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WO2022052027A1 - Indications de faisceau pour un réseau à fréquence unique (sfn) - Google Patents

Indications de faisceau pour un réseau à fréquence unique (sfn) Download PDF

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Publication number
WO2022052027A1
WO2022052027A1 PCT/CN2020/114698 CN2020114698W WO2022052027A1 WO 2022052027 A1 WO2022052027 A1 WO 2022052027A1 CN 2020114698 W CN2020114698 W CN 2020114698W WO 2022052027 A1 WO2022052027 A1 WO 2022052027A1
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WIPO (PCT)
Prior art keywords
indication
transmissions
downlink
uplink
beam indications
Prior art date
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PCT/CN2020/114698
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English (en)
Inventor
Yan Zhou
Fang Yuan
Tao Luo
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Qualcomm Inc
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Qualcomm Inc
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Priority to PCT/CN2020/114698 priority Critical patent/WO2022052027A1/fr
Publication of WO2022052027A1 publication Critical patent/WO2022052027A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • H04B7/06968—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping using quasi-colocation [QCL] between signals
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0838—Random access procedures, e.g. with 4-step access using contention-free random access [CFRA]

Definitions

  • aspects of the present disclosure relate generally to wireless communication and to techniques for beam indications for a single frequency network (SFN) .
  • SFN single frequency network
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (for example, bandwidth, transmit power, etc. ) .
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) .
  • a user equipment (UE) may communicate with a base station (BS) via the downlink (DL) and uplink (UL) .
  • the DL (or forward link) refers to the communication link from the BS to the UE
  • the UL (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a NodeB, an LTE evolved nodeB (eNB) , a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a New Radio (NR) BS, or a 5G NodeB.
  • eNB LTE evolved nodeB
  • AP access point
  • TRP transmit receive point
  • NR New Radio
  • NR which also may be referred to as 5G
  • 5G is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency-division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the DL, using CP-OFDM or SC-FDM (for example, also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the UL (or a combination thereof) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency-division multiplexing
  • SC-FDM for example, also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)
  • MIMO multiple-input multiple-output
  • the method may include receiving, from a base station (BS) associated with a single frequency network (SFN) , an indication of at least one of a set of uplink beam indications or a set of downlink beam indications; and communicating, with the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • BS base station
  • SFN single frequency network
  • receiving the indication occurs via at least one of: radio resource control (RRC) signaling, medium access control (MAC) control element (MAC-CE) signaling, or downlink control information (DCI) signaling.
  • RRC radio resource control
  • MAC medium access control
  • MAC-CE control element
  • DCI downlink control information
  • receiving the indication includes receiving an indication that a set of beams indicated by the set of uplink beam indications or a set of beams indicated by the set of downlink beam indications are associated with a same antenna port of the UE. In some implementations, receiving the indication includes receiving an indication that a set of beams indicated by the set of uplink beam indications or a set of beams indicated by the set of downlink beam indications are associated with at least one of a communication channel or a reference signal.
  • receiving the indication includes receiving an indication that a set of beams indicated by the set of uplink beam indications are associated with at least one of: physical uplink control channel (PUCCH) demodulation reference signals (DMRS) , physical uplink shared channel (PUSCH) DMRS, physical random access channel (PRACH) communications, or sounding reference signals (SRSs) .
  • PUCCH physical uplink control channel
  • DMRS demodulation reference signals
  • PUSCH physical uplink shared channel
  • PRACH physical random access channel
  • SRSs sounding reference signals
  • receiving the indication includes receiving the set of uplink beam indications including at least one of: spatial relation information associated with the set of uplink beam indications, an uplink transmission configuration indicator (TCI) state associated with the set of uplink beam indications, or a joint downlink and uplink TCI state associated with the set of uplink beam indications.
  • receiving the indication includes receiving an indication of one or more source reference signals, for each uplink beam indication included in the set of uplink beam indications, for indicating uplink spatial relation information for transmission.
  • receiving the indication includes receiving an indication of one or more transmission parameters associated with the set of uplink beam indications. In some implementations, receiving the indication includes receiving an indication of one or more transmission parameters for each uplink beam indication included in the set of uplink beam indications. In some implementations, the one or more transmission parameters include at least one of: one or more power control parameters, an identifier associated with an antenna panel of the UE, a beam group identifier, an antenna port group identifier, a virtual antenna panel identifier, a timing advance group (TAG) identifier, or a timing advance (TA) value. In some implementations, the one or more power control parameters include at least one of: a pathloss reference signal, a nominal power parameter, a pathloss scaling factor, a closed-loop index, or an identifier of a power control group.
  • receiving the indication includes receiving an indication of one or more uplink transmission types or one or more uplink transmission resources associated with the set of uplink beam indications.
  • the one or more uplink transmission types or the one or more uplink transmission resources include at least one of: codebook based PUSCH transmissions, non-codebook based PUSCH transmissions, dynamic grant PUSCH transmissions, configured grant PUSCH transmissions, periodic PUCCH transmissions, semi-persistent PUCCH transmissions, aperiodic PUCCH transmissions, periodic SRS transmissions, semi-persistent SRS transmissions, aperiodic SRS transmissions, SRS transmissions associated with beam management, codebook based SRS transmissions, non-codebook based SRS transmissions, SRS transmissions associated with an antenna switching procedure, contention based random access PRACH transmissions, contention free random access PRACH transmissions, PRACH transmissions associated with an initial access procedure, PRACH transmissions associated with a scheduling request, PRACH transmissions associated with a beam failure recovery procedure, or
  • receiving the indication includes receiving an indication of one or more component carriers (CCs) associated with at least one of the set of uplink beam indications or the set of downlink beam indications.
  • the method can include receiving, via an RRC configuration, an indication of one or more CC lists, where the one or more CCs are associated with a CC list of the one or more CC lists.
  • receiving the indication of the one or more CCs includes receiving the indication of at least one of the set of uplink beam indications or the set of downlink beam indications on a component carrier; and determining a CC list, from the one or more CC lists, that includes the CC on which the indication of at least one of the set of uplink beam indications or the set of downlink beam indications was received.
  • receiving the indication includes receiving an indication that a set of beams indicated by the set of downlink beam indications are associated with at least one of: PDCCH DMRSs, PDSCH DMRSs, CSI-RSs, or PRSs.
  • receiving the indication includes receiving an indication of one or more downlink transmission types or one or more downlink transmission resources associated with the set of downlink beam indications.
  • the one or more downlink transmission types or one or more downlink transmission resources include at least one of: dynamic grant physical downlink shared channel (PDSCH) transmissions, semi-persistent scheduling PDSCH transmissions, PDSCH transmissions using a default PDSCH beam, PDCCH transmissions, periodic CSI-RS transmissions, semi-persistent CSI-RS transmissions, aperiodic CSI-RS transmissions, CSI-RS transmissions associated with beam management, CSI-RS transmissions associated with channel state feedback, or CSI-RS transmissions associated with a tracking reference signal.
  • PDSCH dynamic grant physical downlink shared channel
  • receiving the indication includes receiving the set of downlink beam indications including at least one of: a downlink transmission configuration indicator (TCI) state associated with the set of downlink beam indications, or a joint downlink and uplink TCI state associated with the set of downlink beam indications.
  • TCI downlink transmission configuration indicator
  • receiving the indication includes receiving an indication of one or more source reference signals, for each downlink beam indication included in the set of uplink beam indications, for indicating downlink spatial relation information for reception or for indicating downlink quasi-co-location (QCL) assumption information.
  • the downlink QCL assumption information includes at least one of: a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial reception filter, or spatial relation information for transmission.
  • the downlink QCL assumption information includes at least one of QCL type A information, QCL type B information, QCL type C information, or QCL type D information.
  • the apparatus may include a first interface configured to obtain, from a BS associated with an SFN, an indication of at least one of a set of uplink beam indications or a set of downlink beam indications.
  • the apparatus may include one or more interfaces configured to communicate, with the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the first interface can be configured to obtain a communication, from the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the apparatus may include a second interface configured to output a communication, to the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the apparatus of the UE may perform or implement any one or more of the aspects described in connection with the method, above or elsewhere herein.
  • the non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a UE, may cause the UE to receive, from a BS associated with an SFN, an indication of at least one of a set of uplink beam indications or a set of downlink beam indications; and communicate, with the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the non-transitory computer-readable medium may implement any one or more of the aspects described in connection with the method, above or elsewhere herein.
  • the apparatus may include means for receiving from a BS associated with an SFN, an indication of at least one of a set of uplink beam indications or a set of downlink beam indications.
  • the apparatus may include means for communicating, with the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the apparatus may perform or implement any one or more of the aspects described in connection with the method, above or elsewhere herein.
  • the method may include determining, for use in an SFN, at least one of a set of uplink beam indications or a set of downlink beam indications; and transmitting, to a UE, an indication of at least one of the set of uplink beam indications or the set of downlink beam indications.
  • the method can include communicating, with the UE in the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • transmitting the indication occurs via at least one of: RRC signaling, MAC-CE signaling, or DCI signaling.
  • transmitting the indication includes transmitting an indication that a set of beams indicated by the set of uplink beam indications or a set of beams indicated by the set of downlink beam indications are associated with a same antenna port of the UE.
  • transmitting the indication includes transmitting an indication that a set of beams indicated by the set of uplink beam indications or a set of beams indicated by the set of downlink beam indications are associated with at least one of a communication channel or a reference signal. In some implementations, transmitting the indication includes transmitting an indication that a set of beams indicated by the set of uplink beam indications are associated with at least one of: PUCCH DMRSs, PUSCH DMRSs, PRACH communications, or SRSs.
  • transmitting the indication includes transmitting the set of uplink beam indications including at least one of: spatial relation information associated with the set of uplink beam indications, an uplink TCI state associated with the set of uplink beam indications, or a joint downlink and uplink TCI state associated with the set of uplink beam indications.
  • transmitting the indication includes transmitting an indication of one or more source reference signals, for each uplink beam indication included in the set of uplink beam indications, for indicating uplink spatial relation information for transmission.
  • transmitting the indication includes transmitting an indication of one or more transmission parameters associated with the set of uplink beam indications. In some implementations, transmitting the indication of one or more transmission parameters associated with the set of uplink beam indications includes transmitting an indication of one or more transmission parameters for each uplink beam indication included in the set of uplink beam indications.
  • the one or more transmission parameters include at least one of: one or more power control parameters, an identifier associated with an antenna panel of the UE, a beam group identifier, an antenna port group identifier, a virtual antenna panel identifier, a TAG identifier, or a TA value.
  • the one or more power control parameters include at least one of: a pathloss reference signal, a nominal power parameter, a pathloss scaling factor, a closed-loop index, or an identifier of a power control group.
  • transmitting the indication includes transmitting an indication of one or more uplink transmission types or one or more uplink transmission resources associated with the set of uplink beam indications.
