公开(公告)号：US20190223215A1

公开(公告)日：2019-07-18

申请号：US16203073

申请日：2018-11-28

Applicant: QUALCOMM Incorporated

Inventor： Qingjiang Tian ,  Jing Sun ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W74/08 ,  H04W16/14 ,  H04W72/14 ,  H04W72/04 ,  H04L1/00

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may obtain access to a shared radio frequency spectrum band for a transmission opportunity. The UE may perform an autonomous uplink transmission over the shared radio frequency spectrum band during a first portion of the transmission opportunity. The UE may transmit a physical layer scheduling request comprising a transmission size parameter for a second portion of the transmission opportunity. The UE may receive an uplink grant for the second portion of the transmission opportunity based at least in part on the scheduling request. The UE may perform a scheduled uplink transmission over the shared radio frequency spectrum band during the second portion of the transmission opportunity according to the uplink grant.

公开(公告)号：US10356761B2

公开(公告)日：2019-07-16

申请号：US15471524

申请日：2017-03-28

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Wanshi Chen ,  Peter Gaal ,  Juan Montojo

IPC: H04W72/04 ,  H04L1/18 ,  H04L5/00 ,  H04W72/12 ,  H04W16/14 ,  H04W24/10

Abstract: Uplink control channel transmission in a shared radio frequency spectrum band may be transmitted using different uplink resources UCI based on a format of uplink control information (UCI) to be transmitted in the uplink control channel transmission. Different time resources, frequency resources, or combinations thereof, for the transmission of UCI by a UE may be provided by a base station and selected by the UE based on a UCI format. The resources to be used for UCI transmission may semi-statically configured, or dynamically indicated to a UE. Uplink transmissions may be configured in interlaces of frequency resources, with each interlace having one or more segments, and a base station may configure different segments for transmission of different format UCI. In some cases, different subframes, or different component carriers, may be configured for different formats of UCI.

公开(公告)号：US20190182826A1

公开(公告)日：2019-06-13

申请号：US16212402

申请日：2018-12-06

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W16/14 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described for multiplexing of uplink channels in a shared radio frequency spectrum band. Techniques may provide for segmenting uplink resources into multiple different sets of uplink resources, each set of uplink resources having one or more associated uplink control channel resources. A base station or user equipment (UE) may select a set of uplink resources from the multiple sets of uplink resources for uplink transmissions from the UE based on a location of the uplink control channel resources of the set of uplink resources relative to other allocated uplink resources of the UE. Uplink control information (UCI) may be multiplexed with one or more uplink shared channel transmissions of a UE for transmission to a base station in certain circumstances.

公开(公告)号：US10314037B2

公开(公告)日：2019-06-04

申请号：US15642104

申请日：2017-07-05

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Seyedkianoush Hosseini ,  Peter Gaal ,  Srinivas Yerramalli ,  Hao Xu ,  Jing Sun ,  Shimman Arvind Patel ,  Aamod Khandekar

IPC: H04W72/04 ,  H04L1/18 ,  H04L5/00 ,  H04W76/27 ,  H04W88/02

Abstract: Methods, systems, and devices for wireless communication are described that provide for reduced timing between certain downlink communications and responsive uplink communications relative to certain legacy systems (e.g., legacy LTE systems). A user equipment (UE) or base station may be capable of operating using two or more timing configurations that each include an associated time period between receipt of a downlink communication (e.g., a grant of uplink resources or shared channel data) and a responsive uplink communication (e.g., an uplink transmission using the granted uplink resources or feedback of successful reception of the shared channel data). In cases where a UE or base station are capable of two or more timing configurations, a timing configuration for a transmission may be determined and the responsive uplink communication transmitted according to the determined timing configuration.

