Single user OFDM with bit loading in wireless communications

    公开(公告)号:US10097674B2

    公开(公告)日:2018-10-09

    申请号:US15392840

    申请日:2016-12-28

    Abstract: In single user OFDM wireless communication, the serial bit stream in a Medium access control Protocol Data Unit (MPDU) to be transmitted may be split up and routed in parallel through different encoding modules. In one embodiment the entire bit stream may be processed through an LDPC, and the output of the LDPC module split up before being routed to different Modulation Modules that each select a separate MCS for the associated sub-band. In another embodiment the bit stream may be split up before being processed separately through multiple LDPC modules, and the output of each LDPC module may then be routed to a different associated Modulation Module for selection of a separate MCS for the associated sub-band.

    ENERGY DETECTION THRESHOLD ADAPTATION FOR LICENSED ASSISTED ACCESS OF LTE IN UNLICENSED BAND

    公开(公告)号:US20180234886A1

    公开(公告)日:2018-08-16

    申请号:US15751127

    申请日:2015-12-26

    CPC classification number: H04W28/18 H04J2211/005 H04W16/14 H04W74/0808

    Abstract: When performing a contention protocol, such as Listen-Before-Talk (LBT), an Long Term Evolution (LTE)-Licensed Assisted Access (LAA) node dynamically adapts the ED threshold used by the LTE-LAA node depending on whether other transmission nodes are detected at the frequency components that are to be used by the LTE-LAA node. In one implementation, the ED threshold value may initially be set to a conservative value, and when other transmissions nodes are not detected, the ED threshold value may be set to a more aggressive value. In another implementation, the ED threshold value may initially be set to a more aggressive value, and only when another transmission node is detected, the ED threshold value may be set to a more conservative value. In yet another possible implementation, the ED threshold value and the transmit power may be proportionally modified, for a particular UE, based on a parameter associated with the UE.

    Clear channel assessment (CCA) in wireless networks

    公开(公告)号:US10028303B2

    公开(公告)日:2018-07-17

    申请号:US15088591

    申请日:2016-04-01

    Abstract: This disclosure describes methods, apparatus, and systems related to providing a source device more degrees of freedom in the performing CCA, and in using CCA for communicating with neighboring devices. Before accessing the channel, a source device may need to perform carrier sense multiple access with collision avoidance (CSMA/CA), the CSMA/CA additionally comprising CCA. In various embodiments, CCA can be performed either using quasi-omnidirectional receiving antenna(s), or using directional receiving antenna(s). In one embodiment, one or more requisite conditions for performing directional CCA can be specified. In another aspect, sensitivity level adjustments can be provided when performing directional CCA and/or quasi-omnidirectional CCA.

    Station (STA) and method for communication on primary and secondary channel resources

    公开(公告)号:US09918329B2

    公开(公告)日:2018-03-13

    申请号:US14813581

    申请日:2015-07-30

    CPC classification number: H04W72/12

    Abstract: Embodiments of a station (STA) and method for communication on primary and secondary channel resources are generally described herein. The STA may transmit a grant frame to indicate a transmission of a data payload by the STA during a grant period. The grant frame may indicate whether the data payload is to be transmitted on primary channel resources or on secondary channel resources. The STA may transmit the data payload to a destination STA on the secondary channel resources when the grant frame indicates that the data payload is to be transmitted on the secondary channel resources. The grant frame may be transmitted on the primary channel resources and on the secondary channel resources when the grant frame indicates that the data payload is to be transmitted on the secondary channel resources.

    Apparatus, system and method of communicating via a plurality of sectorized antennas

    公开(公告)号:US09866291B1

    公开(公告)日:2018-01-09

    申请号:US15199588

    申请日:2016-06-30

    CPC classification number: H04B7/0452 H04B7/0897 H04L61/6022 H04L69/322

    Abstract: For example, an apparatus may include a plurality of Physical layer (PHY) components including circuitry to communicate via a respective plurality of sectorized antennas of a wireless station over a directional frequency band; a plurality of lower Medium Access Control (MAC) components, a lower MAC component of the plurality of lower MAC components configured to control channel access of the wireless station via a respective sectorized antenna of the plurality of sectorized antennas, and to process MAC Protocol Data Units (PDUs) to be communicated via the sectorized antenna; and an upper MAC component configured to cause the wireless station to transmit an information element via at least one sectorized antenna of the plurality of sectorized antennas, the information element comprising at least a MAC address of the wireless station, and a field to indicate a plurality of identifiers (IDs) of the plurality of sectorized antennas.

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