Title:
無線ローカルエリアネットワーク(WLAN)用コントローラ、WLANの動作パラメータを動的に調整する方法および無線通信局用コントローラ
Document Type and Number:
Japanese Patent JP4059553
Kind Code:
B2
Abstract:
A station in the WLAN monitors each transmitted frame to determine whether the frame transmission was protected by an existing outstanding airtime reservation. If a frame is transmitted without an airtime reservation and no response frame is received, the station assumes that the transmission failed due to contention, and monitors the number of contention attempts made to transmit each frame, and the number of failures to receive an acknowledgement. Based on this information, the station dynamically adjusts an RTS/CTS threshold used to determine whether or not an RTS/CTS exchange mechanism should be enabled. If a frame is transmitted during a time interval protected by an outstanding airtime reservation and no response frame is received, the station assumes that the transmission failed due to a bit error, and monitors the number of bit error rate (BER) attempts made to transmit each frame, and the number of BER failures to receive an acknowledgement. Based on this information, the station dynamically adjusts a fragmentation threshold used to determine whether or not a data frame fragmentation mechanism should be enabled.
Inventors:
Matthew Jay Fisher
William F Khan
William F Khan
Application Number:
JP2837998A
Publication Date:
March 12, 2008
Filing Date:
February 10, 1998
Export Citation:
Assignee:
ADVANCED MICRO DEVICES INCORPORATED
International Classes:
H04L12/28; H04L29/08; H04L1/00
Domestic Patent References:
| JP10261980A | ||||
| JP8289368A | ||||
| JP64071360A | ||||
| JP8274788A | ||||
| JP5048610A |
Foreign References:
| US5012469 |
Attorney, Agent or Firm:
Kuro Fukami
Toshio Morita
Hidehiko Ito
Yutaka Horii
Toshio Morita
Hidehiko Ito
Yutaka Horii