Auto-tuning reliability protocol in pub-sub RTPS systems

• US 10,439,756 B2
• Filed: 01/04/2018
• Issued: 10/08/2019
• Est. Priority Date: 01/16/2015
• Status: Active Grant

• Current Assignee: Real-Time Innovations, Inc.
• Original Assignee: Real-Time Innovations, Inc.
• Inventors: Martin Carrascosa, Juan Jose, Pardo-Castellote, Gerardo, Yang, Yusheng, Crespo Sanchez, Fernando
• Primary Examiner(s): La, Phong
• Application Number:
  US15/862,364
• Publication Number:
  US 20180131463A1
• Time in Patent Office: 642 Days
• Field of Search: 370466
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0018 based on latency requirement
• CPC Class Codes: H04L 1/187 Details of sliding window management
• CPC Class Codes: H04L 47/25 with rate being modified by the source upon detecting a change of network conditions
• CPC Class Codes: H04L 47/27 Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
• CPC Class Codes: H04L 47/28 in relation to timing considerations
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion

Abstract

Adaptive tuning techniques are provided for data communications in an Object Management Group (OMG) Real-Time Publish Subscribe (RTPS) Protocol operable over a communication network to provide good throughput/latency tradeoff as well as efficient bandwidth utilization. With this invention, latency under high throughput conditions can be reduced several times compared with the latency obtained with traditional non-adaptive approaches.

Claims

1. A method for adaptively auto-tuning data communications over a communication network, comprising:

having an Object Management Group (OMG) Real-Time Publish Subscribe (RTPS) Protocol operable over the communication network with a software application writing samples to an RTPS-Writer, the RTPS-Writer sending the software application written samples encapsulated in an RTPS-DATA message to an RTPS-Reader, a Send Window defined between the RTPS-Writer and RTPS-Reader, a Send Window Size in a number of the RTPS-DATA messages defined between the RTPS-Writer and RTPS-Reader, and a Writing Rate defined for the RTPS-Writer;

having a first auto-tuning method, implemented as a computer software executable by a computer, for dynamically and automatically adjusting the Send Window Size based on a number of RTPS-NACK messages received by the RTPS-Writer, wherein the RTPS-NACK message is defined as a message sent from the RTPS-Reader to the RTPS-Writer indicating that some of the RTPS-DATA messages are missing;

having a second auto-tuning method, implemented as a computer software executable by the computer, for dynamically and automatically adjusting the Sending Rate to avoid that;

(i) a number of samples in the Send Window equals the size of the Send Window, and (ii) the RTPS-Writer blocks or yields CPU.