公开(公告)号：US20190313260A1

公开(公告)日：2019-10-10

申请号：US16372917

申请日：2019-04-02

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Zhifei Fan ,  Jing Sun ,  Andrei Dragos Radulescu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W16/26

Abstract: Wireless communications systems and methods related to on-demand cell coverage extension for broadcast signals are provided. A first wireless communication device communicates, with a second wireless communication device, a first extended cell coverage request. The first wireless communication device communicates, with the second wireless communication device, a first broadcast communication signal in an extended cell coverage mode in response to the first extended cell coverage request. The first broadcast communication signal includes a system information block repeated in at least one of a time domain or a frequency domain.

公开(公告)号：US20190306881A1

公开(公告)日：2019-10-03

申请号：US16365505

申请日：2019-03-26

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Chih-Hao Liu ,  Tamer Kadous

IPC: H04W74/08 ,  H04L27/26 ,  H04L5/00 ,  H04W76/27

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform a transmission detection procedure on each base station before combining control information. The UE may use demodulation reference signals (DMRS) as a detection mechanism. If the UE detects a DMRS from a base station, the UE may determine that a control resource set associated with the base station is valid for combining. If the UE does not detect DMRS from the base station, the UE may refrain from combining control information from the base station. In another example, base stations that pass a listen-before-talk (LBT) pr6ocedure may transmit a preamble before transmitting control information. A preamble may carry a preamble sequence associated with a specific control resource set. The UE may identify a preamble sequence and determine that the corresponding control resource set is valid for control information combining.

公开(公告)号：US20190268907A1

公开(公告)日：2019-08-29

申请号：US16269992

申请日：2019-02-07

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Ananta Narayanan Thyagarajan ,  Xiaoxia Zhang ,  Jing Sun ,  Tamer Kadous

IPC: H04W72/04 ,  H04W52/36

Abstract: Wireless communications systems and methods related to scheduling and communicating in a frequency spectrum using interlaced frequency resources are provided. A first wireless communication device communicates, with a second wireless communication device, a first interlace configuration indicating a first set of interlaced frequency resources in a frequency band based on a power spectral density (PSD) parameter. The first wireless communication device communicates, with the second wireless communication device, a first frequency resource exclusion configuration. The first wireless communication device communicates, with the second wireless communication device, a first allocation including at least some frequency resources from the first set of interlaced frequency resources based on the first frequency resource exclusion configuration. The first wireless communication device communicates, with the second wireless communication device, a first communication signal based on the first allocation.

公开(公告)号：US20190246425A1

公开(公告)日：2019-08-08

申请号：US16268249

申请日：2019-02-05

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Jing Sun ,  Tamer Kadous

IPC: H04W74/08

Abstract: Physical random access channel (PRACH) configuration on new radio unlicensed (NR-U) networks is disclosed. A UE may perform PRACH transmission either with a transmission opportunity (TXOP) or outside of a TXOP. The UE monitors for a control signal, such as a preamble or common control signal, identifying a TXOP. The UE may obtain an autonomous random access configuration for communications outside of the current TXOP that identifies a random access slot includes a plurality of random access occasions. If the UE fails to detect the control signal, it transmits an autonomous random access signal in a random access occasion corresponding to a beam direction of its location in relation to the base station. Otherwise, upon detection of the control signal and receipt of a trigger signal, the UE may transmit a random access request within the TXOP.

公开(公告)号：US20190246410A1

公开(公告)日：2019-08-08

申请号：US16268278

申请日：2019-02-05

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Jing Sun ,  Tamer Kadous

IPC: H04W72/12 ,  H04W72/04

CPC classification number: H04W72/1263 ,  H04W72/0446

Abstract: Synchronization signal block (SSB) multiplexing and remaining material system information (RMSI) monitoring in new radio unlicensed (NR-U) networks are disclosed. For SSB multiplexing, a user equipment (UE) receives an SSB configuration for a discovery signal detection window having a plurality of communication slots, wherein, based on the SSB configuration, UE identifies random access resource and time and frequency locations to monitor remaining minimum system information (RMSI) configured for each SSB. The UE further receives an SSB transmission indicator that reflects a listen before talk (LBT) result, which it may use with the SSB configuration to map one or more SSB for rate matching in selected slots. The UE can then rate match any data transmissions around the identified SSBs in those identified slots regardless of LBT result. The UE may further leverage the SSB configuration and indication of LBT result to monitor SSB transmissions for control resource set (CORESET) transmissions.

