WO2024054717A1 - Instruction conjointe d'activation de cellule et d'avance temporelle - Google Patents

Instruction conjointe d'activation de cellule et d'avance temporelle Download PDF

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Publication number
WO2024054717A1
WO2024054717A1 PCT/US2023/070325 US2023070325W WO2024054717A1 WO 2024054717 A1 WO2024054717 A1 WO 2024054717A1 US 2023070325 W US2023070325 W US 2023070325W WO 2024054717 A1 WO2024054717 A1 WO 2024054717A1
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WIPO (PCT)
Prior art keywords
timing advance
cell
advance command
indicates
pcell
Prior art date
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PCT/US2023/070325
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English (en)
Inventor
Shanyu Zhou
Jelena Damnjanovic
Tao Luo
Original Assignee
Qualcomm Incorporated
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Publication date
Priority claimed from US18/352,105 external-priority patent/US20240080698A1/en
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Publication of WO2024054717A1 publication Critical patent/WO2024054717A1/fr

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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 a joint cell activation and timing advance command.
  • 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 (3 GPP).
  • UMTS Universal Mobile Telecommunications System
  • a wireless network may include one or more network nodes that support communication for wireless communication devices, such as a user equipment (UE) or multiple UEs.
  • a UE may communicate with a network node via downlink communications and uplink communications.
  • Downlink (or “DL”) refers to a communication link from the network node to the UE
  • uplink (or “UL”) refers to a communication link from the UE to the network node.
  • Some wireless networks may support device-to-device communication, such as via a local link (e.g., a sidelink (SL), a wireless local area network (WLAN) link, and/or a wireless personal area network (WPAN) link, among other examples).
  • SL sidelink
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • 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
  • MIMO multiple-input multiple -output
  • an apparatus for wireless communication at a user equipment includes one or more memories; and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to: receive, from a primary cell (PCell), a radio resource control (RRC) message that indicates a cell set and a measurement configuration; transmit, to the PCell, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and receive, from the PCell, a joint cell activation and timing advance command medium access control control element (MAC-CE), wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • PCell primary cell
  • RRC radio resource control
  • MAC-CE medium access control control element
  • an apparatus for wireless communication at a network node includes one or more memories; and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to: transmit, to a UE and via a PCell of the network node, an RRC message that indicates a cell set and a measurement configuration; receive, from the UE, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and transmit, to the UE and via the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • a method of wireless communication performed by an apparatus of a UE includes receiving, from a PCell, an RRC message that indicates a cell set and a measurement configuration; transmitting, to the PCell, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and receiving, from the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • a method of wireless communication performed by an apparatus of a network node includes transmitting, to a UE and via a PCell of the network node, an RRC message that indicates a cell set and a measurement configuration; receiving, from the UE, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and transmitting, to the UE and via the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive, from a PCell, an RRC message that indicates a cell set and a measurement configuration; transmit, to the PCell, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and receive, from the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a network node, cause the network node to: transmit, to a UE and via a PCell of the network node, an RRC message that indicates a cell set and a measurement configuration; receive, from the UE, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and transmit, to the UE and via the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • an apparatus for wireless communication includes means for receiving, from a PCell, an RRC message that indicates a cell set and a measurement configuration; means for transmitting, to the PCell, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and means for receiving, from the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • an apparatus for wireless communication includes means for transmitting, to a UE and via a PCell of the apparatus, an RRC message that indicates a cell set and a measurement configuration; means for receiving, from the UE, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and means for transmitting, to the UE and via the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network entity, 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
  • 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 network node 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 a configured cell set, in accordance with the present disclosure.
  • Fig. 5 is a diagram illustrating an example of legacy timing advance and cell activation or deactivation, in accordance with the present disclosure.
  • Figs. 6-9 are diagrams illustrating examples associated with a joint cell activation and timing advance command, in accordance with the present disclosure.
  • Figs. 10-11 are diagrams illustrating example processes associated with a joint cell activation and timing advance command, in accordance with the present disclosure.
  • FIGs. 12-13 are diagrams of example apparatuses for wireless communication, in accordance with the present disclosure.
  • aspects may be described herein using terminology commonly associated with a 5G or New Radio (NR) radio access technology (RAT), aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G).
  • NR New Radio
  • 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.
  • 5G e.g., NR
  • 4G e.g., Long Term Evolution (LTE) network
  • the wireless network 100 may include one or more network nodes 110 (shown as a network node 110a, a network node 110b, a network node 110c, and a network node 1 lOd), 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 entities.
  • a network node 110 is a network node that communicates with UEs 120. As shown, a network node 110 may include one or more network nodes.
  • a network node 110 may be an aggregated network node, meaning that the aggregated network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit).
  • RAN radio access network
  • a network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station), meaning that the network node 110 is configured to utilize a protocol stack that is physically or logically distributed among two or more nodes (such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs)).
  • CUs central units
  • DUs distributed units
  • RUs radio units
  • a network node 110 is or includes a network node that communicates with UEs 120 via a radio access link, such as an RU.
  • a network node 110 is or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU.
  • a network node 110 is or includes a network node that communicates with other network nodes 110 via a midhaul link or a core network via a backhaul link, such as a CU.
  • a network node 110 may include multiple network nodes, such as one or more RUs, one or more CUs, and/or one or more DUs.
  • a network node 110 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, a transmission reception point (TRP), a DU, an RU, a CU, a mobility element of a network, a core network node, a network element, a network equipment, a RAN node, or a combination thereof.
  • the network nodes 110 may be interconnected to one another or to one or more other network nodes 110 in the wireless network 100 through various types of fronthaul, midhaul, and/or backhaul interfaces, such as a direct physical connection, an air interface, or a virtual network, using any suitable transport network.
  • a network node 110 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a network node 110 and/or a network node subsystem serving this coverage area, depending on the context in which the term is used.
  • a network node 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 subscriptions.
  • 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)).
  • a network node 110 for a macro cell may be referred to as a macro network node.
