公开(公告)号：US20200336921A1

公开(公告)日：2020-10-22

申请号：US16850205

申请日：2020-04-16

Applicant: QUALCOMM Incorporated

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

IPC: H04W16/28 ,  H04W72/04 ,  H04W74/08 ,  H04W16/14

Abstract: For unlicensed high-frequency bands such as mmW bands as used in 5G NR communications, either by regulation or for coexistence with licensed frequency bands, there may be a need for a contention-based access procedure such as the LBT procedure. A challenge is to find a suitable sensing beam to functions as a proxy for a set of transmission beams. In an aspect of the disclosure, a method and an apparatus are provided. The apparatus is configured to determine a set of transmission beams for a transmission opportunity, determine a sensing beam for the set of transmission beams based on a set of beam sensing criteria; and initiate an LBT procedure by sensing an energy on the determined sensing beam. The apparatus may then use the LBT procedure to obtain the access to and transmit data on the determined set of transmission beams.

公开(公告)号：US20190261354A1

公开(公告)日：2019-08-22

申请号：US16282009

申请日：2019-02-21

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar FAKOORIAN ,  Srinivas YERRAMALLI ,  Xiaoxia ZHANG ,  Jing SUN ,  Tamer KADOUS

IPC: H04W72/04 ,  H04L1/08 ,  H04L1/18

Abstract: Techniques and apparatus for enhancing uplink grant-free transmissions and/or downlink semi-persistent scheduling (SPS) transmissions for uplink ultra-reliable low latency communications (URLLC) are described. One technique includes receiving a first configuration for a first grant-free communication and a second configuration for at least one second grant-free communication. Grant-free communications are performed based on at least one of the first configuration or the second configuration.

公开(公告)号：US20190059102A1

公开(公告)日：2019-02-21

申请号：US16103434

申请日：2018-08-14

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04L5/00 ,  H04L1/18 ,  H04W72/04 ,  H04L5/14 ,  H04W4/70 ,  H04W76/27

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for receiving ACK/NACK reporting in unlicensed IoT systems with long transmission durations. In one example, an eNodeB executes an LBT protocol to gain access to a channel of a shared spectrum, receives radio resource management (RRM) measurement reports from an IoT-U, estimates a number of repetitions used to schedule the IoT-U based on the RRM measurement, and configures the maximum number of HARQ processes that can be scheduled in a frame based on the RRM measurements and the estimate of the repetitions.

公开(公告)号：US20180332430A1

公开(公告)日：2018-11-15

申请号：US15591994

申请日：2017-05-10

Applicant: QUALCOMM Incorporated

Inventor： Akash KUMAR ,  Amit JAIN ,  Sai Pradeep VENKATRAMAN ,  Srinivas YERRAMALLI

IPC: H04W4/02 ,  H04B17/318

CPC classification number: H04W4/02 ,  G01S5/0263 ,  H04B17/318

Abstract: A mobile device can send and receive signals in a dedicated frequency band and receive signals in a separate frequency band separate from the dedicated frequency band. The mobile device can send one or more frequency band compatibility combinations each including first and second frequency bands, the first frequency band being in the separate frequency band and the second frequency band being in the dedicated frequency. The mobile device can listen, based on a received neighbor list, for a first signal that has a frequency in the first frequency band and for a second signal that has a frequency in the second frequency band. The mobile device can determine, based on the first signal, ranging information indicative of a range from the mobile device to a source of the first signal, e.g., to obtain improved accuracy ranging information.

公开(公告)号：US20180310341A1

公开(公告)日：2018-10-25

申请号：US15811125

申请日：2017-11-13

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04B1/7156 ,  H04W74/00

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. In one configuration, the apparatus may receive, from a base station, first information associated with one or more resources allocated for at least one PRACH transmission. In one aspect, the one or more resources may be allocated in an unlicensed spectrum. In another aspect, the one or more resources may be allocated based on a multi-tone PRACH bandwidth. The apparatus may also receive second information associated with a frequency hopping configuration from the base station. In one aspect, the frequency hopping configuration may be associated with at least one of the one or more allocated resources or the multi-tone PRACH bandwidth. The apparatus may transmit, to the base station, the at least one PRACH transmission using the one or more allocated resources within the multi-tone PRACH bandwidth and the frequency hopping configuration.

公开(公告)号：US20180124777A1

公开(公告)日：2018-05-03

申请号：US15635033

申请日：2017-06-27

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Tamer KADOUS ,  Chih-Hao LIU ,  Chirag PATEL ,  Alberto RICO ALVARINO

IPC: H04W72/04

CPC classification number: H04W72/0453 ,  H04B1/713 ,  H04L1/12 ,  H04L1/189 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/14 ,  H04L67/12 ,  H04W4/70 ,  H04W16/14 ,  H04W28/26 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/048 ,  H04W74/0808 ,  H04W88/02 ,  H04W88/08

Abstract: A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A UE apparatus transmits uplink transmissions in a plurality of transmission units and hops frequency bands in a first pattern across frames based on a base station hopping pattern. The apparatus may transmit uplink transmissions based on dual hopping patterns, and may hop in a second pattern across transmission units within the base station's channel occupancy within a frame. A base station apparatus may hop frequency bands in a first pattern across frames based on a base station hopping pattern, and may receive uplink transmissions in a narrowband from a UE in a plurality of transmission units within the frequency bands based on the base station hopping pattern.

