A method for wireless local area network, the method comprising, receiving, by a receiver, a data frame including a signal field and a data field, wherein a signal field includes a plurality of Very High Throughput Signal A (VHT-SIG-A) fields and a Very High Throughput Signal B (VHT-SIG-B) field, the plurality of VHT-SIG-A fields and the VHT-SIG-B field are received on an operating band, the operating band comprising a plurality of 20MHz bands; obtaining data from the data field based on the VHT-SIG-B field wherein: the VHT-SIG-B field is transmitted over the entire bandwidth in one OFDM symbol after the more than one OFDM symbols in which the plurality of VHT-SIG-A fields are transmitted; characterized in that: the plurality of VHT-SIG-A fields includes a first VHT-SIG-A field and a second VHT-SIG-A field; the first VHT-SIG-A field is transmitted on a first 20 MHz band among the plurality of 20 MHz bands; the second VHT-SIG-A field is transmitted on a second 20 MHz band among the plurality of 20 MHz bands; the VHT-SIG-B field comprises a first portion of bits, wherein the first portion of bits is repeated in the VHT-SIG-B field; the first portion of bits comprises a length indicator related to a length of the data field; a number of repetitions of the first portion of bits is determined based on the bandwidth of the operating band, said number of repetitions increasing as the bandwidth of the operating band increases; and a first number of bits representing the length indicator when the operating band is 40MHz is 2 bits shorter than a second number of bits representing the length indicator when the operating band is equal to 80MHz. receiving, by a receiver, a data frame including a signal field and a data field, wherein a signal field includes a plurality of Very High Throughput Signal A (VHT-SIG-A) fields and a Very High Throughput Signal B (VHT-SIG-B) field, the plurality of VHT-SIG-A fields and the VHT-SIG-B field are received on an operating band, the operating band comprising a plurality of 20MHz bands; obtaining data from the data field based on the VHT-SIG-B field wherein: the VHT-SIG-B field is transmitted over the entire bandwidth in one OFDM symbol after the more than one OFDM symbols in which the plurality of VHT-SIG-A fields are transmitted; characterized in that: the plurality of VHT-SIG-A fields includes a first VHT-SIG-A field and a second VHT-SIG-A field; the first VHT-SIG-A field is transmitted on a first 20 MHz band among the plurality of 20 MHz bands; the second VHT-SIG-A field is transmitted on a second 20 MHz band among the plurality of 20 MHz bands; the VHT-SIG-B field comprises a first portion of bits, wherein the first portion of bits is repeated in the VHT-SIG-B field; the first portion of bits comprises a length indicator related to a length of the data field; a number of repetitions of the first portion of bits is determined based on the bandwidth of the operating band, said number of repetitions increasing as the bandwidth of the operating band increases; and a first number of bits representing the length indicator when the operating band is 40MHz is 2 bits shorter than a second number of bits representing the length indicator when the operating band is equal to 80MHz. the VHT-SIG-B field is transmitted over the entire bandwidth in one OFDM symbol after the more than one OFDM symbols in which the plurality of VHT-SIG-A fields are transmitted; characterized in that: the plurality of VHT-SIG-A fields includes a first VHT-SIG-A field and a second VHT-SIG-A field; the first VHT-SIG-A field is transmitted on a first 20 MHz band among the plurality of 20 MHz bands; the second VHT-SIG-A field is transmitted on a second 20 MHz band among the plurality of 20 MHz bands; the VHT-SIG-B field comprises a first portion of bits, wherein the first portion of bits is repeated in the VHT-SIG-B field; the first portion of bits comprises a length indicator related to a length of the data field; a number of repetitions of the first portion of bits is determined based on the bandwidth of the operating band, said number of repetitions increasing as the bandwidth of the operating band increases; and a first number of bits representing the length indicator when the operating band is 40MHz is 2 bits shorter than a second number of bits representing the length indicator when the operating band is equal to 80MHz.