公开(公告)号：US11284308B2

公开(公告)日：2022-03-22

申请号：US16584366

申请日：2019-09-26

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Kamel Sadek ,  Yisheng Xue ,  Siddhartha Mallik ,  Tamer Kadous ,  Xiaoxia Zhang ,  Taesang Yoo ,  Michael Mingxi Fan ,  Aleksandar Damnjanovic ,  Yongbin Wei ,  Jing Sun

IPC: H04W28/26 ,  H04W52/24 ,  H04L5/00 ,  H04W16/14 ,  H04B7/06 ,  H04L27/00 ,  H04L5/14 ,  H04B17/336 ,  H04W74/08 ,  H04W84/04

Abstract: A medium reservation framework is disclosed for coexistence of coordinated and uncoordinated wireless networks in licensed spectrum and shared spectrum. The proposed medium reservation framework organically takes into account operating regimes with different numbers of Tx/Rx antennas per node, provides flexibility in trading off medium contention aggressiveness and power saving, leverages the inherent synchronization nature of NR, and covers both coordinated and uncoordinated operation scenarios. Various aspects of the medium reservation framework may be centered on one or more combinations of some basic building blocks, such as an operation grid, synchronization signals, and reservation messages, such as a reservation request signal (RRQ) and one or more a reservation response signals (RRS).

公开(公告)号：US10993151B2

公开(公告)日：2021-04-27

申请号：US15526741

申请日：2015-11-12

Applicant: QUALCOMM Incorporated ,  Ahmed Kamel Sadek ,  Tamer Adel Kadous ,  Peng Cheng ,  Nachiappan Valliappan ,  Mohammad Naghshvar

Inventor： Ahmed Kamel Sadek ,  Tamer Adel Kadous ,  Peng Cheng ,  Nachiappan Valliappan ,  Mohammad Naghshvar

IPC: H04W36/00 ,  H04L1/18 ,  H04W72/04 ,  H04W52/02 ,  H04W28/18 ,  H04L1/00 ,  H04L5/00 ,  H04W88/06 ,  H04W72/00

Abstract: Techniques for co-existence between wireless Radio Access Technologies (RATs) are disclosed. During an active period of a Discontinuous Transmission (DTX) communication pattern, a first signal may be transmitted during a first subframe and a second signal may be transmitted during a second subframe, while during an inactive period the first signal may be transmitted during the first subframe and the second signal may be omitted during the second subframe. Retransmission of one or more packets may take place over a subset of less than all retransmission opportunities based on the DTX communication pattern. A Secondary Cell (SCell) may be reconfigured as the Primary Cell (PCell) and the PCell may be reconfigured as the SCell for one or more access terminals based on a load balancing condition or a channel selection condition.

公开(公告)号：US20200383140A1

公开(公告)日：2020-12-03

申请号：US16996232

申请日：2020-08-18

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Kamel Sadek ,  Aleksandar Damnjanovic

IPC: H04W74/08 ,  H04W72/08 ,  H04W56/00 ,  H04L5/00 ,  H04W74/00

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a first signal; listen, after transmitting the first signal and during a listening interval, for a second signal from a user equipment (UE) affected by the first signal, the second signal being indicative of interference at the first UE; receive the second signal during the listening interval; and initiate an interference management procedure based on receipt of the second signal.

公开(公告)号：US10736125B2

公开(公告)日：2020-08-04

申请号：US15587374

申请日：2017-05-04

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Kamel Sadek

IPC: H04W72/12 ,  H04W76/28 ,  H04W84/12 ,  H04W16/14 ,  H04W84/04 ,  H04W88/10

Abstract: Techniques for managing Radio Access Technology (RAT) aggregation on a shared communication medium are disclosed. Control signaling may be sent, over a shared communication medium to an access terminal, in accordance with a first RAT. Data traffic may be scheduled for transmission to the access terminal based on one or more operating mode criteria for selecting between RATs. The scheduled data traffic may be transmitted, over the shared communication medium to the access terminal, in accordance with a second RAT.

公开(公告)号：US10542541B2

公开(公告)日：2020-01-21

申请号：US15240750

申请日：2016-08-18

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04L29/06 ,  H04L5/00 ,  H04L5/14

Abstract: Techniques for managing re-contention on a shared communication medium are disclosed. In order to facilitate re-contending for access to the communication medium, an access point may adjust one or more uplink transmission parameters associated with a triggering condition for invoking a contention timer. In addition or as an alternative, the access point may mute transmission on the communication medium during one or more symbol periods designated for transmission. In addition or as an alternative, the access point may configure a timing advance to create a re-contention gap.

