Packet coding based network communication
A method for data communication between a first node and a second node includes forming one or more redundancy messages from data messages at the first node using an error correcting code and transmitting first messages from the first node to the second node over a data path, the transmitted first messages including the data messages and the one or more redundancy messages. Second messages are received at the first node from the second node, which are indicative of: (i) a rate of arrival at the second node of the first messages, and (ii) successful and unsuccessful delivery of the first messages. A transmission rate limit and a window size are maintained according to the received second messages. Transmission of additional messages from the first node to the second node is limited according to the maintained transmission rate limit and window size.
1. A method for data communication between a first node and a second node over a data path coupling the first node and the second node, the method comprising:
forming one or more redundancy messages from data messages at the first node using an error correcting code;
transmitting first messages from the first node to the second node over the data path, the transmitted first messages including the data messages and the one or more redundancy messages;
receiving second messages at the first node from the second node, the second messages being indicative of: (i) a rate of arrival at the second node of the first messages transmitted from the first node, and (ii) successful and unsuccessful delivery of the first messages transmitted from the first node to the second node;
maintaining a transmission rate limit according to the received second messages;
maintaining a window size according to the received second messages; and
limiting transmission of additional messages from the first node to the second node according to the maintained transmission rate limit and the maintained window size.
2. The method of claim 1 , wherein limiting transmission of the additional messages according to the maintained transmission rate limit includes limiting a transmission rate of the additional messages.
3. The method of claim 1 , wherein the maintained window size comprises a congestion control window size.
4. The method of claim 1 , wherein limiting transmission of the additional messages according to the maintained window size includes limiting a number of the additional messages not yet acknowledged as successfully delivered to the second node according to the maintained window size.
5. The method of claim 1 , wherein receiving the second messages indicative of the rate of arrival comprises receiving acknowledgment messages from the second node, wherein a rate of arrival of the acknowledgment messages is indicative of the rate of arrival of the messages at the second node.
6. The method of claim 5 , wherein the rate of arrival of the acknowledgment includes a rate of acknowledgment of packets.
7. The method of claim 1 , wherein the second messages include third messages indicative of the rate of arrival and fourth messages indicative of successful and unsuccessful delivery of the first messages.
8. The method of claim 1 , wherein a single message of the second messages is indicative of: (i) the rate of arrival at the second node of the first messages transmitted from the first node, and (ii) successful and unsuccessful delivery of the first messages transmitted from the first node to the second node.
9. The method of claim 1 , wherein the error correcting code is a linear error correcting code.
10. The method of claim 1 , wherein the error correcting code is a nonlinear error correcting code.
11. A communication apparatus comprising a first device having an interface for passing messages to and from a second device over a communication path coupling the first device to second device, the first device further comprising a communication controller configured to:
form one or more redundancy messages from data messages at the first node using an error correcting code;
transmit first messages from the first node to the second node over the data path, the transmitted first messages including the data messages and the one or more redundancy messages;
receive second messages at the first node from the second node, the second messages being indicative of: (i) a rate of arrival at the second node of the first messages transmitted from the first node, and (ii) successful and unsuccessful delivery of the first messages transmitted from the first node to the second node;
maintain a transmission rate limit according to the received second messages;
maintain a window size according to the received second messages; and
limit transmission of additional messages from the first node to the second node according to the maintained transmission rate limit and the maintained window size.
12. The communication apparatus of claim 11 , wherein limiting transmission of the additional messages according to the maintained transmission rate limit includes limiting a transmission rate of the additional messages.
13. The communication apparatus of claim 11 , wherein the maintained window size comprises a congestion control window size.
14. The communication apparatus of claim 11 , wherein limiting transmission of the additional messages according to the maintained window size includes limiting a number of the additional messages not yet acknowledged as successfully delivered to the second node according to the maintained window size.
15. The communication apparatus of claim 11 , wherein receiving the second messages indicative of the rate of arrival comprises receiving acknowledgment messages from the second node, wherein a rate of arrival of the acknowledgment messages is indicative of the rate of arrival of the messages at the second node.
16. The communication apparatus of claim 15 , wherein the rate of arrival of the acknowledgment includes a rate of acknowledgment of packets.
17. The communication apparatus of claim 11 , wherein the second messages include third messages indicative of the rate of arrival and fourth messages indicative of successful and unsuccessful delivery of the first messages.
18. The communication apparatus of claim 11 , wherein a single message of the second messages is indicative of: (i) the rate of arrival at the second node of the first messages transmitted from the first node, and (ii) successful and unsuccessful delivery of the first messages transmitted from the first node to the second node.
19. The communication apparatus of claim 11 , wherein the error correcting code is a linear error correcting code.
20. The communication apparatus of claim 11 , wherein the error correcting code is a nonlinear error correcting code.