  • a network node 110 for a pico cell may be referred to as a pico network node.
  • a network node 110 for a femto cell may be referred to as a femto network node or an in-home network node. In the example shown in Fig.
  • the network node 110a may be a macro network node for a macro cell 102a
  • the network node 110b may be a pico network node for a pico cell 102b
  • the network node 110c may be a femto network node for a femto cell 102c.
  • a network node 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 network node 110 that is mobile (e.g., a mobile network node).
  • base station or “network node” may refer to an aggregated base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof.
  • 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 terms “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 network node 110.
  • the terms “base station” or “network node” may refer to a plurality of devices configured to perform the one or more functions. For example, in some distributed systems, each of a quantity 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 terms “base station” or “network node” may refer to any one or more of those different devices.
  • the terms “base station” or “network node” may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device.
  • the terms “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 wireless network 100 may include one or more relay stations.
  • a relay station is a network node that can receive a transmission of data from an upstream node (e g., a network node 110 or a UE 120) and send a transmission of the data to a downstream node (e.g., a UE 120 or a network node 110).
  • a relay station may be a UE 120 that can relay transmissions for other UEs 120.
  • the network node 1 lOd e.g., a relay network node
  • the network node 110a e.g., a macro network node
  • the UE 120d in order to facilitate communication between the network node 110a and the UE 120d.
  • a network node 110 that relays communications may be referred to as a relay station, a relay base station, a relay network node, a relay node, a relay, or the like.
  • the wireless network 100 may be a heterogeneous network that includes network nodes 110 of different types, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, or the like. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and/or different impacts on interference in the wireless network 100.
  • macro network nodes may have a high transmit power level (e.g., 5 to 40 watts) whereas pico network nodes, femto network nodes, and relay network nodes 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 network nodes 110 and may provide coordination and control for these network nodes 110.
  • the network controller 130 may communicate with the network nodes 110 via a backhaul communication link or a midhaul communication link.
  • the network nodes 110 may communicate with one another directly or indirectly via a wireless or wireline backhaul communication link.
  • the network controller 130 may be a CU or a core network device, or may include a CU or a core network device.
  • 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), a vehicular component or sensor,
  • 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 network node, another device (e.g., a remote device), or some other entity.
  • Some UEs 120 may be considered Intemet-of-Things (loT) devices, and/or may be implemented as NB-IoT (narrowband loT) 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 network node 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 network node 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.
  • 5G NR 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.
  • Each of these higher frequency bands falls within the EHF band.
  • 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.
  • a UE may include a communication manager 140.
  • the communication manager 140 may receive, from a primary cell (PCell), a radio resource control (RRC) message that indicates a cell set and a measurement configuration; transmit, to the PCell, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration, wherein the cell set may include one or more cells which are candidate cells for inter-cell mobility, and wherein the inter-cell mobility corresponds to a serving cell change; and receive, from the PCell, a joint cell activation and timing advance command medium access control control element (MAC-CE), wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • the communication manager 140 may perform one or more other operations described herein.
  • a network node may include a communication manager 150.
  • the communication manager 150 may transmit, to a UE and via a PCell of the network node, an RRC message that indicates a cell set and a measurement configuration; receive, from the UE, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and transmit, to the UE and via the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell. Additionally, or alternatively, 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 network node 110 in communication with a UE 120 in a wireless network 100, in accordance with the present disclosure.
  • the network node 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).
  • the network node 110 of example 200 includes one or more radio frequency components, such as antennas 234 and a modem 254.
  • a network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include radio frequency components that facilitate direct communication with the UE 120, such as one or more CUs, or one or more DUs.
  • 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 network node 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 network node 110 and/or other network nodes 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., fdter, 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 network node 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 network node 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. 6-13).
  • 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 network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244.
  • the network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink and/or uplink communications.
  • the modem 232 of the network node 110 may include a modulator and a demodulator.
  • the network node 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. 6-13).
  • the controller/processor 240 of the network node 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 a joint cell activation and timing advance command, as described in more detail elsewhere herein.
  • the controller/processor 240 of the network node 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 1000 of Fig. 10, process 1100 of Fig. 11, and/or other processes as described herein.
  • the memory 242 and the memory 282 may store data and program codes for the network node 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 network node 110 and/or the UE 120, may cause the one or more processors, the UE 120, and/or the network node 110 to perform or direct operations of, for example, process 1000 of Fig. 10, process 1100 of Fig. 11, 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.
  • a UE (e.g., UE 120) includes means for receiving, from a PCell, an RRC message that indicates a cell set and a measurement configuration; means for transmitting, to the PCell, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and/or means for receiving, from the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • 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., network node 110) includes means for transmitting, to a UE and via a PCell of the network node, an RRC message that indicates a cell set and a measurement configuration; means for receiving, from the UE, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and/or means for transmitting, to the UE and via the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new 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.
  • an individual processor may perform all of the functions described as being performed by the one or more processors.
  • one or more processors may collectively perform a set of functions. For example, a first set of (one or more) processors of the one or more processors may perform a first function described as being performed by the one or more processors, and a second set of (one or more) processors of the one or more processors may perform a second function described as being performed by the one or more processors.
  • the first set of processors and the second set of processors may be the same set of processors or may be different sets of processors. Reference to “one or more processors” should be understood to refer to any one or more of the processors described in connection with Fig.
  • references to “one or more memories” should be understood to refer to any one or more memories of a corresponding device, such as the memory described in connection with Fig.
  • Fig. 2 functions described as being performed by one or more memories can be performed by the same subset of the one or more memories or different subsets of the one or more memories.
  • 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.
  • 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, a base station, or a network equipment may be implemented in an aggregated or disaggregated architecture.
  • a base station such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a TRP, or a cell, among other examples
  • a base station may be implemented as an aggregated base station (also known as a standalone base station or a monolithic base station) or a disaggregated base station.
  • Network entity or “network node” may refer to a disaggregated base station, or to one or more units of a disaggregated base station (such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof).
