公开(公告)号：US20200052870A1

公开(公告)日：2020-02-13

申请号：US16655095

申请日：2019-10-16

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Chih-Hao LIU ,  Tamer KADOUS

IPC: H04L5/14 ,  H04L1/00 ,  H04L5/00

Abstract: A method, an apparatus, and a computer program for wireless communication that allows for greater scheduling flexibility of physical resources are disclosed. A UE receives information from a base station about a time division duplex (TDD) frame structure of a plurality of frames that include a plurality of subframes. The UE determines a time division duplex (TDD) frame structure for a plurality of frames, where the plurality of frames include a plurality of uplink (UL) subframes and a plurality of downlink (DL) subframes. The UE determines whether a control signaling instance is scheduled during an UL subframe of the plurality of UL subframes, wherein the control signaling instance is scheduled periodically and the control signaling includes at least one of a random access channel, an uplink control channel, a sounding reference signal (SRS), or a scheduling request (SR). The UE communicates the control signaling instance if the control signaling instance is scheduled during an UL subframe.

公开(公告)号：US20190312704A1

公开(公告)日：2019-10-10

申请号：US16449249

申请日：2019-06-21

Applicant: QUALCOMM Incorporated

Inventor： Alberto RICO ALVARINO ,  Wanshi CHEN ,  Peter GAAL ,  Jing SUN ,  Hao XU ,  Srinivas YERRAMALLI

IPC: H04L5/00 ,  H04W56/00 ,  H04W72/04 ,  H04L5/14

Abstract: An apparatus may use inactive uplink portions of a downlink CC to transmit SRS to an eNB. At times there may be a collision between the SRS transmission and uplink transmissions or downlink transmissions on another CC. The apparatus receives a carrier aggregation configuration for a first downlink CC and a second CC, determines to transmit an uplink transmission on the second CC or to receive a downlink transmission on the second CC, determines that the SRS would at least partially collide with the uplink transmission or the downlink transmission, and determines to adjust at least one of the uplink transmission, the SRS transmission, or reception of the downlink transmission based on the determination of the collision and an interruption time to transmit the SRS in the uplink portion of the first CC.

公开(公告)号：US20190268940A1

公开(公告)日：2019-08-29

申请号：US16406563

申请日：2019-05-08

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Wanshi CHEN ,  Jing SUN ,  Peter GAAL

IPC: H04W74/08 ,  H04W28/02 ,  H04W76/28 ,  H04W16/14

Abstract: Various aspects described herein relate to reducing transmission latency in unlicensed spectrum. These latency reduction techniques include enabling ultra low latency (ULL) traffic to gain fast channel access. These latency reduction techniques further include updating a size of a contention window for channel access. In addition, these latency reduction techniques include enhancing CPDCCH-based signaling to accommodate the ULL frame structure. Further, these latency reduction techniques include providing robust operation against bursty interference for ULL transmissions. Moreover, these techniques include managing DRX for ULL. Additionally, these latency reduction techniques include joint scheduling of different TTI durations. These latency reduction techniques further include updating SRS transmission opportunities. In addition, these latency reduction techniques include reducing latency associated with PRACH transmissions. Further, these latency reduction techniques include reducing ULL transmission delays by either ignoring or cancelling scheduled uplink (e.g., LTE) transmissions.

公开(公告)号：US20190149278A1

公开(公告)日：2019-05-16

申请号：US16244718

申请日：2019-01-10

Applicant: QUALCOMM Incorporated

Inventor： Wanshi CHEN ,  Peter GAAL ,  Tao LUO ,  Aleksandar DAMNJANOVIC ,  Yongbin WEI ,  Durga Prasad MALLADI ,  Hao XU ,  Srinivas YERRAMALLI

IPC: H04L1/18 ,  H04W72/14

Abstract: Systems and methods for uplink transmission scheduling are disclosed. A wireless device may monitor at least two downlink sub-frames for scheduling grants. The wireless device may receive a first uplink scheduling grant in one of the at least two downlink sub-frames for at least a first uplink sub-frame and receive a second uplink scheduling grant in another of the at least two downlink sub-frames for at least the first uplink sub-frame. The wireless device may perform an uplink transmission in the first uplink sub-frame based on one or both of the first uplink scheduling grant and the second uplink scheduling grant. For the uplink transmission, the wireless device may select a most recent uplink scheduling grant or select an uplink scheduling grant received in a downlink sub-frame at least a minimum number of sub-frames before the first uplink sub-frame.