  • the one or more uplink transmission types or the one or more uplink transmission resources include at least one of: codebook based PUSCH transmissions, non-codebook based PUSCH transmissions, dynamic grant PUSCH transmissions, configured grant PUSCH transmissions, periodic PUCCH transmissions, semi-persistent PUCCH transmissions, aperiodic PUCCH transmissions, periodic SRS transmissions, semi-persistent SRS transmissions, aperiodic SRS transmissions, SRS transmissions associated with beam management, codebook based SRS transmissions, non-codebook based SRS transmissions, SRS transmissions associated with an antenna switching procedure, contention based random access PRACH transmissions, contention free random access PRACH transmissions, PRACH transmissions associated with an initial access procedure, PRACH transmissions associated with a scheduling request, PRACH transmissions associated with a beam failure recovery procedure
  • transmitting the indication includes transmitting an indication of one or more CCs associated with at least one of the set of uplink beam indications or the set of downlink beam indications.
  • the method can include transmitting, via an RRC configuration, an indication of one or more CC lists, where the one or more CCs are associated with a CC list.
  • transmitting the indication of the one or more CCs associated with at least one of the set of uplink beam indications or the set of downlink beam indications includes transmitting the indication of at least one of the set of uplink beam indications or the set of downlink beam indications on a CC that is included in a CC list.
  • transmitting the indication includes transmitting an indication that a set of beams indicated by the set of downlink beam indications are associated with at least one of: PDCCH DMRSs, PDSCH DMRSs, CSI-RSs, or PRSs.
  • transmitting the indication includes transmitting an indication of one or more downlink transmission types or one or more downlink transmission resources associated with the set of downlink beam indications.
  • the one or more downlink transmission types or one or more downlink transmission resources include at least one of: dynamic grant PDSCH transmissions, semi-persistent scheduling PDSCH transmissions, PDSCH transmissions using a default PDSCH beam, PDCCH transmissions, periodic CSI-RS transmissions, semi-persistent CSI-RS transmissions, aperiodic CSI-RS transmissions, CSI-RS transmissions associated with beam management, CSI-RS transmissions associated with channel state feedback, or CSI-RS transmissions associated with a tracking reference signal.
  • transmitting the indication includes transmitting the set of downlink beam indications including at least one of: a downlink TCI state associated with the set of downlink beam indications, or a joint downlink and uplink TCI state associated with the set of downlink beam indications.
  • transmitting the indication includes transmitting an indication of one or more source reference signals, for each downlink beam indication included in the set of uplink beam indications, for indicating downlink spatial relation information for reception or for indicating downlink QCL assumption information.
  • the downlink QCL assumption information includes at least one of: a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial reception filter, or spatial relation information for transmission.
  • the downlink QCL assumption information includes at least one of QCL type A information, QCL type B information, QCL type C information, or QCL type D information.
  • the apparatus may include a processing system configured to determine, for use in an SFN, at least one of a set of uplink beam indications or a set of downlink beam indications.
  • the apparatus may include a first interface configured to output, to a UE, an indication of at least one of the set of uplink beam indications or the set of downlink beam indications.
  • the apparatus of the BS may perform or implement any one or more of the aspects described in connection with the method, above or elsewhere herein.
  • the non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a BS, may cause the BS to: determine, for use in an SFN, at least one of a set of uplink beam indications or a set of downlink beam indications; and transmit, to a UE, an indication of at least one of the set of uplink beam indications or the set of downlink beam indications.
  • the non-transitory computer-readable medium may implement any one or more of the aspects described in connection with the method, above or elsewhere herein.
  • the apparatus may include means for determining, for use in an SFN, at least one of a set of uplink beam indications or a set of downlink beam indications.
  • the apparatus may include means for transmitting, to a UE, an indication of at least one of the set of uplink beam indications or the set of downlink beam indications.
  • the apparatus may perform or implement any one or more of the aspects described in connection with the method, above or elsewhere herein.
  • Figure 1 is a diagram illustrating an example of a wireless network.
  • Figure 2 is a diagram illustrating an example of a base station (BS) in communication with a user equipment (UE) in a wireless network.
  • BS base station
  • UE user equipment
  • Figure 3 is a diagram illustrating an example of beamforming architecture that supports beamforming for millimeter wave (mmW) communications.
  • mmW millimeter wave
  • Figure 4 is a diagram illustrating an example of using beams for communications between a BS and a UE
  • Figure 5 is a diagram illustrating an example of physical channels and reference signals in a wireless network.
  • Figure 6 is a diagram illustrating an example process performed, for example, by a UE.
  • Figure 7 is a diagram illustrating an example process performed, for example, by a BS.
  • FIGS 8 and 9 are block diagrams of example apparatuses for wireless communication.
  • the described implementations may be implemented in any device, system or network that is capable of transmitting and receiving radio frequency signals according to any of the wireless communication standards, including any of the IEEE 802.11 standards, the standard, code division multiple access (CDMA) , frequency division multiple access (FDMA) , time division multiple access (TDMA) , Global System for Mobile communications (GSM) , GSM/General Packet Radio Service (GPRS) , Enhanced Data GSM Environment (EDGE) , Terrestrial Trunked Radio (TETRA) , Wideband-CDMA (W-CDMA) , Evolution Data Optimized (EV-DO) , 1xEV-DO, EV-DO Rev A, EV-DO Rev B, High Speed Packet Access (HSPA) , High Speed Downlink Packet Access (HSDPA) , High Speed Uplink Packet Access (HSUPA) , Evolved High Speed Packet Access (HSPA+) , Long Term Evolution (LTE) , AMPS, or other known signals that are used
  • a user equipment may decode a downlink transmission, from a base station (BS) , using a transmission configuration indicator (TCI) , such as a TCI state, as defined in the 3GPP specifications, or another similar data structure.
  • the TCI state may indicate one or more quasi-co-location (QCL) rules, where a rule associates a reference signal (such as a synchronization signal; a synchronization signal block (SSB) ; a channel state information reference signal (CSI-RS) ; or other reference signal) with associated channel properties (such as a Doppler shift; a Doppler spread; an average delay; a delay spread; one or more spatial parameters, such as a spatial filter; or other properties) .
  • QCL rules may include QCL-TypeA, QCL-TypeB, QCL-TypeC, or QCL-TypeD data structures as defined by 3GPP specifications.
  • a BS may transmit a TCI state that indicates one or more reference signals providing a UE with properties for a common beam.
  • a beam may be "common" when the beam is used by the UE to transmit data or control information on the uplink as well as used by the UE to receive data or control information on the downlink.
  • a TCI state that indicates properties for a common beam may be referred to as a joint downlink and uplink TCI state.
  • a joint downlink and uplink TCI state may indicate multiple beams.
  • a UE may operate in a single frequency network (SFN) .
  • SFN may be a network configuration in which multiple cells (for example, multiple BSs or multiple cells associated with a single BS) simultaneously transmit the same signal over the same frequency channel.
  • an SFN may be a broadcast network.
  • An SFN may enable an extended coverage area without the use of additional frequencies.
  • an SFN configuration may include multiple BSs in an SFN area that transmit one or more identical signals using the same frequency at the same, or substantially the same, time.
  • an SFN configuration may include other network devices, such as multiple transmit and receive points (TRPs) corresponding to the same BS. The multiple TRPs may provide coverage for an SFN area.
  • TRPs transmit and receive points
  • the multiple TRPs may transmit one or more identical signals using the same frequency at the same, or substantially the same, time.
  • the identical signal (s) simultaneously transmitted by the multiple BSs may include a physical downlink shared channel (PDSCH) signal, a control resource set (CORESET) scheduling the PDSCH, or a reference signal (for example, an SSB, a CSI-RS, a tracking reference signal (TRS) , or other reference signals) , among other examples.
  • PDSCH physical downlink shared channel
  • CORESET control resource set
  • a reference signal for example, an SSB, a CSI-RS, a tracking reference signal (TRS) , or other reference signals
  • the SFN configuration may be transparent to the UE, and the UE may aggregate, or accumulate, the simultaneous signal transmissions from the multiple BSs, which may provide higher signal quality or higher tolerance for multipath attenuation, among other benefits.
  • a procedure for beam indications for downlink communications from the BS to the UE may be provided.
  • some standards such as the 3GPP specifications
  • the BS and the UE generally manage uplink communications separately, which requires additional processing time as well as additional signaling and network overhead.
  • uplink beam indications within an SFN also may require additional signaling and network overhead.
  • a UE may be provided with a set of multiple uplink beam indications for an SFN and a set of multiple downlink beam indications for the SFN.
  • the set of multiple uplink beam indications and the set of multiple downlink beam indications can be indicated to the same antenna port of the UE for one or more communication channels (for example, data channels or control channels) or one or more reference signals (for example, demodulation reference signals (DMRSs) , sounding reference signals (SRSs) , CSI-RSs, or positioning reference signals (PRSs) ) .
  • DMRSs demodulation reference signals
  • SRSs sounding reference signals
  • CSI-RSs CSI-RSs
  • PRSs positioning reference signals
  • An uplink beam indication may indicate spatial relation information, a TCI state, power control parameters, uplink transmission types, uplink transmission resources, or one or more component carriers (CCs) (for example, cells) with which a beam indicated by the uplink beam indication is associated.
  • a downlink beam indication may indicate QCL assumption information, a TCI state, downlink transmission types, downlink transmission resources, or one or more CCs that a beam indicated by the downlink beam indication is associated with.
  • the set of multiple uplink beam indications, as described herein, for the SFN may clarify uplink beam indications within the SFN, enabling the UE to receive multiple SFN uplink beam indications. As a result, signaling and network overhead associated with indicating uplink beams within a SFN may be reduced. Additionally, the set of multiple uplink beam indications and the set of multiple downlink beam indications for the SFN may enable a unified TCI framework that may simplify a SFN beam management procedure for downlink channels, uplink channels, data channels, and control channels in a 3GPP New Radio (NR) system.
  • NR 3GPP New Radio
  • FIG. 1 is a diagram illustrating an example of a wireless network 100.
  • the wireless network 100 may be or may include elements of a 5G (NR) network, an LTE network, or another type of network.
  • the wireless network 100 may include one or more base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a base station (BS) is an entity that communicates with user equipment (UEs) and also may be referred to as an NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, or a transmit receive point (TRP) .
  • Each BS may provide communication coverage for a particular geographic area.
  • the term "cell" can refer to a coverage area of a BS, a BS subsystem serving this coverage area, or a combination thereof, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, another type of cell, or a combination thereof.
  • a macro cell may cover a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (for example, a home) and may allow restricted access by UEs having association with the femto cell (for example, UEs in a closed subscriber group (CSG) ) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (for example, three) cells.
