US Patent 7423970 Cross-layer rate adaptation mechanism for WLAN

Patent 7423970 was granted and assigned to Industrial Technology Research Institute on September, 2008 by the United States Patent and Trademark Office.

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Current Assignee

Industrial Technology Research Institute

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7423970

Date of Patent

September 9, 2008

Patent Application Number

11249397

Date Filed

October 14, 2005

Patent Primary Examiner

Lee Nguyen

Patent abstract

A cross-layer rate adaptation mechanism for wireless local area network (WLAN) can obtain the channel state by calculating the Eb/N0 ratio of ACK frame transmitted from the receiver side. The mechanism determines the transmission rate of the next frame by referring to a predefined reduced mode table. When receiving an ACK frame fails, the mechanism can automatically lower the transmitting rate of the next transmission. Therefore, the method can reduce the damage to the system when ACK frame failure happens.

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