公开(公告)号：US10708913B2

公开(公告)日：2020-07-07

申请号：US16203500

申请日：2018-11-28

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Wanshi Chen ,  Peter Gaal ,  Xiaoxia Zhang

IPC: H04W4/00 ,  H04W72/04 ,  H04W72/02 ,  H04L1/18 ,  H04L5/00 ,  H04W16/14

Abstract: In enhanced licensed assisted access (eLAA), providing several approaches to report the channel state information (CSI) measurement may be desirable to provide flexibility in CSI reporting, especially in aperiodic CSI reporting. Further, a difference in using a licensed carrier and an unlicensed carrier may be considered during communication. In addition, assigning different transmit power usage based on different transmission types may be desired. The apparatus may be a user equipment (UE). The apparatus may be a UE. The UE receives a grant for uplink communication. The UE determines a reporting subframe based on the grant. The UE determines whether to select, as a reference subframe, a triggering subframe in which the grant is received or a subframe before the reporting subframe. The UE transmits, in the reporting subframe, channel state information (CSI) measured in the reference subframe.

公开(公告)号：US20200163125A1

公开(公告)日：2020-05-21

申请号：US16684398

申请日：2019-11-14

Applicant: QUALCOMM INCORPORATED

Inventor： Kaushik Chakraborty ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Jing Sun

IPC: H04W74/08 ,  H04W72/04

Abstract: Wireless communications systems and methods related to communications in a network that supports data transmitted in an unlicensed frequency band and a licensed frequency band are provided. A first wireless communication device transmits in a first frequency band, a first system information signal indicating a first random access configuration for a second frequency band. The first wireless communication device transmits in a third frequency band, a second system information signal indicating a second random access configuration for the second frequency band. The first and third frequency bands are different frequency bands. Additionally, the first wireless communication device performs with a second wireless communication device, a random access procedure based on at least one of the first random access configuration or the second random access configuration.

公开(公告)号：US20200154477A1

公开(公告)日：2020-05-14

申请号：US16676308

申请日：2019-11-06

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Ozcan Ozturk ,  Srinivas Yerramalli

IPC: H04W74/08 ,  H04W28/06 ,  H04W74/00 ,  H04W72/04 ,  H04W72/12

Abstract: Enhancements to slot format indicator (SFI) for new radio (NR) unlicensed (NR-U) operations is disclosed. The SFI may be transmitted separately from a channel occupancy time (COT) range indication. The COT range indication identifies parameters of a three-segment structure of a current COT within the current TxOP. Upon receiving the SFI and COT range indication, a UE may engage in communications with the serving UE in accordance with the COT range indication and the SFI.

公开(公告)号：US20200154446A1

公开(公告)日：2020-05-14

申请号：US16674988

申请日：2019-11-05

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Jing Sun ,  Arumugam Chendamarai Kannan ,  Xiaoxia Zhang

IPC: H04W72/08 ,  H04W72/04 ,  H04L5/00 ,  H04W56/00

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a set of synchronization signal block (SSB) configurations for a corresponding set of frequency resource sets configured for communications in a shared frequency spectrum band. The UE may perform a listen-before-talk (LBT) procedure for each frequency resource set. If an LBT procedure is successful, the UE may select and communicate with a base station on the corresponding frequency resource sets. Accordingly, the UE may receive one or more SSBs from the base station on the selected frequency resource sets based on SSB configurations, which may indicate a floating or fixed configuration for SSBs. The UE may perform radio resource management (RRM) and radio link monitoring based on receiving the SSBs in one or more of the selected frequency resource sets according to the corresponding SSB configurations.

公开(公告)号：US20200099436A1

公开(公告)日：2020-03-26

申请号：US16698049

申请日：2019-11-27

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Srinivas Yerramalli ,  Tamer Kadous ,  Kaushik Chakraborty

IPC: H04B7/06 ,  H04B7/0404 ,  H04B7/08

Abstract: Methods, systems, and devices for wireless communications are described that provide for refinement of receive beam beamforming parameters at a user equipment (UE). A UE may transmit two or more signals in an uplink transmission that have different beamforming parameters. A base station receiving the uplink transmission may measure the two or more signals, and identify a first signal of the two or more signals based at least in part on the measuring. The base station may inform the UE of the identified first signal, which the UE may use to set receive beam beamforming parameters for one or more subsequent downlink transmissions.

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：US10542436B2

公开(公告)日：2020-01-21

申请号：US15644517

申请日：2017-07-07

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Chirag Patel ,  Tamer Kadous ,  Hao Xu

IPC: H04W16/14 ,  H04W4/70 ,  H04W76/28 ,  H04L5/14 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and base station may communicate using narrow band internet of things (NB-IoT) techniques or enhanced machine type communication (eMTC) in unlicensed spectrum. The UE may be an eMTC device or another device capable of communication without user direction. The UE may identify a geographic region and select a communication mode that is consistent with regulatory restrictions in that region. For example, in some cases, the communication mode may be based on using time division duplexing (TDD), using frequency hopping, or performing a listen-before-talk (LBT) procedure at the base station. A frame structure for TDD may include LBT subframes, uplink portions, downlink portions, and special subframes for switching. The base station may perform LBT procedures in the LBT subframes. If frequency hopping is enabled, a configurable number of TDD frames may be grouped into a hopping frame block.

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：US20200022180A1

公开(公告)日：2020-01-16

申请号：US16579453

申请日：2019-09-23

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Shimman Arvind Patel ,  Wanshi Chen ,  Naga Bhushan ,  Yongbin Wei ,  Hao Xu ,  Aleksandar Damnjanovic ,  Tingfang Ji ,  Durga Prasad Malladi ,  Srinivas Yerramalli ,  Peter Gaal

IPC: H04W74/00 ,  H04W74/08 ,  H04L27/26 ,  H04L5/00 ,  H04L5/14 ,  H04W56/00

Abstract: Techniques are described for wireless communication. A first method includes transmitting a first signal to indicate accessing a first channel in a radio frequency spectrum band, and transmitting information with the first signal in the radio frequency spectrum band. A second method includes winning contention to access a radio frequency spectrum band, and after the winning contention to access the radio frequency spectrum band, transmitting a first signal to align a starting point of a second signal with a reference boundary associated with the radio frequency spectrum band. A third method includes winning contention to access a radio frequency spectrum band during a first frame period, the first frame selected from a plurality of different frame periods, and transmitting a signal at a periodicity during one or more subframes of the first frame period for each of the plurality of different frame periods.

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.