Patent ID: 8824441

Claim:
A wireless device of transmitting a data frame in a wireless local area network, the wireless device comprising: a media access control (MAC) unit configured to generate a data frame; a physical (PHY) unit configured to transmit a wireless signal of the data frame; and a processor being operably coupled to the MAC unit and the PHY unit and controlling a set of Transmission Vector (TXVECTOR) parameters, wherein the processor is configured for generating the set of TXVECTOR parameters, the set of TXVECTOR parameters including a service field TXVECTOR parameter; generating a data unit, the data unit including a data field having a service field and a very high throughput signal field (VHT-SIG-B), the service field including a scrambler initialization field, a reserved field and a cyclic redundancy check (CRC) field, the VHT-SIG-B including a length field and a tail field; and transmitting a wireless signal of the data unit via an operating channel bandwidth, wherein the data field is scrambled with a scrambling sequence, and the scrambling sequence is generated based on an initial scrambling sequence and a generator polynomial, wherein the service field is determined based on the service field TXVECTOR parameter and the VHT-SIG-B, and wherein the CRC field is set to CRC bits calculated based on the VHT-SIG-B excluding tail bits of the tail field.