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:
Feb. 19, 2002
Olaf Hirsch, Sunnyvale, CA (US);
Atul Kumar Garg, San Jose, CA (US);
Sunghyun Choi, Montvale, NJ (US);
Abraham Jan DE Bart, Nuenen, NL;
Paul Gruijters, Best, NL;
Olaf Hirsch, Sunnyvale, CA (US);
Atul Kumar Garg, San Jose, CA (US);
Sunghyun Choi, Montvale, NJ (US);
Abraham Jan de Bart, Nuenen, NL;
Paul Gruijters, Best, NL;
NXP B.V., Eindhoven, NL;
Abstract
A local area network is provided where an OFDM station and DSSS/CCK station coexist. During a contention-free period both stations operate under the point coordination function rules as defined in the IEEE 802.11 specification. Both stations transmit data when polled by the access point. The contention-free period comprises a sub-contention period during which only the OFDM station communicate. During the sub-contention period the OFDM station operates under the distributed coordination function while the DSSS/CCK station waits to be polled by the access point before starting to communicate.