Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2007-10-02
2007-10-02
Ho, Duc (Department: 2616)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S401000, C370S449000
Reexamination Certificate
active
10187132
ABSTRACT:
A method and system reduce interference between overlapping first and second wireless LAN cells in a medium. Each cell includes a respective plurality of member stations and there is at least one overlapped station occupying both cells. 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 transmits a beacon packet containing the inter-cell contention-free period value, which is intercepted at the overlapped station. The overlapped station forwards 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: 5185739 (1993-02-01), Spear
patent: 5329531 (1994-07-01), Diepstraten et al.
patent: 5353287 (1994-10-01), Kuddes et al.
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), Raphaell 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
“Amendment—Radio Equipment and Systems (RES); HIgh PErformance Radio Local Area Network (HIPERLAN), Type 1; Functional Specification,” ETSI, ETS 300 652, May 1997, pp. 1-21.
“Broadband Radio Access Network (BRAN); HIPERLAN Type 2; System Overview,” ETSI, ETSI TR 101 683 V1.1.1 (Feb. 2000), Technical Report, pp. 1-19.
“Broadband Radio Access Networks (BRAN); HIPERLAN Type 2; Data Link Control (DLC) Layer; Part 4: Extension for Home Environment,” ETSI, ETSI TS 101 761-4 V1.2.1 (Dec. 2000), pp. 1-125.
W. Diepstraten, “Wireless Access Method and Physical Specification,” IEEE, IEEE P802.11-97/70, May 1993, pp. 1-16, slides 1-6.
R. White, “Wireless Access Method and Physical Layer Specifications,” IEEE, IEEE P802.11-93/159, Sep. 1993, pp. 1-8.
W. Diepstraten et al., “Wireless Access Method and Physical Specification,” IEEE, IEEE P802.11-94/150, Jul. 1994, pp. 1-12, slides 1-11 & 1-23.
Andrew S. Tanenbaum,Computer Networks, 3rdEdition, 1996 Prentice Hall, Chapter 4, “The Medium Access Sublayer,” pp. 243-338.
James L. Massey, “Collision-Resolution Algorithms and Random-Access Communications,”Multi-User Communication Systems, edited by G. Longo, Universita' di Trieste, 1981 by CISM, Udine, pp. 73-137.
Leonard Kleinrock et al., “Packet Switching in Radio Channels: Part I—Carrier Sense Multiple-Access Modes and Their Throughput-Delay Characteristics,” IEEE Transactions on Communications, vol. Com-23, No. 12, Dec. 1975, pp. 1400-1416.
Ronald L. Rivest, “Network Control by Bayesian Broadcast,” IEEE Transactions on Information Theory, vol. IT-33, No. 3, May 1987, pp. 323-328.
Phil Karn, “MACA—A New Channel Access Method for Packet Radio,” 9th Computer Networking Conference, ARRL/CRRL Amateur Radio, 1990, pp. 134-140.
Vaduvur Bharghavan et al., “MACAW: A Media Access Protocol for Wireless LAN's,” Computer Communication Review, vol. 24, No. 4, Oct. 1994, pp. 212-225.
The Bluetooth Special Interest Group, Specification of the Bluetooth System, Version 1.1, Feb. 22, 2001, pp. 41-47.
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 Change, 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.
Ho Duc
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