure may be triggered when the UE 120 is in an RRC connected mode and an uplink synchronization status of the UE 120 is non-synchronized and/or to establish a time alignment for a secondary timing advance group (TAG) .
  • TAG may generally include one or more serving cells that have the same uplink TA value, where a TAG that contains a primary cell (Pcell) or a primary secondary cell (PScell) may be referred to as a primary TAG and a TAG that contains only secondary cells (Scells) may be referred to as a secondary TAG.
  • the UE 120 may transmit the msgA preamble on the PRACH and the msgA payload on the PUSCH within a Pcell or a PScell. After transmitting the msgA preamble and the msgA payload, the UE 120 then monitors a PDCCH for a response (e.g., an RAR message) from the base station 110 within a configured window, sometimes referred to as an RAR window.
  • a response e.g., an RAR message
  • the UE 120 may transmit the msgA preamble and the msgA payload using a dedicated preamble and a dedicated PUSCH resource configured for the UE 120, and the two-step random access procedure may end when the UE 120 receives the RAR message within the RAR window.
  • the UE 120 may need to initiate contention-based random access, because an absolute TA command to synchronize uplink timing is carried in a contention resolution message (e.g., the msgB PDSCH) .
  • the UE 120 may be assigned a C-RNTI that is dedicated to the UE 120, which may be indicated to the base station 110 in a C-RNTI MAC control element (MAC-CE) included in the msgA transmission.
  • the UE 120 may then monitor the PDCCH for an RAR message that is identified by the C-RNTI dedicated to the UE 120.
  • MAC-CE C-RNTI MAC control element
  • the MAC PDU of the msgB PDSCH communication may contain an absolute TA command within a MAC-CE.
  • the UE 120 may then process the absolute TA command carried in the MAC-CE to synchronize uplink timing.
  • reference number 545 depicts an example structure for the MAC-CE that carries the absolute TA command.
  • the MAC-CE that carries the absolute TA command (sometimes referred to as an absolute timing advance command MAC-CE) generally has a fixed size of two (2) octets.
  • the MAC-CE includes a TA command field that indicates an index associated with a TA value used to control the amount of timing adjustment that the UE 120 applies on the uplink.
  • the MAC-CE carrying the absolute TA command has a size of twelve (12) bits, which includes the last four (4) bits in the first octet and all eight (8) bits in the second octet.
  • the first octet in the MAC-CE includes four (4) reserved bits (shown as “R” ) that are set to zero (0) .
  • the UE 120 may apply the TA command for a primary TAG that contains a Pcell and/or a PScell.
  • a serving cell is configured to support mDCI mTRP operation (e.g., as shown in Fig. 4)
  • one serving cell may be configured with two TAGs that correspond to different TRPs that may be associated with different TAs based on the different TRPs being associated with different time delays.
  • a Pcell or PScell is configured with two TAGs to enable uplink mDCI mTRP operation, there may be ambiguity as to whether the TA command carried in the contention resolution message is applicable to the first TAG or the second TAG. Accordingly, some aspects described herein relate to techniques to indicate a TAG associated with a TA command in cases where a Pcell or PScell is associated with two TAGs. Further details are provided below with reference to Figs. 5A-5B.
  • Fig. 5 is provided as an example. Other examples may differ from what is described with regard to Fig. 5.
  • Figs. 6A-6B are diagrams illustrating examples 600 associated with an enhanced absolute TA command for uplink mTRP operation, in accordance with the present disclosure.
  • examples 600 include communication between a base station and a UE in a wireless network (e.g., wireless network 100) .
  • the base station and the UE may communicate via a wireless access link, which may include an uplink and a downlink.
  • the base station and the UE may communicate on the uplink according to an mDCI mTRP configuration, where a Pcell or PScell includes a first TRP (shown as TRP 1 ) and a second TRP (shown as TRP 2 ) such that the UE may transmit on the uplink to either the first TRP or the second TRP included in the Pcell or PScell.
  • mDCI mTRP operation may be configured per component carrier or per bandwidth part.
  • the first TRP may be associated with a first TA and the second TRP may be associated with a second TA.
  • the base station configures mDCI mTRP operation in a special cell (Spcell) , which generally refers to a Pcell or a PScell
  • the Spcell may be associated with a first TAG based on the first TA associated with the first TRP and a second TAG based on the second TA associated with the second TRP.
  • the UE may transmit a msgA communication to the base station to initiate a two-step RACH procedure.
  • the UE may transmit the msgA communication in the Pcell or PScell in which mDCI mTRP operation is configured to initiate a two-step contention-based RACH procedure in which a contention resolution message includes an absolute TA command.
  • the base station may assign a C-RNTI to the UE, which may be used to provide the UE with uplink grants, downlink assignments, and/or other scheduling in an RRC connected mode.
  • the UE may transmit a msgA preamble on a PRACH and a msgA payload on a PUSCH, where the msgA payload may include the C-RNTI assigned to the UE.
  • the UE may receive a msgB communication from the base station in reply to the msgA communication. For example, after the UE transmits the msgA preamble and the msgA payload that includes the C-RNTI assigned to the UE (e.g., within a C-RNTI MAC-CE) , the UE may monitor the PDCCH of the Pcell or PScell for an RAR message (or contention resolution message) that is identified by (e.g., scrambled by) the C-RNTI assigned to the UE.
  • RAR message contention resolution message
