公开(公告)号：US10674389B2

公开(公告)日：2020-06-02

申请号：US15828002

申请日：2017-11-30

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Andrei Dragos Radulescu ,  Chirag Sureshbhai Patel ,  Tamer Adel Kadous ,  Ashok Mantravadi ,  Aamod Khandekar

IPC: H04W24/10 ,  H04W36/30 ,  H04B7/06 ,  H04L5/00 ,  H04W84/12 ,  H04L1/00 ,  H04W16/14 ,  H04W24/02

Abstract: Techniques for access terminal radio link monitoring on a shared communication medium are disclosed. In an aspect, an access terminal detects a missed reference signal event associated with a radio link established on the shared communication medium, wherein detecting the missed reference signal event comprises determining that the access terminal did not detect a reference signal for measuring a quality of the radio link transmitted during a reference signal configuration window, assigns an error metric to the missed reference signal event based on reference signal monitoring capabilities of the access terminal, and triggers a radio link failure based on the assigned error metric. In an aspect, the missed reference signal event may be a missed Discovery Reference Signaling (DRS) event, the error metric may be a Block Error Rate (BLER) weight, and the reference signal for measuring the quality of the radio link comprises a Cell-specific Reference Signal (CRS).

公开(公告)号：US10484878B2

公开(公告)日：2019-11-19

申请号：US15705252

申请日：2017-09-14

Applicant: QUALCOMM Incorporated

Inventor： Chirag Sureshbhai Patel ,  Tamer Kadous

IPC: H04W16/14 ,  H04W72/04 ,  H04W74/08 ,  H04W76/15 ,  H04L5/00

Abstract: In an embodiment, a central coordination server (e.g., a Spectrum Access Server) partitions a shared communication medium into a contention-free partition where the shared communication medium is reserved for devices associated with a first set of operators and a contention-based partition where devices associated with a second set of operators contend for access to the shared communication medium, at least one operator belonging to both the first and second sets of operators. The central coordination server notifies target devices (e.g., APs, ATs, etc.) of the partitioning. In a further embodiment, a device (e.g., AP, AT, etc.) communicates over a portion of the contention-free partition that is reserved for an associated operator, and also over the contention-based partition.

公开(公告)号：US10374777B2

公开(公告)日：2019-08-06

申请号：US15249954

申请日：2016-08-29

Applicant: QUALCOMM Incorporated

Inventor： Tamer Adel Kadous ,  Chirag Sureshbhai Patel ,  Ahmed Kamel Sadek ,  Nachiappan Valliappan ,  Tao Luo ,  Alexei Yurievitch Gorokhov

IPC: H04L5/00

Abstract: Techniques for communication are disclosed. A method may include selecting from a subframe two or more resource elements for control signaling, wherein the subframe includes a plurality of symbol periods and each symbol period includes a plurality of resource elements, wherein the selected two or more resource elements are associated with a concurrent symbol period, and transmitting a resource allocation message to an access terminal, wherein the resource allocation message indicates that the selected two or more resource elements are allocated for control signaling.

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：US10182404B2

公开(公告)日：2019-01-15

申请号：US14179613

申请日：2014-02-13

Applicant: QUALCOMM Incorporated

Inventor： Rajat Prakash ,  Mehmet Yavuz ,  Farhad Meshkati ,  Chirag Sureshbhai Patel ,  Tamer Adel Kadous

IPC: H04W52/16 ,  H04W52/14 ,  H04W52/34 ,  H04W84/04 ,  H04W52/24

Abstract: A method for wireless communication may comprise, for example, automatically determining first power settings for a first radio access technology (RAT) based on second power settings for a second RAT, and automatically applying the first power settings as power settings for the first RAT.

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：US20180220428A1

公开(公告)日：2018-08-02

申请号：US15876013

申请日：2018-01-19

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Sanaz Barghi ,  Chirag Sureshbhai Patel ,  Mohammad Naghshvar ,  Tamer Adel Kadous

IPC: H04W72/08 ,  H04W74/00 ,  H04W74/02

CPC classification number: H04W72/082 ,  H04B7/0408 ,  H04B7/0617 ,  H04B7/086 ,  H04B17/345 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0055 ,  H04W72/046 ,  H04W74/008 ,  H04W74/02

Abstract: Methods, systems, and devices for wireless communication are described for monitoring interference level to selectively control usage of a contention-based protocol. In an example, a wireless device may transmit, while operating in a non-contention-based mode for a wireless link with a second wireless device, a first beamformed data transmission to the second wireless device over a shared channel. The wireless device may determine that an interference level condition is satisfied for the shared channel and transition from operating in the non-contention-based mode to operating in a contention-based mode for the wireless link based at least in part on the interference level condition being satisfied. The wireless device may perform a contention-based protocol, while operating in the contention-based mode for the wireless link with the second wireless device, prior to transmission of a second beamformed data transmission to the second wireless device over the shared channel.

公开(公告)号：US20180167968A1

公开(公告)日：2018-06-14

申请号：US15811335

申请日：2017-11-13

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Tamer Kadous ,  Srinivas Yerramalli ,  Chirag Sureshbhai Patel ,  Alberto Rico Alvarino

IPC: H04W72/14 ,  H04L1/18 ,  H04W72/12

Abstract: Techniques for wireless communication are described. One method includes assigning a downlink subframe that is a first occurring downlink subframe in a data frame; and transmitting an encoded control signal during a first transmission opportunity, the encoded control signal including a common portion for receiving devices, the common portion indicating a structure of the data frame, the encoded control signal further including a device specific portion for a specific receiving device, the device specific portion indicating uplink grants and downlink grants during the data frame for the specific receiving device, where at least the common portion of the encoded control signal is transmitted during the selected downlink subframe.

公开(公告)号：US20180146480A1

公开(公告)日：2018-05-24

申请号：US15814764

申请日：2017-11-16

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Chirag Sureshbhai Patel ,  Tamer Kadous

IPC: H04W72/04 ,  H04W72/12 ,  H04W16/14

CPC classification number: H04W72/0453 ,  H04W16/14 ,  H04W72/0413 ,  H04W72/1268 ,  H04W72/14 ,  H04W74/0833

Abstract: Disclosed techniques provide for different uplink resource allocation schemes in transmissions that use different shared radio frequency spectrum bands. In some cases, the different shared radio frequency spectrum bands may have different transmission characteristics or parameters, and associated resource allocation schemes may be selected to provide transmissions that are more likely to comply with the transmission characteristics or parameters associated with a particular band. In some cases, resource allocation types may be identified based on one band and mapped to identify uplink resources for an uplink transmission on a different shared radio frequency spectrum band.