Patent ID: 7039412
Filing Date: 2006-05-02
Classification: H04L,H04W

Abstract:
1. A method for use in a wireless network, comprising: generating a data unit; and wirelessly transmitting said data unit; wherein a first portion of said transmitted data unit includes first information that is coded over a single frequency channel and a second portion of said transmitted data unit includes second information that is coded across multiple frequency channels; wherein: said first information in said first portion of said transmitted data unit can be read by wireless client devices within a first class and wireless client devices within a second class; and said second information in said second portion of said transmitted data unit can be read by wireless client devices within said second class, but not by wireless client devices within said first class; wherein: said first information in said first portion of said transmitted data unit includes duration related information that can be used by a wireless client device within said first class to determine a duration for which said wireless client device is to remain quiet to avoid collision.