Throughput enhancement by acknowledgment suppression
View Patent ↗Systems and methods for improving data transmission rates in communication networks are disclosed. In an 802.11 wireless communication network, where a source node of the wireless network transmits TCP data to a destination node of the wireless network, the destination node does not transmit TCP acknowledgments (ACKs) for the TCP data if 802.11 ACKs indicate that the destination node received the TCP data. If a source outside the wireless network transmits TCP data to the destination node within the wireless network through an intermediate device, such as an access point, the destination node suppresses transmitting TCP ACKs. The intermediate device transmits TCP ACKs as proxy for the destination node to the source. The intermediate device also suppresses TCP ACKs where a source node within the wireless network sends the TCP data to a destination node outside of the wireless network.
1. A method for increasing data throughput, the method comprising:
performing a handshake between an intermediate device and a destination device, wherein the handshake enables acknowledgement suppression between the intermediate device and the destination device;
receiving data at the intermediate device, the received data originating from a source device and directed to the destination device;
transmitting the received data using a higher layer protocol, from the intermediate device to the destination device;
receiving a first acknowledgment of a lower layer protocol, sent from the destination device to the intermediate device, wherein the destination device suppresses any acknowledgement using the higher level protocol from being sent to the intermediate device;
determining that the destination device received the data without error based on the first acknowledgement;
synthesizing a second acknowledgement based on the first acknowledgement, the second acknowledgment spoofed as being from the destination device; and
transmitting the second acknowledgment using the higher layer protocol, from the intermediate device to the source device.
2. The method of claim 1 , wherein the higher layer protocol comprises TCP and wherein the second acknowledgement using the higher layer protocol comprise a TCP ACK.
3. The method of claim 1 , wherein the lower layer protocol comprises an 802.11 protocol and wherein the first acknowledgment using the lower layer protocol comprise an 802.11 ACK.
4. The method of claim 1 , further comprising broadcasting a beacon from the intermediate device, the beacon advertising a capability of synthesizing an acknowledgement using the higher level protocol based on an acknowledgement using the lower level protocol.
5. The method of claim 1 , wherein performing the handshake allows the intermediate device to identify that the destination device supports acknowledgment suppression.
6. The method of claim 1 , further comprising:
receiving subsequent data from the source device directed to the destination device;
determining that the subsequent data requires a buffer capacity; and
suspending acknowledgment suppression for the subsequent data based on the buffer capacity.
7. The method of claim 6 , wherein the suspension of acknowledgment suppression only applies to a subset of packets associated with the subsequent data and wherein acknowledgment suppression applies to a remaining subset of packets.
8. The method of claim 6 , further comprising reducing data transmission rates based on the buffer capacity.
9. The method of claim 6 , further comprising suspending synthesis of acknowledgments using the lower layer protocol based on the buffer capacity.
10. A wireless device for increasing data throughput, the device comprising:
a communications interface for receiving data originating from a source device and directed to a destination device;
a wireless communication apparatus for:
performing a handshake with the destination device, wherein the handshake enables acknowledgement suppression between the wireless device and the destination device,
transmitting the received data using a higher layer protocol to the destination device, and
receiving a first acknowledgment of a lower layer protocol, sent from the destination device to the intermediate device, wherein the destination device suppresses any acknowledgement using the higher level protocol from being sent to the intermediate device;
a processor to execute instructions, wherein execution of the instructions by the processor:
determines that the destination device received the data without error based on the first acknowledgement, and
synthesizes a second acknowledgement based on the first acknowledgement, the second acknowledgment spoofed as being from the destination device, wherein the second acknowledgment using the higher layer protocol is transmitted from the intermediate device to the source device.
11. The device of claim 10 , wherein the wireless communication apparatus comprises an antenna apparatus and an 802.11 RF communication apparatus.
12. The device of claim 10 , wherein the higher layer protocol comprises TCP and wherein the second acknowledgement using the higher layer protocol comprise a TCP ACK.
13. The device of claim 10 , wherein the lower layer protocol comprises an 802.11 protocol and wherein the first acknowledgment using the lower layer protocol comprise an 802.11 ACK.
14. The device of claim 10 , wherein the wireless communications apparatus broadcasts a beacon from the intermediate device, the beacon advertising a capability of synthesizing an acknowledgement using the higher level protocol based on an acknowledgement using the lower level protocol.
15. The device of claim 10 , wherein the handshake allows for identification that the destination device supports acknowledgment suppression.
16. The device of claim 10 , wherein the communications interface receives subsequent data from the source device directed to the destination device and wherein further execution of instructions by the processor:
determines that the subsequent data requires a buffer capacity; and
suspends acknowledgment suppression for the subsequent data based on the buffer capacity.
17. The device of claim 16 , wherein the suspension of acknowledgment suppression only applies to a subset of packets associated with the subsequent data and wherein acknowledgment suppression applies to a remaining subset of packets.
18. The device of claim 16 , wherein further execution of instructions by the processor reduces data transmission rates based on the buffer capacity.
19. The device of claim 16 , wherein further execution of instructions by the processor suspends synthesis of acknowledgments using the lower layer protocol based on the buffer capacity.
20. A non-transitory computer-readable storage medium, having embodied thereon a program executable by a processor to perform a method for increasing data throughput, the method comprising:
performing a handshake between an intermediate device and a destination device, wherein the handshake enables acknowledgement suppression between the intermediate device and the destination device;
receiving data at the intermediate device, the received data originating from a source device and directed to the destination device;
transmitting the received data using a higher layer protocol, from the intermediate device to the destination device;
receiving a first acknowledgment of a lower layer protocol, sent from the destination device to the intermediate device, wherein the destination device suppresses any acknowledgement using the higher level protocol from being sent to the intermediate device;
determining that the destination device received the data without error based on the first acknowledgement;
synthesizing a second acknowledgement based on the first acknowledgement, the second acknowledgment spoofed as being from the destination device; and
transmitting the second acknowledgment using the higher layer protocol, from the intermediate device to the source device.