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    CLEAR CHANNEL ASSESSMENT PROCEDURE AT MASTER AND SLAVE DEVICES
    112.
    发明专利
    CLEAR CHANNEL ASSESSMENT PROCEDURE AT MASTER AND SLAVE DEVICES 未知

    公开(公告)号：CA2981897C

    公开(公告)日：2021-03-09

    申请号：CA2981897

    申请日：2016-05-13

    Applicant: QUALCOMM INC

    Inventor： PAPALEO MARCO ,  YERRAMALLI SRINIVAS ,  DAMNJANOVIC ALEKSANDAR ,  LUO TAO ,  GAAL PETER ,  MALLADI DURGA PRASAD

    IPC: H04W74/08 ,  H04W72/12

    Abstract: In order to provide a generic access rule, the present disclosure proposes a new potential set of adaptivity rules for LBE based on LBT. The generic access rule of the present disclosure provides LTE-U and Wi-Fi coexistence and DL/ UL coexistence in both LTE-U and Wi-Fi. The apparatus receives, from the first master device, a resource allocation for communicating with the second master device. The apparatus also determines a type of CCA procedure to perform before communicating with the second master device on an unlicensed channel. The apparatus further performs a CCA procedure to obtain a transmission opportunity based on the determining, the CCA procedure being one of an ICCA procedure or an ECCA procedure. In addition, the apparatus transmit data to the second master device in accordance with the resource allocation on the unlicensed channel when the transmission opportunity is obtained.

    Enhanced licensed assisted access uplink channel access
    115.
    发明专利
    Enhanced licensed assisted access uplink channel access 未知

    公开(公告)号：AU2016348310B2

    公开(公告)日：2021-01-28

    申请号：AU2016348310

    申请日：2016-10-28

    Applicant: QUALCOMM INC

    Inventor： YERRAMALLI SRINIVAS ,  LUO TAO ,  ZHANG XIAOXIA ,  GAAL PETER

    IPC: H04W74/00 ,  H04W74/02 ,  H04W74/08

    Abstract: Solutions to problems from delays in channel acquisition by UEs in a contention- based shared radio frequency spectrum band are disclosed. For example, if an eNB knows of a recent or ongoing downlink transmission on a frequency to be used for uplink transmission by a UE, then the eNB may instruct the UE to either skip performance of LBT on that frequency or else perform a type of LBT that is shorter in duration than a full CCA. One way for the eNB to instruct the UE in this fashion is to set an indicator in an uplink grant transmitted to the UE on another frequency. Additionally, in order to avoid truncation of an uplink transmission opportunity, an eNB may notify a UE that an uplink grant is valid for more than one starting point.

    Improvements on co-channel sidelink LTE V2V and DSRC communication
    116.
    发明专利
    Improvements on co-channel sidelink LTE V2V and DSRC communication 未知

    公开(公告)号：AU2017237734B2

    公开(公告)日：2020-07-23

    申请号：AU2017237734

    申请日：2017-02-27

    Applicant: QUALCOMM INC

    Inventor： JIANG LIBIN ,  PATIL SHAILESH ,  GAAL PETER ,  YERRAMALLI SRINIVAS

    IPC: H04W74/08 ,  H04L47/27

    Abstract: Improvement in co-existence of the LTE device-to-device communication with another device-to-device communication method is desired. The apparatus selects a countdown number within a size of a contention window including a plurality of slots before a target subframe. The apparatus determines whether each slot of the plurality of slots is idle or utilized while waiting for the target subframe. The apparatus counts down the countdown number during each of the determined idle slots. The apparatus determines whether the countdown number has reached a threshold number before the target subframe. The apparatus performs, when the countdown number is determined to have reached the threshold number, one of: deferring from transmitting until the target subframe, or transmitting a CUBS until a next subframe or the target subframe.

