公开(公告)号：US10827556B2

公开(公告)日：2020-11-03

申请号：US16453532

申请日：2019-06-26

Applicant: QUALCOMM Incorporated

Inventor： Peter Pui Lok Ang ,  Tingfang Ji ,  Joseph Patrick Burke ,  Joseph Binamira Soriaga ,  Stephen Jay Shellhammer ,  Krishna Kiran Mukkavilli ,  John Edward Smee

IPC: G08C17/00 ,  H04W76/28 ,  H04W52/02 ,  H04W88/06 ,  H04W76/16

Abstract: Certain aspects of the present disclosure relate to techniques and apparatus for efficient support of connected discontinuous reception (C-DRX) by using a wireless device (e.g., a user equipment (UE)) with a second receiver. A wireless device with two receivers may place one receiver in a low power mode and take the receiver out of the low power mode in response to a signal received from a serving base station (BS) of the wireless device. A BS may direct a wireless device to enter a low power DRX (LP-DRX) mode or enhanced DRX mode having longer low power cycles than a non-enhanced DRX mode, and the wireless device may place a primary receiver in a low power mode in response to the directive from the BS. Other aspects, embodiments, and features are also claimed and disclosed.

公开(公告)号：US20190273647A1

公开(公告)日：2019-09-05

申请号：US16272643

申请日：2019-02-11

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Bin Tian

IPC: H04L27/26 ,  H04L27/233 ,  H04L27/20 ,  H04W52/02

Abstract: Methods, systems, and devices for wireless communication are described. A transmitting device may transmit a wakeup message to another device. The wakeup message may be transmitted using a transmit diversity scheme in accordance with aspects of the present disclosure. The transmit diversity may, for example, include a cyclic shift diversity scheme, a phase rotation scheme, a symbol generation scheme, or combinations thereof. The transmit diversity may in some cases improve a communication range of the wakeup message or otherwise benefit the wireless communications system.

公开(公告)号：US09955333B2

公开(公告)日：2018-04-24

申请号：US14673628

申请日：2015-03-30

Applicant: QUALCOMM Incorporated

Inventor： Olivier Jean Benoit ,  Stephen Jay Shellhammer ,  Rahul Malik

IPC: H04W8/00 ,  H04W52/02 ,  H04W68/00 ,  H04W12/04 ,  H04W12/06 ,  H04W68/02 ,  H04W12/10 ,  H04W84/12 ,  H04W76/02 ,  H04L29/06 ,  H04W88/06

CPC classification number: H04W8/005 ,  H04L63/123 ,  H04W12/04 ,  H04W12/06 ,  H04W12/10 ,  H04W52/0209 ,  H04W52/0216 ,  H04W52/0219 ,  H04W52/0225 ,  H04W52/0229 ,  H04W56/00 ,  H04W56/001 ,  H04W68/005 ,  H04W68/02 ,  H04W76/14 ,  H04W76/27 ,  H04W84/12 ,  H04W88/06 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/164

Abstract: Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to ultra low power paging frames for wake up and discovery. One example apparatus for wireless communications generally includes at least one interface configured to obtain a frame via a first radio and a second radio, wherein the interface receives a frame from another apparatus via the second radio while the first radio is in a first power state; and a processing system configured to take one or more actions based on a command field included in the frame. A second example apparatus for wireless communications generally includes at least one interface configured to obtain a frame via a first radio and a second radio, wherein the interface receives a frame from another apparatus via the second radio while the first radio is in a first power state; and a processing system configured to take one or more actions based on whether or not an authentication code included in the frame matches a local authentication code.

公开(公告)号：US09585091B2

公开(公告)日：2017-02-28

申请号：US13831131

申请日：2013-03-14

Applicant: Qualcomm Incorporated

Inventor： Amin Jafarian ,  Simone Merlin ,  Stephen Jay Shellhammer ,  Vincent Knowles Jones, IV ,  Alfred Asterjadhi ,  Hemanth Sampath

IPC: H04W52/02 ,  H04W74/08 ,  H04W74/00

CPC classification number: H04W52/02 ,  H04W52/0235 ,  H04W52/028 ,  H04W52/0293 ,  H04W74/00 ,  H04W74/0816 ,  H04W74/085 ,  Y02D70/142

Abstract: Systems, methods, and devices for wireless communication. In one aspect an apparatus for wirelessly communicating with a wireless station is provided. The apparatus comprises a first transceiver configured to receive a backoff signal from the wireless station during a first time period, the backoff signal configured to indicate a second time period. The apparatus further comprises a processor operationally coupled to the first transceiver and configured to refrain the first transceiver from transmitting a wireless signal during the second time period.

