Transmission device and transmission method
In a transmission device, a signal processing circuit generates an aggregate physical layer convergence protocol data unit (A-PPDU) by adding a guard interval to each of a first part of a first physical layer convergence protocol data unit (PPDU) transmitted over each of a first through L'th channel of a predetermined channel bandwidth, where L is an integer of 2 or greater, a second part of the first PPDU transmitted over each of an (L+1)'th through P'th channel, which is a variable channel bandwidth that is N times the predetermined channel bandwidth, where N is an integer of 2 or greater and P is an integer of L+1 or greater, and a second PPDU transmitted over the (L+1)'th through P'th channel. A wireless circuit transmits the A-PPDU.
1. A transmission device, comprising:
a signal processing circuit that is configured to generate an aggregate physical layer convergence protocol data unit (A-PPDU) by adding a guard interval to each of:
a first part of a first physical layer convergence protocol data unit (PPDU),
a second part of the first PPDU, and
a second PPDU;
a wireless circuit that transmits the A-PPDU,
wherein the first PPDU includes a legacy STF, a legacy CEF, a legacy header field, a non-legacy STF, a non-legacy CEF, a non-legacy header field including one or more non-legacy headers, and one or more data fields including one or more payload data,
wherein the first part of the first PPDU includes:
the legacy STF and N−1 duplicates of said legacy STF in a frequency axis direction,
the legacy CEF and N−1 duplicates of said legacy CEF in a frequency axis direction,
the legacy header field and N−1 duplicates of said legacy header field in a frequency axis direction, and
the non-legacy header field and N−1 duplicates of said non-legacy header field in a frequency axis direction,
wherein the second part of the first PPDU includes the non-legacy STF, the non-legacy CEF, and the one or more data fields,
wherein the second PPDU includes one or more non-legacy header fields including one or more non-legacy headers, and the one or more data fields including one or more payload data, and
a wireless circuit that is configured to transmit the A-PPDU, wherein:
each of the legacy STF, the legacy CEF, the legacy header field, the non-legacy header field of the first PPDU, the N−1 duplicates of said legacy STF, the N−1 duplicates of said legacy CEF, the N−1 duplicates of said legacy header field, and the N−1 duplicates of said non-legacy header field of the first PPDU is transmitted using a predetermined channel bandwidth;
the second part of the first PPDU and the second PPDU are transmitted using a variable channel bandwidth that is N times the predetermined bandwidth; and
in a case where the wireless circuit transmits the first PPDU and the second PPDU by single carrier, each of the one or more non-legacy header fields of the second PPDU includes a non-legacy header that has been repeated N times.
2. The transmission device according to claim 1 , wherein the signal processing unit is configured to add:
a guard interval of N GI symbols to a non-legacy header of N NLH symbols included in the non-legacy header field in the first part of the first PPDU, and
a guard interval to a non-legacy header included in a non-legacy header field in the second PPDU, wherein the guard interval is:
of (N GI +M)×N symbols, when the non-legacy header is of N NLH −M symbols; and
of (N GI −M)×N symbols, when the non-legacy header is of N NLH +M symbols,
wherein.
3. A transmission method, comprising:
generating an aggregate physical layer convergence protocol data unit (A-PPDU) by adding a guard interval to each of:
a first part of a first physical layer convergence protocol data unit (PPDU),
a second part of the first PPDU, and
a second PPDU; transmitting the A-PPDU,
wherein the first PPDU includes a legacy STF, a legacy CEF, a legacy header field, a non-legacy STF, a non-legacy CEF, a non-legacy header field including one or more non-legacy headers, and one or more data fields including one or more payload data,
wherein the first part of the first PPDU includes:
the legacy STF and N−1 duplicates of said legacy STF in a frequency axis direction,
the legacy CEF and N−1 duplicates of said legacy CEF in a frequency axis direction,
the legacy header field and N−1 duplicates of said legacy header field in a frequency axis direction, and
the non-legacy header field and N−1 duplicates of said non-legacy header field in a frequency axis direction,
wherein the second part of the first PPDU includes the non-legacy STF, the non-legacy CEF, and the one or more data fields,
wherein the second PPDU includes one or more non-legacy header fields including one or more non-legacy headers, and one or more data fields including one or more payload data, and
transmitting the A-PPDU, wherein:
in a case of transmitting the first PPDU and the second PPDU by single carrier, each of the one or more non-legacy header fields of the second PPDU includes a non-legacy header that has been repeated N times.
4. The transmission method according to claim 3 , wherein
a guard interval of N GI symbols is added to a non-legacy header of N NLH symbols included in the non-legacy header field in the first part of the first PPDU, and
a guard interval is added to a non-legacy header included in a non-legacy header field in the second PPDU, wherein the guard interval is:
of (N GI +M)×N symbols, when the non-legacy header is of N NLH −M symbols; and
of (N GI −M)×N symbols, when the non-legacy header is of N NLH +M symbols,
wherein N GI is an integer of 1 or greater, N NLH is an integer of 1 or greater, and M is an integer of 0 or greater.