    Handling resumption of transmissions and LBT performance in 3GPP multi-carrier eLAA, license-assisted access
    117.
    发明专利
    Handling resumption of transmissions and LBT performance in 3GPP multi-carrier eLAA, license-assisted access 未知

    公开(公告)号：AU2017332357B2

    公开(公告)日：2020-07-16

    申请号：AU2017332357

    申请日：2017-09-21

    Applicant: QUALCOMM INC

    Inventor： YERRAMALLI SRINIVAS ,  GAAL PETER

    IPC: H04W74/08

    Abstract: Handling uplink transmissions by UEs in unlicensed carrier components, in the context of 3GPP eLAA, enhanced license assisted access, and in particular, the configuration by the eNodeB of multi-carrier LBT, Listen Before Transmit, is discussed. The eNodeB signals together with the Uplink grant the LBT procedure to be used before transmitting in uplink, either a short, Category 2 LBT procedure, or else a longer, category 4 LBT procedure. The eNodeB signals, for a particular carrier component, the same LBT procedure it has used itself to sense and then securing the carrier. Also, when pauses occur during the uplink transmission on contention-based shared channels involved in eLAA communications, various procedures may be used to restart transmissions on the contention-based shared channels on the uplink when the original channel occupancy was reserved by a serving base station.

    Discovery reference signal configuration and scrambling in licensed-assisted access
    118.
    发明专利
    Discovery reference signal configuration and scrambling in licensed-assisted access 未知

    公开(公告)号：AU2016348135B2

    公开(公告)日：2020-06-18

    申请号：AU2016348135

    申请日：2016-09-21

    Applicant: QUALCOMM INC

    Inventor： YERRAMALLI SRINIVAS ,  GAAL PETER ,  LUO TAO ,  CHEN WANSHI

    IPC: H04W48/16

    Abstract: The disclosure provides for receiving a downlink transmission for wireless communications. A user equipment (UE) may receive, on a primary component carrier, an indication that a subframe of a secondary component carrier includes a discovery reference signal. During the subframe, the UE may receive, on the secondary component carrier over an unlicensed spectrum, a transmission including the discovery reference signal. The UE may rate match the transmission based on the indication. The disclosure further provides for discovering timing information during wireless communications. The UE may receive on a primary component carrier, an indication that a set of subframes of a carrier of a neighboring cell includes a discovery reference signal. The UE may determine a subframe to receive the discovery reference signal based on the indication. The UE may receive during the subframe, the discovery reference signal from the neighboring cell in an unlicensed spectrum.

    Timing information for discovery in unlicensed spectrum
    119.
    发明专利
    Timing information for discovery in unlicensed spectrum 未知

    公开(公告)号：AU2016211216B2

    公开(公告)日：2020-05-28

    申请号：AU2016211216

    申请日：2016-01-29

    Applicant: QUALCOMM INC

    Inventor： YERRAMALLI SRINIVAS ,  LUO TAO ,  DAMNJANOVIC ALEKSANDAR ,  GAAL PETER

    IPC: H04W48/08 ,  H04W74/08

    Abstract: Apparatus and methods for transmitting and discovering timing information during wireless communications are described herein. In an aspect, the systems and methods include monitoring at a user equipment (UE) over an unlicensed radio frequency spectrum band for a discovery signal from a network entity; receiving the discovery signal during a subframe from the network entity; and determining a current subframe location of the network entity based on the discovery signal, wherein the discovery signal includes timing information corresponding to the current subframe location.

    LTE CHANNEL ACCESS OVER UNLICENSED BANDS
    120.
    发明专利
    LTE CHANNEL ACCESS OVER UNLICENSED BANDS 未知

    公开(公告)号：ZA201807492B

    公开(公告)日：2020-02-26

    申请号：ZA201807492

    申请日：2018-11-08

    Applicant: QUALCOMM INC

    Inventor： YERRAMALLI SRINIVAS ,  LUO TAO ,  BHUSHAN NAGA ,  GAAL PETER

    Abstract: Methods, systems, and devices are described for wireless communications. In one method, a clear channel assessment (CCA) may be performed at a base station to determine availability of an unlicensed spectrum. A first waveform may be transmitted to a set of user equipments (UEs) over the unlicensed spectrum when available. The first waveform may indicate a first time period and a second time period during which the base station has channel access over the unlicensed spectrum. A second waveform may be received from one or more UEs responsive to the first waveform. Each second waveform may be received over the unlicensed spectrum during the first time period and may indicate that the respective UE has channel access over the unlicensed spectrum to receive data from the base station during the second time period.

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