公开(公告)号：US10856300B2

公开(公告)日：2020-12-01

申请号：US16121162

申请日：2018-09-04

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Weiliang Zeng ,  Siddhartha Mallik ,  Aleksandar Damnjanovic ,  Tamer Kadous

IPC: H04W72/06 ,  H04W72/04 ,  H04W72/08 ,  H04W72/12 ,  H04L5/00 ,  H04L1/00 ,  H04B7/0417 ,  H04W74/08

Abstract: A per-transmit time interval (TTI) rank control within a transmission opportunity (TxOP) is described for downlink coordinated multiple point (CoMP) operations. In operation, a base station may determine rank and data rate for communication during a transmission opportunity (TxOP) at the beginning of the TxOP. Each TxOP may include a plurality of transmission time intervals (TTIs). For each TTI of the TxOP, the base station computes one or more channel quality indicator (CQI) back-offs using one or more outer loop adaptation processes per TTI, and updates rank and the data rate using the CQI back-offs. Once updated, the base station transmits the downlink data during each TTI according to the updated rank and the data rate.

公开(公告)号：US10856296B2

公开(公告)日：2020-12-01

申请号：US15980568

申请日：2018-05-15

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tamer Kadous ,  Chih-Hao Liu ,  Mostafa Khoshnevisan

IPC: H04W4/00 ,  H04W72/04 ,  H04L5/00 ,  H04B1/713 ,  H04W76/27 ,  H04W16/14 ,  H04W16/32 ,  H04W68/02 ,  H04W48/12

Abstract: Some techniques described herein assist a user equipment with acquiring and/or reacquiring, from a base station, a dynamic list of channels to be used for frequency hopping when communicating over an unlicensed radio frequency spectrum band, thereby increasing communication reliability and promoting coexistence in the unlicensed radio frequency spectrum band. Some techniques described herein also assist the user equipment in obtaining the list of channels with low latency (e.g., shortly after the list has changed) and with low power consumption. Numerous other aspects are provided.

公开(公告)号：US20200374941A1

公开(公告)日：2020-11-26

申请号：US16991811

申请日：2020-08-12

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Jing Sun ,  Tamer Kadous

IPC: H04W74/08 ,  H04W74/00

Abstract: Physical random access channel (PRACH) configuration on new radio unlicensed (NR-U) networks is disclosed. A UE may perform PRACH transmission either with a transmission opportunity (TXOP) or outside of a TXOP. The UE monitors for a control signal from a base station, such as a preamble or common control signal, identifying a TXOP. The UE may obtain an autonomous random access configuration for communications outside of the current TXOP that identifies a random access slot includes a plurality of random access occasions. If the UE fails to detect the control signal, it transmits an autonomous random access signal in a random access occasion corresponding to a beam direction of its location in relation to the base station. Otherwise, upon detection of the control signal and receipt of a trigger signal, the UE may transmit a random access request within the TXOP.

公开(公告)号：US10813136B2

公开(公告)日：2020-10-20

申请号：US16116855

申请日：2018-08-29

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Ozcan Ozturk ,  Peter Gaal ,  Tamer Kadous ,  Yongbin Wei

IPC: H04W76/27 ,  H04W52/38 ,  H04W74/08 ,  H04W72/04 ,  H04W52/36 ,  H04W52/34 ,  H04L5/00 ,  H04W84/04 ,  H04W88/06 ,  H04W88/08 ,  H04W16/14 ,  H04W8/24 ,  H04W76/15

Abstract: Aspects presented herein provide for dual connectivity with a standalone service provider in the unlicensed spectrum. A first base station may receive, from a UE, an indication of a capability for standalone operation in a first RAT that utilizes an unlicensed frequency spectrum and a dual connectivity capability involving the first RAT and a second RAT that utilizes a licensed frequency spectrum, wherein dual connectivity comprises the UE being connected to a master base station on a first frequency and a secondary base station on a second frequency at a same time. The first base station may signal a first set of procedures for dual connectivity when the level of support at the first base station is at higher layers of the first RAT and may signal a second set of procedures when the level of support at the first base station extends to lower layers of the first RAT.

公开(公告)号：US10805979B2

公开(公告)日：2020-10-13

申请号：US16193786

申请日：2018-11-16

Applicant: QUALCOMM Incorporated

Inventor： Kaushik Chakraborty ,  Rahul Malik ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W76/28 ,  H04W52/02 ,  H04W76/15

Abstract: Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support communications between a base station and a user equipment (UE) on multiple carriers. A UE may maintain a connection with a base station on a first carrier (e.g., an anchor carrier), and the UE may use a discontinuous reception (DRX) cycle on a second carrier. The DRX cycle may include scheduled on-durations during which the UE may monitor the second carrier for signaling from the base station. To reduce the power consumption at the UE associated with repeatedly monitoring scheduled on-durations, the base station may transmit wake-up signaling to the UE on the first carrier to identify the on-durations that include data from the base station. Accordingly, the UE may monitor these on-durations for the data and avoid monitoring other on-durations to limit power consumption.

