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:
Feb. 10, 2009
Filed:
Feb. 04, 2004
Louay Jalloul, Palatine, IL (US);
Keith A. Tenbrook, Cary, IL (US);
Yuda Yehuda Luz, Buffalo Grove, IL (US);
Jiangnan (Jason) Chen, Darien, IL (US);
Ron Rotstein, Arlington Heights, IL (US);
Louay Jalloul, Palatine, IL (US);
Keith A. Tenbrook, Cary, IL (US);
Yuda Yehuda Luz, Buffalo Grove, IL (US);
Jiangnan (Jason) Chen, Darien, IL (US);
Ron Rotstein, Arlington Heights, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A method and apparatus provide for soft handoff operation of at least a first signal transmitted according to a first communication standard (IS-95B) and a second signal transmitted according to a second communication standard (IS-95C). A mobile station () initially receives the first signal, detects presence of a pilot signal, measures pilot signal strength, transmits a pilot strength measurement message, fails to receive a handoff direction message after transmitting the pilot strength measurement message, searches for detecting presence of a broadcast control channel associated with the type IS-95C cell sites, measures a carrier to interference ratio of the broadcast control channel, compares the carrier to interference ratio to a threshold, if the carrier to interference ratio is above the threshold, initiates a second communication according to IS-95C standard, thus, allowing initiating a soft handoff operation by allowing the base sites to transmit information according to the IS-95B and IS-95C standards respectively via the first and second signals. MScombines the first and second signals to take advantage of the soft hand-off operation.