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公开(公告)号：US20210075579A1
公开(公告)日：2021-03-11
申请号：US16948094
申请日：2020-09-02
Applicant: QUALCOMM INCORPORATED
Inventor： Chih-Hao Liu , Jing Sun , Yisheng Xue , Xiaoxia Zhang
IPC: H04L5/00 , H04B1/7143 , H04W24/08 , H04W74/08 , H04W76/11
Abstract: Wireless communications systems and methods related to bandwidth part (BWP) hopping for interference mitigation are provided. A user equipment (UE) receives, from a base station (BS), a bandwidth part (BWP) configuration indicating a first BWP hopping pattern in a plurality of frequency subbands within a shared radio frequency band. The UE monitors for a first communication signal in a first frequency subband of the plurality of frequency subbands. The UE performs BWP hopping from the first frequency subband to a second frequency subband of the plurality of frequency subbands based on the first BWP hopping pattern. The UE monitors, after performing the BWP hopping, for a second communication signal in the second frequency subband.
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公开(公告)号：US10667143B2
公开(公告)日：2020-05-26
申请号：US15186407
申请日：2016-06-17
Applicant: QUALCOMM Incorporated
Inventor： Chih-Hao Liu , June Namgoong , Srikant Jayaraman
Abstract: Aspects of the present disclosure generally relate to techniques and apparatus that may help improve greatly reduce the implementation complexity of the ground station, and ground base-station user capacity by utilizing a subband beamformer for processing uplink signals received from aircraft at ground base stations, in an air-to-ground (ATG) system. The techniques presented herein may allow for dynamic subband allocation to different airborne devices with multi-user beamforming and subband combining.
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公开(公告)号：US10652914B2
公开(公告)日：2020-05-12
申请号：US16134534
申请日：2018-09-18
Applicant: QUALCOMM Incorporated
Inventor： Chih-Hao Liu , Srinivas Yerramalli , Tamer Kadous
Abstract: In an embodiment, an AP executes a CCA protocol to determine whether to begin transmission within a DMTC window of a radio frame having first and second blocks of subframes. The AP transmits a multi-subframe DRS within the DRS subframes that is scrambled in accordance with a CSI-RS scrambling rule that determines how the second DRS subframe is to be scrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes. At least one UE monitors the DMTC window, and descrambles the CSI-RSs in the multi-DRS subframe based on a CSI-RS descrambling rule that determines how the second DRS subframe is to be descrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes.
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公开(公告)号：US10609660B2
公开(公告)日：2020-03-31
申请号：US15949978
申请日：2018-04-10
Applicant: QUALCOMM Incorporated
Inventor： Chih-Hao Liu , Srinivas Yerramalli , Tamer Kadous
IPC: H04W56/00
Abstract: Methods, systems, and devices for wireless communication are described for synchronization for wideband coverage enhancement. A user equipment (UE) may receive a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in a subframe of a frame. In one example, the PSS may be received in each of a first plurality of consecutive symbols of the subframe. In another example, the SSS may be received in each of a second plurality of consecutive symbols of the subframe, wherein the second plurality of consecutive symbols is after the first plurality of consecutive symbols within the subframe. The UE may synchronize with a base station based at least in part on the PSS and the SSS received in the subframe. Numerous other aspects are provided.
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公开(公告)号：US20200021423A1
公开(公告)日：2020-01-16
申请号：US16507366
申请日：2019-07-10
Applicant: QUALCOMM Incorporated
Inventor： Chih-Hao Liu , Xiaoxia Zhang , Tamer Kadous , Srinivas Yerramalli
Abstract: Methods, systems, and devices for wireless communications are described that provide for selecting a time division duplexing (TDD) frame structure for communicating with a user equipment (UE) via a shared radio frequency spectrum in which a listen before talk (LBT) procedure is performed prior to transmitting. A frame based equipment (FBE) frame starting location for FBE frames is determined where the FBE frame starting location is offset from a starting location of the TDD frame structure and spans successive TDD frames. In some cases, the TDD frame structure may be configured such that the UE does not need to perform an LBT procedure, and thus the LBT process may be transparent to the UE, allowing UEs that are not specially configured to operate using an LBT procedure to use the shared radio frequency spectrum.
