公开(公告)号：US11677506B2

公开(公告)日：2023-06-13

申请号：US16765557

申请日：2017-11-20

申请人： Changlong Xu ,  Hao Xu ,  Jing Jiang ,  Qualcomm Incorporated

发明人： Changlong Xu ,  Hao Xu ,  Jing Jiang

IPC分类号： H04L1/1812 ,  H04L1/1825 ,  H04L1/1867 ,  H04L1/1829 ,  H04L1/1803 ,  H04W76/27 ,  H04L1/20 ,  H04W72/54

CPC分类号： H04L1/1812 ,  H04L1/1803 ,  H04L1/188 ,  H04L1/1825 ,  H04L1/1848 ,  H04L1/1896 ,  H04L1/1887 ,  H04L1/203 ,  H04W72/54 ,  H04W76/27

摘要： Methods, systems, and devices for wireless communications are described. Some wireless communications systems may support hybrid automatic repeat request (HARQ) schemes to improve the likelihood that information is received correctly over a wireless communications link. In HARQ, when a transmitting device determines that a receiving device failed to successfully decode a transmission of information, the transmitting device may retransmit the information to the receiving device. In some cases, HARQ techniques may be used for communications associated with different types of services. In such cases, to keep the latency of communications within a latency budget for a particular type of service, wireless devices may utilize the techniques described herein to dynamically terminate HARQ retransmissions. For instance, a transmitting device may avoid retransmitting information when an amount of time that has elapsed since an original transmission of the information has exceeded the latency budget.

公开(公告)号：US11171672B2

公开(公告)日：2021-11-09

申请号：US16471388

申请日：2018-01-16

申请人： Jian Li ,  Changlong Xu ,  Chao Wei ,  Jilei Hou ,  Jing Jiang ,  QUALCOMM Incorporated

发明人： Jian Li ,  Changlong Xu ,  Chao Wei ,  Jilei Hou ,  Jing Jiang

IPC分类号： H03M13/35 ,  H03M7/30 ,  H03M13/09 ,  H03M13/13 ,  H03M13/29 ,  H04L1/00

摘要： Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus for dynamic frozen polar codes, for example, for control channels. An exemplary method may be performed at the encoder. The method generally includes encoding a stream of bits using a polar code. The encoding includes selecting a first set of channel indices for encoding information bits. The encoding includes selecting a second set of the channel indices smaller than a channel index for a first information bit for encoding fixed frozen bits. The encoding includes selecting remaining channel indices for dynamic frozen (PCF) bits having values based on one or more of the information bits. The method includes transmitting the encoded stream of bits.

公开(公告)号：US11057151B2

公开(公告)日：2021-07-06

申请号：US16487050

申请日：2017-12-14

申请人： QUALCOMM Incorporated ,  Yang Yang ,  Jing Jiang ,  Gabi Sarkis ,  Chao Wei ,  Jian Li ,  Changlong Xu ,  Hari Sankar ,  Joseph Binamira Soriaga

发明人： Yang Yang ,  Jing Jiang ,  Gabi Sarkis ,  Chao Wei ,  Jian Li ,  Changlong Xu ,  Hari Sankar ,  Joseph Binamira Soriaga

IPC分类号： H04L1/00 ,  G06N7/00 ,  H03M13/01 ,  H03M13/13

摘要： Methods, systems, and devices for wireless communication are described for mutual information based polar code construction. A wireless device may receive a codeword over a wireless channel, the codeword encoded using a polar code. The wireless device may identify a set of bit locations of the polar code corresponding to information bits of an encoded information bit vector. The set of bit locations may be determined based at least in part on a reliability order of the bit locations of the polar code, and the reliability order may be determined based at least in part on a recursive model that includes at least one mutual information transfer function that is applied at each polarization stage of multiple polarization stages of the polar code. The wireless device may decode the received codeword to obtain the information bit vector at the set of bit locations.

