Contention window adjustment mechanisms for FELAA systems

    公开(公告)号:US11659592B2

    公开(公告)日:2023-05-23

    申请号:US16250360

    申请日:2019-01-17

    Applicant: APPLE INC.

    Abstract: An apparatus of a Fifth Generation NodeB (gNB) to operate in a License Assisted Access (LAA) system configures a transmission initiation time interval contention window size (CWS) of N number of subframes between Category 4 Listen Before Talk (LBT) uplink (UL) transmissions by a user equipment (UE) operating in the LAA system, and a memory to store a value of N which can have a value 6 or greater or 10 or greater. An apparatus of a UE to operate in an LAA system decodes a configuration from the gNB of a transmission initiation time interval contention CWS of N number of subframes between Category 4 LBT UL transmissions in the LAA system. The CWS is increased to a next higher value when an UL grant or an autonomous UL (AUL) downlink feedback indicator (DFI) is not received before the expiration of a timer.

    Mechanisms To Operate Downlink Wideband Carrier in Unlicensed Band

    公开(公告)号:US20220174739A1

    公开(公告)日:2022-06-02

    申请号:US17441532

    申请日:2020-05-01

    Applicant: Apple Inc.

    Abstract: Systems, devices, and techniques for listen-before-talk (LBT) operations in unlicensed spectrum are described. A described technique includes receiving, by a user equipment (UE), a downlink control information (DCI) message, the DCI message including available bandwidth information and a channel occupancy time (COT) duration, the available bandwidth information being associated with one or more LBT bandwidths of a bandwidth part (BWP) in unlicensed spectrum; receiving, by the UE, one or more physical downlink shared channel (PDSCH) transmissions in the BWP, during the COT duration; and processing the one or more PDSCH transmissions based on the available bandwidth information.

    Cell specific reference signal (CRS) muting for even further enhanced machine type communication (EFEMTC)

    公开(公告)号:US11343052B2

    公开(公告)日:2022-05-24

    申请号:US16487226

    申请日:2018-03-22

    Applicant: Apple Inc.

    Abstract: A network device such as an evolved NodeB (eNB) or next generation NodeB (gNB) can configure a set of user equipment (UE) for cell reference signal (CRS) muting in order to provide better channel quality and power efficiency in communications. Where an eNB mutes CRS transmissions that are not needed by any UE, an improvement in downlink throughput and reduce connection drop rate can be generated. A CRS muting capability can be determined based on a user equipment (UE) capability information. According to the CRS muting capability of a UE, CRS muting can be generated in a physical channel outside of a narrow band (NB) or a wide band (WB) plus/minus X physical resource blocks (PRBs), wherein X is a non-negative integer, based on the CRS muting capability.

    Semi-persistent scheduling for autonomous transmission activation and release

    公开(公告)号:US11317398B2

    公开(公告)日:2022-04-26

    申请号:US16995693

    申请日:2020-08-17

    Applicant: Apple Inc.

    Abstract: Described is an apparatus of a User Equipment (UE). The apparatus may comprise a first circuitry and a second circuitry. The first circuitry may be operable to process a first Downlink Control Information (DCI) format 0A transmission indicating a semi-persistent scheduling (SPS) activation. The first circuitry may also be operable to process a second DCI format 0A transmission indicating an SPS release. The second circuitry may be operable to generate one or more Uplink (UL) transmissions for an unlicensed spectrum of the wireless network after the SPS activation and before the SPS release in accordance with a configured schedule.

    Maximum channel occupancy time sharing and co-existence

    公开(公告)号:US11310813B2

    公开(公告)日:2022-04-19

    申请号:US16490260

    申请日:2018-04-02

    Applicant: Apple Inc.

    Abstract: Described is an apparatus of an Evolved Node-B (eNB) operable to communicate with a User Equipment (UE) on a wireless network. The apparatus may comprise a first circuitry, a second circuitry, and a third circuitry. The first circuitry may be operable to process one or more configuration transmissions from the eNB carrying one or more parameters for Grantless Uplink (GUL) transmission. The second circuitry may be operable to determine one or more GUL subframes of an acquired Maximum Channel Occupancy Time (MCOT) on time-domain resources allocated for GUL transmission from the UE. The third circuitry may be operable to generate a GUL transmission during the one or more GUL subframes of the acquired MCOT in accordance with the one or more parameters for GUL transmission.

    Unlicensed band IoT systems
    70.
    发明授权

    公开(公告)号:US11109447B2

    公开(公告)日:2021-08-31

    申请号:US16451292

    申请日:2019-06-25

    Applicant: Apple Inc.

    Abstract: Systems and methods of using a frame structure by a NB-IoT UE are described, The UE receives an anchor segment on an anchor channel and a data segment on a data channel both in an unlicensed spectrum. If a 3N1 frame structure is used: a NPSS, NSSS and NPBCH are in a highest index anchor carrier of contiguous anchor carriers and SIB in a lowest index anchor carrier, and if a 3N2 frame structure is used a single narrowband carrier comprising the NPSS, NSSS, NPBCH and SIB. The data channel is a FHSS single carrier other than the anchor carriers if the 3N1 frame structure is used and the single narrowband carrier if the 3N2 frame structure is used. A NPDCCH or NPDSCH is received on a middle index anchor carrier or in the data segment. The NPSS overrides a TDD configuration indicated by the eNB.

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