公开(公告)号：US11490426B2

公开(公告)日：2022-11-01

申请号：US16992678

申请日：2020-08-13

Applicant: QUALCOMM Incorporated

Inventor： Dan Zhang ,  Xiao Feng Wang ,  Peter Gaal ,  Jun Ma ,  Qiang Wu ,  Iyab Issam Sakhnini ,  Huilin Xu

IPC: H04W74/08 ,  H04L27/00 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate with a base station by initiating a random access procedure with a two-root preamble. The UE may receive, from the base station, control signaling that indicates a set of root preamble sequences. The UE may transmit, to the base station, a preamble signal that is generated based on a first root preamble sequence and a second root preamble sequence of the set of root preamble sequences. The UE may then monitor for a preamble response based on the preamble signal. In some cases, the base station may be a base station in a terrestrial network. In other cases, the base station may be a satellite in a non-terrestrial network (NTN).

公开(公告)号：US20210360629A1

公开(公告)日：2021-11-18

申请号：US17316576

申请日：2021-05-10

Applicant: QUALCOMM Incorporated

Inventor： Jun Ma ,  Tao Luo ,  Qiang Wu ,  Iyab Issam Sakhnini ,  Mehmet Izzet Gurelli ,  Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Xiaoxia Zhang ,  Jing Sun ,  Juan Montojo ,  Peter Gaal

IPC: H04W72/04

Abstract: Methods, systems, and devices for wireless communications are described. For example, a user equipment (UE) may transmit, to a base station, an indication of a capability of the UE to switch from monitoring a set of frequency resources according to a first subcarrier spacing (SCS) to monitoring the set of frequency resources according to a second SCS, less than the first SCS. The indication may indicate an amount of time for the UE to switch between SCSs. The UE may receive, from the base station, signaling that indicates a configuration for monitoring the set of frequency resources according to the second SCS (e.g., a configuration for a reduced SCS window). The UE may switch from monitoring the set of frequency resources according to the first SCS to monitoring the set of frequency resources according to the second SCS based on receiving the configuration for monitoring the set of frequency resources.

公开(公告)号：US20210352674A1

公开(公告)日：2021-11-11

申请号：US17313886

申请日：2021-05-06

Applicant: QUALCOMM Incorporated

Inventor： Mahmoud Taherzadeh Boroujeni ,  Tao Luo ,  Juan Montojo ,  Qiang Wu

IPC: H04W72/04 ,  H04B7/06 ,  H04L1/00

Abstract: Methods, systems, and devices for wireless communications are described. One method for coverage enhancement may include a base station transmitting control signaling to one or more user equipments (UEs) using a same beam configuration to perform a coverage enhancement procedure for uplink transmissions. In response, one or more UEs may determine one or more transmission parameters for uplink transmission based on the coverage enhancement procedure. In some cases, the coverage enhancement procedure may include the UEs transmitting additional repetitions of an uplink transmission, using additional time or frequency resources, or any combination thereof. In some cases, the UEs may use different coverage enhancement procedures. Accordingly, the one or more UEs may transmit an uplink transmission based on the one or more transmission parameters.

公开(公告)号：US20210352601A1

公开(公告)日：2021-11-11

申请号：US17308821

申请日：2021-05-05

Applicant: QUALCOMM Incorporated

Inventor： Iyab Issam Sakhnini ,  Tao Luo ,  Qiang Wu ,  Xiaoxia Zhang ,  Jing Sun ,  Sungwoo Park ,  Jun Ma ,  Mehmet Izzet Gurelli ,  Ahmed Abdelaziz Ibrahim Abdelaziz Zewail

IPC: H04W56/00 ,  H04J11/00 ,  H04W4/021 ,  H04L27/26

Abstract: Methods, systems, and devices for wireless communications are described. Generally, a user equipment (UE) may identify an energy per resource element (EPRE) ratio between a synchronization signal block (SSB) symbol containing a primary synchronization signal (PSS) and an SSB symbol containing a secondary synchronization signal (SSS), a physical broadcast channel (PBCH), or both, based on an operating band for the UE, a bandwidth of the SSB symbol containing the PSS and the SSB symbol containing the SSB, the PBCH, or both. The EPRE ratio may be based on maximum regulatory equivalent isotropically radiated power (EIRP) limits, maximum regulatory power spectral density (PSD) limits for the band, or both. The EPRE ratios may be different for different SSB symbols, when different SSB symbols have different bandwidths. A base station may configure and transmit, and a UE may receive, the SSB according to the identified EPRE ratio.

公开(公告)号：US20210345341A1

公开(公告)日：2021-11-04

申请号：US17241831

申请日：2021-04-27

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Qiang Wu ,  Jing Sun ,  Xiaoxia Zhang ,  Tao Luo ,  Iyab Issam Sakhnini ,  Jun Ma ,  Mehmet Izzet Gurelli ,  Juan Montojo ,  Peter Gaal

IPC: H04W72/04 ,  H04L1/16 ,  H04L1/00

Abstract: Methods, systems, and devices for wireless communications are described in which control resources may be identified, and a data transmission may be rate-matched around the one or more control channels of multiple UEs or at multiple aggregation levels in the control resources. A user equipment (UE) may identify a search space for a first control channel, and the rate-matching of the data transmission may be performed based on a location of the search space in the control resources. In some cases, a base station may provide a mapping of resources (e.g., a bitmap) within the control resources that are occupied, which may be used for rate-matching.

