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：US20190342029A1

公开(公告)日：2019-11-07

申请号：US16517399

申请日：2019-07-19

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Aleksandar Damnjanovic ,  Marco Papaleo ,  Rahul Malik ,  Peter Gaal

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

Abstract: Techniques are described for wireless communication. A first method includes sensing an indication of first radio access technology (RAT) communications occupying a shared radio frequency spectrum band; and configuring, in response to the sensing, at least one parameter of a second RAT used by a device to contend for access to the band. A second method includes randomly selecting a number from a range of numbers extending between a lower bound and an upper bound; contending for access to a shared radio frequency spectrum band by performing an extended clear channel assessment (ECCA) procedure over a plurality of CCA slots, the plurality of CCA slots including a first number of CCA slots equal to the upper bound; and winning contention for access to the band after determining, while performing the ECCA procedure, that the band is available for a second number of CCA slots equal to the randomly selected number.

公开(公告)号：US10469185B2

公开(公告)日：2019-11-05

申请号：US15629483

申请日：2017-06-21

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Ravi Teja Sukhavasi ,  Makesh Pravin John Wilson ,  Kiran Kumar Somasundaram ,  Onkar Jayant Dabeer ,  Durga Prasad Malladi ,  Naga Bhushan ,  Yongbin Wei ,  Peter Gaal ,  Wanshi Chen ,  Hao Xu ,  Aleksandar Damnjanovic

IPC: H04W4/00 ,  H04B17/309 ,  H04W16/14 ,  H04W72/00 ,  H04W74/08 ,  H04W72/12

Abstract: The present disclosure, for example, relates to one or more techniques for scaling the bandwidth of a carrier. Available sub-channels of an unlicensed radio frequency spectrum band may be determined, and the available sub-channels may be included in the carrier. The available sub-channels may be adjacent or non-adjacent sub-channels. The bandwidth of the carrier may be determined according to which sub-channels are included in the carrier. In this way, the bandwidth of the carrier may be scaled according to the available sub-channels in the unlicensed radio frequency spectrum band.

公开(公告)号：US20190335427A1

公开(公告)日：2019-10-31

申请号：US16385897

申请日：2019-04-16

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Yongbin Wei

IPC: H04W72/04 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. A base station may transmit a first downlink control information block over a group physical downlink control channel (PDCCH), wherein the first downlink control information block identifies a plurality of user equipment (UEs) for performing aperiodic channel state information (C SI) measurements and an indication of CSI reference signal resources for a CSI reference signal. The base station may transmit the CSI reference signal on the indicated CSI reference signal resources. The UE may perform, in response to receiving the group PDCCH, an aperiodic CSI measurement of the CSI reference signal on the indicated CSI reference signal resources.

公开(公告)号：US20190334666A1

公开(公告)日：2019-10-31

申请号：US16394518

申请日：2019-04-25

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Srinivas Yerramalli ,  Tamer Kadous ,  Yongbin Wei

IPC: H04L5/00 ,  H04W16/14 ,  H04W48/08 ,  H04W74/00 ,  H04W72/14 ,  H04W74/08

Abstract: Wireless communications systems and methods related to providing frequency diversity for communications in an unlicensed spectrum are provided. A first wireless communication device communicates, with a second wireless communication device, an opportunistic frequency-switching configuration for a first frequency band and a second frequency band. The first frequency band and the second frequency band are shared by a first network operating entity and a second network operating entity. The first wireless communication device communicates, with the second wireless communication device, a first communication signal in a first frequency band based on the opportunistic frequency-switching configuration. The first wireless communication device switches from the first frequency band to a second frequency band based on the opportunistic frequency-switching configuration. The first wireless communication device communicates, with the second wireless communication device after the switching, a second communication signal in the second frequency band based on the opportunistic frequency-switching configuration.

