WO2024026599A1 - Mappage semi-statique d'états de transmission unifiés pour la réception de canal de commande à points multiples - Google Patents

Mappage semi-statique d'états de transmission unifiés pour la réception de canal de commande à points multiples Download PDF

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Publication number
WO2024026599A1
WO2024026599A1 PCT/CN2022/109354 CN2022109354W WO2024026599A1 WO 2024026599 A1 WO2024026599 A1 WO 2024026599A1 CN 2022109354 W CN2022109354 W CN 2022109354W WO 2024026599 A1 WO2024026599 A1 WO 2024026599A1
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WO
WIPO (PCT)
Prior art keywords
tci
tci state
control channel
mac
index
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PCT/CN2022/109354
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English (en)
Inventor
Hong He
Dawei Zhang
Wei Zeng
Chunhai Yao
Huaning Niu
Jie Cui
Original Assignee
Apple Inc.
Chunhai Yao
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Publication date
Application filed by Apple Inc., Chunhai Yao filed Critical Apple Inc.
Priority to PCT/CN2022/109354 priority Critical patent/WO2024026599A1/fr
Publication of WO2024026599A1 publication Critical patent/WO2024026599A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • the present application relates to wireless communications, and more particularly to systems, apparatuses, and methods for communication using unified transmission control states for multi-transmission-reception-point operation in a wireless communication system.
  • Wireless communication systems are rapidly growing in usage.
  • wireless devices such as smart phones and tablet computers have become increasingly sophisticated.
  • mobile devices i.e., user equipment devices or UEs
  • GPS global positioning system
  • wireless communication standards include GSM, UMTS (associated with, for example, WCDMA or TD-SCDMA air interfaces) , LTE, LTE Advanced (LTE-A) , NR, HSPA, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD) , IEEE 802.11 (WLAN or Wi-Fi) , BLUETOOTH TM , etc.
  • wireless communication devices also creates a continuous need for improvement in both wireless communications and in wireless communication devices.
  • UE user equipment
  • it is important to ensure the accuracy of transmitted and received signals through user equipment (UE) devices e.g., through wireless devices such as cellular phones, base stations and relay stations used in wireless cellular communications.
  • UE user equipment
  • increasing the functionality of a UE device can place a significant strain on the battery life of the UE device.
  • Embodiments are presented herein of apparatuses, systems, and methods for communication using unified transmission control states for multi-transmission-reception-point operation in a wireless communication system.
  • One set of embodiments may include a method, by a user equipment (UE) .
  • the method may include establishing communication with a cellular network via a plurality of transmission and reception points (TRPs) and receiving, from the cellular network, a unified indication of a plurality of transmission control indication (TCI) states activated for downlink communication from the plurality of TRPs.
  • the method may further comprise receiving, from the cellular network, a media access control (MAC) control element (MAC-CE) comprising an index of a first TCI state of the plurality of TCI states and selecting, based on the index, the first TCI state for monitoring of control channel messages from the plurality of TRPs.
  • MAC media access control
  • MAC-CE media access control element
  • the method may further comprise monitoring a control channel for control channel messages according to the first TCI state; receiving, from at least one TRP of the plurality of TRPs and using the first TCI state, a first control channel message; and exchanging data with the cellular network according to the first control channel message.
  • a method, at a cellular network may comprise: establishing communication with a user equipment (UE) via a plurality of transmission and reception points (TRPs) and transmitting, to the UE, a unified indication of a plurality of transmission control indication (TCI) states activated for downlink communication via the plurality of TRPs.
  • the method may further comprise selecting, a first TCI state of the plurality of TCI states for transmission of control channel messages to the UE and transmitting, to the UE, a media access control (MAC) control element (MAC-CE) comprising an index of the first TCI state.
  • the method may further comprise transmitting, to the UE and using the first TCI state, a first control channel message and exchanging data with the UE according to the first control channel message.
  • the techniques described herein may be implemented in and/or used with a number of different types of devices, including but not limited to base stations, access points, cellular phones, portable media players, tablet computers, wearable devices, unmanned aerial vehicles, unmanned aerial controllers, automobiles and/or motorized vehicles, and various other computing devices.
  • Figure 1 illustrates an exemplary (and simplified) wireless communication system, according to some embodiments.
  • Figure 2 illustrates an exemplary base station in communication with an exemplary wireless user equipment (UE) device, according to some embodiments.
  • UE wireless user equipment
  • Figure 3 illustrates an exemplary block diagram of a UE, according to some embodiments.
  • Figure 4 illustrates an exemplary block diagram of a base station, according to some embodiments.
  • Figure 5 is a communication flow diagram illustrating aspects of an exemplary possible method for communication using unified transmission control states for multi-TRP operation in a wireless communication system, according to some embodiments.
  • Figures 6-19 illustrate exemplary aspects of various possible approaches to communication using unified transmission control states for multi-TRP operation in a wireless communication system, according to some embodiments.
  • ⁇ UE User Equipment
  • ⁇ RF Radio Frequency
  • ⁇ BS Base Station
  • ⁇ UMTS Universal Mobile Telecommunication System
  • ⁇ RAT Radio Access Technology
  • ⁇ PDCCH Physical Downlink Control Channel
  • Memory Medium Any of various types of non-transitory memory devices or storage devices.
  • the term “memory medium” is intended to include an installation medium, e.g., a CD-ROM, floppy disks, or tape device; a computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; a non-volatile memory such as a Flash, magnetic media, e.g., a hard drive, or optical storage; registers, or other similar types of memory elements, etc.
  • the memory medium may include other types of non-transitory memory as well or combinations thereof.
  • the memory medium may be located in a first computer system in which the programs are executed, or may be located in a second different computer system which connects to the first computer system over a network, such as the Internet. In the latter instance, the second computer system may provide program instructions to the first computer system for execution.
  • the term “memory medium” may include two or more memory mediums which may reside in different locations, e.g., in different computer systems that are connected over a network.
  • the memory medium may store program instructions (e.g., embodied as computer programs) that may be executed by one or more processors.
  • Carrier Medium a memory medium as described above, as well as a physical transmission medium, such as a bus, network, and/or other physical transmission medium that conveys signals such as electrical, electromagnetic, or digital signals.
  • a physical transmission medium such as a bus, network, and/or other physical transmission medium that conveys signals such as electrical, electromagnetic, or digital signals.
  • Computer System any of various types of computing or processing systems, including a personal computer system (PC) , mainframe computer system, workstation, network appliance, Internet appliance, personal digital assistant (PDA) , television system, grid computing system, or other device or combinations of devices.
  • PC personal computer system
  • mainframe computer system workstation
  • network appliance Internet appliance
  • PDA personal digital assistant
  • television system grid computing system, or other device or combinations of devices.
  • computer system may be broadly defined to encompass any device (or combination of devices) having at least one processor that executes instructions from a memory medium.
  • UE User Equipment
  • UE Device any of various types of computer systems or devices that are mobile or portable and that perform wireless communications.
  • UE devices include mobile telephones or smart phones (e.g., iPhone TM , Android TM -based phones) , tablet computers (e.g., iPad TM , Samsung Galaxy TM ) , portable gaming devices (e.g., Nintendo DS TM , PlayStation Portable TM , Gameboy Advance TM , iPhone TM ) , wearable devices (e.g., smart watch, smart glasses) , laptops, PDAs, portable Internet devices, music players, data storage devices, other handheld devices, automobiles and/or motor vehicles, unmanned aerial vehicles (UAVs) (e.g., drones) , UAV controllers (UACs) , etc.
  • UAVs unmanned aerial vehicles
  • UAVs unmanned aerial vehicles
  • UAV controllers UAV controllers
  • Wireless Device any of various types of computer systems or devices that perform wireless communications.
  • a wireless device can be portable (or mobile) or may be stationary or fixed at a certain location.
  • a UE is an example of a wireless device.
  • a Communication Device any of various types of computer systems or devices that perform communications, where the communications can be wired or wireless.
  • a communication device can be portable (or mobile) or may be stationary or fixed at a certain location.
  • a wireless device is an example of a communication device.
  • a UE is another example of a communication device.
  • Base Station has the full breadth of its ordinary meaning, and at least includes a wireless communication station installed at a fixed location and used to communicate as part of a wireless telephone system or radio system.
  • Processing Element refers to various elements or combinations of elements that are capable of performing a function in a device, e.g., in a user equipment device or in a cellular network device.
  • Processing elements may include, for example: processors and associated memory, portions or circuits of individual processor cores, entire processor cores, processor arrays, circuits such as an ASIC (Application Specific Integrated Circuit) , programmable hardware elements such as a field programmable gate array (FPGA) , as well any of various combinations of the above.
  • ASIC Application Specific Integrated Circuit
  • Wi-Fi has the full breadth of its ordinary meaning, and at least includes a wireless communication network or RAT that is serviced by wireless LAN (WLAN) access points and which provides connectivity through these access points to the Internet.
  • WLAN wireless LAN
  • Most modern Wi-Fi networks (or WLAN networks) are based on IEEE 802.11 standards and are marketed under the name “Wi-Fi” .
  • Wi-Fi (WLAN) network is different from a cellular network.
  • Automatically refers to an action or operation performed by a computer system (e.g., software executed by the computer system) or device (e.g., circuitry, programmable hardware elements, ASICs, etc. ) , without user input directly specifying or performing the action or operation.
  • a computer system e.g., software executed by the computer system
  • device e.g., circuitry, programmable hardware elements, ASICs, etc.
  • An automatic procedure may be initiated by input provided by the user, but the subsequent actions that are performed “automatically” are not specified by the user, i.e., are not performed “manually” , where the user specifies each action to perform.
  • a user filling out an electronic form by selecting each field and providing input specifying information is filling out the form manually, even though the computer system must update the form in response to the user actions.
