公开(公告)号：US10225818B2

公开(公告)日：2019-03-05

申请号：US15870824

申请日：2018-01-12

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04W72/12 ,  H04W68/02 ,  H04W72/04 ,  H04W8/00 ,  H04W16/14 ,  H04W28/04

Abstract: In an embodiment, an apparatus (e.g., eNB) pages UEs on a shared communication. The apparatus obtains paging message(s) for transmission to UEs with different coverage levels. The apparatus transmits an extended common ePDCCH, followed by a paging ePDCCH, followed by repetitive transmissions of the paging message(s) over a plurality of PDSCH subframes. In a further embodiment, the apparatus obtains first and second sets of paging messages for transmission to different paging groups. The apparatus establishes non-overlapping POWs for the first and second paging groups to avoid a paging ePDCCH collision.

公开(公告)号：US10178649B2

公开(公告)日：2019-01-08

申请号：US16048218

申请日：2018-07-27

Applicant: QUALCOMM Incorporated

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

IPC: H04W68/02 ,  H04W72/04 ,  H04L5/00 ,  H04W8/00 ,  H04W16/14 ,  H04W28/04

Abstract: In an embodiment, an apparatus (e.g., eNB) pages UEs on a shared communication. The apparatus obtains paging message(s) for transmission to UEs with different coverage levels. The apparatus transmits an extended common ePDCCH, followed by a paging ePDCCH, followed by repetitive transmissions of the paging message(s) over a plurality of PDSCH subframes. In a further embodiment, the apparatus obtains first and second sets of paging messages for transmission to different paging groups. The apparatus establishes non-overlapping POWs for the first and second paging groups to avoid a paging ePDCCH collision.

公开(公告)号：US20180359656A1

公开(公告)日：2018-12-13

申请号：US15892183

申请日：2018-02-08

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Andrei Dragos Radulescu ,  Tamer Kadous

IPC: H04W28/02 ,  H04W72/04 ,  H04L5/00 ,  H04W48/16 ,  H04W24/02

CPC classification number: H04W28/0289 ,  H04L5/0048 ,  H04W24/02 ,  H04W48/12 ,  H04W48/16 ,  H04W72/042 ,  H04W72/0446

Abstract: Configurations of system information blocks providing cell access information supporting wideband coverage enhancement in wireless communication networks are disclosed. Embodiments encode and transmit information elements for both a legacy system information block and a wideband coverage enhancement system information block in a multiple subframe discovery reference signal configuration. For example, embodiments may utilize a two subframe CR-DRS configuration in which a WCE SIB-MF1 message payload is encoded and transmitted independently with respect to a legacy SIB-MF1 message payload. Additionally, or alternatively, embodiment may utilize a two subframe CR-DRS configuration in which both a legacy SIB-MF1 message payload and a WCE SIB-MF1 message payload share the same DRS subframe payload by jointly encoding the legacy SIB-MF1 and WCE SIB-MF1 messages.

公开(公告)号：US20180343676A1

公开(公告)日：2018-11-29

申请号：US15987511

申请日：2018-05-23

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04W16/14 ,  H04W56/00

Abstract: Methods, systems, and devices for wireless communications are described. In some wireless systems utilizing shared radio frequency spectrum bands, base stations may operate in different listen before talk (LBT) modes. For example, a base station may operate in an LBT enabled mode or a non-LBT enabled mode. A UE may perform system acquisition with the base station based on receiving acquisition signals (e.g., synchronization signals and physical broadcast channel (PBCH) signals) from the base station. These acquisition signals may depend on the LBT mode of the base station. For example, the frame timing and number of subframes for the acquisition signals may be based on the LBT mode of the base station. In some cases, a base station may adaptively switch LBT modes, and the UE may re-synchronize with the base station based on an LBT configuration period or a paging message from the base station.

公开(公告)号：US20180070243A1

公开(公告)日：2018-03-08

申请号：US15644517

申请日：2017-07-07

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Chirag Patel ,  Tamer Kadous ,  Hao Xu

IPC: H04W16/14 ,  H04W74/08 ,  H04W4/00 ,  H04L5/14 ,  H04W76/04

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and base station may communicate using narrow band internet of things (NB-IoT) techniques or enhanced machine type communication (eMTC) in unlicensed spectrum. The UE may be an eMTC device or another device capable of communication without user direction. The UE may identify a geographic region and select a communication mode that is consistent with regulatory restrictions in that region. For example, in some cases, the communication mode may be based on using time division duplexing (TDD), using frequency hopping, or performing a listen-before-talk (LBT) procedure at the base station. A frame structure for TDD may include LBT subframes, uplink portions, downlink portions, and special subframes for switching. The base station may perform LBT procedures in the LBT subframes. If frequency hopping is enabled, a configurable number of TDD frames may be grouped into a hopping frame block.

