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：US20190187745A1

公开(公告)日：2019-06-20

申请号：US16222858

申请日：2018-12-17

Applicant: Redpine Signals, Inc.

Inventor： Partha Sarathy MURALI ,  Nagaraja Reddy ANAKALA

IPC: G06F1/10 ,  H03K3/03 ,  H03B5/20 ,  H03B5/32 ,  G06F1/06

CPC classification number: G06F1/10 ,  G06F1/06 ,  H03B5/02 ,  H03B5/20 ,  H03B5/32 ,  H03K3/0315

Abstract: A periodic output generator has a first clock source coupled to a first counter and a second clock source with a frequency greater than the first clock source, the second clock source coupled to a second counter, the first clock source operating continuously, the second clock source enabled when the first clock source reaches a count C1. The second clock source generates an output when a count C2 is reached, and the counters are reset and the process repeats. In another example, a timestamp generator has a high speed clock and a real time clock operative on a low speed clock. The timestamp generator receives an external event, turns on the high speed clock generator and counts high speed clock cycles C until the arrival of the next time stamp, and computes an event timestamp as the next timestamp less c/f, less the startup time of the high speed clock.