公开(公告)号：US10097255B2

公开(公告)日：2018-10-09

申请号：US14959671

申请日：2015-12-04

Applicant: QUALCOMM Incorporated

Inventor： Juergen Cezanne ,  Muhammad Nazmul Islam ,  Krishna Kiran Mukkavilli ,  Sundar Subramanian ,  Junyi Li

IPC: H04W4/00 ,  H04B7/06 ,  H04L5/00 ,  H04L25/02 ,  H04J13/00 ,  H04L27/26

Abstract: Described herein are methods, systems, and apparatus for jointly estimating channel and phase noise in a control symbol. In one example, a method for wireless communication is described that includes inserting a control tone at a first periodicity in a first subcarrier of a control symbol and inserting a pilot tone at a second periodicity in a second subcarrier of the control symbol, the pilot tone being offset from the control tone in the control symbol. The method also includes transmitting the control symbol. In another example, a method for wireless communication is described that includes receiving a control symbol comprising a control tone at a first periodicity, and a pilot tone at a second periodicity, the pilot tone being offset from the control tone in the control symbol. The method also includes performing a phase noise estimation and a channel estimation from the pilot tone.

公开(公告)号：US10069555B2

公开(公告)日：2018-09-04

申请号：US15474802

申请日：2017-03-30

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Tao Luo ,  Juergen Cezanne ,  Sundar Subramanian ,  Ashwin Sampath ,  Bilal Sadiq ,  Junyi Li

IPC: H04B7/06 ,  H04L5/00

Abstract: A first apparatus may communicate with a user equipment through a first active beam. The first apparatus may determine that beam tracking is to be performed with the UE, including identifying a new beam for communication between the UE and the apparatus. The first apparatus may perform beam tracking with the UE based on the determination that beam tracking is to be performed. The first apparatus may communicate with the UE through a second active beam based on the beam tracking.

公开(公告)号：US20180219660A1

公开(公告)日：2018-08-02

申请号：US15826612

申请日：2017-11-29

Applicant: QUALCOMM Incorporated

Inventor： Juergen Cezanne ,  Vasanthan Raghavan ,  Bilal Sadiq ,  Sundar Subramanian ,  Ashwin Sampath ,  Junyi Li

IPC: H04L5/00 ,  H04L27/26

CPC classification number: H04L5/0048 ,  H04B7/0408 ,  H04L5/0007 ,  H04L5/001 ,  H04L5/0016 ,  H04L27/2613 ,  H04L27/2626 ,  H04L27/2647 ,  H04W72/04

Abstract: Techniques are described for wireless communication. A method of wireless communication at a first wireless device includes identifying a template mapping of a plurality of ports to a first plurality of frequency subcarriers and a first plurality of time periods of a template time-frequency resource grid; mapping a plurality of resource elements of an orthogonal frequency-division multiplexing (OFDM) time-frequency resource grid to the plurality of ports based at least in part on the template mapping; receiving a reference signal from a second wireless device, on a subset of the plurality of ports, based at least in part on the mapping; and decoding the reference signal from a subset of the plurality of resource elements based at least in part on the mapping. In some cases, each port of the plurality of ports is associated with a corresponding radio frequency (RF) chain.

公开(公告)号：US10004050B2

公开(公告)日：2018-06-19

申请号：US14285499

申请日：2014-05-22

Applicant: QUALCOMM Incorporated

Inventor： Jung H. Ryu ,  Sundar Subramanian ,  Ashwin Sampath ,  Junyi Li

IPC: H04W4/00 ,  H04W56/00 ,  H04L12/26 ,  H04B7/0404 ,  H04B7/0408 ,  H04B7/08

CPC classification number: H04W56/001 ,  H04B7/0404 ,  H04B7/0408 ,  H04B7/0834 ,  H04L43/04 ,  H04W56/0075

Abstract: A method, an apparatus, and a computer program product for operating a user equipment (UE) are provided. The apparatus receives first information from a first millimeter-wave base station (mwB), determines second information based on the received first information, and transmits the second information to at least one other mwB. The first information and the second information are related to synchronization and/or a network state between the first mwB and the at least one other mwB.

公开(公告)号：US20180132252A1

公开(公告)日：2018-05-10

申请号：US15664499

申请日：2017-07-31

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Sundar Subramanian ,  Junyi Li ,  Juergen Cezanne ,  Navid Abedini ,  Bilal Sadiq ,  Tao Luo ,  Ashwin Sampath

IPC: H04W72/08 ,  H04W72/04

CPC classification number: H04W72/085 ,  H04B7/0617 ,  H04W16/28 ,  H04W36/06 ,  H04W36/32 ,  H04W52/0216 ,  H04W72/046 ,  H04W72/048 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/20 ,  Y02D70/24 ,  Y02D70/444

Abstract: Techniques are described for wireless communication. One method includes exchanging one or more signals between a first wireless node and a second wireless node and determining, at the first wireless node and based at least in part on the one or more signals, a range of correspondence between at least one of a transmit beam of the first wireless node and a receive beam of the first wireless node.

