US 8,078,805 B1Granted

Method and system for communicating with a universal serial bus device

AssigneeWisair Ltd.

InventorsPavel Smirnov, Haim Kupershmidt, Stanislav Cherny, Daniel Halperin, Gadi Shor

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Abstract

A caching filter driver which is adapted for communicating with a universal serial bus (USB) mass storage device, the caching filter driver is adapted to: (a) receive a first reading request for a first size data from a USB mass storage driver; (b) determine if requested data which is requested in the first reading request is included in a prefetched read data cache; (c) issue a second reading request for a second size data to the USB mass storage device; and store the second size data in the prefetched read data cache, if the requested data is not included in the prefetched read data cache; and to (d) provide the requested data from the prefetched read data cache; wherein the second size is larger than the first size and the second size data includes the first size data; wherein the caching filter driver resides below the USB mass storage driver.

Claims7

Dependent claims

A method for communicating with a universal serial bus (USB) mass storage device, the method comprises:

receiving, by a caching filter driver and from a USB mass storage device driver, a first reading request for a first size data from a USB mass storage driver;
wherein the caching filter driver resides below the USB mass storage driver;
determining, by the caching filter driver, if requested data which is requested in the first reading request is comprised in a prefetched read data cache;
issuing by the caching filter driver a second reading request for a second size data to the USB mass storage device over a wireless channel;
receiving the second size data from the USB mass storage device over the wireless channel;
storing the second size data in the prefetched read data cache, if the requested data is not comprised in the prefetched read data cache;
providing by the caching filter driver and to the USB mass storage device driver, the requested data from the prefetched read data cache;
wherein the second size is larger than the first size and the second size data comprises the first size data;
and receiving by the caching filter driver an error message which indicates that the data transfer of the second size data could not be completed;
and issuing the first reading request by the caching filter driver.

7 more elements

A caching filter driver which is adapted for communicating with a universal serial bus (USB) mass storage device, the caching filter driver is adapted to:

receive from a USB mass storage device driver a first reading request for a first size data from a USB mass storage driver;
determine if requested data which is requested in the first reading request is comprised in a prefetched read data cache;
issue over a wireless channel a second reading request for a second size data to the USB mass storage device and store the second size data in the prefetched read data cache, if the requested data is not comprised in the prefetched read data cache;
receive over the wireless channel the second size data from the USB mass storage device over the wireless channel;
and to
provide the requested data from the prefetched read data cache;
wherein the second size is larger than the first size and the second size data comprises the first size data;
wherein the caching filter driver resides below the USB mass storage driver;
wherein the caching filter driver is further adapted to receive an error message which indicates that the data transfer of the second size data could not be completed;
and issue the first reading request by the caching filter driver.

7 more elements

Dependencies are inferred from the claim text.