公开(公告)号：US10944517B2

公开(公告)日：2021-03-09

申请号：US16078480

申请日：2016-11-04

申请人： Jian Li ,  Changlong Xu ,  Jilei Hou ,  Neng Wang ,  Chao Wei ,  QUALCOMM Incorporated

发明人： Jian Li ,  Changlong Xu ,  Jilei Hou ,  Neng Wang ,  Chao Wei

IPC分类号： H04L1/18 ,  H03M13/13 ,  H03M13/29 ,  H04L1/00 ,  H04L1/20 ,  H03M13/00 ,  H04W72/04

摘要： For communication utilizing polar codes, a hybrid automatic repeat request algorithm utilizing incremental redundancy (HARQ-IR) may provide increased throughput by including new data, not based on an original transmission, in a HARQ retransmission. The number of retransmitted bits and new information bits in each HARQ retransmission may be controlled in order to manage a tradeoff between increased throughput and a decreased block error rate (BLER).

公开(公告)号：US20200100214A1

公开(公告)日：2020-03-26

申请号：US16467454

申请日：2018-01-24

申请人： Chao WEI ,  Jilei HOU ,  Changlong XU ,  Jian LI ,  Qualcomm Incorporated

发明人： Chao Wei ,  Changlong Xu ,  Jilei Hou ,  Jian Li

IPC分类号： H04W72/00 ,  H04W56/00 ,  H04L1/00 ,  H04L1/18

摘要： Methods, systems, and devices for wireless communication are described. In order to exchange data over a given wireless communication network, a wireless device may first perform a cell acquisition procedure (e.g., to determine cell-specific information such as timing and frequency offsets, bandwidth, control channel formatting, etc.). In some systems, aspects of the timing information may be conveyed with scrambling codes applied to a master information block (MIB). Physical broadcast channel (PBCH) payloads, including MIB transmissions, may be jointly encoded with synchronization signal indices. Bursts of MIB transmissions may thus be decoded without blind decoding while maintaining error protection and low latency that may be necessary to obtain critical system information within the MIB.

公开(公告)号：US20150372803A1

公开(公告)日：2015-12-24

申请号：US14768302

申请日：2013-02-21

申请人： Hai JIANG ,  Yin HUANG ,  Changlong XU ,  Jian LI ,  Yisheng XUE ,  QUALCOMM INCORPORATED

发明人： Hai Jiang ,  Yin Huang ,  Changlong Xu ,  Jian Li ,  Yisheng Xue

IPC分类号： H04L7/00 ,  H04L7/04

CPC分类号： H04L7/0037 ,  H04L7/0062 ,  H04L7/043 ,  H04L7/10

摘要： A method of data-aided timing recovery for Ethernet systems is disclosed. A first device negotiates a pseudorandom number sequence with a second device and receives a data signal from the second device. The first device samples the received data signal to recover a first training sequence. The first device also generates a second training sequence based on the pseudorandom number sequence. The second training sequence is then synchronized with the first training sequence. The synchronized second training sequence is used to align a receive clock signal of the first device with the data signal received from the second device.

摘要翻译： 公开了一种用于以太网系统的数据辅助定时恢复的方法。 第一设备与第二设备协商伪随机数序列，并从第二设备接收数据信号。 第一设备对接收的数据信号进行采样以恢复第一训练序列。 第一设备还基于伪随机数序列生成第二训练序列。 然后将第二训练序列与第一训练序列同步。 同步的第二训练序列用于将第一设备的接收时钟信号与从第二设备接收的数据信号对准。

公开(公告)号：US20110194641A1

公开(公告)日：2011-08-11

申请号：US12678146

申请日：2008-09-12

申请人： Wei Ming Lim ,  Changlong Xu ,  Mituru Tanabe ,  Teruhito Takeda ,  Tomoaki Mizuta

发明人： Wei Ming Lim ,  Changlong Xu ,  Mituru Tanabe ,  Teruhito Takeda ,  Tomoaki Mizuta

IPC分类号： H04L27/00

CPC分类号： H04L27/2602 ,  H03M13/05 ,  H03M13/35 ,  H04L1/0006 ,  H04L1/001

摘要： A method for encoding a bit sequence is described comprising selecting a first coding block bit number and a first coding scheme; sub-dividing the bit sequence into at least one first bit block and a second bit block, wherein each of the at least one first bit block comprises the first coding block bit number of bits and the second bit block comprises less bits than the first coding block bit number; selecting a second coding scheme for the second bit block different from the first coding scheme; and encoding the at least one first bit block using the first coding scheme and encoding the second bit block using the second coding scheme.

