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公开(公告)号：US10595293B2
公开(公告)日：2020-03-17
申请号：US16216118
申请日：2018-12-11
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). The gap length 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：US20190253219A1
公开(公告)日：2019-08-15
申请号：US16241660
申请日：2019-01-07
Applicant: QUALCOMM Incorporated
Inventor： Zhifei Fan , Xiaoxia Zhang , Jing Sun , Tamer Kadous , Qingjiang Tian
CPC classification number: H04L5/0053 , H04L5/001 , H04L5/0037 , H04L5/0044 , H04L5/0092 , H04L27/206 , H04W16/14 , H04W74/08
Abstract: Methods, systems, and devices for wireless communications are described. One method may include receiving, by a user equipment (UE) from a base station, a resource allocation indicator corresponding to a total number of resource elements to allocate for uplink control information within a resource allocation of a shared data channel. The UE may determine anchor resources within the resource allocation, and determine a plurality of transmission parameters for an autonomous uplink transmission based on the total number of resource elements. The UE may transmit, to the base station, the uplink control information within the anchor resources to indicate the plurality of transmission parameters for the autonomous uplink transmission.
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公开(公告)号：US10326559B2
公开(公告)日：2019-06-18
申请号：US15485656
申请日：2017-04-12
Applicant: QUALCOMM Incorporated
Inventor： Zhifei Fan , Xiaoxia Zhang , Taesang Yoo , Jing Sun , Juan Montojo
Abstract: A base station may provide both an uplink grant and a downlink grant in a same transmission time interval (TTI), and may provide an indication in the uplink grant that the TTI includes the downlink grant. A user equipment (UE) that receives the uplink grant may provide feedback using identified feedback resources in an uplink shared channel, and other uplink transmissions may be rate matched around the feedback resources in the uplink shared channel. A base station receiving the feedback may monitor the feedback resources to determine whether the downlink grant or one or more of the downlink transmissions were successfully received at the UE. A base station, in some examples, may monitor different sets of resources to determine whether certain of the uplink grant, downlink grant, downlink transmissions associated with the downlink grant, or any combinations thereof, have been successfully received at the UE.
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公开(公告)号：US20190124598A1
公开(公告)日：2019-04-25
申请号：US16162185
申请日：2018-10-16
Applicant: QUALCOMM Incorporated
Inventor： Seyed Ali Akbar Fakoorian , Xiaoxia Zhang , Taesang Yoo , Zhifei Fan
Abstract: Methods, systems, and devices for wireless communications are described. A base station may determine a set of power control parameters for a user equipment (UE) to use in different power control loops. The base station may indicate a power control process for the UE to perform in downlink control information. The UE may identify a subset of the power control parameters to use in a power control loop for the indicated process. In some examples, the power control parameters may be for different sounding reference signal processes, such as uplink channel sounding, downlink channel sounding with channel reciprocity, or cross-link interference. In some other examples, the power control parameters may be for power control loops of different uplink channel configuration. The base station may convey the set of power control parameters to the UE by radio resource control signaling.
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公开(公告)号：US20180317186A1
公开(公告)日：2018-11-01
申请号：US15830760
申请日：2017-12-04
Applicant: QUALCOMM Incorporated
Inventor： Zhifei Fan , Taesang Yoo , Xiaoxia Zhang , Seyed Ali Akbar Fakoorian
CPC classification number: H04W56/001 , H04B7/0626 , H04J11/0053 , H04L27/2657 , H04L27/2675 , H04W56/0035
Abstract: Over-the-air phase synchronization for reciprocity-based coordinated multipoint (CoMP) joint transmission is discussed. The base stations of the CoMP group and served user equipment (UEs) each transmit phase synchronization reference signals (PSRS). The receiving nodes will compute co-phasing values representing the phase difference between pairs of the PSRS. For example, the difference between two downlink PSRS computed at the UE for a downlink co-phasing value, and the difference between a single PSRS received at two base stations computed at the base station for an uplink co-phasing value. The base stations of the CoMP group may determine a phase compensation by computing the differences between the uplink and downlink co-phasing values and use that phase compensation to adjust communications by the base stations in the CoMP group. In other aspects, the computed co-phasing values may be used to modulate each nodes transmission of its respective PSRS.
