Implementing a smart antenna in wireless local area network

Telecommunications – Transmitter – Diversity

Reexamination Certificate

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C455S562100, C455S277100

Reexamination Certificate

active

07376398

ABSTRACT:
A method for implementing a smart antenna in establishing association between a station (STA) and an access point (AP) in a wireless local area network begins by transmitting a beacon frame by the AP on one antenna beam. The beacon frame is received at the STA, which measures the signal quality of the beacon frame. The AP switches to a different antenna beam and repeats the method until the beacon frame has been transmitted on all antenna beams. The STA associates to the AP that transmits the beacon frame with the highest signal quality on one of its antenna beams. A similar method may be used in which the STA sends a probe request frame to the AP, which then responds with probe response frames sent on multiple antenna beams.

REFERENCES:
patent: 7206610 (2007-04-01), Iacono et al.
patent: 7236759 (2007-06-01), Cha et al.
IEEE Wireless LAN Edition, A Compilation Based On IEEE Std. 802.11™-1999 (R2003) and its amendments, pp. 1-678.
IEEE Standard for Information Technology—Telecommunications and Information Exchange Between Systems—Local and Metropolitan Area Networks—Specific Requirements, Part 11: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Amendment 7: Medium Access Control (MAC) Quality of Service (QoS) Enhancements, Aug. 2004.
IEEE Standard for Information Technology—Telecommunications and Information Exchange Between Systems—Local and Metropolitan Area Networks—Specific Requirements, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, Amendment 5: Spectrum and Transmit Power Management Extensions in the 5GHz Band in Europe, Oct. 2003.
Draft Amendment to Standard For Telecommunications and Information Exchange Between Systems—LAN/MAN Specific Requirements—Part 11: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications: Amendment 7: Radio Resource Measurement, Jul. 2004.

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