公开(公告)号：US10356623B2

公开(公告)日：2019-07-16

申请号：US14486114

申请日：2014-09-15

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Kamel Sadek ,  Mohammad Naghshvar ,  Nachiappan Valliappan

IPC: H04W16/14 ,  H04L12/26 ,  H04W72/12

Abstract: Aspects for reducing interference between networks are provided. A signal transmitted by a first network over a communications medium using an unlicensed frequency spectrum is decoded to determine one or more parameters of a packet in the signal. A level of utilization of the communications medium by the first network can be estimated based at least in part on a signal strength of the signal and the one or more parameters. A time for communicating in a second network over the communications medium using the unlicensed frequency spectrum can be adjusted based at least in part on the level of utilization of the communications medium by the first network.

公开(公告)号：US10334546B2

公开(公告)日：2019-06-25

申请号：US15250392

申请日：2016-08-29

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Tao Luo ,  Ahmed Kamel Sadek ,  Nachiappan Valliappan ,  Chirag Sureshbhai Patel ,  Mingxi Fan ,  Tamer Adel Kadous

IPC: H04W56/00 ,  H04W16/14 ,  H04L5/00

Abstract: Techniques for synchronization on a shared communication medium are disclosed. An access point may select, for example, a common sequence, frequency, and time for a first synchronization signal that is coordinated with one or more other access points. The access point may then transmit the first synchronization signal in accordance with the common sequence, frequency, and time. An access terminal may receive, from an access point, a first synchronization signal having a first sequence and a second synchronization signal having a second sequence. The access terminal may then determine an offset in time between the first synchronization signal and the second synchronization signal, and determine a cell identifier group associated with the access point based on the offset.

公开(公告)号：US10299284B2

公开(公告)日：2019-05-21

申请号：US15250765

申请日：2016-08-29

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/12 ,  H04W16/14 ,  H04L5/00 ,  H04W72/04 ,  H04L5/14 ,  H04W74/08 ,  H04W84/12

Abstract: Techniques for managing access to a shared communication medium are disclosed. Scheduling grants may be sent to different access terminals for different sets of resources for uplink transmission on the communication medium. A series of re-contention gaps may be scheduled for access terminal contention within or between the different sets of resources. Uplink and downlink transmission on the communication medium may be silenced during each of the series of re-contention gaps. Moreover, an access terminal may receive a scheduling grant that allocates a set of resources to the access terminal for uplink transmission on a communication medium and contend for access to the communication medium based on the scheduling grant. The access terminal may then selectively transmit uplink traffic over the allocated set of resources based on the contending.

公开(公告)号：US10291379B2

公开(公告)日：2019-05-14

申请号：US15234991

申请日：2016-08-11

Applicant: QUALCOMM Incorporated

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

IPC: H04J3/00 ,  H04L5/00 ,  H04L1/16 ,  H04L1/18 ,  H04L5/14 ,  H04W74/08 ,  H04W16/14 ,  H04W48/00 ,  H04W72/04 ,  H04L1/12

Abstract: Techniques for managing contention on a shared communication medium are disclosed. Various techniques are provided to facilitate aspects such as reference signaling, downlink medium access, uplink medium access, resource reuse, channel structures, acknowledgment schemes, fairness, acquisition, random access, paging, mobility, inter-operator mitigation, and so on for a frame structure implemented on the shared communication medium.

公开(公告)号：US10153970B2

公开(公告)日：2018-12-11

申请号：US14948668

申请日：2015-11-23

Applicant: QUALCOMM Incorporated

Inventor： Nachiappan Valliappan ,  Ahmed Kamel Sadek

IPC: H04W72/04 ,  H04W28/26 ,  H04L12/741 ,  H04W16/14 ,  H04W88/06 ,  H04W74/08 ,  H04L5/00 ,  H04W72/12

Abstract: Systems and methods for co-existence between wireless Radio Access Technologies (RATs) employing channel reservation on a shared communication medium are disclosed. One or more channel reservation messages defined for a first RAT may be received to reserve the communication medium for a reservation duration, with the communication medium comprising a plurality of component channels. A first component channel may be determined among the plurality of component channels to be protected for operation of a second RAT in accordance with the one or more channel reservation messages. Communication via the first RAT may nevertheless proceed on a second component channel among the plurality of component channels during the reservation duration.

公开(公告)号：US10110337B2

公开(公告)日：2018-10-23

申请号：US15221294

申请日：2016-07-27

Applicant: QUALCOMM Incorporated

Inventor： Mohammad Naghshvar ,  Ahmed Kamel Sadek ,  Nachiappan Valliappan

IPC: H04J11/00 ,  H04L29/06 ,  H04L12/801 ,  H04L5/00 ,  H04B17/318 ,  H04B17/336 ,  H04W74/08 ,  H04W40/24 ,  H04W16/32 ,  H04W84/12 ,  H04W28/14 ,  H04W16/14

Abstract: Aspects for reducing interference between networks are provided. A signal transmitted by one or more devices in a first network over a communications medium using an unlicensed frequency spectrum is decoded to determine one or more parameters of a packet in the signal. A level of utilization of the communications medium by the one or more devices in the first network can be estimated based at least in part on a signal strength of the signal and the one or more parameters. A period of time for communicating in a second network over the communications medium using the unlicensed frequency spectrum can be adjusted based at least in part on the level of utilization of the communications medium by the first network. In addition, a number of active transmitters over the communications medium can be determined based at least in part on identifying a source entity related to transmission of the signal, and adjusting the time for communicating in the second network can be further based at least in part on the number of active transmitters.

公开(公告)号：US10091789B2

公开(公告)日：2018-10-02

申请号：US15240678

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 ,  H04L5/00 ,  H04W74/08 ,  H04L5/14 ,  H04L29/06

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：US20170093545A1

公开(公告)日：2017-03-30

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 ,  H04W72/04

CPC classification number: H04L5/0055 ,  H04L5/001 ,  H04L5/0039 ,  H04L5/0094

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.