公开(公告)号：US20190274157A1

公开(公告)日：2019-09-05

申请号：US16415851

申请日：2019-05-17

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Aleksandar Damnjanovic ,  Kiran Kumar Somasundaram ,  Tao Luo ,  Onkar Jayant Dabeer ,  Durga Prasad Malladi ,  Naga Bhushan ,  Yongbin Wei ,  Peter Gaal ,  Wanshi Chen ,  Anastasios Stamoulis ,  Hao Xu ,  Xiaoxia Zhang

IPC: H04W72/12 ,  H04W52/54 ,  H04L5/00 ,  H04W74/08 ,  H04B7/08 ,  H04L29/08

Abstract: Techniques are described for wireless communication. A first method may include inserting, in a first transmission using a first radio access technology (RAT), a channel occupancy identifier for a second transmission using a second RAT. The first method may also include transmitting the first transmission having the channel occupancy identifier over an unlicensed radio frequency spectrum band. A second method may include receiving, at a receiver operated using a first RAT, a channel occupancy identifier for a transmission using a second RAT. The channel occupancy identifier may be received over an unlicensed radio frequency spectrum band. The second method may also include decoding the channel occupancy identifier to identify a backoff period, and refraining from accessing the unlicensed radio frequency spectrum band using the first RAT based at least in part on the identified backoff period.

公开(公告)号：US20190261379A1

公开(公告)日：2019-08-22

申请号：US16261203

申请日：2019-01-29

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Jing Sun ,  Xiaoxia Zhang ,  Kapil Bhattad

IPC: H04W72/08 ,  H04L29/12 ,  H04W72/02 ,  H04W4/08 ,  H04W72/04 ,  H04W72/12

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station, a group identifier of the UE. The UE may receive, from the base station, an indication of one or more group identifiers associated with scheduled communications with the base station during a time period. The UE may contend, based at least in part on the group identifier of the UE and the one or more group identifiers received from the base station, for access to a set of autonomous uplink (AUL) resources during the time period. The UE may perform, based at least in part on the contending, an AUL transmission to the base station using the set of autonomous uplink resources.

公开(公告)号：US20190246398A1

公开(公告)日：2019-08-08

申请号：US16390329

申请日：2019-04-22

Applicant: QUALCOMM Incorporated

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

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

CPC classification number: H04W72/0446 ,  H04L1/1812 ,  H04L1/1861 ,  H04L1/1896 ,  H04L5/00 ,  H04L5/0048 ,  H04W72/0413 ,  H04W72/042 ,  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：US20190239227A1

公开(公告)日：2019-08-01

申请号：US16383182

申请日：2019-04-12

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 ,  H04W74/08 ,  H04L5/00 ,  H04W16/14 ,  H04W40/24

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：US10349438B2

公开(公告)日：2019-07-09

申请号：US15061953

申请日：2016-03-04

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Wanshi Chen

IPC: H04W72/14 ,  H04W72/04 ,  H04W72/12 ,  H04W24/08 ,  H04L5/00 ,  H04L5/06 ,  H04W16/14

Abstract: Channel availability is uncertain when employing an unlicensed carrier. In particular, it may be difficult to schedule grants in advance because of the uncertainty associated with future channels availability. Accordingly, scheduling UL and/or DL grants exclusively using self-scheduling or exclusively using cross-carrier scheduling for utilizing an unlicensed carrier may result in wasted communication opportunities. Aspects disclosed herein whereby an eNB may use licensed and unlicensed carriers to communicate downlink grants and uplink grants for an unlicensed carrier to a UE. In one aspect, the eNB may use an unlicensed carrier to communicate downlink grants for downlink communication on the unlicensed carrier, and may use a licensed carrier to communicate uplink grants for uplink communication on the unlicensed carrier.