  • the msgB communication may include a PDCCH that is scrambled by the C-RNTI assigned to the UE, and the PDCCH may schedule a PDSCH that includes the contention resolution message.
  • the contention resolution message may include a MAC PDU that contains an absolute TA command MAC-CE.
  • the absolute TA command MAC-CE contains only one (1) TA command, but the Pcell or PScell includes two (2) TAGs that respectively correspond to the first TRP and the second TRP, the absolute TA command MAC-CE may be associated with information to indicate whether the TA command carried in the absolute TA command MAC-CE is applicable to the first TAG that includes the first TRP or the second TAG that includes the second TRP.
  • the absolute TA command MAC-CE may include a one-bit indicator to indicate whether the TA command applies to the first TAG or the second TAG.
  • the absolute TA command MAC-CE includes a TA command field with twelve (12) bits to indicate an index to a TA value used to control a timing adjustment that the UE 120 is to apply on the uplink.
  • one reserved bit in the absolute TA command MAC-CE is used to indicate whether the UE is to apply the TA value indicated in the TA command field for the first TAG or the second TAG.
  • the one-bit indicator may indicate a TRP identifier associated with the TA command or the one-bit indicator may indicate a CORESET pool index identifier associated with the TA command (e.g., where the CORESET pool index identifier corresponds to a TRP, as described above with reference to Fig. 4) .
  • a first TRP identifier and/or CORESET pool index identifier may be associated with the first TAG associated with the first TRP
  • a second TRP identifier and/or CORESET pool index identifier may be associated with the second TAG associated with the second TRP.
  • the TA command carried in the absolute TA command MAC-CE may apply to the first TAG associated with the first TRP identifier and/or first CORESET pool index identifier if the one-bit indicator is set to a first value (e.g., zero (0) ) . Otherwise, the TA command carried in the absolute TA command MAC-CE may apply to the second TAG associated with the second TRP identifier and/or the second CORESET pool index identifier in cases where the one-bit indicator is set to a second value (e.g., one (1) ) .
  • a second value e.g., one (1)
  • the TA command carried in the absolute TA command MAC-CE may have an implicit association with either the first TAG that is associated with the first TRP or the second TAG that is associated with the second TRP.
  • the UE may transmit the msgA preamble using a beam that corresponds to a selected SSB index (e.g., an index for an SSB that has a highest RSRP or otherwise satisfies one or more beam selection criteria) .
  • the UE may transmit the msgA preamble in a PRACH occasion that includes configured time and frequency resources in which the UE is permitted to transmit the msgA preamble.
  • a set of SSB indexes and/or PRACH occasions may be allocated among the first TRP and the second TRP. Accordingly, as shown in Fig. 6B, and by reference number 660, whether the absolute TA command carried in the absolute TA command MAC-CE is applicable to the first TAG or the second TAG may be based at least in part on the SSB index and/or PRACH occasion used by the UE for the msgA transmission.
  • the first half of the SSB indexes and/or PRACH occasions that are available for the msgA preamble transmission may correspond to the first TAG of the Pcell or PScell
  • the second half of the SSB indexes and/or PRACH occasions that are available for the msgA preamble transmission may correspond to the second TAG of the Pcell or PScell.
  • the absolute TA command may be applicable to the first TAG associated with the first TRP.
  • the absolute TA command may be applicable to the second TAG associated with the second TRP.
  • a first set of SSB indexes and/or PRACH occasions may be associated with a serving cell physical cell identity (PCI) corresponding to the first TAG
  • a second set of SSB indexes and/or PRACH occasions may be associated with a non-serving cell PCI corresponding to the second TAG.
  • PCI serving cell physical cell identity
  • the absolute TA command may be applicable to the first TAG associated with the first TRP. Otherwise, if the UE uses an SSB index or PRACH occasion in the second set of SSB indexes or PRACH occasions associated with the non-serving cell PCI, the absolute TA command may be applicable to the second TAG associated with the second TRP.
  • Figs. 6A-6B are provided as examples. Other examples may differ from what is described with regard to Figs. 6A-6B.
  • Fig. 7 is a diagram illustrating an example process 700 performed, for example, by a UE, in accordance with the present disclosure.
  • Example process 700 is an example where the UE (e.g., UE 120) performs operations associated with enhanced absolute TA command for uplink mDCI mTRP operation.
  • the UE e.g., UE 120
  • process 700 may include transmitting a msgA of a two-step RACH procedure to a network node on a serving cell, wherein the serving cell is associated with a first TAG and a second TAG (block 710) .
  • the UE e.g., using communication manager 140 and/or transmission component 904, depicted in Fig. 9 may transmit a msgA of a two-step RACH procedure to a network node on a serving cell, wherein the serving cell is associated with a first TAG and a second TAG, as described above.
  • process 700 may include receiving, from the network node on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to the first TAG or the second TAG (block 720) .
  • the UE e.g., using communication manager 140 and/or reception component 902, depicted in Fig. 9 may receive, from the network node on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to the first TAG or the second TAG, as described above.
  • 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 absolute TA command is received in a MAC-CE that has a one-bit field to indicate whether the absolute TA command applies to the first TAG or the second TAG.
