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公开(公告)号：US10187864B2
公开(公告)日：2019-01-22
申请号：US15474883
申请日：2017-03-30
Applicant: QUALCOMM Incorporated
Inventor： Taesang Yoo , Juan Montojo , Jing Sun , Zhifei Fan
Abstract: Methods, systems, and devices for wireless communication are described. A base station may establish a transmission gap between downlink (DL) and uplink (UL) transmissions on a shared radio frequency (RF) spectrum band using time division duplex (TDD). A length of the gap may be based at least in part on a maximum allowed length of a filler signal corresponding to a coverage area of the base station. To reserve the shared band, a user equipment (UE) may communicate the filler signal for a length of time that is based at least in part on the maximum allowed length and a geographic distance between the UE and the base station. UEs farther from the base station transmit the filler signal of shorter lengths before sending an UL transmission, so that the UL transmissions from different UEs arrive at the same time at the base station regardless of the geographic distance between the UEs.
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公开(公告)号：US20180324856A1
公开(公告)日：2018-11-08
申请号：US15885966
申请日：2018-02-01
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Taesang Yoo
CPC classification number: H04W74/0808 , H04W72/0453 , H04W74/0866
Abstract: Wireless communications systems and methods related to updating control information based on medium sensing are provided. A first wireless communication device communicates with a second wireless communication device, a first transmission grant for a transmission opportunity (TXOP) in a frequency band. The first wireless communication device performs medium sensing for the TXOP. The performing the medium sensing includes detecting a reservation signal for the TXOP. The first wireless communication device transmits, to the second wireless communication device, an updated transmission grant for the TXOP based on at least the first transmission grant and the medium sensing. The first wireless communication device transmits, to the second wireless communication device in the frequency band, data during the TXOP based on the updated transmission grant.
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公开(公告)号：US10123323B2
公开(公告)日：2018-11-06
申请号：US14862997
申请日：2015-09-23
Applicant: QUALCOMM Incorporated
Inventor： Siddhartha Mallik , Taesang Yoo , Jelena Damnjanovic , Aleksandar Damnjanovic , Arumugam Chendamarai Kannan , Yongbin Wei , Durga Prasad Malladi
Abstract: Various aspects described herein relate to communicating using dynamic uplink and downlink transmission time interval (TTI) switching in a wireless network. A notification can be received from a network entity of switching a configurable TTI from downlink communications to uplink communications. The configurable TTI can be one of a plurality of TTIs in a frame structure that allows dynamic switching of configurable TTIs between downlink and uplink communications within a frame. Additionally, uplink communications can be transmitted to the network entity during the configurable TTI based at least in part on the notification.
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公开(公告)号：US10098144B2
公开(公告)日：2018-10-09
申请号：US15713536
申请日：2017-09-22
Applicant: QUALCOMM Incorporated
Inventor： Makesh Pravin John Wilson , Tao Luo , Taesang Yoo , Xiaoxia Zhang , Heechoon Lee , June Namgoong , Bilal Sadiq , Wenjun Li
Abstract: A control resource region of an New Radio system slot structure may be separated into control resource sets, only some of which may be used for control transmissions. Aspects presented herein improve the efficient utilization of resources by enabling data transmission in resources of the DL control resource region and/or the UL control resource region. A UE receives an indication of a control resource set in a control resource region of a slot that may provide a control channel resource or a data channel resource and performs rate matching for data transmissions in the data channel based at least in part on the indication. The indication may be a semi-static indication, e.g., RRC signaling, of the control resource set.
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公开(公告)号：US10063324B2
公开(公告)日：2018-08-28
申请号：US15718538
申请日：2017-09-28
Applicant: QUALCOMM Incorporated
Inventor： Taesang Yoo , Tao Luo , Yongbin Wei
CPC classification number: H04B15/00 , H04L5/003 , H04W24/02 , H04W72/1226 , H05K999/99
Abstract: Suppression of serving cell transmissions directed to second-served UEs may improve channel estimation of a serving cell or a neighbor cell. This may include using scheduling information for second-served UEs to suppress serving cell signals intended for second-served UEs having overlapping MIMO transmissions. Alternatively, this scheduling information may aid in suppressing a serving cell signal for a second-served UE to improve channel estimation of a neighbor cell. Various embodiments described herein, include implementations and techniques to aid channel estimation, and signal scheduling information to a first-served UE to aid in suppression of serving cell signals for second-served UEs.
