Low latency physical downlink control channel and physical downlink shared channel

    公开(公告)号:AU2017311316B2

    公开(公告)日:2021-07-22

    申请号:AU2017311316

    申请日:2017-08-09

    Applicant: QUALCOMM INC

    Abstract: Methods, systems, and devices for wireless communication are described. A base station may indicate time and frequency resources for a low latency physical downlink control channel (sPDCCH), which may be different from another physical downlink control channel (PDCCH), to a user equipment (UE). The base station may then transmit a common sPDCCH (CsPDCCH) message to indicate which low latency control channel elements (sCCEs) are used for sPDCCH transmission during a given subframe. In some cases, the signaling used to indicate the initial resource allocation for sPDCCH may be infrequent relative to the CsPDCCH transmissions. If some of the resources initially allocated for sPDCCH are not actually used for sPDCCH during a subframe, the base station and the UE may use those resources for communicating data. For example, the base station may transmit data using a low latency physical downlink shared channel (sPDSCH) to the UE using those resources.

    ACKNOWLEDGMENT FEEDBACK TECHNIQUES IN WIRELESS COMMUNICATIONS

    公开(公告)号:SG11202103817YA

    公开(公告)日:2021-06-29

    申请号:SG11202103817Y

    申请日:2019-11-28

    Applicant: QUALCOMM INC

    Abstract: Methods, systems, and devices for wireless communications are described that provide for unambiguous mapping between downlink control channel transmissions, downlink shared channel transmissions, and uplink acknowledgment feedback resources. The uplink acknowledgment feedback resource may be located within a same transmission time interval (TTI). A base station may configure codebook-based acknowledgment resources from a user equipment (UE), and feedback delay values may be associated with time domain resources of the downlink shared channel transmissions. In some examples, feedback delay values may be associated with particular search spaces or monitoring occasions of the downlink control channel transmissions that include resource allocations for the downlink shared channel transmissions. A UE using codebook-based acknowledgment feedback resources may thus unambiguously identify uplink resources that are to be used for transmitting the uplink acknowledgment feedback.

    PHYSICAL LAYER AND MAC LAYER UPLINK CHANNEL PRIORITIZATION

    公开(公告)号:SG11202102161QA

    公开(公告)日:2021-04-29

    申请号:SG11202102161Q

    申请日:2019-10-08

    Applicant: QUALCOMM INC

    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may select a first communication, associated with a first traffic type, or a second communication, associated with a second traffic type, as a selected communication for transmission in an overlapping resource, wherein the first communication and the second communication at least partially overlap in time, and wherein the selection is performed based at least in part on a rule; and transmit the selected communication. Numerous other aspects are provided.

    UPLINK PREEMPTION INDICATION
    64.
    发明专利

    公开(公告)号:SG11202101523TA

    公开(公告)日:2021-04-29

    申请号:SG11202101523T

    申请日:2019-09-25

    Applicant: QUALCOMM INC

    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station in wireless communication with the UE, an allocation of time and frequency resources for an uplink transmission of a first communication type associated with a threshold reliability or latency metric. The UE may monitor a control channel for an uplink preemption indication from the base station, the uplink preemption indication indicating whether the UE should transmit the uplink transmission using the first communication type associated with the threshold reliability or latency metric. The UE may then process the uplink transmission based on monitoring the control channel for the uplink preemption indication.

    RATE-MATCHING AROUND CRS FOR NR-TDD

    公开(公告)号:SG11202100049XA

    公开(公告)日:2021-02-25

    申请号:SG11202100049X

    申请日:2019-08-12

    Applicant: QUALCOMM INC

    Abstract: Rate-matching and channel estimation are disclosed for new radio (NR) user equipments (UEs). An NR UE obtains coexistence information of neighboring legacy operations including common reference signal (CRS) ports, CRS frequency pattern, and a legacy subframe type corresponding to the NR transmission segments. The NR UE determines legacy CRS occasion(s) coinciding with shared downlink direction operations for the NR and legacy operations, and rate-matches reception of NR downlink transmissions around the CRS occasion(s). In other aspects, an NR UE detects overlap of a downlink signal with downlink control channel candidate of a configured control resource set (CORESET). The UE ends monitoring of the candidate within a search space of the CORESET in response to the detected overlap, detects a collision between a scheduled demodulation reference signal (DMRS) and the downlink signal occasion, and discards all or part of the CORESET.

    REPETITION-BASED TRANSMISSION
    67.
    发明专利

    公开(公告)号:SG11202010014XA

    公开(公告)日:2020-11-27

    申请号:SG11202010014X

    申请日:2019-05-10

    Applicant: QUALCOMM INC

    Abstract: Methods, systems, and devices for wireless communications are described. In some wireless communications systems, devices may implement transmission repetitions for transport blocks (TBs) to improve reception reliability. However, to support low latency, TBs may be transmitted in any transmission time interval (TTI) within a subframe. The systems may implement process to handle these TB repetitions. In some cases, a device may receive, during a TTI of a subframe, control information including an indication of transmission repetitions of a TB for a plurality of TTIs, identify a quantity of transmission repetitions of the TB based on the control information, and monitor for the transmission repetitions of the TB.

    TRANSPORT BLOCK SIZE DETERMINATION FOR A TRANSMISSION TIME INTERVAL

    公开(公告)号:SG11202009086TA

    公开(公告)日:2020-10-29

    申请号:SG11202009086T

    申请日:2019-04-09

    Applicant: QUALCOMM INC

    Abstract: Methods, systems, and devices for wireless communications are described. One method may include a user equipment (UE) determining whether it is configured to support a modulation scheme such as, a quadrature-amplitude-modulation (QAM). The UE may identify a plurality of transport block size (TBS) values based on whether the UE is configured with the modulation scheme, and identify a scaled TBS value that is based on a length of a transmission time interval (TTI). The UE may map the scaled TBS value to a TBS value of a plurality of TBS values (e.g., a plurality of TBS value options). As such, the UE may communicate, with a base station during the TTI, data on a transport block having a size corresponding to the mapped TBS value.

    SPDCCH reuse indication constraint under DMRS sharing

    公开(公告)号:AU2019220699A1

    公开(公告)日:2020-08-20

    申请号:AU2019220699

    申请日:2019-02-15

    Applicant: QUALCOMM INC

    Abstract: Methods, systems, and devices for wireless communications are described. A wireless device such as a user equipment (UE) may receive a first downlink shared channel transmission over a first set of frequency resources in a first transmission time interval (TTI); receive a downlink control transmission including a grant of a second set of frequency resources of a second TTI for a second downlink shared channel transmission, the downlink control transmission including an indication that a demodulation reference signal of the first downlink shared channel transmission is reused for the second downlink shared channel transmission; determine to rate match the second downlink shared channel transmission around resources of the second set of frequency resources that are not part of the first set of frequency resources, and receive the second downlink shared channel transmission over a subset of the second set of frequency resources.

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