  • the form may be automatically filled out by the computer system where the computer system (e.g., software executing on the computer system) analyzes the fields of the form and fills in the form without any user input specifying the answers to the fields.
  • the user may invoke the automatic filling of the form, but is not involved in the actual filling of the form (e.g., the user is not manually specifying answers to fields but rather they are being automatically completed) .
  • the present specification provides various examples of operations being automatically performed in response to actions the user has taken.
  • Configured to Various components may be described as “configured to” perform a task or tasks.
  • “configured to” is a broad recitation generally meaning “having structure that” performs the task or tasks during operation. As such, the component can be configured to perform the task even when the component is not currently performing that task (e.g., a set of electrical conductors may be configured to electrically connect a module to another module, even when the two modules are not connected) .
  • “configured to” may be a broad recitation of structure generally meaning “having circuitry that” performs the task or tasks during operation. As such, the component can be configured to perform the task even when the component is not currently on.
  • the circuitry that forms the structure corresponding to “configured to” may include hardware circuits.
  • Figure 1 illustrates an exemplary (and simplified) wireless communication system in which aspects of this disclosure may be implemented, according to some embodiments. It is noted that the system of Figure 1 is merely one example of a possible system, and embodiments may be implemented in any of various systems, as desired.
  • the exemplary wireless communication system includes a base station 102 which communicates over a transmission medium with one or more (e.g., an arbitrary number of) user devices 106A, 106B, etc. through 106N.
  • Each of the user devices may be referred to herein as a “user equipment” (UE) or UE device.
  • UE user equipment
  • the user devices 106 are referred to as UEs or UE devices.
  • the base station 102 may be a base transceiver station (BTS) or cell site, and may include hardware and/or software that enables wireless communication with the UEs 106A through 106N. If the base station 102 is implemented in the context of LTE, it may alternately be referred to as an 'eNodeB' or 'eNB' . If the base station 102 is implemented in the context of 5G NR, it may alternately be referred to as a 'gNodeB' or 'gNB' .
  • the base station 102 may also be equipped to communicate with a network 100 (e.g., a core network of a cellular service provider, a telecommunication network such as a public switched telephone network (PSTN) , and/or the Internet, among various possibilities) .
  • a network 100 e.g., a core network of a cellular service provider, a telecommunication network such as a public switched telephone network (PSTN) , and/or the Internet, among various possibilities
  • PSTN public switched telephone network
  • the base station 102 may facilitate communication among the user devices and/or between the user devices and the network 100.
  • the communication area (or coverage area) of the base station may be referred to as a “cell. ”
  • a base station may sometimes be considered as representing the network insofar as uplink and downlink communications of the UE are concerned.
  • a UE communicating with one or more base stations in the network may also be interpreted as the UE communicating with the network.
  • the base station 102 and the user devices may be configured to communicate over the transmission medium using any of various radio access technologies (RATs) , also referred to as wireless communication technologies, or telecommunication standards, such as GSM, UMTS (WCDMA) , LTE, LTE-Advanced (LTE-A) , LAA/LTE-U, 5G NR, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD) , Wi-Fi, etc.
  • RATs radio access technologies
  • WCDMA UMTS
  • LTE LTE-Advanced
  • LAA/LTE-U LAA/LTE-U
  • 5G NR 5G NR
  • 3GPP2 CDMA2000 e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD
  • Wi-Fi Wi-Fi
  • Base station 102 and other similar base stations operating according to the same or a different cellular communication standard may thus be provided as one or more networks of cells, which may provide continuous or nearly continuous overlapping service to UE 106 and similar devices over a geographic area via one or more cellular communication standards.
  • a UE 106 may be capable of communicating using multiple wireless communication standards.
  • a UE 106 might be configured to communicate using either or both of a 3GPP cellular communication standard or a 3GPP2 cellular communication standard.
  • the UE 106 may be configured to perform techniques for communication using unified TCI states for multi-TRP operation in a wireless communication system, such as according to the various methods described herein.
  • the UE 106 might also or alternatively be configured to communicate using WLAN, BLUETOOTH TM , one or more global navigational satellite systems (GNSS, e.g., GPS or GLONASS) , one and/or more mobile television broadcasting standards (e.g., ATSC-M/H) , etc.
  • GNSS global navigational satellite systems
  • ATSC-M/H mobile television broadcasting standards
  • FIG. 2 illustrates an exemplary user equipment 106 (e.g., one of the devices 106A through 106N) in communication with the base station 102, according to some embodiments.
  • the UE 106 may be a device with wireless network connectivity such as a mobile phone, a hand-held device, a wearable device, a computer or a tablet, an unmanned aerial vehicle (UAV) , an unmanned aerial controller (UAC) , an automobile, or virtually any type of wireless device.
  • the UE 106 may include a processor (processing element) that is configured to execute program instructions stored in memory. The UE 106 may perform any of the method embodiments described herein by executing such stored instructions.
  • the UE 106 may include a programmable hardware element such as an FPGA (field-programmable gate array) , an integrated circuit, and/or any of various other possible hardware components that are configured to perform (e.g., individually or in combination) any of the method embodiments described herein, or any portion of any of the method embodiments described herein.
  • the UE 106 may be configured to communicate using any of multiple wireless communication protocols. For example, the UE 106 may be configured to communicate using two or more of CDMA2000, LTE, LTE-A, 5G NR, WLAN, or GNSS. Other combinations of wireless communication standards are also possible.
  • the UE 106 may include one or more antennas for communicating using one or more wireless communication protocols according to one or more RAT standards. In some embodiments, the UE 106 may share one or more parts of a receive chain and/or transmit chain between multiple wireless communication standards.
  • the shared radio may include a single antenna, or may include multiple antennas (e.g., for multiple-input, multiple-output or “MIMO” ) for performing wireless communications.
  • a radio may include any combination of a baseband processor, analog RF signal processing circuitry (e.g., including filters, mixers, oscillators, amplifiers, etc. ) , or digital processing circuitry (e.g., for digital modulation as well as other digital processing) .
  • the radio may implement one or more receive and transmit chains using the aforementioned hardware.
  • the UE 106 may share one or more parts of a receive and/or transmit chain between multiple wireless communication technologies, such as those discussed above.
  • the UE 106 may include any number of antennas and may be configured to use the antennas to transmit and/or receive directional wireless signals (e.g., beams) .
  • the BS 102 may also include any number of antennas and may be configured to use the antennas to transmit and/or receive directional wireless signals (e.g., beams) .
  • the antennas of the UE 106 and/or BS 102 may be configured to apply different “weight” to different antennas. The process of applying these different weights may be referred to as “precoding” .
  • the UE 106 may include separate transmit and/or receive chains (e.g., including separate antennas and other radio components) for each wireless communication protocol with which it is configured to communicate.
  • the UE 106 may include one or more radios that are shared between multiple wireless communication protocols, and one or more radios that are used exclusively by a single wireless communication protocol.
  • the UE 106 may include a shared radio for communicating using either of LTE or CDMA2000 1xRTT (or LTE or NR, or LTE or GSM) , and separate radios for communicating using each of Wi-Fi and BLUETOOTH TM .
  • LTE or CDMA2000 1xRTT or LTE or NR, or LTE or GSM
  • separate radios for communicating using each of Wi-Fi and BLUETOOTH TM .
  • Other configurations are also possible.
  • the UE 106 may include multiple subscriber identity modules (SIMs, sometimes referred to as SIM cards) .
  • SIMs subscriber identity modules
  • MUSIM multi-SIM
  • Any of the various SIMs may be physical SIMs (e.g., SIM cards) or embedded (e.g., virtual) SIMs. Any combination of physical and/or virtual SIMs may be included.
  • Each SIM may provide various services (e.g., packet switched and/or circuit switched services) to the user.
  • UE 106 may share common receive (Rx) and/or transmit (Tx) chains for multiple SIMs (e.g., UE 106 may have a dual SIM dual standby architecture) .
  • Rx receive
  • Tx transmit
  • Other architectures are possible.
  • UE 106 may be a dual SIM dual active architecture, may include separate Tx and/or Rx chains for the various SIMs, may include more than two SIMs, etc.
  • the different identities may have different identifiers, e.g., different UE identities (UE IDs) .
  • UE IDs UE identities
  • an international mobile subscriber identity (IMSI) may be an identity associated with a SIM (e.g., in a MUSIM device each SIM may have its own IMSI) .
  • the IMSI may be unique.
  • each SIM may have its own unique international mobile equipment identity (IMEI) .
  • IMEI international mobile equipment identity
  • the IMSI and/or IMEI may be examples of possible UE IDs, however other identifiers may be used as UE ID.
  • the different identities may have the same or different relationships to various public land mobile networks (PLMNs) .
  • PLMNs public land mobile networks
  • a first identity may have a first home PLMN
  • a second identity may have a different home PLMN.
  • one identity may be camped on a home network (e.g., on a cell provided by BS 102) while another identity may be roaming (e.g., while also camped on the same cell provided by BS 102, or a different cell provided by the same or different BS 102) .
  • multiple identities may be concurrently home (e.g., on the same or different cells of the same or different networks) or may be concurrently roaming (e.g., on the same or different cells of the same or different networks) .
  • SIM-A may be roaming into SIM-B’s network (SIM-A CMCC user roaming into AT&T and SIM-B is also AT&T) .
  • FIG. 3 illustrates a block diagram of an exemplary UE 106, according to some embodiments.
  • the UE 106 may include a system on chip (SOC) 300, which may include portions for various purposes.
  • the SOC 300 may include processor (s) 302 which may execute program instructions for the UE 106 and display circuitry 304 which may perform graphics processing and provide display signals to the display 360.
