公开(公告)号：US20220091221A1

公开(公告)日：2022-03-24

申请号：US17469768

申请日：2021-09-08

Applicant: QUALCOMM Incorporated

Inventor： Alexandros MANOLAKOS ,  Mukesh Kumar ,  Srinivas Yerramalli

IPC: G01S5/02 ,  H04W64/00 ,  H04W4/029

Abstract: A user equipment (UE) reports its own position using reference location information messages and relative location information messages. An example method performed by a first UE includes determining a first location of the first UE based on positioning measurements, transmitting a reference location information message indicating the first location, determining one or more subsequent locations of the first UE based on subsequent positioning measurements, and transmitting one or more relative location information messages, each of the one or more relative location information messages indicating a subsequent location for the UE based on relative information with respect to the first location.

公开(公告)号：US11240688B2

公开(公告)日：2022-02-01

申请号：US16893270

申请日：2020-06-04

Applicant: QUALCOMM Incorporated

Inventor： Sungwoo Park ,  Arumugam Chendamarai Kannan ,  Tao Luo ,  Xiaoxia Zhang ,  Jing Sun ,  Srinivas Yerramalli ,  Vinay Chande ,  Olufunmilola Omolade Awoniyi-Oteri ,  Sony Akkarakaran ,  Mostafa Khoshnevisan ,  Zhifei Fan ,  Kaushik Chakraborty

IPC: H04W24/02 ,  H04W72/12 ,  H04B17/336

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, transmissions from a neighboring base station may interfere with downlink transmissions from a serving base station to a target user equipment (UE). To coordinate interference between the base stations (e.g., mitigate interference, stabilize interference, etc.), the serving base station may generate an interference coordination message and may transmit the message over-the-air (OTA) to one or more neighboring base stations. The message may include parameters indicating a coordination scheme for the neighboring base station(s) to use for modifying one or more scheduling decisions. The coordination scheme may be configured or dynamically selected and may include interfering beam fixation, interfering beam suppression, or interfering beam avoidance. A neighboring base station receiving the OTA interference coordination message may modify a scheduling decision to mitigate or stabilize interference when the serving base station is transmitting to the target UE.

公开(公告)号：US11224060B2

公开(公告)日：2022-01-11

申请号：US16654435

申请日：2019-10-16

Applicant: QUALCOMM Incorporated

Inventor： Yan Zhou ,  Tao Luo ,  Makesh Pravin John Wilson ,  Arumugam Chendamarai Kannan ,  Xiaoxia Zhang ,  Jing Sun ,  Srinivas Yerramalli

IPC: H04W72/12 ,  H04W16/14

Abstract: A method, a computer-readable medium, and an apparatus are provided that improves the reliability of communication between a base station and a user equipment (UE) using an unlicensed spectrum. A base station transmits an initial signal (IS) to the UE indicating communication to the UE within a Channel Occupancy Time (COT), and transmits a gap transmission during the COT over a time period following the IS and prior to transmitting the communication to the UE.

公开(公告)号：US11212796B2

公开(公告)日：2021-12-28

申请号：US16796305

申请日：2020-02-20

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Peter Gaal ,  Juan Montojo ,  Tao Luo ,  Wanshi Chen

IPC: H04W72/04 ,  H04L1/00 ,  H04L1/18 ,  H04W68/00 ,  H04W74/00 ,  H04L5/00 ,  H04W28/02 ,  H04W72/12 ,  H04W72/14 ,  H04W16/14 ,  H04W52/02 ,  H04W52/14 ,  H04W52/36 ,  H04W56/00 ,  H04W74/08

Abstract: Techniques are described for wireless communication. One method includes detecting a first reference signal received from a user equipment (UE) in a reference scheduled transmission burst including a plurality of contiguous transmission time intervals (TTIs) received over a shared radio frequency spectrum band; identifying a reference TTI in which the first reference signal is received; determining a contention window size usable by the UE to contend for access to the shared radio frequency spectrum band; and transmitting an indication of the determined contention window size to the UE.

公开(公告)号：US11206605B2

公开(公告)日：2021-12-21

申请号：US16109241

申请日：2018-08-22

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Srinivas Yerramalli

IPC: H04W72/04 ,  H04W48/16 ,  H04L5/00 ,  H04W24/10 ,  H04L5/14 ,  H04B7/06 ,  H04L27/00 ,  H04W24/02

Abstract: Methods, systems, and devices for wireless communication are described. Some wireless communications systems may support multi-band operation. Different frequency bands may experience different communication characteristics (e.g., frequency-dependent fading), which may result in undesirable interference patterns and/or coverage gaps. The described techniques provide for discovery procedures for multi-band operation. The discovery procedures may allow for improved throughput, improved energy efficiency, reduced signaling overhead, as well as other benefits for a wireless communications system. Generally, the described techniques provide for efficient discovery reference signal (DRS) transmissions over multiple frequency bands. The timing of the DRS transmissions across the different bands may be related or the DRS transmission timing for each band may be determined independently.