摘要翻译： 描述了一种编码比特序列的方法，包括：选择第一编码块比特数和第一编码方案; 将所述比特序列分为至少一个第一比特块和第二比特块，其中所述至少一个第一比特块中的每一个包括所述第一编码块比特位数，并且所述第二比特块包括比所述第一编码 块位数; 选择与第一编码方案不同的第二比特块的第二编码方案; 以及使用所述第一编码方案对所述至少一个第一比特块进行编码，并且使用所述第二编码方案对所述第二比特块进行编码。

公开(公告)号：US20100322129A1

公开(公告)日：2010-12-23

申请号：US12456568

申请日：2009-06-17

申请人： Huaning Niu ,  Yujian Zhang ,  Changlong Xu

发明人： Huaning Niu ,  Yujian Zhang ,  Changlong Xu

IPC分类号： H04H20/71

CPC分类号： H04W4/06 ,  H04L12/189 ,  H04L27/3488

摘要： An embodiment of the present invention provides an apparatus, comprising a transceiver adapted for hierarchical encoding for a Multicast Broadcast Service (MBS) in wireless networks, wherein the hierarchical encoding is provided by superposition coding to provide different levels of protection for data streams.

摘要翻译： 本发明的一个实施例提供了一种装置，包括适用于无线网络中的组播广播服务（MBS）的分层编码的收发器，其中分层编码由叠加编码提供，以便为数据流提供不同级别的保护。

公开(公告)号：US11171739B2

公开(公告)日：2021-11-09

申请号：US16763304

申请日：2018-10-26

申请人： Qualcomm Incorporated ,  Changlong Xu ,  Liangming Wu ,  Jian Li ,  Kai Chen ,  Jing Jiang ,  Gabi Sarkis ,  Hao Xu

发明人： Changlong Xu ,  Liangming Wu ,  Jian Li ,  Kai Chen ,  Jing Jiang ,  Gabi Sarkis ,  Hao Xu

IPC分类号： H04L1/00 ,  H04L1/18

摘要： Methods, systems, and devices for wireless communications are described. An encoder of a wireless device may receive a transport block (TB) for transmission and segment the transport block into a set of multiple, smaller data segments that respectively In correspond to a plurality of code blocks of the TB. The encoder may generate a code block level (CB-level) error detection code (EDC) for a subset of the data segments. The encoder may generate a transport block-level (TB-level) EDC for the TB using the data segments. Each of the code blocks (CBs) may be of the same size and may include one of the data segments. A subset of the CBs may include a data segment from the subset of the data segments and one of the CB-level EDCs. The remaining CBs that are not part of the subset may include a remaining data segments and the TB-level EDC.

公开(公告)号：US11038624B2

公开(公告)日：2021-06-15

申请号：US16764957

申请日：2017-11-17

申请人： Qualcomm Incorporated ,  Kai Chen ,  Changlong Xu ,  Jing Jiang ,  Gabi Sarkis ,  Hao Xu

发明人： Kai Chen ,  Changlong Xu ,  Jing Jiang ,  Gabi Sarkis ,  Hao Xu

IPC分类号： H04L1/00

摘要： A transmitting device may identify a set of bit locations of a polar code for encoding an input vector based at least in part on a reliability order of the bit locations, where the input vector includes a set of payload bits. The transmitting device may map bits of the input vector to respective bit locations of the identified set of bit locations and may apply a masking operation to a subset of bits of the input vector that is mapped to a most reliable subset of the set of bit locations. The transmitting device may perform an encoding operation according to the mapped input vector to generate a codeword for transmission. A receiving device may perform complementary operations to obtain the payload bits of the input vector. Based on the described techniques, a false alarm rate for the receiving device may be suppressed.