公开(公告)号：US20190116585A1

公开(公告)日：2019-04-18

申请号：US16157869

申请日：2018-10-11

Applicant: QUALCOMM Incorporated

Inventor： Kaushik CHAKRABORTY ,  Rahul MALIK ,  Srinivas YERRAMALLI ,  Tamer KADOUS

IPC: H04W72/04 ,  H04L5/00 ,  H04W76/15 ,  H04W24/10

CPC classification number: H04W72/042 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/0098 ,  H04W24/10 ,  H04W36/0069 ,  H04W52/02 ,  H04W52/0235 ,  H04W76/15

Abstract: Aspects of the present disclosure provide various procedures and methods for accelerated secondary cell (SCell) activation when carrier aggregation (CA) is configured. A scheduling entity receives, from a network entity, an indication of anticipated data for a user equipment (UE) in an idle mode. The scheduling entity determines supplemental wake-up information based on the carrier aggregation capability of the PCell. The scheduling entity transmits a wake-up message to the UE. The wake up message is configured to cause the UE to wake up in a CA configuration using the PCell and one or more SCells, based on the supplemental wakeup information.

公开(公告)号：US20190098628A1

公开(公告)日：2019-03-28

申请号：US16203500

申请日：2018-11-28

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Wanshi CHEN ,  Peter GAAL ,  Xiaoxia ZHANG

IPC: H04W72/04 ,  H04L5/00 ,  H04L1/18 ,  H04W16/14 ,  H04W72/02

Abstract: In enhanced licensed assisted access (eLAA), providing several approaches to report the CSI measurement may be desirable to provide flexibility in CSI reporting, especially in aperiodic CSI reporting. Further, a difference in using a licensed carrier and an unlicensed carrier may be considered during communication. In addition, assigning different transmit power usage based on different transmission types may be desired. The apparatus may be a user equipment (UE). The apparatus may be a UE. The UE receives a grant for uplink communication. The UE determines a reporting subframe based on the grant. The UE determines whether to select, as a reference subframe, a triggering subframe in which the grant is received or a subframe before the reporting subframe. The UE transmits, in the reporting subframe, channel state information (CSI) measured in the reference subframe.

公开(公告)号：US20190075597A1

公开(公告)日：2019-03-07

申请号：US16108862

申请日：2018-08-22

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Tamer KADOUS

IPC: H04W74/08 ,  H04W72/04 ,  H04W36/04 ,  H04J11/00 ,  H04W8/22 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described. A base station may configure a system frame number (SFN) and hyper-SFN associated with a long term sensing pattern. The base station may then transmit the SFN and hyper-SFN to indicate a sensing period corresponding to the long term sensing pattern. A UE may receive a SFN and hyper-SFN associated with a long term sensing pattern. The UE may determine, based on the SFN and hyper-SFN, a sensing period corresponding to the long term sensing pattern. The UE may then suspend a plurality of procedures during the sensing period.

公开(公告)号：US20190007946A1

公开(公告)日：2019-01-03

申请号：US15980568

申请日：2018-05-15

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Tamer KADOUS ,  Chih-Hao LIU ,  Mostafa KHOSHNEVISAN

IPC: H04W72/04 ,  H04W76/27 ,  H04W68/02 ,  H04W16/14 ,  H04W16/32

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：US20180316454A1

公开(公告)日：2018-11-01

申请号：US15942088

申请日：2018-03-30

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar DAMNJANOVIC ,  Tao LUO ,  Andrei RADULESCU ,  Srinivas YERRAMALLI ,  Rahul MALIK

IPC: H04J11/00 ,  H04W48/10 ,  H04L5/00

Abstract: Various aspects described herein relate to techniques for synchronization signal transmissions in wireless communications (e.g., 5th Generation New Radio). In an aspect, a method includes detecting that a medium in a shared spectrum is busy, and delaying a transmission of a synchronization signal (SS) block in the shared spectrum in response to detecting that the medium is busy. The method further includes detecting that the previously busy medium is free, and transmitting, in response to detecting that the medium is free, a filler signal before transmitting the SS block in the shared spectrum, and the SS block includes one or more discovery reference signals (DRSs).

公开(公告)号：US20180270819A1

公开(公告)日：2018-09-20

申请号：US15986769

申请日：2018-05-22

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Wanshi CHEN ,  Peter GAAL ,  Xiaoxia ZHANG

IPC: H04W72/04 ,  H04W16/14 ,  H04L5/00 ,  H04L1/18

Abstract: In enhanced licensed assisted access (eLAA), providing several approaches to report the CSI measurement may be desirable to provide flexibility in CSI reporting, especially in aperiodic CSI reporting. Further, a difference in using a licensed carrier and an unlicensed carrier may be considered during communication. In addition, assigning different transmit power usage based on different transmission types may be desired. The apparatus may be a user equipment (UE). The apparatus may be a UE. The UE receives a grant for uplink communication. The UE determines a reporting subframe based on the grant. The UE determines whether to select, as a reference subframe, a triggering subframe in which the grant is received or a subframe before the reporting subframe. The UE transmits, in the reporting subframe, channel state information (CSI) measured in the reference subframe.