Transmission method and transmission apparatus for packet format detection
A transmission apparatus of the present disclosure comprises a packet generator which, in operation, generates a packet and a transmitter which, in operation, transmits the generated packet. The packet includes a legacy short training field, a legacy long training field, a legacy signal field (L-SIG), a repeated legacy signal field (RL-SIG), a first non-legacy signal field, a second non-legacy signal field, a non-legacy short training field, a non-legacy long training field and a data field, wherein the second non-legacy signal field is optionally present. The packet generator generates the packet by configuring the RL-SIG in different ways according to a presence or absence of the second non-legacy signal field in the packet.
1. A transmission apparatus comprising:
a packet generator which, in operation, generates a packet that includes a legacy short training field, a legacy long training field, a legacy signal field (L-SIG), a repeated legacy signal field (RL-SIG), a first non-legacy signal field, a second non-legacy signal field, a non-legacy short training field, a non-legacy long training field and a data field, wherein the second non-legacy signal field is optionally present in the packet, and the packet generator generates the packet by configuring the RL-SIG by using different modulation schemes depending on a presence or absence of the second non-legacy signal field in the packet; and
a transmitter which, in operation, transmits the generated packet,
wherein a pilot pattern used for configuring the RL-SIG is different according to the presence or absence of the second non-legacy signal field in the packet.
2. The transmission apparatus, according to claim 1 , wherein
a pilot pattern used for configuring the RL-SIG is different according to a type of the first non-legacy signal field and the presence or absence of the second non-legacy signal field.
3. The transmission apparatus, according to claim 1 , wherein
a modulation scheme and a pilot pattern used for configuring the RL-SIG is different according to at least one of a type of the first non-legacy signal field and the presence or absence of the second non-legacy signal field in the packet.
4. A transmission method comprising:
generating a packet that includes a legacy short training field, a legacy long training field, a legacy signal field (L-SIG), a repeated legacy signal field (RL-SIG), a first non-legacy signal field, a second non-legacy signal field, a non-legacy short training field, a non-legacy long training field and a data field, wherein the second non-legacy signal field is optionally present in the packet and the packet is generated by configuring the RL-SIG by using different modulation schemes depending on a presence or absence of the second non-legacy signal field in the packet; and
transmitting the generated packet,
wherein a pilot pattern used for configuring the RL-SIG is different according to the presence or absence of the second non-legacy signal field in the packet.
5. The transmission method, according to claim 4 , wherein
a pilot pattern used for configuring the RL-SIG is different according to a type of the first non-legacy signal field and the presence or absence of the second non-legacy signal field.
6. The transmission method, according to claim 4 , wherein
a modulation scheme and a pilot pattern used for configuring the RL-SIG is different according to at least one of a type of the first non-legacy signal field and the presence or absence of the second non-legacy signal field in the packet.