Lei Cao

US Patent:

8098611, Jan 17, 2012

Filed:

Mar 30, 2009

Appl. No.:

12/414329

Inventors:

Jinyun Zhang - Cambridge MA, US
Lei Cao - Oxford MS, US

Assignee:

Mitsubishi Electric Research Laboratories, Inc. - Cambridge MA

International Classification:

H04B 7/14
H04J 1/10
H04J 3/08
H03M 13/00

US Classification:

370315, 370476, 370479, 714759

Abstract:

Source nodes in an International Mobile Telecommunications (IMT)-advanced 4G network transmit data on uplink channels to a relay node and a BS using a channel code. The relay node decodes independently the data received from each source node, and applies network coding to data correctly decoded, and transmits the encoded data to the BS. The BS decodes the encoded data transmitted by the sources nodes and the relay nodes cooperatively via a turbo decoding process. The data from each source node are decoded by soft-input soft-output single user decoders and are decoded, together with the data from the relay node, by a soft-input soft-output multi-user decoder.

US Patent:

20010042202, Nov 15, 2001

Filed:

Mar 28, 2001

Appl. No.:

09/819328

Inventors:

Charles Horvath - Concord MA, US
Lei Cao - Nashua NH, US

International Classification:

H04L009/00

US Classification:

713/154000

Abstract:

A method for dynamically-extending a firewall includes a step of receiving an identifier from a remote system. The identifier is used locally to accept packets of information with matching identifiers, rejecting packets whose identifiers do not match.

US Patent:

20110201060, Aug 18, 2011

Filed:

Feb 14, 2011

Appl. No.:

13/026749

Inventors:

Rajarathnam E. Reddy - Gurnee IL, US
Sanjay R. Chemburkar - Gurnee IL, US
Douglas R. Spaulding - Green Oaks IL, US
Yi Pan - Gurnee IL, US
Lei Cao - Lake Bluff IL, US
Jose A. Restituyo - Gurnee IL, US
Richard Lorenzini - Antioch IL, US
Michael DeMarco - Wadsworth IL, US

Assignee:

Abbott Laboratories - Abbott Park IL

International Classification:

C12P 19/02

US Classification:

435105

Abstract:

This invention pertains to a process for manufacturing scyllo-Inositol. Specifically, the current invention pertains to a process for converting myo-Inositol to scyllo-Inositol using a bioconversion process.

US Patent:

20210034447, Feb 4, 2021

Filed:

Jun 13, 2020

Appl. No.:

16/900909

Inventors:

- Hamilton, BM
Lei Cao - Westford MA, US
Steven Michael Haid - Bolton MA, US
John R. MacLeod - Cambridge MA, US
Angel L. Pagan - Holden MA, US
Nathaniel Horwitch Dailey - Stow MA, US
Wendy J. McNaughton - Hopkinton MA, US
Stephen J. Wark - Shrewsbury MA, US

International Classification:

G06F 11/07
G06F 11/14
G06F 11/16
G06F 11/30
G06F 9/4401

Abstract:

A method and apparatus of performing fault tolerance in a fault tolerant computer system comprising: a primary node having a primary node processor; a secondary node having a secondary node processor, each node further comprising a respective memory; a respective checkpoint shim; each of the primary and secondary node further comprising: a respective non-virtual operating system (OS), the non-virtual OS comprising a respective; network driver; storage driver; and checkpoint engine; the method comprising the steps of: acting upon a request from a client by the respective OS of the primary and the secondary node, comparing the result obtained by the OS of the primary node and the secondary node by the network driver of the primary node for similarity, and if the comparison of indicates similarity less than a predetermined amount, the primary node network driver informs the primary node checkpoint engine to begin a checkpoint process.

US Patent:

20210037092, Feb 4, 2021

Filed:

Jun 13, 2020

Appl. No.:

16/900910

Inventors:

- Hamilton, BM
Lei Cao - Westford MA, US

Assignee:

Stratus Technologies Bermuda, Ltd. - Hamilton

International Classification:

H04L 29/08
G06F 9/46
H04L 12/26

Abstract:

In part, disclosure relates to a method of regulating checkpointing in an active active fault tolerant system. The method includes receiving a request from a client through a network at a primary computer; copying, by the primary computer, the request from the client to a secondary computer; processing the request from the client, using the primary computer, to generate a primary computer result; processing the copy of the request from the client, using the secondary computer, to generate a secondary computer result; comparing the primary computer result and the secondary computer result to obtain a comparison metric; determining whether a minimum checkpoint interval has been met or exceeded; and if the minimum checkpoint interval has not been met or exceeded, delay initiating a checkpoint process from primary computer to secondary computer.

US Patent:

20180336106, Nov 22, 2018

Filed:

May 17, 2017

Appl. No.:

15/597920

Inventors:

LEI CAO - WESTFORD MA, US

International Classification:

G06F 11/14
G06F 3/06
G06F 9/455

Abstract:

A HA computer system is configured to support the operation of an active and a standby virtual machine, and the active virtual machine supports one or more first computer processes and the standby virtual machines supports duplicates of the one or more first computer processes. Each active virtual machine monitors and stores a state of the first computer processes and periodically pauses to only synchronize some of the state of the first computer processes running on the active VM with state associated with the duplicate processes running on the standby VM stored in a first region of virtual memory.

US Patent:

20170364425, Dec 21, 2017

Filed:

Jun 19, 2017

Appl. No.:

15/626374

Inventors:

- Hamilton, BM
Lei Cao - Westford MA, US
Aaron Tyrone Smith - Sudbury MA, US

Assignee:

STRATUS TECHNOLOGIES BERMUDA LTD. - HAMILTON

International Classification:

G06F 11/20
G06F 9/455
G06F 11/14

Abstract:

A checkpointing method in a network device fault tolerant system using virtual machines. In one embodiment, the network device has an input port, an output port, an active virtual machine and a standby virtual machine, a network application on the active virtual machine which manipulates data present on the input port and transmits the manipulated data from the output port; a checkpoint engine on the active virtual machine; and an interface agent, on the active virtual machine, having callable functions to move data from the input port to the output port. The method includes the steps of determining, by the checkpoint engine, that a checkpoint is required; requesting by the checkpoint engine that the interface agent quiescent itself; returning, by the interface agent to the network application, an indicator that no packets are available regardless of whether or not packets are arriving at the input port.