Method for transmitting data packets between nodes of a communication network
Data packets are aggregated to form a burst in an aggregation buffer of an ingress node. A header of the burst containing information about the burst length is sent to a destination node, and after an offset time the burst is sent to the destination node. The burst length is calculated and the header is sent to the destination node before the aggregation of the burst is completed.
1 - 12 . (canceled)
13 . A method of transmitting data packets between nodes of a communication network, the packets aggregated to form a burst in an aggregation buffer included in an ingress node of the communication network, the method comprising:
aggregating the packets to form the burst;
calculating a burst length of the burst;
sending a header of the burst to a destination node of the communication network, the header including information about the burst length; and
sending the burst to the destination node after elapse of an offset time interval, wherein
the burst length is calculated before aggregation of the packets is completed, and
the header is sent to the destination burst before aggregation of the packets is completed.
14 . The method as claimed in claim 13 , wherein the burst length is calculated after receiving a number of but not all of the packets of the burst by the destination node, and the header is sent subsequently after said receiving.
15 . The method as claimed in claim 14 , wherein the burst length is calculated after the first of the number of packets is received by the destination node.
16 . The method as claimed in claim 13 , wherein, after aggregating a number of but not all of the packets of the burst, the burst length is calculated, the offset time interval starts, the header is sent to the destination node, and the burst is sent to the destination node after the elapse of the offset time interval.
17 . The method as claimed in claim 13 , wherein the burst length is calculated based on an average packet size, an average packet rate, and the offset time interval.
18 . The method as claimed in claim 13 , wherein the burst length is calculated from the mathematical product of an average packet size and a sum, the sum calculated from a number of currently aggregated packets plus the mathematical product of an average packet rate and the offset time interval.
19 . The method as claimed in claim 13 , further comprising determining a real burst length of the burst while aggregating the packets of the burst, wherein
aggregation of the packets of the burst is stopped,
odd packets and arriving packets are aggregated to a further burst, and
a header of the further burst is sent to the destination node, if the real burst length exceeds the calculated burst length while aggregating the packets of the burst.
20 . The method as claimed in claim 19 , wherein a burst length of the further burst is calculated by adding the number of the odd packets to the calculated burst length.
21 . The method as claimed in claim 13 , wherein an average packet rate is used for calculating the burst length, the average packet rate continuously calculated while aggregating the packets.
22 . The method as claimed in claim 13 , wherein the data packets are IP packets.
23 . The method as claimed in claim 13 , wherein the communication network is an Optical Burst Switching network.
24 . A node of a communication network, comprising:
an aggregation buffer for storing a data burst formed by aggregating data packets; and
a control unit adapted to:
aggregate the data packets to form the data burst;
calculate a burst length of the data burst;
send a header of the data burst to a destination node of the communication network, the header including information about the burst length; and
send the burst to the destination node after elapse of an offset time interval, wherein
the burst length is calculated before aggregation of the packets is completed, and
the header is sent to the destination burst before aggregation of the packets is completed.