  • the SOC 300 may also include sensor circuitry 370, which may include components for sensing or measuring any of a variety of possible characteristics or parameters of the UE 106.
  • the sensor circuitry 370 may include motion sensing circuitry configured to detect motion of the UE 106, for example using a gyroscope, accelerometer, and/or any of various other motion sensing components.
  • the sensor circuitry 370 may include one or more temperature sensing components, for example for measuring the temperature of each of one or more antenna panels and/or other components of the UE 106. Any of various other possible types of sensor circuitry may also or alternatively be included in UE 106, as desired.
  • the processor (s) 302 may also be coupled to memory management unit (MMU) 340, which may be configured to receive addresses from the processor (s) 302 and translate those addresses to locations in memory (e.g., memory 306, read only memory (ROM) 350, NAND flash memory 310) and/or to other circuits or devices, such as the display circuitry 304, radio 330, connector I/F 320, and/or display 360.
  • MMU memory management unit
  • the MMU 340 may be configured to perform memory protection and page table translation or set up. In some embodiments, the MMU 340 may be included as a portion of the processor (s) 302.
  • the SOC 300 may be coupled to various other circuits of the UE 106.
  • the UE 106 may include various types of memory (e.g., including NAND flash 310) , a connector interface 320 (e.g., for coupling to a computer system, dock, charging station, etc. ) , the display 360, and wireless communication circuitry 330 (e.g., for LTE, LTE-A, NR, CDMA2000, BLUETOOTH TM , Wi-Fi, GPS, etc. ) .
  • the UE device 106 may include or couple to at least one antenna (e.g., 335a) , and possibly multiple antennas (e.g., illustrated by antennas 335a and 335b) , for performing wireless communication with base stations and/or other devices.
  • Antennas 335a and 335b are shown by way of example, and UE device 106 may include fewer or more antennas. Overall, the one or more antennas are collectively referred to as antenna 335.
  • the UE device 106 may use antenna 335 to perform the wireless communication with the aid of radio circuitry 330.
  • the communication circuitry may include multiple receive chains and/or multiple transmit chains for receiving and/or transmitting multiple spatial streams, such as in a multiple-input multiple output (MIMO) configuration.
  • MIMO multiple-input multiple output
  • the UE may be configured to communicate wirelessly using multiple wireless communication standards in some embodiments.
  • the UE 106 may include hardware and software components for implementing methods for the UE 106 to perform techniques for communication using unified TCI states for multi-TRP operation in a wireless communication system, such as described further subsequently herein.
  • the processor (s) 302 of the UE device 106 may be configured to implement part or all of the methods described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium) .
  • processor (s) 302 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array) , or as an ASIC (Application Specific Integrated Circuit) .
  • FPGA Field Programmable Gate Array
  • ASIC Application Specific Integrated Circuit
  • processor (s) 302 may be coupled to and/or may interoperate with other components as shown in Figure 3, to perform techniques for communication using unified TCI states for multi-TRP operation in a wireless communication system according to various embodiments disclosed herein.
  • Processor (s) 302 may also implement various other applications and/or end-user applications running on UE 106.
  • radio 330 may include separate controllers dedicated to controlling communications for various respective RAT standards.
  • radio 330 may include a Wi-Fi controller 352, a cellular controller (e.g., LTE and/or LTE-A controller) 354, and BLUETOOTH TM controller 356, and in at least some embodiments, one or more or all of these controllers may be implemented as respective integrated circuits (ICs or chips, for short) in communication with each other and with SOC 300 (and more specifically with processor (s) 302) .
  • ICs or chips integrated circuits
  • Wi-Fi controller 352 may communicate with cellular controller 354 over a cell-ISM link or WCI interface, and/or BLUETOOTH TM controller 356 may communicate with cellular controller 354 over a cell-ISM link, etc. While three separate controllers are illustrated within radio 330, other embodiments have fewer or more similar controllers for various different RATs that may be implemented in UE device 106.
  • controllers may implement functionality associated with multiple radio access technologies.
  • the cellular controller 354 may, in addition to hardware and/or software components for performing cellular communication, include hardware and/or software components for performing one or more activities associated with Wi-Fi, such as Wi-Fi preamble detection, and/or generation and transmission of Wi-Fi physical layer preamble signals.
  • FIG. 4 illustrates a block diagram of an exemplary base station 102, according to some embodiments. It is noted that the base station of Figure 4 is merely one example of a possible base station. As shown, the base station 102 may include processor (s) 404 which may execute program instructions for the base station 102. The processor (s) 404 may also be coupled to memory management unit (MMU) 440, which may be configured to receive addresses from the processor (s) 404 and translate those addresses to locations in memory (e.g., memory 460 and read only memory (ROM) 450) or to other circuits or devices.
  • MMU memory management unit
  • the base station 102 may include at least one network port 470.
  • the network port 470 may be configured to couple to a telephone network and provide a plurality of devices, such as UE devices 106, access to the telephone network as described above in Figures 1 and 2.
  • the network port 470 (or an additional network port) may also or alternatively be configured to couple to a cellular network, e.g., a core network of a cellular service provider.
  • the core network may provide mobility related services and/or other services to a plurality of devices, such as UE devices 106.
  • the network port 470 may couple to a telephone network via the core network, and/or the core network may provide a telephone network (e.g., among other UE devices serviced by the cellular service provider) .
  • base station 102 may be a next generation base station, e.g., a 5G New Radio (5G NR) base station, or “gNB” .
  • base station 102 may be connected to a legacy evolved packet core (EPC) network and/or to a NR core (NRC) network.
  • EPC legacy evolved packet core
  • NRC NR core
  • base station 102 may be considered a 5G NR cell and may include one or more transmission and reception points (TRPs) .
  • TRPs transmission and reception points
  • a UE capable of operating according to 5G NR may be connected to one or more TRPs within one or more gNBs.
  • the base station 102 may include at least one antenna 434, and possibly multiple antennas.
  • the antenna (s) 434 may be configured to operate as a wireless transceiver and may be further configured to communicate with UE devices 106 via radio 430.
  • the antenna (s) 434 communicates with the radio 430 via communication chain 432.
  • Communication chain 432 may be a receive chain, a transmit chain or both.
  • the radio 430 may be designed to communicate via various wireless telecommunication standards, including, but not limited to, 5G NR, 5G NR SAT, LTE, LTE-A, GSM, UMTS, CDMA2000, Wi-Fi, etc.
  • the base station 102 may be configured to communicate wirelessly using multiple wireless communication standards.
  • the base station 102 may include multiple radios, which may enable the base station 102 to communicate according to multiple wireless communication technologies.
  • the base station 102 may include an LTE radio for performing communication according to LTE as well as a 5G NR radio for performing communication according to 5G NR.
  • the base station 102 may be capable of operating as both an LTE base station and a 5G NR base station.
  • the base station 102 may include a multi-mode radio which is capable of performing communications according to any of multiple wireless communication technologies (e.g., 5G NR and Wi-Fi, 5G NR SAT and Wi-Fi, LTE and Wi-Fi, LTE and UMTS, LTE and CDMA2000, UMTS and GSM, etc. ) .
  • multiple wireless communication technologies e.g., 5G NR and Wi-Fi, 5G NR SAT and Wi-Fi, LTE and Wi-Fi, LTE and UMTS, LTE and CDMA2000, UMTS and GSM, etc.
  • the BS 102 may include hardware and software components for implementing or supporting implementation of features described herein.
  • the processor 404 of the base station 102 may be configured to implement and/or support implementation of part or all of the methods described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium) .
  • the processor 404 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array) , or as an ASIC (Application Specific Integrated Circuit) , or a combination thereof.
  • base station 102 may be designed as an access point (AP) , in which case network port 470 may be implemented to provide access to a wide area network and/or local area network (s) , e.g., it may include at least one Ethernet port, and radio 430 may be designed to communicate according to the Wi-Fi standard.
  • AP access point
  • network port 470 may be implemented to provide access to a wide area network and/or local area network (s) , e.g., it may include at least one Ethernet port
  • radio 430 may be designed to communicate according to the Wi-Fi standard.
  • processor (s) 404 may include one or more processing elements.
  • processor (s) 404 may include one or more integrated circuits (ICs) that are configured to perform the functions of processor (s) 404.
  • each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc. ) configured to perform the functions of processor (s) 404.
  • radio 430 may include one or more processing elements.
  • radio 430 may include one or more integrated circuits (ICs) that are configured to perform the functions of radio 430.
  • each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc. ) configured to perform the functions of radio 430.
  • a wireless device such as a user equipment, may be configured to perform a variety of tasks that include the use of reference signals (RS) provided by one or more cellular base stations. For example, initial access and beam measurement by a wireless device may be performed based at least in part on synchronization signal blocks (SSBs) provided by one or more cells provided by one or more cellular base stations within communicative range of the wireless device.
  • SSBs synchronization signal blocks
  • Another type of reference signal commonly provided in a cellular communication system may include channel state information (CSI) RS.
  • CSI channel state information
  • CSI-RS may be provided for tracking (e.g., for time and frequency offset tracking) , beam management (e.g., with repetition configured, to assist with determining one or more beams to use for uplink and/or downlink communication) , and/or channel measurement (e.g., CSI-RS configured in a resource set for measuring the quality of the downlink channel and reporting information related to this quality measurement to the base station) , among various possibilities.
  • the UE may periodically perform channel measurements and send channel state information (CSI) to a BS.
  • the base station can then receive and use this channel state information to determine an adjustment of various parameters during communication with the wireless device.
  • the BS may use the received channel state information to adjust the coding of its downlink transmissions to improve downlink channel quality.
  • the base station may transmit some or all such reference signals (or pilot signals) , such as SSB and/or CSI-RS, on a periodic basis.
