公开(公告)号：US20200084759A1

公开(公告)日：2020-03-12

申请号：US16563730

申请日：2019-09-06

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Seyed Ali Akbar Fakoorian ,  Srinivas Yerramalli ,  Qingjiang Tian ,  Andrei Dragos Radulescu ,  Tamer Kadous

IPC: H04W72/04 ,  H04W72/08 ,  H04L5/00 ,  H04W24/10

Abstract: Generally, the described techniques provide for a base station transmitting an indication of a set of one or more available channels to a user equipment (UE). The base station may transmit to the UE a first downlink burst using a first channel and a first frame period. In some cases, the base station may detect interference associated with the first downlink burst, for example, by performing a listen-before-talk (LBT) procedure or through an interference management resources (IMR) procedure in which the base station transmits reference signal signals to the UE that the UE may use to return a report on measured interference. If the base station detects interference, the base station may transmit to the UE an instruction to switch to a second channel and a second frame period, where the second channel may be selected from the set of one or more available channels.

公开(公告)号：US10541772B2

公开(公告)日：2020-01-21

申请号：US15942088

申请日：2018-03-30

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Tao Luo ,  Andrei Dragos Radulescu ,  Srinivas Yerramalli ,  Rahul Malik

IPC: H04W48/10 ,  H04J11/00 ,  H04W16/14 ,  H04L5/00 ,  H04W56/00

Abstract: Various aspects described herein relate to techniques for synchronization signal transmissions in wireless communications (e.g., 5th Generation New Radio). In an aspect, a method includes detecting that a medium in a shared spectrum is busy, and delaying a transmission of a synchronization signal (SS) block in the shared spectrum in response to detecting that the medium is busy. The method further includes detecting that the previously busy medium is free, and transmitting, in response to detecting that the medium is free, a filler signal before transmitting the SS block in the shared spectrum, and the SS block includes one or more discovery reference signals (DRSs).

公开(公告)号：US20190320424A1

公开(公告)日：2019-10-17

申请号：US16380778

申请日：2019-04-10

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Aleksandar Damnjanovic ,  Xiaoxia Zhang ,  Tamer Kadous ,  Chih-Hao Liu ,  Seyed Ali Akbar Fakoorian ,  Andrei Dragos Radulescu

IPC: H04W72/04 ,  H04L5/00

Abstract: In various aspects, a base station and user equipment (UE) exchange an indication of UE capabilities and a monitoring schedule for the UE to monitor an integer M frequency band partitions for a predetermined signal. The base station performs one or more successful clear carrier assessments (CCAs) on an integer N frequency band partitions of the M frequency band partitions, wherein N

公开(公告)号：US20190053166A1

公开(公告)日：2019-02-14

申请号：US16033023

申请日：2018-07-11

Applicant: QUALCOMM Incorporated

Inventor： Sumeeth Nagaraja ,  Andrei Dragos Radulescu ,  Tao Luo ,  Sony Akkarakaran ,  Makesh Pravin John Wilson ,  Xiao Feng Wang ,  Shengbo Chen

IPC: H04W52/14 ,  H04W72/04 ,  H04W76/27 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit procedure-specific uplink power parameters to one or more user equipments (UEs) in a cell. A UE may determine a procedure including one or more uplink transmissions. The UE may determine a transmit power level corresponding to the procedure based at least in part on the procedure-specific uplink power parameters. The UE may transmit the one or more uplink transmissions using the determined transmit power level.

公开(公告)号：US10201014B2

公开(公告)日：2019-02-05

申请号：US15234959

申请日：2016-08-11

Applicant: QUALCOMM Incorporated

Inventor： Tamer Adel Kadous ,  Nachiappan Valliappan ,  Ahmed Kamel Sadek ,  Andrei Dragos Radulescu

IPC: H04L12/28 ,  H04W74/08 ,  H04W72/04 ,  H04W72/14 ,  H04W16/14 ,  H04W74/04

Abstract: Techniques for managing contention on a shared communication medium are disclosed. Various techniques are provided to facilitate aspects such as reference signaling, downlink medium access, uplink medium access, resource reuse, channel structures, acknowledgment schemes, fairness, acquisition, random access, paging, mobility, inter-operator mitigation, and so on for a frame structure implemented on the shared communication medium.

公开(公告)号：US20190014481A1

公开(公告)日：2019-01-10

申请号：US16024289

申请日：2018-06-29

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Andrei Dragos Radulescu ,  Tao Luo ,  Tamer Kadous ,  Aleksandar Damnjanovic

IPC: H04W16/14 ,  H04W72/04 ,  H04W74/08 ,  H04L5/00 ,  H04W24/10 ,  H04W72/08 ,  H04W76/27

Abstract: Methods, systems, and devices for wireless communication are described. The described techniques provide for transmission of uplink data from a user equipment (UE) in the absence of scheduled uplink resources for the uplink data transmission that are allocated to the UE prior to the transmission of the uplink data. Various examples provide frame structures that may be used for unscheduled uplink transmissions of a UE. Unscheduled uplink transmissions may be transmitted in a shared or unlicensed radio frequency spectrum, and access to the shared or unlicensed radio frequency spectrum may be determined based on a priority of an operator associated with a UE for accessing the spectrum. Beamforming techniques may be used for uplink and downlink transmissions and beam widths for beamformed transmissions may be selected based on the information transmitted in a transmission, an operator priority for use of shared radio frequency spectrum, or any combination thereof.

