Methods and systems for transmitting and receiving data packets through a bonded connection
The present invention relates to methods and systems for transmitting and receiving data packets between a first network node and a second network node through a bonded connection. At the first network node, a data packet, a session identification of the data packet and a time value of the data packet are encapsulated in an encapsulating packet. The first network node sends the encapsulating packet from the first network node to the second network node through the bonded connection. The second network node then stores the encapsulating packet after receiving it and determines an expiration time of the encapsulating packet. When the expiration time of the encapsulating packet expired, the second network node dequeues the encapsulating packet and forwards the data packet according to destination of the data packet.
1. A method of packet processing at a receiving network node through a plurality of connections, comprising:
(a) determining a buffer period;
(b) receiving a transmitted packet transmitted by a sending network node;
(c) identifying a session and a session sequence number of the transmitted packet;
(d) determining a queue according to the session for the transmitted packet to be stored:
(i) when the queue is empty, determining an expiration time based on the buffer period;
(ii) when the queue is not empty, determining the expiration time based on a difference of time value between a corresponding time value of one or more of currently-stored transmitted packets and a corresponding time value of the transmitted packet;
(e) storing the transmitted packet in the queue according to the session sequence number;
wherein:
the plurality of connections are bonded together as a bonded connection;
the transmitted packet is an encapsulated packet;
the session sequence number is encapsulated in the transmitted packet;
the session sequence number places the transmitted packet at a position in the queue; and
when none of corresponding session sequence numbers of previously-arrived transmitted packets is one, no data packet is forwarded to a destination network node.
2. The method of claim 1 , wherein:
the transmitted packet is decapsulated to retrieve a data packet; and
the data packet is forwarded to the destination network node according to a destination address of the data packet.
3. The method of claim 1 , wherein the buffer period is configurable per bonded connection, per session, or per session per bonded connection.
4. The method of claim 1 , wherein;
the session is identified according to a session identification in the transmitted packet; and
the session sequence number orders the transmitted packet in a plurality of transmitted packets belonging to the session.
5. The method of claim 1 , wherein the transmitted packet is transmitted to the receiving network node through one of the plurality of connections established between the sending network node and the receiving network node.
6. The method of claim 1 , wherein the corresponding time value of the transmitted packet is recorded in microsecond precision or nanosecond precision.
7. The method of claim 6 , wherein the corresponding time value of the transmitted packet is determined based on an arrival time of the transmitted packet at the sending network node.
8. The method of claim 6 , wherein the corresponding time value of the transmitted packet is determined based on a transmission time of the transmitted packet at the sending network node.
9. The method of claim 1 , wherein the transmitted packet is dequeued from the queue when the expiration time is expired or upon being expired.
10. The method of claim 1 , further comprising:
when the session sequence number of the transmitted packet is smallest among corresponding session sequence numbers of all of the currently-stored transmitted packets in the queue, increasing corresponding expiration time of all of the currently-stored transmitted packets.
11. A method of packet processing at a receiving network node through a plurality of connections, comprising:
at least one network interface;
at least one processing unit; and
at least one non-transitory computer-readable storage medium storing program instructions executable by the at least one processing unit and configured to cause the at least one processing unit to perform:
(a) determining a buffer period;
(b) receiving a transmitted packet transmitted by a sending network node;
(c) identifying a session and a session sequence number of the transmitted packet;
(d) determining a queue according to the session for the transmitted packet to be stored:
(i) when the queue is empty, determining an expiration time based on the buffer period;
(ii) when the queue is not empty, determining the expiration time based on a difference of time value between a corresponding time value of one or more of currently-stored transmitted packets and a corresponding time value of the transmitted packet;
(e) storing the transmitted packet in the queue according to the session sequence number;
wherein:
the plurality of connections are bonded together as a bonded connection;
the transmitted packet is an encapsulated packet;
the session sequence number is encapsulated in the transmitted packet;
the session sequence number places the transmitted packet at a position in the queue; and
when none of corresponding session sequence numbers of previously-arrived transmitted packets is one, no data packet is forwarded to a destination network node.
12. The network device in claim 11 , wherein:
the transmitted packet is decapsulated to retrieve a data packet; and
the data packet is forwarded to the destination network node according to a destination address of the data packet.
13. The network device in claim 11 , wherein the buffer period is configurable per bonded connection, per session, or per session per bonded connection.
14. The network device in claim 11 , wherein;
the session is identified according to a session identification in the transmitted packet; and
the session sequence number orders the transmitted packet in a plurality of transmitted packets belonging to the session.
15. The network device in claim 11 , wherein the transmitted packet is transmitted to the network device through one of the plurality of connections established between the sending network node and the receiving network-node.
16. The network device in claim 11 , wherein the corresponding time value of the transmitted packet is recorded in microsecond precision or nanosecond precision.
17. The network device in claim 16 , wherein the corresponding time value of the transmitted packet is determined based on an arrival time of the transmitted packet at the sending network node.
18. The network device in claim 16 , wherein the corresponding time value of the transmitted packet is determined based on a transmission time of the transmitted packet at the sending network node.
19. The network device in claim 11 , wherein the transmitted packet is dequeued from the queue when the expiration time is expired or upon being expired.
20. The network device in claim 11 , wherein the at least one non-transitory computer readable storage medium further stores program instructions executable by the at least one processing unit and configured to cause the at least one processing unit to perform:
when the session sequence number of the transmitted packet is smallest among corresponding session sequence numbers of all of the currently-stored transmitted packets in the queue, increasing corresponding expiration time of all of the currently-stored transmitted packets.