公开(公告)号：US20220377739A1

公开(公告)日：2022-11-24

申请号：US17837871

申请日：2022-06-10

Applicant: QUALCOMM Incorporated

Inventor： Kaushik CHAKRABORTY ,  Xiaoxia ZHANG ,  Jing SUN ,  Tamer KADOUS

IPC: H04W72/04

Abstract: Wireless communications systems and methods related to communications in a network that supports data transmitted in an unlicensed frequency band and a licensed frequency band are provided. A first wireless communication device communicates, with a second wireless communication device, a configuration indicating a first resource in an unlicensed frequency band and a second resource in a licensed band. The first wireless communication device communicates, with the second wireless communication device in the unlicensed frequency band, a first communication signal based on the configuration. The first wireless communication device communicates with the second wireless communication device in the licensed frequency band, a second communication signal based on at least one of a channel status of the unlicensed frequency band or a transmission parameter associated with at least one of the first communication signal or the second communication signal.

公开(公告)号：US20220279574A1

公开(公告)日：2022-09-01

申请号：US17663823

申请日：2022-05-17

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia ZHANG ,  Tamer KADOUS ,  Kapil BHATTAD ,  Jing SUN

IPC: H04W74/08 ,  H04W72/04

Abstract: Wireless communications systems and methods related to communicating in a frequency band based on bandwidth parts are provided. A first wireless communication device communicates with a second wireless communication device, a first configuration indicating a plurality of bandwidth parts in a frequency band, the plurality of bandwidth parts based on an expected channel access pattern associated with a listen-before-talk (LBT) in the frequency band. The first wireless communication device communicates, with the second wireless communication device, a first communication signal in a first bandwidth part of the plurality of bandwidth parts based on an LBT result.

公开(公告)号：US20200213888A1

公开(公告)日：2020-07-02

申请号：US16716082

申请日：2019-12-16

Applicant: QUALCOMM Incorporated

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

IPC: H04W24/10 ,  H04W72/04 ,  H04W4/70 ,  H04L5/00 ,  H04W16/14

Abstract: Various features related to eMTC-U deployment are described. In an aspect of the disclosure, an apparatus (e.g., a base station) maybe configured to select a subset of non-anchor channels from a set of available non-anchor channels, where the subset of non-anchor channels may correspond to a bandwidth within an unlicensed band. The apparatus maybe further configured to transmit information indicating the subset of non-anchor channels via an anchor channel. In some configurations, the subset of non-anchor channels maybe selected based on channel measurements performed by the base station or a UE. In one aspect, a UE may receive, from a base station via an anchor channel, information indicating a subset of non-anchor channels selected from a set of available non-anchor channels. The UE may transmit data on one or more non-anchor channel of the subset of non-anchor channels.

公开(公告)号：US20190373640A1

公开(公告)日：2019-12-05

申请号：US15997533

申请日：2018-06-04

Applicant: QUALCOMM Incorporated

Inventor： Jing SUN ,  Tao LUO ,  Tamer KADOUS

IPC: H04W74/08 ,  H04L5/00 ,  H04W16/14

Abstract: Certain aspects of the present disclosure provide techniques for beam refinement reference signal (BRRS) design for millimeter wave (mmWave) system in shared spectrum. The techniques can include a method for wireless communication that includes transmitting at least one of a request-to-send (RTS) or a clear-to-send (CTS) within a frame using frequency resources in a shared spectrum, and including a beam refinement reference signal (BRRS) in the at least one of the RTS or CTS.

公开(公告)号：US20190342045A1

公开(公告)日：2019-11-07

申请号：US16400822

申请日：2019-05-01

Applicant: QUALCOMM Incorporated

Inventor： Andrei Dragos RADULESCU ,  Srinivas YERRAMALLI ,  Xiaoxia ZHANG ,  Aleksandar DAMNJANOVIC ,  Tamer KADOUS ,  Jing SUN ,  Yongbin WEI

IPC: H04L5/00 ,  H04W72/12 ,  H04W72/04

Abstract: Scheduling around frame based equipment (FBE) idle periods reduces the flexibility of scheduling and partitioning. This leads to a latency caused by waiting for the next downlink scheduling opportunity and skipping over unused uplink scheduling slots. According to certain aspects, to reduce overhead caused by idle time and ensure full downlink scheduling, a base station (BS) alternates between idle periods and channel occupancy time every fixed frame period with one or more other synchronized BSs, between components carriers of the BS, or both. Thus, a BS can always schedule downlink on a carrier during an idle period scheduled for a different BS and/or a different carrier.

公开(公告)号：US20190327047A1

公开(公告)日：2019-10-24

申请号：US16385929

申请日：2019-04-16

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04W56/00

Abstract: A method and a system for narrowband wireless communication is disclosed. The base station constructs a DRS comprising a first set of contiguous NPSS subframes followed by a second set of contiguous repeating NSSS subframes. The DRS may further comprise a third set of NSSS subframes followed by a fourth set of NPSS subframes. The base station may apply a cover code to symbols of the NPSS subframes. The base station transmits the NPSS/NSSS subframes as part of a DRS subframe on an anchor channel.

公开(公告)号：US20190181995A1

公开(公告)日：2019-06-13

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

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：US20190132817A1

公开(公告)日：2019-05-02

申请号：US16167417

申请日：2018-10-22

Applicant: QUALCOMM Incorporated

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

IPC: H04W68/02 ,  H04W76/28 ,  H04W74/08 ,  H04B1/713 ,  H04W16/14 ,  H04W48/16 ,  H04L5/00

Abstract: A DRX/eDRX cycle may include a single PFW located in one of the non-anchor hopping frames and used to transmit a paging message. When the LBT procedure fails for the non-anchor hopping frame in which the PFW is located, transmission of the paging message may be delayed. Postponing the transmission of the paging message until a subsequent DRX/eDRX cycle be detrimental since the UE may not receive the change in system information at the next modification boundary. Thus, there is a need for paging mechanism the increases the chance of a UE receiving a paging message during a DRX/eDRX cycle. The present disclosure provides a paging mechanism that uses a PSFW with a PFW in each non-anchor hopping frame within a DRX/eDRX cycle. Hence, the chance of a UE receiving a paging message and hence the change in system information may be increased.

公开(公告)号：US20190090256A1

公开(公告)日：2019-03-21

申请号：US16134534

申请日：2018-09-18

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/12 ,  H04W74/08

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：US20190037427A1

公开(公告)日：2019-01-31

申请号：US16046868

申请日：2018-07-26

Applicant: QUALCOMM Incorporated

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

IPC: H04W24/10 ,  H04W72/04 ,  H04B1/713

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a configuration for cell measurement associated with a frequency hopping system. The base station may then receive a measurement report based on the configuration. A UE may receive a configuration for cell measurement associated with a frequency hopping system. The UE may generate a measurement report based on the configuration. The UE may then transmit the measurement report to a serving base station.