  • a value of the one-bit field indicates a CORESET pool index identifier associated with the first TAG or the second TAG.
  • a value of the one-bit field indicates a TRP identifier associated with the first TAG or the second TAG.
  • the information that indicates whether the absolute TA command applies to the first TAG or the second TAG includes an SSB index associated with a RACH occasion used to transmit a random access preamble in the msgA.
  • the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the SSB index associated with the RACH occasion used to transmit the random access preamble in the msgA is included in a first set of SSB indexes associated with the first TAG or a second set of SSB indexes associated with the second TAG.
  • the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the SSB index associated with the RACH occasion used to transmit the random access preamble in the msgA is associated with a serving cell PCI or a non-serving cell PCI.
  • the information that indicates whether the absolute TA command applies to the first TAG or the second TAG includes a PRACH occasion used to transmit a random access preamble in the msgA.
  • the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the PRACH occasion used to transmit the random access preamble in the msgA is included in a first set of PRACH occasions associated with the first TAG or a second set of PRACH occasions associated with the second TAG.
  • the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the PRACH occasion used to transmit the random access preamble in the msgA is associated with a serving cell PCI or a non-serving cell PCI.
  • 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 network node, in accordance with the present disclosure.
  • Example process 800 is an example where the network node (e.g., base station 110 or a component that performs functionality of base station 110, such as a CU, DU, or RU) performs operations associated with enhanced absolute TA command for uplink mTRP operation.
  • the network node e.g., base station 110 or a component that performs functionality of base station 110, such as a CU, DU, or RU
  • process 800 may include receiving, from a UE, a msgA of a two-step RACH procedure on a serving cell (block 810) .
  • the network node e.g., using communication manager 150 and/or reception component 1002, depicted in Fig. 10) may receive, from a UE, a msgA of a two-step RACH procedure on a serving cell, as described above.
  • process 800 may include transmitting, to the UE on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to a first TAG associated with the serving cell or a second TAG associated with the serving cell (block 820) .
  • the network node e.g., using communication manager 150 and/or transmission component 1004, depicted in Fig.
  • the absolute TA command may transmit, to the UE on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to a first TAG associated with the serving cell or a second TAG associated with the serving cell, as described above.
  • 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.
  • the absolute TA command is transmitted in a MAC-CE that has a one-bit field to indicate whether the absolute TA command applies to the first TAG or the second TAG.
  • a value of the one-bit field indicates a CORESET pool index identifier associated with the first TAG or the second TAG.
  • a value of the one-bit field indicates a TRP identifier associated with the first TAG or the second TAG.
  • the information that indicates whether the absolute TA command applies to the first TAG or the second TAG includes an SSB index associated with a RACH occasion used by the UE to transmit a random access preamble in the msgA.
  • the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the SSB index associated with the RACH occasion used to transmit the random access preamble in the msgA is included in a first set of SSB indexes associated with the first TAG or a second set of SSB indexes associated with the second TAG.
  • the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the SSB index associated with the RACH occasion used to transmit the random access preamble in the msgA is associated with a serving cell PCI or a non-serving cell PCI.
  • the information that indicates whether the absolute TA command applies to the first TAG or the second TAG includes a PRACH occasion used by the UE to transmit a random access preamble in the msgA.
  • the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the PRACH occasion used to transmit the random access preamble in the msgA is included in a first set of PRACH occasions associated with the first TAG or a second set of PRACH occasions associated with the second TAG.
  • the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the PRACH occasion used to transmit the random access preamble in the msgA is associated with a serving cell PCI or a non-serving cell PCI.
  • 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.
  • Fig. 9 is a diagram of an example apparatus 900 for wireless communication.
  • the apparatus 900 may be a UE, or a UE may include the apparatus 900.
  • the apparatus 900 includes a reception component 902 and a transmission component 904, which may be in communication with one another (for example, via one or more buses and/or one or more other components) .
  • the apparatus 900 may communicate with another apparatus 906 (such as a UE, a base station, or another wireless communication device) using the reception component 902 and the transmission component 904.
  • the apparatus 900 may include the communication manager 140.
  • the apparatus 900 may be configured to perform one or more operations described herein in connection with Figs. 6A-6B. Additionally, or alternatively, the apparatus 900 may be configured to perform one or more processes described herein, such as process 700 of Fig. 7.
  • the apparatus 900 and/or one or more components shown in Fig. 9 may include one or more components of the UE described in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 9 may be implemented within one or more components described in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.