公开(公告)号：US12302393B2

公开(公告)日：2025-05-13

申请号：US17840157

申请日：2022-06-14

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Jing Sun ,  Yisheng Xue ,  Xiaoxia Zhang

IPC: H04W74/0816 ,  H04L1/00 ,  H04L5/00 ,  H04W72/02 ,  H04W72/0446 ,  H04W72/1263 ,  H04W74/00 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting user equipment may receive control information indicative of a plurality of starting symbols in a first slot, the plurality of starting symbols including at least one default starting symbol and one or more subsequent starting symbols, each of the plurality of starting symbols representing a potential starting symbol for transmission, by the transmitting UE, of a sidelink communication. The transmitting UE may perform a listen-before-talk procedure during at least the first slot and may transmit, to a receiving UE and based on performance of the listen-before-talk procedure during at least the first slot, at least an initial portion of the sidelink communication during a selected starting symbols of the plurality of starting symbols, the selected starting symbol being one of the one or more subsequent starting symbols and representing a beginning of a channel occupancy duration.

公开(公告)号：US12295035B2

公开(公告)日：2025-05-06

申请号：US17906509

申请日：2020-04-16

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Changlong Xu ,  Chih-Hao Liu ,  Ozcan Ozturk ,  Yisheng Xue

IPC: H04W74/0816 ,  H04L27/26 ,  H04W72/25 ,  H04W74/08

Abstract: Wireless communications systems and methods related to use of cyclic prefix (CP) extensions for channel occupancy time (COT) sharing among sidelink user equipment devices (UEs) are provided. A first UE detects a first sidelink transmission in a COT, the COT for sharing with multiple sidelink UEs including the first sidelink UE. The first UE may determine a CP extension length for transmitting a second sidelink transmission after the first sidelink transmission, where a gap duration between the first sidelink transmission and the second sidelink transmission satisfies a listen-before-talk (LBT) gap time threshold. The first UE may apply a CP extension having the CP extension length to the second sidelink transmission and transmit, to a second sidelink UE, the second sidelink transmission with the CP extension.

公开(公告)号：US12238786B2

公开(公告)日：2025-02-25

申请号：US17943851

申请日：2022-09-13

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Chih-Hao Liu ,  Tamer Kadous

IPC: H04L27/26 ,  H04L5/00 ,  H04W74/0833 ,  H04W76/27

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform a transmission detection procedure on each base station before combining control information. The UE may use demodulation reference signals (DMRS) as a detection mechanism. If the UE detects a DMRS from a base station, the UE may determine that a control resource set associated with the base station is valid for combining. If the UE does not detect DMRS from the base station, the UE may refrain from combining control information from the base station. In another example, base stations that pass a listen-before-talk (LBT) procedure may transmit a preamble before transmitting control information. A preamble may carry a preamble sequence associated with a specific control resource set. The UE may identify a preamble sequence and determine that the corresponding control resource set is valid for control information combining.

公开(公告)号：US12212513B2

公开(公告)日：2025-01-28

申请号：US17452979

申请日：2021-10-29

Applicant: QUALCOMM INCORPORATED

Inventor： Chih-Hao Liu ,  Jing Sun ,  Yisheng Xue ,  Xiaoxia Zhang

IPC: H04L5/00 ,  H04W72/0446 ,  H04W72/20

Abstract: Wireless communications systems and methods related to communicating control information are provided. A method of wireless communication performed by a first sidelink user equipment (UE) may include transmitting, to a second sidelink UE, at least one channel state information reference signal (CSI-RS) in a slot and transmitting, to the second sidelink UE, at least one sidelink synchronization signal block (S-SSB) in the slot, wherein an occupied channel bandwidth (OCB) associated with the slot satisfies a threshold based at least on the transmitting the at least one CSI-RS and the transmitting the at least one S-SSB.

公开(公告)号：US12200666B2

公开(公告)日：2025-01-14

申请号：US17727408

申请日：2022-04-22

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Jing Sun ,  Yisheng Xue ,  Xiaoxia Zhang

IPC: H04W72/02 ,  H04W72/04 ,  H04W72/0453 ,  H04W72/20 ,  H04W92/18

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit signaling that includes an indication of a resource block set configuration to one or more sidelink UE, the resource block set configuration based at least in part on a type of sidelink communications to be performed and from a set of available resource block set configurations that comprises at least a minimum overlapping frequency resource block set configuration. The UE may perform the sidelink communications with the one or more sidelink UE according to the resource block set configuration.