Method and device for configuring NGV frame for wideband transmission in wireless LAN system
A method and device for transmitting an NGV frame in a wireless LAN system is proposed. Specifically, a transmission device generates an NGV frame and transmits the NGV frame through a first band. The NGV frame includes an L-STF, an L-LTF, an L-SIG, an NGV-SIG, an NGV-STF, an NGV-LTF, and NGV-Data. The L-STF, the L-LTF, the L-SIG, and the NGV-SIG are duplicated in units of second bands and transmitted through the first band. The NGV-STF, the NGV-LTF, and the NGV-Data are transmitted through a full band of the first band. The first band is a 20 MHz band, and a second band is a 10 MHz band.
1. A method for transmitting a New Generation Vehicular (NGV) frame in a wireless local area network (WLAN) system, the method comprising:
generating, by a transmitting device, the NGV frame; and
transmitting, by the transmitting device, the NGV frame to a receiving device through a first band,
wherein the NGV frame includes Legacy-Short Training Field (L-STF), Legacy-Long Training Field (L-LTF), Legacy-Signal (L-SIG), Repeated Legacy (RL)-SIG, NGV-SIG, NGV-STF, NGV-LTF, and NGV-Data,
wherein the L-SIG, the RL-SIG and the NGV-SIG are duplicated in units of a second band and transmitted through the first band,
wherein the NGV-STF and the NGV-LTF are transmitted through a full band of the first band,
wherein a subcarrier frequency spacing of the NGV-STF, the NGV-LTF and the NGV-Data is half of a subcarrier frequency spacing of a Very High Throughput (VHT) physical (PHY),
wherein the first band is a 20 MHz band, and
wherein the second band is a 10 MHz band.
2. The method of claim 1 ,
wherein the NGV frame includes a legacy part, the NGV-SIG, and an NGV part,
wherein the legacy part includes the L-STF, the L-LTF, the L-SIG, and the RL-SIG,
wherein the NGV part includes the NGV-STF, the NGV-LTF, and the NGV-Data,
wherein the legacy part and the NGV-SIG are generated by performing 2× DownClocking (DC) on a frame format for a 20 MHz band defined in a first WLAN system,
wherein the NGV part is generated by performing 2× DownClocking (DC) on a frame format for a 40 MHz band defined in a second WLAN system,
wherein the first WLAN system supports an 802.11a PHY, and
wherein the second WLAN system supports the VHT PHY.
3. The method of claim 2 , wherein the NGV part has an Orthogonal Frequency Division Multiplexing (OFDM) numerology having a same symbol length as the legacy part, or has an OFDM numerology having a symbol length 2 times longer than the legacy part.
4. The method of claim 2 , wherein Automatic Gain Control (AGC) estimation information of the NGV part is obtained based on AGC estimation information being obtained based on the L-STF, and
wherein channel estimation information of the NGV part is obtained based on channel estimation information being obtained based on the L-LTF.
5. The method of claim 2 , wherein the RL-SIG is used for extending a signal range and for performing packet classification, and
wherein the packet classification information is information classifying a legacy frame and the NGV frame.
6. The method of claim 2 , wherein the RL-SIG or the NGV-SIG is modulated based on Quadrature-Binary Phase Shift Keying (Q-BPSK).
7. The method of claim 2 , wherein an extra tone is added to the L-SIG and the RL-SIG,
wherein the extra tone is used for performing channel estimation of the legacy part and the NGV part, and
wherein tone indexes of the extra tone are −28, −27, 27, 28.
8. A transmitting device for transmitting a New Generation Vehicular (NGV) frame in a wireless local area network (WLAN) system, the transmitting device comprising:
a memory;
a transceiver; and
a processor being operatively connected to the memory and the transceiver,
wherein the processor is configured to:
generate the NGV frame, and
transmit the NGV frame to a receiving device through a first band,
wherein the NGV frame includes Legacy-Short Training Field (L-STF), Legacy-Long Training Field (L-LTF), Legacy-Signal (L-SIG), Repeated Legacy (RL)-SIG, NGV-SIG, NGV-STF, NGV-LTF, and NGV-Data,
wherein the L-SIG, the RL-SIG and the NGV-SIG are duplicated in units of a second band and transmitted through the first band,
wherein the NGV-STF and the NGV-LTF are transmitted through a full band of the first band,
wherein a subcarrier frequency spacing of the NGV-STF, the NGV-LTF and the NGV-Data is half of a subcarrier frequency spacing of a Very High Throughput (VHT) physical (PHY),
wherein the first band is a 20 MHz band, and
wherein the second band is a 10 MHz band.
9. The transmitting device of claim 8 , wherein the NGV frame further includes Repeated Legacy (RL)-SIG,
wherein the RL-SIG is duplicated in units of the second band and transmitted through the first band,
wherein the NGV frame includes a legacy part, the NGV-SIG, and an NGV part,
wherein the legacy part includes the L-STF, the L-LTF, the L-SIG, and the RL-SIG,
wherein the NGV part includes the NGV-STF, the NGV-LTF, and the NGV-Data,
wherein the legacy part and the NGV-SIG are generated by performing 2× DownClocking (DC) on a frame format for a 20 MHz band defined in a first WLAN system,
wherein the NGV part is generated by performing 2× DownClocking (DC) on a frame format for a 40 MHz band defined in a second WLAN system,
wherein the first WLAN system supports an 802.11a PHY, and
wherein the second WLAN system supports the VHT PHY.
10. The transmitting device of claim 9 , wherein the NGV part has an Orthogonal Frequency Division Multiplexing (OFDM) numerology having a same symbol length as the legacy part, or has an OFDM numerology having a symbol length 2 times longer than the legacy part.
11. The transmitting device of claim 9 , wherein Automatic Gain Control (AGC) estimation information of the NGV part is obtained based on AGC estimation information being obtained based on the L-STF, and
wherein channel estimation information of the NGV part is obtained based on channel estimation information being obtained based on the L-LTF.
12. The transmitting device of claim 9 , wherein the RL-SIG is used for extending a signal range and for performing packet classification, and
wherein the packet classification information is information classifying a legacy frame and the NGV frame.
13. The transmitting device of claim 9 , wherein the RL-SIG or the NGV-SIG is modulated based on Quadrature-Binary Phase Shift Keying (Q-BPSK).
14. The transmitting device of claim 9 , wherein an extra tone is added to the L-SIG and the RL-SIG,
wherein the extra tone is used for performing channel estimation of the legacy part and the NGV part, and
wherein tone indexes of the extra tone are −28, −27, 27, 28.
15. A method for receiving a New Generation Vehicular (NGV) frame in a wireless local area network (WLAN) system, the method comprising:
receiving the NGV frame, by a receiving device, from a transmitting device through a first band; and
decoding, by the receiving device, the NGV frame,
wherein the NGV frame includes Legacy-Short Training Field (L-STF), Legacy-Long Training Field (L-LTF), Legacy-Signal (L-SIG), Repeated Legacy (RL)-SIG, NGV-SIG, NGV-STF, NGV-LTF, and NGV-Data,
wherein the L-SIG, the RL-SIG and the NGV-SIG are duplicated in units of a second band and transmitted through the first band,
wherein the NGV-STF and the NGV-LTF are transmitted through a full band of the first band,
wherein a subcarrier frequency spacing of the NGV-STF, the NGV-LTF and the NGV-Data is half of a subcarrier frequency spacing of a Very High Throughput (VHT) physical (PHY),
wherein the first band is a 20 MHz band, and
wherein the second band is a 10 MHz band.