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:
Apr. 08, 2008
Filed:
Dec. 02, 2002
Xiaoning He, Sunnyvale, CA (US);
Daichi Funato, Mountain View, CA (US);
Xiaoning He, Sunnyvale, CA (US);
Daichi Funato, Mountain View, CA (US);
NTT DoCoMo Inc., Tokyo, JP;
Abstract
A communications protocol in a system such as an IEEE 802.11 wireless LAN multi-hop system providing transmission scheduling information is disclosed. The transmission scheduling is formatted within a CF−Poll+Data+SIPS data frame transmitted by the point coordinator (PC) which may be any one of the access point (AP) nodes transmitting in turn as dictated by the scheduling parameters within the scheduling information parameter set (SIPS). The SIPS comprises an offset field, the time left for the presently functioning PC; a delay field, where an AP delays functioning as a PC; and the interval field, the time allowed for an AP to function as a PC. The subsequent scheduling of assigned transmission slots by providing boundaries for the transmission frames through SIPS eliminates collisions resulting from multiple units transmitting simultaneously, thereby supporting interactive media and voice communications on WLAN multi-hop systems.