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公开(公告)号：US20230232329A1
公开(公告)日：2023-07-20
申请号：US17997124
申请日：2020-06-18
Applicant: Siyi CHEN , Jing SUN , Changlong XU , Xiaoxia ZHANG , Hao XU , QUALCOMM INCORPORATED
Inventor： Siyi CHEN , Jing SUN , Changlong XU , Xiaoxia ZHANG , Hao XU
CPC classification number: H04W52/0235 , H04W52/0241 , H04W24/10 , H04W4/33
Abstract: The apparatus of wireless communication is a UE. The UE out of coverage of any base station may operate in a VLP mode and set a signal transmission power to a first power level. The UE may detect and connect to a base station, switch the power mode of UE based on a power mode of the base station connected by the UE, and switch the signal transmission power from the first power level to the second power level greater than the first power level. When the UE detects equal to or more than two base stations, the UE may select the base station from the equal to or more than two base stations detected based on a condition and connect to the base station selected from the two detected base stations.
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公开(公告)号：US20220386240A1
公开(公告)日：2022-12-01
申请号：US17754979
申请日：2019-11-18
Applicant: Changlong XU , Jing SUN , Xiaoxia ZHANG , QUALCOMM Incorporated
Inventor： Changlong XU , Jing SUN , Xiaoxia ZHANG
IPC: H04W52/02
Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may monitor a subset of time resources in a wake up signal (WUS) pool, wherein the WUS pool includes contiguous candidate time resources for receiving a WUS. The UE may detect the WUS based at least in part on monitoring the subset of time resources. Numerous other aspects are provided.
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公开(公告)号：US11228394B2
公开(公告)日：2022-01-18
申请号：US16765066
申请日：2018-09-24
Applicant: Kai Chen , Changlong Xu , Jing Jiang , Gabi Sarkis , Hao Xu , Qualcomm Incorporated
Inventor： Kai Chen , Changlong Xu , Jing Jiang , Gabi Sarkis , Hao Xu
Abstract: Methods, systems, and devices for wireless communications are described. In some systems, wireless devices may encode and decode transmissions using polar codes. A transmitting device may encode a payload based on a selected payload size. For example, the transmitting device may construct a bit vector including payload bits, parity bits, frozen bits, or some combination of these, and may modify the bits or the order of the bits based on the selected payload size. The device may generate a polar-encoded codeword based on this bit vector, and may transmit the polar-encoded codeword to a receiving device. The receiving device may blind decode the polar-encoded codeword, and may determine the correct payload size based on the decoded bit vector. For example, the device may perform decoding or may check decoded bits based on a payload size hypothesis, where the decoding may fail for any incorrect payload size hypothesis.
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公开(公告)号：US11146296B2
公开(公告)日：2021-10-12
申请号：US15733711
申请日：2019-04-02
Applicant: QUALCOMM Incorporated , Kai Chen , Changlong Xu , Liangming Wu , Jing Jiang , Hao Xu
Inventor： Kai Chen , Changlong Xu , Liangming Wu , Jing Jiang , Hao Xu
Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an encoding device may determine a least reliable subset of information bits included in a set of information bits that includes a predefined active set of information bits to be encoded; may determine a codeword bit to be added to a codeword based at least in part on the least reliable subset of information bits, wherein adding the codeword bit to the codeword improves reliability of the least reliable subset of information bits; may add the codeword bit to the codeword; and may transmit the codeword. Numerous other aspects are provided.
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公开(公告)号：US20210234639A1
公开(公告)日：2021-07-29
申请号：US17054917
申请日：2019-05-28
Applicant: Kai CHEN , Jian LI , Changlong XU , Liangming WU , Hao XU , Qualcomm incorporated
Inventor： Kai CHEN , Jian LI , Changlong XU , Liangming WU , Hao XU
Abstract: A device may identify that an incremental redundancy hybrid automatic repeat request (IR-HARQ) scheme is used in association with sequential transmissions of an information bit vector to or from another wireless device, where each transmission in the scheme is associated with a resource size. The device may identify a mother code length for a polar code based at least in part on an aggregate resource size associated with the sequential transmissions. The device may identify an adjusted bit index set for the polar code based at least in part on the IR-HARQ scheme. The device may transmit (or receive), for each transmission of the information bit vector, a respective subset of encoded bits generated by mapping the information bit vector to a set of polarized bit channels of the polar code in accordance with the bit index set.
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Patent Agency Ranking
公开(公告)号：US20210105089A1
公开(公告)日：2021-04-08
申请号：US15733499
申请日：2019-01-17
Applicant: Kai CHEN , Liangming WU , Changlong XU , Jian UI , Hao XU , QUALCOMM Incorporated
Inventor： Kai CHEN , Liangming WU , Changlong XU , Jian LI , Hao XU
Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may perform a first polar code encoding process on a first transmission of a hybrid automatic repeat request (HARQ) process; generate a second transmission of the HARQ process by relocating a portion of bits in less reliable positions of the first transmission to more reliable positions of the second transmission of the HARQ process, wherein the less reliable positions and the more reliable positions are evaluated based at least in part on a channel transform, wherein the channel transform is based at least in part on the first transmission, the second transmission, the first polar encoding process and a second polar encoding process associated with the second transmission; and transmit the second transmission of the HARQ process. Numerous other aspects are provided.