  • reference signals such as SSB and/or CSI-RS
  • aperiodic reference signals e.g., for aperiodic CSI reporting
  • aperiodic CSI reporting may also or alternatively be provided.
  • the channel state information fed back from the UE based on CSI-RS for CSI acquisition may include one or more of a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , a CSI-RS Resource Indicator (CRI) , a SSBRI (SS/PBCH Resource Block Indicator, and a Layer Indicator (LI) , at least according to some embodiments.
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • RI rank indicator
  • SSBRI SS/PBCH Resource Block Indicator
  • LI Layer Indicator
  • the channel quality information may be provided to the base station for link adaptation, e.g., for providing guidance as to which modulation &coding scheme (MCS) the base station should use when it transmits data. For example, when the downlink channel communication quality between the base station and the UE is determined to be high, the UE may feed back a high CQI value, which may cause the base station to transmit data using a relatively high modulation order and/or a low channel coding rate. As another example, when the downlink channel communication quality between the base station and the UE is determined to be low, the UE may feed back a low CQI value, which may cause the base station to transmit data using a relatively low modulation order and/or a high channel coding rate.
  • MCS modulation &coding scheme
  • PMI feedback may include preferred precoding matrix information, and may be provided to a base station in order to indicate which MIMO precoding scheme the base station should use.
  • the UE may measure the quality of a downlink MIMO channel between the base station and the UE, based on a pilot signal received on the channel, and may recommend, through PMI feedback, which MIMO precoding is desired to be applied by the base station.
  • the PMI configuration is expressed in matrix form, which provides for linear MIMO precoding.
  • the base station and the UE may share a codebook composed of multiple precoding matrixes, where each MIMO precoding matrix in the codebook may have a unique index.
  • the PMI may include an index (or possibly multiple indices) corresponding to the most preferred MIMO precoding matrix (or matrixes) in the codebook. This may enable the UE to minimize the amount of feedback information.
  • the PMI may indicate which precoding matrix from a codebook should be used for transmissions to the UE, at least according to some embodiments.
  • the rank indicator information may indicate a number of transmission layers that the UE determines can be supported by the channel, e.g., when the base station and the UE have multiple antennas, which may enable multi-layer transmission through spatial multiplexing.
  • the RI and the PMI may collectively allow the base station to know which precoding needs to be applied to which layer, e.g., depending on the number of transmission layers.
  • a PMI codebook is defined depending on the number of transmission layers.
  • N number of N t ⁇ R matrixes may be defined (e.g., where R represents the number of layers, N t represents the number of transmitter antenna ports, and N represents the size of the codebook) .
  • the number of transmission layers (R) may conform to a rank value of the precoding matrix (N t ⁇ R matrix) , and hence in this context R may be referred to as the “rank indicator (RI) ” .
  • the channel state information may include an allocated rank (e.g., a rank indicator or RI) .
  • a MIMO-capable UE communicating with a BS may include four receiver chains, e.g., may include four antennas.
  • the BS may also include four or more antennas to enable MIMO communication (e.g., 4 x 4 MIMO) .
  • the UE may be capable of receiving up to four (or more) signals (e.g., layers) from the BS concurrently.
  • Layer to antenna mapping may be applied, e.g., each layer may be mapped to any number of antenna ports (e.g., antennas) .
  • Each antenna port may send and/or receive information associated with one or more layers.
  • the rank may include multiple bits and may indicate the number of signals that the BS may send to the UE in an upcoming time period (e.g., during an upcoming transmission time interval or TTI) .
  • an indication of rank 4 may indicate that the BS will send 4 signals to the UE.
  • the RI may be two bits in length (e.g., since two bits are sufficient to distinguish 4 different rank values) . Note that other numbers and/or configurations of antennas (e.g., at either or both of the UE or the BS) and/or other numbers of data layers are also possible, according to various embodiments.
  • DCI downlink control information
  • PDCCH physical downlink control channel
  • CORESETs control resource sets
  • SSSs search space sets
  • the DCI can be provided in a single DCI (sDCI) mode, in which communications between multiple TRPs (mTRP) and a wireless device/UE may be scheduled using a single DCI communication (e.g., from just one TRP) , or in a multi-DCI mode, in which each of multiple TRPs can provide DCI communications scheduling their own communications with a wireless device.
  • sDCI single DCI
  • the communications that are scheduled in such a multi-TRP scenario can include data communications (e.g., which may be transmitted using a physical downlink shared channel (PDSCH) and/or a physical uplink shared channel (PUSCH) , and/or aperiodic channel state information reference signal (CSI-RS) transmissions, among various possibilities.
  • aperiodic CSI-RS transmissions can include CSI-RS that are configured for multiple possible purposes, such as for beam management, tracking, or CSI acquisition.
  • Transmission to/from a UE to a TRP may be directed according to a transmission control indication (TCI) state.
  • TCI state may correspond to an uplink and/or downlink beam.
  • a UE may be configured to use one or more TCI states simultaneously.
  • a unified TCI framework was introduced in Rel-17 which may facilitate streamlined multi-beam operation, e.g., for use with frequency range (FR) 2.
  • one TCI indication may apply to multiple channels (e.g., PDSCH, PUSCH, PDCCH, and PUCCH may all be mapped to a single common TCI state) .
  • a UE may always know to use the common TCI state to receive DCI, e.g., on PDCCH.
  • sTRP single-TRP
  • extension of the unified TCI framework that focuses on multi-TRP use cases may be beneficial, e.g., for Rel-18.
  • one objective may be to enhance the unified TCI framework by extending it for multi-TRP (mTRP) use case, e.g., by specifying an extension of Rel-17 unified TCI framework for indication of multiple downlink (DL) and uplink (UL) TCI states focusing on multi-TRP use case.
  • mTRP multi-TRP
  • a UE may be provided with up to two pairs of unified TCI States for two TRPs (e.g., or potentially more pairs for more TRPs) .
  • a TCI state may be DL only, UL only, or joint (e.g., useable for both DL and UL) .
  • any TCI state may be associated with one or more channels. For example, some potential pairs may be as follows:
  • Unified TCI State Pair #1 may consist of ⁇ one DL TCI State X1, one UL TCI State X2> for TRP #1.
  • Unified TCI State Pair #2 may consist of ⁇ one DL TCI State Y1, one UL TCI State Y2> for TRP #2.
  • TRPs may be associated with only a single TCI state. In such a case, the TCI state may be joint, UL, or DL. Thus, some TRPs may be used for only one direction, e.g., under at least some circumstances.
  • One potential issue to be addressed for extending unified TCI framework to mTRP is how to associate the multiple unified TCI states (e.g., two DL TCI States) for control channel (e.g., PDCCH) monitoring and receptions.
  • control channel e.g., PDCCH
  • the UE may not have sufficient information to determine whether to use TCI state X1 or Y1 for receiving PDCCH (e.g., DCI) .
  • PDCCH/DCI may not be scheduled (e.g., by previous PDCCH/DCI)
  • FIG. 5 is a flowchart diagram illustrating a method for performing TCI state mapping and selection for multi-TRP operation in a wireless communication system, at least according to some embodiments.
  • aspects of the method of Figure 5 may allow the UE and network to each determine the same TCI state for the purpose of DCI and/or PDCCH, e.g., so that the UE may monitor and receive the control channel, DCI, and/or PDCCH without monitoring additional TCI states for control channel that will not be used by the network for that purpose.
  • the method of Figure 5 may be useful in sDCI mTRP scenarios, among various possibilities.
  • a wireless device e.g., in conjunction with one or more cellular base stations and/or TRPs, such as a UE 106 and a BS 102 illustrated in and described with respect to various of the Figures herein, or more generally in conjunction with any of the computer circuitry, systems, devices, elements, or components shown in the above Figures, among others, as desired.
  • a processor (and/or other hardware) of such a device may be configured to cause the device to perform any combination of the illustrated method elements and/or other method elements.
  • the wireless device may establish a wireless link with a cellular network (502) , according to some embodiments.
  • the wireless link may include a cellular link according to 5G NR.
  • the UE may establish a session with an AMF entity of the cellular network by way of one or more base stations (e.g., TRPs and/or gNBs) that provide radio access to the cellular network.
  • the wireless link may include a cellular link according to LTE.
  • Other types of cellular links are also possible, and the cellular network may also or alternatively operate according to another cellular communication technology (e.g., UMTS, CDMA2000, GSM, etc. ) , according to various embodiments.
  • Establishing the wireless link may include establishing a radio resource control (RRC) connection with a serving cellular base station, at least according to some embodiments.
  • Establishing the RRC connection may include configuring various parameters for communication between the UE and the cellular base station, establishing context information for the UE, and/or any of various other possible features, e.g., relating to establishing an air interface for the UE to perform cellular communication with a cellular network associated with the cellular base station.
  • the UE may operate in a RRC connected state.
  • the RRC connection may also be released (e.g., after a certain period of inactivity with respect to data communication) , in which case the UE may operate in a RRC idle state or a RRC inactive state.
  • the UE may perform handover (e.g., while in RRC connected mode) or cell re-selection (e.g., while in RRC idle or RRC inactive mode) to a new serving cell, e.g., due to UE mobility, changing wireless medium conditions, and/or for any of various other possible reasons.
  • the UE may establish multiple wireless links, e.g., with multiple TRPs of the cellular network, according to a multi-TRP configuration.
  • the UE may be configured (e.g., via RRC signaling) with one or more TCIs, e.g., which may correspond to various beams that can be used to communicate with the TRPs.
  • one or more configured TCI states may be activated (e.g., by RRC, media access control (MAC) control element (CE) , and/or DCI signaling) for the UE at a particular time.
  • MAC media access control
  • CE control element
  • DCI signaling e.g., DCI signaling
  • the wireless links may be associated with corresponding control resource set (s) (CORESETs) and/or search space set (s) (SSSs) , according to some embodiments.