  • eNB base station
  • NR BS NR BS
  • gNB gNB
  • TRP AP
  • AP AP
  • node B node B
  • 5G NB 5G NB
  • cell may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another as well as to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces, such as a direct physical connection, a virtual network, or a combination thereof using any suitable transport network.
  • the wireless network 100 may include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (for example, a BS or a UE) and send a transmission of the data to a downstream station (for example, a UE or a BS) .
  • a relay station also may be a UE that can relay transmissions for other UEs.
  • a relay BS 110d may communicate with a macro BS 110a and a UE 120d in order to facilitate communication between the macro BS 110a and the UE 120d.
  • a relay BS also may be referred to as a relay station, a relay base station, a relay, etc.
  • the wireless network 100 may be a heterogeneous network that includes BSs of different types, for example, macro BSs, pico BSs, femto BSs, relay BSs, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100.
  • macro BSs may have a high transmit power level (for example, 5 to 40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (for example, 0.1 to 2 watts) .
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • the network controller 130 may communicate with the BSs via a backhaul.
  • the BSs also may communicate with one another, for example, directly or indirectly via a wireless or wireline backhaul.
  • Multiple UEs 120 may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile.
  • a UE also may be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, etc.
  • a UE may be a cellular phone (for example, a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (for example, smart ring, smart bracelet) ) , an entertainment device (for example, a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • PDA personal digital assistant
  • WLL wireless local loop
  • Some UEs may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs.
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that may communicate with a base station, another device (for example, remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (for example, a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices or may be implemented as NB-IoT (narrowband internet of things) devices.
  • IoT Internet-of-Things
  • NB-IoT narrowband internet of things
  • a UE 120 may be included inside a housing that houses components of the UE 120, such as processor components, memory components, or other components.
  • the processor components and the memory components may be coupled together.
  • the processor components for example, one or more processors
  • the memory components for example, a memory
  • the processor components and the memory components may be operatively coupled, communicatively coupled, electronically coupled, or electrically coupled, among other examples.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular RAT and may operate on one or more frequencies.
  • a RAT also may be referred to as a radio technology, an air interface, etc.
  • a frequency also may be referred to as a carrier, a frequency channel, etc.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (for example, without using a base station 110 as an intermediary to communicate with one another) .
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, or similar protocol) , a mesh network, or similar networks, or combinations thereof.
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, as well as other operations described elsewhere herein as being performed by the base station 110.
  • Devices of the wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided based on frequency or wavelength into various classes, bands, or channels.
  • devices of the wireless network 100 may communicate using an operating band having a first frequency range (FR1) , which may span from 410 MHz to 7.125 GHz.
  • devices of the wireless network 100 may communicate using an operating band having a second frequency range (FR2) , which may span from 24.25 GHz to 52.6 GHz.
  • FR1 and FR2 The frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies.
  • FR1 is often referred to as a "sub-6 GHz" band.
  • FR2 is often referred to as a "millimeter wave” band despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
  • EHF extremely high frequency
  • sub-6 GHz may broadly represent frequencies less than 6 GHz, frequencies within FR1, mid-band frequencies (for example, greater than 7.125 GHz) , or a combination thereof.
  • millimeter wave may broadly represent frequencies within the EHF band, frequencies within FR2, mid-band frequencies (for example, less than 24.25 GHz) , or a combination thereof. It is contemplated that the frequencies included in FR1 and FR2 may be modified, and techniques described herein are applicable to those modified frequency ranges.
  • FIG. 2 is a diagram illustrating an example 200 of a base station 110 in communication with a UE 120 in a wireless network 100.
  • the base station 110 may be equipped with T antennas 234a through 234t
  • the UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based on channel quality indicators (CQIs) received from the UE, process (for example, encode and modulate) the data for each UE based on the MCS (s) selected for the UE, and provide data symbols for all UEs.
  • MCS modulation and coding schemes
  • CQIs channel quality indicators
  • the transmit processor 220 also may process system information and control information (for example, CQI requests, grants, upper layer signaling, etc. ) and provide overhead symbols and control symbols.
  • the transmit processor 220 also may generate reference symbols for reference signals and synchronization.
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (for example, precoding) on the data symbols, the control symbols, the overhead symbols, or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (for example, for OFDM, etc. ) to obtain an output sample stream. Each modulator 232 may further process (for example, convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from the modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • the antennas 252a through 252r may receive the downlink signals from the base station 110 or other base stations and may provide received signals to the demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (for example, filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (for example, for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (for example, demodulate and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • controller/processor may refer to one or more controllers, one or more processors, or a combination thereof.
  • a channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , etc.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality
  • CQI channel quality indicator
  • one or more components of the UE 120 may be included in a housing.
  • the network controller 130 may include a communication unit 294, a controller/processor 290, and a memory 292.
  • the network controller 130 may include, for example, one or more devices in a core network.
  • the network controller 130 may communicate with the base station 110 via the communication unit 294.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (for example, for reports including RSRP, RSSI, RSRQ, CQI, etc. ) from a controller/processor 280.
  • the transmit processor 264 also may generate reference symbols for one or more reference signals.
  • the symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modulators 254a through 254r (for example, for DFT-s-OFDM, CP-OFDM, etc. ) , and transmitted to the base station 110.
  • the UE 120 includes a transceiver.
  • the transceiver may include any combination of the antenna (s) 252, the modulators 254, the demodulators 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, or the TX MIMO processor 266.
  • the transceiver may be used by a processor (for example, the controller/processor 280) and the memory 282 to perform aspects of any of the processes described herein.
  • the uplink signals from the UE 120 and other UEs may be received by the antennas 234, processed by the demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120.
  • the receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to a controller/processor 240.
  • the base station 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244.
  • the base station 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink communications, uplink communications, or a combination thereof.
  • the base station 110 includes a transceiver.
  • the transceiver may include any combination of the antenna (s) 234, the modulators 232, the demodulators 232, the MIMO detector 236, the receive processor 238, the transmit processor 220, or the TX MIMO processor 230.
  • the transceiver may be used by a processor (for example, the controller/processor 240) and a memory 242 to perform aspects of any of the processes described herein.
  • the controller/processor 280 may be a component of a processing system.
  • a processing system may generally refer to a system or series of machines or components that receives inputs and processes the inputs to produce a set of outputs (which may be passed to other systems or components of, for example, the UE 120) .
  • a processing system of the UE 120 may refer to a system including the various other components or subcomponents of the UE 120.
  • the processing system of the UE 120 may interface with other components of the UE 120, and may process information received from other components (such as inputs or signals) , output information to other components, etc.
  • a chip or modem of the UE 120 may include a processing system, a first interface to receive or obtain information, and a second interface to output, transmit or provide information.
  • the first interface may refer to an interface between the processing system of the chip or modem and a receiver, such that the UE 120 may receive information or signal inputs, and the information may be passed to the processing system.
  • the second interface may refer to an interface between the processing system of the chip or modem and a transmitter, such that the UE 120 may transmit information output from the chip or modem.
  • the second interface also may obtain or receive information or signal inputs, and the first interface also may output, transmit or provide information.
  • the controller/processor 240 may be a component of a processing system.
  • a processing system may generally refer to a system or series of machines or components that receives inputs and processes the inputs to produce a set of outputs (which may be passed to other systems or components of, for example, the base station 110) .
  • a processing system of the base station 110 may refer to a system including the various other components or subcomponents of the base station 110.
  • the processing system of the base station 110 may interface with other components of the base station 110, and may process information received from other components (such as inputs or signals) , output information to other components, etc.
  • a chip or modem of the base station 110 may include a processing system, a first interface to receive or obtain information, and a second interface to output, transmit or provide information.
  • the first interface may refer to an interface between the processing system of the chip or modem and a receiver, such that the base station 110 may receive information or signal inputs, and the information may be passed to the processing system.
  • the second interface may refer to an interface between the processing system of the chip or modem and a transmitter, such that the base station 110 may transmit information output from the chip or modem.
  • the second interface also may obtain or receive information or signal inputs, and the first interface also may output, transmit or provide information.
  • the controller/processor 240 of the base station 110, the controller/processor 280 of the UE 120, or any other component (s) of Figure 2 may perform one or more techniques associated with beam indications for an SFN, as described in more detail elsewhere herein.
  • the controller/processor 240 of the base station 110, the controller/processor 280 of the UE 120, or any other component (s) (or combinations of components) of Figure 2 may perform or direct operations of, for example, process 600 of Figure 6, process 700 of Figure 7, or other processes as described herein.
  • the memory 242 and the memory 282 may store data and program codes for the base station 110 and the UE 120, respectively.
  • the memory 242 and the memory 282 may include a non-transitory computer-readable medium storing one or more instructions (for example, code or program code) for wireless communication.
  • the one or more instructions when executed (for example, directly, or after compiling, converting, or interpreting) by one or more processors of the base station 110 or the UE 120, may cause the one or more processors, the UE 120, or the base station 110 to perform or direct operations of, for example, process 600 of Figure 6, process 700 of Figure 7, or other processes as described herein.
  • the UE 120 may include means for receiving, from a BS associated with a SFN, an indication of at least one of a set of uplink beam indications or a set of downlink beam indications, means for communicating, with the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications, among other examples, or combinations thereof.
  • such means may include one or more components of the UE 120 described in connection with Figure 2, such as the controller/processor 280, the transmit processor 264, the TX MIMO processor 266, the MOD 254, one or more antennas 252, the DEMOD 254, the MIMO detector 256, or the receive processor 258.
  • the base station 110 may include means for determining, for use in a SFN, at least one of a set of uplink beam indications or a set of downlink beam indications, means for transmitting, to a UE, an indication of at least one of the set of uplink beam indications or the set of downlink beam indications, among other examples, or combinations thereof.
  • such means may include one or more components of the base station 110 described in connection with Figure 2, such as one or more antennas 234, the DEMOD 232, the MIMO detector 236, the receive processor 238, the controller/processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, or the antenna 234, among other examples.
  • While blocks in Figure 2 are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components.
  • the functions described with respect to the transmit processor 264, the receive processor 258, the TX MIMO processor 266, or another processor may be performed by or under the control of the controller/processor 280.
  • Figure 3 is a diagram illustrating an example beamforming architecture 300 that supports beamforming for millimeter wave (mmW) communications.
  • architecture 300 may implement aspects of the wireless network 100.
  • architecture 300 may be implemented in a transmitting device (for example, a first wireless communication device, UE, or BS) or a receiving device (for example, a second wireless communication device, UE, or BS) , as described herein.
  • FIG. 3 is a diagram illustrating example hardware components of a wireless communication device in accordance with certain aspects of the disclosure.
  • the illustrated components may include those that may be used for antenna element selection or for beamforming for transmission of wireless signals.
  • the architecture 300 includes a modem (modulator/demodulator) 302, a digital to analog converter (DAC) 304, a first mixer 306, a second mixer 308, and a splitter 310.
