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公开(公告)号：US10820252B2
公开(公告)日：2020-10-27
申请号：US16249741
申请日：2019-01-16
Applicant: QUALCOMM Incorporated
Inventor： Madhavan Srinivasan Vajapeyam , Aleksandar Damnjanovic , Peter Gaal , Tao Luo , Amir Aminzadeh Gohari , Masato Kitazoe
Abstract: Methods, systems, and devices for radio resource management (RRM) measurement and reporting for license assisted access (LAA) cells operating in unlicensed or shared frequency spectrum are described. A user equipment (UE) may receive an RRM measurement configuration including a channel occupancy parameter for measuring neighbor cells of a shared frequency band. The channel occupancy parameter may be used to determine a channel occupancy metric that may be sent to a base station for cell selection. The channel occupancy metric may include an averaged or filtered received signal strength and may be reported for serving cells and/or intra-frequency neighbor cells. A base station may further configure a UE with a discovery reference signals (DRS) measurement timing configuration (DMTC), which may include an extended DMTC search window. The UE may search for DRS transmissions from neighbor cells according to the DMTC.
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公开(公告)号：US10812982B2
公开(公告)日：2020-10-20
申请号：US15416923
申请日：2017-01-26
Applicant: QUALCOMM Incorporated
Inventor： Srinivas Yerramalli , Tao Luo , Peter Gaal , Aleksandar Damnjanovic
Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) operating in unlicensed spectrum may determine that a base station is not transmitting during a particular time period (e.g., by detecting the absence of a control signal). The UE may then perform a listen-before-talk (LBT) procedure and, if the channel is available, may perform an autonomous uplink (UL) transmission. The autonomous UL transmission may include control information to facilitate decoding. Thus, the base station may receive the control information, and decode the rest of the autonomous UL transmission accordingly. The base station may configure the UE for autonomous UL transmissions when the radio link is established, and may also send dynamic configuration information to initiate, suspend, or reconfigure parameters for autonomous UL transmissions.
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213.发明授权公开(公告)号：US10812214B2
公开(公告)日：2020-10-20
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
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.
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公开(公告)号：US10764912B2
公开(公告)日：2020-09-01
申请号：US14847739
申请日：2015-09-08
Applicant: QUALCOMM Incorporated
Inventor： Madhavan Srinivasan Vajapeyam , Jelena Damnjanovic , Aleksandar Damnjanovic , Onkar Jayant Dabeer
Abstract: Various aspects described herein relate to communicating a scheduling request (SR) in a wireless network. A frame structure that allows dynamic switching of transmission time intervals (TTI) between uplink and downlink communications may be used to communicate with a network entity. At least one SR mode can be selected for SR transmission to the network entity in one or more of the TTIs configured for uplink communications based at least in part on the frame structure. The SR can be transmitted to the network entity in at least one uplink TTI of the one or more TTIs configured for uplink communications based at least in part on the at least one SR mode.
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215.发明授权公开(公告)号：US10750494B2
公开(公告)日：2020-08-18
申请号：US15067554
申请日：2016-03-11
Applicant: QUALCOMM Incorporated
Inventor： Wanshi Chen , Peter Gaal , Shimman Arvind Patel , Hao Xu , Aleksandar Damnjanovic
Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may establish a configuration for at least one carrier based on multiple transmission time interval (TTI) lengths. Several TTI lengths may be associated in a TTI group, and aspects of the configuration may be the same for all TTIs having a TTI length in the TTI group. The device may then communicate using the carrier configuration based on the TTI group. In some cases, a second TTI group with different TTI lengths from the first group may also be identified, and the device may communicate using TTI from the second group using a different TTI group configuration. Aspects of a TTI group configuration may include a common control channel format, resource allocation granularity, hybrid automatic repeat request (HARQ) process, HARQ timing, soft buffer size, channel state information (CSI) reporting configuration, or an uplink control channel.
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Patent Agency Ranking
公开(公告)号：US10727983B2
公开(公告)日：2020-07-28
申请号：US14861662
申请日：2015-09-22
Applicant: QUALCOMM Incorporated
Abstract: Methods, systems, and apparatuses for enabling and utilizing variable length transmission time intervals (TTI) are described. Latency for communications between base stations and user equipment (UEs) may be reduced by flexibly and dynamically adapting to data traffic needs. TTI for a given UE may be dynamically adjusted according to UE or system requirements and the configuration of uplink and downlink TTI. A base station may utilize dynamic grants to schedule resources within a system. A UE may receive a grant in a first portion of a variable TTI. The UE may determine a duration of the variable TTI based on the grant, and the UE may communicate accordingly. The UE may receive a subsequent grant in the variable TTI—either in the first portion or another portion—and may respond or alter its operation accordingly.