  • CORESETs control resource set
  • SSSs search space set
  • a first TCI state may be associated with a first CORESET and/or SSS, among various possibilities.
  • establishing the wireless link (s) may include the UE providing capability information for the UE.
  • capability information may include information relating to any of a variety of types of UE capabilities.
  • establishing the wireless link (s) may include the UE exchanging configuration information with the network.
  • the configuration information may include information related to selection of a TCI state (from a plurality of active TCI states) for the UE to use to monitor/receive control channel (e.g., PDCCH and/or DCI) .
  • the network may provide one or more rules for the UE to use to select such a TCI state.
  • such a rule or rules may be pre-configured at the UE and at the network (e.g., included in a wireless standard that the UE implements) , and thus may not be indicated as part of establishing the link (s) .
  • the configuration information may include an indication of one or more CORESETs and/or SSSs for the UE.
  • the UE may be configured to use any number of CORESETs and/or any number of SSSs.
  • the various CORESETs and/or SSSs may be configured differently.
  • different CORESETs and/or SSSs may be associated with different rules for selecting a TCI state for monitoring control channel.
  • different CORESETs and/or SSSs may be configured to use different approaches (e.g., of the various approaches discussed further below) for selecting a TCI state for monitoring control channel (e.g., PDCCH) .
  • the configuration information may include an indication of a division of a plurality of SSSs and/or CORESETs into two or more pools.
  • the network may indicate that one group of SSSs will be considered a first pool and a second group of SSSs may be considered a second pool.
  • the network may indicate that one group of CORESETs will be considered a first pool and a second group of CORESETs may be considered a second pool.
  • multiple SSSs (or CORESETs) may be grouped/divided into multiple pools of SSSs (or CORESETs) .
  • the configuration information may be exchanged via RRC, among various possibilities.
  • the network may select (e.g., activate) a plurality of TCI states for the UE (503) , according to some embodiments.
  • the TCI states may be selected based on the current location of the UE, motion of the UE, channel conditions, and/or other factors.
  • the group of TCI states may include two or more unified TCI state pairs, e.g., corresponding to one, two or even more TRPs.
  • the plurality of active TCI states may, in at least some cases, include more than one TCI state that may be used for DL communication. In other words, two or more active TCI states may be DL only and/or joint DL and UL.
  • the network may indicate the plurality of active TCI states to the UE (504) , according to some embodiments.
  • the network may transmit an (e.g., unified) indication (or indications) of a group of TCI states to the UE.
  • the network may indicate the plurality of active TCI states to the UE using any type (or combination of types) of signaling.
  • the network may use RRC, MAC, and/or DCI signaling/messages to activate the TCI states.
  • the indication may be transmitted as a single message or a combination of multiple messages.
  • the UE may receive the indication (s) of the active TCI states.
  • the UE may or may not respond to, acknowledge, or otherwise transmit information to the network about the activation.
  • the UE may transmit one or more suggested TCI states and/or information about TCI states.
  • FIG. 6 illustrates an example, in which UE 106 is configured with TCI state 0 from TRP #1 and TCI state 3 from TRP #2, according to some embodiments.
  • TCI state 0 from TRP #1
  • TCI state 3 from TRP #2
  • Each of these TCI states may be useable for DL communication.
  • the active TCI state (s) may be updated. For example, when UE 106 moves completely into 604 (and no longer is in 602) , the TCI state (s) associated with TRP #1 may be deactivated and one or more TCI states associated with TRP #2 (e.g., which may be different than TCI state 3) may be activated.
  • the network may select a TCI state for transmission of control channel messages to the UE (505) , according to some embodiments.
  • the selected TCI state may be one of the plurality of active states.
  • the selected TCI state may be a DL or joint TCI state.
  • the UE may select a TCI state to use for monitoring and reception of a control channel (506) , according to some embodiments.
  • the UE may select a single TCI state (e.g., of the plurality of active TCI states indicated in 504, which may include multiple DL and/or joint TCI states) to monitor for PDCCH and/or DCI.
  • the UE may select different TCI states (e.g., of the plurality of active TCI states indicated in 504) to monitor for control channel associated with different CORESETs and/or SSSs.
  • different TCI states e.g., of the plurality of active TCI states indicated in 504
  • TCI state for control channel may be used as further explained below. These approaches may include use of one of more rules, semi-static configuration, and/or dynamic signaling, among various possibilities.
  • One approach may be to use implicit mapping, e.g., based on one or more rule encoded in a specification such as a wireless standard.
  • the DL or joint TCI state with a smallest identifier (ID) e.g., a TCI state ID
  • the DL or joint TCI state with a smallest identifier (ID) within the plurality of active TCI states may be selected for control channel monitoring and reception.
  • ID e.g., a TCI state ID
  • a rule may be based on a ranking or other characteristic (s) of the TCI state IDs of the DL or joint TCI states.
  • a rule may be configured such that the highest ID or median ID may be selected, among various possibilities.
  • the DL or joint TCI state with quasi-colocated (QCL) source RS on a serving cell may be selected for control channel monitoring and reception.
  • the rule may be to select a DL or joint TCI state associated with a serving cell, if such a TCI state is available. If the QCL source RS of multiple activated DL or joint TCI states are on the serving cell or if no activated DL or joint TCI state have source RS with QCL on the non-serving cell, a TCI state may be selected based on ranking of TCI state IDs (e.g., a TCI state with a smallest ID may be selected) .
  • FIG. 7 provides one example of implicit TCI state determination/selection for control channel monitoring and reception, according to some embodiments.
  • TCI states #1 and #3 may be activated for DL or joint communication.
  • the TCI State #1 with QCL source RS on a serving cell may be selected for control channel monitoring and reception (e.g., according to a rule to select a TCI state associated with the serving cell) , according to some embodiments.
  • TCI state #1 may be selected based on a rule to select a DL or joint TCI state with a lowest ID (e.g., note that in this example, TCI state #0 may not be activated (e.g., at all, or for DL use) ) .
  • Another approach may be an explicit indication of one of the plurality of activated TCI states, according to some embodiments.
  • an explicit indication may be an RRC-based association of an activated TCI state for control channel monitoring and reception in sDCI mTRP use case.
  • RRC Radio Resource Control
  • such an explicit indication may be transmitted by the network and received by the UE at any time.
  • such an explicit indication may be transmitted during 502 (e.g., in association with establishing, updating, or reconfiguring a wireless link) , during 504 (e.g., in association with activating TCI states or changing which TCI states are active) , and/or at any other time (e.g., such an explicit indication may be replaced, refreshed, or updated periodically or as needed) .
  • the UE may receive such an explicit indication and may select a (e.g., potentially new/changed) TCI state (or states) for control channel monitoring and reception in response to receiving the indication.
  • the indication may be transmitted with an indication of when or under what condition the TCI state should be updated.
  • the indication may be provided a certain amount of time in advance of when the TCI state should be updated (e.g., when the UE and network should start to apply the TCI state) .
  • a UE may be explicitly configured (e.g., by RRC or other higher layer) to associate one of the active TCI states with PDCCH/DCI reception.
  • Figure 8 illustrates an example information element (IE) as may be used to indicate one TCI state of a plurality of active TCI states, according to some embodiments.
  • IE information element
  • a CORESET may be identified by its ID and a unified TCI index (e.g., UnifiedTCIIndex-R18) field may be used to indicate the TCI state to be used for control channel monitoring and reception.
  • a unified TCI index e.g., UnifiedTCIIndex-R18
  • the unified TCI index field may indicate the index of the unified TCI state for this CORESET, e.g., as specified in TS 38.213 (e.g., clauses 9 and 10) and TS 38.214 (e.g., clauses 5.1 and 6.1) .
  • the unified TCI index field may use an index of the active DL or joint TCI states to indicate which one of the active states is used for control channel monitoring and reception.
  • the UE may apply a default value (e.g., 0) .
  • the unified TCI index may be 0 or 1 (e.g., as shown in Figure 8) .
  • the unified TCI index may be more than 1 bit and may have a larger maximum value.
  • a UE may be explicitly configured (e.g., by RRC or other higher layer) to associate one of the active TCI states with control channel monitoring and reception.
  • Figure 9 illustrates an example IE as may be used to indicate one TCI state of a plurality of active TCI states, according to some embodiments.
  • a SSS may be identified by its ID and a unified TCI index field may be used to indicate the TCI state to be used for control channel monitoring and reception.
  • a CORESET may also be identified.
  • the unified TCI index field may indicate the index of the unified TCI state for this SSS, e.g., as specified in TS 38.213 (e.g., clauses 9 and 10) and TS 38.214 (e.g., clauses 5.1 and 6.1) .
  • the unified TCI index field may use an index of the active DL or joint TCI states to indicate which one of the active states is used for PDCCH.
  • the UE may apply a default value (e.g., 0) .
  • the unified TCI index may be 0 or 1 (e.g., as shown in Figure 9) .
  • the unified TCI index may have a larger maximum value.
  • the CSI-RS associated with the Rel-17 indicated TCI may be QCL with an SSB associated with the serving cell physical cell ID (PCI) that may be used to indicate the physical layer identity of the serving cell.
  • PCI serving cell physical cell ID
  • Figures 8 and 9 provide some examples of abstract syntax notation one (ASN. 1) code to implement these two options of higher layer (e.g., RRC) signaling for an explicit indication.
  • ASN. 1 abstract syntax notation one
  • a new IE ‘UnifiedTCIIndex-r18’ may be added into the CORESET configuration or SSS configuration to explicitly configure the TCI state for PDCCH from the activated unified DL and/or joint TCI state.