公开(公告)号：US20190208549A1

公开(公告)日：2019-07-04

申请号：US16228341

申请日：2018-12-20

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Rahul Malik ,  Srinivas Yerramalli

IPC: H04W74/08 ,  H04W48/16 ,  H04W16/14

CPC classification number: H04W74/0833 ,  H04L5/0048 ,  H04W16/14 ,  H04W48/16 ,  H04W88/02

Abstract: A joint low-band and high-band operation is disclosed for use in new radio (NR) shared spectrum (NR-SS) networks. In such networks, uplink and downlink communications may occur over separate bands, selected based on performance or quality characteristics. A user equipment (UE) may search each of one or both of a low-band spectrum and a high-band spectrum for system information signal that includes both a low-band random access configuration and a high-band random access configuration. The UE transmits a random access request on one of the bands and receives the random access response from one or more cells on the other band. The UE continues the random access procedure, transmitting the uplink message based on the random access response on the first band to a selected cell. The UE would then receive the contention resolution message from the selected cell on the second band.

公开(公告)号：US10341960B2

公开(公告)日：2019-07-02

申请号：US15710603

申请日：2017-09-20

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Peter Gaal

IPC: H04W52/14 ,  H04L5/00 ,  H04W52/34 ,  H04W16/16 ,  H04W28/02 ,  H04W28/26 ,  H04W72/04 ,  H04W72/14 ,  H04W74/08

Abstract: Handling transmissions in enhanced license assisted access (eLAA) networks is discussed. Specifically, when pauses occur in transmissions on contention-based shared channels involved in eLAA communications, various procedures may be used to restart transmissions on the contention-based shared channels on the uplink when the original channel occupancy was reserved by a serving base station.

公开(公告)号：US20190149185A1

公开(公告)日：2019-05-16

申请号：US16242969

申请日：2019-01-08

Applicant: QUALCOMM Incorporated

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

IPC: H04B1/403 ,  H04L5/00 ,  H04B1/00 ,  H04W72/04 ,  H04W16/14 ,  H04L27/00 ,  H04B7/26 ,  H04B1/26 ,  H04B1/707 ,  H04B7/24

Abstract: Methods, systems, and devices for wireless communication are described. Resources for narrowband communication in an unlicensed radio frequency spectrum band may be configured and allocated based on resource availability, regulatory constraints, and device capability or category. A narrowband wireless device, such as a machine type communication device or other relatively low complexity device, may communicate using one or more narrowband carriers, which may occupy between one tone and multiple resource blocks in an unlicensed spectrum band (e.g., any number of resources between one (1) tone and multiple resource blocks (RBs)). Different device types may thus be configured differently as they move between geographic regions. The base station may then communicate with the narrowband mobile device based on the resource allocation and the carrier configuration.

公开(公告)号：US10292158B2

公开(公告)日：2019-05-14

申请号：US15150790

申请日：2016-05-10

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Aleksandar Damnjanovic ,  Peter Gaal ,  Ravi Teja Sukhavasi ,  Xiaoxia Zhang

IPC: H04W72/04 ,  H04L1/18 ,  H04L5/00 ,  H04W4/06 ,  H04W74/08

Abstract: Techniques and devices are described for wireless communication. A base station may determine a parameter associated with a transmission such as hybrid automatic repeat request (HARQ) feedback, a signal-to-noise ratio, or a determination regarding whether the transmission was successfully decoded. The base station may then determine a contention window adjustment value based on the parameter. The base station may then apply weighting factor (e.g., based on the time of the transmission, a number of devices being served, aspects of the transmission parameter, etc.) to the contention window adjustment value may adjust a contention window size for a second transmission based on the weighted contention window adjustment value (and, in some cases, other weighted adjustments based on other transmissions). The base station may then perform a clear channel assessment (CCA) based on the contention window size.

公开(公告)号：US20190141707A1

公开(公告)日：2019-05-09

申请号：US16180772

申请日：2018-11-05

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W72/02

Abstract: A base station (BS) may communicate with a user equipment (UE) using a subset of channels. The BS may select a subset of a set of channels for use in communication with the UE. The BS may transmit, to the UE, a signal to identify the subset of channels. In some aspects, the BS may transmit, and the UE may receive, a channel list indicator identifying the subset of channels. The channel list indicator may include an integer value, which the UE may use to identify a subset of combinatorial factors. Based at least in part on the subset of combinatorial factors, the UE may identify the subset of the set of channels for use in communication with the BS. The UE may communicate with the BS using at least one of the subset of the set of channels, such as in a frequency hopping communication system and/or the like.