Method and apparatus for transmitting control frame to...

Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...

Reexamination Certificate

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C370S315000, C370S319000, C370S324000, C370S445000, C370S447000, C455S422100

Reexamination Certificate

active

07944874

ABSTRACT:
A method and apparatus informs nodes included in a wireless local area network (LAN) of how to avoid access collision in a wireless LAN. A wireless LAN access point or an independent basic service set (IBSS) control station receives a Contention-Free-End (CF-End) frame, compares a basic service set ID (BSSID) of the received CF-End frame of the access point or the IBSS, and rebroadcasts the received CF-End frame if the comparison result indicates that the two BSSIDs coincide with each other. Thus, all stations included in one BSS can receive the same time information for controlling medium access.

REFERENCES:
patent: 2002/0141368 (2002-10-01), Cheung et al.
patent: 2007/0115882 (2007-05-01), Wentink
Ki-Ho Lee and Dong-Ho Cho: A Multiple Access Collision Avoidance Protocol for Multicast Services in Mobile Ad Hoc Networks; Vehicular Technology Conference, 2003; The 57th IEEE Semiannual; IEEE Communications Letters.
“Adaptive Random Access Scheme based on Traffic Load and QoS in a Wireless Communication System”; Ki-Ho Lee and Dong-Ho Cho; Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual, vol. 3, Apr. 22-35, 2003 pp. 1793-1797.
“MiFi: A framework for Fairness and QoS Assurance in Current IEEE 802.11 Networks with Multiple Access Points”; Bejerano, Y. and Bhatia, R. S.; INFOCOM 2004. Twenty-third Annual Joint Conference of the IEEE Computer and Communications Societies, vol. 2, Mar. 7-11, 2004 pp. 1229-1240.

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