session.README
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- Trace file:
- session.nam.gz
- Purpose:
- demonstrate the difference in between regular (detailed) packet
- forwarding and session level packet scheduling
- Topology:
- 255 nodes and 266 links partial MBone topology
- equal link bandwidth (512bps) and delay (10ms)
- obtained by Mark Handley's(mjh@east.isi.edu) MBone trace tools
- Source:
- node 209
- noted in red
- Members:
- 30 of them
- randomly selected
- noted in black
- Traffic:
- 1 pkt every 37.5ms
- 210 bytes per packet
- starting at simulation time 1.0
- Graph on the left:
- - regular/detailed multicast packet forwarding
- - packets traverse through nodes and links (basically a multicast
- tree) to reach group members.
- Graph on the right:
- - session level packet scheduling
- - the delay to transfer a packet from the source to its
- receiver is computed and a receive(pkt) event is directly
- scheduled to happen after the delay at the receiver
- - number of red dots attached to group receivers represents the
- number of packets that have been sent and waiting to be received.
- - the larger the (delay x bandwidth) in between the source and
- receiver, the higher the queue of red dots.
- Polly Huang, Mon Mar 16 15:52:40 PST 1998
- huang@isi.edu