公开(公告)号：US10484212B2

公开(公告)日：2019-11-19

申请号：US16041436

申请日：2018-07-20

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Dinkar Vasudevan ,  Seyedkianoush Hosseini ,  Jing Sun ,  Xiaoxia Zhang ,  Siddhartha Mallik ,  Juan Montojo

IPC: H04L12/28 ,  H04L25/03 ,  H04B17/14 ,  H04L27/34 ,  H04L12/703 ,  H04B7/024 ,  H04L25/02 ,  H04B17/11 ,  H04B17/30 ,  H04B17/309

Abstract: Wireless communications systems and methods related to over-the-air uplink-downlink (UL-DL) reciprocity calibration. A central unit transmits downlink (DL) calibration reference signal (RS) and a calibration request. The central unit receives, in response to the calibration request, a first uplink (UL) calibration RS and a first DL channel estimate associated with a first transmission point (TP) and a first wireless communication device. The central unit transmits a DL coordinated multipoint (CoMP) joint transmission signal according to an uplink-downlink (UL-DL) reciprocity calibration. The UL-DL reciprocity calibration is based on at least a first UL channel estimate based on the first UL calibration RS, the first DL channel estimate, a second UL channel estimate associated with a second TP and the first wireless communication device, and a second DL channel estimate associated with the second TP and the first wireless communication device.

公开(公告)号：US10484146B2

公开(公告)日：2019-11-19

申请号：US15711652

申请日：2017-09-21

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Jing Jiang

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

Abstract: Methods and Apparatus are provided for downlink retransmission of Code Block Groups (CBGs) when CBG level ACK and NACK feedback is unreliable. A User Equipment (UE) transmits to a Base Station (BS) feedback indicating an Acknowledgement (ACK) or a Negative Acknowledgement (NACK) corresponding to each of received set of CBGs transmitted by the BS to the UE. The BS receives and decodes the feedback and transmits back to the UE information regarding a result of the decoding. The UE, based on the received information, determines whether the BS correctly received and decoded the ACK/NACK feedback, and in some cases, ACKs and NACKs corresponding to which CBGs were incorrectly decoded by the BS. The UE processes retransmitted CBGs received from the BS based on this determination.

公开(公告)号：US10484144B2

公开(公告)日：2019-11-19

申请号：US15808568

申请日：2017-11-09

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Wanshi Chen ,  Jing Sun ,  Shimman Patel ,  Ozcan Ozturk

IPC: H04L1/18 ,  H04L5/00 ,  H04W72/12 ,  H04L1/08

Abstract: The present disclosure may enable a buffer to accommodate HARQ processes for transmissions with different TTIs when the UE is configured for legacy communications and ULL communications. The apparatus may allocate a first number of HARQ IDs to a first portion of a buffer, the first number of HARQ IDs being associated with a first transmission TTI HARQ process. In addition, the apparatus may allocate a second number of HARQ IDs to a second portion of the buffer. In an aspect, the second number of HARQ IDs may be associated with a second TTI HARQ process. In addition, the first portion and second portion may not change a total buffer size. The apparatus may also receive a HARQ response associated with a HARQ ID allocated to the first portion or the second portion.

公开(公告)号：US10447457B2

公开(公告)日：2019-10-15

申请号：US15648159

申请日：2017-07-12

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Seyedkianoush Hosseini ,  Peter Gaal ,  Jing Sun ,  Shimman Arvind Patel

IPC: H04L5/00 ,  H04L27/26

Abstract: Methods, systems, and devices for wireless communication are described that provide for identifying uplink transmissions that are to be made using shortened transmission time intervals (sTTIs), and allocating uplink resources for such transmissions. A portion of the uplink resources may be reserved for reference signal transmissions, such as demodulation reference signal (DMRS) transmissions. Resources for a number of sTTIs may be aligned within a slot that comprises a number of orthogonal frequency division multiplexing (OFDM) symbols, and one of the OFDM symbols may have resources reserved that are to be shared by two or more sTTIs within the slot for DMRS transmission. The reserved OFDM symbol may be shared by two overlapping sTTIs in which the reserved OFDM symbol is common between the two sTTIs. A DMRS sequence for each sTTI may be selected based on the allocated uplink resources for the sTTIs.

公开(公告)号：US20190313419A1

公开(公告)日：2019-10-10

申请号：US16373047

申请日：2019-04-02

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Jing Sun ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W72/08 ,  H04B1/713 ,  H04W72/04 ,  H04L1/00 ,  H04W28/02 ,  H04L1/18 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. In systems supporting multiple communication protocol types (e.g., ultra-reliable low-latency communication and enhance mobile broadband communication), a user equipment may implement multiplexing rules for handling overlapping transmissions of different communication protocols. For example, if lower latency data supports multiplexing with higher latency data and a lower latency resource overlaps (either partially or completely) with a higher latency resource, a number of options can be taken to control multiplexing. Similarly, if low latency uplink control information supports multiplexing with a slot-based physical uplink shared channel, and the physical uplink shared channel has its own uplink control information, a number of options can be taken to control multiplexing. If slot-based uplink control information overlaps (either partially or completely) with low latency data, then, likewise, a number of options can be taken to control multiplexing. Controlling multiplexing may support meeting low latency thresholds.