公开(公告)号：US20180242223A1

公开(公告)日：2018-08-23

申请号：US15679034

申请日：2017-08-16

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Andrei Dragos Radulescu ,  Chirag Patel ,  Tamer Kadous

IPC: H04W48/08 ,  H04W74/08

CPC classification number: H04W48/08 ,  H04W16/14 ,  H04W16/28 ,  H04W48/12 ,  H04W48/16 ,  H04W48/18 ,  H04W56/001 ,  H04W74/008 ,  H04W74/0833 ,  H04W84/042 ,  H04W88/02

Abstract: Techniques are described for wireless communication. A method for wireless communication at a user equipment (UE) includes receiving an instance of a discovery reference signal (DRS) on a beam over a shared radio frequency spectrum band; determining a public land mobile network identifier (PLMN ID) based at least in part on a time-frequency location of the instance of the DRS; and selectively performing a random access procedure based at least in part on the determined PLMN ID. A method for wireless communication at a base station includes transmitting an instance of a DRS on a beam over a shared radio frequency spectrum band; and transmitting a PLMN ID based at least in part on a time-frequency location of the DRS.

公开(公告)号：US20180241526A1

公开(公告)日：2018-08-23

申请号：US15899060

申请日：2018-02-19

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Andrei Dragos Radulescu ,  Chirag Sureshbhai Patel ,  Tamer Kadous

IPC: H04L5/00 ,  H04W16/14 ,  H04W74/08 ,  H04W56/00

CPC classification number: H04L5/0048 ,  H04B7/04 ,  H04B7/0695 ,  H04L27/0006 ,  H04W16/14 ,  H04W56/0005 ,  H04W74/0833

Abstract: Methods, systems, and devices for wireless communication are described that involve determining multiple beamformed transmission beams for transmission of an opportunistic or multi-beam discovery reference signal (DRS) over a shared radio frequency spectrum band. The base station may determine a contention exempt transmission (CET) period for the shared spectrum band and transmit the DRS using multiple transmission beams during CET period or the base station may perform a listen before talk (LBT) procedure, and transmit, based on the LBT procedure, the DRS over a shared radio frequency spectrum band. The base station may transmit an indication of the type of DRS transmission, a subframe offset, random access configurations, and/or error correcting codes to enable a user equipment to discover, connect to, and acquire timing information associated with the network.

公开(公告)号：US20180115933A1

公开(公告)日：2018-04-26

申请号：US15787653

申请日：2017-10-18

Applicant: QUALCOMM Incorporated

Inventor： Andrei Dragos Radulescu ,  Aziz Gholmieh ,  Tamer Kadous ,  Chirag Sureshbhai Patel

IPC: H04W36/08 ,  H04W16/14 ,  H04W36/00

CPC classification number: H04W36/08 ,  H04W16/14 ,  H04W36/0066 ,  H04W36/0072 ,  H04W36/14

Abstract: Techniques are provided for efficient handover of a user equipment (UE) between base stations that operate using different radio access technologies (RATs). A handover message to a UE may indicate that the UE is to be handed over from a source base station operating according to a first RAT to a target base station operating according to a second RAT. The handover message may be configured to be transmitted using the first RAT and include embedded information, that is transparent to the first RAT, for the handover to the target base station using the second RAT.

公开(公告)号：US09924368B2

公开(公告)日：2018-03-20

申请号：US14192139

申请日：2014-02-27

Applicant: QUALCOMM Incorporated

Inventor： Nachiappan Valliappan ,  Tamer Adel Kadous ,  Ahmed Kamel Sadek ,  Andrei Dragos Radulescu

IPC: H04W16/14 ,  H04W72/04 ,  H04L27/00 ,  H04W52/38 ,  H04L5/00 ,  H04W52/24 ,  H04W52/34 ,  H04W52/14

CPC classification number: H04W16/14 ,  H04L5/001 ,  H04L5/0032 ,  H04L5/0073 ,  H04L27/0006 ,  H04W52/143 ,  H04W52/243 ,  H04W52/244 ,  H04W52/34 ,  H04W52/343 ,  H04W52/346 ,  H04W52/38 ,  H04W72/0453

Abstract: Apparatus and methods of wireless communications are described for determining one or more bands (e.g., guard bands in wireless local area networks (WLANs)) in unused portions of an unlicensed spectrum, positioning one or more carriers for cellular communication (e.g., long term evolution (LTE) or LTE advanced communication) in the one or more bands, and performing the cellular communication over the unlicensed spectrum using the one or more carriers. In some non-limiting example aspects, the cellular communication may be in a standalone mode and the one or more carriers may include a primary component carrier (PCC) that is positioned in a Wi-Fi guard band. In these non-limiting example aspects, the apparatus and methods may further include allocating one or more secondary component carriers (SCCs) in Wi-Fi guard bands or in Wi-Fi channels, where the one or more SCCs are opportunistically tuned or turned ON/OFF based on cell loading or backhaul constraints.