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公开(公告)号：US20210014098A1
公开(公告)日：2021-01-14
申请号：US17037124
申请日：2020-09-29
Applicant: QUALCOMM Incorporated
Inventor： Tianyang Bai , Juergen Cezanne , Sundar Subramanian , Junyi Li
Abstract: Methods, systems, and devices for wireless communications are described for phase error estimation and correction with sub-symbol resolution. A transmitting device may precode symbols (e.g., phase tracking reference signal (PT-RS) symbols) using a discrete Fourier transform (DFT). The transmitting device may map the DFT-precoded symbols to sets of adjacent subcarriers of a wireless signal, and may map other symbols to other subcarriers of the wireless signal. A receiving device may receive the wireless signal and may compare time domain representations of the DFT-precoded symbols with time domain representations of known reference symbols. The receiving device may estimate a phase error with sub-symbol resolution in the time domain based at least in part on the comparison, and may apply a phase correction in either the time or frequency domain to the other symbols.
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公开(公告)号：US10887035B2
公开(公告)日：2021-01-05
申请号：US15608799
申请日：2017-05-30
Applicant: QUALCOMM Incorporated
Inventor： Muhammad Nazmul Islam , Navid Abedini , Tao Luo , Sundar Subramanian , Juergen Cezanne , Ashwin Sampath , Alexei Yurievitch Gorokhov , Junyi Li , Bilal Sadiq
IPC: H01Q3/26 , H04B7/06 , H04B7/26 , H04J1/06 , H04L5/00 , H04B7/216 , H04J11/00 , H04L25/02 , H04L27/26 , H04W56/00 , H04L1/08 , H04L1/00
Abstract: The apparatus may be a base station. The apparatus processes a plurality of synchronization signals by performing time-division multiplexing (TDM) of at least one of a plurality of first synchronization signals of different types and at least one of the plurality of second synchronization signals of different types, the plurality of synchronization signals including the plurality of first synchronization signals and the plurality of second synchronization signals. The apparatus transmits the processed synchronization signals to a user equipment (UE).
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公开(公告)号：US10855390B2
公开(公告)日：2020-12-01
申请号：US16211207
申请日：2018-12-05
Applicant: QUALCOMM Incorporated
Inventor： Bilal Sadiq , Tao Luo , Juergen Cezanne , Navid Abedini , Krishna Kiran Mukkavilli , Muhammad Nazmul Islam , Sundar Subramanian , Ashwin Sampath
Abstract: Methods, systems, and devices for wireless communication are described. Some examples provide for identifying a primary synchronization signal (PSS) sequence of a synchronization subframe, determining, for the synchronization subframe, an extended synchronization signal (ESS) sequence based at least in part on the PSS sequence and transmitting the synchronization subframe. Other examples provide for generating an ESS sequence for a synchronization subframe to be communicated to a UE, scrambling the ESS sequence based at least in part on cell-specific information associated with the base station and transmitting, to the UE, the scrambled ESS sequence in the synchronization subframe.
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114.发明授权公开(公告)号：US10772078B2
公开(公告)日：2020-09-08
申请号：US15945663
申请日：2018-04-04
Applicant: QUALCOMM Incorporated
Inventor： Navid Abedini , Muhammad Nazmul Islam , Sundar Subramanian , Karl Georg Hampel , Juergen Cezanne , Junyi Li
Abstract: Certain aspects of the present disclosure generally relate to wireless communication. A wireless node may determine a connectivity state of the wireless node with respect to a wireless network, may determine a set of resources available for one or more synchronization communications based at least in part on the connectivity state, may select one or more resources from the set of resources, and may transmit the one or more synchronization communications using the one or more resources. Numerous other aspects are provided.
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公开(公告)号：US10715369B2
公开(公告)日：2020-07-14
申请号：US15975112
申请日：2018-05-09
Applicant: QUALCOMM Incorporated
Inventor： Tianyang Bai , Juergen Cezanne , Sundar Subramanian , Junyi Li
Abstract: At a receiver, errors may occur in estimating phase trajectory based on PT-RS due to a window effect. In order to address the problem of such errors, a transmitter determines at least one location for inserting PT-RS samples into a sequence of a plurality of samples, wherein a first set of the samples comprises a first number of samples at a beginning of the sequence and/or a second number of samples at an end of the sequence, and wherein the at least one location for the PT-RS samples is within a second set of the plurality of samples. The apparatus inserts the PT-RS samples into the sequence based on the determined at least one location and transmits a signal based on the inserted PT-RS samples. A receiver extracts the PT-RS samples and estimates phase errors for data samples in the received transmission based on the extracted PT-RS samples.
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Patent Agency Ranking
公开(公告)号：US10708953B2
公开(公告)日：2020-07-07
申请号：US15391425
申请日：2016-12-27
Applicant: QUALCOMM Incorporated
Inventor： Muhammad Nazmul Islam , Tao Luo , Juergen Cezanne , Sundar Subramanian , Junyi Li
Abstract: Aspects of the disclosure relate to improvements in random access procedures within a wireless communication network. To increase the likelihood that a user equipment (UE) will properly decode a random access response message from a base station, the base station may retransmit the random access response message one or more times. The number of retransmissions may be fixed or may be variable depending on whether the base station is able to receive or successfully decode a subsequently transmitted uplink message.
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公开(公告)号：US10708111B2
公开(公告)日：2020-07-07
申请号：US16301423
申请日：2017-02-14
Applicant: QUALCOMM Incorporated
Inventor： Muhammad Nazmul Islam , Sundar Subramanian , Juergen Cezanne , Junyi Li
Abstract: Various aspects of the disclosure relate to communicating random access information and uplink control information. In some aspects, a user equipment (UE) or other suitable apparatus transmits physical uplink control channel (PUCCH) information concurrently with random access channel (RACH) information transmitted by another UE or other apparatus. For example, the RACH access information and the PUCCH information may be frequency division multiplexed orthogonal tones. The disclosure relates in some aspects to using downlink-uplink (DL-UL) channel reciprocity to determine symbol and/or tone locations. For example, a base station or other suitable apparatus may initially sweep across different directions in different time slots to transmit signals during a synchronization sub-frame. A UE or other suitable apparatus can then find an appropriate RACH symbol from its best synchronization beam index and transmit PUCCH information in those symbols.
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公开(公告)号：US10701727B2
公开(公告)日：2020-06-30
申请号：US16017614
申请日：2018-06-25
Applicant: QUALCOMM Incorporated
Inventor： Karl Georg Hampel , Junyi Li , Sundar Subramanian , Muhammad Nazmul Islam , Navid Abedini , Juergen Cezanne
Abstract: Certain aspects of the present disclosure generally relate to wireless communication. A wireless node may receive a first scheduling command identifying a first resource allocation via a first link, may determine a second resource allocation based at least in part on the first resource allocation and a resource allocation policy, may transmit a second scheduling command identifying the second resource allocation via a second link, and may communicate network traffic on the first link and the second link using the first resource allocation and the second resource allocation, respectively. Numerous other aspects are provided.
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公开(公告)号：US10693605B2
公开(公告)日：2020-06-23
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
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.
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公开(公告)号：US10674540B2
公开(公告)日：2020-06-02
申请号：US16184825
申请日：2018-11-08
Applicant: QUALCOMM Incorporated
Inventor： Muhammad Nazmul Islam , Junyi Li , Sundar Subramanian , Jung Ryu
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.
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