Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.1259/CHE/2011 A
(19) INDIA
(22) Date of filing of Application :11/04/2011 (43) Publication Date : 21/06/2013
(54) Title of the invention : USB VIRTUALIZATION
(51) International classification :G06F
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
(86) International Application No
:NA
Filing Date
:NA
(87) International Publication No : NA
(61) Patent of Addition to Application Number :NA
Filing Date
:NA
(62) Divisional to Application Number
:NA
Filing Date
:NA
(71)Name of Applicant :
1)INEDA SYSTEMS PVT. LTD
Address of Applicant :8-2-120/115/C, SUDHA ENCLAVE,
ROAD NO.2, BANJARA HILLS, HYDERABAD-500 034.
Andhra Pradesh India
(72)Name of Inventor :
1)KANIGICHERLA, BALAJI
2)VOLETI, SIVA RAGHURAM
3)DOMMETI, SURYA NARAYANA
4)TANDABOINA, KRISHNA MOHAN
5)LOTTI, RAJANI
(57) Abstract :
Described herein are methods and systems for virtualization of a USB device to enable sharing of the USB device among a
plurality of host processors in a multi-processor computing system. A USB virtualization unit for sharing of the USB device
include a per-host register unit, each corresponding to a host processor includes one or more of a host register interface, host data
interface, configuration registers, and host control registers, configured to receive simultaneous requests from one or more host
processors from amongst the plurality of host processors for the USB device. The USB virtualization unit also includes a pre-fetch
direct memory access (DMA) configured to pre-fetch DMA descriptors associated with the requests to store in a buffer. The USB
virtualization unit further includes an endpoint specific switching decision logic (ESL) configured to schedule data access based
on the DMA descriptors from the host processor's local memory corresponding to each request.
No. of Pages : 27 No. of Claims : 14
The Patent Office Journal 21/06/2013 13716