  • An aggregated base station may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e g., within a single device or unit).
  • a disaggregated base station e.g., a disaggregated network node
  • a CU may be implemented within a network 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 network 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, such as a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU), among other examples.
  • VCU virtual central unit
  • VDU virtual distributed unit
  • VRU virtual radio unit
  • Base station-type operation or network design may consider aggregation characteristics of base station functionality.
  • disaggregated base stations may be utilized in an IAB network, an open radio access network (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)) to facilitate scaling of communication systems by separating base station functionality into one or more units that can be individually deployed.
  • a disaggregated base station may include functionality implemented across two or more units at various physical locations, as well as functionality implemented for at least one unit virtually, which can enable flexibility in network design.
  • the various units of the disaggregated base station can be configured for wired or wireless communication with at least one other unit of the disaggregated base station.
  • Fig. 3 is a diagram illustrating an example disaggregated base station architecture 300, in accordance with the present disclosure.
  • the disaggregated base station architecture 300 may include a CU 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 control units (such as a Near-RT RIC 325 via an E2 link, or a 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 through Fl interfaces.
  • Each of the DUs 330 may communicate with one or more RUs 340 via respective fronthaul links.
  • Each of the RUs 340 may communicate with one or more UEs 120 via respective radio frequency (RF) access links.
  • RF radio frequency
  • Each of the units may include one or more interfaces or be coupled with 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 one or multiple communication interfaces of the respective unit, can be configured to communicate with one or more of the other units via the transmission medium.
  • each of 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, and 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) functions, packet data convergence protocol (PDCP) functions, or service data adaptation protocol (SDAP) functions, among other examples.
  • 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 (for example, Central Unit - User Plane (CU-UP) functionality), control plane functionality (for example, Central Unit - Control Plane (CU-CP) functionality), 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.
  • a CU-UP unit can communicate bidirectionally with a CU-CP unit via an interface, such as the El interface when implemented in an O-RAN configuration.
  • the CU 310 can be implemented to communicate with a DU 330, as necessary, for network control and signaling.
  • Each 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 MAC layer, and one or more high physical (PHY) layers depending, at least in part, on a functional split, such as a functional split defined by the 3GPP.
  • the one or more high PHY layers may be implemented by one or more modules for forward error correction (FEC) encoding and decoding, scrambling, and modulation and demodulation, among other examples.
  • FEC forward error correction
  • the DU 330 may further host one or more low PHY layers, such as implemented by one or more modules for a fast Fourier transform (FFT), an inverse FFT (iFFT), digital beamforming, or physical random access channel (PRACH) extraction and filtering, among other examples.
  • FFT fast Fourier transform
  • iFFT inverse FFT
  • PRACH physical random access channel
  • Each layer (which also may be referred to as a 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.
  • Each RU 340 may implement lower-layer functionality.
  • 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 an FFT, performing an iFFT, digital beamforming, or PRACH extraction and filtering, among other examples, based on a functional split (for example, a functional split defined by the 3GPP), such as a lower layer functional split.
  • a functional split for example, a functional split defined by the 3GPP
  • each RU 340 can be operated to handle over the air (OTA) communication with one or more UEs 120.
  • OTA over the air
  • the SMO Framework 305 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-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 01 interface).
  • the SMO Framework 305 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) platform 390) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an 02 interface).
  • a cloud computing platform such as an open cloud (O-Cloud) platform 390
  • network element life cycle management such as to instantiate virtualized network elements
  • cloud computing platform interface such as an 02 interface
  • virtualized network elements can include, but are not limited to, CUs 310, DUs 330, RUs 340, non-RT RICs 315, 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 01 interface.
  • OF-eNB open eNB
  • the SMO Framework 305 can communicate directly with each of one or more RUs 340 via a respective 01 interface.
  • the SMO Framework 305 also may include aNon-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 Al interface) the Near-RT RIC 325.
  • the Near-RT RIC 325 may be configured to include a logical function that enables near-realtime 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.
  • the Non-RT RIC 315 or the Near-RT RIC 325 may be configured to tune RAN behavior or performance.
  • 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 an 01 interface) or via creation of RAN management policies (such as Al interface policies).
  • Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.
  • a UE may connect with a network including a plurality of cells.
  • the UE may use LI and/or L2 based signaling to perform L1/L2 inter-cell mobility operations among the plurality of cells.
  • An L1/L2 based inter-cell mobility design may involve a configuration and maintenance for multiple candidate cells to allow a fast application of configurations for candidate cells.
  • the L1/L2 based inter-cell mobility design may involve a dynamic switch mechanism among candidate serving cells, which may include a special cell (SpCell) and a secondary cell (SCell), for potential applicable scenarios based at least in part on L1/L2 signaling.
  • the L1/L2 based inter-cell mobility design may involve LI enhancements for intercell beam management, which may include LI measurement and reporting, and beam indications.
  • the L1/L2 based inter-cell mobility design may involve a timing advance management.
  • An L1/L2 based inter-cell mobility procedure may be applicable to various scenarios.
  • the L1/L2 based inter-cell mobility procedure may be applicable to standalone, carrier aggregation, and/or NR dual connectivity scenarios with a serving cell change within one configured grant.
  • the L1/L2 based inter-cell mobility procedure may be applicable to an intra- DU scenario or an intra-CU inter-DU scenario (e.g., applicable for standalone and carrier aggregation).
  • the L1/L2 based inter-cell mobility procedure may be applicable to both intra frequencies and inter frequencies.
  • the L1/L2 based inter-cell mobility procedure may be applicable to both FR1 and FR2.
  • the L1/L2 based inter-cell mobility procedure may be applicable when source and target cells are synchronized or not synchronized.
  • the UE may be configured with a set of cells for L1/L2 based inter-cell mobility, which may be based at least in part on an RRC configuration.
  • a cell in a configured cell set may be considered to be an activated cell or a deactivated cell.
  • the configured cell set may include a PCell and SCells.
