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公开(公告)号：US11412503B2
公开(公告)日：2022-08-09
申请号：US15465498
申请日：2017-03-21
Applicant: QUALCOMM Incorporated
Inventor： Wanshi Chen , Peter Gaal , Hao Xu , Renqiu Wang , Tingfang Ji , Wei Zeng , Yi Huang
Abstract: Methods, systems, and devices for wireless communication are described for a data channel-referenced resource allocation for a control channel. In an implementation, a user equipment (UE) may identify, for a transmission time interval (TTI), a first uplink resource allocation to the UE of a first channel. The UE may determine, based at least in part on the first uplink resource allocation of the first channel, a second uplink resource allocation of a second channel to the UE. The UE may transmit, during the TTI, the first channel and the second channel.
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公开(公告)号：US11363572B2
公开(公告)日：2022-06-14
申请号：US15458017
申请日：2017-03-13
Applicant: QUALCOMM Incorporated
Inventor： Renqiu Wang , Hao Xu , Wei Zeng , Jing Jiang , Tingfang Ji
IPC: H04W72/04 , H04L5/00 , H04B17/336 , H04B7/0413 , H04L1/00 , H04L27/00
Abstract: Methods, systems, and devices for wireless communication are described A user equipment (UE) and a base station may support switching from one waveform to another on uplink channels. For example, a UE and a base station may utilize both frequency division multiplexing (SC-FDM) waveform and an orthogonal frequency division multiplexing (OFDM) waveforms based on channel conditions and other factors. In some examples, a UE may switch for some uplink channels, and use a single waveform for other channels. For example, switching waveforms for channels that utilize frequency domain code division multiplexing (CDM) channel may interrupt the orthogonality of multiplexed transmissions. A UE may transition from one waveform to another either autonomously or based on an explicit indication from a base station. If a UE switches autonomously, it may send an indication of the transition to the serving base station.
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公开(公告)号：US11357033B2
公开(公告)日：2022-06-07
申请号：US16835067
申请日：2020-03-30
Applicant: QUALCOMM Incorporated
Inventor： Yi Huang , Hao Xu , Wanshi Chen , Renqiu Wang , Joseph Binamira Soriaga , Peter Gaal , Seyong Park
Abstract: Aspects of the present disclosure provide for opportunistic uplink transmissions within a slot. In some examples, after scheduling all regular uplink transmissions within a current slot, a base station (e.g., gNB) may identify a set of unused uplink resources within the current slot and generate and transmit unused resource information identifying the set of unused resources to the user equipment (UE) within the cell served by the base station. If a particular UE is configured to operate in an opportunistic mode, the UE may utilize the unused resource information to generate and transmit an opportunistic uplink transmission within the set of unused uplink resources.
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公开(公告)号：US11323994B2
公开(公告)日：2022-05-03
申请号：US16837629
申请日：2020-04-01
Applicant: QUALCOMM Incorporated
Inventor： Wanshi Chen , Hao Xu , Michael Mao Wang , Peter Gaal
Abstract: Aspects of the present disclosure provide techniques that may be applied in systems to allow for communication over a control channel utilizing a relatively narrow band (e.g., six physical resource blocks) based search space. An exemplary method, performed by a user equipment, generally includes identifying, within a subframe, a first search space to monitor for a downlink control channel that occupies a first number of physical resource blocks (PRBs) that represents a narrowband size and monitoring at least the first search space for the downlink control channel transmitted in the subframe.
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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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Patent Agency Ranking
公开(公告)号：US20220060304A1
公开(公告)日：2022-02-24
申请号：US17454017
申请日：2021-11-08
Applicant: QUALCOMM INCORPORATED
Inventor： Jay Kumar Sundararajan , Renqiu Wang , Hao Xu , Naga Bhushan , Haitong Sun , Wanshi Chen
Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may transmit feedback, such as hybrid automatic repeat request (HARD) feedback for groups of code blocks rather than for an entire transport block or individual code blocks. The wireless device may transmit an acknowledgement (ACK) or negative-acknowledgement (NACK) to provide feedback for each code block group of a set of code block groups. An ACK may indicate that code blocks in a code block group were successfully decoded, and a NACK may indicate that at least one code block in a code block group was not successfully decoded. Wireless devices may support several techniques for grouping code blocks for feedback reporting to allow for efficient retransmissions and limited overhead. Different grouping schemes may be employed depending on system constraints, device capability, link conditions, or the like.
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公开(公告)号：US11252658B2
公开(公告)日：2022-02-15
申请号：US16532335
申请日：2019-08-05
Applicant: QUALCOMM Incorporated
Inventor： Sharad Sambhwani , Hao Xu , Durga Prasad Malladi
Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus operates in a first power mode with a first DL bandwidth in association with one of a radio resource control (RRC) idle state or an RRC connected state with a base station. The apparatus sets an inactivity timer and resets the inactivity timer upon receiving a DL assignment or an uplink grant. The apparatus transitions to a second power mode with a second DL bandwidth less than the first DL bandwidth upon expiration of the inactivity timer. Additionally, the apparatus monitors a set of symbols and a set of subcarriers of the second DL bandwidth for an activity indicator from the base station. The apparatus transitions from the second power mode to the first power mode upon receiving the activity indicator from the base station.
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公开(公告)号：US11239972B2
公开(公告)日：2022-02-01
申请号：US15802306
申请日：2017-11-02
Applicant: QUALCOMM Incorporated
Inventor： Alberto Rico Alvarino , Renqiu Wang , Peter Gaal , Wanshi Chen , Hao Xu
Abstract: Aspects of the present disclosure provide techniques and apparatus for performing narrowband physical random access channel (PRACH) procedures in large cells. For example, aspects of the present disclosure provide techniques for narrowband PRACH procedures (e.g., narrowband internet of things (NB-IoT)) to accommodate larger RTTs (e.g., up to 100 km). In some cases, supporting larger RTTs may involve a base station altering its PRACH processing by performing a two-step process of, first, obtaining a frequency domain phase offset based on an uplink signal from a UE, which provides a fractional delay and, second, performing a time domain correlation for different timing hypotheses to determine a timing offset based on the uplink signal. Supporting larger RTTs may also involve enabling a new NPRACH format that may coexist with legacy 3.75 kHz resources.
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公开(公告)号：US11228394B2
公开(公告)日：2022-01-18
申请号：US16765066
申请日：2018-09-24
Applicant: Kai Chen , Changlong Xu , Jing Jiang , Gabi Sarkis , Hao Xu , Qualcomm Incorporated
Inventor： Kai Chen , Changlong Xu , Jing Jiang , Gabi Sarkis , Hao Xu
Abstract: Methods, systems, and devices for wireless communications are described. In some systems, wireless devices may encode and decode transmissions using polar codes. A transmitting device may encode a payload based on a selected payload size. For example, the transmitting device may construct a bit vector including payload bits, parity bits, frozen bits, or some combination of these, and may modify the bits or the order of the bits based on the selected payload size. The device may generate a polar-encoded codeword based on this bit vector, and may transmit the polar-encoded codeword to a receiving device. The receiving device may blind decode the polar-encoded codeword, and may determine the correct payload size based on the decoded bit vector. For example, the device may perform decoding or may check decoded bits based on a payload size hypothesis, where the decoding may fail for any incorrect payload size hypothesis.
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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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