The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 2011
Filed:
May. 30, 2008
Hui Guo, Santa Clara, CA (US);
Venkatachary Srinivasan, Sunnyvale, CA (US);
Surendra Sadanand Rajam, Sunnyvale, CA (US);
Zhaowei Charlie Jiang, Palo Alto, CA (US);
Min Zhou, Palo Alto, CA (US);
Hui Guo, Santa Clara, CA (US);
Venkatachary Srinivasan, Sunnyvale, CA (US);
Surendra Sadanand Rajam, Sunnyvale, CA (US);
Zhaowei Charlie Jiang, Palo Alto, CA (US);
Min Zhou, Palo Alto, CA (US);
Yahoo! Inc., Sunnyvale, CA (US);
Abstract
Embodiments of the invention are directed to determining a universal device identifier (UDID) for a client device, based on multiple service-dependent identifiers (SDIDs) used by client applications, websites, or other services to identify the client device, SDID types are prioritized with pre-assigned weights. A received SDID causes a single database read to access all other SDIDs, and any existing UDID(s) associated with the client device. A final UDID is created or selected based on the SDID weights. The database is updated in a sequence that enables self recovery of a prior UDID in case of database error during update. First, any non-selected UDID records are updated with the final UDID. Next, lower weighted SDID records are updated. The final UDID record is updated. The highest weighted SDID record is updated last, to preserve the prior UDID as long as possible in case of update error, which aborts the remaining update.