  • the activated TCI states may be indexed in order of their IDs. Thus, a value of ‘0’ may correspond to the smallest TCI state ID and a value of ‘1’ corresponds to the next larger TCI state ID, etc.
  • semi-static signaling may be used to explicitly indicate a TCI state (e.g., of a plurality of active DL or joint TCI states) for control channel monitoring and reception.
  • a TCI state e.g., of a plurality of active DL or joint TCI states
  • media access control (MAC) control element (MAC-CE) based association may be used for control channel monitoring and reception, e.g., in an sDCI mTRP use case.
  • a new MAC-CE may be used to indicate a TCI state for control channel monitoring and reception.
  • the MAC-CE may be identified by a MAC subheader with a dedicated logical channel ID (LCID) .
  • the LCID may be encoded in a specification (e.g., a 3GPP standard) .
  • a CORESET-dedicated or SSS-dedicated MAC-CE may be used to indicate the TCI to the UE.
  • This (e.g., new) MAC-CE may have a fixed size of two octets (e.g., 16 bits) and may include some or all of the following fields:
  • This field may indicate the identity of the serving cell for which the MAC-CE applies.
  • CORESET ID This field may indicate a CORESET for which the TCI state is indicated.
  • SSS ID This field may indicate an SSS for which the TCI state is being indicated.
  • Unified TCI Index indicates the index of an activated TCI state for use for monitoring PDCCH/DCI according to this MAC-CE.
  • the unified TCI index field may be configured as discussed above with respect to Figures 8 and 9.
  • Figures 10 and 11 depict example MAC-CE structures of the (e.g., new) MAC-CE that may be used to indicate the TCI state for control channel monitoring and reception, according to some embodiments.
  • the network may indicate a TCI state for a CORESET (e.g., using Figure 10) or for a SSS (e.g., using Figure 11) .
  • These MAC-CE may include a serving cell ID, ID of the CORESET or SSS, a number of reserved bits (R, in the figures) , and the unified TCI index. It will be appreciated that alternative designs of the MAC-CE may be used as desired.
  • a UE may select the indicated TCI state (e.g., for the CORESET or SSS) for use for control channel monitoring and reception. It will be appreciated that such an indication may be treated in a semi-static manner, e.g., to remain in effect until changed. Further, the network may indicate different TCI states for any number of different CORESETs and/or SSSs by transmitting corresponding MAC-CEs for each CORESET or SSS, according to some embodiments.
  • MAC signaling may be used to explicitly indicate a TCI state for control channel monitoring and reception for more than one CORESET or more than one SSS.
  • a CORESET-common or SSS-common MAC-CE may be used to indicate TCI state association for control channel monitoring and reception.
  • the (e.g., new) MAC-CE may have a fixed size of three octets (e.g., 24 bits) for COREST-common MAC-CE and a fixed size of six octets (e.g., 48 bits) for SSS-common MAC-CE, according to some embodiments.
  • Such a MAC-CE may include fields as depicted in Figures 12 or 13, according to some embodiments.
  • the serving cell ID and unified TCI index fields may be as described above with respect to other examples.
  • the fields C0, C1, C2, etc. may indicate the CORESETs or SSSs for which the indicated TCI (e.g., by the unified TCI index field) should be applied.
  • the MAC-CE may include a bitmap of any number of SSSs or CORESETs. The bitmap may indicate which of the SSSs or CORESETs use the indicated TCI state for control channel monitoring and reception.
  • the value of ‘1’ may be set to indicate to apply the TCI state for the corresponding CORESET or SSS and the value of ‘0’ may indicate that the TCI state is not to be applied for the corresponding CORESET or SSS.
  • the ‘0’ value may indicate that the UE should continue using a previously set TCI state.
  • the bitmap may indicate which SSSs or CORESETs may be updated.
  • a value ‘0’ may indicate that the UE should use a default TCI state.
  • Figure 12 may indicate the MAC-CE structure in a CORESET based implementation, according to some embodiments.
  • Figure 13 may indicate the MAC-CE structure in a SSS based implementation, according to some embodiments.
  • a UE may select the indicated TCI state (e.g., for the CORESETs or SSSs) for use for control channel monitoring and reception. It will be appreciated that such an indication may be treated in a semi-static manner, e.g., to remain in effect until changed. Further, the network may indicate different TCI states for any number of different CORESETs and/or SSSs by transmitting corresponding MAC-CEs for different TCI states and using the bitmaps to indicate which CORESETs or SSSs for the different TCI states, according to some embodiments.
  • a MAC-CE that indicates multiple TCI states may include multiple bitmaps (e.g., associated with the different TCI index fields) .
  • Such a MAC-CE may allow for indications of different TCI states for different groups of CORESETs or SSSs in a single MAC-CE.
  • DCI dynamic signaling
  • a DCI format may be modified for this purpose.
  • the Rel-17 DCI format 1_1 or 1_2 that includes a unified TCI state indication (and does not schedule data) is shown in Figure 14, according to some embodiments.
  • This DCI format may be modified to signal which TCI state should be used for control channel monitoring and reception by repurposing some of the reserved fields as “CORESET indication” or ‘SSS indication” fields as shown in Figure 15 and Figure 16, respectively.
  • These DCI messages may be used to associate the TCI state (e.g., for control channel monitoring and reception) for each CORESET or each search space set, respectively.
  • the TCI field may identify one or more TCI states, e.g., by the corresponding TCI state index (indices) or TCI state ID.
  • the TCI field may indicate a pair of TCI states.
  • the CORESET indication field may be fixed to be 12 bits or variable size depending on the number of CORESET configured (e.g., by RRC signaling in 502) , according to some embodiments.
  • the SSS indication field may be fixed to be 40 bits or variable size depending on the number of SSSs configured (e.g., by RRC signaling in 502) , according to some embodiments. Note that different fixed sizes (e.g., other than 12 or 40 bits) may be used as desired.
  • Both the CORESET indication and SSS indication field may be a form of bitmap signaling. Thus, each bit in the bitmap may correspond to a CORESET or SSS.
  • the bitmap values may be interpreted according to any of various rules.
  • a value of ‘1’ may indicate that the corresponding CORESET or SSS is associated with the smallest TCI state index of the TCI states indicated by the TCI field.
  • the value ‘0’ may indicate the highest TCI state index. It will be appreciated that the values may be reversed as desired.
  • a value of ‘1’ may indicate that the corresponding CORESET or SSS is updated to be associated with the (e.g., single/only) TCI state indicated by the TCI field.
  • the value ‘0’ may indicate that it is not updated.
  • a value ‘0’ may indicate that the UE should use a default TCI state. It will be appreciated that the values may be reversed as desired.
  • rules may be used as desired. For example, rules discussed above with respect to implicit mapping may be used in association with DCI signaling.
  • the Rel-17 DCI format 1_1 or 1_2 that includes a unified TCI state indication (and does schedule data) may be modified to signal which TCI state should be used for control channel monitoring and reception by adding the “CORESET indication” or ‘SSS indication” fields as shown in Figure 17 and Figure 18, respectively.
  • the TCI, CORESET, and SSS fields may be interpreted as discussed above with respect to the examples of DCI that do not schedule data.
  • a two-step signaling approach may be used, according to some embodiments.
  • Figure 19 illustrates an example of the two-step signaling, according to some embodiments.
  • a group of CORESETs or SSSs may be first divided into two or more pools by configuration information (e.g., RRC signaling, etc. during 502) .
  • they may be divided into pool #1 (1902) of CORESETs or SSSs and pool #2 (1904) of CORESETs or SSSs.
  • TCI selection fields (1910, 1912) maybe transmitted in DCI to indicate which TCI state should be applied (e.g., for control channel monitoring) for the different pools.
  • field 1910 may apply to pool #1 and field 1912 may apply to pool #2.
  • such fields may be added to DCI format 1_1 and/or 1_2 (e.g., in addition to CRC 1908 and other existing fields of the DCI according to Rel. 17 1906) .
  • a TCI selection field may be 1 bit, among various possibilities.
  • a first TCI selection field may be applied for the first CORESET or SSS pool, a second TCI selection field may be applied for the second CORESET or SSS pool.
  • the TCI selection fields may use any of various rules to indicate which of the configured DL or joint TCI states (e.g., as indicated in 504) may be applied to the corresponding pool. For example, any of the rules discussed elsewhere herein may be applied, as desired.
  • a value of ‘0’ in a TCI selection field may indicate to apply the TCI state with a smallest ID to the corresponding pool and a value of ‘1’ may indicate to apply the TCI state with a largest ID for the corresponding pool.
  • a value of ‘0’ in a TCI selection field may indicate to apply a default TCI state or not to update the current TCI state for the corresponding pool and a value of ‘1’ may indicate to update the TCI state for the corresponding pool.
  • a particular TCI state may be indicated (e.g., directly by ID or indirectly according to some rule) for the update elsewhere in the same DCI message (e.g., in a TCI state field (not shown) ) or in a different message.
  • the TCI selection field may indicate an index of a TCI state within the set of active DL or joint TCI states, e.g., indicating that the TCI state with that index should be selected for the pool corresponding to the TCI selection field.
  • the indicated TCI state (s) may be (e.g., by default) may be applied as soon as possible.
  • the UE and network may apply the indicate state (s) at a next control channel opportunity (e.g., for an active CORESET and/or SSS) .
  • the indicated state (s) may be used to transmit/receive/monitor PDCCH at a next subsequent window of PDCCH.
  • the DCI may include a further field to indicate a delay for applying the indicated TCI state (s) .
  • FIG 19 further illustrates how the second step of this two-step signaling may be applied to a UE moving between the coverage areas of two TRPs over times t0 to t3, according to some embodiments.
  • two DL TCI states (e.g., TCI #1 and TCI #3) may have been activated by network before time instance ‘t0’ .
