Method for transmitting and receiving signal in wireless LAN system and apparatus for said method

Abstract

Disclosed are a method for a station for transmitting and receiving a signal in a wireless local area network (WLAN) system, and an apparatus for the method. More specifically, disclosed are a method for transmitting and receiving a signal and an apparatus for the method, the method, when a station transmits and receives a signal by means of a channel in which three channels have been bonded, generating an enhanced directional multi gigabit (EDMG) short training field (STF) for an orthogonal frequency division multiplexing (OFDM) packet, and transmitting and receiving a signal comprising the generated EDMG STF field.

Claims

1. A method, performed by a first station (STA) in a wireless LAN (WLAN) system, the method comprising: transmitting an Enhanced Directional Multi Gigabit (EDMG) Physical Protocol Data Unit (PPDU) including an EDMG Short Training Field (STF) field in an Orthogonal Frequency Division Multiplexing (OFDM) mode through space-time streams (STSs) within 6.48 GHz from a second STA, wherein the EDMG STF field is generated based on a number of channels and a number of STSs, wherein an EDMG STF sequence for each of the STSs is used for the EDMG STF field, wherein the EDMG STF sequence for each of the STSs is configured to have a format of {A, 0, 0, 0, B}, wherein when a STS index of the STSs is 1, A is defined as {0, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0}, and when the STS index is of the STSs is 1, B is defined as {0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, −1, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +1, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, −1, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −1, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, +1, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −1, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, −1, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, 0}.

2. The method of claim 1, wherein non-zero values included in A are configured based on a first sequence having a length of 4, a second sequence having a length of 3, and a third sequence having a length of 3, and the first, second and third sequences are repeatedly included in A with a predetermined weight, and wherein non-zero values included in B are configured based on a fourth sequence having a length of 4, the second sequence having a length of 3, and the third sequence having a length of 3, and the fourth, second and third sequences are repeatedly included in B with a predetermined weight.

3. The method of claim 2, wherein the first sequence and the fourth sequence are configured based on Table 21: TABLE-US-00026 TABLE 21 Space-time stream number p.sup.i.sup.STS q.sup.i.sup.STS 1 [−j +j −j −j] [−j −j −j +j] 2 [−j +1 +j +1] [−j −1 +j −1] 3 [+1 −j +1 −j] [+1 −1 −1 +1] 4 [+j −j −j +j] [−j −1 −j −1] 5 [+1 −j −1 −j] [−1 −j +1 −j] 6 [−1 −j −1 −j] [+1 +1 −1 −1] 7 [+1 +1 +1 −1] [−1 +1 −1 −1] 8 [−j −j +j +j] [−j +1 −j +1] where p.sup.i.sup.STS denotes the first sequence, q.sup.i.sup.STS denotes the fourth sequence, and iSTS denotes each STS, wherein the second sequence and the third sequence are configured based on Equation 31:
A.sub.0.sup.i.sup.STS(n)=[+1,+1,−1]
B.sub.0.sup.i.sup.STS(n)=[+1,+j,+1]  [Equation 31] where A.sub.0.sup.i.sup.STS(n) denotes the second sequence, and B.sub.0.sup.i.sup.STS(n) denotes the third sequence, wherein non-zero values included in A and B are configured of sequences of subSeq.sub.left,148.sup.i.sup.STS(n) and subSeq.sub.right,148.sup.i.sup.STS(n), each being determined by Equation 32 shown below:
subSeq.sub.left,148.sup.i.sup.STS(n)=[p.sup.i.sup.STS,A.sub.4.sup.i.sup.STS,A.sub.4.sup.i.sup.STS,−A.sub.4.sup.i.sup.STS]
subSeq.sub.right,148.sup.i.sup.STS(n)=[B.sub.4.sup.i.sup.STS,jB.sub.4.sup.i.sup.STS,B.sub.4.sup.i.sup.STS,q.sup.i.sup.STS]  [Equation 32] wherein, in Equation 32, each of A.sub.4.sup.i.sup.STS and B.sub.4.sup.i.sup.STS is determined by Equation 33 shown below:
A.sub.k.sup.i.sup.STS(n)=[W.sub.k.sup.i.sup.STSA.sub.k-1.sup.i.sup.STS(n),B.sub.k-1.sup.i.sup.STS(n)]
B.sub.k.sup.i.sup.STS(n)=[W.sub.k.sup.i.sup.STSA.sub.k-1.sup.i.sup.STS(n),−B.sub.k-1.sup.i.sup.STS(n)]  [Equation 33] wherein W.sub.k.sup.i.sup.STS for each STS shown in Equation 33 is determined as shown below in Table 22. TABLE-US-00027 TABLE 22 Space-time stream number W.sub.k.sup.i.sup.STS 1 [+1, +1, +1, +1] 2 [+1, +1, −1, +1] 3 [+1, −1, +1, +1] 4 [+1, −1, +1, −1] 5 [−1, +1, +1, −1] 6 [−1, −1, +1, −1] 7 [−1, −1, −1, +1] 8 [−1, −1, −1, −1]

4. A station device in a wireless LAN (WLAN) system, the station device comprising: a transceiver configured to transmit/receive a signal to/from another station device; and a processor being operatively connected to the transceiver and performing signal processing of the signal, wherein the processor is configured to: transmit an Enhanced Directional Multi Gigabit (EDMG) Physical Protocol Data Unit (PPDU) including an EDMG Short Training Field (STF) field in an Orthogonal Frequency Division Multiplexing (OFDM) mode through space-time streams (STSs) within 6.48 GHz from the other STA, wherein the EDMG STF field is generated based on a number of channels and a number of STSs, wherein an EDMG STF sequence for each of the STSs is used for the EDMG STF field, wherein the EDMG STF sequence for each of the STSs is configured to have a format of {A, 0, 0, 0, B}, wherein when a STS index of the STSs is 1, A is defined as {0, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0}, and when the STS index of the STSs is 1, B is defined as {0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, −1, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +1, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, −1, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −1, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, +1, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −1, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, −1, 0, 0, 0, +j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, +j, 0, 0, 0, −1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −j, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −1, 0, 0, 0, −1, 0, 0, 0, +1, 0, 0, 0, +1, 0, 0, 0, +j, 0, 0, 0, +1, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, −j, 0, 0, 0, +j, 0, 0, 0, 0}.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The appended drawings of this specification are presented to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and serve to explain the principle of the disclosure along with the description of the present document.

(2) FIG. 1 is a diagram showing an exemplary configuration of a wireless LAN (WLAN) system.

(3) FIG. 2 is a diagram showing another exemplary configuration of a wireless LAN (WLAN) system.