  • An activated cell set may refer to a group of cells that are able to be readily used for data and control transfer.
  • a deactivated cell set may refer to a group of cells that are able to be activated using L1/L2 based signaling.
  • a network node may perform a timing advance group (TAG) assignment.
  • TAG timing advance group
  • the network node may assign TAG information to different cells based at least in part on cell locations associated with the cells, operating bands, and/or UE locations. Cells that are associated with the same TAG identifier may share the same timing advance information. Mobility within the configured cell set may be based at least in part on L1/L2 based signaling, which may allow for activation/deactivation of cells in the configured cell set.
  • a timing advance value may be used to control a timing of uplink transmissions by the UE, such that the uplink transmissions may be received by the network node at a time that aligns with an internal timing of the network node.
  • the network node may determine the timing advance value to the UE (e.g., directly or via one or more network nodes) by measuring a time difference between reception of uplink transmissions from the UE and a subframe timing used by the network node (e.g., by determining a difference between when the uplink transmissions were supposed to have been received by the network node, according to the subframe timing, and when the uplink transmissions were actually received).
  • the network node may transmit a timing advance command to instruct the UE to transmit future uplink communications earlier or later to reduce or eliminate the time difference and align timing between the UE and network node.
  • the timing advance command may be used to offset timing differences between the UE and the network node due to different propagation delays that occur when the UE is different distances from the network node. If timing advance commands were not used, then uplink transmissions from different UEs (e.g., located at different distances from the network node) may collide due to mistiming even if the uplink transmissions are scheduled for different subframes.
  • Fig. 4 is a diagram illustrating an example 400 of a configured cell set, in accordance with the present disclosure.
  • the configured cell set may include a plurality of cells, such as a first cell (Cl), a second cell (C2), a third cell (C3), a fourth cell (C4), a fifth cell (C5), and a sixth cell (C6).
  • the plurality of cells may include candidate cells for layer 1 (LI) or layer 2 (L2) triggered mobility (LTM).
  • One or more cells of the plurality of cells may be configured to communicate with a UE.
  • a first TAG may be associated with a first group of cells (e.g., Cl and C2) within the plurality of cells.
  • a second TAG may be associated with a second group of cells (e g., C3 and C4) within the plurality of cells.
  • a third TAG may be associated with a third group of cells (e.g., C5 and C6) within the plurality of cells.
  • Some cells from the plurality of cells may be activated cells, and other cells from the plurality of cells may be deactivated cells.
  • the first cell, the third cell, and the fourth cell may be activated cells, and the second cell, the fifth cell, and the sixth cell may be deactivated cells.
  • the activated cells may be serving cells.
  • the deactivated cells may be serving cells and/or non-serving cells.
  • Fig. 4 is provided as an example. Other examples may differ from what is described with regard to Fig. 4.
  • a timing advance MAC-CE may be separated from an SCell activation/deactivation MAC-CE.
  • a new SCell may be activated by a cell activation MAC-CE.
  • a UE may perform a physical downlink control channel (PDCCH)-ordered random access control channel (RACH) procedure on that new SCell to obtain timing advance information for an uplink synchronization .
  • PDCCH physical downlink control channel
  • RACH random access control channel
  • Fig 5 is a diagram illustrating an example 500 of legacy timing advance and cell activation or deactivation, in accordance with the present disclosure.
  • a legacy timing advance MAC-CE may indicate a TAG identifier, which may be two bits, and a timing advance command, which may be six bits.
  • the legacy timing advance MAC-CE may be associated with one octet.
  • a legacy SCell activation/deactivation MAC-CE may indicate a Ci field, which may be one octet or four octets.
  • a Ci field value of “1” may activate an SCell i.
  • a Ci field value of “0” may deactivate an SCell i.
  • Fig. 5 is provided as an example. Other examples may differ from what is described with regard to Fig. 5.
  • L1/L2 based inter-cell mobility a fast cell activation/deactivation and timing advance may need to be facilitated.
  • a cell may be activated using L1/L2 based signaling.
  • the timing advance may need to be updated at a relatively high rate at a network node based at least in part on a UE measurement report.
  • the timing advance may need to be ready to use at the time of a new cell activation.
  • L1/L2 based inter-cell mobility may necessitate seamless mobility among configured cells, as well as reduced latency and improved system performance.
  • a legacy approach does not support such facilitation of a fast cell activation/deactivation and timing advance.
  • a UE may receive, from a network node, an SCell activation/deactivation MAC-CE, which may enable a new SCell to be activated. After the new SCell is activated, the UE may perform a PDCCH-ordered RACH procedure on that new SCell to obtain timing advance information. In other words, only after the new SCell is activated, the UE may receive a timing advance MAC-CE. An amount of time needed for the UE to receive both the SCell activation/deactivation MAC-CE and the timing advance MAC-CE may be relatively long, and thus may be insufficient for L1/L2 based intercell mobility.
  • a UE may receive, from a serving cell such as a PCell, an RRC message that indicates an L1/L2 inter-cell mobility cell set and a measurement configuration.
  • the cell set and the measurement configuration may be for LTM.
  • the UE may transmit, to the PCell, a measurement report that indicates one or more measurements of one or more cells indicated in the L1/L2 inter-cell mobility cell set.
  • the one or more measurements and reporting may be associated with an LI type (e g., beam level).
  • the UE may derive the one or more measurements based at least in part on the measurement configuration.
  • the UE may receive, from the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • the joint cell activation and timing advance command MAC-CE may be employed, such that timing advance information may be jointly signaled with a cell activation command.
  • a timing advance command and a cell activation/deactivation command may be combined into a single MAC-CE, which may eliminate a need for the UE to separately perform a RACH procedure to obtain the timing advance information.
  • the joint cell activation and timing advance command MAC-CE may be associated with a potential latency reduction, a quality of service (QoS) improvement, and/or power consumption savings.
  • QoS quality of service
  • the joint cell activation and timing advance command MAC-CE may reduce a signaling redundancy.
