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:
Jul. 24, 2012
Filed:
Aug. 02, 2000
Timothy J. Moulsley, Caterham, GB;
Bernard Hunt, Red Hill, GB;
Timothy J. Moulsley, Caterham, GB;
Bernard Hunt, Red Hill, GB;
U.S. Philips Corporation, Andover, MA (US);
Sharp Corporation, Osaka, JP;
Abstract
A radio communication system has a random access channel for the transmission of data () from a secondary station to a primary station. Such a channel is intended for use by secondary stations having packets of data () to transmit to a primary station while not actually engaged in a call. The primary station transmits a random access channel availability (AV) message () once per frame to inform secondary stations about the resources currently available. Hence a secondary station can select a channel known to be free. If no channels are available the secondary station can avoid a wasted access attempt.