  • the reception component 902 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 906.
  • the reception component 902 may provide received communications to one or more other components of the apparatus 900.
  • the reception component 902 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 900.
  • the reception component 902 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection with Fig. 2.
  • the transmission component 904 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 906.
  • one or more other components of the apparatus 900 may generate communications and may provide the generated communications to the transmission component 904 for transmission to the apparatus 906.
  • the transmission component 904 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 906.
  • the transmission component 904 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection with Fig. 2. In some aspects, the transmission component 904 may be co-located with the reception component 902 in a transceiver.
  • the transmission component 904 may transmit a msgA of a two-step RACH procedure to a network node on a serving cell, wherein the serving cell is associated with a first TAG and a second TAG.
  • the reception component 902 may receive, from the network node on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to the first TAG or the second TAG.
  • Fig. 9 The number and arrangement of components shown in Fig. 9 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 9. Furthermore, two or more components shown in Fig. 9 may be implemented within a single component, or a single component shown in Fig. 9 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 9 may perform one or more functions described as being performed by another set of components shown in Fig. 9.
  • Fig. 10 is a diagram of an example apparatus 1000 for wireless communication.
  • the apparatus 1000 may be a base station, or a base station may include the apparatus 1000.
  • the apparatus 1000 includes a reception component 1002 and a transmission component 1004, which may be in communication with one another (for example, via one or more buses and/or one or more other components) .
  • the apparatus 1000 may communicate with another apparatus 1006 (such as a UE, a base station, or another wireless communication device) using the reception component 1002 and the transmission component 1004.
  • the apparatus 1000 may include the communication manager 150.
  • the apparatus 1000 may be configured to perform one or more operations described herein in connection with Figs. 6A-6B. Additionally, or alternatively, the apparatus 1000 may be configured to perform one or more processes described herein, such as process 800 of Fig. 8.
  • the apparatus 1000 and/or one or more components shown in Fig. 10 may include one or more components of the base station described in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 10 may be implemented within one or more components described in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.
  • the reception component 1002 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1006.
  • the reception component 1002 may provide received communications to one or more other components of the apparatus 1000.
  • the reception component 1002 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 1000.
  • the reception component 1002 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the base station described in connection with Fig. 2.
  • the transmission component 1004 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1006.
  • one or more other components of the apparatus 1000 may generate communications and may provide the generated communications to the transmission component 1004 for transmission to the apparatus 1006.
  • the transmission component 1004 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 1006.
  • the transmission component 1004 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the base station described in connection with Fig. 2. In some aspects, the transmission component 1004 may be co-located with the reception component 1002 in a transceiver.
  • the reception component 1002 may receive, from a UE, a msgA of a two-step RACH procedure on a serving cell.
  • the transmission component 1004 may transmit, to the UE on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to a first TAG associated with the serving cell or a second TAG associated with the serving cell.
  • Fig. 10 The number and arrangement of components shown in Fig. 10 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 10. Furthermore, two or more components shown in Fig. 10 may be implemented within a single component, or a single component shown in Fig. 10 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 10 may perform one or more functions described as being performed by another set of components shown in Fig. 10.
  • a method of wireless communication performed by a UE comprising: transmitting a msgA of a two-step RACH procedure to a network node on a serving cell, wherein the serving cell is associated with a first TAG and a second TAG; and receiving, from the network node on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to the first TAG or the second TAG.
  • Aspect 2 The method of Aspect 1, wherein the absolute TA command is received in a MAC-CE that has a one-bit field to indicate whether the absolute TA command applies to the first TAG or the second TAG.
  • Aspect 3 The method of Aspect 2, wherein a value of the one-bit field indicates a CORESET pool index identifier associated with the first TAG or the second TAG.
  • Aspect 4 The method of Aspect 2, wherein a value of the one-bit field indicates a TRP identifier associated with the first TAG or the second TAG.
  • Aspect 5 The method of Aspect 1, wherein the information that indicates whether the absolute TA command applies to the first TAG or the second TAG includes an SSB index associated with a RACH occasion used to transmit a random access preamble in the msgA.
