Overhead of a Parallel Session

Our next experiment quantifies the ability of SSCH to fairly share bandwidth between two flows, and to quickly achieve this fair sharing. To measure this we start with Node 1 sending a maximum rate UDP stream to Node 2. At 21.5 seconds, Node 1 starts a second maximum rate UDP stream to Node 3. Figure 6 presents a moving average of the throughput achieved by both nodes over a period of 140 ms. It illustrates the instantaneous throughput achieved at Nodes 2 and 3 (the receivers). The bandwidth is split between the receivers nearly perfectly (and with no decrease in net throughput) within 200 ms.

Figure 6: Overhead of a Parallel Session: Node 1 is sending a maximum rate UDP stream to Node 2. Node 1 then starts a second stream to Node 3.