公开(公告)号：US20200008107A1

公开(公告)日：2020-01-02

申请号：US16426943

申请日：2019-05-30

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Srinivas Yerramalli ,  Arumugam Chendamarai Kannan ,  Tamer Kadous ,  Taesang Yoo ,  Jing Sun ,  Kapil Bhattad

IPC: H04W28/26 ,  H04W74/08 ,  H04W8/24 ,  H04W24/08 ,  H04L5/00

Abstract: Wireless communications systems and methods related to communicating in a shared communication medium with flexible scheduling are provided. A first wireless communication device communicates, with a second wireless communication device during a reservation period, a channel reservation request for a first transmission opportunity (TXOP) in a spectrum. The first wireless communication device communicates, with the second wireless communication device during a response period in response to the channel reservation request, a channel reservation response. The first wireless communication device communicates, with a third wireless communication device during a first time period between the reservation period and the response period, a first communication signal.

公开(公告)号：US20190357252A1

公开(公告)日：2019-11-21

申请号：US16372365

申请日：2019-04-01

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Arumugam Chendamarai Kannan ,  Tamer Kadous ,  Yongbin Wei ,  Aleksandar Damnjanovic

IPC: H04W74/08 ,  H04W72/14 ,  H04W72/12

Abstract: Methods, systems, and devices for wireless communications are described in which base stations and user equipment (UEs) may transmit using identified wireless resources in millimeter wave (mmW) radio frequency spectrum. A UE may receive an uplink grant from a base station that indicates uplink resources for transmission of uplink data from the UE to the base station in a shared mmW radio frequency spectrum band. An indication of a duration of a listen-before-talk (LBT) procedure may be provided in or with the uplink grant. The UE may perform, responsive to receiving the uplink grant, the LBT procedure to determine that the shared mmW radio frequency spectrum band is available for the uplink transmission. Based on the outcome of the LBT procedure, the UE may transmit the uplink data to the base station using the uplink resources indicated in the uplink grant.

公开(公告)号：US10368372B2

公开(公告)日：2019-07-30

申请号：US15404171

申请日：2017-01-11

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Tao Luo ,  Chirag Patel ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04L1/18 ,  H04W74/08 ,  H04W72/04 ,  H04W72/14 ,  H04W74/00

Abstract: Techniques for performing listen before talk (LBT) channel contention procedures in a shared radio frequency spectrum band are provided. The LBT techniques may include a shortened LBT procedure that may be selected if a base station has reserved a shared channel for a duration of expected user equipment (UE) uplink transmissions, and a full LBT procedure that may be selected if the base station has not reserved the channel for the duration of expected UE uplink transmissions. The shortened LBT procedure may include detecting energy levels of the channel for a relatively short time period relative to the full LBT procedure. The shortened LBT procedure may be selected if a time period between a UE receiving a grant of uplink resources and the beginning of the uplink resources is less than a threshold time value.

公开(公告)号：US10368348B2

公开(公告)日：2019-07-30

申请号：US15353876

申请日：2016-11-17

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Tao Luo ,  Chirag Sureshbhai Patel ,  Tamer Adel Kadous ,  Chih-Hao Liu

IPC: H04W72/04 ,  H04L5/14 ,  H04L5/00

Abstract: Techniques for control channel signaling on a shared communication medium are disclosed. An access point or an access terminal may communicate over a communication medium in accordance with a Time Division Duplex (TDD) frame structure defining a set of subframes that each span a plurality of time-domain symbol periods. The access point may transmit and the access terminal may receive control information via a short Physical Uplink Control Channel (sPUCCH) on one or more of the subframes in a portion of the subframe configured for uplink signaling. The sPUCCH may comprise one or more pilot symbols and one or more payload symbols that collectively occupy a subset of less than all of the symbol periods in each of the one or more subframes.

公开(公告)号：US10292093B2

公开(公告)日：2019-05-14

申请号：US15346986

申请日：2016-11-09

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Tao Luo ,  Chirag Sureshbhai Patel ,  Tamer Adel Kadous

IPC: H04W48/16 ,  H04W72/04 ,  H04W8/00 ,  H04L5/00 ,  H04W88/02 ,  H04W88/08

Abstract: Techniques for indicating and determining a subframe timing of an access point on a shared communication medium are disclosed. A method of transmitting a discovery reference signal (DRS) may include establishing a transmission timing for transmission of the DRS relative to a system timing of an access point, determining whether to transmit the DRS during a particular SF based on the selected DRS transmission window, and transmitting the DRS to at least one access terminal during the particular SF in response to a determination to transmit the DRS.

