公开(公告)号：US20200313731A1

公开(公告)日：2020-10-01

申请号：US16820354

申请日：2020-03-16

Applicant: QUALCOMM Incorporated

Inventor： Timothy Paul PALS ,  Alberto RICO ALVARINO ,  Amir FARAJIDANA ,  Honey KAKKAR ,  Parastoo KHEIRKHAH ,  Nitin PANT ,  Umesh PHUYAL ,  Wenshu ZHANG ,  Manish JAIN

IPC: H04B7/0417 ,  H04B7/0452 ,  H04W8/24 ,  H04B7/06

Abstract: Certain aspects of the present disclosure provide techniques for reducing a quantity of data sent carrier aggregation (CA) related capability reporting by a UE operating in a cell using full dimension multiple-input multiple-output (FD-MIMO) techniques. In an exemplary method, a base station obtains a relative weight of baseband processing for a component carrier (CC) configured for full-dimension multiple-input multiple-output (FD-MIMO) communications for a user equipment (UE); determines, based on the relative weight, to enable FD-MIMO downlink (DL) transmissions to the UE via the CC; and transmits an FD-MIMO transmission via the CC to the UE.

公开(公告)号：US20180288624A1

公开(公告)日：2018-10-04

申请号：US15937212

申请日：2018-03-27

Applicant: QUALCOMM Incorporated

Inventor： Wenshu ZHANG ,  Chengjin ZHANG ,  Alexei Yurievitch GOROKHOV ,  Amir AMINZADEH GOHARI ,  Yongle WU ,  Supratik BHATTACHARJEE

IPC: H04W16/14 ,  H04L5/00 ,  H04W48/16 ,  H04L27/26

Abstract: Aspects of the present disclosure provide a plurality of discovery reference signal (DRS) search modes implemented by the user equipment (UE) during contention-based communication in an unlicensed spectrum. The plurality of DRS search modes may include a first DRS search mode (“Full search mode”), second DRS search mode (“Comb search mode”), and a third DRS search mode (“Thin search mode”). The DRS search modes may be selected by the UE based on the system requirements (e.g., tradeoffs between robustness and complexity against cycle cost). Features of the present disclosure further provide techniques for dynamically switching between the plurality of DRS search modes in order to minimize power consumption while reducing the number of cycles required to locate the DRS.

公开(公告)号：US20180176040A1

公开(公告)日：2018-06-21

申请号：US15841527

申请日：2017-12-14

Applicant: QUALCOMM Incorporated

Inventor： Yongle WU ,  Pengkai ZHAO ,  Supratik BHATTACHARJEE ,  Amir FARAJIDANA ,  Wenshu ZHANG ,  Michael Lee MCCLOUD

IPC: H04L25/02

Abstract: Certain aspects of the present disclosure relate to techniques for estimating a channel using soft-windowing. A user equipment (UE) may determine, based on a cyclic prefix (CP) length of a channel, a timing window for sampling reference signals transmitted on the channel, determine a set of weights to apply to samples obtained within the determined timing window, wherein each weight corresponds to a sample obtained within the determined window, and estimate the channel by applying the weights to the samples.

公开(公告)号：US20240323126A1

公开(公告)日：2024-09-26

申请号：US17768260

申请日：2020-10-29

Applicant: Qualcomm Incorporated

Inventor： Leena ZACHARIAS ,  Arnaud MEYLAN ,  Roland RICK ,  Ping ZHOU ,  Wenshu ZHANG ,  Hobin KIM ,  Jean-Marie Quoc Danh TRAN ,  Narasimhan AGARAM ,  Jittra JOOTAR ,  Sitaramanjaneyulu KANAMARLAPUDI

IPC: H04L47/10 ,  H04W28/06 ,  H04W28/10

CPC classification number: H04L47/23 ,  H04W28/06 ,  H04W28/10

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a throttling indicator for a shared resource associated with a modem at the UE. The CE may determine a configuration of the modem based on a configuration received from a Radio Resource Control layer of the UE. Based on the modem configuration and the throttling indicator, the UE may identify a throttling level to apply to the modem. The UE may adjust the modem configuration for communicating with a base station based on the throttling level in order to reduce resource usage below a usage threshold. By reducing usage of the shared resource by the modem, the UE may have a greater availability of the shared resource to meet the needs of other components of the UE. This may provide an improved user experience at the UE, among other benefits.

公开(公告)号：US20180254797A1

公开(公告)日：2018-09-06

申请号：US15884317

申请日：2018-01-30

Applicant: QUALCOMM Incorporated

Inventor： Pooyan AMINI ,  Amir FARAJIDANA ,  Sibasish DAS ,  Wenshu ZHANG ,  Supratik BHATTACHARJEE ,  Tao LUO

IPC: H04B1/7107 ,  H04W72/04 ,  H04W36/00 ,  H04L1/16

CPC classification number: H04B1/7107 ,  H04J11/004 ,  H04J11/005 ,  H04L1/1607 ,  H04L1/1812 ,  H04L5/005 ,  H04L5/0073 ,  H04W36/0066 ,  H04W72/042 ,  H04W72/0446

Abstract: An apparatus may receive a downlink subframe from a serving base station. The downlink subframe may include interference associated with a second subframe transmitted by an intra-frequency neighboring cell (IFNC). The apparatus may detect whether there are interfering cell-specific reference signals (CRS) in one or more symbols of the second subframe. The apparatus may determine, based on whether interfering CRS are detected in the one or more symbols of the second subframe, a subframe type of the second subframe. The apparatus may cancel detected interfering CRS from the received downlink subframe based on the determined subframe type of the second subframe.

