公开(公告)号：US11307779B2

公开(公告)日：2022-04-19

申请号：US16992098

申请日：2020-08-13

Applicant: Redpine Signals, Inc.

Inventor： Subba Reddy Kallam ,  Partha Sarathy Murali ,  Venkata Siva Prasad Pulagam ,  Anusha Biyyani ,  Venkatesh Vinjamuri ,  Shahabuddin Mohammed ,  Rahul Kumar Gurram ,  Akhil Soni

IPC: G06F3/06 ,  G06F12/06

Abstract: The present invention is an controller for dynamically allocating RAM between powersave code copied from ROM and transient RAM memory used for storing packets. When the utilization of the transient RAM memory is low, code segments are copied from ROM and executed from RAM using a RAM pointer table which is updated after the code segments are copied over from ROM, and when the utilization of the transient RAM memory is high, code segments are deallocated from RAM and the pointer table is updated to point to the corresponding location in flash ROM.

公开(公告)号：US11032766B2

公开(公告)日：2021-06-08

申请号：US16442446

申请日：2019-06-14

Applicant: Redpine Signals, Inc.

Inventor： Partha Sarathy Murali ,  Subba Reddy Kallam

IPC: H04W52/02 ,  H04W52/24 ,  H04B17/318 ,  H04W4/80 ,  H04L9/08 ,  H04W84/20 ,  H04R1/10 ,  H04R5/033 ,  G10L19/02

Abstract: A power saving wire-free earpiece has a Bluetooth transceiver and a Bluetooth Low Energy (BLE) transceiver. A stream of audio from a remote source is separated into a local audio stream and a stream sent to the BLE transceiver for a remote earpiece. The earpiece is operative in a first and second mode, the first mode enabling the BT transceiver and BLE transceiver, the second mode enabling only the BLE transceiver for receiving remote streams of data. The first and second mode alternate so that the local and remote earpiece have substantially uniform current requirements.

公开(公告)号：US10425895B2

公开(公告)日：2019-09-24

申请号：US16221561

申请日：2018-12-16

Applicant: Redpine Signals, Inc.

Inventor： Partha Sarathy Murali ,  SuryaNarayana Varma Nallajaraju

IPC: H04W52/02 ,  H04W4/80

Abstract: A preamble detector for a Bluetooth Long Range includes a receiver for forming baseband samples from Bluetooth packets and a preamble detect controller for enabling and disabling power to the receiver. Where the preamble duration is Tcyc, the preamble detector turns on for a preamble detect time T1 and turns off for a duration T2, where T2=Tcyc−2*T1. A series of hierarchical decisions is made on sequentially increasing intervals of time based on an accumulated correlation result of correlating the baseband samples against a SYNC sequence to power the receiver back down before the end of the T1 period when the accumulated correlation result is below a threshold and continues to a subsequent correlation interval when the accumulated correlation result is above a threshold, where the threshold is established to have at least a 20% false alarm rate for preamble detection.

公开(公告)号：USD856984S1

公开(公告)日：2019-08-20

申请号：US29616310

申请日：2017-09-05

Applicant: Redpine Signals, Inc.

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

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：US20190191372A1

公开(公告)日：2019-06-20

申请号：US15845813

申请日：2017-12-18

Applicant: Redpine Signals, Inc.

Inventor： Partha Sarathy Murali ,  Nagaraja Reddy Anakala ,  Ajay Mantha

IPC: H04W52/02 ,  H04L27/06

CPC classification number: H04W52/0229 ,  H04L27/06 ,  H04W4/80 ,  H04W52/0216 ,  H04W84/12 ,  H04W84/18

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：US11288072B2

公开(公告)日：2022-03-29

申请号：US16945936

申请日：2020-08-03

Applicant: Redpine Signals, Inc.

Inventor： Subba Reddy Kallam ,  Partha Sarathy Murali ,  Venkat Mattela ,  Venkata Siva Prasad Pulagam

IPC: G06F9/38 ,  G06F9/52 ,  G06F9/30

Abstract: A multi-thread processor has a canonical thread map register which outputs a sequence of thread_id values indicating a current thread for execution. The thread map register is programmable to provide granularity of number of cycles of the canonical sequence assigned to each thread. In one example of the invention, the thread map register has repeating thread identifiers in a sequential or non-sequential manner to overcome memory latency and avoid thread stalls. In another example of the invention, separate interrupt tasks are placed on each thread to reduce interrupt processing latency.