  • the architecture 300 also includes multiple first amplifiers 312, multiple phase shifters 314, multiple second amplifiers 316, and an antenna array 318 that includes multiple antenna elements 320.
  • Reference numbers 322, 324, 326, and 328 indicate regions in the architecture 300 in which different types of signals travel or are processed. Specifically, reference number 322 indicates a region in which digital baseband signals travel or are processed, reference number 324 indicates a region in which analog baseband signals travel or are processed, reference number 326 indicates a region in which analog intermediate frequency (IF) signals travel or are processed, and reference number 328 indicates a region in which analog radio frequency (RF) signals travel or are processed.
  • the architecture also includes a local oscillator A 330, a local oscillator B 332, and a controller/processor 334. In some aspects, controller/processor 334 corresponds to controller/processor 240 of the BS described herein in connection with Figure 2 or controller/processor 280 of the UE described herein in connection with Figure 2.
  • Each of the antenna elements 320 may include one or more sub-elements for radiating or receiving RF signals.
  • a single antenna element 320 may include a first sub-element cross-polarized with a second sub-element that can be used to independently transmit cross-polarized signals.
  • the antenna elements 320 may include patch antennas, dipole antennas, or other types of antennas arranged in a linear pattern, a two dimensional pattern, or another pattern.
  • a spacing between antenna elements 320 may be such that signals with a desired wavelength transmitted separately by the antenna elements 320 may interact or interfere (for example, to form a desired beam) . For example, given an expected range of wavelengths or frequencies, the spacing may provide a quarter wavelength, half wavelength, or other fraction of a wavelength of spacing between neighboring antenna elements 320 to allow for interaction or interference of signals transmitted by the separate antenna elements 320 within that expected range.
  • the modem 302 processes and generates digital baseband signals and may also control operation of the DAC 304, first and second mixers 306, 308, splitter 310, first amplifiers 312, phase shifters 314, or the second amplifiers 316 to transmit signals via one or more or all of the antenna elements 320.
  • the modem 302 may process signals and control operation in accordance with a communication standard such as a wireless standard discussed herein.
  • the DAC 304 may convert digital baseband signals received from the modem 302 (and that are to be transmitted) into analog baseband signals.
  • the first mixer 306 upconverts analog baseband signals to analog IF signals within an IF using a local oscillator A 330.
  • the first mixer 306 may mix the signals with an oscillating signal generated by the local oscillator A 330 to "move" the baseband analog signals to the IF. In some cases, some processing or filtering (not shown) may take place at the IF.
  • the second mixer 308 upconverts the analog IF signals to analog RF signals using the local oscillator B 332. Similar to the first mixer, the second mixer 308 may mix the signals with an oscillating signal generated by the local oscillator B 332 to "move" the IF analog signals to the RF or the frequency at which signals will be transmitted or received.
  • the modem 302 or the controller/processor 334 may adjust the frequency of local oscillator A 330 or the local oscillator B 332 so that a desired IF or RF frequency is produced and used to facilitate processing and transmission of a signal within a desired bandwidth.
  • signals upconverted by the second mixer 308 are split or duplicated into multiple signals by the splitter 310.
  • the splitter 310 in architecture 300 splits the RF signal into multiple identical or nearly identical RF signals.
  • the split may take place with any type of signal, including with baseband digital, baseband analog, or IF analog signals.
  • Each of these signals may correspond to an antenna element 320, and the signal travels through and is processed by amplifiers 312, 316, phase shifters 314, or other elements corresponding to the respective antenna element 320 to be provided to and transmitted by the corresponding antenna element 320 of the antenna array 318.
  • the splitter 310 may be an active splitter that is connected to a power supply and provides some gain so that RF signals exiting the splitter 310 are at a power level equal to or greater than the signal entering the splitter 310.
  • the splitter 310 is a passive splitter that is not connected to power supply and the RF signals exiting the splitter 310 may be at a power level lower than the RF signal entering the splitter 310.
  • the resulting RF signals may enter an amplifier, such as a first amplifier 312, or a phase shifter 314 corresponding to an antenna element 320.
  • the first and second amplifiers 312, 316 are illustrated with dashed lines because one or both of them might not be necessary in some aspects. In some aspects, both the first amplifier 312 and second amplifier 316 are present. In some aspects, neither the first amplifier 312 nor the second amplifier 316 is present. In some aspects, one of the two amplifiers 312, 316 is present but not the other.
  • the splitter 310 is an active splitter, the first amplifier 312 may not be used.
  • the phase shifter 314 is an active phase shifter that can provide a gain, the second amplifier 316 might not be used.
  • the amplifiers 312, 316 may provide a desired level of positive or negative gain.
  • a positive gain (positive dB) may be used to increase an amplitude of a signal for radiation by a specific antenna element 320.
  • a negative gain (negative dB) may be used to decrease an amplitude or suppress radiation of the signal by a specific antenna element.
  • Each of the amplifiers 312, 316 may be controlled independently (for example, by the modem 302 or the controller/processor 334) to provide independent control of the gain for each antenna element 320.
  • the modem 302 or the controller/processor 334 may have at least one control line connected to each of the splitter 310, first amplifiers 312, phase shifters 314, or second amplifiers 316 that may be used to configure a gain to provide a desired amount of gain for each component and thus each antenna element 320.
  • the phase shifter 314 may provide a configurable phase shift or phase offset to a corresponding RF signal to be transmitted.
  • the phase shifter 314 may be a passive phase shifter not directly connected to a power supply. Passive phase shifters might introduce some insertion loss.
  • the second amplifier 316 may boost the signal to compensate for the insertion loss.
  • the phase shifter 314 may be an active phase shifter connected to a power supply such that the active phase shifter provides some amount of gain or prevents insertion loss.
  • the settings of each of the phase shifters 314 are independent, meaning that each can be independently set to provide a desired amount of phase shift or the same amount of phase shift or some other configuration.
  • the modem 302 or the controller/processor 334 may have at least one control line connected to each of the phase shifters 314 and which may be used to configure the phase shifters 314 to provide a desired amount of phase shift or phase offset between antenna elements 320.
  • RF signals received by the antenna elements 320 are provided to one or more first amplifiers 356 to boost the signal strength.
  • the first amplifiers 356 may be connected to the same antenna arrays 318 (for example, for time division duplex (TDD) operations) .
  • the first amplifiers 356 may be connected to different antenna arrays 318.
  • the boosted RF signal is input into one or more phase shifters 354 to provide a configurable phase shift or phase offset for the corresponding received RF signal to enable reception via one or more Rx beams.
  • the phase shifter 354 may be an active phase shifter or a passive phase shifter.
  • the settings of the phase shifters 354 are independent, meaning that each can be independently set to provide a desired amount of phase shift or the same amount of phase shift or some other configuration.
  • the modem 302 or the controller/processor 334 may have at least one control line connected to each of the phase shifters 354 and which may be used to configure the phase shifters 354 to provide a desired amount of phase shift or phase offset between antenna elements 320 to enable reception via one or more Rx beams.
  • the outputs of the phase shifters 354 may be input to one or more second amplifiers 352 for signal amplification of the phase shifted received RF signals.
  • the second amplifiers 352 may be individually configured to provide a configured amount of gain.
  • the second amplifiers 352 may be individually configured to provide an amount of gain to ensure that the signals input to combiner 350 have the same magnitude.
  • the amplifiers 352 or 356 are illustrated in dashed lines because they might not be necessary in some aspects. In some aspects, both the amplifier 352 and the amplifier 356 are present. In another aspect, neither the amplifier 352 nor the amplifier 356 are present. In other aspects, one of the amplifiers 352, 356 is present but not the other.
  • the combiner 350 in architecture 300 combines the RF signal into a signal.
  • the combiner 350 may be a passive combiner (for example, not connected to a power source) , which may result in some insertion loss.
  • the combiner 350 may be an active combiner (for example, connected to a power source) , which may result in some signal gain.
  • When combiner 350 is an active combiner it may provide a different (for example, configurable) amount of gain for each input signal so that the input signals have the same magnitude when they are combined.
  • the combiner 350 may not need the second amplifier 352 because the active combiner may provide the signal amplification.
  • the output of the combiner 350 is input into mixers 348 and 346.
  • Mixers 348 and 346 generally down convert the received RF signal using inputs from local oscillators 372 and 370, respectively, to create intermediate or baseband signals that carry the encoded and modulated information.
  • the output of the mixers 348 and 346 are input into an analog-to-digital converter (ADC) 344 for conversion to analog signals.
  • ADC analog-to-digital converter
  • the analog signals output from ADC 344 is input to modem 302 for baseband processing, such as decoding, de-interleaving, among other examples.
  • the architecture 300 is given by way of example only to illustrate an architecture for transmitting or receiving signals. In some cases, the architecture 300 or each portion of the architecture 300 may be repeated multiple times within an architecture to accommodate or provide an arbitrary number of RF chains, antenna elements, or antenna panels. Furthermore, numerous alternate architectures are possible and contemplated. For example, although only a single antenna array 318 is shown, two, three, or more antenna arrays may be included, each with one or more of their own corresponding amplifiers, phase shifters, splitters, mixers, DACs, ADCs, or modems. For example, a single UE may include two, four, or more antenna arrays for transmitting or receiving signals at different physical locations on the UE or in different directions.
  • mixers, splitters, amplifiers, phase shifters and other components may be located in different signal type areas (for example, represented by different ones of the reference numbers 322, 324, 326, 328) in different implemented architectures.
  • a split of the signal to be transmitted into multiple signals may take place at the analog RF, analog IF, analog baseband, or digital baseband frequencies in different examples.
  • amplification or phase shifts may also take place at different frequencies.
  • one or more of the splitter 310, amplifiers 312, 316, or phase shifters 314 may be located between the DAC 304 and the first mixer 306 or between the first mixer 306 and the second mixer 308.
  • the functions of one or more of the components may be combined into one component.
  • phase shifters 314 may perform amplification to include or replace the first or second amplifiers 312, 316.
  • a phase shift may be implemented by the second mixer 308 to obviate the need for a separate phase shifter 314. This technique is sometimes called local oscillator (LO) phase shifting.
  • LO local oscillator
  • the modem 302 or the controller/processor 334 may control one or more of the other components 304 through 372 to select one or more antenna elements 320 or to form beams for transmission of one or more signals.
  • the antenna elements 320 may be individually selected or deselected for transmission of a signal (or signals) by controlling an amplitude of one or more corresponding amplifiers, such as the first amplifiers 312 or the second amplifiers 316.
  • Beamforming includes generation of a beam using multiple signals on different antenna elements, where one or more or all of the multiple signals are shifted in phase relative to each other.
  • the formed beam may carry physical or higher layer reference signals or information.