公开(公告)号：US20150071387A1

公开(公告)日：2015-03-12

申请号：US14191243

申请日：2014-02-26

Applicant: QUALCOMM Incorporated

Inventor： Xiliang LUO ,  Wenshu ZHANG ,  Keith William SAINTS ,  Ke LIU ,  Kapil BHATTAD ,  Alexei Yurievitch GOROKHOV

IPC: H04L1/00

CPC classification number: H04L1/0054 ,  H04L5/0023 ,  H04L5/005 ,  H04L25/0212 ,  H04L25/067 ,  H04L27/2656 ,  H04L27/2675

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for blind detection of cell-specific reference signals. Methods and apparatus are provided for detecting a cell-specific reference signal (CRS) in an orthogonal frequency division multiplexed (OFDM) symbol by a user equipment (UE). The method generally includes predicting a current channel response of a current OFDM symbol based on a channel response of at least one previous OFDM symbol, estimating a noise power level of the current OFDM symbol, forming a log likelihood ratio (LLR) of two detection hypotheses based on the predicted current channel response and the estimated noise power level, comparing the LLR to a pre-determined threshold, and determining that at least one CRS is present in the current OFDM symbol based on the comparison.

Abstract translation: 本公开的某些方面涉及盲细胞特异性参考信号的盲检测方法和装置。 提供了用于由用户设备（UE）检测正交频分复用（OFDM）符号中的小区特定参考信号（CRS）的方法和装置。 该方法通常包括基于至少一个先前OFDM符号的信道响应来预测当前OFDM符号的当前信道响应，估计当前OFDM符号的噪声功率电平，形成两个检测假设的对数似然比（LLR） 基于预测的当前信道响应和估计的噪声功率电平，将LLR与预定阈值进行比较，并且基于该比较确定当前OFDM符号中存在至少一个CRS。

公开(公告)号：US20200329369A1

公开(公告)日：2020-10-15

申请号：US16798221

申请日：2020-02-21

Applicant: QUALCOMM Incorporated

Inventor： Timothy Paul PALS ,  Alberto RICO ALVARINO ,  Amir FARAJIDANA ,  Honey KAKKAR ,  Parastoo KHEIRKHAH ,  Nitin PANT ,  Umesh PHUYAL ,  Wenshu ZHANG

IPC: H04W8/24 ,  H04B7/0417 ,  H04L1/00

Abstract: Aspects are provided which allow an apparatus to efficiently indicate downgraded band combinations associated with carrier aggregation (CA) to a base station, in which one or more UE capabilities such as the DL MIMO of certain supported band combinations may be downgraded in exchange for other UE capabilities such as FD-MIMO and 256/1024QAM. The apparatus, which may be a UE, receives a request from a base station for information associated with downgraded band combinations and for information corresponding to at least one UE capability associated with each of the downgraded band combinations. After receiving the request, the UE sends, to the base station, information indicating the downgraded band combinations and the at least one UE capability. The UE may thus report downgraded band combinations for a subset of supported band combinations as requested by the base station, thereby minimizing capability reporting of the UE.

公开(公告)号：US20190253229A1

公开(公告)日：2019-08-15

申请号：US16270546

申请日：2019-02-07

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush HOSSEINI ,  Amir FARAJIDANA ,  Ahmed Omar Desouky ALI ,  Thiagarajan SIVANADYAN ,  Wenshu ZHANG ,  Pengkai ZHAO

IPC: H04L5/00

CPC classification number: H04L5/0094 ,  H04L5/0007

Abstract: Systems, apparatuses, and methods for computing transport block size (TB S) for channels with shortened transmission time interval (sTTI). An initial size may be determined based on one or more TBS tables. The initial size may be scaled by a factor associated with an sTTI channel. A TBS table is selected based on the one or more TBS tables. The scaled size may be rounded based on the selected TBS table to generate a TBS for the sTTI channel.

公开(公告)号：US20190261328A1

公开(公告)日：2019-08-22

申请号：US16276258

申请日：2019-02-14

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush HOSSEINI ,  Shashank MAIYA ,  Amir FARAJIDANA ,  Wenshu ZHANG

IPC: H04W72/04 ,  H04L5/00

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may identify that a last resource block of a resource allocation for a physical downlink shared channel (PDSCH) is in a last allocable resource block group (RBG); and determine whether one or more additional resource blocks, subsequent to the last resource block, are included in the resource allocation for the PDSCH based at least in part on at least one of a reference signal type associated with the PDSCH, a quantity of the one or more additional resource blocks, or the DCI format associated with the PDSCH. Numerous other aspects are provided.

公开(公告)号：US20180007575A1

公开(公告)日：2018-01-04

申请号：US15635547

申请日：2017-06-28

Applicant: QUALCOMM Incorporated

Inventor： Vaibhav SINGHAL ,  Heechoon LEE ,  Alexei Yurievitch GOROKHOV ,  Sarabjot Singh KHANGURA ,  Chengjin ZHANG ,  Amir FARAJIDANA ,  Amir AMINZADEH GOHARI ,  Wenshu ZHANG

IPC: H04W24/08 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04W24/08 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0057 ,  H04L5/006 ,  H04L5/0085 ,  H04L27/26 ,  H04W24/04 ,  H04W72/042 ,  H04W72/0446 ,  H04W76/15 ,  H04W76/19 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/23 ,  Y02D70/24

Abstract: In wireless communication networks using carrier aggregation including a secondary component carrier in unlicensed spectrum, a user equipment (UE) may monitor a downlink radio link quality of secondary cells for an event indicating failure of a communication link in the unlicensed spectrum with a secondary cell. The UE detects one or more failure events based on the downlink radio link quality. When a designated set of failure events is detected, the UE declares a failure state on the secondary cell. In response to the failure state, the UE may adjust operations related to the secondary component carrier in the unlicensed spectrum in order to save power and resources.