Method and system for improving wireless link efficiency
A transmission system can improve transmission efficiency of a wireless link using multi-TID aggregate frames. The system can receive a block acknowledgement from a destination device, in response to sending a first multi-TID aggregate frame to the destination device via a wireless link. The system can compute a packet error rate for a respective TID based at least on the block acknowledgement. If the system determines that the packet error rate for the respective TID is greater than a predetermined threshold, the system can reserve a number of packet slots in a second aggregate frame for duplicate packets of the respective TID. The system may then generate the second multi-TID aggregate frame that includes duplicate packets for the respective TID in the number of reserved packet slots, and can send the second multi-TID aggregate frame to the destination device via the wireless link.
1. A method for wireless link transmission, comprising:
receiving a block acknowledgement from a destination device in response to sending a first multi-traffic identifier (TID) aggregate frame to the destination device via a wireless link, wherein each of the packets of a respective multi-TID aggregate frame have the same virtual traffic identifier (virtual TID) in a corresponding packet header, and wherein two or more packets in the multi-TID aggregate frame have different original traffic identifiers (TIDs) in a corresponding packet payload;
computing a TID packet error rate for a respective TID based at least on the block acknowledgement;
in response to determining that the TID packet error rate for the respective TID is greater than a predetermined threshold, reserving a number of packet slots in a second aggregate frame for duplicate packets of the respective TID;
generating the second multi-TID aggregate frame that includes duplicate packets for the respective TID in the number of reserved packet slots; and
sending the second multi-TID aggregate frame to the destination device via the wireless link.
2. The method of claim 1 , wherein computing the TID packet error rate involves monitoring an error rate for a respective original TID in one or more aggregate frames.
3. The method of claim 1 , wherein a respective reserved packet slot of the second multi-TID aggregate frame includes a duplicate packet that is a duplicate of another packet in the second aggregate frame.
4. The method of claim 3 , wherein the duplicate packet and the other packet have the same original TID and the same original sequence number.
5. The method of claim 3 , wherein the duplicate packet and the other packet have the same virtual TID and different virtual sequence numbers.
6. The method of claim 1 , wherein sending the second multi-TID aggregate frame to the destination device over the wireless link involves transmitting the second multi-TID aggregate frame over an IEEE 802.11 wireless link.
7. The method claim 1 , wherein the packets in the respective multi-TID aggregate frame have continuous virtual sequence numbers.
8. The method claim 1 , wherein the packets in the respective multi-TID aggregate frame have non-continuous original sequence numbers.
9. A non-transitory computer-readable storage medium storing instructions that when executed by a computer cause the computer to perform a method, the method comprising:
receiving a block acknowledgement from a destination device in response to sending a first multi-traffic identifier (TID) aggregate frame to the destination device via a wireless link, wherein each of the packets of a respective multi-TID aggregate frame have the same virtual traffic identifier (virtual TID) in a corresponding packet header, and wherein two or more packets in the multi-TID aggregate frame have different original traffic identifiers (TIDs) in a corresponding packet payload;
computing a TID packet error rate for a respective TID based at least on the block acknowledgement;
in response to determining that the TID packet error rate for the respective TID is greater than a predetermined threshold, reserving a number of packet slots in a second aggregate frame for duplicate packets of the respective TID;
generating the second multi-TID aggregate frame that includes duplicate packets for the respective TID in the number of reserved packet slots; and
sending the second multi-TID aggregate frame to the destination device via the wireless link.
10. The non-transitory computer-readable storage medium of claim 9 , wherein computing the TID packet error rate involves monitoring an error rate for a respective original TID in one or more aggregate frames.
11. The non-transitory computer-readable storage medium of claim 9 , wherein a respective reserved packet slot of the second multi-TID aggregate frame includes a duplicate packet that is a duplicate of another packet in the second aggregate frame.
12. The non-transitory computer-readable storage medium of claim 11 , wherein the duplicate packet and the other packet have the same original TID and the same original sequence number.
13. The non-transitory computer-readable storage medium of claim 11 , wherein the duplicate packet and the other packet have the same virtual TID and different virtual sequence numbers.
14. The non-transitory computer-readable storage medium of claim 9 , wherein sending the second multi-TID aggregate frame to the destination device over the wireless link involves transmitting the second multi-TID aggregate frame over an IEEE 802.11 wireless link.
15. A system of wireless link transmission, comprising:
a network protocol stack operable to a block acknowledgement from a destination device in response to sending a first multi-traffic identifier (TID) aggregate frame to the destination device via a wireless link, wherein each of the packets of a respective multi-TID aggregate frame have the same virtual traffic identifier (virtual TID) in a corresponding packet header, and wherein two or more packets in the multi-TID aggregate frame have different original identifiers (TIDs) in a corresponding packet payload;
a monitoring circuit operable to compute a TID packet error rate for a respective TID based at least on the block acknowledgement;
an aggregation release circuit operable to:
determine that the TID packet error rate for the respective TID is greater than a predetermined threshold;
reserve a number of packet slots in a second aggregate frame for duplicate packets of the respective TID in response to; and
generate the second multi-TID aggregate frame that includes duplicate packets for the respective TID in the number of reserved packet slots; and
a transmitter operable to send the second multi-TID aggregate frame to the destination device via the wireless link.
16. The system of claim 15 , wherein the monitoring circuit is further operable to monitor an error rate for a respective original TID in one or more aggregate frames.
17. The system of claim 15 , wherein a respective reserved packet slot of the second multi-TID aggregate frame includes a duplicate packet that is a duplicate of another packet in the second aggregate frame.
18. The system of claim 17 , wherein the duplicate packet and the other packet have the same original TID and the same original sequence number.
19. The system of claim 17 , wherein the duplicate packet and the other packet have the same virtual TID and different virtual sequence numbers.
20. The system of claim 15 , wherein while sending the second multi-TID aggregate frame to the destination device, the transmitter is further operable to transmit the second multi-TID aggregate frame over an IEEE 802.11 wireless link.