Method and apparatus for transmitting and receiving frame including partial association identifier in wireless LAN system
A method and apparatus for transmitting and receiving a frame including a partial association ID (PAID) in a wireless LAN (WLAN) system are disclosed. A method for receiving a frame at a station (STA) from an access point (AP) of a wireless communication system including: determining whether a value of a partial association ID (Partial AID) of the frame is calculated on the basis of an association ID (AID) allocated to the STA by the AP and a basic service set ID (BSSID) of the AP; and decoding the frame, if the value of the partial AID of the frame is calculated on the basis of the AID allocated to the STA and the BSSID of the AP, wherein the AID is allocated such that the partial AID value calculated on the basis of the AID allocated to the STA and the BSSID of the AP is not identical to a first PAID value calculated by applying a modulo operation to a specific value obtained by converting values ranging from a 40 th bit position to a 48 th bit position from among 48 bit positions of the BSSID of the AP into a decimal number.
1. A method of transmitting a frame to a station (STA) in a wireless communication system, the method performed by an access point (AP) and comprising:
allocating, by the AP, an association identifier (AID) to the STA; and
transmitting, by the AP, a downlink frame including a partial AID (PAID) of the STA which is obtained by using the allocated AID,
wherein in the allocation of the AID, the AP excludes a predetermined AID value which makes the PAID to be ‘BSSID[39:47]mod(2 9 −1)+1’, where ‘BSSID’ denotes either an ID of a basic service set (BSS) to which AP belongs or an ID of an overlapping BSS (OBSS).
2. The method of claim 1 , wherein the PAID of the STA is ‘(AID[0:8]+2 5 ×BSSID[44:47] XOR BSSID[40:43])mod 2 9 ’.
3. The method of claim 1 , wherein the AP allocates the AID such that the PAID of the STA is not identical to zero.
4. The method of claim 1 , wherein the downlink frame corresponds to a single user physical layer protocol data unit (SU PPDU).
5. The method of claim 1 , wherein the PAID is included in a signal (SIG) field of the downlink frame.
6. The method of claim 1 , further comprising:
receiving a uplink frame including a PAID corresponding to ‘BSSID[39:47]mod(2 9 −1)+1’.
7. An access point (AP) comprising:
a processor to allocate an association identifier (AID) to a station (STA); and
a transmitter to transmitt a downlink frame including a partial AID (PAID) of the STA which is obtained by using the allocated AID,
wherein in the allocation of the AID, the processor excludes a predetermined AID value which makes the PAID to be ‘BSSID[39:47]mod(2 9 −1)+1’, where ‘BSSID’ denotes either an ID of a basic service set (BSS) to which AP belongs or an ID of an overlapping BSS (OBSS), and ‘dec( )’ denotes a decimal conversion.
8. The AP of claim 7 , wherein the PAID of the STA is ‘(AID[0:8]+2 5 ×BSSID[44:47] XOR BSSID[40:43])mod 2 9 ’.
9. The AP of claim 7 , wherein the AP allocates the AID such that the PAID of the STA is not identical to zero.
10. The AP of claim 7 , wherein the downlink frame corresponds to a single user physical layer protocol data unit (SU PPDU).
11. The AP of claim 7 , wherein the PAID is included in a signal (SIG) field of the downlink frame.
12. The AP of claim 7 , further comprising:
a receiver to receive a uplink frame including a PAID corresponding to ‘BSSID[39:47]mod(2 9 −1)+1’.