  • each signal of the multiple signals is radiated from a respective antenna element 320
  • the radiated signals interact, interfere (constructive and destructive interference) , and amplify each other to form a resulting beam.
  • the shape (such as the amplitude, width, or presence of side lobes) and the direction (such as an angle of the beam relative to a surface of the antenna array 318) can be dynamically controlled by modifying the phase shifts or phase offsets imparted by the phase shifters 314 and amplitudes imparted by the amplifiers 312, 316 of the multiple signals relative to each other.
  • the controller/processor 334 may be located partially or fully within one or more other components of the architecture 300. For example, the controller/processor 334 may be located within the modem 302 in some aspects.
  • Figure 4 is a diagram illustrating an example 400 of using beams for communications between a BS and a UE. As shown in Figure 4, a BS 110 and a UE 120 may communicate with one another.
  • the BS 110 may transmit to UEs 120 located within a coverage area of the BS 110.
  • the BS 110 and the UE 120 may be configured for beamformed communications, where the BS 110 may transmit in the direction of the UE 120 using a directional BS transmit beam, and the UE 120 may receive the transmission using a directional UE receive beam.
  • Each BS transmit beam may have an associated beam ID, beam direction, or beam symbols, among other examples.
  • the BS 110 may transmit downlink communications via one or more BS transmit beams 405.
  • the UE 120 may attempt to receive downlink transmissions via one or more UE receive beams 410, which may be configured using different beamforming parameters at receive circuitry of the UE 120.
  • the UE 120 may identify a particular BS transmit beam 405, shown as BS transmit beam 405-A, and a particular UE receive beam 410, shown as UE receive beam 410-A, that provide relatively favorable performance (for example, that have a best channel quality of the different measured combinations of BS transmit beams 405 and UE receive beams 410) .
  • the UE 120 may transmit an indication of which BS transmit beam 405 is identified by the UE 120 as a preferred BS transmit beam, which the BS 110 may select for transmissions to the UE 120.
  • the UE 120 may thus attain and maintain a beam pair link (BPL) with the BS 110 for downlink communications (for example, a combination of the BS transmit beam 405-A and the UE receive beam 410-A) , which may be further refined and maintained in accordance with one or more established beam refinement procedures.
  • BPL beam pair link
  • a downlink beam such as a BS transmit beam 405 or a UE receive beam 410, may be associated with a TCI state.
  • a TCI state may indicate a directionality or a characteristic of the downlink beam, such as one or more QCL properties of the downlink beam.
  • a QCL property may include, for example, a Doppler shift, a Doppler spread, an average delay, a delay spread, or spatial receive parameters, among other examples.
  • each BS transmit beam 405 may be associated with an SSB, and the UE 120 may indicate a preferred BS transmit beam 405 by transmitting uplink transmissions in resources of the SSB that are associated with the preferred BS transmit beam 405.
  • a particular SSB may have an associated TCI state (for example, for an antenna port or for beamforming) .
  • the BS 110 may, in some examples, indicate a downlink BS transmit beam 405 based on antenna port QCL properties that may be indicated by the TCI state.
  • a TCI state may be associated with one downlink reference signal set (for example, an SSB and an aperiodic, periodic, or semi-persistent CSI-RS) for different QCL types (for example, QCL types for different combinations of Doppler shift, Doppler spread, average delay, delay spread, or spatial receive parameters, among other examples) .
  • the QCL type indicates spatial receive parameters
  • the QCL type may correspond to analog receive beamforming parameters of a UE receive beam 410 at the UE 120.
  • the UE 120 may select a corresponding UE receive beam 410 from a set of BPLs based on the BS 110 indicating a BS transmit beam 405 via a TCI indication.
  • the BS 110 may maintain a set of activated TCI states for downlink shared channel transmissions and a set of activated TCI states for downlink control channel transmissions.
  • the set of activated TCI states for downlink shared channel transmissions may correspond to beams that the BS 110 uses for downlink transmission on a PDSCH.
  • the set of activated TCI states for downlink control channel communications may correspond to beams that the BS 110 may use for downlink transmission on a physical downlink control channel (PDCCH) or in a control resource set (CORESET) .
  • the UE 120 may also maintain a set of activated TCI states for receiving the downlink shared channel transmissions and the CORESET transmissions.
  • the UE 120 may have one or more antenna configurations based on the TCI state, and the UE 120 may not need to reconfigure antennas or antenna weighting configurations.
  • the set of activated TCI states for example, activated PDSCH TCI states and activated CORESET TCI states
  • RRC radio resource control
  • the UE 120 may transmit in the direction of the BS 110 using a directional UE transmit beam, and the BS 110 may receive the transmission using a directional BS receive beam.
  • Each UE transmit beam may have an associated beam ID, beam direction, or beam symbols, among other examples.
  • the UE 120 may transmit uplink communications via one or more UE transmit beams 415.
  • the BS 110 may receive uplink transmissions via one or more BS receive beams 420.
  • the BS 110 may identify a particular UE transmit beam 415, shown as UE transmit beam 415-A, and a particular BS receive beam 420, shown as BS receive beam 420-A, that provide relatively favorable performance (for example, that have a best channel quality of the different measured combinations of UE transmit beams 415 and BS receive beams 420) .
  • the BS 110 may transmit an indication of which UE transmit beam 415 is identified by the BS 110 as a preferred UE transmit beam, which the BS 110 may select for transmissions from the UE 120.
  • the UE 120 and the BS 110 may thus attain and maintain a BPL for uplink communications (for example, a combination of the UE transmit beam 415-A and the BS receive beam 420-A) , which may be further refined and maintained in accordance with one or more established beam refinement procedures.
  • An uplink beam such as a UE transmit beam 415 or a BS receive beam 420, may be associated with a spatial relation.
  • a spatial relation may indicate a directionality or a characteristic of the uplink beam, similar to one or more QCL properties, as described herein.
  • Figure 5 is a diagram illustrating an example 500 of physical channels and reference signals in a wireless network.
  • downlink channels and downlink reference signals may carry information from a BS 110 to a UE 120
  • uplink channels and uplink reference signals may carry information from a UE 120 to a BS 110.
  • a downlink channel may include a PDCCH that carries downlink control information (DCI) , a PDSCH that carries downlink data, or a physical broadcast channel (PBCH) that carries system information, among other examples.
  • PDSCH communications may be scheduled by PDCCH communications.
  • an uplink channel may include a physical uplink control channel (PUCCH) that carries uplink control information (UCI) , a physical uplink shared channel (PUSCH) that carries uplink data, or a physical random access channel (PRACH) used for initial network access, among other examples.
  • the UE 120 may transmit acknowledgement (ACK) or negative acknowledgement (NACK) feedback (for example, ACK/NACK feedback or ACK/NACK information) in UCI on the PUCCH or the PUSCH.
  • ACK acknowledgement
  • NACK negative acknowledgement
  • a downlink reference signal may include an SSB, a CSI-RS, a demodulation reference signal (DMRS) , a positioning reference signal (PRS) , or a phase tracking reference signal (PTRS) , among other examples.
  • an uplink reference signal may include a sounding reference signal (SRS) , a DMRS, or a PTRS, among other examples.
  • An SSB may carry information used for initial network acquisition and synchronization, such as a primary synchronization signal (PSS) , a secondary synchronization signal (SSS) , a PBCH, and a PBCH DMRS.
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH PBCH
  • DMRS PBCH DMRS
  • An SSB is sometimes referred to as a synchronization signal/PBCH (SS/PBCH) block.
  • the BS 110 may transmit multiple SSBs on multiple corresponding beams, and the SSBs may be used for beam selection.
  • a CSI-RS may carry information used for downlink channel estimation (for example, downlink CSI acquisition) , which may be used for scheduling, link adaptation, or beam management, among other examples.
  • the BS 110 may configure a set of CSI-RSs for the UE 120, and the UE 120 may measure the configured set of CSI-RSs.
  • the UE 120 may perform channel estimation and may report channel estimation parameters to the BS 110 (for example, in a CSI report) , such as a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a CSI-RS resource indicator (CRI) , a layer indicator (LI) , a rank indicator (RI) , or a reference signal received power (RSRP) , among other examples.
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • CRI CSI-RS resource indicator
  • LI layer indicator
  • RI rank indicator
  • RSRP reference signal received power
  • the BS 110 may use the CSI report to select transmission parameters for downlink communications to the UE 120, such as a number of transmission layers (for example, a rank) , a precoding matrix (for example, a precoder) , a modulation and coding scheme (MCS) , or a refined downlink beam (for example, using a beam refinement procedure or a beam management procedure) , among other examples.
  • a number of transmission layers for example, a rank
  • a precoding matrix for example, a precoder
  • MCS modulation and coding scheme
  • a refined downlink beam for example, using a beam refinement procedure or a beam management procedure
  • a DMRS may carry information used to estimate a radio channel for demodulation of an associated physical channel (for example, PDCCH, PDSCH, PBCH, PUCCH, or PUSCH) .
  • the design and mapping of a DMRS may be specific to a physical channel for which the DMRS is used for estimation.
  • DMRSs are UE-specific, can be beamformed, can be confined in a scheduled resource (for example, rather than transmitted on a wideband) , and can be transmitted only when necessary. As shown, DMRSs are used for both downlink communications and uplink communications.
  • a PTRS may carry information used to compensate for oscillator phase noise.
  • the phase noise increases as the oscillator carrier frequency increases.
  • PTRS can be utilized at high carrier frequencies, such as millimeter wave frequencies, to mitigate phase noise.
  • the PTRS may be used to track the phase of the local oscillator and to enable suppression of phase noise and common phase error (CPE) .
  • CPE common phase error
  • PTRSs are used for both downlink communications (for example, on the PDSCH) and uplink communications (for example, on the PUSCH) .
  • a PRS may carry information used to enable timing or ranging measurements of the UE 120 based on signals transmitted by the BS 110 to improve observed time difference of arrival (OTDOA) positioning performance.
  • a PRS may be a pseudo-random Quadrature Phase Shift Keying (QPSK) sequence mapped in diagonal patterns with shifts in frequency and time to avoid collision with cell-specific reference signals and control channels (for example, a PDCCH) .
  • QPSK Quadrature Phase Shift Keying
  • a PRS may be designed to improve detectability by the UE 120, which may need to detect downlink signals from multiple neighboring BSs in order to perform OTDOA-based positioning.
  • the UE 120 may receive a PRS from multiple cells (for example, a reference cell and one or more neighbor cells) , and may report a reference signal time difference (RSTD) based on OTDOA measurements associated with the PRSs received from the multiple cells.
  • RSTD reference signal time difference
  • the BS 110 may then calculate a position of the UE 120 based on the RSTD measurements reported by the UE 120.
  • An SRS may carry information used for uplink channel estimation, which may be used for scheduling, link adaptation, precoder selection, or beam management, among other examples.