公开(公告)号：US10349404B2

公开(公告)日：2019-07-09

申请号：US15493099

申请日：2017-04-20

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Andrei Dragos Radulescu ,  Chirag Patel ,  Tao Luo ,  Tamer Kadous

IPC: H04W4/00 ,  H04W72/04 ,  H04W72/10 ,  H04W48/16 ,  H04L5/00 ,  H04W16/14 ,  H04W68/00

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may monitor for discovery reference signal (DRS) transmissions, physical downlink shared channel (PDSCH) transmissions, or combinations thereof within a DRS transmission window. The UE may attempt to decode DRS or PDSCH transmissions for a subframe based on detection of DRS transmissions, prioritization of DRS transmissions relative to PDSCH transmissions, locations of subframes within a radio frame, overlapping of the DRS transmission window with a paging opportunity, or any combination thereof. In some cases, one or more radio link monitoring (RLM) parameters may be adjusted based on decoding of PDSCH or DRS transmissions.

公开(公告)号：US20190174542A1

公开(公告)日：2019-06-06

申请号：US16204800

申请日：2018-11-29

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Jing Sun ,  Tamer Kadous

IPC: H04W74/08 ,  H04L1/00 ,  H04L1/06 ,  H04W72/08 ,  H04W74/00

Abstract: Subband based uplink access for new radio (NR) shared spectrum (NR-SS) is disclosed. A base station performs a listen before talk (LBT) procedure on system allocated subbands of a shared communication channel. The base station determines a first set of candidate subbands that are signaled to a user equipment (UE). The UE performs an LBT procedure on the first set to identify a second set of candidate subbands including the successful LBT subbands of the first set. Aspects of the disclosure provide for managing and refining the subbands for transmissions. A first aspect provides the UE to determine a transmission behavior based on mismatch between the first and second sets. A second aspect provides the first and second sets in handshaking between the base station and UE for refining the eventual transmission set of subbands. A third aspect provides cross-band LBT reporting for further refining subband selection in later slots.

公开(公告)号：US20190158333A1

公开(公告)日：2019-05-23

申请号：US16168629

申请日：2018-10-23

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Yongbin Wei ,  Tamer Kadous ,  Zhifei Fan ,  Jing Sun

IPC: H04L27/26 ,  H04L27/227 ,  H04W72/04 ,  H04L25/02

Abstract: Methods, systems, and devices for wireless communications are described. In some wireless systems, different wireless devices may communicate using different radio access technologies (RATs) in a shared radio frequency spectrum. Prior to communicating on a channel in the shared radio frequency spectrum, a wireless device may transmit a training field as part of a preamble in a transmission on the channel to reserve the channel for the transmission. As described herein, a training field transmitted by a wireless device using one RAT may be transmitted with an autocorrelation property associated with training fields of another RAT. As such, a wireless device configured to communicate using the other RAT may be able to receive and identify the training field (e.g., based on the autocorrelation property), and the wireless device may use the additional techniques described herein to determine an availability of the channel based on the training field.

公开(公告)号：US20190150088A1

公开(公告)日：2019-05-16

申请号：US16187836

申请日：2018-11-12

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Taesang Yoo ,  Aleksandar Damnjanovic ,  Tamer Kadous ,  Yongbin Wei

IPC: H04W52/02 ,  H04W74/08

Abstract: Techniques are described herein for using a signal to wake up a user equipment (UE) that is in a low-power mode in a synchronized wireless communication system operating a shared radio frequency spectrum band. Once a base station wins a contention for a transmission opportunity in the shared radio frequency spectrum band, the base station may transmit a single signal before the transmission opportunity. After receiving the signal, the UE may begin monitoring for control information (e.g., control resource sets) associated with slots in the transmission opportunity. If the control information indicates that the content of the slot is for the UE, the UE may monitor the slot for its content.

公开(公告)号：US20190141783A1

公开(公告)日：2019-05-09

申请号：US16180938

申请日：2018-11-05

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Srinivas Yerramalli ,  Kaushik Chakraborty ,  Tamer Kadous

IPC: H04W88/06 ,  H04W74/08 ,  H04L27/26 ,  H04L5/00 ,  H04W76/27 ,  H04W8/24

CPC classification number: H04W88/06 ,  H04L5/0007 ,  H04L5/001 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0098 ,  H04L27/261 ,  H04L27/2666 ,  H04W8/24 ,  H04W36/06 ,  H04W74/0833 ,  H04W76/15 ,  H04W76/27 ,  H04W88/02 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communications are described that provide for activating and deactivating high-band connections, such as millimeter wave (mmW) connections while maintaining a low-band connection, based on a state of a user equipment (UE). An initial low-band connection, such as a connection that uses lower frequencies than mmW frequencies, may be established by a UE and a base station, and the base station may configure the UE for one or more high-band connections with one or more high-band base stations. The base station may provide an activation command to the UE to activate a high-band connection, and the UE may determine a currently supported mode for the activated high-band connection and establish the high-band connection based on the currently supported mode.