公开(公告)号：US10652889B2

公开(公告)日：2020-05-12

申请号：US15635033

申请日：2017-06-27

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04L1/12 ,  H04W74/08 ,  H04B1/713 ,  H04L1/18 ,  H04W4/70 ,  H04L29/08 ,  H04W28/26 ,  H04L5/00 ,  H04L5/14 ,  H04W16/14 ,  H04W88/02 ,  H04W88/08

Abstract: A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A UE apparatus transmits uplink transmissions in a plurality of transmission units and hops frequency bands in a first pattern across frames based on a base station hopping pattern. The apparatus may transmit uplink transmissions based on dual hopping patterns, and may hop in a second pattern across transmission units within the base station's channel occupancy within a frame. A base station apparatus may hop frequency bands in a first pattern across frames based on a base station hopping pattern, and may receive uplink transmissions in a narrowband from a UE in a plurality of transmission units within the frequency bands based on the base station hopping pattern.

公开(公告)号：US10652854B2

公开(公告)日：2020-05-12

申请号：US16167417

申请日：2018-10-22

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W68/02 ,  H04W76/28 ,  H04W74/08 ,  H04W16/14 ,  H04L5/00 ,  H04B1/713 ,  H04W52/02 ,  H04W8/00 ,  H04W48/16 ,  H04W48/12

Abstract: A DRX/eDRX cycle may include a single PFW located in one of the non-anchor hopping frames and used to transmit a paging message. When the LBT procedure fails for the non-anchor hopping frame in which the PFW is located, transmission of the paging message may be delayed. Postponing the transmission of the paging message until a subsequent DRX/eDRX cycle be detrimental since the UE may not receive the change in system information at the next modification boundary. Thus, there is a need for paging mechanism the increases the chance of a UE receiving a paging message during a DRX/eDRX cycle. The present disclosure provides a paging mechanism that uses a PSFW with a PFW in each non-anchor hopping frame within a DRX/eDRX cycle. Hence, the chance of a UE receiving a paging message and hence the change in system information may be increased.

公开(公告)号：US20190386737A1

公开(公告)日：2019-12-19

申请号：US16531538

申请日：2019-08-05

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04B7/26 ,  H04W16/24 ,  H04W36/06 ,  H04W48/18 ,  H01Q1/24 ,  H04W8/00 ,  H04W72/08 ,  H04B7/0491 ,  H04W16/14 ,  H04B7/06 ,  H04W36/30 ,  H04W4/70

Abstract: Described techniques provide for switching a user equipment (UE) between different coverage enhancement (CE) modes, such as between a non-CE mode and a CE mode. A UE may determine that a CE mode switch is to be performed and may initiate the mode switching. The UE may compare signal qualities of signals from one or more base stations against one or more threshold values and determine that a switch from a CE mode to a non-CE mode, or from a non-CE to CE mode, is to be performed. In some cases, a UE may be in idle mode and switch between CE modes, or may perform a cell reselection to a different base station. In other cases, a UE may be in connected mode and may declare a radio link failure to initiate a mode switch. A base station may initiate mode switching based on radio link monitoring of UEs.

公开(公告)号：US10511987B2

公开(公告)日：2019-12-17

申请号：US16005558

申请日：2018-06-11

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W24/10 ,  H04W72/04 ,  H04W4/70 ,  H04L5/00

Abstract: Various features related to eMTC-U deployment are described. In an aspect of the disclosure, an apparatus (e.g., a base station) maybe configured to select a subset of non-anchor channels from a set of available non-anchor channels, where the subset of non-anchor channels may correspond to a bandwidth within an unlicensed band. The apparatus maybe further configured to transmit information indicating the subset of non-anchor channels via an anchor channel. In some configurations, the subset of non-anchor channels maybe selected based on channel measurements performed by the base station or a UE. In one aspect, a UE may receive, from a base station via an anchor channel, information indicating a subset of non-anchor channels selected from a set of available non-anchor channels. The UE may transmit data on one or more non-anchor channels of the subset of non-anchor channels.

公开(公告)号：US10484959B2

公开(公告)日：2019-11-19

申请号：US15985061

申请日：2018-05-21

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04L5/00 ,  G01S5/02 ,  G01S5/10 ,  H04W64/00 ,  H04B1/7143 ,  H04W48/16

Abstract: Methods, systems, and devices for wireless communication that support positioning techniques are described. One method may include receiving a positioning reference signal (PRS) configuration; receiving a plurality of PRS transmissions over a shared radio frequency spectrum from a plurality of base stations; and transmitting a measurement report of the PRS transmissions. The PRS transmissions may be received according to the PRS configuration. Another method may include receiving a discovery reference signal (DRS) transmission from a first base station; decoding a cell identifier of the first base station based on the DRS transmission; determining timing information of the first base station based on the DRS transmission; and transmitting a measurement report of the DRS transmission to a second base station.