  • Aspect 6 The method of Aspect 5, wherein the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the SSB index associated with the RACH occasion used to transmit the random access preamble in the msgA is included in a first set of SSB indexes associated with the first TAG or a second set of SSB indexes associated with the second TAG.
  • Aspect 7 The method of Aspect 5, wherein the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the SSB index associated with the RACH occasion used to transmit the random access preamble in the msgA is associated with a serving cell PCI or a non-serving cell PCI.
  • Aspect 8 The method of Aspect 1, wherein the information that indicates whether the absolute TA command applies to the first TAG or the second TAG includes a PRACH occasion used to transmit a random access preamble in the msgA.
  • Aspect 9 The method of Aspect 8, wherein the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the PRACH occasion used to transmit the random access preamble in the msgA is included in a first set of PRACH occasions associated with the first TAG or a second set of PRACH occasions associated with the second TAG.
  • Aspect 10 The method of Aspect 8, wherein the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the PRACH occasion used to transmit the random access preamble in the msgA is associated with a serving cell PCI or a non-serving cell PCI.
  • a method of wireless communication performed by a network node comprising: receiving, from a UE, a msgA of a two-step RACH procedure on a serving cell; and transmitting, to the UE on the serving cell, an absolute TA command in a msgB of the two-step RACH procedure, wherein the absolute TA command is associated with information that indicates whether the absolute TA command applies to a first TAG associated with the serving cell or a second TAG associated with the serving cell.
  • Aspect 12 The method of Aspect 11, wherein the absolute TA command is transmitted in a MAC-CE that has a one-bit field to indicate whether the absolute TA command applies to the first TAG or the second TAG.
  • Aspect 13 The method of Aspect 12, wherein a value of the one-bit field indicates a CORESET pool index identifier associated with the first TAG or the second TAG.
  • Aspect 14 The method of Aspect 12, wherein a value of the one-bit field indicates a TRP identifier associated with the first TAG or the second TAG.
  • Aspect 15 The method of Aspect 11, wherein the information that indicates whether the absolute TA command applies to the first TAG or the second TAG includes an SSB index associated with a RACH occasion used by the UE to transmit a random access preamble in the msgA.
  • Aspect 16 The method of Aspect 15, wherein the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the SSB index associated with the RACH occasion used to transmit the random access preamble in the msgA is included in a first set of SSB indexes associated with the first TAG or a second set of SSB indexes associated with the second TAG.
  • Aspect 17 The method of Aspect 15, wherein the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the SSB index associated with the RACH occasion used to transmit the random access preamble in the msgA is associated with a serving cell PCI or a non-serving cell PCI.
  • Aspect 18 The method of Aspect 11, wherein the information that indicates whether the absolute TA command applies to the first TAG or the second TAG includes a PRACH occasion used by the UE to transmit a random access preamble in the msgA.
  • Aspect 19 The method of Aspect 18, wherein the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the PRACH occasion used to transmit the random access preamble in the msgA is included in a first set of PRACH occasions associated with the first TAG or a second set of PRACH occasions associated with the second TAG.
  • Aspect 20 The method of Aspect 18, wherein the absolute TA command applies to the first TAG or the second TAG based at least in part on whether the PRACH occasion used to transmit the random access preamble in the msgA is associated with a serving cell PCI or a non-serving cell PCI.
  • Aspect 21 An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more of Aspects 1-10.
  • Aspect 22 A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors configured to perform the method of one or more of Aspects 1-10.
  • Aspect 23 An apparatus for wireless communication, comprising at least one means for performing the method of one or more of Aspects 1-10.
  • Aspect 24 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of Aspects 1-10.
  • Aspect 25 A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-10.
  • Aspect 26 An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more of Aspects 11-20.
  • Aspect 27 A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors configured to perform the method of one or more of Aspects 11-20.
  • Aspect 28 An apparatus for wireless communication, comprising at least one means for performing the method of one or more of Aspects 11-20.
  • Aspect 29 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of Aspects 11-20.
  • Aspect 30 A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 11-20.
  • the term “component” is intended to be broadly construed as hardware and/or a combination of hardware and software.
  • “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and/or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • a “processor” is implemented in hardware and/or a combination of hardware and software. It will be apparent that systems and/or methods described herein may be implemented in different forms of hardware 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, 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, ” or the like are intended to be open-ended terms that do not limit an element that they modify (e.g., an element “having” A may also have B) .
  • the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.
  • the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or, ” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of” ) .