  • the BS 110 may configure one or more SRS resource sets for the UE 120, and the UE 120 may transmit SRSs on the configured SRS resource sets.
  • An SRS resource set may have a configured usage, such as uplink CSI acquisition, downlink CSI acquisition for reciprocity-based operations, uplink beam management, among other examples.
  • the BS 110 may measure the SRSs, may perform channel estimation based on the measurements, and may use the SRS measurements to configure communications with the UE 120.
  • a BS 110 associated with an SFN may indicate a set of multiple uplink beam indications or a set of multiple downlink beam indications for a UE 120.
  • the BS 110 and the UE 120 may communicate (for example, transmit or receive) in the SFN using at least one beam indicated by the set of multiple uplink beam indications or one beam indicated by the set of multiple downlink beam indications.
  • the set of multiple uplink (UL) beam indications may be indicated to the same UE 120 antenna port for any of PUCCH, the DMRS of PUSCH, SRS, or PRACH.
  • An UL beam indication may indicate spatial relation information, an UL TCI state, or a joint downlink and uplink (DL/UL) TCI state.
  • Each UL beam indication, included in the set of multiple UL beam indications, may include one source reference signal (RS) for an UL spatial transmit filter indication. Additional information can be indicated inside or outside each UL beam indication.
  • RS source reference signal
  • the additional information may include power control parameters (such as a pathloss reference signal, a nominal power parameter (P0) , a pathloss scaling factor (alpha) , a closed-loop index, or an identifier of a power control group (PC group ID) ) , UE 120 antenna panel identifiers or similar identifiers (such as a beam group identifier, an antenna port group identifier, or a virtual panel identifier) , a timing advance group (TAG) identifier, or a timing advance (TA) value.
  • power control parameters such as a pathloss reference signal, a nominal power parameter (P0) , a pathloss scaling factor (alpha) , a closed-loop index, or an identifier of a power control group (PC group ID)
  • PC group ID power control group
  • UE 120 antenna panel identifiers or similar identifiers such as a beam group identifier, an antenna port group identifier, or a virtual panel identifier
  • the set of multiple UL beam indications for UL SFN may be activated by RRC, medium access control (MAC) control element (MAC-CE) , or DCI.
  • the set of multiple UL beam indications for UL SFN may be applied to all or a subset of UL transmission types or resources.
  • Applicable UL transmission types for UL beam indications in UL SFN include any of codebook (CB) or non-codebook (NCB) based PUSCH, dynamic grant (DG) or configured grant (CG) based PUSCH, periodic, semi-persistent, or aperiodic (P/SP/AP) PUCCH, P/SP/AP SRS for beam management (BM) , SRS for CB based uplink transmission, SRS for NCB based uplink transmission, SRS for antenna switching, contention based random access (CBRA) or contention free random access (CFRA) PRACH for initial access (IA) , scheduling request (SR) , beam failure recovery (BFR) or PDCCH order.
  • CB codebook
  • NCB non-codebook
  • DG dynamic grant
  • CG configured grant
  • P/SP/AP aperiodic
  • P/SP/AP SRS for beam management (BM) SRS for CB based uplink transmission
  • SRS for NCB based uplink transmission SRS for
  • the set of multiple UL beam indication IDs for UL SFN or corresponding applicable UL transmission types/resource IDs may be applied to multiple CCs, which may be indicated in a CC list.
  • the UE 120 may receive an indication of one or more CC lists from the BS 110 via RRC signaling (for example, when carrier aggregation (CA) is configured for the UE 120) .
  • CA carrier aggregation
  • the selected CC list may be the CC list containing the CC where the set of multiple UL beam indication IDs for UL SFN is applied to.
  • the UE 120 may apply the same set of multiple UL beam indication IDs for UL SFN (or corresponding applicable UL transmission types/resource IDs) to each CC in the CC list.
  • the set of multiple downlink (DL) beam indications indicated to the same port for any of the DMRS of PDCCH or PDSCH, CSI-RS, PRS, or corresponding applicable DL transmission types or DL transmission resource identifiers may be applied to multiple CCs.
  • the multiple CCs may be included in a CC list.
  • the BS 110 may indicate one or more CC lists via RRC signaling (for example, when carrier aggregation (CA) is configured for the UE 120) .
  • CA carrier aggregation
  • a selected CC list may be the CC list containing the CC where the set of multiple DL beam indication IDs for DL SFN is applied to.
  • the UE 120 may apply the same set of multiple DL beam indication IDs for DL SFN (or corresponding applicable DL transmission types/resource IDs) to each CC in the CC list.
  • DL downlink
  • a DL beam indication may indicate a DL TCI state, or a joint DL/UL TCI state.
  • Each DL beam indication may indicate one source RS for a DL spatial receive filter indication or for providing DL QCL assumption information (such as QCL type A, QCL type B, QCL type C, or QCL type D, as defined, or otherwise fixed, by the 3GPP specifications) .
  • the set of multiple DL beam indications for DL SFN can be activated by RRC, MAC-CE, or DCI, and can be applied to all or a subset of DL transmission types or downlink transmission resources.
  • Applicable DL transmission types for DL beam indications in DL SFN include any of DG or semi-persistent scheduling (SPS) based PDSCH, a default beam based PDSCH, PDCCH, P/SP/AP CSI-RS for BM, channel state feedback (CSF) , or a TRS.
  • SPS semi-persistent scheduling
  • FIG. 6 is a diagram illustrating an example process 600 performed, for example, by a UE.
  • the process 600 is an example where the UE (such as the UE 120 depicted in, and described in connection with, Figures 1–5) performs operations associated with beam indications for a SFN.
  • the UE such as the UE 120 depicted in, and described in connection with, Figures 1–5 performs operations associated with beam indications for a SFN.
  • the process 600 may include receiving, from a BS associated with an SFN, an indication of at least one of a set of uplink beam indications or a set of downlink beam indications (block 610) .
  • the UE (such as by using reception component 802, depicted in Figure 8) may receive, from a BS associated with an SFN, an indication of at least one of a set of uplink beam indications or a set of downlink beam indications, as described above.
  • the reception component 802 can be configured to obtain, from a BS associated with an SFN, an indication of at least one of a set of uplink beam indications or a set of downlink beam indications.
  • the process 600 may include communicating, with the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications (block 620) .
  • the UE (such as by using communication component 808, reception component 802, or transmission component 804, depicted in Figure 8) may communicate, with the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications, as described above.
  • the communication component 808 can be configured to communicate, with the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the reception component 802 can be configured to obtain, from the BS associated with the SFN, a communication using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the transmission component 804 can be configured to output, to the BS associated with the SFN, a communication using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the process 600 may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes described elsewhere herein.
  • receiving the indication occurs via at least one of RRC signaling, MAC-CE signaling, or DCI signaling.
  • receiving the indication includes receiving an indication that a set of beams indicated by the set of uplink beam indications or a set of beams indicated by the set of downlink beam indications are associated with a same antenna port of the UE.
  • receiving the indication includes receiving an indication that a set of beams indicated by the set of uplink beam indications or a set of beams indicated by the set of downlink beam indications are associated with at least one of a communication channel or a reference signal.
  • receiving the indication includes receiving an indication that a set of beams indicated by the set of uplink beam indications are associated with at least one of PUCCH DMRSs, PUSCH DMRSs, PRACH communications, or SRSs.
  • receiving the indication includes receiving the set of uplink beam indications including at least one of spatial relation information associated with the set of uplink beam indications, an uplink TCI state associated with the set of uplink beam indications, or a joint downlink and uplink TCI state associated with the set of uplink beam indications.
  • receiving the indication includes receiving an indication of one or more source reference signals, for each uplink beam indication included in the set of uplink beam indications, for indicating uplink spatial relation information for transmission.
  • receiving the indication includes receiving an indication of one or more transmission parameters associated with the set of uplink beam indications.
  • receiving the indication includes receiving an indication of one or more transmission parameters for each uplink beam indication included in the set of uplink beam indications.
  • the one or more transmission parameters include at least one of one or more power control parameters, an identifier associated with an antenna panel of the UE, a beam group identifier, an antenna port group identifier, a virtual antenna panel identifier, a timing advance group (TAG) identifier, or a timing advance (TA) value.
  • the one or more power control parameters include at least one of a pathloss reference signal, a nominal power parameter, a pathloss scaling factor, a closed-loop index, or an identifier of a power control group.
  • receiving the indication includes receiving an indication of one or more uplink transmission types or one or more uplink transmission resources associated with the set of uplink beam indications.
  • the one or more uplink transmission types or the one or more uplink transmission resources include at least one of: codebook based PUSCH transmissions, non-codebook based PUSCH transmissions, dynamic grant PUSCH transmissions, configured grant PUSCH transmissions, periodic PUCCH transmissions, semi-persistent PUCCH transmissions, aperiodic PUCCH transmissions, periodic SRS transmissions, semi-persistent SRS transmissions, aperiodic SRS transmissions, SRS transmissions associated with beam management, codebook based SRS transmissions, non-codebook based SRS transmissions, SRS transmissions associated with an antenna switching procedure, contention based random access PRACH transmissions, contention free random access PRACH transmissions, PRACH transmissions associated with an initial access procedure, PRACH transmissions associated with a scheduling request, PRACH transmissions associated with a beam failure recovery procedure, or PRACH transmissions associated with a physical downlink control channel order.
  • receiving the indication includes receiving an indication of one or more CCs associated with at least one of the set of uplink beam indications or the set of downlink beam indications.
  • the process 600 includes receiving, via an RRC configuration, an indication of one or more CC lists, where the one or more CCs are associated with a CC list of the one or more CC lists.
  • receiving the indication of the one or more CCs includes receiving the indication of at least one of the set of uplink beam indications or the set of downlink beam indications on a component carrier, and determining a CC list, from the one or more CC lists, that includes the CC on which the indication of at least one of the set of uplink beam indications or the set of downlink beam indications was received.
  • receiving the indication includes receiving an indication that a set of beams indicated by the set of downlink beam indications are associated with at least one of PDCCH DMRSs, PDSCH DMRSs, CSI-RSs, or PRSs.
  • receiving the indication includes receiving an indication of one or more downlink transmission types or one or more downlink transmission resources associated with the set of downlink beam indications.
  • the one or more downlink transmission types or one or more downlink transmission resources include at least one of dynamic grant PDSCH transmissions, semi-persistent scheduling PDSCH transmissions, PDSCH transmissions using a default PDSCH beam, PDCCH transmissions, periodic CSI-RS transmissions, semi-persistent CSI-RS transmissions, aperiodic CSI-RS transmissions, CSI-RS transmissions associated with beam management, CSI-RS transmissions associated with channel state feedback, or CSI-RS transmissions associated with a tracking reference signal.
