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公开(公告)号：US20220264640A1
公开(公告)日：2022-08-18
申请号：US17658524
申请日：2022-04-08
Applicant: QUALCOMM Incorporated
Inventor： JING SUN , Xiaoxia Zhang , Taesang Yoo , Tamer Kadous , Yongbin Wei , Aleksandar Damnjanovic
Abstract: New radio (NR) transmission opportunity (TxOP) structure having flexible starting points are disclosed for wireless communications. When a typical listen before talk (LBT) procedure is performed, the transmitting node will not know ahead of time when the LBT will pass and, thus, when data transmissions can start. NR systems may include a mini-slot design for accommodating transmission units smaller than a slot. Aspects of the present disclosure provide for flexibly increasing the number of potential starting transmission boundaries depending on when the LBT pass is detected. Alternative aspects of the present disclosure determine the potential starting transmission points using a mini-slot based design, a floating slot based design, or a punctured slot based design with a code block group (CBG) level retransmission mechanism.
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公开(公告)号：US11388728B2
公开(公告)日：2022-07-12
申请号：US16190927
申请日：2018-11-14
Applicant: QUALCOMM incorporated
Inventor： Yisheng Xue , Xiaoxia Zhang , Aleksandar Damnjanovic , Weiliang Zeng , Tamer Kadous , Yongbin Wei
Abstract: Methods, systems, and devices for wireless communications are described. A transmitter may identify a contention window for a no-energy-detection protocol for determining a channel availability for a data transmission. After the contention window expires, the transmitter may send a request message to a receiver. The receiver may measure a quality of the request message against a request threshold and transmit a response message if the measured quality exceeds the request threshold. The transmitter may then measure a quality of the response message against a response threshold. If the measured quality exceeds the response threshold, the transmitter may initiate a data transmission with the receiver. If the quality falls below the response threshold or the response message is not received, the transmitter may adjust the contention window and reattempt the no-energy-detection protocol. The contention window may also be adjusted based on an acknowledgement message received after the data transmission.
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公开(公告)号：US11375381B2
公开(公告)日：2022-06-28
申请号：US17155894
申请日：2021-01-22
Applicant: QUALCOMM Incorporated
Inventor： Aleksandar Damnjanovic , Tevfik Yucek , Yongbin Wei
IPC: H04W16/14 , H04B17/318 , H04W24/10 , H04W84/12
Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a node may receive a configuration associated with measuring an energy level of a first frequency channel of an unlicensed radio frequency band, wherein the configuration indicates a set of measurement occasions during which the energy level is to be measured on the first frequency channel; measure the energy level on the first frequency channel in a first measurement occasion, of the set of measurement occasions, according to the configuration; and operate in association with a second frequency channel of the unlicensed radio frequency band based at least in part on measuring the energy level on the first frequency channel, wherein the second frequency channel is paired with the first frequency channel for the unlicensed radio frequency band. Numerous other aspects are provided.
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公开(公告)号：US11330503B2
公开(公告)日：2022-05-10
申请号：US16921617
申请日：2020-07-06
Applicant: QUALCOMM Incorporated
Inventor： Durga Prasad Malladi , Yongbin Wei , Tao Luo , Aleksandar Damnjanovic
Abstract: Techniques for transmitting and receiving wireless communications over an unlicensed radio frequency spectrum band are disclosed, including techniques for transmitting and receiving system information blocks over the unlicensed radio frequency spectrum band, techniques for gaining access to the unlicensed radio frequency spectrum band by performing extended clear channel assessments (ECCAs), techniques for transmitting and receiving synchronization signals and reference signals over the unlicensed radio frequency spectrum band, techniques for identifying starting times of downlink transmissions over the unlicensed radio frequency spectrum band, techniques for transmitting and receiving clear channel assessment (CCA)-exempt transmissions over the unlicensed radio frequency spectrum band, techniques for performing random access over the unlicensed radio frequency spectrum band, and techniques for dynamically modifying a transmission mode over the unlicensed radio frequency spectrum band.
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285.发明授权公开(公告)号：US11329788B2
公开(公告)日：2022-05-10
申请号：US16936247
申请日：2020-07-22
Applicant: QUALCOMM Incorporated
Inventor： Durga Prasad Malladi , Yongbin Wei , Wanshi Chen , Peter Gaal , Tao Luo
Abstract: Techniques are described for wireless communication. A first method includes generating uplink control information at a wireless device, and transmitting the uplink control information over an interlace of a component carrier of an unlicensed radio frequency spectrum band. The interlace includes a plurality of non-contiguous concurrent resource blocks in the unlicensed radio frequency spectrum band, and at least two resource blocks in the interlace include different portions of the uplink control information. A second method includes generating uplink control information at a wireless device, and transmitting the uplink control information over an uplink control channel of an unlicensed radio frequency spectrum band. Resources of the uplink control channel are divided into a plurality of discrete dimensions and the uplink control information of the wireless device is transmitted over a number of the discrete dimensions allocated to the uplink control information of the wireless device.