  • the network may transmit a DCI to the UE and each DCI may include two TCI selection fields 1910 and 1912.
  • the shaded bars may represent DCI messages transmitted to the UE at the indicated time instances.
  • the DCI messages may use different DCI formats.
  • the value of the TCI selection fields 1910 and 1912 in the different DCIs may change as shown in the table.
  • the UE may select the activated TCI with the smallest ID (e.g., TCI #1 is the smallest of TCI#1 and #3) for both CORESET pool or SSS pool and therefore may operate in a sDCI sTRP mode at times t0 and t1 with TRP#1.
  • the smallest ID e.g., TCI #1 is the smallest of TCI#1 and #3
  • the network may trigger the UE to monitor SSS pool #1 from TRP#1 and SSS pool #2 from TRP#2 such that seamless handover is achieved.
  • the network may set the TCI selection field 1910 with a value of ‘0’ and TCI selection field 1912 with a value of ‘1’ in DCI transmitted in time instance ‘t2’ .
  • the UE may use TCI state with the smallest ID (e.g., TCI #1) for the SSS pool 1902 and use the TCI state with the largest ID (e.g., TCI #3) for the SSS pool 1904 to monitor PDCCH.
  • the network may transmit a DCI with both TCI selection field 1910 and 1912 to be ‘1’ and therefore the TCI state with the largest ID (e.g., TCI #3) may be applied for both SSS pools. Consequently, the UE may operate in a sDCI sTRP mode starting from time t3 with TRP#2.
  • the UE may select the indicated TCI state for each pool (e.g., according to 1910 for pool #1, according to 1912 for pool #2) for monitoring control channel. For example, between times t2 and t3, the UE may select TCI state 1 to monitor for control channel of SSS Pool #1 1902 based on the value ‘0’ of field 1910 and additionally select TCI state 3 to monitor for control channel of SSS Pool #2 1904 based on the value ‘1’ of field 1912 in the DCI received at time t2.
  • Figure 19 depicts an example with 2 SSS pools and 2 corresponding TCI selection fields
  • any number of SSS or CORESET pools (and correspondingly, an equal number of TCI selection fields) may be used as desired.
  • the TCI selection fields may be illustrated as 1-bit each. However, longer TCI selection fields may be used as desired.
  • one DCI may be used to update the TCI state that the UE may monitor for subsequent DCI.
  • the UE may monitor the selected TCI state for control channel transmissions from the network (507) , according to some embodiments. For example, the UE may tune receive circuitry according to the selected TCI state for control channel reception at times/frequencies associated with PDCCH, e.g., for an active SSS and/or CORESET. Thus, the UE may be ready to receive DCI and/or other control channel messages according to the selected TCI state.
  • the network may transmit control channel information to the UE according to the selected TCI state (508) , according to some embodiments. It will be appreciated that the network may also determine (e.g., according to the various rules and methods discussed with respect to 506) what TCI state the UE may monitor for control channel transmissions. Thus, the network may use the selected TCI state for transmission of the control channel. For example, the network may transmit one or more DCI messages to the UE on PDCCH using the selected TCI state.
  • the UE and the network may communicate according to the control channel (510) , according to some embodiments.
  • the control channel may include a DCI scheduling uplink and/or downlink data.
  • the DCI may indicate a TCI state (or multiple states) for the data.
  • the TCI state (s) for the data may be the same or different than the selected TCI state (e.g., for control channel monitoring) .
  • the UE and network may exchange the data using the TCI state (s) indicated for the data according to the channel.
  • the UE may continue to monitor the selected TCI state for further control channel transmissions, according to some embodiments. For example, the UE may periodically tune to the selected TCI state (e.g., at time/frequency locations associated with control channel for a relevant SSS and/or CORESET)
  • the method of Figure 5 may be used to provide a framework according to which a UE and network may select a TCI state (e.g., of multiple active TCI states which may be associated with multiple TRPs) for control channel monitoring and reception, and thus to assist the network to effectively and efficiently schedule and perform wireless communications with the UE, at least in some instances.
  • a TCI state e.g., of multiple active TCI states which may be associated with multiple TRPs
  • 502-506 may occur in any order and/or at the same or overlapping times.
  • 505 may occur at the same time as 503; then an indication of the plurality of states (e.g., 504) may occur along with an indication of any rule or further signaling (e.g., MAC-CE, DCI, etc. ) as discussed further below with respect to 506.
  • 503-505 may occur as part of 502 or at any later time (s) .
  • any of these steps may be repeated any number of times (e.g., as a UE moves, etc. ) .
  • Any or all of 502-504 may not be repeated as often as 505-510, according to some embodiments.
  • the plurality of active TCI states may be updated (e.g., 503, 504) less frequently than the TCI state for control channel monitoring (e.g., 505 -507) , according to some embodiments.
  • One set of embodiments may include a method, by a user equipment (UE) .
  • the method may include establishing communication with a cellular network via a plurality of transmission and reception points (TRPs) ; receiving, from the cellular network, an indication of a plurality of transmission control indication (TCI) states for downlink communication from the plurality of TRPs; selecting, according to a first rule, a TCI state of the plurality of TCI states for monitoring of control channel messages from the cellular network via the plurality of TRPs; monitoring for the control channel messages using the selected TCI state; receiving, from the cellular network via at least one TRP of the plurality of TRPs, a first control channel message using the selected TCI state; and exchanging data, with the cellular network, according to the first control channel message.
  • TRPs transmission and reception points
  • the method may further comprise determining respective TCI identifiers for respective TCI states of the plurality of TCI states.
  • the first rule comprises: selecting the TCI state with a lowest TCI identifier.
  • the method may further comprise determining whether respective TCI states of the plurality of TCI states are associated with a serving cell.
  • the first rule comprises: in response to determining that exactly one TCI state of the plurality of TCI states is associated with the serving cell, selecting the exactly one TCI state that is associated with the serving cell as the selected TCI state.
  • the first rule comprises: in response to determining that no TCI state of the plurality of TCI states is associated with the serving cell, selecting the TCI state of the plurality of TCI states with a lowest TCI identifier.
  • the first rule comprises: in response to determining that multiple TCI states of the plurality of TCI states are associated with the serving cell, selecting the TCI state with a lowest TCI identifier of the multiple TCI states associated with the serving cell.
  • One set of embodiments may include a method, by a user equipment (UE) .
  • the method may include establishing communication with a cellular network via a plurality of transmission and reception points (TRPs) ; receiving, from the cellular network, an indication of a rule for selecting a transmission control indication (TCI) state from a generic plurality of TCI states for downlink communication from the plurality of TRPs; receiving, from the cellular network, an indication of an activated plurality of unified TCI states for downlink communication from the plurality of TRPs; selecting, based on the rule, a TCI state for control channel monitoring from the activated plurality of TCI states; monitoring a control channel using the selected TCI state; receiving, from at least one TRP of the plurality of TRPs and using the selected TCI state, a control channel message; and exchanging data with the cellular network according to the control channel message.
  • TRPs transmission and reception points
  • the indication of the rule is received via radio resource control (RRC) signaling.
  • RRC radio resource control
  • the RRC signaling includes a unified TCI index field.
  • a first possible value of the unified TCI index field indicates that the rule is to select the TCI state with a highest TCI index of the activated plurality of TCI states.
  • a second possible value of the unified TCI index field indicates that the rule is to select the TCI state with a lowest TCI index of the activated plurality of TCI states.
  • the indication of the rule comprises a configuration of one of: a control resource set (CORESET) ; or a search space set.
  • CORESET control resource set
  • One set of embodiments may include a method, by a user equipment (UE) .
  • the method may include establishing communication with a cellular network via a plurality of transmission and reception points (TRPs) ; receiving, from the cellular network, an indication of a plurality of transmission control indication (TCI) states activated for downlink communication from the plurality of TRPs; receiving, from the cellular network, a media access control (MAC) control element (MAC-CE) comprising an index of a first TCI state of the plurality of TCI states; selecting, based on the index, the first TCI state for monitoring of control channel messages from the plurality of TRPs; monitoring a control channel for control channel messages according to the first TCI state; receiving, from at least one TRP of the plurality of TRPs and using the first TCI state, a first control channel message; and exchanging data with the cellular network according to the first control channel message.
  • TRPs transmission and reception points
  • the MAC-CE has a fixed size and is identified by a MAC sub-header with a dedicated Logical Channel identifier (LCID) .
  • LCID Logical Channel identifier
  • said exchanging data with the cellular network according to the first control channel message comprises receiving data using at least two TCI states of the plurality of TCI states.
  • the MAC-CE is specific to a first control resource set (CORESET) .
  • the MAC-CE is specific to a first search space set (SSS) .
  • SSS search space set
  • the MAC-CE is common to a plurality of control resource sets (CORESETs) and includes a bitmap indicating for which of the plurality of CORESETs the index of the first TCI state is applied.
  • CORESETs control resource sets
  • the MAC-CE is common to a plurality of search space sets (SSSs) and includes a bitmap indicating for which of the plurality of SSSs the index of the first TCI state is applied.
  • SSSs search space sets
  • the MAC-CE comprises an identifier of a serving cell for which the index of the first TCI state applies.
  • control channel comprises a physical downlink control channel (PDCCH) .
  • PDCCH physical downlink control channel
  • the first control channel message comprises a downlink control information (DCI) message.
  • DCI downlink control information
  • the plurality of TCI states comprises exactly two TCI states and the index is indicated in a 1-bit unified TCI index field of the MAC-CE.
  • the plurality of TCI states comprises more than two TCI states and the index is indicated in a unified TCI index field comprising more than one bit of the MAC-CE.
  • One set of embodiments may include a method, by a user equipment (UE) .
