Compressed report descriptors for USB devices

• US 7,356,635 B2
• Filed: 09/08/2005
• Issued: 04/08/2008
• Est. Priority Date: 09/24/2004
• Status: Active Grant

• Current Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Original Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Inventors: Woodings, Ryan Winfield, Beard, Paul
• Primary Examiner(s): Myers, Paul R.
• Assistant Examiner(s): Stiglic, Ryan M
• Application Number:
  US11/222,546
• Publication Number:
  US 20060080481A1
• Time in Patent Office: 943 Days
• Field of Search: None
• US Class Current: 710/311
• CPC Class Codes: G06F 13/385 for adaptation of a particular data processing system to different peripheral devices
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and apparatus for creating USB peripheral device report descriptors: A short, compressed, report descriptor is stored in a peripheral device. This short report descriptor is transmitted to a USB wireless bridge and combined with templates stored in the bridge to create a USP report descriptor. Power is saved because less time is required to transmit the short report descriptor than would be required to transmit a full USB report descriptor. Hardware is also saved in the peripheral device since less memory is required to store the short report descriptors as compared to storing a full USB report descriptor.

Claims

1. A method for creating a full sized USB report descriptor for a USB peripheral device comprising:

obtaining a short report descriptor from said peripheral device, said short report descriptor including at least one template indicator; and

combining said short report descriptor with at least one template indicated by said template indicator to create a full-sized USB report descriptor for said device.

2. The method of claim 1, wherein said USB peripheral device is connected to a USB wireless bridge and said template is stored in said USB wireless bridge.

3. The method of claim 2 wherein said short report descriptor is transmitted to said wireless bridge and said short report descriptor is combined with said template in said wireless bridge to create said, full-sized USB report descriptor.

4. The method of claim 1, wherein said short report descriptor is stored in the device in non-volatile memory.

5. The method of claim 1, wherein said template is stored in non-volatile memory in a bridge.

6. The method of claim 1, further comprising saving said short report descriptor in a bridge in non-volatile memory after being received from said peripheral device.

7. The method of claim 3 said recited short report descriptor is a first short report descriptor and said method further comprising sending a second short report descriptor from a second device to said bridge, said second short report descriptor containing the same template indicator as in said first short report descriptor, said second short report descriptor being different from said first short report descriptor.

8. The method of claim 6, further comprising creating the full-sized report descriptor a second time based in part on the short report descriptor stored in non-volatile memory.

9. A wireless USB system comprising:

a wireless USB device adapted to transmit a short report descriptor;

a wireless USB bridge adapted to receive said short report descriptor and to create a full-sized USB report descriptor for said device based in part on said compressed report descriptor; and

a computer adapted to receive said full-sized report descriptor from said wireless USB bridge.

10. The system of claim 9, wherein said wireless USB bridge creates the full-sized report descriptor based in part on a template identified by a template indicator contained within said short report descriptor.

11. The system of claim 9, wherein said short report descriptor is stored in said wireless device in non-volatile memory.

12. The system of claim 10, wherein said template is stored in said wireless bridge.

13. The system of claim 9, wherein said wireless bridge stores the compressed report descriptor in non-volatile memory located within the wireless bridge.

14. The system of claim 11, wherein the wireless bridge creates a second full-sized report descriptor based in part on the short report descriptor stored in said non-volatile memory.