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. 25, 2007
Filed:
Jun. 17, 2003
Bin Liu, Weston, FL (US);
Charbel Khawand, Miami, FL (US);
Jianping W. Miller, Coral Springs, FL (US);
Bin Liu, Weston, FL (US);
Charbel Khawand, Miami, FL (US);
Jianping W. Miller, Coral Springs, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
Half duplex, Frequency Hopped-Spread Spectrum wireless transceivers (), operating without a central controller, maintain time synchronization with the frequency hopping sequence for a period after transmission of a half duplex signal ceases. The wireless transceiver () operates their receivers () according to the RF frequency hopping sequence and schedule (). The wireless transceiver () is then able to send a short transmission request to signal that it will start transmitting on the Frequency Hopping schedule () of the previously ceased transmission. A wireless transceiver () that was either the original transmitter or the original receiver is able to transmit this transmission request. A subset of time slots within the hopping schedule () can be optionally assigned to the original transmitter and original receiver to obviate collisions of the transmit request transmissions from both device at the same time.