Packet based link aggregation architectures
Methods, systems, and devices for wireless communication are described. Wireless devices may support parallel communications over multiple wireless links, which may benefit a wireless system in terms of throughput and latency (among other benefits). However, such systems may experience increased system complexity, which may in some cases mitigate some of the benefits provided by the parallel communication links. The described techniques provide for aggregation architectures that address various such complexities. For example, devices communicating in accordance with the described techniques may format data to be transmitted into a set of data units that are allocated to a communication link based on various factors described herein. Correspondingly, a device that receives the data packets may reorder the packets in accordance with the described techniques.
1. An apparatus for wireless communication, comprising:
a processor,
memory in electronic communication with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
establish a multi-link session between a first wireless device and a second wireless device, the multi-link session comprising a plurality of wireless links for communications in parallel between the first wireless device and the second wireless device, wherein the plurality of wireless links support communications between a first media access control (MAC) entity of the first wireless device and a second MAC entity of the second wireless device, wherein each wireless link of the plurality of wireless links is identified by a unique address comprising a transmitter address and a receiver address;
assign data packets associated with a plurality of traffic flows to a common transmit queue, wherein MAC service data units are allocated to the plurality of wireless links from the common transmit queue; and
communicate, over the plurality of wireless links, parallel communications between the first wireless device and the second wireless device, wherein a first traffic flow of the plurality of traffic flows is communicated over a first wireless link of the plurality of wireless links, and a second traffic flow different from the first traffic flow of the plurality of traffic flows is communicated over a second wireless link of the plurality of wireless links.
2. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
format data to be transmitted to the second wireless device into a plurality of data units; and
transmit a first set of data units of the plurality of data units to the second wireless device over the first wireless link of the plurality of wireless links.
3. The apparatus of claim 2 , wherein the instructions are further executable by the processor to cause the apparatus to:
receive a second set of data units of the plurality of data units from the second wireless device over the second wireless link of the plurality of wireless links.
4. The apparatus of claim 2 , wherein the instructions are further executable by the processor to cause the apparatus to:
transmit a second set of data units of the plurality of data units to the second wireless device over the second wireless link of the plurality of wireless links.
5. The apparatus of claim 4 , wherein the instructions are further executable by the processor to cause the apparatus to:
allocate the first set of data units to a first transmit queue for the first wireless link; and
allocate the second set of data units to a second transmit queue for the second wireless link.
6. The apparatus of claim 4 , wherein the instructions are further executable by the processor to cause the apparatus to:
allocate the plurality of data units to the common transmit queue for the first wireless link and the second wireless link.
7. The apparatus of claim 2 , wherein the instructions are further executable by the processor to cause the apparatus to:
receive messages from the second wireless device over the second wireless link of the plurality of wireless links, wherein the second wireless link comprises a narrower bandwidth than the first wireless link.
8. The apparatus of claim 7 , wherein the received messages from the second wireless device over the second wireless link comprise feedback responsive to the transmitted first set of data units.
9. The apparatus of claim 1 , wherein the plurality of wireless links are synchronized in time.
10. The apparatus of claim 1 , wherein a first radio frequency spectrum band punctures the plurality of wireless links, the first radio frequency spectrum band different from each of a plurality of radio frequency spectrum bands corresponding to the plurality of wireless links of the multi-link session.
11. The apparatus of claim 1 , wherein the instructions to communicate further are executable by the processor to cause the apparatus to:
communicate to the second wireless device over the first wireless link of the plurality of wireless links; and
communicate to a third wireless device over the second wireless link of the plurality of wireless links.
12. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
receive a first set of data units from the second wireless device over the first wireless link of the plurality of wireless links;
receive a second set of data units from the second wireless device over the second wireless link of the plurality of wireless links; and
reorder the first set of data units and the second set of data units to generate a single data message for the second wireless device.
13. The apparatus of claim 12 , wherein the instructions are further executable by the processor to cause the apparatus to:
aggregate the first set of data units into a first receive queue for the first wireless link; and
aggregate the second set of data units into a second receive queue for the second wireless link.
14. The apparatus of claim 1 , wherein the first traffic flow of the plurality of traffic flows is associated with a first traffic identifier and the second traffic flow of the plurality of traffic flows is associated with a second traffic identifier.
15. The apparatus of claim 1 , wherein the first traffic flow of the plurality of traffic flows is associated with a first type of data packets and the second traffic flow of the plurality of traffic flows is associated with a second type of data packets.
