公开(公告)号：US20210143883A1

公开(公告)日：2021-05-13

申请号：US17070758

申请日：2020-10-14

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Xiaoxia ZHANG ,  Arumugam CHENDAMARAI KANNAN

IPC: H04B7/06 ,  H04B17/345 ,  H04B17/391 ,  H04L1/00

Abstract: Certain aspects of the present disclosure provide techniques for enhancements to channel state information (CSI) reporting. A method that may be performed by a user equipment (UE) includes obtaining, from a network entity, a CSI reporting configuration for reporting CSI for a channel. The method further includes generating a model of an interference pattern for the channel, and predicting one or more candidate interference levels for one or more upcoming slots using the model. The method further includes reporting information regarding the candidate interference levels to the network entity.

公开(公告)号：US20210135815A1

公开(公告)日：2021-05-06

申请号：US17089562

申请日：2020-11-04

Applicant: QUALCOMM Incorporated

Inventor： Akula REDDY ,  Jing SUN ,  Srinivas YERRAMALLI ,  Tao LUO ,  Xiaoxia ZHANG ,  Ahmed Abdelaziz Ibrahim Ab ZEWAIL ,  Wooseok NAM ,  Sungwoo PARK

IPC: H04L5/00 ,  H04L27/26

Abstract: In an aspect, the present disclosure includes a method, apparatus, and computer readable medium for wireless communications for generating, by a network entity for a user equipment (UE), a synchronization signal block (SSB) and an additional resource signal (RS) based on a variable function of a SSB subcarrier spacing (SCS) for communication after initial acquisition; and transmitting, by the network entity to the UE, the SSB including the additional RS.

公开(公告)号：US20210092723A1

公开(公告)日：2021-03-25

申请号：US17029469

申请日：2020-09-23

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Arumugam CHENDAMARAI KANNAN ,  Xiaoxia ZHANG ,  Vinay CHANDE ,  Tao LUO

IPC: H04W72/04 ,  H04L5/00

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for selecting a beam to be allocated for transmitting downlink (DL) data to user equipment (UE). In some implementations, a UE receives a reference signal on each of a number of beams associated with a base station, and determines a delay spread value for each beam. The UE identifies each beam for which the determined channel delay spread value is less than a threshold value, and determines a reference signal received power (RSRP) level for each identified beam. The UE transmits an indication of the determined RSRP levels of the identified beams to the base station, and receives, in response to the transmitted indication, a selection of the beam to be allocated for DL transmissions to the UE.

公开(公告)号：US20200344775A1

公开(公告)日：2020-10-29

申请号：US16870782

申请日：2020-05-08

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/12 ,  H04L5/00

Abstract: In an embodiment, an AP executes a CCA protocol to determine whether to begin transmission within a DMTC window of a radio frame having first and second blocks of subframes. The AP transmits a multi-subframe DRS within the DRS subframes that is scrambled in accordance with a CSI-RS scrambling rule that determines how the second DRS subframe is to be scrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes. At least one UE monitors the DMTC window, and descrambles the CSI-RSs in the multi-DRS subframe based on a CSI-RS descrambling rule that determines how the second DRS subframe is to be descrambled based on whether the first DRS subframe is included among the first block of subframes or the second block of subframes.

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.