Patent ID: 9634794
Date: 2017-04-25
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method of transmitting a packet in a wireless local area network system, the method performed by a transmitting station and comprising: generating the packet comprising a data field and a first signal field including a first field, a second field, and a third field; and transmitting the packet to a single receiving station or a plurality of receiving stations, wherein the first field indicates a group ID of the single receiving station or the plurality of receiving stations and whether the packet is generated based on a single user transmission scheme or a multi user transmission scheme, wherein, for the single user transmission scheme, at least one pre-determined value of the first field is used to indicate that the packet is generated based on the single user transmission scheme, and, for the multi user transmission scheme, at least one value of the first field is a value assigned to a station group for the multi user transmission scheme, wherein the second field and the third field are determined based on whether the packet is generated based on the single user transmission scheme or the multi user transmission scheme, the second field has a length of four bits including a first bit to a fourth bit, the four bits of the second field are used to indicate a modulation and coding scheme (MCS) index used for the packet if the packet is generated based on the single user transmission scheme, each of the first, second and third bits of the second field is used to indicate an encoding scheme applied to a corresponding receiving station of the plurality of receiving stations if the packet is generated based on the multi user transmission scheme, the third field indicates an encoding scheme applied to the single receiving station if the packet is generated based on the single user transmission scheme, and the third field indicates an encoding scheme applied to a receiving station of the plurality of receiving stations which is not indicated by the second field if the packet is generated based on the multi user transmission scheme.