摘要:
Embodiments of the invention describe a method and device for controlling a physical layer of a communication device to operate in one of three modes of communication. In a first mode, the device is able to demodulate frames of a Complimentary Code Keying (CCK) modulation type. In a second mode, the device is able to demodulate frames of an Orthogonal Frequency Division Multiplexing (OFDM) modulation type. In a third, autodetection mode, the device is able to automatically detect the modulation type of a received frame and to configure the communication device to demodulate the received frame according to the detected modulation type. Control of the physical layer may be based on criteria related to prior transmissions received or transmitted by the communication device.
摘要:
Embodiments of the present invention provide a method, apparatus and system for selectively modulating a data frame of a signal using either a frequency-multiplexing modulation method or a spatial-multiplexing modulation method based on a predetermined criterion.
摘要:
Briefly, a method and apparatus that may establish a secured direct link between a first station and a second station of wireless local area network. The establishment of this secured direct link may be done by an access point that may exchange protocol messages between the first station the second station and the access point.
摘要:
A method and device for adaptive control of transmission parameters such as data rate, fragmentation and request to send protection. Packet error rates for frames transmitted with and without request to send protection are computed and compared to determine whether error rates are attributable to noise or to collision. If error rates are attributable to noise, data rates may be adjusted and fragmentation may be activated. If error rates are attributable to collisions, request to send protection may be activated or adjusted.