Sounding Reference Signal Based Downlink Transmission Configuration Indication

    公开(公告)号:US20220360398A1

    公开(公告)日:2022-11-10

    申请号:US17760551

    申请日:2019-09-29

    Applicant: Apple Inc.

    Abstract: To reduce the beam reporting latency, a base station may include a sounding reference signal (SRS) indication to a wireless communication device (UE) as part of the transmission configuration information (TCI) transmitted to the UE, allowing the UE to receive a corresponding downlink signal using the same beam (or with the same beam) the UE used to transmit (or with which the UE transmitted) the SRS indicated in the TCI. The SRS may be one of multiple SRSs previously transmitted by the UE. The UE may transmit the multiple SRSs periodically and/or according to semi-persistent scheduling, or it may transmit them aperiodically. Therefore, the UE does not need to report the beam quality, and the base station may perform the necessary beam measurement(s) instead. Various parameters and conditions may be defined for the UE to support SRS-based TCI.

    Accumulation of PUCCH Repetitions to Increase the Reliability of PUCCH Reception

    公开(公告)号:US20220353859A1

    公开(公告)日:2022-11-03

    申请号:US17437756

    申请日:2020-10-02

    Applicant: Apple Inc.

    Abstract: A base station (BS) may receive a plurality of repetitions of a Physical Uplink Control Channel (PUCCH) from a user equipment (UE), and accumulate the received repetitions to obtain a resultant signal. The ability to accumulate repetitions enables the base station to experience a higher probability of successful recovery of the PUCCH payload bits than if decoding were based on the reception of a non-repeated transmission of the PUCCH. The base station may configure the number of repetitions, the temporal gap between the repetitions, and mode of repetition of the PUCCH. In an intra-slot mode, more than one copy may be received from each configured slot, with or without frequency hopping. In an inter-slot mode, one copy is received per configured slot. Different repetitions may be transmitted by the UE in different directions, according to a spatial consistency pattern.

    Power Saving for User Equipment Through Sidelink Scheduling Offloading

    公开(公告)号:US20220322230A1

    公开(公告)日:2022-10-06

    申请号:US17438905

    申请日:2020-10-21

    Applicant: Apple Inc.

    Abstract: A user equipment (UE) configured to transmit a scheduling request (SR) to a second UE which causes the second UE to determine a set of sidelink transmission resources for use by the UE. The UE may then receive information regarding a determined set of sidelink transmission resources from the second UE and then transmit sidelink communications using at least a subset of the determined set of sidelink transmission resources. The determined set of sidelink transmission resources may be recommended and reserved or non-reserved resources. The UE may transmit configuration information concerning transmission resources to the second UE to be used in transmitting, the SR. The second UE may monitor the channel for arrival of the resources. The SR may be encoded as a cyclic shift of the SR corresponding to an ACK-only sequence, an ACK/NACK sequence, or a certain sequence of the SR based on a configuration index.

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