公开(公告)号：US10356734B2

公开(公告)日：2019-07-16

申请号：US15824753

申请日：2017-11-28

Applicant: QUALCOMM INCORPORATED

Inventor： Sridhar Ramanujam ,  Xiaoxia Zhang ,  Tao Luo ,  Juan Montojo

IPC: H04L12/28 ,  H04W56/00 ,  H04L27/26 ,  H04J1/16

Abstract: The present disclosure provides an example method and an apparatus for transmitting synchronization signals from an eNB with a different subcarrier spacing from rest of transmissions. That is, a primary synchronization signal (PSS), a secondary synchronization signal (SSS) may be transmitted using a first subcarrier spacing, a physical broadcast channel (PBCH), and/or a reference signal (RS) may be transmitted with a second subcarrier spacing, and other transmissions may be made using a third subcarrier spacing that is different from at least one of the first or second subcarrier spacing. Further, the order of symbols mapped to the synchronization signals may be reversed or otherwise modified within a transmission subframe.

公开(公告)号：US20250008509A1

公开(公告)日：2025-01-02

申请号：US18705961

申请日：2021-12-07

Applicant: QUALCOMM INCORPORATED

Inventor： Altaf Ahmed ,  Muhammad Arif Munif ,  Arvind Vardarajan Santhanam ,  Sumit Kumar Singh ,  Akshay Sharma ,  Bhavana Pooja Perumal ,  Preeti Sivakumar ,  Sridhar Ramanujam ,  Saisruthi Kotamraju ,  Ling Xie ,  Abhimanyu Singh

IPC: H04W72/1268 ,  H04B7/06 ,  H04L1/1867 ,  H04W24/02 ,  H04W76/28

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may generate a scheduling request for transmission to a base station. The UE may pause a transmission of the scheduling request according to an overlap in time between a response window associated with the scheduling request and a scheduled tuneaway period of the UE. The UE may tune away from the base station during the tuneaway period. The UE may transmit the scheduling request after a completion of the tuneaway period according to the pausing.

公开(公告)号：US11212149B2

公开(公告)日：2021-12-28

申请号：US16705635

申请日：2019-12-06

Applicant: QUALCOMM Incorporated

Inventor： Sridhar Ramanujam ,  Xiaoxia Zhang ,  Taesang Yoo

IPC: H04L27/26 ,  H04L5/00 ,  H04J3/06 ,  H04L25/02 ,  H04L27/28 ,  H04W72/12

Abstract: Methods, systems, and devices for wireless communication are described. A wireless communications system may support techniques for using non-staggered reference signals to increase the efficiency of the system and reduce the complexity of channel estimation. A base station may schedule a transmission to a user equipment (UE) including pilot tones mapped to a first symbol and a second symbol. In some cases, the pilot tones on the first and second symbols may be non-contiguous, and the base station may scramble the pilot tones on the first and second symbols according to the same scrambling sequence. In other cases, the pilot tones on the first and second symbols may be contiguous, and the pilot tones may be scrambled according to the same or different scrambling sequences. These techniques may result in reduced complexity for interference estimation and channel estimation at a UE.

公开(公告)号：US09301161B2

公开(公告)日：2016-03-29

申请号：US13871242

申请日：2013-04-26

Applicant: QUALCOMM Incorporated

Inventor： Pavan Kumar Vitthaladevuni ,  Arnaud Meylan ,  Sharad Deepak Sambhwani ,  Brandon Allen Burdge ,  Sridhar Ramanujam ,  Siddharth Mohan

IPC: H04W24/02 ,  H04W48/18

CPC classification number: H04W24/02 ,  H04W48/18

Abstract: A method and apparatus for determining available downlink bandwidth are described. The described aspects may include estimating an available link capacity of a cell for a user equipment. The described aspects may include estimating an available fraction of cell resources for the user equipment. The described aspects may include estimating available bandwidth of the cell for the user equipment as a function of the estimated available link capacity and the estimated available fraction of cell resources. Available bandwidth may be estimated for a cell in a Universal Mobile Telecommunications System (UMTS) system when the user equipment is in an idle mode and/or a connected mode. Available bandwidth may be estimated for a cell in a Long Term Evolution (LTE) system when the user equipment is in an idle mode and/or a connected mode.

Abstract translation: 描述了一种用于确定可用下行链路带宽的方法和装置。 所描述的方面可以包括估计用于用户设备的小区的可用链路容量。 所描述的方面可以包括估计用户设备的小区资源的可用分数。 所描述的方面可以包括根据估计的可用链路容量和小区资源的估计可用分数来估计用户设备的小区的可用带宽。 当用户设备处于空闲模式和/或连接模式时，可以为通用移动电信系统（UMTS）系统中的小区估计可用带宽。 当用户设备处于空闲模式和/或连接模式时，可以为长期演进（LTE）系统中的小区估计可用带宽。

公开(公告)号：US10757665B2

公开(公告)日：2020-08-25

申请号：US16268916

申请日：2019-02-06

Applicant: QUALCOMM INCORPORATED

Inventor： Sridhar Ramanujam ,  Xiaoxia Zhang ,  Tao Luo ,  Juan Montojo

IPC: H04L12/28 ,  H04W56/00 ,  H04L27/26 ,  H04J1/16

Abstract: The present disclosure provides an example method and an apparatus for transmitting synchronization signals from an eNB with a different subcarrier spacing from rest of transmissions. That is, a primary synchronization signal (PSS), a secondary synchronization signal (SSS) may be transmitted using a first subcarrier spacing, a physical broadcast channel (PBCH), and/or a reference signal (RS) may be transmitted with a second subcarrier spacing, and other transmissions may be made using a third subcarrier spacing that is different from at least one of the first or second subcarrier spacing. Further, the order of symbols mapped to the synchronization signals may be reversed or otherwise modified within a transmission subframe.

公开(公告)号：US10531473B2

公开(公告)日：2020-01-07

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 ,  H04W24/10 ,  H04L12/26 ,  H04W28/02

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：US20180115448A1

公开(公告)日：2018-04-26

申请号：US15614317

申请日：2017-06-05

Applicant: QUALCOMM Incorporated

Inventor： Sridhar Ramanujam ,  Xiaoxia Zhang ,  Taesang Yoo

IPC: H04L27/26 ,  H04L5/00 ,  H04W72/12 ,  H04L27/28 ,  H04L25/02 ,  H04J3/06

CPC classification number: H04L27/2613 ,  H04J3/0605 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0048 ,  H04L5/005 ,  H04L25/0202 ,  H04L25/0224 ,  H04L25/0236 ,  H04L27/2611 ,  H04L27/28 ,  H04W72/121

Abstract: Methods, systems, and devices for wireless communication are described. A wireless communications system may support techniques for using non-staggered reference signals to increase the efficiency of the system and reduce the complexity of channel estimation. A base station may schedule a transmission to a user equipment (UE) including pilot tones mapped to a first symbol and a second symbol. In some cases, the pilot tones on the first and second symbols may be non-contiguous, and the base station may scramble the pilot tones on the first and second symbols according to the same scrambling sequence. In other cases, the pilot tones on the first and second symbols may be contiguous, and the pilot tones may be scrambled according to the same or different scrambling sequences. These techniques may result in reduced complexity for interference estimation and channel estimation at a UE.