  • receiving the indication includes receiving the set of downlink beam indications including at least one of a downlink TCI state associated with the set of downlink beam indications, or a joint downlink and uplink TCI state associated with the set of downlink beam indications.
  • receiving the indication includes receiving an indication of one or more source reference signals, for each downlink beam indication included in the set of uplink beam indications, for indicating downlink spatial relation information for reception or for indicating downlink QCL assumption information.
  • the downlink QCL assumption information includes at least one of a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial reception filter, or spatial relation information for transmission.
  • the downlink QCL assumption information includes at least one of QCL type A information, QCL type B information, QCL type C information, or QCL type D information.
  • Figure 6 shows example blocks of the process 600
  • the process 600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 6. Additionally, or alternatively, two or more of the blocks of the process 600 may be performed in parallel.
  • FIG 7 is a diagram illustrating an example process 700 performed, for example, by a BS.
  • the process 700 is an example where the BS (such as the BS 110 depicted in, and described in connection with, Figures 1–6) performs operations associated with beam indications for a SFN.
  • the BS such as the BS 110 depicted in, and described in connection with, Figures 1–6 performs operations associated with beam indications for a SFN.
  • the process 700 may include determining, for use in an SFN, at least one of a set of uplink beam indications or a set of downlink beam indications (block 710) .
  • the BS (such as by using beam management component 908, depicted in Figure 9) may determine, for use in an SFN, at least one of a set of uplink beam indications or a set of downlink beam indications, as described above.
  • the beam management component 908 may include a processing system of the BS that can be configured to determine, for use in an SFN, at least one of a set of uplink beam indications or a set of downlink beam indications.
  • the process 700 may include transmitting, to a UE, an indication of at least one of the set of uplink beam indications or the set of downlink beam indications (block 720) .
  • the BS (such as by using transmission component 904, depicted in Figure 9) may transmit, to a UE, an indication of at least one of the set of uplink beam indications or the set of downlink beam indications, as described above.
  • the transmission component 904 can be configured to output, to a UE, an indication of at least one of the set of uplink beam indications or the set of downlink beam indications.
  • the process 700 may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes described elsewhere herein.
  • the process 700 includes communicating, with the UE in the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • transmitting the indication occurs via at least one of RRC signaling, MAC-CE signaling, or DCI signaling.
  • transmitting the indication includes transmitting an indication that a set of beams indicated by the set of uplink beam indications or a set of beams indicated by the set of downlink beam indications are associated with a same antenna port of the UE.
  • transmitting the indication includes transmitting an indication that a set of beams indicated by the set of uplink beam indications or a set of beams indicated by the set of downlink beam indications are associated with at least one of a communication channel or a reference signal.
  • transmitting the indication includes transmitting an indication that a set of beams indicated by the set of uplink beam indications are associated with at least one of PUCCH DMRSs, PUSCH DMRSs, PRACH communications, or SRSs.
  • transmitting the indication includes transmitting the set of uplink beam indications including at least one of spatial relation information associated with the set of uplink beam indications, an uplink TCI state associated with the set of uplink beam indications, or a joint downlink and uplink TCI state associated with the set of uplink beam indications.
  • transmitting the indication includes transmitting an indication of one or more source reference signals, for each uplink beam indication included in the set of uplink beam indications, for indicating uplink spatial relation information for transmission.
  • transmitting the indication includes transmitting an indication of one or more transmission parameters associated with the set of uplink beam indications.
  • transmitting the indication of one or more transmission parameters associated with the set of uplink beam indications includes transmitting an indication of one or more transmission parameters for each uplink beam indication included in the set of uplink beam indications.
  • the one or more transmission parameters include at least one of one or more power control parameters, an identifier associated with an antenna panel of the UE, a beam group identifier, an antenna port group identifier, a virtual antenna panel identifier, a timing advance group identifier, or a timing advance value.
  • the one or more power control parameters include at least one of a pathloss reference signal, a nominal power parameter, a pathloss scaling factor, a closed-loop index, or an identifier of a power control group.
  • transmitting the indication includes transmitting an indication of one or more uplink transmission types or one or more uplink transmission resources associated with the set of uplink beam indications.
  • the one or more uplink transmission types or the one or more uplink transmission resources include at least one of: codebook based PUSCH transmissions, non-codebook based PUSCH transmissions, dynamic grant PUSCH transmissions, configured grant PUSCH transmissions, periodic PUCCH transmissions, semi-persistent PUCCH transmissions, aperiodic PUCCH transmissions, periodic SRS transmissions, semi-persistent SRS transmissions, aperiodic SRS transmissions, SRS transmissions associated with beam management, codebook based SRS transmissions, non-codebook based SRS transmissions, SRS transmissions associated with an antenna switching procedure, contention based random access PRACH transmissions, contention free random access PRACH transmissions, PRACH transmissions associated with an initial access procedure, PRACH transmissions associated with a scheduling request, PRACH transmissions associated with a beam failure recovery procedure, or PRACH transmissions associated with a PDCCH order.
  • transmitting the indication includes transmitting an indication of one or more CCs associated with at least one of the set of uplink beam indications or the set of downlink beam indications.
  • the process 700 includes transmitting, via an RRC configuration, an indication of one or more CC lists, where the one or more CCs are associated with a CC list.
  • transmitting the indication of the one or more CCs associated with at least one of the set of uplink beam indications or the set of downlink beam indications includes transmitting the indication of at least one of the set of uplink beam indications or the set of downlink beam indications on a CC that is included in a CC list.
  • transmitting the indication includes transmitting an indication that a set of beams indicated by the set of downlink beam indications are associated with at least one of PDCCH DMRSs, PDSCH DMRSs, CSI-RSs, or PRSs.
  • transmitting the indication includes transmitting an indication of one or more downlink transmission types or one or more downlink transmission resources associated with the set of downlink beam indications.
  • the one or more downlink transmission types or one or more downlink transmission resources include at least one of dynamic grant PDSCH transmissions, SPS PDSCH transmissions, PDSCH transmissions using a default PDSCH beam, PDCCH transmissions, periodic CSI-RS transmissions, semi-persistent CSI-RS transmissions, aperiodic CSI-RS transmissions, CSI-RS transmissions associated with beam management, CSI-RS transmissions associated with channel state feedback, or CSI-RS transmissions associated with a tracking reference signal.
  • transmitting the indication includes transmitting the set of downlink beam indications including at least one of a downlink TCI state associated with the set of downlink beam indications, or a joint downlink and uplink TCI state associated with the set of downlink beam indications.
  • transmitting the indication includes transmitting an indication of one or more source reference signals, for each downlink beam indication included in the set of uplink beam indications, for indicating downlink spatial relation information for reception or for indicating downlink QCL assumption information.
  • the downlink QCL assumption information includes at least one of a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial reception filter, or spatial relation information for transmission.
  • the downlink QCL assumption information includes at least one of QCL type A information, QCL type B information, QCL type C information, or QCL type D information.
  • Figure 7 shows example blocks of the process 700
  • the process 700 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 7. Additionally, or alternatively, two or more of the blocks of the process 700 may be performed in parallel.
  • FIG 8 is a block diagram of an example apparatus 800 for wireless communication.
  • the apparatus 800 may be a UE (such as the UE 120 depicted in, and described in connection with, Figures 1–5) , or a UE may include the apparatus 800.
  • the apparatus 800 includes a reception component 802 and a transmission component 804, which may be in communication with one another (for example, via one or more buses or one or more other components) .
  • the apparatus 800 may communicate with another apparatus 806 (such as a UE, a base station, or another wireless communication device) using the reception component 802 and the transmission component 804.
  • the apparatus 800 may include one or more of a communication component 808, or a determination component 810, among other examples.
  • the apparatus 800 may be configured to perform one or more operations described herein. Additionally or alternatively, the apparatus 800 may be configured to perform one or more processes described herein, such as process 600 of Figure 6, or a combination thereof.
  • the apparatus 800 or one or more components shown in Figure 8 may include one or more components of the UE described above in connection with Figure 2. Additionally, or alternatively, one or more components shown in Figure 8 may be implemented within one or more components described above in connection with Figure 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.
  • the reception component 802 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 806.
  • the reception component 802 may provide received communications to one or more other components of the apparatus 800.
  • the reception component 802 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 806.
  • the reception component 802 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Figure 2.
  • the reception component 802 may include an interface with a processing system of the apparatus 800 (for example, the first interface of the UE 120 described herein in connection with Figure 2) .
  • the reception component 802 may be configured to obtain or receive information via the interface.
  • the transmission component 804 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 806.
  • one or more other components of the apparatus 806 may generate communications and may provide the generated communications to the transmission component 804 for transmission to the apparatus 806.
  • the transmission component 804 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 806.
  • the transmission component 804 may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Figure 2. In some aspects, the transmission component 804 may be collocated with the reception component 802 in a transceiver. In some aspects, the transmission component 804 may include an interface with a processing system of the apparatus 800 (for example, the second interface of the UE 120 described herein in connection with Figure 2) . The transmission component 804 may be configured to output or transmit information via the interface.
  • the reception component 802 may receive, from a BS associated with an SFN, an indication of at least one of a set of uplink beam indications or a set of downlink beam indications.
  • the communication component 808 may communicate, with the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the communication component 808 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Figure 2.
  • the communication component 808 may cause the reception component 802 to receive a communication, from the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications. In some aspects, the communication component 808 may cause the transmission component 804 to transmit a communication, to the BS associated with the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the reception component 802 may receive an indication that a set of beams indicated by the set of uplink beam indications or a set of beams indicated by the set of downlink beam indications are associated with a same antenna port of the UE.
  • the reception component 802 may receive an indication that a set of beams indicated by the set of uplink beam indications or a set of beams indicated by the set of downlink beam indications are associated with at least one of a communication channel or a reference signal.
  • the reception component 802 may receive an indication that a set of beams indicated by the set of uplink beam indications are associated with at least one of PUCCH DMRS, PUSCH DMRS, PRACH communications, or SRSs.
  • the reception component 802 may receive the set of uplink beam indications including at least one of spatial relation information associated with the set of uplink beam indications, an uplink TCI state associated with the set of uplink beam indications, or a joint downlink and uplink TCI state associated with the set of uplink beam indications.
  • the reception component 802 may receive an indication of one or more source reference signals, for each uplink beam indication included in the set of uplink beam indications, for indicating uplink spatial relation information for transmission.
  • the reception component 802 may receive an indication of one or more transmission parameters associated with the set of uplink beam indications.
  • the reception component 802 may receive an indication of one or more transmission parameters for each uplink beam indication included in the set of uplink beam indications.
  • the reception component 802 may receive an indication of one or more uplink transmission types or one or more uplink transmission resources associated with the set of uplink beam indications.
  • the reception component 802 may receive an indication of one or more CCs associated with at least one of the set of uplink beam indications or the set of downlink beam indications.
