Physical layer protocol data unit directional transmission
An access point (AP) device that serves a wireless local area network (WLAN) determines that a coverage area of the AP device is partitioned into a plurality of sectors, the coverage area corresponding to the WLAN. The AP device determines that a first transmission is occurring within a first sector among the plurality of sectors, and determines that a client station is located in a second sector among the plurality of sectors, the second sector different than the first sector. In response to determining that the first transmission is occurring within the first sector, the AP device selects the client station for a directional second transmission in a direction i) within the second sector and ii) outside of the first sector, and transmits the directional second transmission to the client station in the second sector while the first transmission in the first sector is occurring.
1 . A method for full-duplex communication in a wireless local area network (WLAN) that includes an access point (AP) device that serves the WLAN, the AP device having a plurality of directional antennas, wherein a first subset of one or more directional antennas among the plurality of directional antennas corresponds to a first sector among a plurality of sectors of a coverage area of the AP device, a second subset of one or more directional antennas among the plurality of directional antennas corresponds to a second sector among the plurality of sectors, the second sector different than the first sector, and a third subset of one or more directional antennas among the plurality of directional antennas corresponds to a third sector among the plurality of sectors, the third sector different than the first sector and the second sector, the third sector spatially overlapping the second sector, the method comprising:
determining, at the AP device that the coverage area of the AP device is partitioned into the plurality of sectors, the coverage area corresponding to the WLAN;
determining, at the AP device, that a first transmission is occurring within the first sector, the first transmission by a first client station of the WLAN and addressed to the AP device;
determining, at the AP device, that a second client station of the WLAN is located in the second sector;
in response to determining that the first transmission is occurring within the first sector, selecting, at the AP device, the second client station for a directional second transmission in a direction i) within the second sector and ii) outside of the first sector;
receiving, by the AP device, the first transmission from the first client station in the first sector, including receiving the first transmission via the first subset of one or more directional antennas; and
transmitting, by the AP device, the directional second transmission to the second client station in the second sector while the AP device is receiving the first transmission in the first sector as part of a full-duplex communication operation, including:
transmitting the directional second transmission via the second subset of one or more directional antennas, and
transmitting the directional second transmission via the third subset of one or more directional antennas.
2 . The method of claim 1 , wherein for each of at least some pairs of sectors in the plurality of sectors, one sector of the pair spatially overlaps with another sector of the pair.
3 . The method of claim 1 , wherein determining that the second client station is located in the second sector comprises:
as part of an association procedure in which the AP device transmits a beacon, receiving, at the AP device, a packet from the second client station that is responsive to the beacon;
measuring, at the AP device, one or more received energy levels corresponding to the packet in one or more respective sectors; and
determining that the second client station is located in the second sector based on the one or more received energy levels.
4 . The method of claim 3 , wherein the association procedure further comprises:
transmitting, by the AP device, the beacon in multiple ones of the sectors.
5 . The method of claim 1 , further comprising, after transmitting the directional second transmission to the second client station in the second sector:
determining, at the AP device, that the second client station has moved to a third sector among the plurality of sectors, the third sector different than the second sector; and
transmitting, by the AP device, a directional third transmission to the second client station in the third sector.
6 . A wireless communication device for communicating in a wireless local area network (WLAN), the wireless communication device comprising:
a plurality of directional antennas, wherein a first subset of one or more directional antennas among the plurality of directional antennas corresponds to a first sector among a plurality of sectors of a coverage area of an access point (AP) device that serves the WLAN, a second subset of one or more directional antennas among the plurality of directional antennas corresponds to a second sector among the plurality of sectors, the second sector different than the first sector, and a third subset of one or more directional antennas among the plurality of directional antennas corresponds to a third sector among the plurality of sectors, the third sector different than the first sector and the second sector, the third sector spatially overlapping the second sector,
a wireless network interface associated with the AP device that serves the WLAN, the wireless network interface having circuitry configured to:
determine that the coverage area of the AP device is partitioned into the plurality of sectors, the coverage area corresponding to the WLAN,
determine that a first transmission is occurring within the first sector, the first transmission by a first client station of the WLAN and addressed to the AP device,
determine that a second client station of the WLAN is located in the second sector,
in response to determining that the first transmission is occurring within the first sector, select the second client station for a directional second transmission in a direction i) within the second sector and ii) outside of the first sector,
receive the first transmission from the first client station in the first sector, including receiving the first transmission via the first subset of one or more directional antennas, and
control the wireless network interface to transmit the directional second transmission to the second client station in the second sector while the AP device is receiving the first transmission in the first sector as part of a full-duplex communication operation, including controlling the wireless network interface to transmit the directional second transmission via the second subset of one or more directional antennas and via the third subset of one or more directional antennas.
7 . The wireless communication device of claim 6 , wherein for each of at least some pairs of sectors in the plurality of sectors, one sector of the pair spatially overlaps with another sector of the pair.
8 . The wireless communication device of claim 6 , wherein the circuitry is further configured to determine that the second client station is located in the second sector at least by:
as part of an association procedure in which the AP device transmits a beacon, receiving a packet from the second client station that is responsive to the beacon;
measuring one or more received energy levels corresponding to the packet in one or more respective sectors; and
determining that the second client station is located in the second sector based on the one or more received energy levels.
9 . The wireless communication device of claim 8 , wherein the circuitry is further configured to, as part of the association procedure:
control the wireless network interface to transmit the beacon in multiple ones of the sectors.
10 . The wireless communication device of claim 6 , wherein the circuitry is further configured to, after the wireless network interface transmits the directional second transmission to the second client station in the second sector:
determine that the second client station has moved to a third sector among the plurality of sectors, the third sector different than the second sector; and
control the wireless network interface to transmit a directional third transmission to the second client station in the third sector.
11 . The wireless communication device of claim 6 , wherein wireless network interface comprises:
one or more transceivers configured to i) receive the first transmission while transmitting the directional second transmission.
12 . The wireless communication device of claim 11 , further comprising:
a host processor coupled to the wireless network interface.