(4) FIG. 3 is a diagram describing a channel in a 60 GHz band for describing a channel bonding operation according to an exemplary embodiment of the present disclosure.

(5) FIG. 4 is a diagram describing a basic method for performing channel bonding in a wireless LAN (WLAN) system.

(6) FIG. 5 is a diagram describing a configuration of a beacon interval.

(7) FIG. 6 is a diagram describing a physical configuration of a legacy radio frame.

(8) FIG. 7 and FIG. 8 are diagrams describing a configuration of a header field of the radio frame shown in FIG. 6.

(9) FIG. 9 is a diagram showing a PPDU structure that can be applied to the present disclosure.

(10) FIG. 10 is a diagram showing a simple PPDU structure that can be applied to the present disclosure.

(11) FIG. 11 is a diagram showing a packet preamble that is included in a (legacy) preamble according to the present disclosure.

(12) FIG. 12 to FIG. 17 are diagrams showing Golay sequences that can be applied to the present disclosure

(13) FIG. 18 is a diagram respectively showing bandwidths of an SC packet and an OFDM packet in case of a 2-channel bonding and a 4-channel bonding.

(14) FIG. 19 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where iSTS is equal to 1,

(15) FIG. 20 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where iSTS is equal to 2,

(16) FIG. 21 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where iSTS is equal to 3,

(17) FIG. 22 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where i.sub.STS is equal to 4.

(18) FIG. 23 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where i.sub.STS is equal to 5,

(19) FIG. 24 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where iSTS is equal to 6,

(20) FIG. 25 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where iSTS is equal to 7, and

(21) FIG. 26 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where i.sub.STS is equal to 8.

(22) FIG. 27 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_left,595 in a case where i.sub.STS is equal to 1 or 2,

(23) FIG. 28 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_left,595 in a case where i.sub.STS is equal to 3 or 4,

(24) FIG. 29 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_left,595 in a case where i.sub.STS is equal to 5 or 6, and

(25) FIG. 30 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_left,595 in a case where iSTS is equal to 7 or 8.

(26) FIG. 31 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_right,595 in a case where i.sub.STS is equal to 1 or 2,

(27) FIG. 32 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_right,595 in a case where i.sub.STS is equal to 3 or 4,

(28) FIG. 33 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_right,595 in a case where i.sub.STS is equal to 5 or 6, and

(29) FIG. 34 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_right,595 in a case where iSTS is equal to 7 or 8.

(30) FIG. 35 is a flow chart showing a signal transmission method according to an exemplary embodiment of the present disclosure.

(31) FIG. 36 is a diagram describing a device for implementing the above-described method.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

(32) Hereinafter, the preferred embodiment of the present disclosure will be described in detail with reference to the appended drawings. The detailed description that will hereinafter be disclosed along with the appended drawings will only be provided to describe an exemplary embodiment of the present disclosure. And, therefore, it should be understood that the exemplary embodiment presented herein will not represent the only embodiment for carrying out the present disclosure.

(33) The following detailed description includes specific details for providing a full understanding of the present disclosure. However, it will be apparent to anyone skilled in the art that the present disclosure can be carried out without referring to the above-mentioned specific details. In some cases, in order to avoid any ambiguity in the concept of the present disclosure, the disclosed structure and device may be omitted, or the disclosed structure and device may be illustrated as a block diagram based on their core functions.

(34) Although diverse mobile communication systems applying the present disclosure may exist, a wireless LAN (WLAN) system will hereinafter be described in detail as an example of such mobile communication system.

(35) 1. Wireless LAN (WLAN) System

(36) 1-1. General Wireless LAN (WLAN) System

(37) FIG. 1 is a diagram showing an exemplary configuration of a wireless LAN (WLAN) system.

(38) As shown in FIG. 1, a wireless LAN (WLAN) includes one or more Basic Service Set (BSS). A BSS is a set (or group) of stations (STAs) that successfully achieve synchronization so as to communication with one another.

(39) As a logical entity including a Medium Access Control (MAC) and a Physical Layer interface for a wireless medium, an STA includes an access point (AP) and a non-AP Station. Among the STAs, a portable device (or terminal) that is operated by a user corresponds to a non-AP Station. And, therefore, when an entity is simply mentioned to as an STA, the STA may also refer to a non-AP Station. Herein, the non-AP Station may also be referred to as other terms, such as a terminal, a wireless transmit/receive unit (WTRU), a user equipment (UE), a mobile station (MS), a mobile terminal, a mobile subscriber unit, and so on.

(40) Additionally, the AP is an entity providing its associated station (STA) with an access to a distribution system (DS) through a wireless medium. Herein, the AP may also be referred to as a centralized controller, a base station (B), a Node-B, a base transceiver system (BTS), a personal basic service set central point/access point (PCP/AP), a site controller, and so on.

(41) A BSS may be categorized as an infrastructure BSS and an independent BSS (IBSS).

(42) The BSS shown in FIG. 1 corresponds to an IBSS. The IBSS refers to a BSS that does not include an AP. And, since the BSS does not include an AP, access to the DS is not authorized (or approved), and, therefore, the IBSS functions as a self-contained network.

(43) FIG. 2 is a diagram showing another exemplary configuration of a wireless LAN (WLAN) system.

(44) The BSS shown in FIG. 2 corresponds to an infrastructure BSS. The infrastructure BSS includes one or more STAs and APs. As a rule, although the communication between non-AP STAs is established by passing through the AP, in case a direct link is configured between the non-AP STAs, direct communication may also be established between the non-AP STAs.

(45) As shown in FIG. 2, a plurality of infrastructure BSSs may be interconnected to one another through the DS. The plurality of BSSs being interconnected to one another through the DS is collectively referred to as an extended service set (ESS). The STAs being included in the ESS may perform communication between one another, and, a non-AP STA may shift (or relocate) from one BSS to another BSS within the same ESS while performing uninterrupted communication.

(46) As a mechanism that connects the plurality of APs, the DS is not necessarily required to correspond to a network. As long as the DS is capable of providing a predetermined distribution service, there is no limitation in the structure or configuration of the DS. For example, the DS may correspond to a wireless network, such as a mesh network, or the DS may correspond to a physical structure (or entity) that connects the APs to one another.

(47) Hereinafter, a channel bonding method that is performed in a wireless LAN system will hereinafter be described in detail based on the description presented above.

(48) 1-2. Channel Bonding in a Wireless LAN (WLAN) System

(49) FIG. 3 is a diagram describing a channel in a 60 GHz band for describing a channel bonding operation according to an exemplary embodiment of the present disclosure.