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公开(公告)号：US20200099469A1
公开(公告)日：2020-03-26
申请号：US16467463
申请日：2017-12-07
Applicant: Jing JIANG , Gabi SARKIS , Yang YANG , Shrinivas KUDEK , Josph Binamira SORIAGA , Hari SANKAR , Changlong XU , Chao WEI , Shrinivas KUDEKAR , Qualcomm Incorporated
Inventor： Jing Jiang , Gabi Sarkis , Yang Yang , Shrinivas Kudekar , Joseph Binamira Soriaga , Hari Sankar , Changgiong Xu , Chao Wei
IPC: H04L1/00
Abstract: Methods, systems, and devices for encoding and decoding are described. To encode a vector, an encoder allocates information bits of the vector to channel instances of a channel that are separated into groups. The groups may vary in size and allocation of the information bits is based on a base sequence of a given length. During decoding, a decoder assigns different bit types to channels instances by dividing a codeword into a plurality of groups and assigning bit types to channel instances of the plurality of groups using the base sequence.
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公开(公告)号：US09247452B2
公开(公告)日：2016-01-26
申请号：US13995708
申请日：2012-09-12
Applicant: Changlong Xu
Inventor： Changlong Xu
Abstract: The techniques introduced here provide a single, passive radio link control entity with a unified interface. The unified interface is configured to receive a request for a RLC service of a plurality of RLC services from upper and lower protocol layers. The unified interface is coupled with a processing module to process the request. The radio link control entity further includes a plurality of data transfer modules configured to provide data transfer between upper and lower protocol layers, the interface modules are coupled with the processing module and the unified interface. The single, passive radio link control entity provides bi-directional data transfer services for TM, UM, and AM data transmissions.
Abstract translation: 这里介绍的技术提供了具有统一接口的单个被动无线电链路控制实体。 统一接口被配置为从上层协议层和下协议层接收对多个RLC服务的RLC服务的请求。 统一接口与处理模块相结合来处理请求。 无线链路控制实体还包括多个数据传输模块，被配置为提供上层和下层协议层之间的数据传输，接口模块与处理模块和统一接口相连。 单个无源无线链路控制实体为TM，UM和AM数据传输提供双向数据传输服务。
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公开(公告)号：US20140362767A1
公开(公告)日：2014-12-11
申请号：US13995708
申请日：2012-09-12
Applicant: Changlong Xu
Inventor： Changlong Xu
Abstract: The techniques introduced here provide a single, passive radio link control entity with a unified interface. The unified interface is configured to receive a request for a RLC service of a plurality of RLC services from upper and lower protocol layers. The unified interface is coupled with a processing module to process the request. The radio link control entity further includes a plurality of data transfer modules configured to provide data transfer between upper and lower protocol layers, the interface modules are coupled with the processing module and the unified interface. The single, passive radio link control entity provides bi-directional data transfer services for TM, UM, and AM data transmissions.
Abstract translation: 这里介绍的技术提供了具有统一接口的单个被动无线电链路控制实体。 统一接口被配置为从上层协议层和下协议层接收对多个RLC服务的RLC服务的请求。 统一接口与处理模块相结合来处理请求。 无线链路控制实体还包括多个数据传输模块，被配置为提供上层和下层协议层之间的数据传输，接口模块与处理模块和统一接口相连。 单个无源无线链路控制实体为TM，UM和AM数据传输提供双向数据传输服务。
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公开(公告)号：US20140064391A1
公开(公告)日：2014-03-06
申请号：US13878708
申请日：2010-10-11
Applicant: Peng Cheng , Changlong Xu , Xuebin Yang , Feng Zhou , Yang Gao
Inventor： Peng Cheng , Changlong Xu , Xuebin Yang , Feng Zhou , Yang Gao
IPC: H04L25/03
CPC classification number: H04L25/03197 , H04B7/024 , H04B7/0413 , H04B7/0452 , H04B17/345
Abstract: A system and methods for estimating a noise power level in an uplink signal for a virtual MIMO system is disclosed. The system comprises a demodulation reference signal (DMRS) module configured to obtain a DMRS receive symbol from the uplink signal and determine a DMRS sequence for a first UE in the virtual MIMO system. An autocorrelation module is configured to calculate an average autocorrelation value for the subcarriers in the uplink signal. A cross-correlation module is configured to calculate first and second cross-correlation values of the uplink signal Rz (l) for values of l selected such that the sum of the received power from the first UE and the second UE can be accurately estimated. A noise power level module is configured to determine the noise power level for the uplink signal using the average autocorrelation value and the first and second cross correlation values.
Abstract translation: 公开了一种用于估计虚拟MIMO系统的上行链路信号中的噪声功率电平的系统和方法。 该系统包括解调参考信号（DMRS）模块，其被配置为从上行链路信号获得DMRS接收符号，并确定虚拟MIMO系统中的第一UE的DMRS序列。 自相关模块被配置为计算上行链路信号中的子载波的平均自相关值。 互相关模块被配置为针对所选择的l的值计算上行链路信号Rz（1）的第一和第二互相关值，使得可以准确地估计来自第一UE和第二UE的接收功率之和。 噪声功率电平模块被配置为使用平均自相关值和第一和第二互相关值来确定上行链路信号的噪声功率电平。
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