公开(公告)号：US10405262B2

公开(公告)日：2019-09-03

申请号：US15679034

申请日：2017-08-16

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Andrei Dragos Radulescu ,  Chirag Patel ,  Tamer Kadous

IPC: H04W48/08 ,  H04W16/14 ,  H04W48/12 ,  H04W48/16 ,  H04W48/18 ,  H04W74/08 ,  H04W88/02 ,  H04W84/04 ,  H04W16/28 ,  H04W56/00 ,  H04W74/00

Abstract: Techniques are described for wireless communication. A method for wireless communication at a user equipment (UE) includes receiving an instance of a discovery reference signal (DRS) on a beam over a shared radio frequency spectrum band; determining a public land mobile network identifier (PLMN ID) based at least in part on a time-frequency location of the instance of the DRS; and selectively performing a random access procedure based at least in part on the determined PLMN ID. A method for wireless communication at a base station includes transmitting an instance of a DRS on a beam over a shared radio frequency spectrum band; and transmitting a PLMN ID based at least in part on a time-frequency location of the DRS.

公开(公告)号：US20190239190A1

公开(公告)日：2019-08-01

申请号：US16382084

申请日：2019-04-11

Applicant: QUALCOMM Incorporated

Inventor： Chirag Patel ,  Tao Luo ,  Arumugam Chendamarai Kannan

IPC: H04W68/02 ,  H04W16/14 ,  H04W48/16 ,  H04W72/00 ,  H04W74/08 ,  H04L5/00

CPC classification number: H04W68/02 ,  H04L5/0023 ,  H04L5/0048 ,  H04W16/14 ,  H04W48/16 ,  H04W68/025 ,  H04W72/005 ,  H04W74/0808 ,  H04W74/0833

Abstract: Methods, systems, and devices for wireless communication are described. The described techniques provide for transmitting, at a base station, a contention exempt broadcast paging message that includes partial paging information for a user equipment (UE), receiving a random access request message transmitted by a UE in response to the broadcast paging message, and transmitting a unicast paging message which includes complete paging information. The described techniques further provide for determining, at a base station, a first paging opportunity window (POW) and a second POW for a UE, performing a LBT procedure during the first POW, transmitting a broadcast paging message including partial paging information for the UE during the first POW, performing a second LBT procedure during the second POW, transmitting a unicast paging message to the UE during the second POW, the unicast paging message including complete paging information for the UE.

公开(公告)号：US10219300B2

公开(公告)日：2019-02-26

申请号：US15240476

申请日：2016-08-18

Applicant: QUALCOMM Incorporated

Inventor： Alexei Gorokhov ,  Peter Gaal ,  Nachiappan Valliappan ,  Chirag Patel ,  Ahmed Sadek ,  Brian Banister ,  Tao Luo ,  Tamer Kadous

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

Abstract: Techniques for reservation coordination on a shared communication medium are disclosed. An access point, for example, may contend for access to a communication medium, and transmit a channel reservation message in accordance with a first Radio Access Technology (RAT) to reserve the communication medium for a transmission opportunity (TXOP) duration based on the contending. The access point may then transmit, during the reserved TXOP duration, a reservation coordination signal in accordance with a second RAT to convey reservation coordination information associated with the reserved TXOP duration.

公开(公告)号：US20180242276A1

公开(公告)日：2018-08-23

申请号：US15674372

申请日：2017-08-10

Applicant: Qualcomm Incorporated

Inventor： Chirag Patel ,  Tao Luo ,  Arumugam Chendamarai Kannan

IPC: H04W68/02 ,  H04W48/16 ,  H04L5/00 ,  H04W74/08 ,  H04W72/00 ,  H04W16/14

CPC classification number: H04W68/02 ,  H04L5/0023 ,  H04L5/0048 ,  H04W16/14 ,  H04W48/16 ,  H04W68/025 ,  H04W72/005 ,  H04W74/0808 ,  H04W74/0833

Abstract: Methods, systems, and devices for wireless communication are described. The described techniques provide for transmitting, at a base station, a contention exempt broadcast paging message that includes partial paging information for a user equipment (UE), receiving a random access request message transmitted by a UE in response to the broadcast paging message, and transmitting a unicast paging message which includes complete paging information. The described techniques further provide for determining, at a base station, a first paging opportunity window (POW) and a second POW for a UE, performing a LBT procedure during the first POW, transmitting a broadcast paging message including partial paging information for the UE during the first POW, performing a second LBT procedure during the second POW, transmitting a unicast paging message to the UE during the second POW, the unicast paging message including complete paging information for the UE.

