公开(公告)号：US11510238B2

公开(公告)日：2022-11-22

申请号：US16831274

申请日：2020-03-26

Applicant: QUALCOMM Incorporated

Inventor： Xiao Feng Wang ,  Iyab Issam Sakhnini ,  Jun Ma ,  Huilin Xu ,  Dan Zhang

IPC: H04W74/00 ,  H04W74/08 ,  H04B7/185

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive information that indicates whether to perform a first random access channel (RACH) procedure for a non-terrestrial network or a second RACH procedure for a terrestrial network, wherein the first RACH procedure is configured to support a larger number of UEs contemporaneously performing a RACH procedure than the second RACH procedure. Responsive to the information indicating that the UE is to perform the first RACH procedure, the UE may perform the first RACH procedure. Numerous other aspects are provided.

公开(公告)号：US11483064B2

公开(公告)日：2022-10-25

申请号：US16831699

申请日：2020-03-26

Applicant: QUALCOMM Incorporated

Inventor： Xiao Feng Wang ,  Jun Ma ,  Iyab Issam Sakhnini ,  Dan Zhang

IPC: H04W4/00 ,  H04B7/185 ,  H04L27/26 ,  H04W74/08 ,  H04W72/12 ,  H04W84/06

Abstract: Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for efficiently determining appropriate uplink frequencies for uplink transmissions to a satellite. As described herein, a wireless communications system may support a closed loop frequency correction scheme where a satellite may provide an uplink frequency correction to a user equipment (UE) such that the UE may be able to identify an appropriate uplink frequency for an uplink transmission. In some implementations, the UE may first transmit an uplink signal to the satellite on an initial uplink frequency, and the satellite may determine a corrected uplink frequency for the UE based on the initial uplink frequency. The satellite may then transmit an indication of the corrected uplink frequency to the UE, and the UE may transmit a second uplink signal based on the corrected uplink frequency.

公开(公告)号：US20220322263A1

公开(公告)日：2022-10-06

申请号：US17220893

申请日：2021-04-01

Applicant: QUALCOMM Incorporated

Inventor： Ayan Sengupta ,  Le Liu ,  Alberto Rico Alvarino ,  Xiao Feng Wang ,  Mungal Singh Dhanda ,  Jun Ma ,  Peter Gaal ,  Bharat Shrestha ,  Liangping Ma ,  Umesh Phuyal

IPC: H04W56/00 ,  H04B7/185 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communications are described in which UEs may communicate with satellites or base stations, or both in a non-terrestrial network. Due to large distances between transmitting devices and receiving devices in a non-terrestrial network, the UE may account for propagation delay and frequency shift of communications with a satellite based on location information of the satellite. The UE may receive first satellite location information from a base station or a satellite, via a broadcast message. The UE may receive second satellite location information from the wireless network node via a unicast message, where both the first satellite location information and the second satellite location information relate to a same satellite. The UE may transmit an uplink communication via the satellite based on at least one of the first satellite location information or the second satellite location information.

公开(公告)号：US11456904B2

公开(公告)日：2022-09-27

申请号：US17214027

申请日：2021-03-26

Applicant: QUALCOMM Incorporated

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

IPC: H04L27/26

Abstract: Orthogonal frequency-division multiplexing (OFDM) numerologies that maintain symbol boundary alignment while distributing excess cyclic prefixes (CPs) among OFDM symbols. Communication is established using a first sub-carrier spacing (SCS) and a first OFDM numerology, such as an exemplary numerology that distributes excess CP duration among a set of symbols that occupy a time interval within or equal to a corresponding time interval of a symbol of a second OFDM numerology with a second lower SCS. The first SCS may be, e.g., 960 kHz. The second SCS may be, e.g., 120 kHz. Another exemplary OFDM numerology described herein distributes the excess CP as prefix and postfix portions to one of the symbols, such as the first symbol of a set. Communication then proceeds using the first OFDM numerology at the first SCS and, in illustrative examples, using the second OFDM numerology at the second SCS or other OFDM numerologies at other SCSs.

公开(公告)号：US20220182993A1

公开(公告)日：2022-06-09

申请号：US17115613

申请日：2020-12-08

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Jing Sun ,  Jun Ma ,  Zhifei Fan ,  Wooseok Nam ,  Iyab Issam Sakhnini ,  Tao Luo

IPC: H04W72/04 ,  H04L27/26

Abstract: Methods, systems, and devices for wireless communications are described. Devices in a wireless communications system may support different configurations to support intra-symbol multiplexing for communications between the devices using a single carrier waveform. For example, the different configurations may include symbol level cyclic prefixes, device-specific or channel-specific cyclic prefixes, device-specific or channel-specific guard intervals, or a combination thereof to support the intra-symbol multiplexing. That is, the cyclic prefixes or guard intervals may separate different fractions of a symbol, such that individual signals communicated in each of the different fractions do not leak into a subsequent fraction to cause interference. In some implementations, the cyclic prefixes or guard intervals may be enabled for a subset of devices or channels. A configuration for this intra-symbol multiplexing with device-specific or channel-specific cyclic prefixes or guard intervals may be signaled in a control message to the corresponding devices.

