cmcast.txt

CBRP协议（移动adhoc中基于分簇的路由协议）ns2下的源码

 #
 # tcl/ex/newmcast/cmcast.txt
 #
 # Copyright (C) 1997 by USC/ISI
 # All rights reserved.                                            
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 # provided that the above copyright notice and this paragraph are
 # duplicated in all such forms and that any documentation, advertising
 # materials, and other materials related to such distribution and use
 # acknowledge that the software was developed by the University of
 # Southern California, Information Sciences Institute.  The name of the
 # University may not be used to endorse or promote products derived from
 # this software without specific prior written permission.
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 # THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
 # WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 # 
 # Contributed by Polly Huang (USC/ISI), http://www-scf.usc.edu/~bhuang
 # 
 #
source: node 2
RP    : node 3

Register msgs in   : blue
native data pkts in: black

time    entity  event
========================
0.2	node 2:	starts sending in CBR -> registers
0.3	node 1: joins (won't see join messages 'cause this is session mcast)
		but see native data pkts from node 3-> node 1
0.4	node 0: joins, data pkts from node 3-> node 1-> node 0

*0.45	switch tree type from RP tree to shortest path tree
	native data pkts from node 2-> node 1-> node 0
	(slow motion here will see better
)
0.6	node 3: joins, data pkt from node 2 -> node 1 -> node 3 and 0
0.7	node 0: leaves, node 1 stop forwarding to node 0

*0.85	recompute mroutes: pretty much everything stays the same

0.9	node 3: leaves, node 1 stop forwarding to node 3
1.0	node 1: leaves, node 2 stop forwarding to node 1