Wireless communication method and wireless communication terminal using basic service set identification information determination of received frame
The present invention relates to a wireless communication method and a wireless communication terminal using a determination of basic service set identification information of a received frame, and more particularly, to a wireless communication method and a wireless communication terminal for performing an operation according to a determination result whether the received frame is an intra-BSS frame or an inter-BSS frame. To this end, provided are a wireless communication terminal including a processor and a communication unit, wherein the processor receives a wireless frame through the communication unit, when the received frame is a VHT PPDU, extracts partial association ID (AID) information and group ID information from a preamble of the VHT PPDU, when the extracted group ID information is equal to a predetermined value, checks whether at least some information of the extracted partial AID matches a partial basic service set (BSS) color announced to the terminal, and determines whether the received frame is an intra-BSS frame or an inter-BSS frame according to whether at least some information of the partial AID matches the partial BSS color and a wireless communication method using the same.
1. A base wireless communication terminal operating a basic service set (BSS), the base wireless communication terminal comprising:
a processor; and
a communication unit,
wherein the processor is configured to:
assign an association ID (AID) of a terminal which is associated with the base wireless communication terminal, and
transmit information on the AID to the terminal,
wherein when the base wireless communication terminal applies an AID assignment rule in which partial BSS color bits are used, predetermined N-bit(s) of the AID assigned to the terminal is determined based on a value obtained by subtracting an N-bit value based on a BSSID of the BSS from a partial BSS color value of a BSS color of the BSS.
2. The base wireless communication terminal of claim 1 , wherein the partial BSS color value is a value of the least significant N-bit(s) or the most significant N-bit(s) of the BSS color, and the N-bit value based on the BSSID is a value of exclusive OR of a first predetermined N-bit(s) of the BSSID and a second predetermined N-bit(s) of the BSSID.
3. The base wireless communication terminal of claim 1 , wherein the N is 4.
4. The base wireless communication terminal of claim 1 , wherein the AID assignment rule is as the following equation,
AID(8 −N+ 1:8)=bin[(dec( BCB (0: N− 1))−dec(BSSID(47 −N+ 1:47) XOR BSSID(43 −N+ 1:43)))mod 2{circumflex over ( )} N,N ]
Herein, the BCB is the BSS color, the BSSID is a BSS identifier, and N=4.
5. The base wireless communication terminal of claim 1 , wherein when the base wireless communication terminal transmits a very high throughput (VHT) PHY protocol data unit (PPDU) to the terminal, the processor is configured to:
set a partial AID using the AID of the terminal and a K-bit value based on the BSSID, and
transmit information of the partial AID by containing it into a preamble of the VHT PPDU.
6. The base wireless communication terminal of claim 5 , wherein predetermined bit(s) of the partial AID of the VHT PPDU represent the partial BSS color value where the K-bit value is deducted by the N-bit value based on the BSSID of the BSS.
7. A wireless communication method of a base wireless communication terminal operating a basic service set (BSS), the method comprising:
assigning an association ID (AID) of a terminal which is associated with the base wireless communication terminal; and
transmitting information on the AID to the terminal,
wherein when the base wireless communication terminal applies an AID assignment rule in which partial BSS color bits are used, predetermined N-bit(s) of the AID assigned to the terminal is determined based on a value obtained by subtracting an N-bit value based on a BSSID of the BSS from a partial BSS color value of a BSS color of the BSS.
8. The wireless communication method of claim 7 , wherein the partial BSS color value is a value of the least significant N-bit(s) or the most significant N-bit(s) of the BSS color, and the N-bit value based on the BSSID is a value of exclusive OR of a first predetermined N-bit(s) of the BSSID and a second predetermined N-bit(s) of the BSSID.
9. The wireless communication method of claim 7 , wherein the N is 4.
10. The wireless communication method of claim 7 , wherein the AID assignment rule is as the following equation,
AID(8 −N+ 1:8)=bin[(dec( BCB (0: N− 1))−dec(BSSID(47 −N+ 1:47) XOR BSSID(43 −N+ 1:43)))mod 2{circumflex over ( )} N,N ]
Herein, the BCB is the BSS color, the BSSID is a BSS identifier, and N=4.
11. The wireless communication method of claim 7 , wherein when the base wireless communication terminal transmits a very high throughput (VHT) PHY protocol data unit (PPDU) to the terminal, the method further comprising:
setting a partial AID using the AID of the terminal and a K-bit value based on the BSSID; and
transmitting information of the partial AID by containing it into a preamble of the VHT PPDU.
12. The wireless communication method of claim 11 , wherein predetermined bit(s) of the partial AID of the VHT PPDU represent the partial BSS color value where the K-bit value is deducted by the N-bit value based on the BSSID of the BSS.
13. A terminal, the terminal comprising:
a processor; and
a communication unit,
wherein the processor is configured to:
receive information on an association ID (AID) of the terminal assigned by a base wireless communication terminal with which the terminal is associated, and
perform a communication in a basic service set (BSS) operated by the base wireless communication terminal by using the assigned AID,
wherein when the base wireless communication terminal applies an AID assignment rule in which partial BSS color bits are used, predetermined N-bit(s) of the AID assigned to the terminal is determined based on a value obtained by subtracting an N-bit value based on a BSSID of the BSS from a partial BSS color value of a BSS color of the BSS.
14. The terminal of claim 13 , wherein the partial BSS color value is a value of the least significant N-bit(s) or the most significant N-bit(s) of the BSS color, and the N-bit value based on the BSSID is a value of exclusive OR of a first predetermined N-bit(s) of the BSSID and a second predetermined N-bit(s) of the BSSID.
15. The terminal of claim 13 , wherein the N is 4.
16. The terminal of claim 13 , wherein the AID assignment rule is as the following equation,
AID(8 −N+ 1:8)=bin[(dec( BCB (0: N− 1))−dec(BSSID(47 −N+ 1:47) XOR BSSID(43 −N+ 1:43)))mod 2{circumflex over ( )} N,N ]
Herein, the BCB is the BSS color, the BSSID is a BSS identifier, and N=4.
17. A wireless communication method of a terminal, the method comprising:
receiving information on an association ID (AID) of the terminal assigned by a base wireless communication terminal with which the terminal is associated; and
performing a communication in a basic service set (BSS) operated by the base wireless communication terminal by using the assigned AID,
wherein when the base wireless communication terminal applies an AID assignment rule in which partial BSS color bits are used, predetermined N-bit(s) of the AID assigned to the terminal is determined based on a value obtained by subtracting an N-bit value based on a BSSID of the BSS from a partial BSS color value of a BSS color of the BSS.