公开(公告)号：US10524148B2

公开(公告)日：2019-12-31

申请号：US14255897

申请日：2014-04-17

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Kamel Sadek

IPC: H04W24/10 ,  H04W16/14 ,  H04W88/06

Abstract: Described herein are techniques for efficient LTE operation in the unlicensed band. For example, the technique may involve initiating, at the wireless device, a signal measurement of an unlicensed communication band device. The technique may also involve sending, to an access point configured for operation in the unlicensed communication band, a measurement report including the signal measurement of the unlicensed communication band device.

公开(公告)号：US10375711B2

公开(公告)日：2019-08-06

申请号：US14078508

申请日：2013-11-12

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Kamel Sadek ,  Mehmet Yavuz ,  Tamer Adel Kadous

IPC: H04W72/12 ,  H04W16/14 ,  H04W88/10 ,  H04W24/02 ,  H04W84/04

Abstract: Described herein are techniques for reducing interference to non-cellular communications on an unlicensed band by a network entity sending/receiving cellular communications on the unlicensed band. For example, the technique may involve operating in a first mode using a first radio access technology (RAT1), and collecting interference measurements for interference to or from at least one mobile device while in the first mode. The technique may also involve switching to a second mode and using a second radio access technology (RAT2), and using the interference measurements from the first mode to minimize interference caused or experienced by the network entity in the second mode.

公开(公告)号：US10334588B2

公开(公告)日：2019-06-25

申请号：US14566068

申请日：2014-12-10

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Kamel Sadek

IPC: H04W72/04 ,  H04W72/12 ,  H04W72/08 ,  H04L1/00 ,  H04W48/00 ,  H04W76/15 ,  H04W74/08

Abstract: Systems and methods for Carrier Sense Adaptive Transmission (CSAT) communication in unlicensed spectrum are disclosed. Interference between Radio Access Technologies (RATs) may be reduced utilizing CSAT by, for example: receiving signals via a resource, wherein a first RAT is used to receive the signals; identifying utilization of the resource associated with the first RAT, wherein the identification is based on the received signals; cycling operation of a second RAT between activated and deactivated periods of transmission over the resource in accordance with a Time Division Multiplexing (TDM) communication pattern, wherein the cycling is based on the identified utilization of the resource; and transmitting an Activation/Deactivation Medium Access Control (MAC) Control Element (CE) to a user device associated with the second RAT to activate or deactivate the user device in accordance with the TDM communication pattern.

公开(公告)号：US10264541B2

公开(公告)日：2019-04-16

申请号：US15421080

申请日：2017-01-31

Applicant: QUALCOMM Incorporated

Inventor： Chirag Sureshbhai Patel ,  Tao Luo ,  Andrei Dragos Radulescu ,  Ahmed Kamel Sadek ,  Tamer Adel Kadous

IPC: H04L12/28 ,  H04W56/00 ,  H04W24/08 ,  H04W72/04 ,  H04L5/00 ,  H04W16/14 ,  H04W24/02 ,  H04W74/08 ,  H04W74/02 ,  H04J1/16 ,  H04W88/08

Abstract: Techniques for intra- and inter-operator coordination on a shared communication medium are disclosed. A central coordination server may send an operating mode information message to coordinate operation of different points on the communication medium. An access point may receive such an operating mode information message and adjust one or more communication parameters. An access point may determine a level of timing synchronization with neighboring access points and send a synchronization advertisement message to an access terminal. An access terminal may receive a synchronization advertisement message and perform one or more measurements of the neighboring access points.

公开(公告)号：US20190075595A1

公开(公告)日：2019-03-07

申请号：US16039141

申请日：2018-07-18

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Qingsi Wang ,  Ahmed Kamel Sadek

IPC: H04W74/08 ,  H04B7/0456 ,  H04B7/06 ,  H04W16/14 ,  H04L5/00 ,  H04W72/04

Abstract: Preceded contention reservation signals for synchronous new radio (NR) shared spectrum (NR-SS) networks are disclosed. A transmitter that uses precoded contention reservation signals may be configured either to skip or use the training phase for determining rank parameters. The transmitter participates in contention resolution with its receiver by transmitting the precoded contention reservation signals precoded with tentative rank parameters. After contention interval, receiver sends feedback to the transmitter identifying proposed rank parameters based on the strongest precoded contention signals of any neighboring nodes that also won access to the channel. When configured to skip the training phase, the transmitter sets the rank parameters according to the proposed rank parameters. Otherwise, the transmitter participates in the training phase with other winning nodes transmitting signals identifying proposed rank parameters. The receiver then feeds back refined rank parameters to the transmitter based on each of the proposed rank parameters of the training phase.