Controlling transmission of group-addressed data
In some examples, a first wireless device sends, to a second wireless device, a control indication that controls transmission of group-addressed data between the first wireless device and the second wireless device over a wireless local area network (WLAN).
1. A method comprising:
broadcasting, by a first wireless device, a first broadcast request message including information about a plurality of streams of data the first wireless device is advertising to send in one or more group-addressed transmissions;
receiving, by the first wireless device in response to the broadcast request message, a broadcast response message from an access point (AP), the broadcast response message including one or more stream indicators that indicate which of the plurality of streams of data the AP has chosen to receive; and
in response to receiving the broadcast response message, sending, by the first wireless device in an uplink, one or more group-addressed transmissions of the chosen streams of data.
2. The method of claim 1 , further comprising:
sending, by the first wireless device to a second wireless device, a control indication that controls transmission of group-addressed data between the first wireless device and the second wireless device over a wireless local area network (WLAN); and
receiving, by the first wireless device from the second wireless device in response to the control indication, a response indication comprising timing information relating to a timing for the transmission of group-addressed data.
3. The method of claim 1 , further comprising receiving, by the first wireless device from the AP, a stop request message to stop the transmission of one or more of the group-addressed transmissions of the chosen streams of data.
4. The method of claim 1 , further comprising:
receiving, by the first wireless device, group-addressed data in a downlink from the AP.
5. The method of claim 4 , wherein group-addressed data is synchronized to a power save state of the first wireless device.
6. The method of claim 1 , further comprising:
receiving, by the first wireless device from the AP, a key for encrypting or decrypting group-addressed data, wherein the key is associated with a group of wireless devices, and wherein different groups of wireless devices are associated with different keys for data encryption or data decryption.
7. The method of claim 6 , wherein the key is further associated with a first stream in the group-addressed data, and wherein different streams in the group-addressed data are associated with different keys for data encryption or data decryption.
8. The method of claim 6 , wherein the key is included in an advertisement broadcast by the AP.
9. The method of claim 8 , wherein the advertisement further identifies one or more streams in group-addressed data.
10. The method of claim 1 , wherein the broadcast response message comprises a group-addressed destination address and a group-addressed Basic Service Set Identifier (BSSID).
11. The method of claim 1 , wherein the group-addressed transmissions of the chosen streams of data comprise a transmission of more than one frame.
12. The method of claim 1 , wherein the broadcast request message comprises a group-addressed destination address.
13. The method of claim 1 , wherein the broadcast request message comprises a group-addressed Basic Service Set Identifier (BSSID).
14. The method of claim 1 , wherein the broadcast request message is sent by the first wireless device to the AP in-band or out-of-band.
15. The method of claim 1 , wherein each of the group-addressed transmissions comprise a header including a source Medium Control Access (MAC) address of the first wireless device, a destination group address, and a group-addressed Basic Service Set Identifier (BSSID).
16. A non-transitory machine-readable storage medium comprising instructions that upon execution cause an access point (AP) to:
receive, from a first wireless device, a broadcast request message including information about a plurality of streams of data the first wireless device is advertising to send in group-addressed transmissions;
in response to receiving the broadcast request message, send a broadcast response message to the first wireless device, the broadcast response message including one or more stream indicators that indicate which of the plurality of streams of data the AP has chosen to receive; and
receive in an uplink, in response to the broadcast response message, one or more group-addressed transmissions of the chosen streams of data.
17. The non-transitory machine-readable storage medium of claim 16 , wherein the broadcast response message is unicast to the first wireless device to the AP, and the broadcast request message is broadcast by the first wireless device to a plurality of APs.
18. The non-transitory machine-readable storage medium of claim 16 , wherein the instructions upon execution cause the AP to:
send, to the first wireless device, a stop request message to
stop the transmission of one or more of the group-addressed transmissions of the chosen streams of data.
19. A first wireless device comprising:
a communication interface to communicate over a wireless local area network (WLAN); and
at least one processor configured to:
broadcast a broadcast request message including information about a plurality of streams of data the first wireless device is advertising to send in one or more group-addressed transmissions;
receive, in response to the broadcast request message, a broadcast response message from an access point (AP), the broadcast response message including one or more stream indicators that indicate which of the plurality of streams of data the AP has chosen to receive; and
in response to receiving the broadcast response message, send in an uplink one or more group-addressed transmissions of the chosen streams of data.
20. The first wireless device of claim 19 , wherein the at least one processor is configured to:
send, to a second wireless device, a control indication that controls transmission of group-addressed data between the first wireless device and the second wireless device over a wireless local area network (WLAN), and
receive, by the first wireless device from the second wireless device in response to the control indication, a response indication regarding the transmission of group-addressed data.
21. The first wireless device of claim 19 , wherein the broadcast request message comprises a group-addressed destination address and a group addressed Basic Service Set Identifier (BSSID).