Apparatus and methods for EHT multi-link BBS parameter update
Embodiments of the present invention provide apparatus and methods for announcing a BSS parameter updates for a wireless link that can be received by a MLD even when the MLD is not listening for parameter updates on that specific link by employing a different wireless link to broadcast, receive, and/or signal the BSS parameter update. An MLD can update the BSS parameters of the wireless link and use the wireless link according to the updated BSS parameters (e.g., after performing a channel switch). According to some embodiments, an STA within an AP MLD transmits an information elements (IE) including BSS parameter updates associated with a different STA (operating on a different wireless link) within the AP MLD.
1. A method of transmitting data over a wireless network, the method comprising:
at a first wireless station (STA) of an access point (AP) multi-link device (MLD), wirelessly transmitting a beacon frame to a first STA of a non-AP MLD over a first wireless link of the wireless network, wherein a second wireless link of the wireless network carries communication between a second STA of the non-AP MLD and a second STA of the AP MLD, and wherein the beacon frame comprises: a first change sequence field associated with the first wireless link; and a second change sequence field associated with the second wireless link, wherein the first change sequence field or the second change sequence field is incremented when a critical update occurs to operational parameters of the respective wireless link; and
at the second STA of the AP MLD, wirelessly communicating with the second STA of the non-AP MLD over the second wireless link according to the critical update.
2. The method as described in claim 1 , wherein the BSS parameter update is carried in an Extended Channel Switch Announcement (ECSA) information element (IE) of a multi-link information IE.
3. The method as described in claim 1 , wherein the BSS parameter update comprises: a beacon interval; and a timing synchronization function (TSF) offset between the first wireless link and the second wireless link for performing a channel switch on the second wireless link.
4. The method as described in claim 1 , wherein the BSS parameter update comprises: a new channel number; and a channel switch count for performing a channel switch on the second wireless link.
5. The method as described in claim 1 , wherein the second STA of the non-AP MLD is operable to pause a transmission over the second wireless link until a beacon frame comprising an Extended Channel Switch Announcement (ECSA) information element (IE) having a Channel Switch Count set to 0 is received by the second STA of the non-AP MLD.
6. The method as described in claim 1 , wherein the BSS parameter update comprises a BSS color change, and further comprising disabling a BSS color of the wireless network until the BSS color change is complete.
7. The method as described in claim 1 , wherein the BSS parameter update comprises a change sequence number, wherein a change in a value of the change sequence number indicates a critical update for the second wireless link.
8. The method as described in claim 7 , wherein the critical update comprises at least one of: an Extended Channel Switch Announcement (ECSA); a BSS Color Change Announcement; an EDCA (Enhanced Distributed Channel Access) parameter modification; a multi-user (MU) EDCA Parameter Set element; and a Modification of a Spatial Reuse Parameter Set element.
9. The method as described in claim 1 , wherein the BSS parameter update comprises a change sequence number, wherein a change in a value of the change sequence number causes the second STA of the non-MLD to enter an awake state.
10. A method of transmitting data over a wireless network, the method comprising:
at a first wireless station (STA) of an non-access point (AP) multi-link device (MLD), accessing a beacon frame transmitted by a first STA of an AP MLD, wherein the first STA of the non-AP MLD and first STA of the AP MLD communicate wirelessly over a first wireless link, wherein a second wireless link carries communication between a second STA of the non-AP MLD and a second STA of the AP MLD, and wherein the beacon frame comprises: a first change sequence field associated with the first wireless link; and a second change sequence field associated with the second wireless link, wherein the first change sequence field or the second change sequence field is incremented when a critical update occurs to operational parameters of the respective wireless link; and
at the second STA of the non-AP MLD, wirelessly communicating with the second STA of the AP MLD over the second wireless link according to the critical update.
11. The method as described in claim 10 , wherein the BSS parameter update is carried in an Extended Channel Switch Announcement (ECSA) information element (IE) of a multi-link information IE.
12. The method as described in claim 10 , wherein the BSS parameter update comprises: a beacon interval; and a timing synchronization function (TSF) offset between the first wireless link and the second wireless link for performing a channel switch on the second wireless link.
13. The method as described in claim 10 , wherein the BSS parameter update comprises: a new channel number; and a channel switch count for performing a channel switch on the second wireless link.
14. The method as described in claim 10 , wherein the second STA of the non-AP MLD is operable to pause a transmission over the second wireless link until a beacon frame comprising an Extended Channel Switch Announcement (ECSA) information element (IE) having a Channel Switch Count set to 0 is received by the second STA of the non-AP MLD.
15. The method as described in claim 10 , wherein the BSS parameter update comprises a BSS color change, and further comprising disabling a BSS color of the wireless network until the BSS color change is complete.
16. The method as described in claim 10 , wherein the BSS parameter update comprises a change sequence number, wherein a change in a value of the change sequence number indicates a critical update for the second wireless link.
17. The method as described in claim 16 , wherein the critical update comprises at least one of: an Extended Channel Switch Announcement (ECSA); a BSS Color Change Announcement; an EDCA parameter modification; a multi-user (MU) EDCA Parameter Set element; and a Modification of a Spatial Reuse Parameter Set element.
18. The method as described in claim 10 , wherein the BSS parameter update comprises a change sequence number, wherein a change in a value of the change sequence number causes the second STA of the non-MLD to enter an awake state.
19. An access point (AP) multi-link device (MLD) for transmitting data over a wireless network, the apparatus comprising:
a first transceiver and a second transceiver configured to send and receive data over the wireless network;
a memory for storing data; and
a processor operable to:
wirelessly transmit a beacon frame to a first STA of a non-AP MLD over a first wireless link of the wireless network using the first transceiver, wherein a second STA of the non-AP MLD and a second STA of the AP MLD communicate wirelessly over a second wireless link of the wireless network using the second transceiver, and wherein the beacon frame comprises: a first change sequence field associated with the first wireless link; and a second change sequence field associated with the second wireless link, wherein the first change sequence field or the second change sequence field is incremented when a critical update occurs to operational parameters of the respective wireless link; and
wirelessly communicate with the second STA of the non-AP MLD over the second wireless link using the second transceiver according to the critical update.
20. The apparatus as described in claim 19 , wherein the BSS parameter update is carried in a management frame.