(50) As shown in FIG. 3, 4 channels may be configured in a 60 GHz band, and a general channel bandwidth may be equal to 2.16 GHz. An ISM band (57 GHz 66 GHz), which is available for usage in 60 GHz, may be differently regulated in accordance with the circumstances (or situations) of each country. Generally, among the channels shown in FIG. 3, since Channel 2 is available for usage is all regions, Channel 2 may be used as a default channel. Channel 2 and Channel 3 may be used is most regions excluding Australia. And, accordingly, Channel 2 and Channel 3 may be used for channel bonding. However, it shall be understood that diverse channels may be used for channel bonding. And, therefore, the present disclosure will not be limited to only one or more specific channels.

(51) FIG. 4 is a diagram describing a basic method for performing channel bonding in a wireless LAN (WLAN) system.

(52) The example shown in FIG. 4 corresponds to an example of combining two 20 MHz channels and operating (or using) the combined channels for 40 MHz channel bonding in an IEEE 802.11n system. In case of an IEEE 802.11ac system, 40/80/160 MHz channel bonding may be performed.

(53) The two exemplary channels of FIG. 4 include a primary channel and a secondary channel, and the STA may examine the channel status of the primary channel, among the two channels, by using a CSMA/CA method. If the primary channel is idle during a constant backoff interval, and, at a time point where the backoff count is equal to 0, if the secondary channel is idle during a predetermined period of time (e.g., PIFS), the STA may transmit data by combining the primary channel and the secondary channel.

(54) However, in case of performing contention-based channel bonding, as shown in FIG. 4, as described above, since channel bonding can be performed only in a restricted case where the secondary channel maintains the idle state during a predetermined period of time at a time point where the backoff count for the primary channel is expired, the usage of channel bonding is very restricted (or limited). And, therefore, there lies a difficulty in that measures cannot be flexibly taken in accordance with the circumstances (or situation) of the medium.

(55) Accordingly, in an aspect of the present disclosure, a solution (or method) for performing scheduling-based access by having the AP transmit scheduling information to the STAs is proposed. Meanwhile, in another aspect of the present disclosure, a solution (or method) for performing contention-based channel access based on the above-described scheduling or independently from the above-described scheduling is proposed. Furthermore, in yet another aspect of the present disclosure, a method for performing communication through a spatial sharing technique based on beamforming is proposed.

(56) 1-3. Beacon Interval Configuration

(57) FIG. 5 is a diagram describing a configuration of a beacon interval.

(58) In an 11ad-based DMG BSS system, the time of medium may be divided into beacon intervals. A lower level period within the beacon interval may be referred to as an access period. Each of the different access periods within one beacon interval may have a different access rule. Such information on the access period may be transmitted by an AP or personal basic service set control point (PCP) to a non-AP STA or non-PCP.

(59) As shown in the example of FIG. 5, one beacon interval may include one Beacon Header Interval (BHI) and one Data Transfer Interval (DTI). As shown in FIG. 4, the BHI may include a Beacon Transmission Interval (BTI), an Association Beamforming Training (A-BFT), and an Announcement Transmission Interval (ATI).

(60) The BTI refers to a period (or section or duration) during which one more DMG beacon frames may be transmitted. The A-BFT refers to a period during which beamforming training is performed by an STA, which has transmitted a DMG beacon frame during a preceding BTI. The ATI refers to a request-response based management access period between PCP/AP and non-PCP/non-AP STA.

(61) Meanwhile, the Data Transfer Interval (DTI) refers to a period during which a frame exchange is performed between the STAs. And, as shown FIG. 5, one or more Contention Based Access Periods (CBAPs) and one or more Service Periods (SPs) may be allocated (or assigned) to the DTI. Although FIG. 5 shows an example where 2 CBAPs and 2 SPs are allocated to the DCI, this is merely exemplary. And, therefore, the present disclosure is not necessarily required to be limited only to this.

(62) Hereinafter, a physical layer configuration in a wireless LAN (WLAN) system, in which the present disclosure is to be applied, will be described in detail.

(63) 1-4. Physical Layer Configuration

(64) It will be assumed that the wireless LAN (WLAN) system according to an exemplary embodiment of the present disclosure may provide 3 different modulations mode as shown below.

(65) TABLE-US-00019 TABLE 1 PHY MCS Note Control PHY 0 Single carrier PHY 1, ..., 12 (low power (SC PHY) 25, ..., 31 SC PHY) OFDM PHY 13, ..., 24

(66) Such modulation modes may be used for satisfying different requirements (e.g., high throughput or stability). Depending upon the system, among the modulation modes presented above, only some of the modulation modes may be supported.

(67) FIG. 6 is a diagram describing a physical configuration of a legacy radio frame.

(68) It will be assumed that all Directional Multi-Gigabit (DMG) physical layers commonly include the fields that are shown below in FIG. 6. However, a regulation method of each individual field and a modulation/coding scheme used in each field may vary depending upon each mode.

(69) As shown in FIG. 6, a preamble of a radio frame may include a Short Training Field (STF) and a Channel Estimation (CE). Additionally, the radio frame may also include a header and a data field as a payload of the radio frame and may optionally include a training (TRN) field for beamforming.

(70) FIG. 7 and FIG. 8 are diagrams describing a configuration of a header field of the radio frame shown in FIG. 6.

(71) More specifically, FIG. 7 illustrates a case where a Single Carrier (SC) mode is used. In the SC mode, the header may include information indicating an initial value of scrambling, information indicating a Modulation and Coding Scheme (MCS) and a data length, information indicating the presence or absence of an additional Physical Protocol Data Unit (PPDU), and information on a packet type, a training length, aggregation or non-aggregation, a presence or absence of a beam training request, a last Received Signal Strength Indicator (RSSI), truncation or non-truncation, a Header Check Sequence (HCS), and so on. Additionally, as shown in FIG. 7, the header has 4 bits of reserved bits, and, in the description presented below, such reserved bits may also be used.

(72) Additionally, FIG. 8 illustrates a detailed configuration of a header corresponding to a case where the OFDM mode is applied. the header may include information indicating an initial value of scrambling, information indicating a MCS and a data length, information indicating the presence or absence of an additional PPDU, and information on a packet type, a training length, aggregation or non-aggregation, a presence or absence of a beam training request, a last RSSI, truncation or non-truncation, a Header Check Sequence (HCS), and so on. Additionally, as shown in FIG. 8, the header has 2 bits of reserved bits, and, just as in the case of FIG. 7, in the description presented below, such reserved bits may also be used.

(73) As described above, the IEEE 802.11 ay system considers for the first time the adoption of channel bonding the MIMO technique to the legacy 11ad system. In order to implement channel boning and MIMO, the 11ay system requires a new PPDU structure. In other words, when using the legacy 11ad PPDU structure, there are limitations in supporting the legacy user equipment (UE) and implementing channel bonding and MIMO at the same time.

