Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2004-08-12
2009-02-10
Pham, Chi H (Department: 2616)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S332000, C370S465000
Reexamination Certificate
active
07489666
ABSTRACT:
The present invention relates to a media access control (MAC) apparatus and method for guaranteeing quality-of-service in a wireless local area network (LAN). The MAC method comprises: extracting a user priority from a frame received from an upper layer and separately storing a voice frame and a general frame according to an access category (AC); independently performing backoff operations for the voice frame and the general frame; determining whether the backoff operations for the voice frame and the general frame have simultaneously ended; if the backoff operations have simultaneously ended, transmitting the voice frame having a higher priority first and performing the backoff operation for the general frame; and if the backoff operations have not simultaneously ended, transmitting a frame whose backoff operation ends.
REFERENCES:
patent: 7095754 (2006-08-01), Benveniste
patent: 2002/0071413 (2002-06-01), Choi
patent: 2003/0072280 (2003-04-01), McFarland et al.
patent: 2004/0151144 (2004-08-01), Benveniste
patent: 2004/0170150 (2004-09-01), Guo et al.
patent: 2006/0045022 (2006-03-01), Kneckt et al.
“QoS Support MAC Technology for Wireless Home Networking” fromKorean Institute of Communication and Sciences2003, vol. 20-6, pp. 727-734, Abstract.
Sunghyun Choi: Seoul National University, “Emerging IEEE 802.11e WLAN for Quality-of-Service (QoS) Provisioning,” SK Telecom Telecommunications Review, vol. 12, No. 6, 2002, pp. 894-906.
Hwang Dae Hwan
Koo Ki Jong
Blakely & Sokoloff, Taylor & Zafman
Chou Albert T
Electronics and Telecommunications Research Institute
Pham Chi H
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