公开(公告)号：US10356092B2

公开(公告)日：2019-07-16

申请号：US15684854

申请日：2017-08-23

Applicant: Redpine Signals, Inc.

Inventor： Venkat Mattela ,  Duen Jeng Wang

IPC: H04L29/06 ,  H04W12/06

Abstract: An IoT device has a public device identifier and a private device identifier, where the public device identifier is publicly available and the private device identifier is secret but kept in a secure device database as a correspondence. A registration request is sent from the IoT device to an association server in communication with the device database having an association between IoT public identifier and a corresponding IoT private identifier. The association server which receives the registration request responds with a registration acknowledgement containing, in encrypted form, the private device identifier of the original request and, optionally, the public device identifier associated with the registration request. The requesting IoT device receives the association acknowledgement, decrypts the private device identifier, compares it to its own device identifier, and if they match, sends one or more association requests.

公开(公告)号：US20190190765A1

公开(公告)日：2019-06-20

申请号：US16221368

申请日：2018-12-14

Applicant: REDPINE SIGNALS, INC.

Inventor： Partha Sarathy MURALI ,  SuryaNarayana Varma Nallaparaju

IPC: H04L27/26 ,  H04L27/00

CPC classification number: H04L27/2692 ,  H04L27/0014 ,  H04L27/2613 ,  H04L2027/0095

Abstract: A preamble detector for Bluetooth Low Energy includes a receiver for receiving Bluetooth packets and an energy detect controller for enabling power to the receiver during T1 and disabling power to the receiver during T2 in a cyclical fashion until an packet energy increase is detected followed by detection of a preamble. During the T1 interval an AGC process is operative which is also searching for an increase in energy from sample to sample within the same T1 interval, or across adjacent T1 intervals. If an energy increase is detected, a preamble detector is operative to determine if a preamble is present, and if the preamble is not present, the process resumes cycling through T1 and T2.

公开(公告)号：US20190149343A1

公开(公告)日：2019-05-16

申请号：US15811690

申请日：2017-11-14

Applicant: Redpine Signals, Inc.

Inventor： Partha Sarathy Murali ,  Ajay MANTHA ,  Nagaraja Reddy ANAKALA ,  Subba Reddy KALLAM ,  Venkat MATTELA

IPC: H04L12/12

Abstract: A mesh receiver has a wakeup receiver for reception of a wakeup sequence formed by keyed RF or a sequence of wireless packets and gaps, a transmitter forming low speed RF wakeup sequence to other mesh stations, a mesh receiver for reception of high speed WLAN packets, the transmitter sending a wireless ACK packet in response to a wakeup sequence, the mesh receiver thereafter receiving wireless packets from a remote station, the mesh transmitter sending an ACK, the mesh station thereafter identifying a next hop station, and sending a wakeup sequence to that station, after receipt of an ACK, sending the data, the mesh receiver and mesh transmitter thereafter going to sleep.

公开(公告)号：US10292104B2

公开(公告)日：2019-05-14

申请号：US15682541

申请日：2017-08-21

Applicant: Redpine Signals, Inc.

Inventor： Partha Sarathy Murali

IPC: G08C17/00 ,  H04W52/02 ,  H04L1/00

Abstract: A wireless receiver has a preamble detection apparatus and method which waits until the expected arrival of a beacon frame, after which power is cyclically applied during a preamble detection interval and a sleep interval until a preamble is detected. The preamble detector has a first mode with a longer preamble detection interval and a second mode with a shorter preamble detection interval. During the preamble detection interval, power is applied to receiver components, and during the sleep interval, power is not applied. The duration of the preamble detection interval is equal to a preamble sensing interval, and if a preamble is detected, power remains applied to a preamble processor for a preamble processing interval. The duration of the sleep interval is the duration of a long preamble less the sum of two times the preamble detection interval plus the preamble processing interval. Phase lock loop (PLL) power is applied a PLL settling time prior to and during the preamble detection interval.