(74) For this, a new field for the 11ay UE may be defined after the legacy preamble and legacy header field for supporting the legacy UE. And, herein, channel bonding and MIMO may be supported by using the newly defined field.

(75) FIG. 9 is a diagram showing a PPDU structure according to a preferred embodiment of the present disclosure. In FIG. 9, a horizontal axis may correspond to a time domain, and a vertical axis may correspond to a frequency domain.

(76) When two or more channels are bonded, a frequency band having a predetermined size (e.g., a 400 MHz band) may exist between a frequency band (e.g., 1.83 GHz) that is used between each channel. In case of a Mixed mode, a legacy preamble (legacy STF, legacy CE) is duplicated through each channel. And, according to the exemplary embodiment of the present disclosure, it may be considered to perform the transmission (gap filling) of a new STF and CE field along with the legacy preamble at the same time through the 400 MHz band between each channel.

(77) In this case, as shown in FIG. 9, the PPDU structure according to the present disclosure has a structure of transmitting ay STF, ay CE, ay Header B, and ay payload after legacy preamble, legacy header, and ay Header A via wideband. Therefore, the ay Header and ay Payload fields, which are transmitted after the Header field, may be transmitted through the channels that are used for the channel bonding. Hereinafter, in order to differentiate the ay Header from the legacy Header, the ay Header may be referred to as an enhanced directional multi-gigabit (EDMG) Header, and the corresponding terms may be used interchangeably.

(78) For example, a total of 6 channels or 8 channels (each corresponding to 2.16 GHz) may exist in the 11ay system, and a maximum of 4 channels may be bonded and transmitted to a single STA. Accordingly, the ay header and the ay Payload may be transmitted through bandwidths of 2.16 GHz, 4.32 GHz, 6.48 GHz, and 8.64 GHz.

(79) Alternatively, a PPDU format of a case where the legacy preamble is repeatedly transmitted without performing the above-described gap-filling may also be considered.

(80) In this case, since the Gap-Filling is not performed, the PPDU has a format of transmitting the ay STF, ay CE, and ay Header B after the legacy preamble, legacy header, and ay Header A without the GF-STF and GF-CE fields, which are illustrated in dotted lines in FIG. 8.

(81) FIG. 10 is a diagram showing a simple PPDU structure that can be applied to the present disclosure. When briefly summarizing the above-described PPDU format, the PPDU format may be illustrated as shown in FIG. 10.

(82) As shown in FIG. 10, the PPDU format that is applicable to the flay system may include L-STF, L-CEF, L-Header, EDMG-Header-A, EDMG-STF, EDMG-CEF, EDMG-Header-B, Data, and TRN fields, and the above-mentioned fields may be selectively included in accordance with the format of the PPDU (e.g., SU PPDU, MU PPDU, and so on).

(83) Herein, the part (or portion) including the L-STF, L-CEF, and L-header fields may be referred to as a Non-EDMG portion, and the remaining part (or portion) may be referred to as an EDMG portion (or region). Additionally, the L-STF, L-CEF, L-Header, and EDMG-Header-A fields may be referred to as pre-EDMG modulated fields, and the remaining fields may be referred to as EDMG modulated fields.

(84) The (legacy) preamble part of the above-described PPDU may be used for packet detection, Automatic Gain Control (AGC), frequency offset estimation, synchronization, indication of modulation (SC or OFDM), and channel estimation. A format of the preamble may be common to both OFDM packets and SC packets. Herein, the preamble may be configured of a Short Training Field (STF) and a Channel Estimation (CE) field that is positioned after the STF field.

(85) FIG. 11 is a diagram showing a packet preamble that is included in a (legacy) preamble according to the present disclosure.

(86) The STF is configured of 16 repetitions of Ga.sub.128(n) sequences having the length of 128 followed by a single −Ga.sub.128(n) sequence. Herein, the waveform for the STF may be expressed as shown in the following equation.

(87) $\begin{array}{cc}& \left[\mathrm{Equation}1\right]\end{array}$$\begin{array}{cc}\begin{array}{c}{r}_{\mathrm{STP}}\left({\mathrm{nT}}_c\right)=\\ \{\begin{array}{cc}\left({\mathrm{Ga}}_{128}\left(n\mathrm{mod}128\right)\right)\exp \left(j\pi \frac{n}{2}\right)& n=0,1,.Math.,16\times 128-1\\ \left(-{\mathrm{Ga}}_{128}\left(n\mathrm{mod}128\right)\right)\exp \left(j\pi \frac{n}{2}\right)& n=16\times 128,.Math.,17\times 128-1\end{array}\end{array}& \end{array}$

(88) The Golay sequences (e.g., Ga.sub.128(n), Gb.sub.128(n), Ga.sub.64(n), Gb.sub.64(n), Ga.sub.32(n), Gb.sub.32(b)) are used in the preamble, a single carrier guard interval, and beam refinement TRN-R/T and AGC fields. The Golay sequences may be referred to as complementary sequences. The subscript indicates the length of the sequences. The sequences are generated by using the following recursive procedure.
A.sub.0(n)=δ(n)
B.sub.0(n)=δ(n)
A.sub.k(n)=W.sub.kA.sub.k-1(n)+B.sub.k-1(n−D.sub.k)
B.sub.k(n)=W.sub.kA.sub.k-1(n)−B.sub.k-1(n−D.sub.k)  [Equation 2]

(89) Herein, in case n<0 or n≥2.sup.k, A.sub.k(n) and B.sub.k(n) may each be given the value of 0.

(90) In the above-described procedure, in case D.sub.k=[1 8 2 4 16 32 64] (k=1, 2, . . . , 7) and W.sub.k=[−1 −1 −1 −1 +1 −1 −1] are used, values may be given as Ga.sub.128(n)=A.sub.7(128-n) and Gb.sub.128(n)=B.sub.7(128-n).

(91) Alternatively, in the above-described procedure, in case D.sub.k=[2 1 4 8 16 32] and W.sub.k=[1 1 −1 −1 1 −1] are used, values may be given as Ga.sub.64(n)=A.sub.6(64-n) and Gb.sub.64(n)=B.sub.6(64-n).

(92) Alternatively, in the above-described procedure, in case D.sub.k=[1 4 8 2 16] and W.sub.k=[−1 1 −1 1 −1] are used, values may be given as Ga.sub.32(n)=A.sub.5(32-n) and Gb.sub.32(n)=B.sub.5(32-n).

(93) Each of the above-described sequences may be indicated as shown in FIG. 12 to FIG. 17. Herein, the sequences are normative, the description presented above is informative.

(94) Hereinafter, FIG. 12 to FIG. 17 are diagrams showing Golay sequences that can be applied to the present disclosure.

