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:
Dec. 30, 2008
Filed:
Jan. 27, 2005
Dae-sik OH, Overland Park, KS (US);
Leo R. Anderson, Jr., Raymoore, MO (US);
Kristin A. Hayne, Overland Park, KS (US);
Tom Steele, Shawnee, KS (US);
Dae-Sik Oh, Overland Park, KS (US);
Leo R. Anderson, Jr., Raymoore, MO (US);
Kristin A. Hayne, Overland Park, KS (US);
Tom Steele, Shawnee, KS (US);
Sprint Spectrum L.P., Overland Park, KS (US);
Abstract
Base station controlled vertical handoff is disclosed. When a hybrid access terminal is operating under a first air interface protocol (e.g., IS-2000), in a mode (e.g., active) in which the terminal does not search for the presence of wireless service under a second air interface protocol (e.g., IS-856), the terminal sends a request to a base station seeking to hand off to a wireless coverage area under the protocol. The base station then determines (e.g., by reference to the PN offset specified in the request) that the target coverage area additionally provides service under the second protocol. Responsively, the base station causes the terminal to transition to a second mode (e.g., dormant) in which the terminal does search for the presence of service under the second protocol. The terminal may thereby discover the presence of service under the second protocol and may hand off to operate under the second protocol.