公开(公告)号：US09478859B1

公开(公告)日：2016-10-25

申请号：US14176127

申请日：2014-02-09

Applicant: Deepu Vasudevan Nair ,  Varun Ramchandani ,  Partha Sarathy Murali ,  Suresh Kumar Vagvala

Inventor： Deepu Vasudevan Nair ,  Varun Ramchandani ,  Partha Sarathy Murali ,  Suresh Kumar Vagvala

IPC: H01Q1/24 ,  H01Q5/00 ,  H01Q1/48

CPC classification number: H01Q1/38 ,  H01Q1/2291 ,  H01Q1/243 ,  H01Q1/36 ,  H01Q1/48 ,  H01Q5/378

Abstract: A printed circuit tri-band antenna has a feedline region and a radiating structure region which provides RF emissions in a lowband (LB) RF frequency, a lower highband (HB-L) frequency, and a upper highband (HB-U) frequency. The feedline region is formed of conductors on an upper plane, the conductors including a feedline which is edge coupled to left and right ground structures. The feedline couples directly to a HB-U radiating structure, and includes a stub. The HB-U structure and stub also provide edge coupling through a gap for coupling RF into a combined HB-L and LB radiation structure, which provides frequency-dependent paths for radiating RF energy at the HB-L and LB frequencies. The antenna is preferably used with 2.35 Ghz LB, 5.07 GHz HB-L, and 5.57 Ghz HB-H.

Abstract translation: 印刷电路三频天线具有馈线区域和在低频带（LB）RF频率，较低高频带（HB-L）频率和高高频（HB-U）频率）中提供RF发射的辐射结构区域。 馈线区域由上平面上的导体形成，导体包括与左和右地面结构边缘连接的馈线。 馈线直接耦合到HB-U辐射结构，并包括一个短截线。 HB-U结构和短截线还通过用于将RF耦合到组合的HB-L和LB辐射结构的间隙提供边缘耦合，其提供用于在HB-L和LB频率处辐射RF能量的频率相关路径。 该天线优选与2.35Ghz LB，5.07GHz HB-L和5.57Ghz HB-H一起使用。

公开(公告)号：US09477292B1

公开(公告)日：2016-10-25

申请号：US13783275

申请日：2013-03-02

Applicant: Partha Sarathy Murali

Inventor： Partha Sarathy Murali

IPC: G06F1/32

CPC classification number: G06F1/3209 ,  G06F1/3203 ,  G06F1/3243 ,  G06F1/3296 ,  G06F9/4418 ,  H04W52/0229 ,  H04W52/0235 ,  H04W52/0261 ,  H04W84/12 ,  Y02D10/152 ,  Y02D70/142 ,  Y02D70/166

Abstract: A wake-up processor for a communications processor has a receive signal amplifier for amplifying the signal level of received RF which has been transmitted as wireless local area network WLAN packets, an amplitude detector for indicating the envelope of the RF energy in the packets, a threshold detector which thresholds the detected RF envelope, and a correlator which compares the detected and thresholded RF envelope with a private pseudo-random number to determine the level of correlation between the received value and the private value. When the correlation exceeds a required threshold, a wake-up signal is asserted which is used to bring a WLAN processor into an active state for processing of subsequently sent packets.

Abstract translation: 用于通信处理器的唤醒处理器具有用于放大已经作为无线局域网WLAN分组发送的接收RF的信号电平的接收信号放大器，用于指示分组中的RF能量的包络的幅度检测器， 阈值检测器，其阈值检测到的RF包络;以及相关器，其将检测到的和阈值的RF包络与私有伪随机数进行比较，以确定接收的值和私有值之间的相关性水平。 当相关性超过所需阈值时，唤醒信号用于使WLAN处理器进入活动状态以处理随后发送的分组。

公开(公告)号：US08937971B1

公开(公告)日：2015-01-20

申请号：US13284891

申请日：2011-10-29

Applicant: Mohan Vellanki

Inventor： Mohan Vellanki

IPC: H04J3/00

CPC classification number: H04W28/0289 ,  H04W24/02 ,  H04W84/12 ,  H04W88/04 ,  H04W88/06

Abstract: A dual mode wireless device operations in a client mode and observes network congestion conditions. When the network congestion exceeds a threshold level, the dual mode wireless device changes to an access point mode and advertises itself to other clients, thereby reducing the network congestion level.

