‘Shield’: protecting high priority channel...

Details ‘Shield’: protecting high priority channel... ‘Shield’: protecting high priority channel...

2007-07-24

2007-07-24

Pham, Brenda (Department: 2616)

Multiplex communications

Channel assignment techniques

Carrier sense multiple access

C370S447000

Reexamination Certificate

active

10256299

ABSTRACT:
A method and system reduce interference between overlapping first and second wireless LAN cells contending for the same medium. Each cell includes a respective plurality of member stations. An inter-cell contention-free period value is assigned to a first access point station in the first cell, associated with an accessing order in the medium for member stations in the first and second cells. The access point in the first cell transmits an initial shield packet to deter other stations from contending for the medium. The access point then transmits a beacon packet containing the inter-cell contention-free period value to member stations in the second cell. A second access point in the second cell can then delay transmissions by member stations in the second cell until after the inter-cell contention-free period expires. The beacon packet sent by the first access point station also includes an intra-cell contention-free period value, which causes the member stations in the first cell to delay accessing the medium until polled by the first access point. After the expiration of the intra-cell contention-free period, member stations in the first cell may contend for the medium based on the quality of service (QoS) data they are to transmit, using the Tiered Contention Multiple Access (TCMA) protocol.

REFERENCES:
patent: 5142533 (1992-08-01), Crisler et al.
patent: 5185739 (1993-02-01), Spear
patent: 5329531 (1994-07-01), Diepstraten et al.
patent: 5353287 (1994-10-01), Kuddes et al.
patent: 5355375 (1994-10-01), Christensen
patent: 5416780 (1995-05-01), Patel
patent: 5636223 (1997-06-01), Reardon et al.
patent: 5644576 (1997-07-01), Bauchot et al.
patent: 5682381 (1997-10-01), Sekihata et al.
patent: 5768267 (1998-06-01), Raith et al.
patent: 5828663 (1998-10-01), Ikegami
patent: 5852405 (1998-12-01), Yoneda et al.
patent: 5852723 (1998-12-01), Kalkunte et al.
patent: 5892769 (1999-04-01), Lee
patent: 5987033 (1999-11-01), Beer et al.
patent: 5999818 (1999-12-01), Gilbert et al.
patent: 6011784 (2000-01-01), Brown et al.
patent: 6047175 (2000-04-01), Trompower
patent: 6052594 (2000-04-01), Chuang et al.
patent: 6055578 (2000-04-01), Williams et al.
patent: 6067291 (2000-05-01), Kamerman et al.
patent: 6078591 (2000-06-01), Kalkunte et al.
patent: 6272117 (2001-08-01), Choi et al.
patent: 6343071 (2002-01-01), Lansford
patent: 6418148 (2002-07-01), Kumar et al.
patent: 6434187 (2002-08-01), Beard et al.
patent: 6473414 (2002-10-01), Hartley et al.
patent: 6493331 (2002-12-01), Walton et al.
patent: 6614799 (2003-09-01), Gummalla et al.
patent: 6625162 (2003-09-01), Myojo et al.
patent: 6832093 (2004-12-01), Ranta
patent: 7095754 (2006-08-01), Benveniste
patent: 2002/0061031 (2002-05-01), Sugar et al.
patent: 2002/0152324 (2002-10-01), Sherman
patent: 2003/0013451 (2003-01-01), Walton
patent: 2003/0103521 (2003-06-01), Raphaeli
patent: 2003/0123405 (2003-07-01), Del Prado et al.
patent: 2003/0224787 (2003-12-01), Gandolfo
patent: 2004/0022219 (2004-02-01), Mangold et al.
patent: 2006/0041676 (2006-02-01), Sherman
patent: 0994604 (2000-04-01), None
patent: WO 03/039054 (2003-05-01), None
Bononi, L., Conti, M., and Gregori, E., “Design and Performance Evaluation of an Asymptotically Optimal Backoff Algorithm for IEEE 802.11 Wireless LANs”,Proceedings of the 33rdHawaii International Conference on System Sciences—2000, Jan. 4-7, 2000, pp. 1-10.
Deng, Dr-Jiunn and Chang, Ruay-Shiung, “A Priority Scheme for IEEE 802.11 DCF Access Method”,IEICE Trans. Commun., Jan. 1999, vol. E82-B., No. 1, pp. 96-102.
IEEE Std 802.11, “Local and Metropolitan Area Networks”, 1997, p. 92.

Affiliated with

Also associated with

Rating

‘Shield’: protecting high priority channel... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with ‘Shield’: protecting high priority channel..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ‘Shield’: protecting high priority channel... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3751080