Landscapes

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

Abstract

Divers aspects de la présente divulgation portent d'une manière générale sur la communication sans fil. Selon certains aspects, un équipement utilisateur (UE) peut transmettre un msgA d'une procédure de canal d'accès aléatoire (RACH) en deux étapes à un nœud de réseau sur une cellule de desserte, la cellule de desserte étant associée à un premier groupe d'avance temporelle (TAG) et à un deuxième TAG. L'UE peut recevoir, en provenance du nœud de réseau sur la cellule de desserte, une commande d'avance temporelle absolue (TA) dans un msgB de la procédure RACH en deux étapes, la commande TA absolue étant associée à des informations qui indiquent si la commande TA absolue s'applique au premier TAG ou au deuxième TAG. De nombreux autres aspects sont décrits.
PCT/CN2022/075797 2022-02-10 2022-02-10 Commande d'avance temporelle absolue améliorée pour opération de point de réception/transmission multiple de liaison montante WO2023150957A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/075797 WO2023150957A1 (fr) 2022-02-10 2022-02-10 Commande d'avance temporelle absolue améliorée pour opération de point de réception/transmission multiple de liaison montante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/075797 WO2023150957A1 (fr) 2022-02-10 2022-02-10 Commande d'avance temporelle absolue améliorée pour opération de point de réception/transmission multiple de liaison montante

Publications (1)

Publication Number Publication Date
WO2023150957A1 true WO2023150957A1 (fr) 2023-08-17