  • the method may include establishing communication with a cellular network via a plurality of transmission and reception points (TRPs) ; receiving, from the cellular network, an indication of a plurality of transmission control indication (TCI) states activated for downlink communication from the plurality of TRPs; receiving, from the cellular network, a first downlink control information (DCI) message comprising an indication of a first TCI state of the plurality of TCI states; selecting, based on the indication, the first TCI state for monitoring for further DCI; monitoring for further DCI using the first TCI state; receiving, during said monitoring, a second DCI message; receiving, from at least one TRP of the plurality of TRPs and using the first TCI state, the second DCI message; and exchanging data with the cellular network according to the second DCI message.
  • TRPs transmission and reception points
  • the first DCI message comprises an indication of one or more control resource set (CORESET) to which the first TCI state is to be applied.
  • CORESET control resource set
  • the first DCI message comprises a DCI format 1_1 or 1_2 that does not schedule data and the indication of the one or more CORESET is included in place of a reserved field relative to 3GPP release 17.
  • the first DCI message comprises a DCI format 1_1 or 1_2 that does schedule data and the indication of the one or more CORESET is included as an additional field relative to 3GPP release 17.
  • the first DCI message comprises an indication of one or more search space set (SSS) to which the first TCI state is to be applied.
  • SSS search space set
  • the first DCI message comprises a DCI format 1_1 or 1_2 that does not schedule data and the indication of the one or more SSS is included in place of a reserved field relative to 3GPP release 17.
  • the first DCI message comprises a DCI format 1_1 or 1_2 that does schedule data and the indication of the one or more SSS is included as an additional field relative to 3GPP release 17.
  • CORESETs control resource sets
  • SSSs search space sets
  • the first DCI message indicates that the first TCI state is associated with the first pool.
  • said selecting the first TCI state is further based on determining that a CORESET or SSS of the first pool is active.
  • the first DCI message further comprises an indication of a second TCI state of the plurality of TCI states and further indicates that the second TCI state is associated with the second pool.
  • the first DCI message indicates that the first TCI state is associated with the first pool via a 1 bit indication to apply a TCI state with a lowest TCI index value of the plurality of TCI states.
  • the first DCI message indicates that the first TCI state is associated with the first pool via a 1 bit indication to apply a TCI state with a highest TCI index value of the plurality of TCI states.
  • a method, at a cellular network may comprise: establishing communication with a user equipment (UE) via a plurality of transmission and reception points (TRPs) ; transmitting, to the UE, an indication of a plurality of transmission control indication (TCI) states for downlink communication from the plurality of TRPs; selecting, according to a first rule, a TCI state of the plurality of TCI states for control channel messages from the cellular network to the UE via the plurality of TRPs; transmitting, to the UE via at least one TRP of the plurality of TRPs, a first control channel message using the selected TCI state; and exchanging data, with the UE, according to the first control channel message.
  • TCI transmission control indication
  • the first rule is specified by a 3GPP wireless standard.
  • the first control channel message comprises a downlink control information (DCI) message transmitted on a physical downlink control channel (PDCCH) .
  • DCI downlink control information
  • PDCCH physical downlink control channel
  • a method, at a cellular network may comprise: establishing communication with a user equipment (UE) via a plurality of transmission and reception points (TRPs) ; transmitting, to the UE, an indication of a plurality of transmission control indication (TCI) states activated for downlink communication via the plurality of TRPs; selecting, a first TCI state of the plurality of TCI states for transmission of control channel messages to the UE; transmitting, to the UE, a media access control (MAC) control element (MAC-CE) comprising an index of the first TCI state; transmitting, to the UE and using the first TCI state, a first control channel message; and exchanging data with the UE according to the first control channel message.
  • TCI transmission control indication
  • the MAC-CE has a fixed size and is identified by a MAC sub-header with a dedicated Logical Channel identifier (LCID) .
  • LCID Logical Channel identifier
  • said exchanging data with the UE according to the first control channel message comprises: transmitting data using at least two TCI states of the plurality of TCI states.
  • the MAC-CE is specific to a first control resource set (CORESET) .
  • the MAC-CE is specific to a first search space set (SSS) .
  • the MAC-CE is common to a plurality of control resource sets (CORESETs) and includes a bitmap indicating for which of the plurality of CORESETs the index of the first TCI state is applied.
  • CORESETs control resource sets
  • the MAC-CE is common to a plurality of search space sets (SSSs) and includes a bitmap indicating for which of the plurality of SSSs the index of the first TCI state is applied.
  • SSSs search space sets
  • the MAC-CE comprises an identifier of a serving cell for which the index of the first TCI state applies.
  • a method, at a cellular network may comprise: establishing communication with a user equipment (UE) via a plurality of transmission and reception points (TRPs) ; transmitting, to the UE, an indication of a plurality of transmission control indication (TCI) states activated for downlink communication from the plurality of TRPs; selecting a first TCI state of the plurality of TCI states for transmission of a second downlink control information (DCI) message to the UE; transmitting, to the UE, a first DCI message comprising an indication of the first TCI state; transmitting, to the UE using the first TCI state, the second DCI message; and exchanging data with the UE according to the second DCI message.
  • TCI transmission control indication
  • DCI downlink control information
  • the first DCI message comprises an indication of: one or more control resource set (CORESET) or to which the first TCI state is to be applied; or one or more search space set (SSS) to which the first TCI state is to be applied.
  • CORESET control resource set
  • SSS search space set
  • the first DCI message comprises a DCI format 1_1 or 1_2.
  • CORESETs control resource sets
  • SSSs search space sets
  • control channel may be a PDCCH, among various possibilities.
  • a control channel message may be a downlink control information (DCI) message.
  • the DCI message (s) may be of any DCI format (s) .
  • a TCI state may be a unified TCI state.
  • a further exemplary embodiment may include a method, comprising: performing, by a wireless device, any or all parts of the preceding examples.
  • Another exemplary embodiment may include a device, comprising: an antenna; a radio coupled to the antenna; and a processing element operably coupled to the radio, wherein the device is configured to implement any or all parts of the preceding examples.
  • a further exemplary set of embodiments may include a non-transitory computer accessible memory medium comprising program instructions which, when executed at a device, cause the device to implement any or all parts of any of the preceding examples.
  • a still further exemplary set of embodiments may include a computer program comprising instructions for performing any or all parts of any of the preceding examples.
  • Yet another exemplary set of embodiments may include an apparatus comprising means for performing any or all of the elements of any of the preceding examples.
  • Still another exemplary set of embodiments may include an apparatus comprising a processing element configured to cause a wireless device to perform any or all of the elements of any of the preceding examples.
  • personally identifiable information should follow privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining the privacy of users.
  • personally identifiable information data should be managed and handled so as to minimize risks of unintentional or unauthorized access or use, and the nature of authorized use should be clearly indicated to users.
  • Any of the methods described herein for operating a user equipment may be the basis of a corresponding method for operating a base station, by interpreting each message/signal X received by the UE in the downlink as message/signal X transmitted by the base station, and each message/signal Y transmitted in the uplink by the UE as a message/signal Y received by the base station.
  • Embodiments of the present disclosure may be realized in any of various forms.
  • the present subject matter may be realized as a computer-implemented method, a computer-readable memory medium, or a computer system.
  • the present subject matter may be realized using one or more custom-designed hardware devices such as ASICs.
  • the present subject matter may be realized using one or more programmable hardware elements such as FPGAs.
  • a non-transitory computer-readable memory medium e.g., a non-transitory memory element
  • a non-transitory computer-readable memory medium may be configured so that it stores program instructions and/or data, where the program instructions, if executed by a computer system, cause the computer system to perform a method, e.g., any of a method embodiments described herein, or, any combination of the method embodiments described herein, or, any subset of any of the method embodiments described herein, or, any combination of such subsets.
  • a device e.g., a UE
  • a device may be configured to include a processor (or a set of processors) and a memory medium (or memory element) , where the memory medium stores program instructions, where the processor is configured to read and execute the program instructions from the memory medium, where the program instructions are executable to implement any of the various method embodiments described herein (or, any combination of the method embodiments described herein, or, any subset of any of the method embodiments described herein, or, any combination of such subsets) .
  • the device may be realized in any of various forms.

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Abstract

La présente divulgation concerne des techniques pour effectuer une opération de point d'émission et de réception multiple dans un système de communication sans fil. Un état d'indication de commande de transmission peut être indiqué pour une surveillance future d'un canal de commande, par exemple, à l'aide d'une signalisation semi-statique. L'état indiqué peut être utilisé pour fournir et recevoir des informations de commande pour effectuer une opération de point d'émission et de réception multiple.
PCT/CN2022/109354 2022-08-01 2022-08-01 Mappage semi-statique d'états de transmission unifiés pour la réception de canal de commande à points multiples WO2024026599A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021217627A1 (fr) * 2020-04-30 2021-11-04 Qualcomm Incorporated Activation de multiples états d'indicateur tci pour un canal pdcch et un canal pdsch
WO2022031546A1 (fr) * 2020-08-05 2022-02-10 Idac Holdings, Inc. Indication de faisceau basée sur un groupe d'états de tci

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021217627A1 (fr) * 2020-04-30 2021-11-04 Qualcomm Incorporated Activation de multiples états d'indicateur tci pour un canal pdcch et un canal pdsch
WO2022031546A1 (fr) * 2020-08-05 2022-02-10 Idac Holdings, Inc. Indication de faisceau basée sur un groupe d'états de tci

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ASUSTEK: "Enhancements on multiple TRP or panel transmission", 3GPP DRAFT; R1-1907443 ENHANCEMENTS ON MULTIPLE TRP OR PANEL TRANSMISSION, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Reno, USA; 20190513 - 20190517, 3 May 2019 (2019-05-03), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051709457 *

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