16. A method for wireless communication at a first wireless device, comprising:
establish a multi-link session between the first wireless device and a second wireless device, the multi-link session comprising a plurality of wireless links for communications in parallel between the first wireless device and the second wireless device, wherein the plurality of wireless links support communications between a first media access control (MAC) entity of the first wireless device and a second MAC entity of the second wireless device, wherein each wireless link of the plurality of wireless links is identified by a unique address comprising a transmitter address and a receiver address;
assign data packets associated with a plurality of traffic flows to a common transmit queue, wherein MAC service data units are allocated to the plurality of wireless links from the common transmit queue; and
communicate, over the plurality of wireless links, parallel communications between the first wireless device and the second wireless device, wherein a first traffic flow of the plurality of traffic flows is communicated over a first wireless link of the plurality of wireless links, and a second traffic flow different from the first traffic flow of the plurality of traffic flows is communicated over a second wireless link of the plurality of wireless links.
17. The method of claim 16 , further comprising:
formatting data to be transmitted to the second wireless device into a plurality of data units; and
transmitting a first set of data units of the plurality of data units to the second wireless device over the first wireless link of the plurality of wireless links.
18. The method of claim 17 , further comprising:
receiving a second set of data units of the plurality of data units from the second wireless device over the second wireless link of the plurality of wireless links.
19. The method of claim 17 , further comprising:
transmitting a second set of data units of the plurality of data units to the second wireless device over the second wireless link of the plurality of wireless links.
20. The method of claim 19 , further comprising:
allocating the first set of data units to a first transmit queue for the first wireless link; and
allocating the second set of data units to a second transmit queue for the second wireless link.
21. The method of claim 19 , further comprising:
allocating the plurality of data units to the common transmit queue for the first wireless link and the second wireless link.
22. The method of claim 17 , further comprising:
receiving messages from the second wireless device over the second wireless link of the plurality of wireless links, wherein the second wireless link comprises a narrower bandwidth than the first wireless link.
23. The method of claim 22 , wherein the received messages from the second wireless device over the second wireless link comprise feedback responsive to the transmitted first set of data units.
24. The method of claim 16 , wherein the plurality of wireless links are synchronized in time.
25. The method of claim 16 , wherein a first radio frequency spectrum band punctures the plurality of wireless links, the first radio frequency spectrum band different from each of a plurality of radio frequency spectrum bands corresponding to the plurality of wireless links of the multi-link session.
26. The method of claim 16 , wherein communicating further comprises:
communicating to the second wireless device over the first wireless link of the plurality of wireless links; and
communicating to a third wireless device over the second wireless link of the plurality of wireless links.
27. The method of claim 16 , further comprising:
receiving a first set of data units from the second wireless device over the first wireless link of the plurality of wireless links;
receiving a second set of data units from the second wireless device over the second wireless link of the plurality of wireless links; and
reordering the first set of data units and the second set of data units to generate a single data message for the second wireless device.
28. The method of claim 27 , further comprising:
aggregating the first set of data units into a first receive queue for the first wireless link; and
aggregating the second set of data units into a second receive queue for the second wireless link.
29. An apparatus for wireless communication, comprising:
means for establishing a multi-link session between a first wireless device and a second wireless device, the multi-link session comprising a plurality of wireless links for communications in parallel between the first wireless device and the second wireless device, wherein the plurality of wireless links support communications between a first media access control (MAC) entity of the first wireless device and a second MAC entity of the second wireless device, wherein each wireless link of the plurality of wireless links is identified by a unique address comprising a transmitter address and a receiver address;
means for assigning data packets associated with a plurality of traffic flows to a common transmit queue, wherein MAC service data units are allocated to the plurality of wireless links from the common transmit queue; and
means for communicating, over the plurality of wireless links, parallel communications between the first wireless device and the second wireless device, wherein a first traffic flow of the plurality of traffic flows is communicated over a first wireless link of the plurality of wireless links, and a second traffic flow different from the first traffic flow of the plurality of traffic flows is communicated over a second wireless link of the plurality of wireless links.
30. The apparatus of claim 29 , further comprising:
means for formatting data to be transmitted to the second wireless device into a plurality of data units; and
means for transmitting a first set of data units of the plurality of data units to the second wireless device over the first wireless link of the plurality of wireless links.