公开(公告)号：US20210377968A1

公开(公告)日：2021-12-02

申请号：US17394242

申请日：2021-08-04

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Tamer Kadous ,  Srinivas Yerramalli ,  Tao Luo

IPC: H04W72/12 ,  H04L5/00 ,  H04W72/14

Abstract: Methods, systems, and devices for wireless communications are described. In a wireless communications system, multiple transmission/reception points (TRPs) may perform a joint transmission to a user equipment (UE) such that the UE may rely on demodulation reference signals (DMRSs) from the TRPs for channel estimation and data demodulation to receive the joint transmission. When TRP transmissions are punctured, which may introduce reception errors at a receiving UE, one or more TRPs may transmit unique DMRSs such that each TRP transmits a DMRS that is unique to the transmitting TRP, transmit DMRSs that are unique to punctured resource elements (REs), or determine to refrain from transmitting on punctured REs. In some cases, TRPs may transmit preemption indications (PIs) to a UE, where the PIs may indicate punctured (e.g., or not utilized) REs to allow the UE to utilize a unique DMRS for channel estimation or to ignore the punctured

公开(公告)号：US11190234B2

公开(公告)日：2021-11-30

申请号：US16385943

申请日：2019-04-16

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Srinivas Yerramalli ,  Xiaoxia Zhang ,  Tamer Kadous ,  Yongbin Wei ,  Jing Sun ,  Andrei Dragos Radulescu

IPC: H04B1/7136 ,  H04B1/7143 ,  H04B1/7156 ,  H04L27/26

Abstract: Techniques providing opportunistic frequency switching for frame based equipment (FBE), such as may be configured to minimize opportunistic frequency switching delay in FBE new radio (NR) unlicensed (NR-U) networks and/or to provide frequency diversity FBE access based on offset sequences of medium sensing occasions for the carrier frequencies are disclosed. Within the FBE mode network, a base station may configure a pattern of sensing locations in each frame for each frequency transmission unit of the plurality of frequency transmission units, wherein an inter-unit delay of sensing locations between a first frequency transmission unit and a next adjacent frequency transmission unit and between a last frequency transmission unit and the first frequency transmission unit is a fixed duration. Opportunistic frequency switching of embodiments may utilize the medium sensing locations for opportunistically switching between a sequence of the frequency transmission units for implementing frequency diversity FBE access.

公开(公告)号：US11184923B2

公开(公告)日：2021-11-23

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 ,  H04W76/28 ,  H04W16/14 ,  H04W28/02 ,  H04W72/02

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：US20210352631A1

公开(公告)日：2021-11-11

申请号：US16868330

申请日：2020-05-06

Applicant: QUALCOMM Incorporated

Inventor： Zhifei Fan ,  Jing Sun ,  Xiaoxia Zhang ,  Tao Luo ,  Srinivas Yerramalli ,  Wooseok Nam ,  Sungwoo Park ,  Arumugam Chendamarai Kannan

IPC: H04W72/04 ,  H04L1/00 ,  H04B7/06 ,  H04L5/00 ,  H04L25/02 ,  H04W76/11

Abstract: A base station transmits a first downlink control information (DCI) portion in a physical downlink control channel (PDCCH), wherein the first DCI portion indicates a second DCI portion. The base station jointly encodes multiple component DCIs, each of the component DCIs providing a resource allocation in combination with the first DCI portion. The apparatus transmits the second DCI portion comprising the jointly encoded multiple component DCIs in a physical downlink shared channel (PDSCH).

公开(公告)号：US20210337479A1

公开(公告)日：2021-10-28

申请号：US17368202

申请日：2021-07-06

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Rahul Malik ,  Tamer Kadous

IPC: H04W52/02 ,  H04W56/00 ,  H04L5/00 ,  H04W72/04 ,  H04L27/26 ,  H04L1/00

Abstract: Methods, systems, and devices for wireless communications are described that asynchronous carrier aggregation, including between high frequency band and lower frequency band transmissions. A user equipment (UE) may be configured to monitor transmissions in a first frequency band and a second frequency band. The UE may measure a timing difference between transmissions in the first frequency band and one or more of the transmissions in the second frequency band, and transmit an indication of the timing difference to a base station. The base station may use the timing difference to determine whether the UE is to use asynchronous carrier aggregation. If the base station determines that the UE is to use asynchronous carrier aggregation, the base station may configure the UE to observe at least a minimum amount of delay when conducting uplink signaling via one of the frequency bands.