  • Fig. 6 is a diagram illustrating an example 600 associated with a joint cell activation and timing advance command, in accordance with the present disclosure.
  • example 600 includes communication between a UE (e.g., UE 120) and a network node (e.g., network node 110).
  • the UE and the network node may be included in a wireless network, such as wireless network 100.
  • a PCell associated with the network node may determine to configure a cell set, such as an L1/L2 inter-cell mobility cell set, for the UE.
  • the cell set may include one or more cells, which may be candidate cells for inter-cell mobility (e.g., a movement of the UE between cells).
  • An L1/L2 inter-cell mobility may correspond to a serving cell change via LI (e.g, downlink control information (DCI)) and/or L2 (e.g., MAC- CE) signaling.
  • the PCell may transmit, to the UE, an RRC message.
  • the RRC message may be an RRC configuration message or an RRC reconfiguration message.
  • the RRC message may indicate the L1/L2 inter-cell mobility cell set and a measurement configuration.
  • the cell set and the measurement configuration may be for LTM.
  • the measurement configuration may indicate the one or more cells to be measured by the UE.
  • the RRC message may indicate, to the UE, resources to be used by the UE for receiving a joint cell activation and timing advance command MAC-CE.
  • the RRC message may indicate, to the UE, an option (e.g., an implicit option or an explicit option), to be followed by the UE, for transmitting a confirmation regarding the joint cell activation and timing advance command MAC-CE to the PCell.
  • the RRC message may configure multiple values for parameters associated with the L1/L2 inter-cell mobility cell set, the resources to be used for receiving the joint cell activation and timing advance command MAC-CE, and/or options for transmitting the confirmation.
  • the PCell may use a separate MAC-CE or DCI to switch between configurations (or between values for the parameters).
  • the RRC message may indicate a first value that instructs the UE to transmit an acknowledgement (ACK) to the PCell and/or the new cell in response to a receipt of the joint cell activation and timing advance command MAC-CE, or a second value that instructs the UE to transmit a scheduling request (SR) to the new cell using a timing advance command indicated in the joint cell activation and timing advance command MAC-CE.
  • ACK acknowledgement
  • SR scheduling request
  • the UE may transmit, to the PCell, an RRC complete message.
  • the RRC complete message may be an RRC configuration complete message or an RRC reconfiguration complete message.
  • the UE may transmit the RRC complete message based at least in part on the RRC message received from the PCell.
  • the UE may perform measurements of the one or more cells.
  • the UE may perform the measurements of the one or more cells based at least in part on the measurement configuration indicated in the RRC message.
  • the UE may perform the measurements based at least in part on reference signals received from the one or more cells.
  • the UE may transmit, to the PCell, a measurement report that indicates the measurements associated with the one or more cells indicated in the cell set, where the measurements may be derived based at least in part on the measurement configuration.
  • the measurements may be associated with an LI type (e.g., beam level).
  • the UE may receive, from the PCell, the joint cell activation and timing advance command MAC-CE.
  • the joint cell activation and timing advance command MAC-CE may indicate an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • the timing advance information may indicate a TAG identifier associated with the new cell and a timing advance command associated with the TAG identifier.
  • the timing advance command may be based at least in part on the measurement report that indicates the measurements associated with the one or more cells indicated in the cell set.
  • the PCell may update the timing advance information based at least in part on the measurement report.
  • the timing advance command may be ready to use by the UE after the activation of the new cell.
  • the PCell may transmit, to the UE, the joint cell activation and timing advance command MAC-CE.
  • the joint cell activation and timing advance command MAC-CE may serve to activate the new cell (e.g., a new SCell or a new PCell) and to indicate a timing advance associated with the new cell.
  • the PCell may employ a single MAC-CE to both activate the new cell and indicate the timing advance associated with the new cell, which may eliminate a need for the UE to first perform a RACH procedure with the new cell before obtaining timing advance information associated with the new cell.
  • the UE may transmit, to the PCell and/or the new cell, the ACK.
  • the UE may transmit the ACK based at least in part on the joint cell activation and timing advance command MAC-CE received from the PCell.
  • the UE may transmit the SR to the new cell.
  • the UE may be able to transmit the SR to the new cell because the new cell was activated via the joint cell activation and timing advance command MAC-CE.
  • the UE may transmit the ACK and/or the SR based at least in part on the RRC message received from the PCell.
  • the UE may transmit data and/or control information to the new cell.
  • the UE may transmit, to the new cell, data or control information using the timing advance command indicated in the joint cell activation and timing advance command MAC-CE.
  • the UE may transmit, to the new cell, an SR using a timing advance command indicated in the joint cell activation and timing advance command MAC-CE, where a reception of the SR may indicate that the new cell is successfully activated.
  • the UE may transmit, to the PCell and/or the new cell, an ACK for the joint cell activation and timing advance command MAC-CE, where a reception of the ACK may indicate that the new cell is successfully activated.
  • the UE may provide the confirmation regarding the joint cell activation and timing advance command MAC-CE.
  • the UE may provide the confirmation implicitly.
  • the SR transmitted from the UE to the new cell (e.g., a newly activated cell) using a timing advance signaled via the joint cell activation and timing advance command MAC-CE may indicate a successful new cell addition.
  • the UE may provide the confirmation explicitly.
  • the UE may directly transmit, to the PCell and/or the new cell, the ACK for the joint cell activation and timing advance command MAC-CE. A receipt of the ACK may indicate the successful new cell addition.
  • Fig. 6 is provided as an example. Other examples may differ from what is described with regard to Fig. 6.
  • Fig. 7 is a diagram illustrating an example 700 associated with a joint cell activation and timing advance command, in accordance with the present disclosure.
  • a joint cell activation and timing advance command MAC-CE may be up to seven cell activations.
  • a first octet may indicate a Ci field.
  • a Ci field value of “1” may activate an SCell i.
  • a Ci field value of “0” may deactivate an SCell i.