公开(公告)号：US10411795B2

公开(公告)日：2019-09-10

申请号：US15919127

申请日：2018-03-12

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W72/00 ,  H04B7/26 ,  H01Q1/24 ,  H04B7/0491 ,  H04W72/08 ,  H04W16/24 ,  H04W8/00 ,  H04W16/14 ,  H04W36/06 ,  H04W48/18 ,  H04W4/70 ,  H04B7/06 ,  H04W36/30 ,  H04W88/04 ,  H04W74/08

Abstract: Described techniques provide for switching a user equipment (UE) between different coverage enhancement (CE) modes, such as between a non-CE mode and a CE mode. A UE may determine that a CE mode switch is to be performed and may initiate the mode switching. The UE may compare signal qualities of signals from one or more base stations against one or more threshold values and determine that a switch from a CE mode to a non-CE mode, or from a non-CE to CE mode, is to be performed. In some cases, a UE may be in idle mode and switch between CE modes, or may perform a cell reselection to a different base station. In other cases, a UE may be in connected mode and may declare a radio link failure to initiate a mode switch. A base station may initiate mode switching based on radio link monitoring of UEs.

公开(公告)号：US10298289B2

公开(公告)日：2019-05-21

申请号：US15854380

申请日：2017-12-26

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tamer Kadous ,  Chih-Hao Liu

IPC: H04B1/7143 ,  H04W8/00 ,  H04L5/00 ,  H04W16/14 ,  H04L27/00 ,  H04J3/00 ,  H04W16/10 ,  H04W48/12

Abstract: Methods, systems, and devices for wireless communication are described that provide for a base station to use frequency hopping for cell acquisition according to a frequency hopping pattern. The frequency hopping pattern may include a set of anchor channels and a set of non-anchor channels used by a base station to communicate with wireless devices. The base station may occupy an anchor channel more often than a non-anchor channel and may transmit acquisition signals using the anchor channel. The anchor channel may also be used by the base station and a user equipment (UE) to exchange paging information, positioning information, random access resources, location of other channels, etc.

公开(公告)号：US20190090178A1

公开(公告)日：2019-03-21

申请号：US16040098

申请日：2018-07-19

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W48/12 ,  H04W52/58 ,  H04L5/00 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communications are described. A base station and user equipment (UE) may utilize an enhanced physical downlink control channel (ePDCCH) within a common search space to establish a MulteFire connection. The common search space may include a common PDCCH (C-PDCCH) and a MulteFire system information block (SIB-MF1) grant. The base station may define one or more common search spaces for the SIB-MF1 grants and C-PDCCH and signal the resource allocation for the common search spaces to the UE within a master information block (MIB). Each common search space may include a fixed set of control elements that the UE monitors for decoding the SIB-MF1 grants and C-PDCCH. In some cases, the base station may hardcode resources for the SIB-MF1 grants and C-PDCCH. Alternatively, the base station may signal the resources for each of the SIB-MF1 grants and C-PDCCH via reserved bits in the MIB.

公开(公告)号：US20190037376A1

公开(公告)日：2019-01-31

申请号：US16045206

申请日：2018-07-25

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W4/70 ,  H04W72/04 ,  H04L5/00 ,  H04L1/18

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a configuration message indicating a payload size configuration for machine type communication (MTC) physical uplink control channel (PUCCH) messages. The UE may generate an MTC PUCCH message based at least in part on the payload size configuration and a PUCCH format of MTC uplink control information for transmission by the UE. The UE may transmit the MTC PUCCH message over a plurality of RBs in a frequency domain.

公开(公告)号：US20180368089A1

公开(公告)日：2018-12-20

申请号：US15989698

申请日：2018-05-25

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Arumugam Chendamarai Kannan ,  Chih-Hao Liu ,  Tamer Kadous

IPC: H04W56/00 ,  H04J11/00 ,  H04W16/14

Abstract: Methods, systems, and devices for wireless communication are described. A base station may identify a first synchronization sequence and generate a second synchronization sequence based at least in part on the first synchronization sequence. The base station may map the first synchronization sequence to a first resource block of a synchronization channel associated with a first frequency sub-band of a shared radio frequency spectrum band and the second synchronization sequence to a second resource block associated with a second frequency sub-band of the synchronization channel. The base station may then transmit the first synchronization sequence and the second synchronization sequence concurrently over the synchronization channel using the first resource block and the second resource block according to the mapping. In some cases, the second synchronization may be generated by applying a first phase shift to the first synchronization sequence.