Training packet sending method and apparatus

A training packet receiving method in a second device, wherein the method comprises:

• receiving, on L channels of N channels, a training field from a first device using a training packet comprising a preamble, a header comprising a legacy header, the training field, and a data field located after the header and before the training field, wherein the header further comprises training field channel information indicating a channel occupied by the training field;
• receiving, repeatedly from the first device using the N channels, the preamble;
• receiving, from the first device using the N channels, the legacy header;
• receiving, from the first device using H channels of the N channels, the training field, wherein N is greater than one, wherein H is greater than one and less than or equal to N, and wherein L is less than or equal to H;
• measuring the L channels based on the received training field;
• determining measurement results of the L channels;
• transmitting the measurement results to the first device;
• and
• receiving the data field using J channels of the N channels, wherein J is greater than or equal to zero.

A training packet sending apparatus comprising:

• a processor configured to generate a training packet comprising a preamble, a header comprising a legacy header, a training field, and a data field located after the header and before the training field, wherein the header further comprises training field channel information indicating a channel occupied by the training field;
• and
• a transceiver coupled to the processor and configured to:
• repeatedly send the preamble using N channels;
• send the legacy header using the N channels;
• send the training field to at least one second device using H channels of the N channels, wherein N is greater than one, and wherein H is greater than one and less than or equal to N;
• and
• send the data field using J channels of the N channels, wherein J is greater than or equal to zero.

A data packet receiving apparatus comprising:

• a transceiver configured to:
• receive, on L channels of N channels, a training field from a first device using a training packet, wherein the training packet comprises a preamble, a header comprising a legacy header, the training field, and a data field located after the header and before the training field wherein the header further comprises training field channel information indicating a channel occupied by the training field;
• receive, repeatedly from the first device using the N channels, the preamble;
• receive, from the first device using the N channels, the header;
• receive, from the first device using H channels of the N channels, the training field, wherein N is greater than one, wherein H is greater than one and less than or equal to N, and wherein L is less than or equal to the H;
• and
• a processor coupled to the transceiver and configured to:
• measure the L channels based on the received training field;
• and
• determine measurement results of the L channels, and
• wherein the transceiver is further configured to:
• transmit the measurement results of the L channels to the first device;
• and
• receive, from the first device, the data field using J channels of the N channels, wherein J is greater than or equal to zero.