Abstract translation: 用于无线通信的系统，方法和设备。 在一个方面，提供了一种用于与无线站无线通信的装置。 该装置包括第一收发机，其被配置为在第一时间段期间从无线站接收回退信号，该退避信号被配置为指示第二时间段。 该装置还包括处理器，其操作地耦合到第一收发器并且被配置为在第二时间段期间禁止第一收发器发送无线信号。

公开(公告)号：US09154156B2

公开(公告)日：2015-10-06

申请号：US14335357

申请日：2014-07-18

Applicant: QUALCOMM Incorporated

Inventor： Xiao Feng Wang ,  Stephen Jay Shellhammer

IPC: H03M5/16 ,  H04L25/49 ,  H03M7/46 ,  H03M5/14

CPC classification number: H03M5/16 ,  H03M5/145 ,  H03M7/46 ,  H04L25/03057 ,  H04L25/49 ,  H04L25/4923

Abstract: A method of line coding is disclosed that limits error propagation in a decision feedback equalizer (DFE) of a receiving device. A communications device receives a set of bits to be transmitted over a channel and divides the set of bits into a plurality of blocks based, at least in part, on a line coding scheme. The device then encodes each of the blocks of bits into a corresponding block of symbols based on the line coding scheme. Specifically, the line coding scheme has a non-uniform coding efficiency, wherein a first bit or a last bit of each block of bits is mapped to a single data symbol. For some embodiments, the line coding scheme may be a ternary line coding scheme that maps a block of 3k+1 bits to a corresponding block of 2k+1 symbols, where k is an integer greater than 1.

Abstract translation: 公开了一种限制接收设备的判决反馈均衡器（DFE）中的误差传播的线路编码方法。 通信设备接收要通过信道发送的一组比特，并且至少部分地基于线路编码方案将比特集合分成多个块。 然后，该设备基于线路编码方案将每个比特块块编码成相应的符号块。 具体地，线路编码方案具有不均匀的编码效率，其中每个比特块的第一比特或最后一比特被映射到单个数据符号。 对于一些实施例，线路编码方案可以是将3k + 1比特的块映射到2k + 1个符号的对应块的三元线编码方案，其中k是大于1的整数。

公开(公告)号：US20150244394A1

公开(公告)日：2015-08-27

申请号：US14335357

申请日：2014-07-18

Applicant: QUALCOMM Incorporated

Inventor： Xiao Feng Wang ,  Stephen Jay Shellhammer

IPC: H03M5/16

CPC classification number: H03M5/16 ,  H03M5/145 ,  H03M7/46 ,  H04L25/03057 ,  H04L25/49 ,  H04L25/4923

Abstract: A method of line coding is disclosed that limits error propagation in a decision feedback equalizer (DFE) of a receiving device. A communications device receives a set of bits to be transmitted over a channel and divides the set of bits into a plurality of blocks based, at least in part, on a line coding scheme. The device then encodes each of the blocks of bits into a corresponding block of symbols based on the line coding scheme. Specifically, the line coding scheme has a non-uniform coding efficiency, wherein a first bit or a last bit of each block of bits is mapped to a single data symbol. For some embodiments, the line coding scheme may be a ternary line coding scheme that maps a block of 3k+1 bits to a corresponding block of 2k+1 symbols, where k is an integer greater than 1.

Abstract translation: 公开了一种限制接收设备的判决反馈均衡器（DFE）中的误差传播的线路编码方法。 通信设备接收要通过信道发送的一组比特，并且至少部分地基于线路编码方案将比特集合分成多个块。 然后，该设备基于线路编码方案将每个比特块块编码成相应的符号块。 具体地，线路编码方案具有不均匀的编码效率，其中每个比特块的第一比特或最后一比特被映射到单个数据符号。 对于一些实施例，线路编码方案可以是将3k + 1比特的块映射到2k + 1个符号的对应块的三元线编码方案，其中k是大于1的整数。

公开(公告)号：US20150223047A1

公开(公告)日：2015-08-06

申请号：US14611932

申请日：2015-02-02

Applicant: QUALCOMM Incorporated

Inventor： Santosh Paul Abraham ,  Alireza Raissinia ,  Stephen Jay Shellhammer ,  George Cherian

IPC: H04W8/00

CPC classification number: H04W8/005 ,  H04W48/16 ,  H04W52/0209 ,  H04W52/0216 ,  H04W52/0229 ,  H04W88/06 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/23

Abstract: A method includes transmitting, from an electronic device in a neighbor awareness network (NAN) via a first wireless protocol, a wake up message indicating discovery information associated with a second wireless protocol. The method further includes communicating information via the NAN using the second wireless protocol after transmitting the wake up message.

