公开(公告)号：US20190075597A1

公开(公告)日：2019-03-07

申请号：US16108862

申请日：2018-08-22

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Tamer KADOUS

IPC: H04W74/08 ,  H04W72/04 ,  H04W36/04 ,  H04J11/00 ,  H04W8/22 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described. A base station may configure a system frame number (SFN) and hyper-SFN associated with a long term sensing pattern. The base station may then transmit the SFN and hyper-SFN to indicate a sensing period corresponding to the long term sensing pattern. A UE may receive a SFN and hyper-SFN associated with a long term sensing pattern. The UE may determine, based on the SFN and hyper-SFN, a sensing period corresponding to the long term sensing pattern. The UE may then suspend a plurality of procedures during the sensing period.

公开(公告)号：US20190007946A1

公开(公告)日：2019-01-03

申请号：US15980568

申请日：2018-05-15

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Tamer KADOUS ,  Chih-Hao LIU ,  Mostafa KHOSHNEVISAN

IPC: H04W72/04 ,  H04W76/27 ,  H04W68/02 ,  H04W16/14 ,  H04W16/32

Abstract: Some techniques described herein assist a user equipment with acquiring and/or reacquiring, from a base station, a dynamic list of channels to be used for frequency hopping when communicating over an unlicensed radio frequency spectrum band, thereby increasing communication reliability and promoting coexistence in the unlicensed radio frequency spectrum band. Some techniques described herein also assist the user equipment in obtaining the list of channels with low latency (e.g., shortly after the list has changed) and with low power consumption. Numerous other aspects are provided.

公开(公告)号：US20180316454A1

公开(公告)日：2018-11-01

申请号：US15942088

申请日：2018-03-30

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar DAMNJANOVIC ,  Tao LUO ,  Andrei RADULESCU ,  Srinivas YERRAMALLI ,  Rahul MALIK

IPC: H04J11/00 ,  H04W48/10 ,  H04L5/00

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：US20180270819A1

公开(公告)日：2018-09-20

申请号：US15986769

申请日：2018-05-22

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Wanshi CHEN ,  Peter GAAL ,  Xiaoxia ZHANG

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

Abstract: In enhanced licensed assisted access (eLAA), providing several approaches to report the 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：US20180242184A1

公开(公告)日：2018-08-23

申请号：US15874249

申请日：2018-01-18

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Peter GAAL ,  Farhad MESHKATI

IPC: H04W24/10 ,  H04W16/14 ,  H04W16/18 ,  H04B1/7087

Abstract: Aspects of the disclosure provide methods and apparatus for enhanced reporting in for a UE operating in a shared spectrum. The UE may detect at least one parameter associated with a non-serving base station (BS) operating in a same spectrum as a serving BS and report, to the serving BS, an indication of the (at least one) parameter.

公开(公告)号：US20180124789A1

公开(公告)日：2018-05-03

申请号：US15635000

申请日：2017-06-27

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Tamer KADOUS ,  Chih-Hao LIU ,  Chirag PATEL ,  Alberto RICO ALVARINO

IPC: H04W72/04 ,  H04W28/26 ,  H04L29/08 ,  H04W4/00

CPC classification number: H04W72/0453 ,  H04B1/713 ,  H04L1/12 ,  H04L1/189 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/14 ,  H04L67/12 ,  H04W4/70 ,  H04W16/14 ,  H04W28/26 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/048 ,  H04W74/0808 ,  H04W88/02 ,  H04W88/08

Abstract: A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A base station apparatus may perform a dual CCA procedure for a frame, wherein the dual CCA procedure comprises a first type of CCA procedure followed by a second type of CCA procedure when the first type of CCA procedure is unsuccessful. The apparatus may transmit during the frame when at least one CCA procedure of the dual CCA procedure is successful and may refrain from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful. In performing the dual CCA procedure, the apparatus may perform CCA for a first period of time then perform eCCA for a second period of time following the CCA, when the CCA is unsuccessful.

公开(公告)号：US20180124770A1

公开(公告)日：2018-05-03

申请号：US15635051

申请日：2017-06-27

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Tamer KADOUS ,  Chih-Hao LIU ,  Chirag PATEL ,  Alberto RICO ALVARINO

IPC: H04W72/04 ,  H04W4/00

Abstract: A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A base station apparatus performs an LBT procedure at a beginning of frames and transmits a plurality of repetitions of a transmission. When the plurality of repetitions span multiple frames and the LBT procedure is not successful for a first frame, the base station drops or postpones at least one repetition in the first frame until a second frame when the LBT procedure is successful. A UE receives the plurality of repetitions and may combine a plurality of repetitions across multiple frames. The UE may determine whether the base station drops the at least one repetition in the first frame or postpones the at least one repetition in the first frame until a second frame.

公开(公告)号：US20180020452A1

公开(公告)日：2018-01-18

申请号：US15610817

申请日：2017-06-01

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Alberto RICO ALVARINO ,  Hao XU ,  Wanshi CHEN ,  Juan MONTOJO ,  Yongbin WEI ,  Peter GAAL

IPC: H04W72/04 ,  H04W52/14 ,  H04W76/04 ,  H04L5/00 ,  H04W52/34 ,  H04W56/00 ,  H04W74/08 ,  H04W88/08 ,  H04L29/08

Abstract: Various aspects of utilizing narrowband internet of things (NB IOT) communication are still under development. According to an aspect of the disclosure, the apparatus may be a user equipment (UE) using digital modulation for wireless communication via NB IOT communication in an unlicensed spectrum. The UE utilizes a plurality of downlink carriers in the unlicensed spectrum occupying at least a first minimum bandwidth by the plurality of downlink carriers and a plurality of uplink carriers in the unlicensed spectrum occupying at least a second minimum bandwidth with the plurality of uplink carriers. The UE performs communication using one or more of the plurality of downlink carriers and the plurality of uplink carriers.

公开(公告)号：US20170094672A1

公开(公告)日：2017-03-30

申请号：US15274632

申请日：2016-09-23

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Arumugam CHENDAMARAI KANNAN ,  Jing LEI ,  Sridhar RAMANUJAM ,  Yongbin WEI

IPC: H04W72/08 ,  H04L12/26 ,  H04W28/02 ,  H04W24/10

Abstract: The disclosure provides for detecting interference in wireless communications. A wireless devices may receive an interfering signal on a portion of unlicensed spectrum. The wireless device may perform cyclic autocorrelation on the interfering signal to determine one or both of a cyclic prefix length and a symbol period. The wireless device may determine a radio access technology of the interfering signal based on one or both of the cyclic prefix length and the symbol period. In an aspect, the wireless device may further transmit an interference report including information regarding the interfering signal including the cyclic prefix length, symbol period, identified radio access technology, or packet length.

公开(公告)号：US20250106878A1

公开(公告)日：2025-03-27

申请号：US18729117

申请日：2023-01-04

Applicant: QUALCOMM Incorporated

Inventor： Mukesh KUMAR ,  Alexandros MANOLAKOS ,  Srinivas YERRAMALLI

IPC: H04W72/40 ,  H04W92/18

Abstract: Disclosed are techniques for wireless communication. In an aspect, a sidelink user equipment (UE) receives, from a first sidelink UE, a first list of a first set of sidelink transmission resources for transmission of sidelink reference signals by the sidelink UE, wherein sidelink transmission resources of the first set of sidelink transmission resources are listed in the first list in a first priority order, and transmits one or more sidelink reference signal resources on at least a subset of the first set of sidelink transmission resources, wherein the subset of the first set of sidelink transmission resources is selected based on the first priority order.