公开(公告)号：US20220132547A1

公开(公告)日：2022-04-28

申请号：US17451745

申请日：2021-10-21

Applicant: QUALCOMM Incorporated

Inventor： Liangping MA ,  Xiao Feng Wang ,  Alberto Rico Alvarino ,  Ayan Sengupta ,  Peter Gaal ,  Huilin Xu ,  Jun Ma ,  Bharat Shrestha ,  Umesh Phuyal

IPC: H04W72/12 ,  H04L1/16 ,  H04L5/00 ,  H04L1/18

Abstract: Certain aspects of the present disclosure are directed to techniques for hybrid automatic repeat request (HARQ) codebook design. For example, a user equipment (UE) configured for feedback processing may comprise a memory and a processor configured to receive, from a base station (BS), a first indication of a first feedback process type for providing feedback to the BS for a plurality of feedback processes of the UE. The memory and the processor may also be configured to receive one or more first downlink transmissions from the BS associated with at least one feedback process of the plurality of feedback processes. The memory and the processor may also be configured to transmit feedback or withhold transmission of feedback to the BS regarding decoding of the one or more first downlink transmissions according to the first feedback process type.

公开(公告)号：US20220038933A1

公开(公告)日：2022-02-03

申请号：US17346960

申请日：2021-06-14

Applicant: QUALCOMM Incorporated

Inventor： Liangping Ma ,  Xiao Feng Wang ,  Ayan Sengupta ,  Bharat Shrestha ,  Alberto Rico Alvarino ,  Umesh Phuyal ,  Jun Ma

IPC: H04W24/10 ,  H04L12/26 ,  H04L1/18 ,  H04L12/24

Abstract: Methods, systems, and devices for wireless communications are described. In some networks, a user equipment (UE) may perform radio link monitoring according to one or more radio link monitoring configurations. The UE may select a radio link monitoring configuration from a first radio link monitoring configuration associated with radio link monitoring over a duration that a hybrid automatic repeat request (HARQ) process is enabled and a second radio link monitoring configuration associated with radio link monitoring over a duration that the HARQ process is disabled. The UE may monitor reference signals using the selected radio link monitoring configuration, and may determine a radio link failure, a beam failure, or both has occurred based on monitoring the one or more reference signals using the selected radio link monitoring configuration. The UE may subsequently transmit a measurement report based on determining the radio link failure, the beam failure, or both.

公开(公告)号：US20210410118A1

公开(公告)日：2021-12-30

申请号：US16915399

申请日：2020-06-29

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04

Abstract: This disclosure provides systems, methods, and apparatuses, including computer programs encoded on computer storage media, for wireless communication. In one aspect of the disclosure, a method of wireless communication performed by a user equipment (UE) includes receiving, from a base station, a scheduling downlink control information (DCI) message in a physical downlink control channel (PDCCH). The scheduling DCI message indicates a resource allocation for a scheduled DCI message in a subsequent physical downlink shared channel (PDSCH). The method further includes receiving, from the base station, the scheduled DCI message within the subsequent PDSCH. Other aspects and features are also claimed and described.

公开(公告)号：US20210314889A1

公开(公告)日：2021-10-07

申请号：US17214538

申请日：2021-03-26

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Xiao Feng Wang ,  Liangping Ma ,  Ayan Sengupta ,  Jun Ma ,  Huilin Xu ,  Peter Gaal ,  Bharat Shrestha

IPC: H04W56/00 ,  H04W4/029 ,  H04W74/08

Abstract: Non-terrestrial networks (NTNs) may establish uplink (UL) and downlink (DL) radio frame timing structures to efficiently account for propagation delay and propagation delay variation associated with communications in the NTN. NTNs may manage (synchronize) radio frame timing structures of base stations (e.g., satellites) and user equipment (UEs) in the NTN. Further, UEs may determine timing advance (TA) values to be applied to UL transmissions based on their respective scheduling offset (e.g., offset in UL and DL radio frame timing structures), as well as based on propagation delay or round trip time (RTT). As such, served UEs may determine UL timing such that UL transmissions from the UEs to a satellite arrives at the satellite in a time synchronized manner. In other cases, a satellite may determine UL timing, based on reception timing, such that various UEs in the NTN may implement uniform UL and DL radio frame timing structures.

公开(公告)号：US20210051730A1

公开(公告)日：2021-02-18

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 ,  H04L5/00 ,  H04L27/00

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).