公开(公告)号：US09992800B2

公开(公告)日：2018-06-05

申请号：US15586840

申请日：2017-05-04

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Peter Gaal ,  Chirag Patel ,  Arumugam Chendamarai Kannan ,  Juan Montojo ,  Yongbin Wei

IPC: H04W16/14 ,  H04W74/08 ,  H04L5/00 ,  H04L1/00 ,  H04L1/08

CPC classification number: H04W74/0833 ,  H04L1/00 ,  H04L1/08 ,  H04L5/00 ,  H04L5/0041 ,  H04W16/14 ,  H04W74/0866

Abstract: Techniques are described for wireless communication. One method includes transmitting a sequence of deterministic variations of random access data on at least one interlace of non-contiguous frequency resources allocated to a physical random access channel (PRACH) in an unlicensed spectrum, beginning at a first time; repeating the transmitting of the sequence of deterministic variations of random access data at least once, beginning at a second time; generating at least one modification of the sequence of deterministic variations of random access data, in which the at least one modification is generated according to a modification sequence; and transmitting on the at least one interlace, beginning at a third time, the at least one modification of the sequence of deterministic variations of random access data.

公开(公告)号：US20170311343A1

公开(公告)日：2017-10-26

申请号：US15492461

申请日：2017-04-20

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Chirag Patel ,  Tao Luo ,  Tamer Kadous

IPC: H04W72/12 ,  H04L1/18 ,  H04L5/00 ,  H04W72/14

CPC classification number: H04W72/1284 ,  H04L1/1812 ,  H04L5/001 ,  H04L5/0055 ,  H04L5/0064 ,  H04W72/14

Abstract: Methods, systems, and devices for wireless communication are described. The payload size for uplink transmissions of unscheduled control information may vary and, in some cases, may be dynamically determined. A user equipment (UE) may determine a payload size or may select a payload size from a set of predetermined sizes. A base station may independently determine the same payload size or it may blindly detect the payload size upon receiving the uplink (UL) transmission. Or the base station may indicate the payload size to the UE. Additionally, UL grants issued to the UE may take one of several forms (e.g., different downlink control indicator formats), and characteristics of the grant may indicate information about resources assigned by the grant, including a location of the resources among various transmission opportunities or whether the grant is for multiple subframes.

公开(公告)号：US20170280382A1

公开(公告)日：2017-09-28

申请号：US15465383

申请日：2017-03-21

Applicant: QUALCOMM Incorporated

Inventor： Andrei Dragos Radulescu ,  Tao Luo ,  Chirag Patel ,  Miguel Griot ,  Manu Sharma ,  Tamer Kadous ,  Rajat Prakash

IPC: H04W48/18 ,  H04W48/16 ,  H04W74/08 ,  H04W48/10

CPC classification number: H04W48/18 ,  H04W48/10 ,  H04W48/16 ,  H04W74/0833

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may attempt to access a network at a local area network access point without prior context information. The access point may be a hotspot operating in unlicensed spectrum according to a Long Term Evolution (LTE)-based standard. The UE may be unable to determine if it is authorized to access the network, so the UE may attempt to obtain system information that provides a list of service providers supported by the network. The UE may then determine whether it has credentials for a supported service provider, and the UE may access the network using those credentials when a supported service provider is recognized. Other broadcast messages may provide information about system information for supported service providers. A UE that is unable to access the network using stored credentials may attempt access using a random access channel procedure.

公开(公告)号：US20170251456A1

公开(公告)日：2017-08-31

申请号：US15441222

申请日：2017-02-23

Applicant: QUALCOMM Incorporated

Inventor： Andrei Radulescu ,  Chirag Patel ,  Tao Luo ,  Arumugam Chendamarai Kannan

IPC: H04W72/04 ,  H04W72/12 ,  H04W24/10 ,  H04W24/08 ,  H04B17/318 ,  H04L5/00

CPC classification number: H04W72/042 ,  H04B17/318 ,  H04J11/0036 ,  H04L5/0048 ,  H04L5/0057 ,  H04L5/0092 ,  H04L41/0866 ,  H04W24/08 ,  H04W24/10 ,  H04W48/00 ,  H04W48/16 ,  H04W52/0216 ,  H04W56/00 ,  H04W72/0453 ,  H04W72/085 ,  H04W72/1289 ,  H04W74/002 ,  H04W74/0833 ,  H04W88/02 ,  H04W88/08 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/21 ,  Y02D70/24 ,  Y02D70/25

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may monitor a neighbor cell and report the result to a serving base station. Based on the report, the serving base station may identify an estimated discovery reference signal (DRS) transmission window of the neighbor cell. In some cases, the UE may estimate and report parameters of the neighbor DRS transmission window, and in other cases, the UE may make a measurement report and the base station may infer DRS transmission window parameters. The base station may then provide the UE with a DRS measurement timing configuration (DMTC) based on the estimated parameters of the neighbor cell so that the UE may monitor the neighbor cell and the serving cell in an efficient manner. For example, the UE may conserve battery life by refraining from monitoring DRS during periods when a DRS transmission is not likely.