公开(公告)号：US10693574B2

公开(公告)日：2020-06-23

申请号：US15190601

申请日：2016-06-23

Applicant: QUALCOMM Incorporated

Inventor： Qiang Wu ,  Peter John Black ,  Jelena Damnjanovic

IPC: H04B17/364 ,  H04B7/204 ,  H04B7/185 ,  H04L5/14 ,  H04W24/08

Abstract: Methods and apparatus for efficient transmission of data by half-duplex transceivers in satellite communication systems are provided. Time reference for the return link is skewed or time-lagged relative to the time reference for the forward link to reduce the amount of guard time required to separate return link transmission from forward link reception by the half-duplex transceiver of a user terminal. The guard time is determined based on a maximum differential round-trip propagation delay and transition times of the half-duplexer transceiver to switch between transmit and receive modes. In a satellite communication system in which a large number of active user terminals are present in a beam coverage, random time offsets are applied to spread approximately equal traffic loads across the time offsets.

公开(公告)号：US10517116B2

公开(公告)日：2019-12-24

申请号：US15996999

申请日：2018-06-04

Applicant: QUALCOMM Incorporated

Inventor： Jelena Damnjanovic ,  Qiang Wu ,  Fatih Ulupinar

IPC: H04W74/08 ,  H04B7/185 ,  H04W72/12 ,  H04W28/02 ,  H04W88/16

Abstract: Methods and apparatuses are disclosed for a network controller to receive data from a user terminal (UT) via a satellite in a satellite system. The network controller may allocate contention-based resources of the satellite system to a plurality of UTs, and may activate the allocated contention-based resources by transmitting an activation signal to the plurality of UTs. The network controller may receive, from a first UT via a satellite of the satellite system, a first portion of data on a plurality of subframes of the contention-based resources during a time period, and may suspend the allocation of contention-based resources after an expiration of the time period or upon a grant of scheduled return link resources to the first UT, irrespective of collisions on the contention-based resources.

公开(公告)号：US20180376392A1

公开(公告)日：2018-12-27

申请号：US16012613

申请日：2018-06-19

Applicant: QUALCOMM Incorporated

Inventor： Qiang Wu ,  Peter John Black ,  Ruoheng Liu

IPC: H04W36/08 ,  H04J3/00

Abstract: A method and apparatus for operating a satellite system including different satellites that may belong to different types of satellite constellations. In some implementations, the satellite system may include a LEO satellite constellation and one or more non-LEO satellite constellations that can be used to increase the forward link capacity of the LEO satellite constellation, for example, by allowing an LEO satellite to offload at least some of its forward link traffic to one of the non-LEO satellites. The user terminals can dynamically switch forward link communications between a LEO satellite and a non-LEO satellite while maintaining a return link connection with the LEO satellite.

公开(公告)号：US20180288798A1

公开(公告)日：2018-10-04

申请号：US15996999

申请日：2018-06-04

Applicant: QUALCOMM Incorporated

Inventor： Jelena Damnjanovic ,  Qiang Wu ,  Fatih Ulupinar

IPC: H04W74/08 ,  H04W28/02 ,  H04W72/12 ,  H04B7/185 ,  H04W88/16

CPC classification number: H04W74/08 ,  H04B7/18517 ,  H04B7/18539 ,  H04W28/0278 ,  H04W72/1284 ,  H04W74/00 ,  H04W88/16

Abstract: Methods and apparatuses are disclosed for a network controller to receive data from a user terminal (UT) via a satellite in a satellite system. The network controller may allocate contention-based resources of the satellite system to a plurality of UTs, and may activate the allocated contention-based resources by transmitting an activation signal to the plurality of UTs. The network controller may receive, from a first UT via a satellite of the satellite system, a first portion of data on a plurality of subframes of the contention-based resources during a time period, and may suspend the allocation of contention-based resources after an expiration of the time period or upon a grant of scheduled return link resources to the first UT, irrespective of collisions on the contention-based resources.

公开(公告)号：US20180083694A1

公开(公告)日：2018-03-22

申请号：US15271750

申请日：2016-09-21

Applicant: QUALCOMM Incorporated

Inventor： Venkatraman Rajagopalan ,  Jelena Damnjanovic ,  Qiang Wu

IPC: H04B7/185 ,  H04L1/18

CPC classification number: H04B7/18513 ,  H04B7/18519 ,  H04B7/18541 ,  H04B7/195 ,  H04L1/1812 ,  H04L1/1816 ,  H04W56/005 ,  H04W56/0065

Abstract: A method and apparatus for operating a satellite access network (SAN) of a satellite communication system to schedule communications with a user terminal. In some aspects, the SAN may provision a communication frame, for the user terminal, into a number of forward-link (FL) subframes and a different number of reverse-link (RL) subframes. The SAN then transmits the FL subframes to the user terminal via a forward link of the satellite communication system, and subsequently receives the RL subframes from the user terminal via a reverse link of the satellite communication system.