Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2007-10-02
2007-10-02
Hsu, Alpus H. (Department: 2616)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S348000, C370S444000, C370S448000
Reexamination Certificate
active
10256471
ABSTRACT:
A staggered startup method and system for a cyclic prioritized multiple access (CPMA) 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. A first member station in the first cell coordinates a periodic sequence of first contention-free sessions. Each contention-free session includes multiple bursts with other member stations in the first cell. The first member station retains control of the medium by using interframe spaces sufficiently short between the bursts so that the multiple bursts appear to contending stations to be a single instance of activity in the medium during a session until an end of a session. A second member station in the second cell listens to the activity in the medium and detects an end to one of the first contention-free sessions indicated by an interval longer than a PIFS idle interval following an end to the activity in the medium. The second member station then sets a post-backoff delay to periodically transmit a minimal interval after the first contention-free sessions of the first member station. The second member station coordinates in the second cell a periodic sequence of second contention-free sessions. In this manner, contention-free sessions are interleaved on a periodic basis in the first and second cells.
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: 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: 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 et al.
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.
AT&T Corp.
Hsu Alpus H.
LandOfFree
Staggered startup for cyclic prioritized multiple access... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Staggered startup for cyclic prioritized multiple access..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Staggered startup for cyclic prioritized multiple access... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3866024