Extended USB protocol with selective broadcast mechanism

Details Extended USB protocol with selective broadcast mechanism Extended USB protocol with selective broadcast mechanism

2004-08-10

2010-11-09

Hafiz, Tariq R. (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output access regulation

C710S008000, C710S012000, C710S014000, C710S037000, C710S049000, C710S313000, C710S317000, C370S392000, C370S402000

Reexamination Certificate

active

07831748

ABSTRACT:
An extension to the Universal Serial Bus (USB) protocol that utilizes reserved bits in the OHCI Endpoint Descriptors to signal which root hub port(s) should transmit the data. Typically, all ports transmit (broadcast) data. The present invention encodes transmission information that can be used by the hardware to effectively control which port(s) need to be tri-stated. However, by setting, the “on” bits for all the ports, the present invention retains standard USB functionality. Also provided is a method to increase the bandwidth of low speed devices connected to the USB bus by increasing the data payload for such devices.

REFERENCES:
patent: 5623217 (1997-04-01), Britton et al.
patent: 5715405 (1998-02-01), McClear et al.
patent: 5781796 (1998-07-01), Lee
patent: 5784581 (1998-07-01), Hannah
patent: 6182185 (2001-01-01), Stokes
patent: 6272644 (2001-08-01), Urade et al.
patent: 6359951 (2002-03-01), Morriss et al.
patent: 6389029 (2002-05-01), McAlear
patent: 6512817 (2003-01-01), Dale et al.
patent: 6622178 (2003-09-01), Burke et al.
patent: 6732218 (2004-05-01), Overtoom et al.
patent: 6993032 (2006-01-01), Dammann et al.
patent: 6993620 (2006-01-01), Ferguson
patent: 7099980 (2006-08-01), Magnuson et al.
patent: 7242766 (2007-07-01), Lyle
patent: 7284081 (2007-10-01), Siddappa
patent: 7373522 (2008-05-01), Leaming
patent: 7395365 (2008-07-01), Fujita et al.
patent: 7460535 (2008-12-01), Govindaraman
patent: 7502878 (2009-03-01), Wright
patent: 2002/0194514 (2002-12-01), Sanchez
patent: 2003/0056050 (2003-03-01), Moro
patent: 2004/0008684 (2004-01-01), Garney et al.
patent: 2004/0225799 (2004-11-01), Leaming
patent: 2004/0237110 (2004-11-01), Jones, Jr.
patent: 2005/0180388 (2005-08-01), Siddappa
patent: 1 372 081 (2003-12-01), None
patent: 1372081 (2003-12-01), None
patent: 11096112 (1997-04-01), None
Axelson, Jan. “USB Complete,” Second Edtion (2001).
“OpenHCI: Open Host Controller Interface Specification for USB,” Release 1.0a (Sep. 14, 1999).
“Universal Serial Bus Mass Storage Class: UFI Command Specification,” Revision 1.0 (Dec. 14, 1998).
“Universal Serial Bus Specification,” Revision 1.1 (Sep. 23, 1998).
“USB Serial Bus Specification,” Revision 1.1 (Sep. 23, 1998).
Chia, Ian. “USB 2.0 Frequently Asked Questions—USB 2.0 versus USB 1.1.” Everythingusb.com. Jul. 9, 2001. May 10, 2007. Retrieved from http://web.archive.org/web/20011107205048/www.everythingusb.com/usb2/faqb.htm—Reference discloses that USB 2.0 is indeed compatible with USB 1.1.
Lin, Charles C. “What's a Tri-state Buffer?” “Computer Organization.” University of Maryland Department of Computer Science. 2003. May 22, 2008. Retrieved from <http://web.archive.org/web/20031024232826/http://www.cs.umd.edu/class/spring2003/cmsc311/Notes/CompOrg/tristate.htmI>.
Universal Serial Bus Specification,Compaq Computer Corporation, Intel Corporation, Microsoft Corporation, NEC Corporation, 1998, Revision 1.1, 1-311.
OpenHCI, Open Host Controller Interface Specification for USB,Compaq Computer Corporation, Microsoft Corporation, National Semiconductor, 1999, Release 1.0a, 1-146.

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