A study on universal serial bus latency in a real-time control system

Author

Ramadoss, Lalitha ; Hung, John Y.

Author_Institution

Electr. & Comput. Eng. Dept., Auburn Univ., Auburn, AL

fYear

2008

fDate

10-13 Nov. 2008

Firstpage

67

Lastpage

72

Abstract

In real-time operation of a computer system, the programs for the processing of input data are constantly operational so that the results will be available within predetermined periods of time. Universal Serial Bus has become an industry standard for attaching peripheral devices to the computer. This paper presents an overview of USB, measures the latencies caused by USB and USB hub and compares their latencies to determine whether USB hub adds overhead to USB. Experimental evaluation shows that USB is a good interface for soft real-time systems that can tolerate delays in the order of few milliseconds. It also provides insight needed for building real-time architectures that depend on USB to collect sensor data.

Keywords

control engineering computing; peripheral interfaces; real-time systems; system buses; computer system; peripheral device; real-time computer system operation; real-time control system; universal serial bus; Aircraft manufacture; Buildings; Computer peripherals; Control systems; Delay; Joining processes; Operating systems; Real time systems; Temperature sensors; Universal Serial Bus; Real-Time systems; USB hub; Universal Serial Bus; determinism; latency;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, 2008. IECON 2008. 34th Annual Conference of IEEE

Conference_Location

Orlando, FL

ISSN

1553-572X

Print_ISBN

978-1-4244-1767-4

Electronic_ISBN

1553-572X

Type

conf

DOI

10.1109/IECON.2008.4757930

Filename

4757930