公开(公告)号：US20180098355A1

公开(公告)日：2018-04-05

申请号：US15427839

申请日：2017-02-08

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Junyi Li ,  Sundar Subramanian ,  Jung Ryu

IPC: H04W74/08 ,  H04W76/02 ,  H04W24/08

CPC classification number: H04W74/0808 ,  H04W24/08 ,  H04W74/0816 ,  H04W76/10

Abstract: Techniques for procedures using request to send/clear to send (RTS/CTS) procedures and multiple timers are described. A RTS/CTS procedure using multiple timers may use a first timer and a second timer. The first timer may be associated with a duration to transmit and receive a request to send (RTS) message and a clear to send (CTS) message. The second timer may be associated with a duration to transmit a data message. A network device may transmit a RTS message to request communication resources to transmit data. If the CTS message is not received prior to the expiration of the first timer, neighboring network devices may determine that the communication resources were not allocated and may attempt to request the newly available resources. If a CTS message is received, the network device may communicate the second timer data to the neighboring network devices in a variety of ways.

公开(公告)号：US20180097591A1

公开(公告)日：2018-04-05

申请号：US15690820

申请日：2017-08-30

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Navid Abedini ,  Bilal Sadiq ,  Sundar Subramanian ,  Junyi Li

IPC: H04L5/00 ,  H04W74/08 ,  H04W72/00 ,  H04W72/04

Abstract: A RACH preamble is transmitted from a UE using multiple antenna ports. A UE splits a data stream containing a RACH preamble into multiple streams corresponding to a same number of antenna ports of the UE. The UE multiplexes the copies of the RACH preamble according to a multiplexing scheme that enables a receiving eNB to discern the different channels used to transmit the signal from the different antenna ports. A RACH procedure is further accomplished in two steps instead of four by the UE then splitting a RACH payload to the same number of streams and multiplexing the RACH payload for transmission to the eNB. The eNB receives both transmissions, and may use the RACH preamble as a reference signal, and responds with a combined message with control information, random access response, and contention resolution information.

公开(公告)号：US20180091204A1

公开(公告)日：2018-03-29

申请号：US15618815

申请日：2017-06-09

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Bilal Sadiq ,  Ashwin Sampath ,  Sundar Subramanian ,  Junyi Li ,  Vasanthan Raghavan

IPC: H04B7/06 ,  H04W72/04 ,  H04L5/00 ,  H04W24/10

CPC classification number: H04B7/0617 ,  H04B7/0456 ,  H04B7/0621 ,  H04B7/0695 ,  H04L5/0048 ,  H04W16/28 ,  H04W24/10 ,  H04W72/046 ,  H04W88/02

Abstract: Methods, systems, and devices for wireless communication are described. A network device, such as a base station, may transmit a set of reference symbols to a user equipment (UE). Each set of reference symbols may include two (or more) beamformed signals. The network device may receive, based on the set of reference symbols, a measurement report from the UE. The measurement report may include a co-phasing indicator associated with the set of reference symbols. The network device may identify, based at least in part on the measurement report, an antenna port precoder configuration to use for communicating with the UE.

公开(公告)号：US20180063843A1

公开(公告)日：2018-03-01

申请号：US15637409

申请日：2017-06-29

Applicant: QUALCOMM Incorporated

Inventor： Sony Akkarakaran ,  Tao Luo ,  Wenjun Li ,  Atul Maharshi ,  Sundar Subramanian

IPC: H04W72/04 ,  H04W16/10 ,  H04W72/08 ,  H04W72/12

CPC classification number: H04W72/0453 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0094 ,  H04W16/10 ,  H04W72/04 ,  H04W72/0446 ,  H04W72/085 ,  H04W72/12 ,  H04W72/1231 ,  H04W74/002

Abstract: Wireless communications systems and methods related to allocating resource blocks and resource block groups in a system band in order to reduce overhead associated with resource allocation. To reduce overhead, the wireless communication device communicates a signal in a control channel that indicates a general area and a resource block in the general area that stores data. The wireless communication device then communicates multiple resource blocks that include the resource block and communicates the data in the resource block using the signal. To reduce overhead, the wireless communication device also communicates multiple mappings for each resource block group into a set of resource blocks and a signal in a control channel that selects one of the multiple mappings. The communication device then determines resource blocks that are included in the resource block group according to the mapping, and communicates data in these resource blocks.

公开(公告)号：US20180049167A1

公开(公告)日：2018-02-15

申请号：US15674168

申请日：2017-08-10

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Sundar Subramanian ,  Junyi Li ,  Navid Abedini ,  Bilal Sadiq

IPC: H04W72/04 ,  H04W72/02 ,  H04W56/00

CPC classification number: H04W74/0833 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/063 ,  H04B7/0695 ,  H04B7/088 ,  H04B7/2665 ,  H04B7/2668 ,  H04B7/2671 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04W16/28 ,  H04W48/20 ,  H04W56/00 ,  H04W56/001 ,  H04W72/02 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/046 ,  H04W72/085 ,  H04W72/1236 ,  H04W88/02 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a downlink (DL) signal from a base station on DL beam(s). The UE may identify a selected DL beam of the DL beam(s) for communications from the base station to the UE. The UE may transmit a random access channel (RACH) message to the base station using at least one of a resource or a RACH waveform selected based at least in part on the selected DL beam.