  • the reception component 802 may receive, via an RRC configuration, an indication of one or more CC lists, where one or more CCs are associated with a CC list of the one or more CC lists.
  • the reception component 802 may receive the indication of at least one of the set of uplink beam indications or the set of downlink beam indications on a component carrier.
  • the determination component 810 may determine a CC list, from the one or more CC lists, that includes the CC on which the indication of at least one of the set of uplink beam indications or the set of downlink beam indications was received.
  • the determination component 810 may include a receive processor, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, a processing system, or a combination thereof, of the UE described above in connection with Figure 2.
  • the reception component 802 may receive an indication of one or more downlink transmission types or one or more downlink transmission resources associated with the set of downlink beam indications.
  • the reception component 802 may receive an indication of one or more source reference signals, for each downlink beam indication included in the set of uplink beam indications, for indicating downlink spatial relation information for reception or for indicating downlink QCL assumption information.
  • FIG. 8 The number and arrangement of components shown in Figure 8 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Figure 8. Furthermore, two or more components shown in Figure 8 may be implemented within a single component, or a single component shown in Figure 8 may be implemented as multiple, distributed components. Additionally or alternatively, a set of (one or more) components shown in Figure 8 may perform one or more functions described as being performed by another set of components shown in Figure 8.
  • FIG. 9 is a block diagram of an example apparatus 900 for wireless communication.
  • the apparatus 900 may be a BS (such as the BS 110 depicted in, and described in connection with, Figures 1–8) , or a BS may include the apparatus 900.
  • the apparatus 900 includes a reception component 902 and a transmission component 904, which may be in communication with one another (for example, via one or more buses or one or more other components) .
  • the apparatus 900 may communicate with another apparatus 906 (such as a UE, a base station, or another wireless communication device) using the reception component 902 and the transmission component 904.
  • the apparatus 900 may include one or more of a beam management component 908, or a communication component 910, among other examples.
  • the apparatus 900 may be configured to perform one or more operations described herein. Additionally or alternatively, the apparatus 900 may be configured to perform one or more processes described herein, such as process 700 of Figure 7, or a combination thereof.
  • the apparatus 900 or one or more components shown in Figure 9 may include one or more components of the BS described above in connection with Figure 2. Additionally, or alternatively, one or more components shown in Figure 9 may be implemented within one or more components described above in connection with Figure 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.
  • the reception component 902 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 906.
  • the reception component 902 may provide received communications to one or more other components of the apparatus 900.
  • the reception component 902 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 906.
  • the reception component 902 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the BS described above in connection with Figure 2.
  • the reception component 902 may include an interface with a processing system of the apparatus 900 (for example, the first interface of the BS 110 described herein in connection with Figure 2) .
  • the reception component 902 may be configured to obtain or receive information via the interface.
  • the transmission component 904 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 906.
  • one or more other components of the apparatus 906 may generate communications and may provide the generated communications to the transmission component 904 for transmission to the apparatus 906.
  • the transmission component 904 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 906.
  • the transmission component 904 may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the BS described above in connection with Figure 2. In some aspects, the transmission component 904 may be collocated with the reception component 902 in a transceiver. In some aspects, the transmission component 904 may include an interface with a processing system of the apparatus 900 (for example, the second interface of the BS 110 described herein in connection with Figure 2) . The transmission component 904 may be configured to output or transmit information via the interface.
  • the beam management component 908 may determine, for use in an SFN, at least one of a set of uplink beam indications or a set of downlink beam indications.
  • the beam management component 908 may include a receive processor, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, a processing system, or a combination thereof, of the BS described above in connection with Figure 2.
  • the transmission component 904 may transmit, to a UE, an indication of at least one of the set of uplink beam indications or the set of downlink beam indications.
  • the communication component 910 may communicate, with the UE in the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the communication component 910 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the BS described above in connection with Figure 2.
  • the communication component 910 may cause the reception component 902 to receive a communication, from the UE in the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the communication component 910 may cause the transmission component 904 to transmit a communication, to the UE in the SFN, using at least one beam indicated by the set of uplink beam indications or one beam indicated by the set of downlink beam indications.
  • the transmission component 904 may transmit an indication that a set of beams indicated by the set of uplink beam indications or a set of beams indicated by the set of downlink beam indications are associated with a same antenna port of the UE.
  • the transmission component 904 may transmit an indication that a set of beams indicated by the set of uplink beam indications or a set of beams indicated by the set of downlink beam indications are associated with at least one of a communication channel or a reference signal.
  • the transmission component 904 may transmit transmitting an indication that a set of beams indicated by the set of uplink beam indications are associated with at least one of PUCCH DMRSs, PUSCH DMRSs, PRACH communications, or SRSs.
  • the transmission component 904 may transmit an indication of the set of uplink beam indications including at least one of spatial relation information associated with the set of uplink beam indications, an uplink TCI state associated with the set of uplink beam indications, or a joint downlink and uplink TCI state associated with the set of uplink beam indications.
  • the transmission component 904 may transmit an indication of one or more source reference signals, for each uplink beam indication included in the set of uplink beam indications, for indicating uplink spatial relation information for transmission.
  • the transmission component 904 may transmit an indication of one or more transmission parameters associated with the set of uplink beam indications.
  • the transmission component 904 may transmit an indication of one or more transmission parameters for each uplink beam indication included in the set of uplink beam indications.
  • the transmission component 904 may transmit an indication of one or more uplink transmission types or one or more uplink transmission resources associated with the set of uplink beam indications.
  • the transmission component 904 may transmit an indication of one or more CCs associated with at least one of the set of uplink beam indications or the set of downlink beam indications.
  • the transmission component 904 may transmit, via an RRC configuration, an indication of one or more CC lists, where the one or more CCs are associated with a CC list.
  • the transmission component 904 may transmit the indication of at least one of the set of uplink beam indications or the set of downlink beam indications on a CC that is included in a CC list.
  • the transmission component 904 may transmit an indication that a set of beams indicated by the set of downlink beam indications are associated with at least one of PDCCH DMRSs, PDSCH DMRSs, CSI-RSs, or PRSs.
  • the transmission component 904 may transmit an indication of one or more downlink transmission types or one or more downlink transmission resources associated with the set of downlink beam indications.
  • the transmission component 904 may transmit the set of downlink beam indications including at least one of a downlink TCI state associated with the set of downlink beam indications, or a joint downlink and uplink TCI state associated with the set of downlink beam indications.
  • the transmission component 904 may transmit an indication of one or more source reference signals, for each downlink beam indication included in the set of uplink beam indications, for indicating downlink spatial relation information for reception or for indicating downlink QCL assumption information.
  • FIG. 9 The number and arrangement of components shown in Figure 9 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Figure 9. Furthermore, two or more components shown in Figure 9 may be implemented within a single component, or a single component shown in Figure 9 may be implemented as multiple, distributed components. Additionally or alternatively, a set of (one or more) components shown in Figure 9 may perform one or more functions described as being performed by another set of components shown in Figure 9.
  • the term "component” is intended to be broadly construed as hardware, firmware, or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, or a combination of hardware and software.
  • the phrase “based on” is intended to be broadly construed to mean “based at least in part on. " As used herein, satisfying a threshold may refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold, among other examples.
  • a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. As an example, "at least one of: a, b, or c" is intended to cover: a, b, c, a-b, a-c, b-c, and a-b-c.
  • the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more.
  • the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more.
  • the terms “set” and “group” are intended to include one or more items (for example, related items, unrelated items, or a combination of related and unrelated items) , and may be used interchangeably with “one or more. " Where only one item is intended, the phrase “only one” or similar language is used.
  • the terms “has, “ “have, “ “having, “ and similar terms are intended to be open-ended terms.
  • the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or, " unless explicitly stated otherwise (for example, if used in combination with “either” or “only one of” ) .
  • the hardware and data processing apparatus used to implement the various illustrative logics, logical blocks, modules and circuits described in connection with the aspects disclosed herein may be implemented or performed with a general purpose single-or multi-chip processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein.
  • a general purpose processor may be a microprocessor, or any conventional processor, controller, microcontroller, or state machine.
  • a processor also may be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • particular processes and methods may be performed by circuitry that is specific to a given function.
  • the functions described may be implemented in hardware, digital electronic circuitry, computer software, firmware, including the structures disclosed in this specification and their structural equivalents thereof, or in any combination thereof.
  • aspects of the subject matter described in this specification also can be implemented as one or more computer programs (such as one or more modules of computer program instructions) encoded on a computer storage media for execution by, or to control the operation of, a data processing apparatus.
  • Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program from one place to another.
  • a storage media may be any available media that may be accessed by a computer.
  • such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that may be used to store desired program code in the form of instructions or data structures and that may be accessed by a computer.
  • Disk and disc includes compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media. Additionally, the operations of a method or algorithm may reside as one or any combination or set of codes and instructions on a machine readable medium and computer-readable medium, which may be incorporated into a computer program product.

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

Abstract

La présente divulgation concerne des systèmes, des procédés et des appareils pour des indications de faisceau dans un réseau à fréquence unique (SFN). Selon un aspect, un équipement utilisateur (UE) peut être doté d'un ensemble d'indications de faisceau de liaison montante multiples pour un SFN et d'un ensemble d'indications de faisceau de liaison descendante multiples pour le SFN. L'ensemble d'indications de faisceau de liaison montante multiples et l'ensemble d'indications de faisceau de liaison descendante multiples peuvent être indiqués pour le même port d'antenne de l'UE pour un ou plusieurs canaux de communication (par exemple, des canaux de données ou des canaux de commande) ou un ou plusieurs signaux de référence (par exemple, des signaux de référence de démodulation (DMR), des signaux de référence de sondage (SRS), des signaux de référence d'informations d'état de canal (CSI-RS) ou des signaux de référence de positionnement (PRS)). Par conséquent, l'UE et une station de base (BS) peuvent réduire la signalisation et le surdébit de réseau associés aux indications de faisceau dans le SFN.
PCT/CN2020/114698 2020-09-11 2020-09-11 Indications de faisceau pour un réseau à fréquence unique (sfn) Ceased WO2022052027A1 (fr)

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WO2024168557A1 (fr) * 2023-02-14 2024-08-22 北京小米移动软件有限公司 Procédé et dispositif de détermination d'état d'indication de configuration de transmission, procédé et dispositif de configuration d'état d'indication de configuration de transmission, et support de stockage
WO2024168558A1 (fr) * 2023-02-14 2024-08-22 北京小米移动软件有限公司 Procédé, appareil et dispositif de configuration d'état d'indication de configuration de transmission et support de stockage

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WO2024168557A1 (fr) * 2023-02-14 2024-08-22 北京小米移动软件有限公司 Procédé et dispositif de détermination d'état d'indication de configuration de transmission, procédé et dispositif de configuration d'état d'indication de configuration de transmission, et support de stockage
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