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Patent Agency Ranking
公开(公告)号：US20180220379A1
公开(公告)日：2018-08-02
申请号：US15878771
申请日：2018-01-24
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Taesang Yoo
CPC classification number: H04W52/243 , H04W16/14 , H04W52/244 , H04W52/346 , H04W52/36 , H04W52/38 , H04W52/383 , H04W72/0473 , H04W72/082 , H04W74/0808
Abstract: Wireless communications systems and methods related to interference management among communications of network operating entities of different power classes over a spectrum are provided. A first wireless communication device identifies a transmission opportunity (TXOP) in a spectrum shared by a plurality of network operating entities. The first wireless communication device is associated with a first network operating entity of the plurality of network operating entities. The first wireless communication device determines a first transmission power level. The first wireless communication device communicates, with a second wireless communication device associated with the first network operating entity based on the first transmission power level, data during the TXOP.
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公开(公告)号：US20180184463A1
公开(公告)日：2018-06-28
申请号：US15612435
申请日：2017-06-02
Applicant: QUALCOMM Incorporated
Inventor： Seyed Ali Akbar FAKOORIAN , Xiaoxia Zhang , Taesang Yoo , Juan Montojo
CPC classification number: H04W74/0875 , H04W16/14 , H04W74/006 , H04W74/0808
Abstract: Wireless communications systems and methods related to managing dynamic priority-based spectrum access are provided. A first wireless communication device transmits dynamic priority information for accessing a shared spectrum in a transmission opportunity (TXOP). The shared spectrum is shared by a plurality of network operating entities. The first wireless communication device is associated with a first network operating entity of a plurality of network operating entities. The dynamic priority information indicates an access priority of the first network operating entity among the plurality of network operating entities in the TXOP. The first wireless communication device communicates with a second wireless communication device associated with the first network operating entity in the TXOP based on the dynamic priority information.
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公开(公告)号：US20180167903A1
公开(公告)日：2018-06-14
申请号：US15830821
申请日：2017-12-04
Applicant: QUALCOMM Incorporated
Inventor： Zhifei Fan , Taesang Yoo , Dinkar Vasudevan
CPC classification number: H04W56/0035 , H04B1/403 , H04B7/024 , H04L5/0035 , H04L25/0202 , H04W56/0015
Abstract: Over-the-air (OTA) phase synchronization for reciprocity-based coordinated multipoint (CoMP) joint transmission is disclosed. Phase synchronization reference signals (PSRS) are transmitted within a CoMP operation that can be used to determine the phase drifts of the transmit and receive chains of the base stations. These phase drifts can then be used to obtain a relative phase drift between the uplink and downlink channels. When estimating the uplink channel from the sounding reference signals (SRS), the relative phase drift may be applied to estimate the downlink channel as well. The OTA phase synchronization may be performed with a user equipment (UE)-assisted or inter-base station procedures.
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公开(公告)号：US20180167848A1
公开(公告)日：2018-06-14
申请号：US15663461
申请日：2017-07-28
Applicant: QUALCOMM Incorporated
Inventor： Jing Lei , Taesang Yoo , Xiaoxia Zhang , Jing Sun , Tamer Kadous
Abstract: Channel reservation systems and methods are disclosed herein, which schedule transmissions on a shared radio medium that is shared by a plurality of licensed network operators. In embodiments, priority access is pre-assigned to the network and the method determines whether to send a transmission based at least on the transmitter's priority class as compared to another transmitter's priority class and to which transmitter the time slot of a signal is dedicated. In embodiments, priority access may not be preassigned to the network and pre-grants may be used in conjunction with CR-Ts and CR-Rs to determine whether a transmitter transmits.
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公开(公告)号：US20180146506A1
公开(公告)日：2018-05-24
申请号：US15637457
申请日：2017-06-29
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Juan Montejo , Taesang Yoo , Zhifei Fan
Abstract: Phase compensation in a new radio (NR) shared spectrum (NR-SS) coordinated multipoint (CoMP) environment is discussed. A base station may synchronize the phase between one or more additional base stations in a coordinated multipoint (CoMP) group serving one or more user equipments (UEs). This first synchronizing is performed prior to a current transmission opportunity between the CoMP group and the UEs. During transmission, a UE will sent a phase compensation reference signal (PCRS) to help with adjusting a phase drift that exceeds a predetermined threshold. The PCRS may be triggered by a signal from the base station or may be sent routinely by the UE. The UEs will transmit PCRS after each subframe, which the base stations use to adjust the phase.
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