(95) 3. Exemplary Embodiment that is Applicable to the Present Disclosure

(96) The PPDU format shown in FIG. 10 may be applied as the PPDU format of the 11ay system that is applicable to the present disclosure. Herein, an AGC field may be additionally included in a section that is positioned between the Data field and the TRN field.

(97) At this point, each field may be defined as shown below.

(98) TABLE-US-00020 TABLE 2 Field Description L-STF Non-EDMG Short Training field L-CEF Non-EDMG Channel Estimation field L-Header Non-EDMG Header field EDMG-Header-A EDMG Header A field EDMG-STF EDMG Short Training field EDMG-CEF EDMG CHannel Estimation field EDMG-Header-B EDMG Header B field Data The Data field carriers the PSDU(s) AGC Automatic Gain Control field TRN Training sequences field

(99) In case the STA according to the present disclosure is operated in accordance with a Single Input Single Output (SISO) scheme that uses a single channel, the EDMG-STF and EDMG-CEF of Table 2 may not be transmitted.

(100) Hereinafter, a method of designing an EDMG-STF for an OFDM packet (or for an OFDM transmission mode) is proposed based on the above-described technical configurations. More specifically, the present disclosure proposes a method of designing an EDMG-STF for an OFDM packet while considering the following reference details. Hereinafter, the reference details that are being considered in the present disclosure will be described in detail.

(101) (1) Frequency/Time Domain Sequence

(102) The EDMG-STF for an OFDM packet may be transmitted by being configured of a sequence that is generated in the time domain. For example, the EDMG-STF for an OFDM packet may be defined as a DMG-STF that is defined in the 11ad system, or as a new Golay sequence, or as an EDMG-STF for a single carrier (SC) that is defined in the 11ay system.

(103) As a method for matching the sequence defined in the above-described methods with a bandwidth that is occupied by the OFDM packet, a resampling method that is used in the 11ad system may be amended and used, or a new sampling rate may be defined and used. However, the implementation of such configuration may cause a considerable burden.

(104) Accordingly, the present disclosure proposes a method that allows the EDMG-STF to be compatible with an EDMG-CEF by generating a sequence that corresponds to the EDMG-STF in the frequency domain. Thus, by also allowing the bandwidths for the payloads to match one another, a more accurate AGC may be performed as compared to the STA.

(105) FIG. 18 is a diagram respectively showing bandwidths of an SC packet and an OFDM packet in case of a 2-channel bonding and a 4-channel bonding.

(106) As shown in FIG. 18, in case multiple channels are bonded, a difference between the bandwidth of the SC packet and the bandwidth OFDM packet may be equal to 0.47 GHz (e.g., in case of 2CB, see (a) of FIG. 18) or 1.28 GHz (e.g., in case of 4CB, see (b) of FIG. 18) in accordance with the number of bonded channels. Accordingly, a situation where the STA cannot perform an accurate AGC may occur. As described above, the occurrence of such situation increases in accordance with an increase in the number of bonded channels.

(107) (2) Processing, Time for L-Header Decoding

(108) The EDMG-STF for the SC packet is designed to have 18 Ga.sub.128*N.sub.CB sequences and 1−Ga.sub.128*N.sub.CB sequence considering the processing time of the DMG header. At this point, the time occupied by the total of 18+1 sequences is equal to approximately 1.3818 us. Herein, N.sub.CB indicates a number of channels being used for channel bonding by using a channel bonding factor.

(109) As described above, the EDMG-STF for the OFDM packet that is proposed in the present disclosure may also be designed while considering the processing time of the DMG header. At this point, when it is assumed that the length (T.sub.DFT+T.sub.GI) of one OFDM symbol is equal to 0.2424 us, 6 or more OFDM symbols may be needed for the decoding of the legacy header. This is because 1.3818 us/0.2424 us=5.7. Thus, the configuration of an EDMG-STF by using 6 OFDM symbols is proposed in the present disclosure.

(110) (3) Compatible Structure to EDMG-STF for SC

(111) As described above, the EDMG-STF for the SC may have a structure of being repeated 4 times within a single carrier block by using Ga128 (in case N.sub.CB=1). Herein, the structure that is repeated as described above and the number of such structure may influence the AGC and the synchronization performance. Accordingly, the OFDM-specific EDMG-STF may also have a structure of being repeated 4 times during one DFT/IDFT period so as to have similar performance requirement values as the SC.

(112) Herein, the structure of having a specific sequence being repeated 4 times during one DFT/IDFT period is advantageous in that, when considering that a Cyclic Prefix (CP) length of the 11ad system is configured of T.sub.DFT/4, the corresponding structure has a uniform structure wherein a specific sequence is repeated 5 times during one OFDM symbol period.

(113) As described above, in order to allow a specific sequence to be repeated 4 times within the time domain during the DFT/IDFT period, the EDMG-STF for the OFDM according to the present disclosure may have a structure of having 3 zeros (0s) being repeatedly inserted within the frequency domain.

(114) (4) Hardware (HW) Complexity

(115) As a solution for reducing hardware (HW) complexity, a value other than 0 being included in the EDMG-STF sequence, which is proposed in the present disclosure, may be given a value corresponding to any one of +1, −1, +j, and −j.

(116) (5) Orthogonality for MIMO Support

(117) In order to support MIMO transmission, the sequences for each of the spatial streams according to the present disclosure may be designed to be mutually orthogonal (or orthogonal to one another).

(118) (6) Peak to Average Power Ratio (PAPR) Performance

(119) In order to achieve highly reliable signal transmission and reception, the sequences according to the present disclosure may be designed to minimize PAPR. Most particularly, the EDMG-STF according to the present disclosure may be designed to have a similar PAPR as the PAPR (e.g., 3.12 dB) of the DMG-CEF of the 11ad system.

(120) Hereinafter, a sequence that is applicable to a case where one or two channels are bonded based upon the above-described reference details and a method for generating the corresponding sequence will be described in detail.

(121) Herein, the EDMG-STF according to the present disclosure has a fixed time size (or length) (e.g., 6 OFDM symbol periods). At this point, the fixed time size may be configured independently from the number of space-time sequences.

(122) The structure of the EDMG-STF field according to the present disclosure may be determined based on a number of consecutive channels (e.g., 2.16 GHz channel) being transmitted and an index of a space-time stream.

(123) Hereinafter, a sequence that is applicable to a case where three channels are bonded based upon the above-described reference details and a method for generating the corresponding sequence will be described in detail.

