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:
Mar. 23, 2010
Filed:
Sep. 02, 2004
Thunyachate Ekvetchavit, San Diego, CA (US);
Ravi Govindarajula, San Diego, CA (US);
Thunyachate Ekvetchavit, San Diego, CA (US);
Ravi Govindarajula, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
For coverage determination and system switching, a terminal obtains pilot strength estimates for base stations in first and second wireless communication systems (e.g., packet data system and voice/data system) and received signal quality estimates for at least one serving base station in the first system. The terminal derives various metrics based on the received signal quality estimates and pilot strength estimates. The terminal may perform handoff to the second system if weak coverage is detected for the first system, a received signal quality metric (Q) for the first system is below a Qthreshold, and a pilot strength metric (V) for the second system exceeds a Vthreshold. The terminal may perform handoff to the first system if good coverage is detected for this system, metric Q exceeds a Qthreshold, or a maximum pilot strength metric (M) for the first system exceeds a Mthreshold.