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公开(公告)号：US10715301B2
公开(公告)日：2020-07-14
申请号：US15637497
申请日：2017-06-29
Applicant: QUALCOMM Incorporated
Inventor： Xiaoxia Zhang , Taesang Yoo , Siddhartha Mallik , Juan Montojo , Aleksandar Damnjanovic
Abstract: Wireless communications systems and methods related to sharing a frequency-division duplexing (FDD) spectrum among multiple network operating entities. In one embodiment, a first wireless communication device communicates, with a second wireless communication device in a downlink (DL) frequency band, a reservation signal in a first channel sensing time slot of a frame to reserve a transmission time slot in the frame. The first wireless communication device communicates, in an uplink (UL) frequency band, an UL control signal in the first channel sensing time slot. The UL frequency band and the DL frequency band are shared by a plurality of network operating entities for frequency-division duplexing (FDD) communications. In another embodiment, a first wireless communication device communicates, in a first frequency band of a FDD network shared by a plurality of network operating entities, a reservation signal to reserve the first frequency band for time-division duplexing (TDD) communications.
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218.发明申请公开(公告)号：US20200221498A1
公开(公告)日：2020-07-09
申请号：US16723902
申请日：2019-12-20
Applicant: QUALCOMM Incorporated
Inventor： Yisheng Xue , Xiaoxia Zhang , Aleksandar Damnjanovic , Jing Sun , Yongbin Wei
Abstract: New radio (NR) unlicensed (NR-U) operations are discussed with channel occupancy time (COT) multiple downlink-uplink switching opportunities supported by an active channel indication. A network node that initiates a COT for transmissions may identify a within-channel occupancy time (COT) scheduled downlink-uplink switching configuration. After beginning transmissions on the COT, the node receives an active channel indication from one or more additional network nodes. In response to the active channel indication, the node may then perform communications with the node from which the active channel indication is received according to the within-COT scheduled downlink-uplink switching configuration for the current COT on a shared communication channel.
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公开(公告)号：US10687358B2
公开(公告)日：2020-06-16
申请号：US15808222
申请日：2017-11-09
Applicant: QUALCOMM Incorporated
Inventor： Ahmed Sadek , Aleksandar Damnjanovic , Yisheng Xue , Michael Mingxi Fan
IPC: H04W16/14 , H04W72/04 , H04W74/08 , H04L12/413
Abstract: An opportunistic asynchronous operation for coordinated new radio (NR) shared spectrum (NR-SS) operations is discussed. In a wireless network having at least one contention-based shared channel in which communications are configured having one or more control intervals time division multiplexed with one or more data intervals for transmission opportunities, a base station receives data for communication at a time during a current data interval on a contention-based shared channel. The base station will review its received signals on the contention-based shared channel during the previous control interval located immediately prior to the current data interval. If none of the received signals indicate a contention-resolution of the contention-based shared channel, the base station may begin an attempted transmission by performing an abbreviated clear channel assessment (CCA). If the CCA is detected as clear, the data may be transmitted.
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公开(公告)号：US10681733B2
公开(公告)日：2020-06-09
申请号：US15649074
申请日：2017-07-13
Applicant: QUALCOMM Incorporated
Inventor： Siddhartha Mallik , Taesang Yoo , Jing Sun , Anastasios Stamoulis , Aleksandar Damnjanovic , Juan Montojo
Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) or base station communicating in an unlicensed radio frequency spectrum band may transmit a signal (e.g., a request-to-send (RTS) or clear-to-send (CTS) signal) in a licensed radio frequency spectrum band to decrease the likelihood that neighboring devices will transmit interfering communications. Specific resources may be designated in the licensed radio frequency spectrum band for transmitting these signals, and these resources may be associated with specific unlicensed channels. Signaling in the licensed radio frequency spectrum band may also carry an indication of the unlicensed channel being used or other information relevant to the unlicensed communication. The RTS/CTS signaling in licensed radio frequency spectrum band may be transmitted during a downlink transmit opportunity or an uplink transmit opportunity, or both. Different energy detection thresholds may apply to RTS/CTS signals in licensed and unlicensed spectrum.
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