公开(公告)号：US20190104542A1

公开(公告)日：2019-04-04

申请号：US16135500

申请日：2018-09-19

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Ahmed Kamel Sadek ,  Vinay Chande ,  Sanaz Barghi ,  Tamer Kadous

IPC: H04W74/00 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communications are described. A base station may perform a channel access procedure on a shared radio frequency spectrum band using a first beam configuration. The base station may transmit, based at least in part on successful completion of the channel access procedure, a reservation request message (RRQ) to a user equipment (UE) using a second beam configuration, the second beam configuration comprising a beam width that is equal to or narrower than a beam width of the first beam configuration. The base station may receive a reservation response message (RRS) from the UE in response to the RRQ, the RRS comprising a third beam configuration that is based at least in part on the second beam configuration.

公开(公告)号：US10219252B2

公开(公告)日：2019-02-26

申请号：US15405237

申请日：2017-01-12

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Tao Luo ,  Chirag Patel ,  Tamer Kadous

IPC: H04W4/00 ,  H04W72/04 ,  H04L5/00 ,  H04L1/18 ,  H04L5/14

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit a control message during a special subframe of a radio frame. The UE may determine a payload size of the control message according to a radio resource configuration, or the UE may determine a payload size based on a number of bits associated with information to be sent in the control message. The UE may identify uplink resources of the special subframe to use for the control message based on explicit signaling or implicitly based on information to be sent in the control message. Designated resources for control message transmissions in a special subframe may remain the same or may change in subsequent transmission opportunities. The UE may determine to use the same or different resources of a special subframe in a subsequent transmission opportunity depending on when the UE receives downlink messages.

公开(公告)号：US10143005B2

公开(公告)日：2018-11-27

申请号：US14874160

申请日：2015-10-02

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Taesang Yoo ,  Siddhartha Mallik ,  Jelena Damnjanovic ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04W72/12 ,  H04L5/14 ,  H04L12/807 ,  H04W28/20 ,  H04W72/04 ,  H04W88/02

Abstract: Methods and apparatuses for managing uplink scheduling for one or more user equipment served by a network entity in a wireless communications system are presented. For instance, an example method is presented that includes generating, by the network entity, an uplink bandwidth allocation map, the uplink bandwidth allocation map defining an uplink bandwidth allocation for at least one of the one or more user equipment for at least one of a plurality of uplink transmission window lengths. In addition, the example method includes transmitting the uplink bandwidth allocation map to at least one of the one or more user equipment.

公开(公告)号：US20180278320A1

公开(公告)日：2018-09-27

申请号：US15925077

申请日：2018-03-19

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Tao Luo

IPC: H04B7/08

CPC classification number: H04B7/0811 ,  H04B7/0691 ,  H04B7/082 ,  H04B7/0868 ,  H04W72/046 ,  H04W74/0833

Abstract: Techniques are described for wireless communication at a user equipment (UE) having a plurality of antenna sub-arrays. One method includes performing an initial acquisition procedure with a base station using each antenna sub-array of a first subset of antenna sub-arrays, in which the first subset includes two or more antenna sub-arrays of the plurality of antenna sub-arrays; selecting an antenna sub-array from the first subset; and performing a random access procedure with the base station using the selected antenna sub-array. Another method includes performing a random access procedure with a base station using a first antenna sub-array in the plurality of antenna sub-arrays; selecting a second antenna sub-array in the plurality of antenna sub-arrays to use for communication with the base station after performing the random access procedure; and transmitting to the base station, on a beam, a scheduling request state indicating the selected second antenna sub-array.

公开(公告)号：US10080142B2

公开(公告)日：2018-09-18

申请号：US15080217

申请日：2016-03-24

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Arumugam Chendamarai Kannan ,  Xiaoxia Zhang ,  Hao Xu ,  Srinivas Yerramalli ,  Tao Luo

IPC: H04W16/14 ,  H04L5/00 ,  H04L27/00 ,  H04B17/345

CPC classification number: H04W16/14 ,  H04B17/345 ,  H04L5/001 ,  H04L5/003 ,  H04L5/0048 ,  H04L5/0051 ,  H04L27/0006

Abstract: Systems, methods, and apparatuses for detecting interference caused by a wireless local area network (WLAN) and a wireless wide area network (WWAN) node operating in an unlicensed or shared spectrum is disclosed. In accordance with the present disclosure, a base station may generate a null tone pattern for one or more subframes transmitted to the UE. The null tone pattern may include one or more null tones mapped to consecutive symbols in each resource block to detect interference. Accordingly, a UE may monitor a wireless channel from a base station for a null tone transmission. The UE may detect a null tone pattern by decoding a known physical layer channel to identify the null tone pattern. In some aspects, the UE may generate channel estimates, decode allocated resources, determine timing of future transmissions and/or establish communication with the base station based on the identified null tone pattern.