公开(公告)号：US20190313321A1

公开(公告)日：2019-10-10

申请号：US16373475

申请日：2019-04-02

Applicant: QUALCOMM Incorporated

Inventor： Huilin Xu ,  Heechoon Lee ,  Jing Sun ,  Wanshi Chen

IPC: H04W48/12 ,  H04W72/04

Abstract: Improved methods, systems, devices, or apparatuses that support search space design are described. The described techniques enhance the number and utility of applied control channel candidates in the presence of blind decoding and control channel element (CCE) channel estimation limitations. The techniques allocate available blind decodes using a nested mapping scheme over one or more dimensions, based on a prioritization. In some other cases, the number of blind decodes may be allocated, either uniformly, or proportionally, between the plurality of search space set occasions. In some cases, the applied control channel candidates may be determined by dropping control channel candidates along one or more dimensions (e.g., search space set, or search space set occasion), until the blind decoding limitation or CE limitation is satisfied.

公开(公告)号：US20190297620A1

公开(公告)日：2019-09-26

申请号：US16359247

申请日：2019-03-20

Applicant: QUALCOMM Incorporated

Inventor： Qingjiang Tian ,  Xiaoxia Zhang ,  Jing Sun ,  Srinivas Yerramalli

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

Abstract: Wireless communications systems and methods related to communicating uplink control information (UCI) in a network operating over multiple aggregated unlicensed carriers are provided. A first wireless communication device communicates, with a second wireless communication device, a downlink communication signal. The first wireless communication device communicates, with the second wireless communication device, an unscheduled uplink communication signal including an uplink report associated with the downlink communication signal, the unscheduled uplink communication signal communicated based on a listen-before-talk (LBT) procedure. The uplink report includes at least one of an acknowledgement (ACK) for data in the downlink communication signal, a negative-acknowledgement (NACK) for the data in the downlink communication signal, or channel information based at least on the downlink communication signal.

公开(公告)号：US20190297604A1

公开(公告)日：2019-09-26

申请号：US16360961

申请日：2019-03-21

Applicant: QUALCOMM Incorporated

Inventor： Heechoon Lee ,  Peter Pui Lok Ang ,  Wanshi Chen ,  Huilin Xu ,  Jing Sun ,  Tao Luo

IPC: H04W72/04 ,  H04W72/12 ,  H04L5/00

Abstract: Systems and methods configured to provide size matching of downlink control information (DCI) formats to restrict a number of DCI format sizes for a set of DCI formats for concurrent use are described. In accordance with embodiments of the present disclosure, size matching at least two DCI formats of a set of DCI formats to restrict a number of DCI format sizes for the set of DCI formats for concurrent use is implemented. Restrictions with respect to the number of DCI format sizes for the set of DCI formats may correspond both to a first number of DCI sizes parameter based on a total number of DCI format sizes per wireless communication slot, and to a second number of DCI sizes parameter based on a total number of DCI format sizes for DCI formats used to carry DCI payload encoded using an identifier per wireless communication slot.

公开(公告)号：US20190296847A1

公开(公告)日：2019-09-26

申请号：US16360810

申请日：2019-03-21

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Huilin Xu ,  Heechoon Lee

IPC: H04J11/00 ,  H04W24/10 ,  H04L25/02 ,  H04W72/04 ,  H04W8/26

Abstract: Methods, systems, and devices for wireless communication are described. In some cases, due to blind decoding and channel estimation (CE) limits, one or more user equipment (UE) specific search sets may be pruned for blind decoding and/or CE purposes. For instance, after hashing a set of common decoding candidates to control channel elements (CCEs) within the control region, the UE specific search sets may be pruned so as to conform to the blind decode limitation, since a common search space has already occupied a portion of the total blind decode limit. Following pruning, the UE may hash the sets of UE-specific decoding candidates associated with the one or more UE specific search sets to CCEs within the control region. The UE may further prune UE specific search sets, based on CE limits, while reusing CE for overlapping hashed locations.

公开(公告)号：US10412733B2

公开(公告)日：2019-09-10

申请号：US15710698

申请日：2017-09-20

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Seyedkianoush Hosseini ,  Jing Jiang

IPC: H04W72/04 ,  H04L1/18

Abstract: Techniques are described that provide for generation of a first transport block (TB) that includes a number of code blocks (CBs) that are transmitted to a receiver during a first transmission time interval (TTI) having a first duration, and retransmission of any unsuccessfully received CBs in a second TTI having a duration that is selected from multiple available TTI durations. The second TTI may have a second TTI duration that is shorter than the first TTI duration, and may have CBs only from the first TB. One or more of a time duration or frequency resources of the second TTI may be selected based on the number of CBs that are retransmitted in the second TTI.