Wireless local area network make-before-break handover
Certain aspects of the present disclosure provide A method for wireless communication at a first wireless station, generally including communicating, via a first link, with a first access point (AP) affiliated with a multi-link device (MLD), enabling a second link with a second AP affiliated with the MLD, communicating, during a handover of the first wireless station from the first AP to the second AP, with the first AP via the first link and with the second AP via the second link, and disabling the first link with the first AP after completion of the handover.
1 . A wireless station, comprising:
at least one transceiver;
at least one memory comprising processor-executable instructions; and
one or more processors configured to execute the processor-executable instructions to cause the wireless station to:
communicate, via the at least one transceiver and a first link, with a first access point (AP) affiliated with a multi-link device (MLD);
receive, via the at least one transceiver, signaling from the first AP instructing the wireless station to enable a second link with a second AP that is non-collocated with the first AP;
enable the second link with the second AP after the signaling from the first AP is received;
communicate, via the at least one transceiver during a handover of the wireless station from the first AP to the second AP, with the first AP via the first link and with the second AP via the second link, wherein:
the handover triggers packet duplication on the first link and second link; and
to communicate, during the handover, the one or more processors are configured to cause the wireless station to at least one of:
receive, based on the triggered packet duplication, duplicate first packets via both the first link and the second link; or
transmit, based on the triggered packet duplication, duplicate second packets via both the first link and second link; and
disable the first link with the first AP after completion of the handover.
2 . The wireless station of claim 1 , wherein the second link is a member of an associated link set when the second link is enabled.
3 . The wireless station of claim 2 , wherein the one or more processors are further configured to cause the wireless station to:
add, to the associated link set, a third link associated with a third AP affiliated with the MLD; or
remove, from the associated link set, a fourth link associated with a fourth AP affiliated with the MLD.
4 . The wireless station of claim 3 , wherein the one or more processors are further configured to cause the wireless station to:
receive, via the at least one transceiver, a beacon from the first AP; and
identify at least the second AP and third AP based on information in the beacon.
5 . The wireless station of claim 1 , wherein:
the one or more processors are further configured to cause the wireless station to transmit, via the at least one transceiver, signaling to the first AP to initiate the handover; and
to enable the second link, the one or more processors are configured to cause the wireless station to enable the second link after the signaling to initiate the handover is transmitted.
6 . The wireless station of claim 1 , wherein:
the one or more processors are further configured to cause the wireless station to receive, via the at least one transceiver, signaling from the second AP that instructs the wireless station to disable the first link; and
to disable the first link, the one or more processors are configured to cause the wireless station to disable the first link after the signaling that instructs the wireless station to disable the first link is received.
7 . A method for wireless communication by a wireless node, comprising:
communicating, via a first link, with a first access point (AP) affiliated with a multi-link device (MLD);
receiving signaling from the first AP that instructs the wireless node to enable a second link with a second AP that is non-collocated with the first AP;
enabling the second link with the second AP after the signaling from the first AP is received;
communicating, during a handover of the wireless node from the first AP to the second AP, with the first AP via the first link and with the second AP via the second link, wherein:
the handover triggers packet duplication on the first link and second link
the communicating, during the handover, comprises at least one of:
receiving, based on the triggered packet duplication, duplicate first packets via both the first link and the second link; or
transmitting, based on the triggered packet duplication, duplicate second packets via both the first link and second link; and
disabling the first link with the first AP after completion of the handover.
8 . The method of claim 7 , wherein the second link is a member of an associated link set when the second link is enabled.
9 . The method of claim 8 , further comprising:
adding, to the associated link set, a third link associated with a third AP affiliated with the MLD; or
removing, from the associated link set, a fourth link associated with a fourth AP affiliated with the MLD.
10 . The method of claim 9 , further comprising:
receiving a beacon from the first AP; and
identifying at least the second AP and third AP based on information in the beacon.
11 . The method of claim 7 , further comprising transmitting signaling to the first AP initiating the handover, wherein enabling the second link comprises enabling the second link after transmitting the signaling.
12 . The method of claim 7 , further comprising receiving signaling from the second AP indicating the wireless node is to disable the first link, wherein disabling the first link comprises disabling the first link after receiving the signaling.