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Patent Agency Ranking
公开(公告)号：US11290896B2
公开(公告)日：2022-03-29
申请号：US13801358
申请日：2013-03-13
Applicant: QUALCOMM Incorporated
Inventor： Durga Prasad Malladi , Yongbin Wei , Peter Gaal , Hao Xu , Tao Luo , Tingfang Ji
Abstract: Systems and methods providing an enhanced new carrier type (eNCT) operable to adapt cells of a wireless communication network for opportunistic behavior that adapts to the geo-temporal traffic distribution are disclosed. Embodiments of eNCT operation provide for transmission of downlink common channels by cells employing eNCT techniques only when needed. Base stations implementing eNCT techniques herein may transition between two or more operational states, such as an active state wherein full base station functionality is performed and a dormant state wherein limited base station functionality is performed, based upon geo-temporal traffic distribution within the network. Thus, when a base station is not actively serving a user equipment (UE), the downlink transmission by the base station, and resulting interference, may be reduced or even eliminated.
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公开(公告)号：US11271703B2
公开(公告)日：2022-03-08
申请号：US14700965
申请日：2015-04-30
Applicant: QUALCOMM Incorporated
Inventor： Feng Xue , Tao Luo , Yongbin Wei
Abstract: Aspects described herein relate to modulating control data in wireless communications. First control data for a first device can be modulated in an enhancement layer of a control data resource based at least in part on whether the control data resource includes second control data for a second device, and transmitted over the control data resource. A signal can be received from an access point comprising at least one control data resource. One of a plurality of modulation schemes utilized to modulate the at least one control data resource and an associated layer can be determined. The signal can be demodulated according to the one of the plurality of modulation schemes and the layer to obtain control data in the at least one control data resource.
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公开(公告)号：US11265887B2
公开(公告)日：2022-03-01
申请号：US16566566
申请日：2019-09-10
Applicant: QUALCOMM Incorporated
Inventor： Yisheng Xue , Aleksandar Damnjanovic , Xiaoxia Zhang , Jing Sun , Yongbin Wei , Tamer Kadous
Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine that a serving base station of the UE has obtained access to a wireless channel of a shared radio frequency spectrum band during a transmission opportunity that is separate from a scheduled uplink transmission by the UE. The UE may perform, based at least in part on the determination, a clear channel assessment (CCA) procedure on the wireless channel during a designated quiet portion of the transmission opportunity. The UE may transmit an unsolicited CCA status report to the serving base station during the transmission opportunity based at least in part on the CCA procedure.
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公开(公告)号：US11202183B2
公开(公告)日：2021-12-14
申请号：US15187586
申请日：2016-06-20
Applicant: QUALCOMM Incorporated
Inventor： Alberto Rico Alvarino , Wanshi Chen , Seyed Ali Akbar Fakoorian , Hao Xu , Yongbin Wei
Abstract: Methods, systems, and devices for wireless communication are described. User equipment (UE) and base stations may support frequency hopping with fast retuning for enhanced machine type communication (eMTC). For example, a UE may need to retune portions of its receive or transmit chain to support operation on various frequency bands, and it may perform the retune within a few symbols. Both base station and UE may anticipate or account for the retuning delay and communicate accordingly. A base station may refrain from transmitting for a certain period of time, for example. A base station may also account for frequency hopping delays for uplink communications. Systems may employ other techniques to support eMTC. For example, UEs may leverage reference signal patterns in certain control channels for demodulation. In some cases, base stations may alter control channel transmissions to account for various types of UEs with in the system.
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公开(公告)号：US11197166B2
公开(公告)日：2021-12-07
申请号：US16871867
申请日：2020-05-11
Applicant: QUALCOMM Incorporated
Inventor： Aleksandar Damnjanovic , Andrei Dragos Radulescu , Yongbin Wei
Abstract: Synchronous communications mode detection is disclosed for unlicensed spectrum communications. To detect synchronous mode communications, an observing node monitors on-off transitions of communication transmissions on a shared communication spectrum. The observing node detects the on-off transition spacing of the on-off transitions over a sliding window of a detection period duration. The node may determine the number of candidate synchronous on-off transition spacings of the detected on-off transition spacings that are equal to an integer multiple of a synchronization period. If the number of candidate synchronous on-off transition spacings exceeds a threshold value the observing node will declare detection of a synchronous operation mode of the shared communication spectrum.
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