公开(公告)号：US10784999B2

公开(公告)日：2020-09-22

申请号：US16209538

申请日：2018-12-04

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04L5/00 ,  H04W72/12 ,  H04B1/713 ,  H04W72/04 ,  H04W56/00 ,  H04W48/10 ,  H04W8/00 ,  H04W16/14 ,  H04B1/7136

Abstract: Techniques and apparatuses described herein facilitate narrowband communication within the unlicensed frequency spectrum by simultaneously transmitting (e.g., in adjacent channels) a plurality of anchor channels. For example, a base station may simultaneously transmit at least three anchor channels of 180 kHz each so that the 500 kHz minimum bandwidth requirement is satisfied. Furthermore, the techniques and apparatuses described herein provide discovery reference signal (DRS) structures to cause the different types of DRS to be repeated and/or transmitted on different anchor channels, which improves frequency diversity. Also, a synchronization signal of the anchor channels may be used to indicate a configuration of the anchor channels. Thus, synchronization in the NB-IoT-unlicensed (NB-IoT-u) spectrum is enabled, and efficiency is improved over synchronization using a single anchor channel.

公开(公告)号：US10750506B2

公开(公告)日：2020-08-18

申请号：US16721623

申请日：2019-12-19

Applicant: QUALCOMM Incorporated

Inventor： Nachiappan Valliappan ,  Ahmed Kamel Sadek ,  Peter Gaal ,  Tamer Kadous ,  Andrei Dragos Radulescu

IPC: H04W72/04 ,  H04L29/06 ,  H04L5/14 ,  H04L5/00 ,  H04W74/08

Abstract: Techniques for managing re-contention on a shared communication medium are disclosed. In order to facilitate re-contending for access to the communication medium, an access point may adjust one or more uplink transmission parameters associated with a triggering condition for invoking a contention timer. In addition or as an alternative, the access point may mute transmission on the communication medium during one or more symbol periods designated for transmission. In addition or as an alternative, the access point may configure a timing advance to create a re-contention gap.

公开(公告)号：US20200260438A1

公开(公告)日：2020-08-13

申请号：US16863265

申请日：2020-04-30

Applicant: QUALCOMM Incorporated

Inventor： Tao LUO ,  Jing Sun ,  Sony Akkarakaran ,  Tamer Kadous ,  Xiao Feng Wang ,  Akula Reddy

IPC: H04W72/04 ,  H04L1/00 ,  H04L5/00 ,  H04B7/0452

Abstract: When a base station is capable of using multiple different types of waveforms for a downlink communication to a UE, the UE may waste processing resources attempting to receive and/or process the downlink communication. For example, the UE may cycle through various possible types of waveforms in an attempt to process the downlink communication. Techniques described herein use waveform signaling for downlink communications to notify the UE of a type of waveform being used for a downlink communication, thereby conserving UE resources (e.g., processing resources, memory resources, RF resources, and/or the like) that would otherwise be wasted attempting to process the downlink communication using multiple types of waveforms.

公开(公告)号：US10742353B2

公开(公告)日：2020-08-11

申请号：US16376895

申请日：2019-04-05

Applicant: QUALCOMM Incorporated

Inventor： Jamie Menjay Lin ,  Siddhartha Mallik ,  Tamer Kadous

IPC: H04L1/18 ,  H04L1/00 ,  H04L5/00 ,  H04L5/02 ,  H04L27/26

Abstract: Methods, systems, and devices for wireless communications are described. In accordance with the described techniques, communicating devices (e.g., an encoder and decoder) may apply an orthogonal cover code to a polar codeword to reduce cross-correlation between different codewords. For example, such techniques may reduce power consumption at a decoding device by providing for earlier decoding termination (e.g., as a result of the reduced cross-correlation). Techniques for generating the cover codes (e.g., on a per-aggregation level basis) and applying the cover codes (e.g., within a search space) are described. Additionally or alternatively, the described techniques may relate to seeding of reference signals used to support decoding of the codewords. Improved orthogonality between reference signal seeds may further suppress codeword recipient ambiguity.

公开(公告)号：US10716013B2

公开(公告)日：2020-07-14

申请号：US15909856

申请日：2018-03-01

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Tamer Kadous

IPC: H04W16/28 ,  H04L5/00 ,  H04B7/06 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communication are described for transmitting a first signal corresponding to a symbol so as to cover a geographic sector with via analog beamforming, transmitting, using analog beamforming and a second port, a second signal corresponding to the symbol, wherein aspects of the symbol are phase modulated with respect to the first signal such that corresponding aspects of a combined signal are beam-formed in one or more directions that at least partially overlap the geographic sector, a receiver receives the combined signal and from it determines a preferred refined beam for subsequent transmissions and transmits an indicator that includes the preferred refined beam, and the transmitter receives an indication from a receiver identifying one or more aspects of the combined signal, and determining a refined beam for subsequent transmissions based at least in part on the indication.