Multiplex communications – Channel assignment techniques – Using time slots
Reexamination Certificate
2006-11-07
2010-12-21
Sheikh, Ayaz R (Department: 2476)
Multiplex communications
Channel assignment techniques
Using time slots
C370S431000, C370S462000
Reexamination Certificate
active
07856031
ABSTRACT:
A method and apparatus for guaranteeing fairness regarding access to a medium among a plurality of stations in a wireless local area network (WLAN) where a plurality of high throughput (HT) stations and a plurality of 802.11 legacy stations coexist are provided. In the WLAN, information that allows a plurality of hearing legacy stations and a plurality of hearing HT stations which receive a data frame having an HT format transmitted by a transmitting HT station to fairly contend for use of a medium is transmitted as a frame having a format that can be interpreted by all the legacy HT stations. Therefore, the legacy stations can contend for a medium under the same conditions as the HT stations.
REFERENCES:
patent: 7039068 (2006-05-01), Halasz
patent: 2003/0128684 (2003-07-01), Hirsch et al.
patent: 2005/0141540 (2005-06-01), Li et al.
patent: 2005/0226270 (2005-10-01), Liu et al.
patent: 2005/0232275 (2005-10-01), Stephens
patent: 2006/0018332 (2006-01-01), Kakani et al.
patent: 2006/0126545 (2006-06-01), Nanda
patent: 2006/0227801 (2006-10-01), Nanda et al.
patent: 2006/0251183 (2006-11-01), Soffer
patent: 2006/0291498 (2006-12-01), Stephens
patent: 2007/0010237 (2007-01-01), Jones et al.
ANSI/IEEE Std 802.11, 1999 Edition, “Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications”.
Li, Z.; Nandi, S.; Gupta, A.K., “Improving fairness in IEEE 802.11 using enhanced carrier sensing,”Communications, IEE Proceedings- , vol. 151, No. 5, pp. 467-472, Oct. 24, 2004.
Heindl, Arman et al: “The Impact of Backoff, and Beacons on the Performance of IEEE 802.11 Wireless LANs”, Computer Performance and Dependability Symposium, 2000. IPDS 2000, Proceedings, IEEE International, Mar. 27-9, 2000, pp. 103-112.
Wall, Joshua et al: “Adaptive Multimedia Packet Transmission for Broadband IEEE 802.11 Wireless LANs”, Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on Sep. 2006, pp. 1-5.
Utsunomiya, Yoriko, et al: “A MAC Protocol for Coexistence between 20/40 MHz STAs for High Throughput WLAN”, Vehicular Technology Conference, 2006. VTC 2006-Spring (May), IEEE 63rd, vol. 3, 2006, pp. 1136-1140.
“HT PHY Specification”, Enhanced Wireless Consortium, ver. 1.27 (Dec. 23, 2005).3
Kwon Chang-yeul
Yang Chil-youl
Hampton Tarell
Samsung Electronics Co,. Ltd.
Sheikh Ayaz R
Sughrue & Mion, PLLC
LandOfFree
Method and apparatus for guaranteeing fairness regarding... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for guaranteeing fairness regarding..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for guaranteeing fairness regarding... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4161602