  • a second octet and a third octet may be combination octets. The second octet and the third octet may be used in combination to represent a TAG identifier of an activated cell.
  • the second octet may include one bit and the third octet may include one bit, and these two bits may be used to represent the TAG identifier of the activated cell.
  • Two octets e.g., the second octet and the third octet
  • the joint cell activation and timing advance command MAC-CE may include timing advance information for each TAG identifier (e.g., each TAG identifier indicated by the second and third octets).
  • the timing advance information may include, for each TAG identifier, a corresponding timing advance command.
  • Fig. 7 is provided as an example. Other examples may differ from what is described with regard to Fig. 7.
  • Fig 8 is a diagram illustrating an example 800 associated with a joint cell activation and timing advance command, in accordance with the present disclosure.
  • a joint cell activation and timing advance command MAC-CE may activate three cells (e.g., Cl, C3, and C6).
  • a bit may be ” I " to indicate a corresponding cell that is activated, or a bit may be “0” to indicate that a corresponding cell is not activated.
  • a second octet and a third octet of the joint cell activation and timing advance command MAC-CE may be used to indicate TAG identifiers associated with each of the three activated cells.
  • one bit of the second octet and one bit of the third octet, which may each be associated with Cl may be combined to form “01”, which may indicate that TAG identifier 01 is associated with C 1.
  • One bit of the second octet and one bit of the third octet, which may each be associated with C3, may be combined to form “11”, which may indicate that TAG identifier 11 is associated with C3.
  • One bit of the second octet and one bit of the third octet, which may each be associated with C6, may be combined to form “01”, which may indicate that TAG identifier 01 is associated with C6.
  • the joint cell activation and timing advance command MAC-CE may indicate timing advance information for each of TAG identifier 00 and TAG identifier 01.
  • the joint cell activation and timing advance command MAC- CE may indicate a timing advance command associated with TAG identifier 00, as well as a timing advance command associated with TAG identifier 01.
  • Fig. 8 is provided as an example. Other examples may differ from what is described with regard to Fig. 8.
  • Fig. 9 is a diagram illustrating an example 900 associated with a joint cell activation and timing advance command, in accordance with the present disclosure.
  • a joint cell activation and timing advance command MAC-CE may be up to 31 cell activations.
  • Four octets may be used to indicate a Ci field (e.g., Ci to C31).
  • a Ci field value of “1” may activate an SCell i.
  • a fifth octet and a sixth octet may be used in combination to represent TAG identifiers of up to seven activated cells
  • a seventh octet and an eighth octet may be used in combination to represent TAG identifiers of up to another seven activated cells, and so on.
  • the joint cell activation and timing advance command MAC-CE may include timing advance information for each TAG identifier.
  • the timing advance information may include, for each TAG identifier, a corresponding timing advance command.
  • Fig. 9 is provided as an example. Other examples may differ from what is described with regard to Fig. 9.
  • Fig. 10 is a diagram illustrating an example process 1000 performed, for example, by a UE, in accordance with the present disclosure.
  • Example process 1000 is an example where the UE (e.g., UE 120) performs operations associated with a joint cell activation and timing advance command.
  • process 1000 may include receiving, from a PCell, an RRC message that indicates a cell set and a measurement configuration (block 1010).
  • the UE e.g., using communication manager 140 and/or reception component 1202, depicted in Fig. 12
  • process 1000 may include transmitting, to the PCell, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration (block 1020).
  • the UE e.g., using communication manager 140 and/or transmission component 1204, depicted in Fig. 12
  • process 1000 may include receiving, from the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell (block 1030).
  • the UE e.g., using communication manager 140 and/or reception component 1202, depicted in Fig. 12
  • Process 1000 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.
  • process 1000 includes transmitting, to the PCell, an RRC complete message based at least in part on the RRC message received from the PCell.
  • process 1000 includes performing the one or more measurements of the one or more cells based at least in part on the measurement configuration indicated in the RRC message.
  • the joint cell activation and timing advance command MAC-CE is a single MAC-CE that indicates both the activation of the new cell and the timing advance information associated with the new cell.
  • the timing advance information includes a TAG identifier associated with the new cell and a timing advance command associated with the TAG identifier.
  • process 1000 includes transmitting, to the new cell, an SR using a timing advance command indicated in the joint cell activation and timing advance command MAC-CE, wherein a reception of the SR indicates that the new cell is successfully activated.
  • process 1000 includes transmitting, to one or more of the PCell or the new cell, an ACK for the joint cell activation and timing advance command MAC-CE, wherein a reception of the ACK indicates that the new cell is successfully activated.
  • process 1000 includes transmitting, to the new cell, data or control information using a timing advance command indicated in the joint cell activation and timing advance command MAC-CE.
  • the new cell is a new PCell or a new SCell.
  • the RRC message indicates resources for receiving the joint cell activation and timing advance command MAC-CE.
  • the RRC message indicates a first value that instructs the UE to transmit an ACK to one or more of the PCell or the new cell in response to a receipt of the joint cell activation and timing advance command MAC-CE, or a second value that instructs the UE to transmit an SR to the new cell using a timing advance command indicated in the joint cell activation and timing advance command MAC-CE.
  • F ig . 10 shows example blocks of process 1000
  • process 1000 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 10. Additionally, or alternatively, two or more of the blocks of process 1000 may be performed in parallel.
  • Fig. 11 is a diagram illustrating an example process 1100 performed, for example, by a network node, in accordance with the present disclosure.
  • Example process 1100 is an example where the network node (e.g., network node 110) performs operations associated with a joint cell activation and timing advance command.
  • process 1100 may include transmitting, to a UE and via a PCell of the network node, an RRC message that indicates a cell set and a measurement configuration (block 1110).
  • the network node e.g., using transmission component 1304, depicted in Fig. 13
  • process 1100 may include receiving, from the UE, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration (block 1120).
  • the network node e g., using reception component 1302, depicted in Fig. 13
  • process 1100 may include transmitting, to the UE and via the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell (block 1130).
