Dynamic Configuration of Aperiodic Sounding Reference Signal Offsets in Cellular Communications Systems

    公开(公告)号:US20220303088A1

    公开(公告)日:2022-09-22

    申请号:US17439059

    申请日:2020-10-12

    Applicant: Apple Inc.

    Abstract: A cellular base station (BS) which determines an aperiodic sounding reference signal (SRS) triggering offset configuration specifying an offset between an aperiodic SRS trigger received by a user equipment (UE) and transmission of the SRS by the UE. The cellular base station may determine that the SRS triggering offset should be adjusted. In response, the cellular base station may transmit signaling to the UE specifying a new value for the aperiodic SRS triggering offset. The new SRS triggering offset value may be partly based on a minimum timing offset for the UE and may be contained in a medium access control (MAC) control element (CE) or in downlink control information (DCI). Additionally, the new triggering offset value may be applicable for a plurality of component carriers or bandwidth parts. The cellular base station may also determine a new triggering offset value due to conflicts regarding the AP-SRS transmission.

    Cross-Cell Beam Failure Recovery
    93.
    发明申请

    公开(公告)号:US20220302986A1

    公开(公告)日:2022-09-22

    申请号:US17442108

    申请日:2020-08-04

    Applicant: Apple Inc.

    Abstract: This disclosure relates to performing beam failure recovery during an inter-cell connection involving a UE in communication with one or more base stations in a cellular communication system. In various embodiments, a user equipment determines one or more beam failures by monitoring one or more reference signals transmitted by one or more base stations, where the UE is connected to the one or more base stations. The UE further performs candidate beam detection by monitoring at least one candidate reference signal that is transmitted by one or more candidate base stations, where at least one candidate base station (a first candidate base station) is different from the one or more base stations to which the UE was previously communicating. The UE selects the first candidate base station based on the candidate beam detection, and transmits a beam failure recovery request (BFRQ) message to the first candidate base station based on the selection.

    Methods and Apparatus for PRACH Resource Determination and RA-RNTI Computation in Wireless Communication

    公开(公告)号:US20220225416A1

    公开(公告)日:2022-07-14

    申请号:US17456304

    申请日:2021-11-23

    Applicant: Apple Inc.

    Abstract: Aspects herein relate to wireless devices, circuits, and methods for determining a PRACH resource mapping comprising a starting symbol position within a reference slot, wherein the starting symbol position is determined based, at least in part, on a subcarrier spacing configuration of PRACH resources of a wireless network that a wireless device is operating on; and using the radio to transmit a RACH preamble and an associated RA-RNTI via the determined PRACH resource mapping. Further aspects herein relate to devices, circuits, and methods for using a modified RA-RNTI for transmission or reception of data over a wireless network, wherein the wireless network has a subcarrier spacing configuration of PRACH resources, wherein a size of the subcarrier spacing configuration of the PRACH resources causes out-of-range RA-RNTI values to be calculated using a legacy RA-RNTI equation in an unmodified form, wherein the range of permissible RA-RNTI values is from 0 to 216−1.

    Time advance adjustment delay for shortened transmission time interval under carrier aggregation or dual connectivity

    公开(公告)号:US11375524B2

    公开(公告)日:2022-06-28

    申请号:US16462877

    申请日:2018-08-01

    Applicant: APPLE INC.

    Abstract: Systems and methods are provided for handling different timing advance (TA) adjustment delays corresponding to different transmission time intervals (TTIs) from different serving cells under carrier aggregation or dual connectivity. A user equipment (UE) selects and implements one TA adjustment delay even if two or more serving cells transmit with different TTIs. In one embodiment, the UE uses a predetermined TA adjustment delay for each of a plurality of TA commands received from serving cells with different TTI lengths. In another embodiment, the UE uses a TA adjustment delay that is a maximum value of the TA adjustment delays for the TTIs from the different serving cells.

    MEASUREMENT GAP PATTERN USE AND MANAGEMENT FOR WIRELESS COMMUNICATION SYSTEMS

    公开(公告)号:US20220182867A1

    公开(公告)日:2022-06-09

    申请号:US17440675

    申请日:2020-05-01

    Applicant: Apple Inc.

    Abstract: A user equipment (UE) device is configured for performing a signal measurement for wireless communication in a new radio (NR) network. The UE is configured to determine a frequency range (FR) of a serving cell configured to send a signal that is measured by the UE using a signal measurement. The UE configures a measurement gap (MG) pattern to perform the signal measurement. Configuring the measurement gap includes determining that the frequency range of the serving cell includes frequencies of a second frequency range (FR2), determining that a measurement object (MO) configuration for the FR2 is available, setting a measurement gap repetition periodicity (MGRP) value for the signal measurement, and setting a measurement gap length (MGL) value for the signal measurement. The UE performs a signal measurement using the MGRP value and the MGL value.

    DEVICES FOR PER-CC MEASUREMENT GAP CONFIGURATION

    公开(公告)号:US20210360729A1

    公开(公告)日:2021-11-18

    申请号:US16479856

    申请日:2018-01-31

    Applicant: Apple Inc.

    Inventor: Candy Yiu Yang Tang

    Abstract: Devices, methods, user equipment (UE), core network devices, base stations, and storage media are provided for per-component carrier (CC) and network controlled small gap (ncsg) measurement gap configuration. In one embodiment, processing circuitry of a UE decodes an RRCConnectionReconfiguration communication from a base station, the RRCConnectionReconfiguration communication comprising a measure gap configuration (MeasGapConfig) information element, the MeasGapConfig information element comprising a gap offset field (gapOffset) indicating one or more gap offset gap patterns, the one or more gap offset gap patterns (gp) comprising at least a first network-controlled small-gap (ncsg) gap pattern (gp-ncsg). Information from this communication is used to set up a measurement gap configuration indicated by the MeasGapConfig information element in accordance with the gapOffset. Other embodiments involve other information for various combinations of per-CC and ncsg gap configurations.

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