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Patent Agency Ranking
公开(公告)号：US10405228B2
公开(公告)日：2019-09-03
申请号：US15892183
申请日：2018-02-08
Applicant: QUALCOMM Incorporated
Inventor： Chih-Hao Liu , Srinivas Yerramalli , Andrei Dragos Radulescu , Tamer Kadous
Abstract: Configurations of system information blocks providing cell access information supporting wideband coverage enhancement in wireless communication networks are disclosed. Embodiments encode and transmit information elements for both a legacy system information block and a wideband coverage enhancement system information block in a multiple subframe discovery reference signal configuration. For example, embodiments may utilize a two subframe CR-DRS configuration in which a WCE SIB-MF1 message payload is encoded and transmitted independently with respect to a legacy SIB-MF1 message payload. Additionally, or alternatively, embodiment may utilize a two subframe CR-DRS configuration in which both a legacy SIB-MF1 message payload and a WCE SIB-MF1 message payload share the same DRS subframe payload by jointly encoding the legacy SIB-MF1 and WCE SIB-MF1 messages.
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公开(公告)号：US20190261382A1
公开(公告)日：2019-08-22
申请号：US16276101
申请日：2019-02-14
Applicant: QUALCOMM INCORPORATED
Inventor： Qingjiang Tian , Srinivas Yerramalli , Xiaoxia Zhang , Jing Sun , Chih-Hao Liu
Abstract: Indication of transmission priority class is disclosed for sharing a base station's maximum channel occupancy time (MCOT) for use in autonomous uplink (AUL). Aspects of the disclosure provide for implicitly sharing the MCOT by providing an indication of transmission opportunity (TxOP) length. A serving base station sends an indication of a current TxOP length in control signals to a user equipment (UE). The UE may then infer a set of potential transmission priorities used by the serving base station according to the TxOP length, as TxOP length may relate to the MCOT, which itself may be associated with a particular transmission priority class. The UE may then, conservatively, select the highest transmission priority of the set of potential transmission priorities for autonomously transmitting any uplink data having at least the selected highest transmission priority within configured AUL resource of the current TxOP.
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公开(公告)号：US20190238177A1
公开(公告)日：2019-08-01
申请号：US16255645
申请日：2019-01-23
Applicant: QUALCOMM Incorporated
Inventor： Chih-Hao Liu , Srinivas Yerramalli , Tamer Kadous
CPC classification number: H04B1/713 , H04B7/2643 , H04W72/044
Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a discovery reference signal from a base station on an anchor channel. The UE may perform a first random or pseudorandom frequency hopping procedure to identify a plurality of downlink carriers for a first time period. The UE may perform a second random or pseudorandom frequency hopping procedure within the plurality of downlink carriers to select one of the plurality of downlink carriers as the uplink channel for a second time period. The UE may then transmit an uplink communication during the second time period on the selected uplink channel. In some examples, the uplink communication may be transmitted based at least in part on time division multiplexing (TDM) information.
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179.发明申请公开(公告)号：US20190182826A1
公开(公告)日：2019-06-13
申请号：US16212402
申请日：2018-12-06
Applicant: QUALCOMM Incorporated
Inventor： Srinivas Yerramalli , Chih-Hao Liu , Tamer Kadous
Abstract: Methods, systems, and devices for wireless communications are described for multiplexing of uplink channels in a shared radio frequency spectrum band. Techniques may provide for segmenting uplink resources into multiple different sets of uplink resources, each set of uplink resources having one or more associated uplink control channel resources. A base station or user equipment (UE) may select a set of uplink resources from the multiple sets of uplink resources for uplink transmissions from the UE based on a location of the uplink control channel resources of the set of uplink resources relative to other allocated uplink resources of the UE. Uplink control information (UCI) may be multiplexed with one or more uplink shared channel transmissions of a UE for transmission to a base station in certain circumstances.
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公开(公告)号：US20190149190A1
公开(公告)日：2019-05-16
申请号：US16173945
申请日：2018-10-29
Applicant: QUALCOMM Incorporated
Inventor： Chih-Hao Liu , Srinivas Yerramalli , Tamer Kadous
IPC: H04B1/7143 , H04B1/7156 , H04W4/02 , H04W48/16
Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may identify synchronization signals and a set of frequency hopping channels for communications as part of a discovery reference signal (DRS) in an anchor channel. The set of frequency hopping channels may include a sequence to indicate an order for utilizing each hopping channel of the set of hopping channels. In some cases, the hopping sequence may be a pseudo random sequence. Additionally, the hopping sequence may defined such that a non-repeating hopping sequence or pattern which visits all hopping frequencies before revisiting the same frequency is utilized. As such, each hopping channel may be utilized an equal number of times within a period of time and have an approximately equal occupancy time to the other hopping channels.
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