Patent ID: 9614938
Date: 2017-04-04
CPC Classifications: H04L,H04W,Y02D

Claim:
1. A method for transmitting a data block in a wireless local area network, the method comprising: generating, by a transmitter, a physical layer protocol data unit (PPDU) that includes a short training field, a long training field and a signal field; and transmitting, by the transmitter, the PPDU to a receiver, wherein the signal field includes a frame type field that indicates whether the PPDU is used to carry a null data packet (NDP) frame that does not have a data field, wherein when the frame type field does not indicate that the PPDU is used to carry the NDP frame, the signal field includes a bandwidth field, a stream field, a modulation and coding scheme (MCS) field, and a coding type field, the bandwidth field indicating a bandwidth used for the PPDU, the stream field indicating a number of spatial streams used for the PPDU, the MCS field indicating a MCS index used for the PPDU, the coding type field indicating a type of channel coding used for the PPDU, and wherein when the frame type field indicates that the PPDU is used to carry the NDP frame, the signal field indicates a type of the NDP frame and does not include the MCS field.