公开(公告)号：US10306632B2

公开(公告)日：2019-05-28

申请号：US14865640

申请日：2015-09-25

Applicant: QUALCOMM Incorporated

Inventor： Peter Gaal ,  Srinivas Yerramalli ,  Durga Prasad Malladi ,  Naga Bhushan ,  Yongbin Wei ,  Tao Luo ,  Hao Xu ,  Wanshi Chen ,  Shimman Arvind Patel ,  Aleksandar Damnjanovic ,  Xiaoxia Zhang

IPC: H04W72/04 ,  H04L5/00 ,  H04W16/14 ,  H04W40/24 ,  H04W74/08 ,  H04W88/02 ,  H04W88/08 ,  H04L1/00

Abstract: Techniques are described for wireless communication. A first method includes winning a contention for access to an unlicensed radio frequency spectrum band, and transmitting at least a portion of a channel usage beacon signal (CUBS) over the unlicensed radio frequency spectrum band. The at least portion of the CUBS is transmitted in a number of frequency interlaces of the unlicensed radio frequency spectrum band. A second method includes winning a contention for access to an unlicensed radio frequency spectrum band; determining whether the contention is won within a threshold time before a next symbol period boundary; and transmitting at least a portion of a CUBS over the unlicensed radio frequency spectrum band. The at least portion of the CUBS is transmitted during a preamble including a fractional period of a first symbol period. The at least portion of the CUBS may be based at least in part on the determining.

公开(公告)号：US20190159280A1

公开(公告)日：2019-05-23

申请号：US16193786

申请日：2018-11-16

Applicant: QUALCOMM Incorporated

Inventor： Kaushik Chakraborty ,  Rahul Malik ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W76/28 ,  H04W76/15 ,  H04W52/02

Abstract: Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support communications between a base station and a user equipment (UE) on multiple carriers. A UE may maintain a connection with a base station on a first carrier (e.g., an anchor carrier), and the UE may use a discontinuous reception (DRX) cycle on a second carrier. The DRX cycle may include scheduled on-durations during which the UE may monitor the second carrier for signaling from the base station. To reduce the power consumption at the UE associated with repeatedly monitoring scheduled on-durations, the base station may transmit wake-up signaling to the UE on the first carrier to identify the on-durations that include data from the base station. Accordingly, the UE may monitor these on-durations for the data and avoid monitoring other on-durations to limit power consumption.

公开(公告)号：US20190149190A1

公开(公告)日：2019-05-16

申请号：US16173945

申请日：2018-10-29

Applicant: QUALCOMM Incorporated

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

IPC: H04B1/7143 ,  H04B1/7156 ,  H04W4/02 ,  H04W48/16

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may identify synchronization signals and a set of frequency hopping channels for communications as part of a discovery reference signal (DRS) in an anchor channel. The set of frequency hopping channels may include a sequence to indicate an order for utilizing each hopping channel of the set of hopping channels. In some cases, the hopping sequence may be a pseudo random sequence. Additionally, the hopping sequence may defined such that a non-repeating hopping sequence or pattern which visits all hopping frequencies before revisiting the same frequency is utilized. As such, each hopping channel may be utilized an equal number of times within a period of time and have an approximately equal occupancy time to the other hopping channels.

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：US10182456B2

公开(公告)日：2019-01-15

申请号：US15246005

申请日：2016-08-24

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Maarten Menzo Wentink ,  Srinivas Yerramalli ,  Qingsi Wang ,  Yongbin Wei ,  Juan Montojo

IPC: H04W74/08 ,  H04W16/14 ,  H04W84/12 ,  H04L5/00 ,  H04W88/06

Abstract: Detection and reporting techniques for collisions between transmitters of two different radio access technologies (RATs) transmitting in a shared radio frequency spectrum band is described. The collision may occur following a listen-before-talk procedure but prior to transmission of data, and may not affect the reception of the transmitted data. Collisions may be detected using for example, energy sensing, preamble or ready-to-send (RTS) signal detection, or unsuccessful decoding of all or part of a channel reservation signal. A transmitting device may determine a collision has occurred by detecting an energy level during a preamble transmission is greater than a threshold level or by detecting that an energy level during a transmission gap of a time-domain energy pattern is above a threshold level. A receiving device, such as a user equipment (UE), that detects the collision may report the collision to the transmitter.

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.