Wireless communication method and wireless communication terminal using same
The present invention relates to a wireless communication method for suggesting a packet preamble structure for efficient communication in a wireless communication environment in which a legacy terminal and a non-legacy terminal are mixed, and a wireless communication terminal using the same. For this, the present invention provides a wireless communication method including: generating a packet including a first preamble and a second preamble, wherein a first symbol and a second symbol of the second preamble are modulated using binary phase shift keying (BPSK); and transmitting the generated packet and a wireless communication terminal using the same.
1. A wireless communication terminal comprising:
a transceiver; and
a processor,
wherein the processor is configured to:
receive, through the transceiver, a first preamble of a wireless packet,
receive, through the transceiver, a second preamble of the wireless packet according to an identified configuration of the second preamble,
wherein the configuration of the second preamble is identified based at least in part on a detected constellation of a specific symbol of the second preamble,
wherein when the detected constellation of the specific symbol is a first constellation, the second preamble includes a high efficiency signal A field (HE-SIG-A) composed of four symbols, and
wherein when the detected constellation of the specific symbol is a second constellation, the second preamble includes an HE-SIG-A composed of two symbols and a high efficiency signal B field (HE-SIG-B).
2. The wireless communication terminal of claim 1 ,
wherein when the second preamble includes an HE-SIG-A composed of four symbols, a first symbol and a second symbol of the HE-SIG-A have same data, and a third symbol and a fourth symbol of the HE-SIG-A have same data.
3. The wireless communication terminal of claim 1 ,
wherein when the detected constellation of the specific symbol is the first constellation, the HE-SIG-A is immediately followed by a high efficiency short training field (HE-STF) of the second preamble.
4. The wireless communication terminal of claim 1 ,
wherein when the detected constellation of the specific symbol is the second constellation, the second preamble includes an HE-SIG-A composed of two symbols immediately followed by the HE-SIG-B.
5. The wireless communication terminal of claim 1 ,
wherein the specific symbol is a third symbol after a legacy signal field (L-SIG) of the first preamble.
6. The wireless communication terminal of claim 1 ,
wherein the second preamble includes a repeated L-SIG (RL-SIG) composed of a first symbol of the second preamble, and
wherein the specific symbol is a second symbol after the RL-SIG.
7. The wireless communication terminal of claim 1 ,
wherein the first constellation is quadrature binary phase shift keying (QBPSK) and the second constellation is binary phase shift keying (BPSK).
8. The wireless communication terminal of claim 1 ,
wherein the first preamble includes a legacy short training field (L-STF), a legacy long training field (L-LTF) and a legacy signal field (L-SIG).
9. A wireless communication method of a terminal, the method comprising:
receiving a first preamble of a wireless packet; and
receiving a second preamble of the wireless packet according to an identified configuration of the second preamble,
wherein the configuration of the second preamble is identified based at least in part on a detected constellation of a specific symbol of the second preamble,
wherein when the detected constellation of the specific symbol is a first constellation, the second preamble includes a high efficiency signal A field (HE-SIG-A) composed of four symbols, and
wherein when the detected constellation of the specific symbol is a second constellation, the second preamble includes an HE-SIG-A composed of two symbols and a high efficiency signal B field (HE-SIG-B).
10. The wireless communication method of claim 9 ,
wherein when the second preamble includes an HE-SIG-A composed of four symbols, a first symbol and a second symbol of the HE-SIG-A have same data, and a third symbol and a fourth symbol of the HE-SIG-A have same data.
11. The wireless communication method of claim 9 ,
wherein when the detected constellation of the specific symbol is the first constellation, the HE-SIG-A is immediately followed by a high efficiency short training field (HE-STF) of the second preamble.
12. The wireless communication method of claim 9 ,
wherein when the detected constellation of the specific symbol is the second constellation, the second preamble includes an HE-SIG-A composed of two symbols immediately followed by the HE-SIG-B.
13. The wireless communication method of claim 9 ,
wherein the specific symbol is a third symbol after a legacy signal field (L-SIG) of the first preamble.
14. The wireless communication method of claim 9 ,
wherein the second preamble includes a repeated L-SIG (RL-SIG) composed of a first symbol of the second preamble, and
wherein the specific symbol is a second symbol after the RL-SIG.
15. The wireless communication method of claim 9 ,
wherein the first constellation is quadrature binary phase shift keying (QBPSK) and the second constellation is binary phase shift keying (BPSK).
16. The wireless communication method of claim 9 ,
wherein the first preamble includes a legacy short training field (L-STF), a legacy long training field (L-LTF) and a legacy signal field (L-SIG).