(124) In order to perform an EDMG OFDM transmission through a channel configured of three bonded channels (e.g., 6.48 GHz), a frequency sequence (or frequency domain signal), which is used for configuring the EDMG STF field for the i.sub.STS.sup.th space-time stream, may be expressed as shown below in the following equation.
EDMG-STF{circumflex over ( )}i.sub.STS_−596,596={0,0,0,EDMG{circumflex over ( )}i.sub.STS_left,592,0,0,0,EDMG{circumflex over ( )}i.sub.STS_right,592,0,0,0}  [Equation 3] where “i.sub.STS” is the space-time stream number and 1≤i.sub.STS≤8

(125) At this point, EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 for each space-time stream may be defined as shown in FIG. 19 to FIG. 26. More specifically, FIG. 19 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where i.sub.STS is equal to 1, FIG. 20 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where i.sub.STS is equal to 2, FIG. 21 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where i.sub.STS is equal to 3, FIG. 22 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where iSTS is equal to 4. FIG. 23 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where i.sub.STS is equal to 5, FIG. 24 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where i.sub.STS is equal to 6, FIG. 25 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where i.sub.STS is equal to 7, and FIG. 26 is a diagram showing EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 in a case where i.sub.STS is equal to 8.

(126) As a more simplified version of Equation 3 and each sequence shown in FIG. 19 to FIG. 26, sequences for each space-time stream may be expressed as shown below.
EDMG-STF{circumflex over ( )}i.sub.STS_−96,596={EDMG{circumflex over ( )}i.sub.STS_left,595,0,0,0,EDMG{circumflex over ( )}i.sub.STS_right,595}   [Equation 4] where: i.sub.STS is the space-time stream number and 1≤i.sub.STS≤8

(127) At this point, the EDMG{circumflex over ( )}i.sub.STS_left,595 and EDMG{circumflex over ( )}i.sub.STS_right,595 for each space-time stream may be respectively defined as {0, 0, 0, EDMG{circumflex over ( )}i.sub.STS_left,592} and {EDMG{circumflex over ( )}i.sub.STS_right,592, 0, 0, 0} of Equation 3. Accordingly, the EDMG{circumflex over ( )}i.sub.STS_left,595 and EDMG{circumflex over ( )}i.sub.STS_right,595 for each space-time stream may be defined as shown in FIG. 27 to FIG. 34. More specifically, FIG. 27 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_left,595 in a case where i.sub.STS is equal to 1 or 2, FIG. 28 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_left,595 in a case where i.sub.STS is equal to 3 or 4, FIG. 29 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_left,595 in a case where i.sub.STS is equal to 5 or 6, and FIG. 30 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_left,595 in a case where i.sub.STS is equal to 7 or 8. FIG. 31 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_right,595 in a case where i.sub.STS is equal to 1 or 2, FIG. 32 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_right,595 in a case where iSTS is equal to 3 or 4, FIG. 33 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_right,595 in a case where iSTS is equal to 5 or 6, and FIG. 34 is a diagram respectively showing EDMG{circumflex over ( )}i.sub.STS_right,595 in a case where iSTS is equal to 7 or 8.

(128) Referring to the above-described equations, iSTS may indicate a spatial stream index, and a subscript may indicate the length of each sequence. Additionally, the three zero (0) values that are positioned in the middle part of the equation presented above may denote a null carrier for a Direct Current (DC) offset removal.

(129) Meanwhile, as a solution for preventing unintentional beamforming, which occurs in a case where the same signal is transmitted from each stream when performing MIMO transmission, the sequences for each spatial stream that are proposed in the present disclosure may be designed to be mutually orthogonal.

(130) Hereinafter, as an example that is applicable to the present disclosure, an example for generating the above-described sequences will be described in detail. In other words, in order to generate the above-described sequence, the STA according to the present disclosure may use a sequence generating method, which will be described later on, or use sequence information (or table information) stored in a separate storage device, or use other diverse methods. Therefore, in order to generate an EDMG-STF field, the STA according to the present disclosure may use the detailed sequences that are described above. However, in this case, the STA according to the present disclosure may not necessarily use only the following method but may also use other methods so as to generate and use the above-described sequences.

(131) For example, the EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 for each spatial stream, which are defined as described above in Equation 3 and FIG. 19 to FIG. 26, may be drawn in accordance with the following procedure.

(132) Firstly, the EDMG{circumflex over ( )}i.sub.STS_left,592 and EDMG{circumflex over ( )}i.sub.STS_right,592 may be defined as shown below in the following equation. At this point, EDMG{circumflex over ( )}i.sub.STS_left,592 (n) may refer to an n.sup.th value of EDMG{circumflex over ( )}i.sub.STS_left,592, and EDMG{circumflex over ( )}i.sub.STS_right,592 (n) may refer to an n.sup.th value of EDMG{circumflex over ( )}i.sub.STS_right,592.

(133) $\begin{array}{cc}{\mathrm{EDMGS}}_{\mathrm{left},592}^{i_{\mathrm{STS}}}\left(n\right)=\{\begin{array}{cc}{\mathrm{subSeq}}_{\mathrm{left},148}^{i_{\mathrm{STS}}}\left(.Math.n/4.Math.\right),& n\mathrm{mod}4=1\\ 0,& n\mathrm{mod}4\ne 1\end{array}{\mathrm{EDMGS}}_{\mathrm{right},592}^{i_{\mathrm{STS}}}\left(n\right)=\{\begin{array}{cc}{\mathrm{subSeq}}_{\mathrm{right},148}^{i_{\mathrm{STS}}}\left(.Math.n/4.Math.\right),& n\mathrm{mod}4=2\\ 0,& n\mathrm{mod}4\ne 2\end{array}& \left[\mathrm{Equation}5\right]\end{array}$

(134) Referring to Equation 5, subSeq{circumflex over ( )}i.sub.STS_left,148 and subSeq{circumflex over ( )}i.sub.STS_right,148 may be defined as shown below in the following equation.
subSeq{circumflex over ( )}i.sub.STS_left,148(n)=[p{circumflex over ( )}i.sub.STS,A{circumflex over ( )}i.sub.STSA,A{circumflex over ( )}i.sub.STS_4,−A{circumflex over ( )}i.sub.STS_4]
subSeq{circumflex over ( )}i.sub.STS_right,148(n)=[B{circumflex over ( )}i.sub.STS,jB{circumflex over ( )}i.sub.STS_4,B{circumflex over ( )}i.sub.STS_4,q{circumflex over ( )}i.sub.STS_4]  [Equation 6]

(135) Referring to Equation 6, P.sup.i.sup.STS and q.sup.i.sup.STS may be defined in accordance with the space-time stream index (or number) as shown below in the following table.

