Patent ID: 10064094

Abstract:
A communication device determines a physical layer (PHY) mode according to which a null data packet (NDP) is to be transmitted, the determined PHY mode from a set of PHY modes defined by a communication protocol, the set of PHY modes including i) a first PHY mode and ii) a second PHY mode. When it is determined that the NDP is to be transmitted according to the first PHY mode, the communication device generates the NDP according to a first PHY format, including generating a PHY preamble of the NDP according to a first preamble format. When it is determined that the NDP is to be transmitted according to the second PHY mode, the communication device generates the NDP according to a second PHY format, including generating the PHY preamble of the NDP according to a second preamble format; and transmitting the NDP with the communication device.