Abstract translation: 双模式无线设备在客户端模式下运行并观察网络拥塞状况。 当网络拥塞超过阈值时，双模无线设备切换到接入点模式，并将其自身通告给其他客户端，从而降低网络拥塞等级。

公开(公告)号：US08879527B1

公开(公告)日：2014-11-04

申请号：US13278436

申请日：2011-10-21

Applicant: Narasimhan Venkatesh

Inventor： Narasimhan Venkatesh

IPC: H04W4/00

CPC classification number: H04W4/00 ,  H04W28/16 ,  H04W72/00 ,  H04W84/12

Abstract: A channel access processor for an access point operates in a frequency spectrum which is divided into master channels, each master channel further having a plurality of sub-channels, each sub-channel capable of supporting wireless LAN communications independently from any other said sub-channel of the master channel. Each master channel is thereby associated with a plurality of sub-channels, and the sub-channels each have an associated bandpass filter and mixer frequency specific to that sub-channel, thereby allowing a plurality of independent wireless communications sessions to simultaneously take place over the multiple sub-channels of the master channel of the access point.

Abstract translation: 用于接入点的信道接入处理器在被分成主信道的频谱中操作，每个主信道还具有多个子信道，每个子信道能够独立于任何其它所述子信道支持无线LAN通信 的主频道。 因此，每个主信道与多个子信道相关联，并且子信道各自具有相关联的带通滤波器和该子信道特有的混频器频率，从而允许多个独立的无线通信会话同时发生在 接入点主信道的多个子信道。

公开(公告)号：US08446996B1

公开(公告)日：2013-05-21

申请号：US13286953

申请日：2011-11-01

Applicant: Karthik Viadyanathan ,  Partha Sarathy Murali

Inventor： Karthik Viadyanathan ,  Partha Sarathy Murali

IPC: H04L27/08

CPC classification number: H04L27/2647 ,  H04L27/2613

Abstract: A gain controller for a wireless communication system sets the receiver gain during the initial time duration of a preamble, and for each subsequent symbol computes a new gain value, which is applied at the end of each symbol. An analog to digital converter resolution controller sets the resolution of the ADC to a high resolution during a preamble interval and a first symbol interval, and to a comparatively lower resolution thereafter until the end of the frame. When a new zone is entered, the first symbol of the new zone is sampled at a higher resolution than the subsequent symbols.

Abstract translation: 用于无线通信系统的增益控制器在前导码的初始持续时间期间设置接收机增益，并且对于每个后续符号计算在每个符号的末尾应用的新的增益值。 模数转换器分辨率控制器在前导码间隔和第一符号间隔期间将ADC的分辨率设置为高分辨率，并且之后到相对较低的分辨率直到帧结束。 当输入新区域时，新区域的第一个符号以比后续符号更高的分辨率进行采样。

公开(公告)号：US08073085B1

公开(公告)日：2011-12-06

申请号：US11825832

申请日：2007-07-07

Applicant: Karthik Vaidyanathan ,  Partha Sarathy Murali

Inventor： Karthik Vaidyanathan ,  Partha Sarathy Murali

IPC: H04L27/08

CPC classification number: H04L27/2647 ,  H04L27/2613

Abstract: A gain controller for a wireless communication system sets the receiver gain during the initial time duration of a preamble, and for each subsequent symbol computes a new gain value, which is applied at the end of each symbol. An analog to digital converter resolution controller sets the resolution of the ADC to a high resolution during a preamble interval and a first symbol interval, and to a comparatively lower resolution thereafter until the end of the frame. When a new zone is entered, the first symbol of the new zone is sampled at a higher resolution than the subsequent symbols.

Abstract translation: 用于无线通信系统的增益控制器在前导码的初始持续时间期间设置接收机增益，并且对于每个后续符号计算在每个符号的末尾应用的新的增益值。 模数转换器分辨率控制器在前导码间隔和第一符号间隔期间将ADC的分辨率设置为高分辨率，并且之后到相对较低的分辨率直到帧结束。 当输入新区域时，新区域的第一个符号以比后续符号更高的分辨率进行采样。