(136) TABLE-US-00021 TABLE 3 Spatial stream number p.sup.i.sup.STS q.sup.i.sup.STS 1 [−j +j −j −j] [−j −j −j +j] 2 [−j +1 +j +1] [−j −1 +j −1] 3 [+1 −j +1 −j] [+1 −1 −1 +1] 4 [+j −j −j +j] [−j −1 −j −1] 5 [+1 −j −1 −j] [−1 −j +1 −j] 6 [−1 −j −1 −j] [+1 +1 −1 −1] 7 [+1 +1 +1 −1] [−1 +1 −1 −1] 8 [−j −j +j +j] [−j +1 −j +1]

(137) Additionally, referring to Equation 6, A.sub.k.sup.iSTS and B.sub.k.sup.iSTS may be generated through a recursive procedure, which is shown below in the following equation.
A.sub.0.sup.iSTS(n)=[+1,+1,−1], for i.sub.STS=1,2, . . . ,8
B.sub.0.sup.iSTS(n)=[+1,+j,+1], for i.sub.STS=1,2, . . . ,8
A.sub.k.sup.iSTS(n)=[W.sub.k.sup.iSTSA.sub.k-1.sup.iSTS(n),B.sub.k-1.sup.iSTS(n)]
B.sub.k.sup.iSTS(n)=[W.sub.k.sup.iSTSA.sub.k-1.sup.iSTS(n),−B.sub.k-1.sup.iSTS(n)]  [Equation 7]

(138) Herein, k indicates an iteration index, and W.sub.k.sup.iSTS indicates the weight for a sequence of the i.sub.STS.sup.th space-time stream and a k.sup.th iteration.

(139) A W.sub.k.sup.iSTS vector for each space-time stream may be expressed as shown below in Table 4.

(140) TABLE-US-00022 TABLE 4 Spatial stream number W.sub.k.sup.iSTS 1 [+1, +1, +1, +1] 2 [+1, +1, −1, +1] 3 [+1, −1, +1, +1] 4 [+1, −1, +1, −1] 5 [−1, +1, +1, −1] 6 [−1, −1, +1, −1] 7 [−1, −1, −1, +1] 8 [−1, −1, −1, −1]

(141) Additionally, in Equation 7, B.sub.0.sup.I.sup.STS(n)=[−1,−j,−1] may be applied instead of B.sub.0.sup.I.sup.STS(n)=[+1,+j,+1].

(142) Alternatively, referring to Equation 7, element values corresponding to an inverse order of the elements shown in Equation 7 may be applied to A.sub.0.sup.I.sup.STS and B.sub.0.sup.I.sup.STS. Accordingly, this may be expressed as A.sub.0.sup.I.sup.STS(n)=[−1,+1,+1] and B.sub.0.sup.I.sup.STS(n)=[+1,+j,+1].

(143) Meanwhile, elements satisfying mutual orthogonality may be applied as the vector for each space-time stream. For example, unlike Table 4, complex numbers including imaginary numbers may also be applied as the elements configuring the W.sub.k.sup.i.sup.STS vector for each space-time stream.

(144) In case of configuring the W.sub.k.sup.i.sup.STS vector for each space-time stream as shown in the table presented above, a PAPR for each space-time stream may be expressed as shown below.

(145) TABLE-US-00023 TABLE 5 Space-time PAPR stream number (dB) 1 3.85 2 3.86 3 3.87 4 3.80 5 3.88 6 3.88 7 3.89 8 3.91

(146) Referring to the above-described configurations, the EDMG-STF field transmit (or transmission) waveform in the time domain may be defined as shown below, in a case where the OFDM sampling rate corresponds to F.sub.s=N.sub.CB*2.64 GHz and where the time period (or duration) corresponds to T.sub.s=1/F.sub.s ns.

(147) $\begin{array}{cc}{r}_{\mathrm{EDMG}-\mathrm{STF}}^{n,i_{\mathrm{TX}}}\left({\mathrm{qT}}_s\right)=\frac{1}{\sqrt{N_{\mathrm{STS}}.Math.N_{\mathrm{EDMG}-\mathrm{STF}}^{\mathrm{Tone}}}}w\left({\mathrm{qT}}_s\right).Math..Math.\underset{k=-N_{\mathrm{SR}}}{\overset{N_{\mathrm{SR}}}{.Math.}}\underset{i_{\mathrm{STS}}=1}{\overset{N_{\mathrm{STS}}}{.Math.}}{\left[Q_k\right]}_{i_{\mathrm{TX}},i_{\mathrm{STS}}}\mathrm{EDMG}-{\mathrm{STF}}_k^{i_{\mathrm{STS}}}\exp \left(j2\pi k{\Delta }_F\left({\mathrm{qT}}_s\right)\right)& \left[\mathrm{Equation}8\right]\end{array}$

(148) Herein, in case N.sub.CB=1, 2, 3, and 4, the N.sub.EDMG-STF.sup.Tone is respectively equal to 88, 192, 296, and 400, and Q.sub.k indicates a k.sup.th spatial mapping matrix per subcarrier, and [ ].sub.m,n indicates a matrix element of an m.sup.th row and an net column. w(qT.sub.s) indicates a window function that is applied in order to mitigate (or smooth) the transitions between consecutive OFDM symbols. And, herein, the definition of the w(qT.sub.s) may be implementation dependent.

(149) FIG. 35 is a flow chart showing a signal transmission method according to an exemplary embodiment of the present disclosure.

(150) Firstly, a station (STA) according to the present disclosure generates an EDMG STF field, which is being transmitted in an OFDM mode (or transmitted for an OFDM packet) based on a number of channels (e.g., 3), which are included in a bonded channel through which an EDMG PPDU is transmitted, and an index of a space-time stream (S3510).

(151) At this point, an EDMG STF sequence for each space-time stream being included in the EDMG STF field may be configured to have a format of {A, 0, 0, 0, B}, and A and B may be configured of 595-length sequences.

(152) Most particularly, {A, 0, 0, 0, B} of each space-time stream may be orthogonal to {A, 0, 0, 0, B} of another space-time stream. In order words, an entire sequence {A, 0, 0, 0, B} for a first space-time stream may be configured to be orthogonal to an entire sequence {A, 0, 0, 0, B} for a second space-time stream.

(153) At this point, non-zero values that are included in A may be configured based on a first sequence having a length of 4 bit (or having 4 non-zero elements), a second sequence having a length of 3 (or having 3 non-zero elements), and a third sequence having a length of 3 (or having 3 non-zero elements), and the first, second and third sequences are repeatedly included in A with a predetermined weight, and non-zero values that are included in B may be configured based on a fourth sequence having a length of 4 (or having 4 non-zero elements), the second sequence having a length of 3 (or having 3 non-zero elements), and the third sequence having a length of 3 (or having 3 non-zero elements), and the fourth, second and third sequences are repeatedly included in A with a predetermined weight.

(154) Accordingly, A and B for each space-time stream may be configured as shown in FIG. 19 to FIG. 34.