Abstract translation: 一种方法包括经由第一无线协议从邻居感知网络（NAN）中的电子设备发送指示与第二无线协议相关联的发现信息的唤醒消息。 该方法还包括在发送唤醒消息之后经由NAN使用第二无线协议传送信息。

公开(公告)号：US12126550B2

公开(公告)日：2024-10-22

申请号：US18327216

申请日：2023-06-01

Applicant: QUALCOMM Incorporated

Inventor： George Cherian ,  Alfred Asterjadhi ,  Abhishek Pramod Patil ,  Sameer Vermani ,  Bin Tian ,  Stephen Jay Shellhammer ,  Lochan Verma ,  Lin Yang ,  Jialing Li Chen

IPC: H04L5/00 ,  H04W16/14 ,  H04W72/044 ,  H04W72/27 ,  H04W74/0808 ,  H04W84/12 ,  H04W88/08

CPC classification number: H04L5/0035 ,  H04L5/0007 ,  H04L5/0037 ,  H04W16/14 ,  H04W72/044 ,  H04W72/27 ,  H04W74/0808 ,  H04W84/12 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communications are described. An access point (AP) may transmit, to a second AP and during a first portion of a transmission opportunity (TxOP), a request to participate in a multi-user (MU) transmission. The AP may receive, from the second AP and during the first portion of the TxOP, an indication of intent to participate in the MU transmission during the second portion of the TxOP, the indication of intent including a resource request of the second AP for participation in the MU transmission. The AP may transmit, during an initial period of the second portion of the TxOP, a trigger signal to the second AP indicating a set of one or more resources for the second AP during the MU transmission. The AP may participate, in conjunction with the second AP and during the second portion of the TxOP, in the MU transmission.

公开(公告)号：US11894964B2

公开(公告)日：2024-02-06

申请号：US18065523

申请日：2022-12-13

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Bin Tian ,  Alireza Raissinia ,  Youhan Kim

IPC: H04L27/26 ,  H04L5/00 ,  H04B7/0452

CPC classification number: H04L27/2613 ,  H04L5/0023 ,  H04L5/0048 ,  H04L27/2605 ,  H04B7/0452

Abstract: This disclosure provides methods, devices and systems for generating a secure long training field (LTF). In some implementations, the secure LTF may include a randomized bit sequence that is difficult, if not impossible, to replicate by any device other than the transmitting device and the intended receiving device. For example, the transmitting device may use a block cipher or stream cipher to generate a pseudorandom bit sequence and may select a subset of bits of the pseudorandom bit sequence to be mapped to a sequence of modulation symbols representing an LTF symbol of the secure LTF. More specifically, each of the modulation symbols is mapped to a respective one of a number of subcarriers spanning a bandwidth of the secure LTF. The transmitting device may further transmit a physical layer convergence protocol (PLCP) protocol data unit (PPDU) that includes the secure LTF to the receiving device.

公开(公告)号：US11877352B2

公开(公告)日：2024-01-16

申请号：US17237908

申请日：2021-04-22

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxin Zhang ,  Stephen Jay Shellhammer ,  Kapil Rai ,  Jayanand Asok Kumar ,  Vikram Kandukuri ,  Sarin Mathen

IPC: H04W80/02 ,  H04B17/336 ,  H04B17/354 ,  H04B7/0413 ,  H04W84/12

CPC classification number: H04W80/02 ,  H04B17/336 ,  H04B17/354 ,  H04B7/0413 ,  H04W84/12

Abstract: In an aspect, a wireless device is configured to transmit a physical layer protocol data unit on one or more channels, wherein the physical layer protocol data unit includes a first portion and a second portion. The first portion includes a signal length field indicating a duration of a transmission of the physical layer protocol data unit. The second portion includes a plurality of Wi-Fi sensing fields. The wireless device is configured to receive a reflected signal and a leakage signal associated with the physical layer protocol data unit. The reflected signal includes the physical layer protocol data unit reflected off of a target object. The leakage signal is associated with the physical layer protocol data unit.