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Patent Agency Ranking
公开(公告)号：US20180098317A1
公开(公告)日：2018-04-05
申请号：US15712584
申请日：2017-09-22
Applicant: QUALCOMM Incorporated
Inventor： Sony Akkarakaran , Tao Luo , Xiaoxia Zhang , Zhifei Fan , Juan Montojo
CPC classification number: H04W72/0413 , H04L1/00 , H04L1/0026 , H04L1/16 , H04L1/1861 , H04L5/0007 , H04L5/0023 , H04L5/0053 , H04L5/0055 , H04L5/0057 , H04W72/0446 , H04W72/1242 , H04W72/1268 , H04W72/1284 , H04W76/27
Abstract: A method of wireless communication may include transmitting an uplink slot with a first control region, a second control region, and (e.g., optionally) a data region. Each region may include time resources and frequency resources. Transmitting the uplink slot may include transmitting the first control region in an earlier part of the uplink slot and transmitting the second control region (e.g., and the data region) in a later part of the uplink slot. The first control region may include time-critical control information and the second control region may include non-time-critical control information. A receiver receiving the uplink slot may receive the first control region before receiving the data region and the second control region.
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公开(公告)号：US20170289938A1
公开(公告)日：2017-10-05
申请号：US15474883
申请日：2017-03-30
Applicant: QUALCOMM Incorporated
Inventor： Taesang Yoo , Juan Montojo , Jing Sun , Zhifei Fan
CPC classification number: H04W56/007 , H04L5/001 , H04L5/1469 , H04W56/0005 , H04W72/044 , H04W72/12 , H04W74/002
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：US12295012B2
公开(公告)日：2025-05-06
申请号：US18433297
申请日：2024-02-05
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Zhifei Fan , Kapil Bhattad , Jing Sun , Tamer Kadous , Srinivas Yerramalli
IPC: H04W72/23 , H04L1/1607 , H04L1/1812 , H04L1/1822 , H04L1/1829 , H04L5/00
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.
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公开(公告)号：US12279246B2
公开(公告)日：2025-04-15
申请号：US17646985
申请日：2022-01-04
Applicant: QUALCOMM Incorporated
Inventor： Ahmed Abdelaziz Ibrahim Abdelaziz Zewail , Zhifei Fan , Jing Sun , Xiaoxia Zhang , Wooseok Nam , Tao Luo
Abstract: Aspects presented herein may enable a UE to limit MCS and/or K1 offset used for communicating with a base station to a threshold based at least in part on an SCS used for the communication. In one aspect, a UE limit at least one of an MCS to being less than or equal to an MCS threshold or a K1 offset to being greater than or equal to a K1 offset threshold based on a subcarrier spacing selected for communication with a base station, the K1 offset being a number of slots between receiving DL data and transmitting ACK/NACK feedback. The UE communicate with the base station based at least on one of the MCS being less than or equal to the MCS threshold or the K1 offset being greater than or equal to the K1 offset threshold.
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公开(公告)号：US12273292B2
公开(公告)日：2025-04-08
申请号：US17575363
申请日：2022-01-13
Applicant: QUALCOMM Incorporated
Inventor： Wooseok Nam , Xiaoxia Zhang , Ahmed Abdelaziz Ibrahim Abdelaziz Zewail , Zhifei Fan , Tao Luo , Jing Sun , Jun Ma
Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may measure a frequency selectivity of a channel between the UE and a base station and may transmit signaling to the base station indicating one or both of a frequency selectivity metric or a recommended demodulation reference signal (DMRS) port multiplexing pattern based on measuring the frequency selectivity. In some aspects, the UE may transmit the signaling to assist the base station in configuring a DMRS port multiplexing pattern based on current channel conditions. For example, if the frequency selectivity metric satisfies a threshold, the UE may recommend a DMRS port multiplexing pattern absent of code division multiplexing (CDM). Alternatively, if the frequency selectivity metric fails to satisfy the threshold, the UE may recommend a DMRS port multiplexing patter including CDM.
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