(155) Herein, the EDMG STF field may be configured to have the length of 6 OFDM symbols.

(156) At this point, a maximum of 8 space-time streams may be configured, and a first sequence (P.sup.i.sup.STS) and a fourth sequence (q.sup.i.sup.STS) of each space-time stream (i.sub.STS) may each be configured as shown below in Table 6.

(157) TABLE-US-00024 TABLE 6 Spatial stream number p.sup.i.sup.STS q.sup.i.sup.STS 1 [−j +j −j −j] [−j −j −j +j] 2 [−j +1 +j +1] [−j −1 +j −1] 3 [+1 −j +1 −j] [+1 −1 −1 +1] 4 [+j −j −j +j] [−j −1 −j −1] 5 [+1 −j −1 −j] [−1 −j +1 −j] 6 [−1 −j −1 −j] [+1 +1 −1 −1] 7 [+1 +1 +1 −1] [−1 +1 −1 −1] 8 [−j −j +j +j] [−j +1 −j +1]

(158) A second sequence (A.sub.0.sup.i.sup.STS(n)) and a third sequence (B.sub.0.sup.i.sup.STS(n)) of each space-time stream (i.sub.STS) may each be configured to have a sequence as shown below in Equation 9.
A.sup.iSTS.sub.0(n)=[+1,+1,−1]
B.sup.iSTS.sub.0(n)=[+1,+j,+1]  [Equation 9]

(159) Herein, non-zero values that are included in A and B may be configured of sequences of subSeq{circumflex over ( )}i.sub.STS_left,148 (n) and subSeq{circumflex over ( )}i.sub.STS_right,148 (n), which are respectively determined by Equation 10 as shown below.
subSeq{circumflex over ( )}i.sub.STS_left,148(n)=[p{circumflex over ( )}i.sub.STS,A{circumflex over ( )}i.sub.STS_4,A{circumflex over ( )}i.sub.STS_4,−A{circumflex over ( )}i.sub.STS_4]
subSeq{circumflex over ( )}i.sub.STS_right,148(n)=[B{circumflex over ( )}i.sub.STS,jB{circumflex over ( )}i.sub.STS_4,B{circumflex over ( )}i.sub.STS_4,q{circumflex over ( )}i.sub.STS_4]  [Equation 10]

(160) In Equation 10, A.sub.k.sup.iSTS and B.sub.k.sup.iSTS are determined in accordance to Equation 11, which is shown below.
A.sub.k.sup.iSTS(n)=[W.sub.k.sup.iSTSA.sub.k-1.sup.iSTS(n),B.sub.k-1.sup.iSTS(n)]
B.sub.k.sup.iSTS(n)=[W.sub.k.sup.iSTSA.sub.k-1.sup.iSTS(n),−B.sub.k-1.sup.iSTS(n)]  [Equation 11]

(161) In Equation 11, the W.sub.k.sup.iSTS for each space-time stream may be configured as shown below in Table 7, which is shown below.

(162) TABLE-US-00025 TABLE 7 Spatial stream number W.sub.k.sup.iSTS 1 [+1, +1, +1, +1] 2 [+1, +1, −1, +1] 3 [+1, −1, +1, +1] 4 [+1, −1, +1, −1] 5 [−1, +1, +1, −1] 6 [−1, −1, +1, −1] 7 [−1, −1, −1, +1] 8 [−1, −1, −1, −1]

(163) Herein, A and B of each space-time stream may include a {0, 0, 0} sequence between the non-zero values.

(164) Most particularly, A of each space-time stream may include a {0, 0, 0, 0} sequence, which is positioned in a foremost position, and a {0, 0} sequence, which is positioned in a rearmost position. And, B of each space-time stream may include a {0, 0} sequence, which is positioned in a foremost position, and a {0, 0, 0, 0} sequence, which is positioned in a rearmost position.

(165) Thereafter, the station transmits the EDMG STF field being transmitted in the OFDM mode to another station through a space-time stream within the three bonded channels (S3520).

(166) 4. Device Configuration

(167) FIG. 36 is a diagram describing a device for implementing the above-described method.

(168) A wireless device (100) of FIG. 36 may correspond to an initiator STA, which transmits a signal that is described in the description presented above, and a wireless device (150) may correspond to a responder STA, which receives a signal that is described in the description presented above. At this point, each station may correspond to a 11ay device (or user equipment (UE)) or a PCP/AP. Hereinafter, for simplicity in the description of the present disclosure, the initiator STA transmits a signal is referred to as a transmitting device (100), and the responder STA receiving a signal is referred to as a receiving device (150).

(169) The transmitting device (100) may include a processor (110), a memory (120), and a transmitting/receiving unit (130), and the receiving device (150) may include a processor (160), a memory (170), and a transmitting/receiving unit (180). The transmitting/receiving unit (130, 180) transmits/receives a radio signal and may be operated in a physical layer of IEEE 802.11/3GPP, and so on. The processor (110, 160) may be operated in the physical layer and/or MAC layer and may be operatively connected to the transmitting/receiving unit (130, 180).

(170) The processor (110, 160) and/or the transmitting/receiving unit (130, 180) may include application-specific integrated circuit (ASIC), other chipset, logic circuit and/or data processor. The memory (120, 170) may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and/or other storage unit. When the embodiments are executed by software, the techniques (or methods) described herein can be executed with modules (e.g., processes, functions, and so on) that perform the functions described herein. The modules can be stored in the memory (120, 170) and executed by the processor (110, 160). The memory (120, 170) can be implemented (or positioned) within the processor (110, 160) or external to the processor (110, 160). Also, the memory (120, 170) may be operatively connected to the processor (110, 160) via various means known in the art.

(171) As described above, the detailed description of the preferred exemplary embodiment of the present disclosure is provided so that anyone skilled in the art can implement and execute the present disclosure. In the detailed description presented herein, although the present disclosure is described with reference to the preferred exemplary embodiment of the present disclosure, it will be understood by anyone having ordinary skills in the art that diverse modifications, alterations, and variations can be made in the present disclosure. Therefore, the scope and spirit of the present disclosure will not be limited only to the exemplary embodiments of the present disclosure set forth herein. Thus, it is intended to provide the broadest scope and spirit of the appended claims of the present disclosure that are equivalent to the disclosed principles and novel characteristics of the present disclosure.

INDUSTRIAL APPLICABILITY

(172) Although the present disclosure has been described in detail under the assumption that the present disclosure can be applied to an IEEE 802.11 based wireless LAN (WLAN) system, the present disclosure will not be limited only to this. It will be understood that the present disclosure can be applied to diverse wireless systems capable of performing data transmission based on channel bonding by using the same method as presented herein.