SYNCHRONIZATION SIGNALS FOR LICENSE ASSISTED ACCESS

    公开(公告)号:US20180316453A1

    公开(公告)日:2018-11-01

    申请号:US15771868

    申请日:2015-12-23

    Abstract: Systems, apparatus, user equipment (UE), evolved node B (eNB), computer readable media, and methods are described for license assisted access (LAA) communications on an unlicensed channel. The eNB determines if a subframe to be transmitted is a partial subframe, and if the subframe is not a partial subframe, constructs the subframe to contain both a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) at fixed symbol positions within the subframe. In further embodiments, the eNB determines if a last subframe of a downlink (DL) transmission burst to be transmitted is a partial subframe, and if the subframe is not a partial subframe, constructs the subframe to contain a discovery reference signal (DRS) for transmission.

    SYSTEMS, METHODS AND DEVICES FOR SHARING A WIRELESS MEDIUM USING LISTEN BEFORE TALK

    公开(公告)号:US20180206269A1

    公开(公告)日:2018-07-19

    申请号:US15742388

    申请日:2015-12-21

    Abstract: Licensed assisted access (LAA) uplink (UL) transmissions can be performed using UL scheduling, enhanced node B (eNB) listen before talk (LBT), and user equipment (UE) LBT. A scheduling of a UE for UL transmission can include different procedures for a UE to perform LBT before UL transmission. These procedures can be classified as: i) a scheduled UE performing no LBT for UL transmission, ii) a scheduled UE performing fast LBT (as compared to the eNB) with a more aggressive choice of parameters than the eNB and iii) a scheduled UE performing LBT using parameters as used by the eNB for LBT. In some embodiments, the UL grant transmission by the eNB occurs in the unlicensed band after a successful LBT procedure at the eNB.

    SUBFRAME ALIGNED LISTEN-BEFORE-TALK FOR CELLULAR IN UNLICENSED BAND
    26.
    发明申请
    SUBFRAME ALIGNED LISTEN-BEFORE-TALK FOR CELLULAR IN UNLICENSED BAND 有权
    未经许可的细胞中的子帧对齐的前体

    公开(公告)号:US20160135055A1

    公开(公告)日:2016-05-12

    申请号:US14711278

    申请日:2015-05-13

    Abstract: Disclosed in some examples are systems, machine-readable media, methods, and cellular wireless devices which implement a Listen-Before-Talk (LBT) access scheme for a device operating according to a cellular wireless protocol in an unlicensed channel. A cellular wireless device may utilize the cellular wireless protocol in the unlicensed channel after the LBT access scheme has determined that a channel (a defined range of frequencies) in the unlicensed channel is idle for a particular period of time.

    Abstract translation: 在一些示例中公开了系统,机器可读介质,方法和蜂窝无线设备,其针对在非许可信道中根据蜂窝无线协议操作的设备实现了在线对讲(LBT)接入方案。 在LBT接入方案已经确定非许可信道中的信道(定义的频率范围)在特定时间段内空闲之后,蜂窝无线设备可以在非许可信道中利用蜂窝无线协议。

    Channel state information (CSI) measurements and CSI reporting in licensed assisted access (LAA)

    公开(公告)号:US10750394B2

    公开(公告)日:2020-08-18

    申请号:US15767861

    申请日:2016-08-23

    Abstract: Techniques for channel state information (CSI) reporting are discussed. One example apparatus at a user equipment can derive, for one or more subframes of a license assisted access (LAA) secondary cell (SCell), one or more channel measurements based on reference signals (e.g., cell-specific reference signals (CRS) or CSI reference signals (CSI-RS)), in those subframes; generate CSI that comprises a channel quality indicator (CQI) based on an average of the one or more channel measurements from multiple subframes comprising a first subframe and a later second subframe, wherein each orthogonal frequency division multiplexing (OFDM) symbol of a second slot of the first subframe is occupied, wherein each of a first three OFDM symbols of the second subframe are occupied, and wherein each OFDM symbol between the first subframe and the second subframe is occupied; and generate a CSI report that indicates the set of CSI parameters.

    Contention window size adaptation
    28.
    发明授权

    公开(公告)号:US10708000B2

    公开(公告)日:2020-07-07

    申请号:US15760010

    申请日:2016-03-28

    Abstract: Techniques for contention window size (CWS) adaptation (CWSA) are discussed. One example apparatus can comprise a processor that can receive HARQ messages UEs in response to PDSCH transmissions in one or more reference subframes. The HARQ messages can comprise HARQ-ACK values that denote a HARQ-ACK state for a transport block associated with License Assisted Access (LAA) operation, wherein each of the HARQ-ACK states is one of a DTX state, an ACK state, a NACK state, or an “any” state. The processor can also; determine a metric value for each of the HARQ-ACK states; calculate a CWS adjustment metric based on the determined metric values; increase a CWS to a next higher allowed value when the CWS adjustment metric is greater than or equal to a threshold; and reset the CWS to a minimum allowed value when the CWS adjustment metric is less than the threshold.

    Device, system and method of quasi-orthogonal multiple access

    公开(公告)号:US10390292B2

    公开(公告)日:2019-08-20

    申请号:US15553363

    申请日:2015-10-19

    Abstract: An eNodeB (eNB), user equipment (UE) and method of providing a quasi-orthogonal multiple access (QOMA) resources are generally described. The UE receives allocation of orthogonal multiple access (OMA) and non-OMA (NOMA) resources. The UE transmits data up to a maximum NOMA rate and NOMA Modulation and Coding Scheme (MCS) using the NOMA resources without receiving an explicit transmission grant from the eNB. The eNB may allocate multiple NOMA regions associated with different maximum rates, MCSs, number of UEs, UE types, applications and sizes. If the data exceeds the NOMA conditions or the UE is unable to transmit data using the allocated NOMA resources or does not receive an acknowledgement from the eNB regarding reception of the transmitted data, the UE may request an explicit grant of the OMA resources from the eNB and, upon receiving an allocation of the OMA resources, subsequently transmit the data using the allocated OMA resources.

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