Multi-link wireless communications connections
A method includes establishing a multi-link security association between a transmitter upper Media Access Control (MAC) logic entity of a transmitter and a receiver upper MAC logic entity of a receiver. The transmitter includes one or more transmitter links. The receiver includes one or more receiver links.
1. A method, comprising:
establishing a multi-link security association between a transmitter upper Media Access Control (MAC) logic entity of a transmitter and a receiver upper MAC logic entity of a receiver, the transmitter including a first transmitter link and a second transmitter link, the receiver including a first receiver link and a second receiver link, wherein the transmitter upper MAC logic entity is associated with a first Service Set Identifier (SSID);
instantiating a second transmitter upper MAC logic entity of the transmitter associated with a second SSID different than the first SSID;
associating the first transmitter link with the first receiver link at a lower MAC level with a first Pairwise Transient Key Security Association (PTKSA) that is created using a first four-way key exchange using a first Pairwise Master Key (PMK), a first transmitter link nonce, a first receiver link nonce, a first transmitter link address, and a first receiver link address;
associating the second transmitter link with the second receiver link at the lower MAC level with a second PTKSA that is created using a second four-way key exchange using at least a second PMK different from the first PMK;
receiving, at the first receiver link, first data from the first transmitter link via the lower MAC level; and
receiving, at the second receiver link, second data from the second transmitter link via the lower MAC level.
2. The method of claim 1 , wherein the first transmitter link type includes at least one of a 2.4 GHz link, a 5 GHz link, or a 6 GHz link, wherein the first receiver link is a same type of link as the first transmitter link.
3. The method of claim 1 , wherein the first data includes at least one of: a frame, a packet, a MAC Service Data Unit (MSDU), an Aggregate MSDU (A-MSDU), or a MAC Protocol Data Unit (MPDU).
4. The method of claim 1 , further comprising assigning a first identifier to the first data and a second identifier to the second data.
5. The method of claim 4 , wherein the first identifier is assigned to the first data at the lower MAC level at the transmitter.
6. The method of claim 1 , wherein providing the first data to the first receiver link via the first transmitter link includes:
constructing a multi-link MAC frame; and
updating a MAC header to include a transmitter upper MAC logic entity identifier, a receiver upper MAC logic entity identifier, a per link Transmitter Address (TA), a per link Receiver Address (RA), a frame source address, and a Destination Address (DA).
7. The method of claim 1 , wherein providing the first data to the first receiver link via the first transmitter link includes updating a frame control field to indicate a multi-link protocol version.
8. The method of claim 1 , wherein security information is shared between the first transmitter link and the first receiver link at the lower MAC level.
9. A method, comprising:
establishing a multi-link security association between a transmitter upper Media Access Control (MAC) logic entity of a transmitter and a receiver upper MAC logic entity of a receiver, the transmitter including a first transmitter link associated with a first Service Set Identifier (SSID) and a second transmitter link associated with a second Service Set Identifier (SSID) different than the first SSID, the receiver including a first receiver link and a second receiver link;
associating the first transmitter link with the first receiver link at a lower MAC level with a first Pairwise Transient Key Security Association (PTKSA) that is created using a first four-way key exchange using a first Pairwise Master Key (PMK), a first transmitter link nonce, a first receiver link nonce, a first transmitter link address, and a first receiver link address;
associating the second transmitter link with the second receiver link at the lower MAC level with a second PTKSA that is created using a second four-way key exchange using at least a second PMK different from the first PMK;
receiving, at the first receiver link, first data from the first transmitter link via the lower MAC level; and
receiving, at the second receiver link, second data from the second transmitter link via the lower MAC level.
10. The method of claim 9 , wherein the first data includes at least one of: a frame, a packet, a MAC Service Data Unit (MSDU), an Aggregate MSDU (A-MSDU), or a MAC Protocol Data Unit (MPDU).
11. The method of claim 10 , further comprising:
receiving a first identifier that is associated with the first data and a second identifier that is associated with the second data.
12. The method of claim 11 , further comprising performing a reorder operation comprising:
determining, using the first identifier and the second identifier, that the first data was expected to arrive before the second data;
determining that the second data arrived at the receiver before the first data; and
reordering the first data and the second data to place the first data before the second data.
13. The method of claim 11 , further comprising performing a replay check at the lower MAC level at the receiver.
14. The method of claim 10 , wherein a first replay check is performed for the first data that is received via the first receiver link, wherein a second replay check is performed for the second data that is received via the second receiver link.