公开(公告)号：US20190334577A1

公开(公告)日：2019-10-31

申请号：US16385943

申请日：2019-04-16

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Srinivas Yerramalli ,  Xiaoxia Zhang ,  Tamer Kadous ,  Yongbin Wei ,  Jing Sun ,  Andrei Dragos Radulescu

IPC: H04B1/7143 ,  H04B1/7156 ,  H04B1/7136 ,  H04L27/26

Abstract: Techniques providing opportunistic frequency switching for frame based equipment (FBE), such as may be configured to minimize opportunistic frequency switching delay in FBE new radio (NR) unlicensed (NR-U) networks and/or to provide frequency diversity FBE access based on offset sequences of medium sensing occasions for the carrier frequencies are disclosed. Within the FBE mode network, a base station may configure a pattern of sensing locations in each frame for each frequency transmission unit of the plurality of frequency transmission units, wherein an inter-unit delay of sensing locations between a first frequency transmission unit and a next adjacent frequency transmission unit and between a last frequency transmission unit and the first frequency transmission unit is a fixed duration. Opportunistic frequency switching of embodiments may utilize the medium sensing locations for opportunistically switching between a sequence of the frequency transmission units for implementing frequency diversity FBE access.

公开(公告)号：US10455614B2

公开(公告)日：2019-10-22

申请号：US14584149

申请日：2014-12-29

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/00 ,  H04L5/00 ,  H04W56/00 ,  H04W74/08 ,  H04L5/14 ,  H04L27/26

Abstract: Techniques are described for wireless communication. A first method includes transmitting a first signal to indicate accessing a first channel in a radio frequency spectrum band, and transmitting information with the first signal in the radio frequency spectrum band. A second method includes winning contention to access a radio frequency spectrum band, and after the winning contention to access the radio frequency spectrum band, transmitting a first signal to align a starting point of a second signal with a reference boundary associated with the radio frequency spectrum band. A third method includes winning contention to access a radio frequency spectrum band during a first frame period, the first frame selected from a plurality of different frame periods, and transmitting a signal at a periodicity during one or more subframes of the first frame period for each of the plurality of different frame periods.

公开(公告)号：US20190312763A1

公开(公告)日：2019-10-10

申请号：US16351302

申请日：2019-03-12

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04L27/10 ,  H04L1/00 ,  H04J13/00 ,  H04L27/26

Abstract: Flexible waveform synthesis is disclosed for new radio (NR) shared spectrum (NR-SS) networks. In order to accommodate variable transmission resources, a transmitter may construct an M×N grid to model a resource element (RE) map of transmission resources available to the transmitter within a shared communication channel, where M corresponds to a number of symbols for a scheduled physical signal and N corresponds to a number of tones of a transmission bandwidth for the transmitter. The transmitter may then map the M×N grid to the RE map and puncture one or more REs associated with the subbands unavailable for transmission in the transmission resources. The transmitter may then transmit a transmission according to the unpunctured REs of the RE map.

公开(公告)号：US20190306878A1

公开(公告)日：2019-10-03

申请号：US16281828

申请日：2019-02-21

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Zhifei Fan ,  Kapil Bhattad ,  Jing Sun ,  Tamer Kadous ,  Srinivas Yerramalli

IPC: H04W72/14 ,  H04L1/18 ,  H04L5/00 ,  H04W72/12

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) and a base station may communicate in an unlicensed spectrum (e.g., a shared radio frequency spectrum band). As such, the UE may determine a codebook size for transmitting hybrid access request (HARQ) acknowledgement (ACK) feedback with respect to the unlicensed spectrum. Accordingly, the UE may base the HARQ ACK codebook size on a number of HARQ processes with which the UE has been configured. Additionally or alternatively, the UE may base the HARQ ACK codebook size on a number and/or duration of downlink channel monitoring occasions indicated by the base station. In some cases, the UE may base the HARQ ACK codebook size on a combination of the techniques described herein.

公开(公告)号：US10433292B2

公开(公告)日：2019-10-01

申请号：US15598090

申请日：2017-05-17

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Naga Bhushan ,  Peter Gaal

IPC: H04W72/04 ,  H04W74/00 ,  H04W74/08

Abstract: Methods, systems, and devices are described for wireless communications. In one method, a clear channel assessment (CCA) may be performed at a base station to determine availability of an unlicensed spectrum. A first waveform may be transmitted to a set of user equipments (UEs) over the unlicensed spectrum when available. The first waveform may indicate a first time period and a second time period during which the base station has channel access over the unlicensed spectrum. A second waveform may be received from one or more UEs responsive to the first waveform. Each second waveform may be received over the unlicensed spectrum during the first time period and may indicate that the respective UE has channel access over the unlicensed spectrum to receive data from the base station during the second time period.