Family

ID=87563429

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/075797 WO2023150957A1 (fr) 2022-02-10 2022-02-10 Commande d'avance temporelle absolue améliorée pour opération de point de réception/transmission multiple de liaison montante

Country Status (1)

Country Link
WO (1) WO2023150957A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102932902A (zh) * 2011-08-08 2013-02-13 中兴通讯股份有限公司 一种多定时组下的定时提前命令传输方法和系统
CN111165032A (zh) * 2017-10-02 2020-05-15 瑞典爱立信有限公司 新无线电中的定时提前范围适配
CN112154707A (zh) * 2018-04-03 2020-12-29 Idac控股公司 用于非陆地网络通信的定时提前
WO2021239199A1 (fr) * 2020-05-25 2021-12-02 Nokia Technologies Oy Appareils d'un réseau de radiocommunication, procédés de fonctionnement d'un appareil d'un réseau de communication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102932902A (zh) * 2011-08-08 2013-02-13 中兴通讯股份有限公司 一种多定时组下的定时提前命令传输方法和系统
CN111165032A (zh) * 2017-10-02 2020-05-15 瑞典爱立信有限公司 新无线电中的定时提前范围适配
CN112154707A (zh) * 2018-04-03 2020-12-29 Idac控股公司 用于非陆地网络通信的定时提前
WO2021239199A1 (fr) * 2020-05-25 2021-12-02 Nokia Technologies Oy Appareils d'un réseau de radiocommunication, procédés de fonctionnement d'un appareil d'un réseau de communication

Similar Documents

Publication Publication Date Title
US20220346150A1 (en) Message repetitions during a random access channel procedure
US20230107490A1 (en) Downlink common signaling in a single frequency network transmission scheme
WO2023150957A1 (fr) Commande d'avance temporelle absolue améliorée pour opération de point de réception/transmission multiple de liaison montante
US20240008073A1 (en) Resources for joint channel estimation of repetitions
US20240155669A1 (en) Uplink transmissions with repetition during contention-free random access
WO2024065638A1 (fr) Application de commandes d'avance temporelle d'un message de canal d'accès à un groupe d'avance temporelle de multiples groupes d'avance temporelle
WO2024040552A1 (fr) États d'indicateur de configuration de transmission unifié pour procédures d'accès aléatoire
WO2023159384A1 (fr) Multiples transmissions de canaux d'accès aléatoire physique à l'aide d'un saut de fréquence
WO2023155058A1 (fr) Indications de cellule et de groupe d'avance de temps pour procédures d'accès aléatoire
WO2024065622A1 (fr) Détermination de transmission de canal d'accès aléatoire physique initial pour de multiples transmissions de canal d'accès aléatoire physique
US20240008088A1 (en) Combined random access response and remaining minimum system information
WO2023141931A1 (fr) Application d'avance temporelle avec de multiples points de transmission et réception
US12028141B2 (en) Initial access enhancements for network deployments
US20240224343A1 (en) Random access channel transmission repetition in full-duplex communications
WO2024092488A1 (fr) Sélections pour des communications de canal d'accès aléatoire physique
US20240080698A1 (en) Joint cell activation and timing advance command
US20230422306A1 (en) Random access channel occasions associated with a relay
WO2024040550A1 (fr) Indications d'état d'indicateur de configuration de transmission unifié dans des informations de commande sur liaison descendante
WO2024011445A1 (fr) Signalisation d'avance temporelle pour de multiples points de réception d'émission
WO2023220852A1 (fr) Procédures d'accès aléatoire basées sur la probabilité
WO2023159552A1 (fr) Activation d'état d'indicateur de configuration de transmission unifiée
WO2023220910A1 (fr) Procédure rach en quatre étapes pour un équipement utilisateur de collecte d'énergie
WO2024000216A1 (fr) Activation de ressource de planification semi-persistante déclenchée par radiomessagerie pour une transmission de petites données terminée au mobile
WO2022233292A1 (fr) Réinitialisation d'un faisceau sur la base au moins en partie d'un espacement de sous-porteuses
US20240088971A1 (en) Initial access enhancements for network deployments

Legal Events

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

Ref document number: 22925319

Country of ref document: EP

Kind code of ref document: A1