  • the network node e.g., using transmission component 1304, depicted in Fig.
  • a joint cell activation and timing advance command MAC-CE may transmit, to the UE and via the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell, as described above.
  • Process 1100 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 joint cell activation and timing advance command MAC-CE is a single MAC-CE that indicates both the activation of the new cell and the timing advance information associated with the new cell, wherein the timing advance information includes a TAG identifier associated with the new cell and a timing advance command associated with the TAG identifier.
  • process 1100 includes receiving, from the UE and via the PCell, an ACK for the joint cell activation and timing advance command MAC-CE, wherein a reception of the ACK indicates that the new cell is successfully activated.
  • the RRC message indicates resources for the UE to receive the joint cell activation and timing advance command MAC-CE.
  • Fig. 11 shows example blocks of process 1100
  • process 1100 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 11. Additionally, or alternatively, two or more of the blocks of process 1100 may be performed in parallel.
  • Fig. 12 is a diagram of an example apparatus 1200 for wireless communication, in accordance with the present disclosure.
  • the apparatus 1200 may be a UE, or a UE may include the apparatus 1200.
  • the apparatus 1200 includes a reception component 1202 and a transmission component 1204, which may be in communication with one another (for example, via one or more buses and/or one or more other components).
  • the apparatus 1200 may communicate with another apparatus 1206 (such as a UE, a base station, or another wireless communication device) using the reception component 1202 and the transmission component 1204.
  • the apparatus 1200 may include the communication manager 140.
  • the communication manager 140 may include a measurement component 1208, among other examples.
  • the apparatus 1200 may be configured to perform one or more operations described herein in connection with Figs. 6-9. Additionally, or alternatively, the apparatus 1200 may be configured to perform one or more processes described herein, such as process 1000 of Fig. 10.
  • the apparatus 1200 and/or one or more components shown in Fig. 12 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. 12 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 1202 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1206.
  • the reception component 1202 may provide received communications to one or more other components of the apparatus 1200.
  • the reception component 1202 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 1200.
  • the reception component 1202 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 1204 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1206.
  • one or more other components of the apparatus 1200 may generate communications and may provide the generated communications to the transmission component 1204 for transmission to the apparatus 1206.
  • the transmission component 1204 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 1206.
  • the transmission component 1204 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 1204 may be co-located with the reception component 1202 in a transceiver.
  • the reception component 1202 may receive, from a PCell, an RRC message that indicates a cell set and a measurement configuration.
  • the transmission component 1204 may transmit, to the PCell, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration.
  • the reception component 1202 may receive, from the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • the transmission component 1204 may transmit, to the PCell, an RRC complete message based at least in part on the RRC message received from the PCell.
  • the measurement component 1208 may perform the one or more measurements of the one or more cells based at least in part on the measurement configuration indicated in the RRC message.
  • the transmission component 1204 may transmit, to the new cell, an SR using a timing advance command indicated in the joint cell activation and timing advance command MAC-CE, wherein a reception of the SR indicates that the new cell is successfully activated.
  • the transmission component 1204 may transmit, to one or more of the PCell or the new cell, an ACK for the joint cell activation and timing advance command MAC-CE, wherein a reception of the ACK indicates that the new cell is successfully activated.
  • the transmission component 1204 may transmit, to the new cell, data or control information using a timing advance command indicated in the joint cell activation and timing advance command MAC-CE.
  • Fig. 12 is a diagram of an example apparatus 1300 for wireless communication, in accordance with the present disclosure.
  • the apparatus 1300 may be a network node, or a network node may include the apparatus 1300.
  • the apparatus 1300 includes a reception component 1302 and a transmission component 1304, which may be in communication with one another (for example, via one or more buses and/or one or more other components). As shown, the apparatus 1300 may communicate with another apparatus 1306 (such as a UE, a base station, or another wireless communication device) using the reception component 1302 and the transmission component 1304.
  • another apparatus 1306 such as a UE, a base station, or another wireless communication device
  • the apparatus 1300 may be configured to perform one or more operations described herein in connection with Figs. 6-9. Additionally, or alternatively, the apparatus 1300 may be configured to perform one or more processes described herein, such as process 1100 of Fig . 11.
  • the apparatus 1300 and/or one or more components shown in Fig. 13 may include one or more components of the network node described in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 13 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 1302 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1306.
  • the reception component 1302 may provide received communications to one or more other components of the apparatus 1300.
  • the reception component 1302 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 1300.
  • the reception component 1302 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 network node described in connection with Fig. 2.
  • the transmission component 1304 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1306.
  • one or more other components of the apparatus 1300 may generate communications and may provide the generated communications to the transmission component 1304 for transmission to the apparatus 1306.
  • the transmission component 1304 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 1306.
  • the transmission component 1304 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 network node described in connection with Fig. 2. In some aspects, the transmission component 1304 may be co-located with the reception component 1302 in a transceiver.
  • the transmission component 1304 may transmit, to a UE and via a PCell of the network node, an RRC message that indicates a cell set and a measurement configuration.
  • the reception component 1302 may receive, from the UE, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration.
  • the transmission component 1304 may transmit, to the UE and via the PCell, a joint cell activation and timing advance command MAC-CE, wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • the reception component 1302 may receive, from the UE and via the PCell, an ACK for the joint cell activation and timing advance command MAC-CE, wherein a reception of the ACK indicates that the new cell is successfully activated.
  • Fig. 13 The number and arrangement of components shown in Fig. 13 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. 13. Furthermore, two or more components shown in Fig. 13 may be implemented within a single component, or a single component shown in Fig. 13 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 13 may perform one or more functions described as being performed by another set of components shown in Fig. 13.
  • Aspect 1 A method of wireless communication performed by an apparatus of a user equipment (UE), comprising: receiving, from a primary cell (PCell), a radio resource control (RRC) message that indicates a cell set and a measurement configuration; transmitting, to the PCell, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and receiving, from the PCell, a joint cell activation and timing advance command medium access control control element (MAC-CE), wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • Aspect 2 The method of Aspect 1, further comprising: transmitting, to the PCell, an RRC complete message based at least in part on the RRC message received from the PCell.