公开(公告)号：US20170280445A1

公开(公告)日：2017-09-28

申请号：US15400285

申请日：2017-01-06

Applicant: QUALCOMM Incorporated

Inventor： Libin JIANG ,  Shailesh PATIL ,  Peter GAAL ,  Srinivas YERRAMALLI

IPC: H04W72/04 ,  H04L12/807 ,  H04W40/24

CPC classification number: H04W72/0446 ,  H04L47/27 ,  H04W40/244 ,  H04W74/0808 ,  H04W74/0816

Abstract: Improvement in co-existence of the LTE device-to-device communication with another device-to-device communication method is desired. The apparatus selects a countdown number within a size of a contention window including a plurality of slots before a target subframe. The apparatus determines whether each slot of the plurality of slots is idle or utilized while waiting for the target subframe. The apparatus counts down the countdown number during each of the determined idle slots. The apparatus determines whether the countdown number has reached a threshold number before the target subframe. The apparatus performs, when the countdown number is determined to have reached the threshold number, one of: deferring from transmitting until the target subframe, or transmitting a CUBS until a next subframe or the target subframe.

公开(公告)号：US20170230943A1

公开(公告)日：2017-08-10

申请号：US15423232

申请日：2017-02-02

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Peter GAAL ,  Tao LUO ,  Xiaoxia ZHANG ,  Juan MONTOJO ,  Aleksandar DAMNJANOVIC ,  Marco PAPALEO

IPC: H04W72/04 ,  H04L1/18 ,  H04W74/08 ,  H04L5/00

CPC classification number: H04W72/042 ,  H04L1/1861 ,  H04L5/001 ,  H04L5/0048 ,  H04L27/0006 ,  H04W72/0453 ,  H04W74/0816 ,  H04W84/12

Abstract: Apparatus and methods for long term evolution (LTE) licensed-assisted access (LAA) communications at a user equipment (UE) are described herein. In an aspect, an example method includes a user equipment (UE) receiving a radio resource control (RRC) message from an eNB and searching for a discovery reference signal (DRS) associated with a secondary cell (Scell) of the eNB based at least on the information received in the RRC message. The example method further includes transmitting on the channel detected during the search.

公开(公告)号：US20170034805A1

公开(公告)日：2017-02-02

申请号：US15222731

申请日：2016-07-28

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia ZHANG ,  Srinivas YERRAMALLI ,  Tao LUO

IPC: H04W72/00 ,  H04W16/14 ,  H04W74/08 ,  H04W4/06 ,  H04L5/00

CPC classification number: H04W72/005 ,  H04L5/0035 ,  H04W4/06 ,  H04W16/14 ,  H04W48/08 ,  H04W74/002 ,  H04W74/08 ,  H04W84/042

Abstract: A method and apparatus for identifying joint transmissions in unlicensed spectrum are described, including receiving, at a user equipment (UE), a frame from one or more network entities over a contention-based medium, wherein the frame includes a preamble. The method and apparatus further include determining whether the frame corresponds to a unicast transmission or a joint transmission based on the preamble. In another aspect, a method and apparatus include determining, at a network entity, whether a frame corresponds to a unicast transmission or a joint transmission. The method and apparatus include transmitting the frame with a preamble to a UE over a contention-based medium, the preamble being based on determining whether the frame corresponds to the unicast transmission or the joint transmission. For example, the type of scrambling applied to the preamble may be based on whether the frame corresponds to unicast transmission or joint transmission.

Abstract translation: 描述了用于识别非许可频谱中的联合传输的方法和装置，包括在用户设备（UE）处，通过基于竞争的媒体从一个或多个网络实体接收帧，其中所述帧包括前导码。 所述方法和装置还包括基于所述前导码来确定所述帧是对应于单播传输还是联合传输。 在另一方面，一种方法和装置包括在网络实体处确定帧是否对应于单播传输或联合传输。 所述方法和装置包括：通过基于竞争的媒体向UE发送具有前导码的帧，所述前导码基于确定所述帧是否对应于所述单播传输或所述联合传输。 例如，应用于前导码的加扰类型可以是基于帧对应于单播传输还是联合传输。

公开(公告)号：US20160309354A1

公开(公告)日：2016-10-20

申请号：US15098128

申请日：2016-04-13

Applicant: QUALCOMM Incorporated

Inventor： Srinivas YERRAMALLI ,  Tao LUO ,  Aleksandar DAMNJANOVIC

IPC: H04W24/08 ,  H04W76/04 ,  H04W72/14 ,  H04W72/08 ,  H04W72/04

CPC classification number: H04W24/08 ,  H04W16/14 ,  H04W24/02 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/0473 ,  H04W72/085 ,  H04W72/14 ,  H04W74/006 ,  H04W74/0808 ,  H04W76/27 ,  H04W84/12 ,  H04W88/02

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. An eNB determines a CCA parameter for use by a UE in performing a CCA procedure for UL transmission and transmits an indication of the CCA parameter to the UE. The UE receives an indication of the CCA parameter for UL transmission from the eNB and performs the CCA procedure for UL transmission using the indicated CCA parameter. The UE may transmit to the eNB prior to receiving the indication of the CCA parameter. The eNB may use the report in determining the CCA parameter for use by the UE.

Abstract translation: 提供了一种用于无线通信的方法，装置和计算机程序产品。 eNB确定CCA参数以供UE在执行用于UL传输的CCA过程中使用，并向UE发送CCA参数的指示。 UE从eNB接收用于UL传输的CCA参数的指示，并使用所指示的CCA参数执行用于UL传输的CCA过程。 UE可以在接收到CCA参数的指示之前向eNB发送。 eNB可以在确定CCA参数以使用UE时使用该报告。