  • Aspect 3 The method of any of Aspects 1 through 2, further comprising: performing the one or more measurements of the one or more cells based at least in part on the measurement configuration indicated in the RRC message.
  • Aspect 4 The method of any of Aspects 1 through 3, wherein the joint cell activation and timing advance command MAC-CE is a single MAC-CE that indicates both the activation of the new cell and the timing advance information associated with the new cell.
  • Aspect 5 The method of any of Aspects 1 through 4, wherein the timing advance information includes a timing advance group (TAG) identifier associated with the new cell and a timing advance command associated with the TAG identifier.
  • TAG timing advance group
  • Aspect 6 The method of any of Aspects 1 through 5, further comprising: transmitting, to the new cell, a scheduling request (SR) using a timing advance command indicated in the joint cell activation and timing advance command MAC-CE, wherein a reception of the SR indicates that the new cell is successfully activated.
  • SR scheduling request
  • Aspect 7 The method of any of Aspects 1 through 6, further comprising: transmitting, to one or more of the PCell or the new cell, an acknowledgement (ACK) for the joint cell activation and timing advance command MAC-CE, wherein a reception of the ACK indicates that the new cell is successfully activated.
  • ACK acknowledgement
  • Aspect 8 The method of any of Aspects 1 through 7, further comprising: transmitting, to the new cell, data or control information using a timing advance command indicated in the joint cell activation and timing advance command MAC-CE.
  • Aspect 9 The method of any of Aspects 1 through 8, wherein the new cell is a new PCell or a new secondary cell.
  • Aspect 10 The method of any of Aspects 1 through 9, wherein the RRC message indicates resources for receiving the joint cell activation and timing advance command MAC- CE.
  • Aspect 11 The method of any of Aspects 1 through 10, wherein the RRC message indicates a first value that instructs the UE to transmit an acknowledgement to one or more of the PCell or the new cell in response to a receipt of the joint cell activation and timing advance command MAC-CE, or a second value that instructs the UE to transmit a scheduling request to the new cell using a timing advance command indicated in the joint cell activation and timing advance command MAC-CE.
  • a method of wireless communication performed by an apparatus of a network node comprising: transmitting, to a user equipment (UE) and via a primary cell (PCell) of the network node, a radio resource control (RRC) message that indicates a cell set and a measurement configuration; receiving, from the UE, a measurement report that indicates one or more measurements of one or more cells indicated in the cell set, wherein the one or more measurements are derived based at least in part on the measurement configuration; and transmitting, to the UE and via the PCell, a joint cell activation and timing advance command medium access control control element (MAC-CE), wherein the joint cell activation and timing advance command MAC-CE indicates an activation of a new cell, of the one or more cells, and timing advance information associated with the new cell.
  • RRC radio resource control
  • Aspect 13 The method of Aspect 12, wherein the joint cell activation and timing advance command MAC-CE is a single MAC-CE that indicates both the activation of the new cell and the timing advance information associated with the new cell, wherein the timing advance information includes a timing advance group (TAG) identifier associated with the new cell and a timing advance command associated with the TAG identifier.
  • TAG timing advance group
  • Aspect 14 The method of any of Aspects 12 through 13, further comprising: receiving, from the UE and via the PCell, an acknowledgement (ACK) for the joint cell activation and timing advance command MAC-CE, wherein a reception of the ACK indicates that the new cell is successfully activated.
  • ACK acknowledgement
  • Aspect 15 The method of any of Aspects 12 through 14, wherein the RRC message indicates resources for the UE to receive the joint cell activation and timing advance command MAC-CE.
  • Aspect 16 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 1-11.
  • Aspect 17 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 1-11.
  • Aspect 18 An apparatus for wireless communication, comprising at least one means for performing the method of one or more of Aspects 1-11.
  • Aspect 19 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instractions executable by a processor to perform the method of one or more of Aspects 1-11.
  • Aspect 20 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 1-11.
  • 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 12-15.
  • 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 12-15.
  • Aspect 23 An apparatus for wireless communication, comprising at least one means for performing the method of one or more of Aspects 12-15.
  • 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 12-15.
  • 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 12-15.
  • 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. The actual specialized control hardware or software code used to implement these systems and/or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and/or methods are described herein without reference to specific software code, since those skilled in the art will understand that software and hardware can be designed to implement the systems and/or methods based, at least in part, on the description herein.
  • 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). Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, 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’).

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Abstract

Divers aspects de la présente divulgation se rapportent de façon générale à la communication sans fil. Selon certains aspects, un équipement utilisateur (UE) peut recevoir, en provenance d'une cellule primaire (PCell), un message de contrôle des ressources radioélectriques (RRC) qui indique un ensemble de cellules à mobilité intercellulaire et une configuration de mesurage. L'UE peut transmettre, à la PCell, un rapport de mesurage qui indique un ou plusieurs mesurages d'une ou plusieurs cellules indiquées dans l'ensemble de cellules à mobilité intercellulaire, le ou les mesurages étant déduits sur la base, au moins en partie, de la configuration de mesurage. L'UE peut recevoir, en provenance de la PCell, un élément de commande de contrôle d'accès au support (MAC-CE) d'une instruction conjointe d'activation de cellule et d'avance temporelle, dans lequel le MAC-CE d'instruction conjointe d'activation de cellule et d'avance temporelle indique une activation d'une nouvelle cellule, de la ou des cellules, et des informations d'avance temporelle associées à la nouvelle cellule. De nombreux autres aspects sont décrits.
PCT/US2023/070325 2022-09-07 2023-07-17 Instruction conjointe d'activation de cellule et d'avance temporelle WO2024054717A1 (fr)

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US18/352,105 US20240080698A1 (en) 2022-09-07 2023-07-13 Joint cell activation and timing advance command

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